-
7 Articoli
-
0 Foto
-
0 Video
-
Male
-
22/05/1985
-
Seguito da 0 people
Aggiornamenti recenti
-
5dose-dependently with an IC50 of 24.0 ± 2.4 mg/mL. Copyright © 2020 Bo Liang et al.Background Recently, measuring and benchmarking provision of healthcare services has drawn a considerable attention. This scoping review was conducted to identify, describe, and summarize studies in which the Delphi technique was used to develop quality indicators of pharmaceutical care. The study also aimed to identify activities and services that could be used to capture the impact of pharmacist in integrative medicine. Methods Databases were searched from inception to February 2020 using key terms that were combined using Boolean operators. Studies were included if they were relevant to development of quality indicators of pharmaceutical care with regard to medications or complementary and alternative medicine (CAM) modalities. Full text of the selected studies was imported into EndNote. Studies were screened and data were extracted into a standard extraction form. Results Data were extracted from 31 studies. Of those, 24 (77.4%) were related to provision of pharmaceutical services relevant to medications healthcare facilities. Copyright © 2020 Ramzi Shawahna.Erchen decoction (ECD) is a common treatment prescribed in traditional Chinese medicine (TCM) clinics, which has remarkable efficacy in the treatment of obesity, fatty liver, hyperlipidemia, diabetes, and other diseases caused by phlegm. In this study, we investigated the effect that ECD had on the lipid metabolism induced by high-fat diet in C57BL/6 ****. Body weight, body length, and abdominal circumference were detected. https://www.selleckchem.com/products/tvb-3664.html Blood lipid content was measured via biochemical assay kit. The gene and protein expression of PPARγ and LPL in visceral fat and skeletal muscle of **** was measured by real-time PCR and western blot. The research discovered that the phlegm-resolving effect that ECD had on high-fat diet **** was mainly manifested as reduced body weight, Lee's index, abdominal circumference, and level of TG and TC. Meanwhile, we observed significantly increased PPARγ mRNA and protein level in visceral fat and PPARγ and LPL protein level in skeletal muscle in the ECD group. Contrarily, a decrease in PPARγ mRNA level in skeletal muscle in the ECD group was observed. Therefore, we speculate that ECD regulates the lipid metabolic disorder by decreasing the blood lipid level. Moreover, the potential molecular mechanism of ECD is to promote the expression of PPARγ in visceral fat and skeletal muscle and the expression of LPL in skeletal muscle. Copyright © 2020 Mengting Zhang et al.The non-small-cell lung cancer (NSCLC) is the most common lung cancer which seriously threatens the human health. Xu Li's experiential prescription (XLEP) can treat the NSCLC. However, whether XLEP can regulate the autophagy in the EGFR-positive NSCLC still remains unknown. We found that the cellular activity of drug-resistant cells and sensitive cells were all decreased in the TCM group and TCM + Gef group. The expression of autophagy-associated proteins (mTOR and Beclin1-Vps34) in drug-resistant cells was decreased in the TCM group, while the expression of autophagy-associated proteins in sensitive cells was all decreased in the TCM + Gef group. The ratio of M1/M2 macrophages was increased when IL-4-induced RAW264.7 was treated with TCM. TCM treatment promoted the expression of CCL2 and CCL3 while it downregulated the CCL22 level among A549, H1975, and PC9 cells. The expression of TNF-α and IL-6 was increased, and the expression of IL-10 and TGF-β was decreased in IL-4-induced RAW264.7 cells treated with TCM. And, TCM treatment also decreased the expression of Fizz1 and TGM2. In conclusion, this study indicated that XLEP could suppress the proliferation of EGFR-TKI-resistant cancer cells and increase the ratio of M1/M2 macrophages by inhibiting autophagy to treat the drug-resistant EGFR-positive NSCLC. Copyright © 2020 Bin Xu et al.Background Caralluma europaea (C. europaea) is a medicinal plant used in Moroccan popular medicine. Objective of the Study. The present work was aimed at identifying the chemical composition and the antioxidant and antiproliferative activities of hydroethanolic and bioactive compound classes of C. europaea) is a medicinal plant used in Moroccan popular medicine. Materials and Methods. The chemical composition was analyzed using HPLC. The antioxidant power was determined using both DPPH and FRAP assays. The antiproliferative activity was effectuated against cancerous cells using WST-1. Results The chemical analysis showed the presence of bioactive constituents such as quercetin, myricetin, and hesperetin. The polyphenol and flavonoid contents were estimated at 51.42 mg GA/g and 20.06 mg EQ/g, respectively. The EC50 values of FRAP assay of hydroethanolic, flavonoid, saponin, and mucilage extracts were 5.196 mg/ml, 4.537 mg/ml, 3.05 mg/ml, and 6.02 mg/ml, respectively. The obtained IC50 values with the DPPH test were 1.628 mg/ml, 1.05 mg/ml, 1.94 mg/ml, and 9.674 mg/ml, respectively. Regarding MDA-MB-231, saponins were highly effective even with the lowest concentration (15.62 μg/ml). The flavonoids decreased the cell viability with IC50 values of 43.62 ± 0.06 μg/ml). The flavonoids decreased the cell viability with IC50 values of 43.62 ± 0.06 μg/ml). The flavonoids decreased the cell viability with IC50 values of 43.62 ± 0.06 . Conclusion The present results suggest that C. europaea) is a medicinal plant used in Moroccan popular medicine. Copyright © 2020 Fatima ez-zahra Amrati et al.The present study aimed to evaluate the potential synergistic and protective effects of ALM16, a mixture of Astragalus membranaceus (AM) and Lithospermum erythrorhizon (LE) extract in a ratio of 7 3, against hepatic steatosis in high fat diet (HFD)-induced nonalcoholic fatty liver disease (NAFLD) ****. Forty-eight **** were randomly divided into eight groups and orally administered daily for 6 weeks with a normal diet (ND) or high fat diet alone (HFD), HFD with AM (HFD + 100 mg/kg AM extract), HFD with LE (HFD + 100 mg/kg LE extract), HFD with ALM16 (HFD + 50, 100, and 200 mg/kg ALM16), or HFD with MT (HFD + 100 mg/kg Milk thistle extract) as a positive control. ALM16 significantly decreased the body and liver weight, serum and hepatic lipid profiles, including triglyceride (TG), total cholesterol (TC), high-density lipoprotein-cholesterol (HDL), and low-density lipoprotein-cholesterol (LDL), and serum glucose levels, compared to the HFD group. Moreover, ALM16 significantly ameliorated the HFD-induced increased hepatic injury markers, including aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), lactate dehydrogenase (LDH), and gamma-glutamyltransferase (GGT)-1.
5dose-dependently with an IC50 of 24.0 ± 2.4 mg/mL. Copyright © 2020 Bo Liang et al.Background Recently, measuring and benchmarking provision of healthcare services has drawn a considerable attention. This scoping review was conducted to identify, describe, and summarize studies in which the Delphi technique was used to develop quality indicators of pharmaceutical care. The study also aimed to identify activities and services that could be used to capture the impact of pharmacist in integrative medicine. Methods Databases were searched from inception to February 2020 using key terms that were combined using Boolean operators. Studies were included if they were relevant to development of quality indicators of pharmaceutical care with regard to medications or complementary and alternative medicine (CAM) modalities. Full text of the selected studies was imported into EndNote. Studies were screened and data were extracted into a standard extraction form. Results Data were extracted from 31 studies. Of those, 24 (77.4%) were related to provision of pharmaceutical services relevant to medications healthcare facilities. Copyright © 2020 Ramzi Shawahna.Erchen decoction (ECD) is a common treatment prescribed in traditional Chinese medicine (TCM) clinics, which has remarkable efficacy in the treatment of obesity, fatty liver, hyperlipidemia, diabetes, and other diseases caused by phlegm. In this study, we investigated the effect that ECD had on the lipid metabolism induced by high-fat diet in C57BL/6 mice. Body weight, body length, and abdominal circumference were detected. https://www.selleckchem.com/products/tvb-3664.html Blood lipid content was measured via biochemical assay kit. The gene and protein expression of PPARγ and LPL in visceral fat and skeletal muscle of mice was measured by real-time PCR and western blot. The research discovered that the phlegm-resolving effect that ECD had on high-fat diet mice was mainly manifested as reduced body weight, Lee's index, abdominal circumference, and level of TG and TC. Meanwhile, we observed significantly increased PPARγ mRNA and protein level in visceral fat and PPARγ and LPL protein level in skeletal muscle in the ECD group. Contrarily, a decrease in PPARγ mRNA level in skeletal muscle in the ECD group was observed. Therefore, we speculate that ECD regulates the lipid metabolic disorder by decreasing the blood lipid level. Moreover, the potential molecular mechanism of ECD is to promote the expression of PPARγ in visceral fat and skeletal muscle and the expression of LPL in skeletal muscle. Copyright © 2020 Mengting Zhang et al.The non-small-cell lung cancer (NSCLC) is the most common lung cancer which seriously threatens the human health. Xu Li's experiential prescription (XLEP) can treat the NSCLC. However, whether XLEP can regulate the autophagy in the EGFR-positive NSCLC still remains unknown. We found that the cellular activity of drug-resistant cells and sensitive cells were all decreased in the TCM group and TCM + Gef group. The expression of autophagy-associated proteins (mTOR and Beclin1-Vps34) in drug-resistant cells was decreased in the TCM group, while the expression of autophagy-associated proteins in sensitive cells was all decreased in the TCM + Gef group. The ratio