in absence of light, the reaction kinetics of Mn(II) and Fe(III)-atalyzed oxidation ofS(IV) in unbuffered and buffered solutions were studied. An activation energy of 77.4kJ . mol￣(-1) forthe Mn(II)catalyzed oxidatio...in absence of light, the reaction kinetics of Mn(II) and Fe(III)-atalyzed oxidation ofS(IV) in unbuffered and buffered solutions were studied. An activation energy of 77.4kJ . mol￣(-1) forthe Mn(II)catalyzed oxidation of S(IV) is obtained. On the basis of the investigation of thecatalytic effects of Mn(II) and Fe(III) on the oxidation of S(IV), it has been elucidated that thecatalytic activity of Mn(II) is greater than that of Fet(III), and that Mn(II) and Fe(III) do not havea significant synergic effect on the catalytic oxidation of S (IV). The catalytic oxidation andautooxidation of S(IV) in unbuffered solution was also explored in the presence of light. The resultsshow that the reaction is first order with respect to S(IV) concentrations, the reaction rate increaseswith increasing light intensity and the concentrations of Fe(III) and Mn(II), and that the photoas-sisted catalytic activity of Fe(III) is greater than that of Mn(II).展开更多
Honour, one of the eternal themes in Shakespeare, is again in the spotlightin Henry IV Part I. In this play, the rivalry between Prince Hal and Hotspuremerges actually out of their cravings for the title of royal hono...Honour, one of the eternal themes in Shakespeare, is again in the spotlightin Henry IV Part I. In this play, the rivalry between Prince Hal and Hotspuremerges actually out of their cravings for the title of royal honour and valour.Hotspur appears to be formidable, courageous and energetic. He is exactly展开更多
Zeolites NaY and Ce（IV）Y were employed as adsorbents to remove organic sulfur compounds from model gasoline （MG） solutions with and without toluene in static adsorption experiments at room temperature （RT） and a...Zeolites NaY and Ce（IV）Y were employed as adsorbents to remove organic sulfur compounds from model gasoline （MG） solutions with and without toluene in static adsorption experiments at room temperature （RT） and atmospheric pressure. The adsorbents were characterized by XRD, XRF and pyridine infrared spectrum （IR）. The adsorption experiments show that the desulfurization performance of Ce（IV）Y is much better than that of NaY. The sulfur removal over both NaY and Ce（IV）Y decreases with the increase of toluene concentration in MG, however, the decline tendency on Ce（IV）Y is smooth, and it is steep on NaY. FT-IR spectra of thiophene adsorption indicate that thiophene molecules are mainly adsorbed on NaY via π electron interaction, but on Ce（IV）Y, in addition to the π electron interaction, both Ce^4＋-S direct interaction and protonation of thiophene also play important roles. Toluene molecules are adsorbed on NaY also via π electron interaction. Although the amount of Bronsted acid sites is increased due to the introduction of Ce^4＋ ions into NaY zeolite, it is not found to influence the adsorption mode of toluene over Ce（IV）Y. Compared with NaY zeolite, the improved desulfurization performance over Ce（IV）Y for removing organic sulfur compounds from MG solution, especially those containing large amount of aromatics, may be ascribed to the direct Ce（IV）-S interaction, which is much resistant to the influence resulted from toluene adsorption.展开更多
BACKGROUND Non-alcoholic fatty liver disease(NAFLD)is the most common cause of chronic liver disease and affects approximately 25%of the general global adult population.The prognosis of NAFLD patients with advanced li...BACKGROUND Non-alcoholic fatty liver disease(NAFLD)is the most common cause of chronic liver disease and affects approximately 25%of the general global adult population.The prognosis of NAFLD patients with advanced liver fibrosis is known to be poor.It is difficult to assess disease progression in all patients with NAFLD;thus,it is necessary to identify patients who will show poor prognosis.AIM To investigate the efficacy of non-invasive biomarkers for predicting disease progression in patients with NAFLD.METHODS We investigated biomarkers associated with mortality in patients with NAFLD who visited the Kawasaki Medical School General Medical Center from 1996 to 2018 and underwent liver biopsy and had been followed-up for>1 year.Cumulative overall mortality and liver-related events during follow-up were calculated using the Kaplan-Meier analysis and compared using log-rank testing.We calculated the odds ratio and performed receiver operating characteristic curve analysis with logistic regression analysis to determine the optimal cut-off value with the highest prognostic ability.RESULTS We enrolled 489 patients who were followed-up for a period of 1-22.2 years.In total,13 patients died(2.7%of total patients enrolled);7 patients died due to liverrelated causes.Poor prognosis was associated with liver fibrosis on histological examination but not with inflammation or steatosis.Blood biomarkers associated with mortality were platelet counts,albumin levels,and type IV collagen 7S levels.The optimal cutoff index for predicting total mortality was a platelet count of 15×10^(4)/μL,albumin level of 3.5 g/dL,and type IV collagen 7S level of 5 mg/dL.In particular,only one-factor patients with NAFLD presenting with platelet counts≤15×10^(4)/μL,albumin levels≤3.5 g/dL,or type IV collagen 7S≥5 mg/dL showed 5-year,10-year,and 15-year survival rates of 99.7%,98.3%,and 94%,respectively.However,patients with two factors had lower 5-year and 10-year survival rates of 98%and 43%,respectively.Similarly,patients with all three factors showed the lowest 5-year and 10-year survival rates of 53%and 26%,respectively.CONCLUSION A combination of the three non-invasive biomarkers is a useful predictor of NAFLD prognosis and can help identify patients with NAFLD who are at a high risk of all-cause mortality.展开更多
目的观察淫黄葛合剂对APP_(swe)/PS1_(dE9)小鼠行为及海马胱氨酸/谷氨酸反向转运体的表达影响。方法6只8月龄雄性C57BL/6J小鼠为正常组,18只8月龄雄性APP_(swe)/PS1_(dE9)小鼠随机分为模型组、合剂组、地拉罗司(deferasirox,DFX)组,每组...目的观察淫黄葛合剂对APP_(swe)/PS1_(dE9)小鼠行为及海马胱氨酸/谷氨酸反向转运体的表达影响。方法6只8月龄雄性C57BL/6J小鼠为正常组,18只8月龄雄性APP_(swe)/PS1_(dE9)小鼠随机分为模型组、合剂组、地拉罗司(deferasirox,DFX)组,每组6只。正常组、模型组给予蒸馏水灌胃,合剂组灌胃淫黄葛合剂(淫羊藿苷120 mg·kg^(-1)、黄芪甲苷80 mg·kg^(-1)、葛根素80 mg·kg^(-1)),DFX组灌胃DFX(100 mg·kg^(-1)),每日1次,干预2个月。利用八臂迷宫实验检测各组小鼠空间、学习记忆能力;免疫荧光观察正常组、模型组小鼠海马CA3区溶质载体家族7成员11(solute carrier family 7 member 11,SLC7A11)与溶质载体家族3成员2(solute carrier family 3 member 2,SLC3A2)的表达水平;Western blot和real time q-PCR检测各组小鼠海马SLC7A11、SLC3A2蛋白及mRNA表达水平。结果与正常组相比,模型组小鼠空间学习记忆能力下降,海马CA3区SLC7A11、SLC3A2表达下降(P<0.05),海马SLC7A11、SLC3A2蛋白及mRNA表达下降(