of M1/M2 macrophages was increased when IL-4-induced RAW264.7 was treated with TCM. TCM treatment promoted the expression of CCL2 and CCL3 while it downregulated the CCL22 level among A549, H1975, and PC9 cells. The expression of TNF-α and IL-6 was increased, and the expression of IL-10 and TGF-β was decreased in IL-4-induced RAW264.7 cells treated with TCM. And, TCM treatment also decreased the expression of Fizz1 and TGM2. In conclusion, this study indicated that XLEP could suppress the proliferation of EGFR-TKI-resistant cancer cells and increase the ratio of M1/M2 macrophages by inhibiting autophagy to treat the drug-resistant EGFR-positive NSCLC. Copyright © 2020 Bin Xu et al.Background Caralluma europaea (C. europaea) is a medicinal plant used in Moroccan popular medicine. Objective of the Study. The present work was aimed at identifying the chemical composition and the antioxidant and antiproliferative activities of hydroethanolic and bioactive compound classes of C. europaea) is a medicinal plant used in Moroccan popular medicine. Materials and Methods. The chemical composition was analyzed using HPLC. The antioxidant power was determined using both DPPH and FRAP assays. The antiproliferative activity was effectuated against cancerous cells using WST-1. Results The chemical analysis showed the presence of bioactive constituents such as quercetin, myricetin, and hesperetin. The polyphenol and flavonoid contents were estimated at 51.42 mg GA/g and 20.06 mg EQ/g, respectively. The EC50 values of FRAP assay of hydroethanolic, flavonoid, saponin, and mucilage extracts were 5.196 mg/ml, 4.537 mg/ml, 3.05 mg/ml, and 6.02 mg/ml, respectively. The obtained IC50 values with the DPPH test were 1.628 mg/ml, 1.05 mg/ml, 1.94 mg/ml, and 9.674 mg/ml, respectively. Regarding MDA-MB-231, saponins were highly effective even with the lowest concentration (15.62 μg/ml). The flavonoids decreased the cell viability with IC50 values of 43.62 ± 0.06 μg/ml). The flavonoids decreased the cell viability with IC50 values of 43.62 ± 0.06 μg/ml). The flavonoids decreased the cell viability with IC50 values of 43.62 ± 0.06 . Conclusion The present results suggest that C. europaea) is a medicinal plant used in Moroccan popular medicine. Copyright © 2020 Fatima ez-zahra Amrati et al.The present study aimed to evaluate the potential synergistic and protective effects of ALM16, a mixture of Astragalus membranaceus (AM) and Lithospermum erythrorhizon (LE) extract in a ratio of 7 3, against hepatic steatosis in high fat diet (HFD)-induced nonalcoholic fatty liver disease (NAFLD) mice. Forty-eight mice were randomly divided into eight groups and orally administered daily for 6 weeks with a normal diet (ND) or high fat diet alone (HFD), HFD with AM (HFD + 100 mg/kg AM extract), HFD with LE (HFD + 100 mg/kg LE extract), HFD with ALM16 (HFD + 50, 100, and 200 mg/kg ALM16), or HFD with MT (HFD + 100 mg/kg Milk thistle extract) as a positive control. ALM16 significantly decreased the body and liver weight, serum and hepatic lipid profiles, including triglyceride (TG), total cholesterol (TC), high-density lipoprotein-cholesterol (HDL), and low-density lipoprotein-cholesterol (LDL), and serum glucose levels, compared to the HFD group. Moreover, ALM16 significantly ameliorated the HFD-induced increased hepatic injury markers, including aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), lactate dehydrogenase (LDH), and gamma-glutamyltransferase (GGT)-1.0 Commenti 0 condivisioni 14 Views 0 AnteprimaEffettua l'accesso per mettere mi piace, condividere e commentare! -
01 days vs 8.22 days, P less then 0.001). https://www.selleckchem.com/ Finally, the cost of hospitalization was higher for weekday admissions versus weekend admissions ($18 072 vs $17 495, P less then 0.001). Conclusion Our results showed a similar LOS and cost associated with the management of exacerbations on the weekend compared to weekdays. While many high-risk conditions exhibit increased mortality and prolonged hospital course over the weekend, this phenomenon does not appear to affect IBD. These findings indicate efficient patient care on the weekend and can be utilized for logistical purposes such as resource allocation and procedure scheduling in the endoscopy suite. © 2019 The Authors. JGH Open An open access journal of gastroenterology and hepatology published by Journal of Gastroenterology and Hepatology Foundation and John Wiley & Sons Australia, Ltd.Background and Aim To determine the concordance of liver explants with the pretransplant diagnosis. Methods This was a retrospective analysis of 251 liver explants. Patient information included demography, comorbidity, and etiological diagnosis. Final diagnosis was based on morphological and histological findings. For non-alcoholic steatohepatitis (NASH) and cryptogenic cirrhosis, we investigated comorbid states such as obesity, hypertension, and diabetes. Chi square test and Cohen's Kappa value were used. A P value of less then 0.05 was considered significant. Results A total of 192 patients (76.5%) were males. A significant concordance of explant diagnosis with pretransplant diagnosis was present in 225 (89.6%) patients. It was 100% for alcohol-related disease, hepatitis B, hepatitis C, autoimmune (AI) liver disease, biliary cirrhosis, and Budd-Chiari syndrome. Of 37 patients with a pretransplant diagnosis of cryptogenic cirrhosis, major discordance was observed in 23 (62.1%). On explant, seven patients each had hemochromatosis 5 (13.5%), AI hepatitis, and NASH (18.9%); two had noncirrhotic fibrosis (5.4%); and one each had Wilson's disease and congenital hepatic fibrosis (2.7%). Of the 20 explants, 3 with pretransplant diagnosis of NASH had a diagnosis of cryptogenic cirrhosis on explant specimens. Cohen's Kappa for the concordance of pretransplant diagnosis and explant diagnosis in NASH and cryptogenic cirrhosis patients was 0.75 and 0.47, respectively. An incidental hepatocellular carcinoma was picked up in 16 explants, and 18 had granulomas. Conclusion Concordance between pretransplant and explant diagnosis is lower for NASH and cryptogenic cirrhosis. The true prevalence of cryptogenic cirrhosis in our study was 5.6%. © 2019 The Authors. JGH Open An open access journal of gastroenterology and hepatology published by Journal of Gastroenterology and Hepatology Foundation and John Wiley & Sons Australia, Ltd.Background and Aim Chronic hemodialysis patients are at high risk of contracting hepatitis B (HBV) and C (HCV) virus infections. In Vietnam, the seroprevalence of HBV and HCV infections is approximately 10 and 4%, respectively. Although the chronic hemodialysis population is increasing, relatively little epidemiology is available for HBV and HCV infections in this population. To address this, we reviewed the current literature on the magnitude of these infections in the hemodialysis population in Vietnam. Methods Four databases were used to search for publications containing the prevalence of HBV and/or HCV infections in hemodialysis patients in Vietnam. Grey literature search was utilized to identify local publications. Prevalence and 95% confidence interval were used or calculated, and a meta-analysis was conducted on HBV and HCV prevalence for comparison. Results Sixteen studies were included in the review. The search identified knowledge gaps in the current literature. Available data show that HBV and HCV infections remain prevalent in the hemodialysis population. HBV prevalence is not different between the north and the south of Vietnam. The pattern of HCV prevalence is different, with recent reports of lower prevalence in the south than in the north, while HCV prevalence varies between hemodialysis units in the same regions. Conclusions A national prevalence survey of hemodialysis patients would improve the reliability and generalizability of the findings. However, the review confirmed that both HBV and HCV were prevalent in hemodialysis patients. The findings support a reinforcement of infection prevention to minimize the risk of HBV and HCV transmission in hemodialysis facilities. © 2019 The Authors. JGH Open An open access journal of gastroenterology and hepatology published by Journal of Gastroenterology and Hepatology Foundation and John Wiley & Sons Australia, Ltd.Background and Aim Prophylactic endotracheal intubation for airway protection prior to endoscopy for the management of severe upper gastrointestinal bleeding (UGIB) is controversial. The aim of this meta-analysis is to examine the clinical outcomes and costs related to prophylactic endotracheal intubation compared to no intubation in UGIB. Methods EMBASE, MEDLINE, and the Cochrane Central Register of Controlled Trials were used to identify studies through June 2017. Data regarding mortality, total hospital and intensive care unit length of stay (LOS), pneumonia, and cardiovascular events were collected. The DerSimonian-Laird random effects models were used to calculate the inverse variance-based weighted, pooled treatment effect across studies. Results Seven studies (five manuscripts and two abstracts) were identified (5662 total patients). Prophylactic intubation conferred an increased risk of death (odds ratio [OR], 2.59, 95% confidence interval [CI] 1.01-6.64), hospital LOS (mean difference, 0.96 days, 95% CI 0.26-1.67), and pneumonia (OR 6.58, 95% CI 4.91-8.81]) compared to endoscopy without intubation. The LOS-related cost was greater when prophylactic intubation was performed ($9020 per patient, 95% CI $6962-10 609) compared to when it was not performed ($7510 per patient, 95% CI $6486-8432). There was no difference in risk of cardiovascular events after sensitivity analysis. Conclusion Prophylactic intubation in severe UGIB is associated with a greater risk of pneumonia, LOS, death, and cost compared to endoscopy without intubation. Randomized trials examining this issue are warranted. © 2019 The Authors. JGH Open An open access journal of gastroenterology and hepatology published by Journal of Gastroenterology and Hepatology Foundation and John Wiley & Sons Australia, Ltd.
01 days vs 8.22 days, P less then 0.001). https://www.selleckchem.com/ Finally, the cost of hospitalization was higher for weekday admissions versus weekend admissions ($18 072 vs $17 495, P less then 0.001). Conclusion Our results showed a similar LOS and cost associated with the management of exacerbations on the weekend compared to weekdays. While many high-risk conditions exhibit increased mortality and prolonged hospital course over the weekend, this phenomenon does not appear to affect IBD. These findings indicate efficient patient care on the weekend and can be utilized for logistical purposes such as resource allocation and procedure scheduling in the endoscopy suite. © 2019 The Authors. JGH Open An open access journal of gastroenterology and hepatology published by Journal of Gastroenterology and Hepatology Foundation and John Wiley & Sons Australia, Ltd.Background and Aim To determine the concordance of liver explants with the pretransplant diagnosis. Methods This was a retrospective analysis of 251 liver explants. Patient information included demography, comorbidity, and etiological diagnosis. Final diagnosis was based on morphological and histological findings. For non-alcoholic steatohepatitis (NASH) and cryptogenic cirrhosis, we investigated comorbid states such as obesity, hypertension, and diabetes. Chi square test and Cohen's Kappa value were used. A P value of less then 0.05 was considered significant. Results A total of 192 patients (76.5%) were males. A significant concordance of explant diagnosis with pretransplant diagnosis was present in 225 (89.6%) patients. It was 100% for alcohol-related disease, hepatitis B, hepatitis C, autoimmune (AI) liver disease, biliary cirrhosis, and Budd-Chiari syndrome. Of 37 patients with a pretransplant diagnosis of cryptogenic cirrhosis, major discordance was observed in 23 (62.1%). On explant, seven patients each had hemochromatosis 5 (13.5%), AI hepatitis, and NASH (18.9%); two had noncirrhotic fibrosis (5.4%); and one each had Wilson's disease and congenital hepatic fibrosis (2.7%). Of the 20 explants, 3 with pretransplant diagnosis of NASH had a diagnosis of cryptogenic cirrhosis on explant specimens. Cohen's Kappa for the concordance of pretransplant diagnosis and explant diagnosis in NASH and cryptogenic cirrhosis patients was 0.75 and 0.47, respectively. An incidental hepatocellular carcinoma was picked up in 16 explants, and 18 had granulomas. Conclusion Concordance between pretransplant and explant diagnosis is lower for NASH and cryptogenic cirrhosis. The true prevalence of cryptogenic cirrhosis in our study was 5.6%. © 2019 The Authors. JGH Open An open access journal of gastroenterology and hepatology published by Journal of Gastroenterology and Hepatology Foundation and John Wiley & Sons Australia, Ltd.Background and Aim Chronic hemodialysis patients are at high risk of contracting hepatitis B (HBV) and C (HCV) virus infections. In Vietnam, the seroprevalence of HBV and HCV infections is approximately 10 and 4%, respectively. Although the chronic hemodialysis population is increasing, relatively little epidemiology is available for HBV and HCV infections in this population. To address this, we reviewed the current literature on the magnitude of these infections in the hemodialysis population in Vietnam. Methods Four databases were used to search for publications containing the prevalence of HBV and/or HCV infections in hemodialysis patients in Vietnam. Grey literature search was utilized to identify local publications. Prevalence and 95% confidence interval were used or calculated, and a meta-analysis was conducted on HBV and HCV prevalence for comparison. Results Sixteen studies were included in the review. The search identified knowledge gaps in the current literature. Available data show that HBV and HCV infections remain prevalent in the hemodialysis population. HBV prevalence is not different between the north and the south of Vietnam. The pattern of HCV prevalence is different, with recent reports of lower prevalence in the south than in the north, while HCV prevalence varies between hemodialysis units in the same regions. Conclusions A national prevalence survey of hemodialysis patients would improve the reliability and generalizability of the findings. However, the review confirmed that both HBV and HCV were prevalent in hemodialysis patients. The findings support a reinforcement of infection prevention to minimize the risk of HBV and HCV transmission in hemodialysis facilities. © 2019 The Authors. JGH Open An open access journal of gastroenterology and hepatology published by Journal of Gastroenterology and Hepatology Foundation and John Wiley & Sons Australia, Ltd.Background and Aim Prophylactic endotracheal intubation for airway protection prior to endoscopy for the management of severe upper gastrointestinal bleeding (UGIB) is controversial. The aim of this meta-analysis is to examine the clinical outcomes and costs related to prophylactic endotracheal intubation compared to no intubation in UGIB. Methods EMBASE, MEDLINE, and the Cochrane Central Register of Controlled Trials were used to identify studies through June 2017. Data regarding mortality, total hospital and intensive care unit length of stay (LOS), pneumonia, and cardiovascular events were collected. The DerSimonian-Laird random effects models were used to calculate the inverse variance-based weighted, pooled treatment effect across studies. Results Seven studies (five manuscripts and two abstracts) were identified (5662 total patients). Prophylactic intubation conferred an increased risk of death (odds ratio [OR], 2.59, 95% confidence interval [CI] 1.01-6.64), hospital LOS (mean difference, 0.96 days, 95% CI 0.26-1.67), and pneumonia (OR 6.58, 95% CI 4.91-8.81]) compared to endoscopy without intubation. The LOS-related cost was greater when prophylactic intubation was performed ($9020 per patient, 95% CI $6962-10 609) compared to when it was not performed ($7510 per patient, 95% CI $6486-8432). There was no difference in risk of cardiovascular events after sensitivity analysis. Conclusion Prophylactic intubation in severe UGIB is associated with a greater risk of pneumonia, LOS, death, and cost compared to endoscopy without intubation. Randomized trials examining this issue are warranted. © 2019 The Authors. JGH Open An open access journal of gastroenterology and hepatology published by Journal of Gastroenterology and Hepatology Foundation and John Wiley & Sons Australia, Ltd.0 Commenti 0 condivisioni 25 Views 0 Anteprima -
FFA demonstrated significant upregulation of Th1/IFN (e.g. IFN-, CXCL9/CXCL10), JAK-STAT pathway (STAT1, JAK3), and fibrosis-related products (vimentin, fibronectin; p less then 0.05 for all), with no concomitant downregulation of hair keratins and the T-regulatory marker, FOXP3, which were decreased in AA. The stem cell markers CD200 and K15 demonstrated significantly reduced expression only in FFA (p less then 0.05). CONCLUSION These data suggest that follicular damage and loss of stem cells in FFA may be mediated through immune attack in the bulge region, with secondary fibrosis and reduced but still detectable stem cells. JAK/STAT-targeting treatments may be able to prevent permanent follicular destruction and fibrosis in early disease stages. This article is protected by copyright. All rights reserved.OBJECTIVE Ovine footrot is a contagious bacterial disease that reduces meat and wool production and can trigger on-farm quarantine in New South Wales. Field diagnosis is based on the prevalence and severity of foot lesions, environmental conditions and flock history. The study evaluated whether a PCR assay or gelatin gel test for virulence in Dichelobacter nodosus isolated from hoof material could aid in the clinical diagnosis of virulent footrot. METHODS A quantitative polymerase chain reaction (qPCR) used for diagnosis of virulent footrot in some Australian states was evaluated on 218 hoof swabs taken from 44 sheep flocks from 36 NSW properties, quantifying both the aprV2 positive and aprB2 positive acidic protease genotypes of D. nodosus. DESIGN The same flocks/swabs were used to evaluate test agreement between the aprV2/B2 qPCR and the gelatin gel test, and a multiple logistic regression was used to identify factors critical for field diagnosis of virulent footrot. RESULTS Only fair to moderate agreement (kappa test) and significant disagreement (McNemar's) was shown between the gelatin gel test and the ratio of aprV2 positive to total D. nodosus. The proportion of aprV2 positive D. nodosus was not significantly different between foot lesions scores of increasing severity. Field diagnosis of virulent footrot was best explained by the prevalence of score 4 and 5 lesions, wet and warm environmental conditions, and recent footrot diagnosis. CONCLUSION Although the apr2 gene could differentiate between benign and virulent strains of D. nodosus, the apr2 qPCR was of minimal use for field diagnosis of virulent footrot, where disease expression relies on host genetics, immunity and environmental conditions. © 2020 Australian Veterinary Association.There is a large and growing interest in non-consumptive effects of predators. Diverse and extensive evidence shows that predation risk directly influences prey traits, such as behaviour, morphology, and physiology, which in-turn, may cause a reduction in prey fitness components (i.e., growth rate, survival, and reproduction). An intuitive expectation is that non-consumptive effects that reduce prey fitness will extend to alter population growth rate and therefore population size. However, our intensive literature search yielded only 10 studies that examined how predator-induced changes in prey traits translate to changes in prey population size. Further, the scant evidence for risk-induced changes on prey population size have been generated from studies that were performed in very controlled systems (mesocosm and laboratory), which do not have the complexity and feedbacks of natural settings. Thus, although likely that predation risk alone can alter prey population size, there is little direct empirical evidntal context interacts with predation risk and prey responses. We highlight the critical need to appreciate risk effects at each level in the chain of events, and that changes at one level cannot be assumed to translate into changes in the next because of the interplay between risk, prey responses, and the environment. The gaps in knowledge we illuminate underscore the need for more evidence to substantiate the claim that predation risk effects extend to prey population size. The lacunae we identify should inspire future studies on the impact of predation risk on population-level responses in free-living animals. This article is protected by copyright. All rights reserved.Cervical spondylotic myelopathy (CSM) is a common cause of disability with few treatments. Aberrant mitochondrial dynamics play a crucial role in the pathogenesis of various neurodegenerative diseases. Thus, regulation of mitochondrial dynamics may offer therapeutic benefit for the treatment of CSM. Muscone, the active ingredient of an odoriferous animal product, exhibits anti-inflammatory and neuroprotective effects for which the underlying mechanisms remain obscure. We hypothesized that muscone might ameliorate inflammatory responses and neuronal damage by regulating mitochondrial dynamics. https://www.selleckchem.com/products/ory-1001-rg-6016.html To this end, the effects of muscone on a rat model of chronic cervical cord compression, as well as activated BV2 cells and injured neurons, were assessed. The results showed that muscone intervention improved motor function compared with vehicle-treated rats. Indeed, muscone attenuated pro-inflammatory cytokine expression, neuronal-apoptosis indicators in the lesion area, and activation of the nod-like receptor family pyrin domain-containing 3 inflammasome, nuclear transcription factor-κB, and dynamin-related protein 1 in Iba1- and βIII-tubulin-labeled cells. Compared with vehicle-treated rats, compression sites of muscone-treated animals exhibited elongated mitochondrial morphologies in individual cell types and reduced reactive oxygen species. In vitro results indicated that muscone suppressed microglial activation and neuronal damage by regulating related-inflammatory or apoptotic molecules. Moreover, muscone inhibited dynamin-related protein 1 activation in activated BV2 cells and injured neurons, whereby it rescued mitochondrial fragmentation and reactive oxygen species production, which regulate a wide range of inflammatory and apoptotic molecules. Our findings reveal that muscone attenuates neuroinflammation and neuronal damage in rats with chronic cervical cord compression by regulating mitochondrial fission events, suggesting its promise for CSM therapy. This article is protected by copyright. All rights reserved.
FFA demonstrated significant upregulation of Th1/IFN (e.g. IFN-, CXCL9/CXCL10), JAK-STAT pathway (STAT1, JAK3), and fibrosis-related products (vimentin, fibronectin; p less then 0.05 for all), with no concomitant downregulation of hair keratins and the T-regulatory marker, FOXP3, which were decreased in AA. The stem cell markers CD200 and K15 demonstrated significantly reduced expression only in FFA (p less then 0.05). CONCLUSION These data suggest that follicular damage and loss of stem cells in FFA may be mediated through immune attack in the bulge region, with secondary fibrosis and reduced but still detectable stem cells. JAK/STAT-targeting treatments may be able to prevent permanent follicular destruction and fibrosis in early disease stages. This article is protected by copyright. All rights reserved.OBJECTIVE Ovine footrot is a contagious bacterial disease that reduces meat and wool production and can trigger on-farm quarantine in New South Wales. Field diagnosis is based on the prevalence and severity of foot lesions, environmental conditions and flock history. The study evaluated whether a PCR assay or gelatin gel test for virulence in Dichelobacter nodosus isolated from hoof material could aid in the clinical diagnosis of virulent footrot. METHODS A quantitative polymerase chain reaction (qPCR) used for diagnosis of virulent footrot in some Australian states was evaluated on 218 hoof swabs taken from 44 sheep flocks from 36 NSW properties, quantifying both the aprV2 positive and aprB2 positive acidic protease genotypes of D. nodosus. DESIGN The same flocks/swabs were used to evaluate test agreement between the aprV2/B2 qPCR and the gelatin gel test, and a multiple logistic regression was used to identify factors critical for field diagnosis of virulent footrot. RESULTS Only fair to moderate agreement (kappa test) and significant disagreement (McNemar's) was shown between the gelatin gel test and the ratio of aprV2 positive to total D. nodosus. The proportion of aprV2 positive D. nodosus was not significantly different between foot lesions scores of increasing severity. Field diagnosis of virulent footrot was best explained by the prevalence of score 4 and 5 lesions, wet and warm environmental conditions, and recent footrot diagnosis. CONCLUSION Although the apr2 gene could differentiate between benign and virulent strains of D. nodosus, the apr2 qPCR was of minimal use for field diagnosis of virulent footrot, where disease expression relies on host genetics, immunity and environmental conditions. © 2020 Australian Veterinary Association.There is a large and growing interest in non-consumptive effects of predators. Diverse and extensive evidence shows that predation risk directly influences prey traits, such as behaviour, morphology, and physiology, which in-turn, may cause a reduction in prey fitness components (i.e., growth rate, survival, and reproduction). An intuitive expectation is that non-consumptive effects that reduce prey fitness will extend to alter population growth rate and therefore population size. However, our intensive literature search yielded only 10 studies that examined how predator-induced changes in prey traits translate to changes in prey population size. Further, the scant evidence for risk-induced changes on prey population size have been generated from studies that were performed in very controlled systems (mesocosm and laboratory), which do not have the complexity and feedbacks of natural settings. Thus, although likely that predation risk alone can alter prey population size, there is little direct empirical evidntal context interacts with predation risk and prey responses. We highlight the critical need to appreciate risk effects at each level in the chain of events, and that changes at one level cannot be assumed to translate into changes in the next because of the interplay between risk, prey responses, and the environment. The gaps in knowledge we illuminate underscore the need for more evidence to substantiate the claim that predation risk effects extend to prey population size. The lacunae we identify should inspire future studies on the impact of predation risk on population-level responses in free-living animals. This article is protected by copyright. All rights reserved.Cervical spondylotic myelopathy (CSM) is a common cause of disability with few treatments. Aberrant mitochondrial dynamics play a crucial role in the pathogenesis of various neurodegenerative diseases. Thus, regulation of mitochondrial dynamics may offer therapeutic benefit for the treatment of CSM. Muscone, the active ingredient of an odoriferous animal product, exhibits anti-inflammatory and neuroprotective effects for which the underlying mechanisms remain obscure. We hypothesized that muscone might ameliorate inflammatory responses and neuronal damage by regulating mitochondrial dynamics. https://www.selleckchem.com/products/ory-1001-rg-6016.html To this end, the effects of muscone on a rat model of chronic cervical cord compression, as well as activated BV2 cells and injured neurons, were assessed. The results showed that muscone intervention improved motor function compared with vehicle-treated rats. Indeed, muscone attenuated pro-inflammatory cytokine expression, neuronal-apoptosis indicators in the lesion area, and activation of the nod-like receptor family pyrin domain-containing 3 inflammasome, nuclear transcription factor-κB, and dynamin-related protein 1 in Iba1- and βIII-tubulin-labeled cells. Compared with vehicle-treated rats, compression sites of muscone-treated animals exhibited elongated mitochondrial morphologies in individual cell types and reduced reactive oxygen species. In vitro results indicated that muscone suppressed microglial activation and neuronal damage by regulating related-inflammatory or apoptotic molecules. Moreover, muscone inhibited dynamin-related protein 1 activation in activated BV2 cells and injured neurons, whereby it rescued mitochondrial fragmentation and reactive oxygen species production, which regulate a wide range of inflammatory and apoptotic molecules. Our findings reveal that muscone attenuates neuroinflammation and neuronal damage in rats with chronic cervical cord compression by regulating mitochondrial fission events, suggesting its promise for CSM therapy. This article is protected by copyright. All rights reserved.0 Commenti 0 condivisioni 14 Views 0 Anteprima -
OBJECTIVE The aim of this study was to detect the expressions of serum micro-ribonucleic acid (miR)-26b and miR-21 in ovarian cancer patients, and to explore their associations with the diagnosis, clinicopathological parameters and prognosis of ovarian cancer. PATIENTS AND METHODS A total of 86 patients diagnosed with ovarian cancer in our hospital from January 2014 to January 2015 were enrolled in the observation group. Meanwhile, another 86 subjects receiving physical examination in our hospital during the same period were enrolled in the control group. The expressions of serum miR-26b and miR-21 in both groups were detected via Real Time fluorescence-quantitative Polymerase Chain Reaction (RT-qPCR). Receiver operating characteristic (ROC) curves were plotted. Later, the clinical diagnostic value of combined detection of miR-26b and miR-21 in ovarian cancer was analyzed. Moreover, the associations of serum miR-26b and miR-21 expressions with clinicopathological characteristics and prognosis of ovarian cancerum miR-26b. However, the 3-year survival rate of patients with low expression of serum miR-21 was higher than that in those with high expression. CONCLUSIONS MiR-21 is highly expressed, while miR-26b is lowly expressed in the serum of ovarian cancer patients. Both of them may be involved in the incidence and development of ovarian cancer. https://www.selleckchem.com/products/tpca-1.html Furthermore, combined monitoring of serum miR-26b and miR-21 has a certain value in the clinical diagnosis and treatment of ovarian cancer.OBJECTIVE Ovarian cancer is prone to chemoresistance, leading to poor outcomes in patients. MicroRNA 1301 plays a regulatory role in multiple tumors. However, whether microRNA 1301 regulates cisplatin resistance in ovarian cancer cells remains unclear. MATERIALS AND METHODS The ovarian cancer SKOV3 cell line and the human ovarian cancer cisplatin-resistant strain cell SKOV3/DDP were cultured in vitro and microRNA1301 expression was analyzed by Real time PCR. MicroRNA1301 mimics and microRNA 1301 were transfected into SKOV3/DDP, respectively followed by analysis of cell proliferation by MTT assay, cell invasion, expression of autophagy genes ATG5 and Beclin1 and EMT-related transcription factors Snail and Slug by Real time PCR, expression of NF-κB and E-cadherin and N-cadherin by Western blot. RESULTS MicroRNA 1301 expression was significantly increased in SKOV3/DDP cells compared with that in SKOV3 cells (p less then 0.05). MicroRNA1301 mimics transfection into SKOV3/DDP up-regulated microRNA1301 expression, promoted cell proliferation, and invasion, inhibited ATG5 and Beclin1 expression, and promoted Snail and Slug expression, decreased E-cadherin expression and increased N-cadherin and NF-κB expression, compared with the control group, the differences were statistically significant (p less then 0.05). MicroRNA1301 inhibitor transfection into SKOV3/DDP cells could down-regulate the expression of microRNA1301 and significantly reversed the above changes. Compared with the control group, differences were statistically significant (p less then 0.05). CONCLUSIONS Targeting microRNA1301 can inhibit the proliferation of cisplatin-resistant cells and the development of EMT in human ovarian cancer cells by inhibiting the NF-κB signaling pathway, thereby inhibiting the occurrence and development of drug-resistant ovarian cancer.OBJECTIVE To investigate the biological effect of long non-coding ribonucleic acid (lncRNA) lung cancer-associated transcript 1 (LUCAT1) in the development of ovarian cancer. MATERIALS AND METHODS Real-time quantitative polymerase chain reaction (RT-qPCR) was utilized to detect the expression levels of lncRNA LUCAT1 in three human ovarian cancer cell lines (CaoV-3, SK-OV-3 and HO-8910) and the normal human ovarian surface epithelial cell line (IOSE80). Small interfering RNAs against lncRNA LUCAT1 (si-LUCAT1) were transfected into SK-OV-3 cells. Transfection efficiency of si-LUCAT1 was verified via RT-qPCR. Cell Counting Kit-8 (CCK-8) and colony formation assays were performed to test the effect of silencing lncRNA LUCAT1 on SK-OV-3 cell proliferation. The apoptosis was measured by flow cytometry. The miRcode database was searched to predict potential microRNAs (miRNAs) binding lncRNA LUCAT1. It was found that lncRNA LUCAT1 contained a highly conserved binding site of miR-199a-5p in the 3'-untranslated region ile that of LUCAT1-*** was unchangeable. Further analysis via RT-qPCR suggested that miR-199a-5p overexpression significantly decreased the expression level of lncRNA LUCAT1 (p less then 0.05). CONCLUSIONS LncRNA LUCAT1 is overexpressed in ovarian cancer cells, which may target miR-199a-5p to exert its effects on driving the malignant development of ovarian cancer.OBJECTIVE To explore the regulatory mechanism of lncRNA NORAD on proliferation and invasion of ovarian cancer cells through miR-199a-3p. PATIENTS AND METHODS Eighty-six ovarian cancer tissues and 86 tissues adjacent to cancer, human ovarian cancer cell lines SKOV3, HO-8910, A2780, OVCAR-3, and human normal ovarian epithelial cell line IOSE80 were collected. MiR-199a-3p-mimics, miR-199a-3p-inhibitor, miR-NC, si-NORAD, Sh-NORAD, and NC were transfected into HO-8910 and A2780 cells, the expression levels of lncRNA NORAD and miR-199a-3p in ovarian cancer tissues and cells were detected by qRT-PCR, and the expression levels of N-cadherin, E-cadherin, and vimentin in cells were detected by WB. Cell Counting Kit-8 (CCK-8), transwell, and cell scratch tests were used to detect proliferation, invasion, and migration of cells, and the relationship between lncRNA NORAD and miR-199a-3p was confirmed by the Dual-Luciferase reporter assay. RESULTS LncRNA NORAD was highly expressed and miR-199a-3p was lowly expressed in ovarian cancer, and the expression levels of LNCRNARAD and miR-199a-3p were negatively correlated. Cell experiments showed that inhibiting the expression of lncRNA NORAD or up-regulating the expression of miR-199a-3p could inhibit the proliferation, invasion, migration, and EMT of ovarian cancer cells, while up-regulating the expression of lncRNA NORAD or inhibiting the expression of miR-199a-3p could promote their proliferation, invasion, migration, and EMT. Dual-Luciferase reporter assay confirmed that there was a regulatory relationship between lncRNA NORAD and miR-199a-3p. CONCLUSIONS LncRNA NORAD was highly expressed in ovarian cancer tissues, while silencing lncRNA NORAD expression could inhibit the proliferation, invasion, migration, and EMT of ovarian cancer cells by regulating miR-199a-3p, which might be a new target for the diagnosis and treatment of ovarian cancer.
OBJECTIVE The aim of this study was to detect the expressions of serum micro-ribonucleic acid (miR)-26b and miR-21 in ovarian cancer patients, and to explore their associations with the diagnosis, clinicopathological parameters and prognosis of ovarian cancer. PATIENTS AND METHODS A total of 86 patients diagnosed with ovarian cancer in our hospital from January 2014 to January 2015 were enrolled in the observation group. Meanwhile, another 86 subjects receiving physical examination in our hospital during the same period were enrolled in the control group. The expressions of serum miR-26b and miR-21 in both groups were detected via Real Time fluorescence-quantitative Polymerase Chain Reaction (RT-qPCR). Receiver operating characteristic (ROC) curves were plotted. Later, the clinical diagnostic value of combined detection of miR-26b and miR-21 in ovarian cancer was analyzed. Moreover, the associations of serum miR-26b and miR-21 expressions with clinicopathological characteristics and prognosis of ovarian cancerum miR-26b. However, the 3-year survival rate of patients with low expression of serum miR-21 was higher than that in those with high expression. CONCLUSIONS MiR-21 is highly expressed, while miR-26b is lowly expressed in the serum of ovarian cancer patients. Both of them may be involved in the incidence and development of ovarian cancer. https://www.selleckchem.com/products/tpca-1.html Furthermore, combined monitoring of serum miR-26b and miR-21 has a certain value in the clinical diagnosis and treatment of ovarian cancer.OBJECTIVE Ovarian cancer is prone to chemoresistance, leading to poor outcomes in patients. MicroRNA 1301 plays a regulatory role in multiple tumors. However, whether microRNA 1301 regulates cisplatin resistance in ovarian cancer cells remains unclear. MATERIALS AND METHODS The ovarian cancer SKOV3 cell line and the human ovarian cancer cisplatin-resistant strain cell SKOV3/DDP were cultured in vitro and microRNA1301 expression was analyzed by Real time PCR. MicroRNA1301 mimics and microRNA 1301 were transfected into SKOV3/DDP, respectively followed by analysis of cell proliferation by MTT assay, cell invasion, expression of autophagy genes ATG5 and Beclin1 and EMT-related transcription factors Snail and Slug by Real time PCR, expression of NF-κB and E-cadherin and N-cadherin by Western blot. RESULTS MicroRNA 1301 expression was significantly increased in SKOV3/DDP cells compared with that in SKOV3 cells (p less then 0.05). MicroRNA1301 mimics transfection into SKOV3/DDP up-regulated microRNA1301 expression, promoted cell proliferation, and invasion, inhibited ATG5 and Beclin1 expression, and promoted Snail and Slug expression, decreased E-cadherin expression and increased N-cadherin and NF-κB expression, compared with the control group, the differences were statistically significant (p less then 0.05). MicroRNA1301 inhibitor transfection into SKOV3/DDP cells could down-regulate the expression of microRNA1301 and significantly reversed the above changes. Compared with the control group, differences were statistically significant (p less then 0.05). CONCLUSIONS Targeting microRNA1301 can inhibit the proliferation of cisplatin-resistant cells and the development of EMT in human ovarian cancer cells by inhibiting the NF-κB signaling pathway, thereby inhibiting the occurrence and development of drug-resistant ovarian cancer.OBJECTIVE To investigate the biological effect of long non-coding ribonucleic acid (lncRNA) lung cancer-associated transcript 1 (LUCAT1) in the development of ovarian cancer. MATERIALS AND METHODS Real-time quantitative polymerase chain reaction (RT-qPCR) was utilized to detect the expression levels of lncRNA LUCAT1 in three human ovarian cancer cell lines (CaoV-3, SK-OV-3 and HO-8910) and the normal human ovarian surface epithelial cell line (IOSE80). Small interfering RNAs against lncRNA LUCAT1 (si-LUCAT1) were transfected into SK-OV-3 cells. Transfection efficiency of si-LUCAT1 was verified via RT-qPCR. Cell Counting Kit-8 (CCK-8) and colony formation assays were performed to test the effect of silencing lncRNA LUCAT1 on SK-OV-3 cell proliferation. The apoptosis was measured by flow cytometry. The miRcode database was searched to predict potential microRNAs (miRNAs) binding lncRNA LUCAT1. It was found that lncRNA LUCAT1 contained a highly conserved binding site of miR-199a-5p in the 3'-untranslated region ile that of LUCAT1-mut was unchangeable. Further analysis via RT-qPCR suggested that miR-199a-5p overexpression significantly decreased the expression level of lncRNA LUCAT1 (p less then 0.05). CONCLUSIONS LncRNA LUCAT1 is overexpressed in ovarian cancer cells, which may target miR-199a-5p to exert its effects on driving the malignant development of ovarian cancer.OBJECTIVE To explore the regulatory mechanism of lncRNA NORAD on proliferation and invasion of ovarian cancer cells through miR-199a-3p. PATIENTS AND METHODS Eighty-six ovarian cancer tissues and 86 tissues adjacent to cancer, human ovarian cancer cell lines SKOV3, HO-8910, A2780, OVCAR-3, and human normal ovarian epithelial cell line IOSE80 were collected. MiR-199a-3p-mimics, miR-199a-3p-inhibitor, miR-NC, si-NORAD, Sh-NORAD, and NC were transfected into HO-8910 and A2780 cells, the expression levels of lncRNA NORAD and miR-199a-3p in ovarian cancer tissues and cells were detected by qRT-PCR, and the expression levels of N-cadherin, E-cadherin, and vimentin in cells were detected by WB. Cell Counting Kit-8 (CCK-8), transwell, and cell scratch tests were used to detect proliferation, invasion, and migration of cells, and the relationship between lncRNA NORAD and miR-199a-3p was confirmed by the Dual-Luciferase reporter assay. RESULTS LncRNA NORAD was highly expressed and miR-199a-3p was lowly expressed in ovarian cancer, and the expression levels of LNCRNARAD and miR-199a-3p were negatively correlated. Cell experiments showed that inhibiting the expression of lncRNA NORAD or up-regulating the expression of miR-199a-3p could inhibit the proliferation, invasion, migration, and EMT of ovarian cancer cells, while up-regulating the expression of lncRNA NORAD or inhibiting the expression of miR-199a-3p could promote their proliferation, invasion, migration, and EMT. Dual-Luciferase reporter assay confirmed that there was a regulatory relationship between lncRNA NORAD and miR-199a-3p. CONCLUSIONS LncRNA NORAD was highly expressed in ovarian cancer tissues, while silencing lncRNA NORAD expression could inhibit the proliferation, invasion, migration, and EMT of ovarian cancer cells by regulating miR-199a-3p, which might be a new target for the diagnosis and treatment of ovarian cancer.0 Commenti 0 condivisioni 24 Views 0 Anteprima -
Different percolation tests were developed worldwide to characterize the leaching and to evaluate the environmental compatibility of granular materials. The German standard up-flow percolation test has a short testing time and can be used for both coarse and fine-grain materials. Some very fine-grain materials are difficult to percolate. According to the standard, admixture of 80% quartz sand (20% material) can be used for cohesive materials. It is assumed that equilibrium concentrations are reached and therefore the sand does not cause any interfering processes. However, the 80% sand admixture cannot be used for coarse materials due to dilution. A standardized sand admixture for both coarse and fine-grain materials is beneficial for the routine of laboratories. The sand admixture has the further advantage that it reduces the testing time. The experimental and the analysis procedures of the German standard were checked, specified, and optimized. An admixture of 50% sand is a good compromise for cohesive and coarse materials. The statistical variations of heavy metal and polycyclic aromatic hydrocarbons from the optimized test with and without sand admixture were determined with an 8-fold intralaboratory and an interlaboratory test. Then the sand admixture was validated for 16 materials (soils, demolition wastes, ashes and other industrial wastes). In this study, the feasibility of using municipal solid waste incineration fly ash (MSWIFA) as additive for the strengthening of pretreated cement-stabilized soil was evaluated. Results indicated that the leaching concentrations of chromium and lead in MSWIFA after the water washing process and addition of 4% ferrous sulphate were reduced by 67% and 89%, respectively, which was lower than the limit value of Identification standard for hazardous waste (GB 5085.3-2007). After pretreatment, MSWIFA samples with ratios of 5% and 10% were blended into cement-stabilized soil with ordinary Portland cement (OPC) content of 10%, 15% and 20%. The unconfined compressive strength (UCS), internal friction angle and cohesion of the cement-stabilized soil increased with OPC and pretreated MSWIFA (PFA) content. The same effect was observed on UCS after the addition of 10% PFA as replacement of 5% OPC. In the subsequent X-ray powder diffraction test, scanning electron microscopy and leaching tests, the leaching concentrations of heavy metals in cement-stabilized soil became far lower than the limit value under the synergistic effects of the physical encapsulation of hydration products and stabilization of chemical agents. The incorporation of PFA as a supplementary material can effectively accelerate the formation of hydration products and can thus provide cleaner options for foundation reinforcement. The release of potentially toxic elements as airborne fine particulates is a significant environmental risk associated with recycling e-waste. Some of these may redeposit near emission sites or be transported over long distances causing wide-spread pollution. With an aim to identify key factors affecting particulate emissions, we report novel investigations on the adsorptive capture of particulate matter (PM) released during low temperature pyrolysis (600 °C; 15 min) of waste printed circuit boards (PCBs). https://www.selleckchem.com/products/ndi-091143.html A significant proportion of the released particulates (5.3 to 37%) were captured by adsorbents located downstream and in close proximity to the emitting source. Data was collected for four different PCBs and three adsorbents alumina, silica-gel and activated carbon. With sizes ranging from nanoparticles to over 10 µm, adsorbed particulates were present as fines, spheres, oblongs, clusters and larger particles with no specific shape. Of the 24 elements identified initially in waste PCBs, only 14 were detected in released particulates major PTEs- Zn, Sn, Pb and Cu (up to 400 ppm); minor PTEs- Ni, Mn, Cd, Cr and Ba (up to 10 ppm); trace PTEs- Co, In, Bi, Be and Sb (up to 1 ppm). Key factors influencing the release of PTEs during thermal processing were identified as basic elemental characteristics, densities, melting points, vapor pressures, initial concentrations, local bonding and mechanical strength. These results show that the presence of low melting point/high vapour pressure elements (Zn, Pb, Sn) should be minimised for a significant reduction in PTE emissions during e-waste processing. The recalcitrance of green waste, caused by its high lignocellulose content, is a technical challenge for accelerating green waste composting. Adjusting the initial ratio of total carbon and total nitrogen (TC/TN) to the optimal range of 25-301 is a common strategy to accelerate the composting process. However, because microorganisms can only utilize hydrosoluble nutrients directly, we investigated whether maintaining the ratio of hydrosoluble carbon and hydrosoluble nitrogen (HC/HN) within the optimal range through continuous urea addition can better accelerate green waste composting. We conducted a pilot-scale composting experiment, in which the aforementioned maintaining started at the beginning of composting, or after the thermophilic phase. The results demonstrate that maintaining the optimal HC/HN ratio starting at both periods can, to some extent, direct the TC/TN ratio toward 25-301, and can also significantly improve heat generation, pH, lignocellulose degradation, and humification. Moreover, lignin degradation was improved by 3.15-7.33%, cellulose degradation was improved by 6.48-8.15%, and carbon content of humus was increased by 7.19-16.13%. Although the maturity assessment showed that none of the final compost reached maturity within the limited experimental period (48 days), based on the promoted lignocellulose degradation and humification, we conclude that maintaining the HC/HN ratio within the optimal range is a more efficient method to accelerate green waste composting, compared to the initial TC/TN adjustment only once. Mycotoxins are metabolites secreted by certain types of moulds, and some of them can be harmful to health. The objective of this study was to estimate the level of exposure to airborne aflatoxin B1, ochratoxin A, gliotoxin and sterigmatocystin in waste recycling and recovery facilities. An additional goal was to assess the related health risks for workers. Targeted mycotoxins were analysed quantitatively in 94 air samples collected in five sites using ultra-performance liquid chromatography coupled with high resolution mass spectrometry. The level of exposure to mycotoxin during working day scenarios was compared to benchmark values, either health-based guidelines when available or the concentration of no toxicological concern (CoNTC) when not. Eleven per cent of samples showed quantifiable measurement results. Aflatoxin B1 and sterigmatocystin were quantified at the mechanical separation area in mechanical-biological treatment (MBT) facilities and in the materials recovery facility (MRF), but not in composting plants and composting units in MBT facilities.
Different percolation tests were developed worldwide to characterize the leaching and to evaluate the environmental compatibility of granular materials. The German standard up-flow percolation test has a short testing time and can be used for both coarse and fine-grain materials. Some very fine-grain materials are difficult to percolate. According to the standard, admixture of 80% quartz sand (20% material) can be used for cohesive materials. It is assumed that equilibrium concentrations are reached and therefore the sand does not cause any interfering processes. However, the 80% sand admixture cannot be used for coarse materials due to dilution. A standardized sand admixture for both coarse and fine-grain materials is beneficial for the routine of laboratories. The sand admixture has the further advantage that it reduces the testing time. The experimental and the analysis procedures of the German standard were checked, specified, and optimized. An admixture of 50% sand is a good compromise for cohesive and coarse materials. The statistical variations of heavy metal and polycyclic aromatic hydrocarbons from the optimized test with and without sand admixture were determined with an 8-fold intralaboratory and an interlaboratory test. Then the sand admixture was validated for 16 materials (soils, demolition wastes, ashes and other industrial wastes). In this study, the feasibility of using municipal solid waste incineration fly ash (MSWIFA) as additive for the strengthening of pretreated cement-stabilized soil was evaluated. Results indicated that the leaching concentrations of chromium and lead in MSWIFA after the water washing process and addition of 4% ferrous sulphate were reduced by 67% and 89%, respectively, which was lower than the limit value of Identification standard for hazardous waste (GB 5085.3-2007). After pretreatment, MSWIFA samples with ratios of 5% and 10% were blended into cement-stabilized soil with ordinary Portland cement (OPC) content of 10%, 15% and 20%. The unconfined compressive strength (UCS), internal friction angle and cohesion of the cement-stabilized soil increased with OPC and pretreated MSWIFA (PFA) content. The same effect was observed on UCS after the addition of 10% PFA as replacement of 5% OPC. In the subsequent X-ray powder diffraction test, scanning electron microscopy and leaching tests, the leaching concentrations of heavy metals in cement-stabilized soil became far lower than the limit value under the synergistic effects of the physical encapsulation of hydration products and stabilization of chemical agents. The incorporation of PFA as a supplementary material can effectively accelerate the formation of hydration products and can thus provide cleaner options for foundation reinforcement. The release of potentially toxic elements as airborne fine particulates is a significant environmental risk associated with recycling e-waste. Some of these may redeposit near emission sites or be transported over long distances causing wide-spread pollution. With an aim to identify key factors affecting particulate emissions, we report novel investigations on the adsorptive capture of particulate matter (PM) released during low temperature pyrolysis (600 °C; 15 min) of waste printed circuit boards (PCBs). https://www.selleckchem.com/products/ndi-091143.html A significant proportion of the released particulates (5.3 to 37%) were captured by adsorbents located downstream and in close proximity to the emitting source. Data was collected for four different PCBs and three adsorbents alumina, silica-gel and activated carbon. With sizes ranging from nanoparticles to over 10 µm, adsorbed particulates were present as fines, spheres, oblongs, clusters and larger particles with no specific shape. Of the 24 elements identified initially in waste PCBs, only 14 were detected in released particulates major PTEs- Zn, Sn, Pb and Cu (up to 400 ppm); minor PTEs- Ni, Mn, Cd, Cr and Ba (up to 10 ppm); trace PTEs- Co, In, Bi, Be and Sb (up to 1 ppm). Key factors influencing the release of PTEs during thermal processing were identified as basic elemental characteristics, densities, melting points, vapor pressures, initial concentrations, local bonding and mechanical strength. These results show that the presence of low melting point/high vapour pressure elements (Zn, Pb, Sn) should be minimised for a significant reduction in PTE emissions during e-waste processing. The recalcitrance of green waste, caused by its high lignocellulose content, is a technical challenge for accelerating green waste composting. Adjusting the initial ratio of total carbon and total nitrogen (TC/TN) to the optimal range of 25-301 is a common strategy to accelerate the composting process. However, because microorganisms can only utilize hydrosoluble nutrients directly, we investigated whether maintaining the ratio of hydrosoluble carbon and hydrosoluble nitrogen (HC/HN) within the optimal range through continuous urea addition can better accelerate green waste composting. We conducted a pilot-scale composting experiment, in which the aforementioned maintaining started at the beginning of composting, or after the thermophilic phase. The results demonstrate that maintaining the optimal HC/HN ratio starting at both periods can, to some extent, direct the TC/TN ratio toward 25-301, and can also significantly improve heat generation, pH, lignocellulose degradation, and humification. Moreover, lignin degradation was improved by 3.15-7.33%, cellulose degradation was improved by 6.48-8.15%, and carbon content of humus was increased by 7.19-16.13%. Although the maturity assessment showed that none of the final compost reached maturity within the limited experimental period (48 days), based on the promoted lignocellulose degradation and humification, we conclude that maintaining the HC/HN ratio within the optimal range is a more efficient method to accelerate green waste composting, compared to the initial TC/TN adjustment only once. Mycotoxins are metabolites secreted by certain types of moulds, and some of them can be harmful to health. The objective of this study was to estimate the level of exposure to airborne aflatoxin B1, ochratoxin A, gliotoxin and sterigmatocystin in waste recycling and recovery facilities. An additional goal was to assess the related health risks for workers. Targeted mycotoxins were analysed quantitatively in 94 air samples collected in five sites using ultra-performance liquid chromatography coupled with high resolution mass spectrometry. The level of exposure to mycotoxin during working day scenarios was compared to benchmark values, either health-based guidelines when available or the concentration of no toxicological concern (CoNTC) when not. Eleven per cent of samples showed quantifiable measurement results. Aflatoxin B1 and sterigmatocystin were quantified at the mechanical separation area in mechanical-biological treatment (MBT) facilities and in the materials recovery facility (MRF), but not in composting plants and composting units in MBT facilities.0 Commenti 0 condivisioni 14 Views 0 Anteprima -
It is well-known that axon growth can be stimulated by activated glial cells that fulfill a trophic function for regenerating nerves. For this reason, we evaluated the number of Nestin-GFP-positive cells that migrated from the DRG into the Matrigel in our 3D ex vivo explant model. We found that NGF and GDNF, but not BDNF, stimulated the migration of Nestin-GFP cells compared to the control (p less then 0.05). On the basis of the aforementioned finding, we concluded that GDNF had the greatest stimulating potential for axon regeneration, as it stimulated not only the axon outgrowth, but also glial cell migration. Although NGF significantly stimulated glial cell migration, its effect on axon growth was insufficient for axon regeneration.Mitochondrial dysfunction and failing mitochondrial quality control (MQC) are major determinants of aging. Far from being standalone organelles, mitochondria are intricately related with cellular other compartments, including lysosomes. The intimate relationship between mitochondria and lysosomes is reflected by the fact that lysosomal degradation of dysfunctional mitochondria is the final step of mitophagy. Inter-organelle membrane contact sites also allow bidirectional communication between mitochondria and lysosomes as part of nondegradative pathways. This interaction establishes a functional unit that regulates metabolic signaling, mitochondrial dynamics, and, hence, MQC. Contacts of mitochondria with the endoplasmic reticulum (ER) have also been described. ER-mitochondrial interactions are relevant to Ca2+ homeostasis, transfer of phospholipid precursors to mitochondria, and integration of apoptotic signaling. Many proteins involved in mitochondrial contact sites with other organelles also participate to degradative ****pathways. Hence, a comprehensive assessment of mitochondrial dysfunction during aging requires a thorough evaluation of degradative and nondegradative inter-organelle pathways. Here, we present a geroscience overview on (1) degradative ****pathways, (2) nondegradative processes involving inter-organelle tethering, (3) age-related changes in inter-organelle degradative and nondegradative pathways, and (4) relevance of ****failure to inflammaging and age-related conditions, with a focus on Parkinson's disease as a prototypical geroscience condition.Structural and chemical deterioration and its impact on cell wall mechanics were investigated for visually intact cell walls (VICWs) in waterlogged archaeological wood (WAW). Cell wall mechanical properties were examined by nanoindentation without prior embedding. WAW showed more than 25% decrease of both hardness and elastic modulus. Changes of cell wall composition, cellulose crystallite structure and porosity were investigated by ATR-FTIR imaging, Raman imaging, wet chemistry, 13C-solid state NMR, pyrolysis-GC/MS, wide angle X-ray scattering, and N2 nitrogen adsorption. VICWs in WAW possessed a cleavage of carboxyl in side chains of xylan, a serious loss of polysaccharides, and a partial breakage of β-O-4 interlinks in lignin. This was accompanied by a higher amount of mesopores in cell walls. Even VICWs in WAW were severely deteriorated at the nanoscale with impact on mechanics, which has strong implications for the conservation of archaeological shipwrecks.The application of wastes as a filler/reinforcement phase in polymers is a new strategy to modify the performance properties and reduce the price of biocomposites. The use of these fillers, coming from agricultural waste (cellulose/lignocellulose-based fillers) and waste rubbers, constitutes a method for the management of post-consumer waste. In this paper, highly-filled biocomposites based on natural rubber (NR) and ground tire rubber (GTR)/brewers' spent grain (BSG) hybrid reinforcements, were prepared using two different curing systems (i) sulfur-based and (ii) dicumyl peroxide (DCP). The influence of the amount of fillers (in 100/0, 50/50, and 0/100 ratios in parts per hundred of rubber) and type of curing system on the final properties of biocomposites was evaluated by the oscillating disc rheometer, Fourier-transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy, swelling behavior, tensile testing, and impedance tube measurements. The results show, that the scorch time and the optimum curing time values of sulfur cured biocomposites are affected by the change of the hybrid filler ratio while using the DCP curing system, and the obtained values do not show significant variations. The results conclude that the biocomposites cured with sulfur have better physico-mechanical and acoustic absorption, and that the type of curing system does not influence their thermal stability. The overall analysis indicates that the difference in final properties of highly filled biocomposites cured with two different systems is mainly affected by the (i) cross-linking efficiency, (ii) partial absorption and reactions between fillers and used additives, and (iii) affinity of additives to applied fillers. Poultry diseases pose a large threat to poultry production. https://www.selleckchem.com/products/trastuzumab-emtansine-t-dm1-.html Selection to improve immune traits is a feasible way to prevent and control avian diseases. The objective of this study was to investigate the efficiency of estimation of genetic parameters for antibody response to avian influenza virus (Ab-AIV), antibody response to Newcastle disease virus (Ab-NDV), sheep red blood cell antibody titer (SRBC), the ratio of heterophils to lymphocytes (H/L), immunoglobulin G (IgG), the spleen immune index (SII), thymus immune index (TII), thymus weight at 100 d (TW) and the spleen weight at 100 d (SW) in Beijing oil chickens, by using the best linear unbiased prediction (BLUP) method and genomic best linear unbiased prediction (GBLUP) method. The phenotypic data used in the two methods were the same and were from 519 individuals. With the BLUP model, Ab-AIV, Ab-NDV, SRBC, H/L, IgG, TII, and TW had low heritability ranging from 0.000 to 0.281, whereas SII and SW had high heritability of 0.631 and 0.573. With the GBLUP model, all individuals were genotyped with Illumina 60K SNP chips, and Ab-AIV, Ab-NDV, SRBC, H/L and IgG had low heritability ranging from 0.000 to 0.266, whereas SII, TII, TW and SW had moderate heritability ranging from 0.300 to 0.472. We compared the prediction accuracy obtained from BLUP and GBLUP through 50 time 5-fold cross-validation (CV), and the results indicated that BLUP provided a slightly higher accuracy of prediction than GBLUP in this population.
It is well-known that axon growth can be stimulated by activated glial cells that fulfill a trophic function for regenerating nerves. For this reason, we evaluated the number of Nestin-GFP-positive cells that migrated from the DRG into the Matrigel in our 3D ex vivo explant model. We found that NGF and GDNF, but not BDNF, stimulated the migration of Nestin-GFP cells compared to the control (p less then 0.05). On the basis of the aforementioned finding, we concluded that GDNF had the greatest stimulating potential for axon regeneration, as it stimulated not only the axon outgrowth, but also glial cell migration. Although NGF significantly stimulated glial cell migration, its effect on axon growth was insufficient for axon regeneration.Mitochondrial dysfunction and failing mitochondrial quality control (MQC) are major determinants of aging. Far from being standalone organelles, mitochondria are intricately related with cellular other compartments, including lysosomes. The intimate relationship between mitochondria and lysosomes is reflected by the fact that lysosomal degradation of dysfunctional mitochondria is the final step of mitophagy. Inter-organelle membrane contact sites also allow bidirectional communication between mitochondria and lysosomes as part of nondegradative pathways. This interaction establishes a functional unit that regulates metabolic signaling, mitochondrial dynamics, and, hence, MQC. Contacts of mitochondria with the endoplasmic reticulum (ER) have also been described. ER-mitochondrial interactions are relevant to Ca2+ homeostasis, transfer of phospholipid precursors to mitochondria, and integration of apoptotic signaling. Many proteins involved in mitochondrial contact sites with other organelles also participate to degradative MQC pathways. Hence, a comprehensive assessment of mitochondrial dysfunction during aging requires a thorough evaluation of degradative and nondegradative inter-organelle pathways. Here, we present a geroscience overview on (1) degradative MQC pathways, (2) nondegradative processes involving inter-organelle tethering, (3) age-related changes in inter-organelle degradative and nondegradative pathways, and (4) relevance of MQC failure to inflammaging and age-related conditions, with a focus on Parkinson's disease as a prototypical geroscience condition.Structural and chemical deterioration and its impact on cell wall mechanics were investigated for visually intact cell walls (VICWs) in waterlogged archaeological wood (WAW). Cell wall mechanical properties were examined by nanoindentation without prior embedding. WAW showed more than 25% decrease of both hardness and elastic modulus. Changes of cell wall composition, cellulose crystallite structure and porosity were investigated by ATR-FTIR imaging, Raman imaging, wet chemistry, 13C-solid state NMR, pyrolysis-GC/MS, wide angle X-ray scattering, and N2 nitrogen adsorption. VICWs in WAW possessed a cleavage of carboxyl in side chains of xylan, a serious loss of polysaccharides, and a partial breakage of β-O-4 interlinks in lignin. This was accompanied by a higher amount of mesopores in cell walls. Even VICWs in WAW were severely deteriorated at the nanoscale with impact on mechanics, which has strong implications for the conservation of archaeological shipwrecks.The application of wastes as a filler/reinforcement phase in polymers is a new strategy to modify the performance properties and reduce the price of biocomposites. The use of these fillers, coming from agricultural waste (cellulose/lignocellulose-based fillers) and waste rubbers, constitutes a method for the management of post-consumer waste. In this paper, highly-filled biocomposites based on natural rubber (NR) and ground tire rubber (GTR)/brewers' spent grain (BSG) hybrid reinforcements, were prepared using two different curing systems (i) sulfur-based and (ii) dicumyl peroxide (DCP). The influence of the amount of fillers (in 100/0, 50/50, and 0/100 ratios in parts per hundred of rubber) and type of curing system on the final properties of biocomposites was evaluated by the oscillating disc rheometer, Fourier-transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy, swelling behavior, tensile testing, and impedance tube measurements. The results show, that the scorch time and the optimum curing time values of sulfur cured biocomposites are affected by the change of the hybrid filler ratio while using the DCP curing system, and the obtained values do not show significant variations. The results conclude that the biocomposites cured with sulfur have better physico-mechanical and acoustic absorption, and that the type of curing system does not influence their thermal stability. The overall analysis indicates that the difference in final properties of highly filled biocomposites cured with two different systems is mainly affected by the (i) cross-linking efficiency, (ii) partial absorption and reactions between fillers and used additives, and (iii) affinity of additives to applied fillers. Poultry diseases pose a large threat to poultry production. https://www.selleckchem.com/products/trastuzumab-emtansine-t-dm1-.html Selection to improve immune traits is a feasible way to prevent and control avian diseases. The objective of this study was to investigate the efficiency of estimation of genetic parameters for antibody response to avian influenza virus (Ab-AIV), antibody response to Newcastle disease virus (Ab-NDV), sheep red blood cell antibody titer (SRBC), the ratio of heterophils to lymphocytes (H/L), immunoglobulin G (IgG), the spleen immune index (SII), thymus immune index (TII), thymus weight at 100 d (TW) and the spleen weight at 100 d (SW) in Beijing oil chickens, by using the best linear unbiased prediction (BLUP) method and genomic best linear unbiased prediction (GBLUP) method. The phenotypic data used in the two methods were the same and were from 519 individuals. With the BLUP model, Ab-AIV, Ab-NDV, SRBC, H/L, IgG, TII, and TW had low heritability ranging from 0.000 to 0.281, whereas SII and SW had high heritability of 0.631 and 0.573. With the GBLUP model, all individuals were genotyped with Illumina 60K SNP chips, and Ab-AIV, Ab-NDV, SRBC, H/L and IgG had low heritability ranging from 0.000 to 0.266, whereas SII, TII, TW and SW had moderate heritability ranging from 0.300 to 0.472. We compared the prediction accuracy obtained from BLUP and GBLUP through 50 time 5-fold cross-validation (CV), and the results indicated that BLUP provided a slightly higher accuracy of prediction than GBLUP in this population.0 Commenti 0 condivisioni 23 Views 0 Anteprima -
Developing cost-effective and efficient oxygen evolution reaction (OER) electrocatalyst is highly essential for energy-conversion technologies. A self-assembled NiFe-layered double hydroxide (LDH)@MnCO3 heterostructure prepared on Ni foam using a successive hydrothermal strategy shows notable catalytic activity toward the OER with a small overpotential of 275 mV to drive a geometrical current density of 10 mA cm-2 under alkaline conditions with remarkable stability for 15 h, outperforming IrO2/C electrocatalyst (350 mV@10 mA cm-2). The hierarchical NiFe-LDH@MnCO3 heterostructure possess more exposed active sites, enhanced conductivity and superior interfacial coupling effect makes them an ideal candidate for OER electrocatalyst. Antibiotic contaminants have received **** attention due to the increasing serious environmental concerns. In this work, for the first time, we have fabricated a series of significant type-II p-n heterostructure with Z-scheme charge transfer between p-type B-doped g-C3N4 with different proportion of n-type BN through a simple in-situ growth process. PXRD, FTIR, UV-Vis, FESEM, HRTEM and EIS analysis were applied for the detailed characterization of the as-prepared composites to study the crystal phase, structural features, optical and electrical properties. The photocatalytic behaviour of BN/BCN photocatalyst was investigated by the degradation of tetracycline hydrochloride under solar light illumination. Experimental results revealed that about 88.1% of TCH was degraded by the BN/BCN composite containing 4 wt% BN in the BN/BCN matrix, in 60 min of solar light irradiation. Reduction in recombination rate of photo generated electron-hole pair's and enhanced visible light absorption ability is credited to the enhanced photocatalytic performance of BN/BCN composite. Trapping experiment for the scavenging agents has confirmed that superoxide (O2&****;) and hydroxyl (OH) radicals are the main reactive species during the TCH degradation process. The high stability shown by the BN/BCN composite opens a new path for designing of significant BN based Z-scheme photocatalyst for prevention of environmental issues. Assembly of plasmonic nanoparticle clusters having hotspots in a specific space is an effective way to efficiently utilize their plasmonic properties. In the assembly, however, bulk-like aggregates of the nanoparticles are readily formed by strong van der Waals forces, inducing a decrease of the properties. The present work proposes an advanced method to avoid aggregation of the clusters by encapsulating into a confined space of hollow silica interior. Hollow spheres incorporating gold nanoparticle clusters were synthesized by a surface-protected etching process. The observation of inner nanoparticles with liquid cell transmission electron microscopy experimentally proved that the nanoparticles moved as a cluster instead of as dispersed nanoparticles within the water-filled hollow compartment. The hollow spheres incorporating the nanoparticle clusters were assembled in the vicinity of electrodes by application of an external AC electric field, resulting in the enhancement of Raman intensities of probe molecules. The nanoparticle-cluster-containing hollow spheres were redispersed when the electric field was turned off, showing that the hollow silica spheres can act as a physical barrier to avoid the cluster aggregation. The Raman intensities were reversibly changed by switching the electric field on and off to control the assembled or dispersed states of the hollow spheres. Core-shell Fe3C@NC nanostructures constructed by Fe3C core encapsulated in N-doped carbon nanotubes (FFCN-MP4000) is designed and readily prepared via a facile and economical solid-state chemical route. By controlling the proportion of C and N in the starting materials, the composition of FeNC core-shell nanotubes was optimized, then provided more possible active sites as electrocatalysts, exhibited superior oxygen reduction performance. https://www.selleckchem.com/products/AZD5438.html Onset potential (Eonset) of 0.96 V versus reversible hydrogen electrode (RHE) and half-wave potential (E1/2) of 0.83 V vs RHE was obtained in 0.1 M KOH, which are comparable to those of the commercial Pt/C catalyst (Eonset = 0.98 V, E1/2 = 0.84 V vs RHE). Notably, the limited current density for FFCN-MP4000 can reach to 6.6 mA cm-2, and it efficiently catalyzes 4-electron reduction of oxygen (n = 3.98) with a hydrogen peroxide yield of below 2.2%. In addition, the methanol tolerance and durability are even superior to commercial Pt/C catalyst. This work provides a facile and economical strategy for the feasible design of oxygen reduction reaction (ORR) electrocatalyst with high activity and low cost in alternative commercial Pt/C electrocatalyst. Debate about the cross-cultural relevance of depression has been central to cross-cultural psychiatry and global mental health. Although there is now a wealth of evidence pertaining to symptoms across different cultural settings, the role of the health system in addressing these problems remains contentious. Depression is undetected among people attending health facilities. We carried out a thematic synthesis of qualitative evidence published in the scientific literature from sub-Saharan Africa to understand how depression is debated, deployed and described. No date limits were set for inclusion of articles. Our results included 23 studies carried out in communities, among people living with HIV, attendees of primary healthcare and with healthcare workers and traditional healers. Included studies were carried out between 1995 and 2018. In most cases, depression was differentiated from 'madness' and seen to have its roots in social adversity, predominantly economic and relationship problems, sometimes entangleg other resources available to people living with depression. Advances in molecular dynamics simulations have led to large increases across spatial and complexity scales, providing valuable molecular level insight into processes occurring on the subcellular level. An increasing repertoire of methods to assemble and analyse complex membrane simulations, alongside advances in structural biology methods for membrane proteins, have contributed to our increased understanding of the roles of specific lipid interactions for multiple membrane protein systems. Large scale simulations of crowded protein solutions have provided a model describing the biophysical basis for experimentally observed diffusion properties. In this review we discuss recent approaches that pave the way towards linking molecular level detail to the cellular level.
Developing cost-effective and efficient oxygen evolution reaction (OER) electrocatalyst is highly essential for energy-conversion technologies. A self-assembled NiFe-layered double hydroxide (LDH)@MnCO3 heterostructure prepared on Ni foam using a successive hydrothermal strategy shows notable catalytic activity toward the OER with a small overpotential of 275 mV to drive a geometrical current density of 10 mA cm-2 under alkaline conditions with remarkable stability for 15 h, outperforming IrO2/C electrocatalyst (350 mV@10 mA cm-2). The hierarchical NiFe-LDH@MnCO3 heterostructure possess more exposed active sites, enhanced conductivity and superior interfacial coupling effect makes them an ideal candidate for OER electrocatalyst. Antibiotic contaminants have received much attention due to the increasing serious environmental concerns. In this work, for the first time, we have fabricated a series of significant type-II p-n heterostructure with Z-scheme charge transfer between p-type B-doped g-C3N4 with different proportion of n-type BN through a simple in-situ growth process. PXRD, FTIR, UV-Vis, FESEM, HRTEM and EIS analysis were applied for the detailed characterization of the as-prepared composites to study the crystal phase, structural features, optical and electrical properties. The photocatalytic behaviour of BN/BCN photocatalyst was investigated by the degradation of tetracycline hydrochloride under solar light illumination. Experimental results revealed that about 88.1% of TCH was degraded by the BN/BCN composite containing 4 wt% BN in the BN/BCN matrix, in 60 min of solar light irradiation. Reduction in recombination rate of photo generated electron-hole pair's and enhanced visible light absorption ability is credited to the enhanced photocatalytic performance of BN/BCN composite. Trapping experiment for the scavenging agents has confirmed that superoxide (O2¯) and hydroxyl (OH) radicals are the main reactive species during the TCH degradation process. The high stability shown by the BN/BCN composite opens a new path for designing of significant BN based Z-scheme photocatalyst for prevention of environmental issues. Assembly of plasmonic nanoparticle clusters having hotspots in a specific space is an effective way to efficiently utilize their plasmonic properties. In the assembly, however, bulk-like aggregates of the nanoparticles are readily formed by strong van der Waals forces, inducing a decrease of the properties. The present work proposes an advanced method to avoid aggregation of the clusters by encapsulating into a confined space of hollow silica interior. Hollow spheres incorporating gold nanoparticle clusters were synthesized by a surface-protected etching process. The observation of inner nanoparticles with liquid cell transmission electron microscopy experimentally proved that the nanoparticles moved as a cluster instead of as dispersed nanoparticles within the water-filled hollow compartment. The hollow spheres incorporating the nanoparticle clusters were assembled in the vicinity of electrodes by application of an external AC electric field, resulting in the enhancement of Raman intensities of probe molecules. The nanoparticle-cluster-containing hollow spheres were redispersed when the electric field was turned off, showing that the hollow silica spheres can act as a physical barrier to avoid the cluster aggregation. The Raman intensities were reversibly changed by switching the electric field on and off to control the assembled or dispersed states of the hollow spheres. Core-shell Fe3C@NC nanostructures constructed by Fe3C core encapsulated in N-doped carbon nanotubes (FFCN-MP4000) is designed and readily prepared via a facile and economical solid-state chemical route. By controlling the proportion of C and N in the starting materials, the composition of FeNC core-shell nanotubes was optimized, then provided more possible active sites as electrocatalysts, exhibited superior oxygen reduction performance. https://www.selleckchem.com/products/AZD5438.html Onset potential (Eonset) of 0.96 V versus reversible hydrogen electrode (RHE) and half-wave potential (E1/2) of 0.83 V vs RHE was obtained in 0.1 M KOH, which are comparable to those of the commercial Pt/C catalyst (Eonset = 0.98 V, E1/2 = 0.84 V vs RHE). Notably, the limited current density for FFCN-MP4000 can reach to 6.6 mA cm-2, and it efficiently catalyzes 4-electron reduction of oxygen (n = 3.98) with a hydrogen peroxide yield of below 2.2%. In addition, the methanol tolerance and durability are even superior to commercial Pt/C catalyst. This work provides a facile and economical strategy for the feasible design of oxygen reduction reaction (ORR) electrocatalyst with high activity and low cost in alternative commercial Pt/C electrocatalyst. Debate about the cross-cultural relevance of depression has been central to cross-cultural psychiatry and global mental health. Although there is now a wealth of evidence pertaining to symptoms across different cultural settings, the role of the health system in addressing these problems remains contentious. Depression is undetected among people attending health facilities. We carried out a thematic synthesis of qualitative evidence published in the scientific literature from sub-Saharan Africa to understand how depression is debated, deployed and described. No date limits were set for inclusion of articles. Our results included 23 studies carried out in communities, among people living with HIV, attendees of primary healthcare and with healthcare workers and traditional healers. Included studies were carried out between 1995 and 2018. In most cases, depression was differentiated from 'madness' and seen to have its roots in social adversity, predominantly economic and relationship problems, sometimes entangleg other resources available to people living with depression. Advances in molecular dynamics simulations have led to large increases across spatial and complexity scales, providing valuable molecular level insight into processes occurring on the subcellular level. An increasing repertoire of methods to assemble and analyse complex membrane simulations, alongside advances in structural biology methods for membrane proteins, have contributed to our increased understanding of the roles of specific lipid interactions for multiple membrane protein systems. Large scale simulations of crowded protein solutions have provided a model describing the biophysical basis for experimentally observed diffusion properties. In this review we discuss recent approaches that pave the way towards linking molecular level detail to the cellular level.0 Commenti 0 condivisioni 15 Views 0 Anteprima
Altre storie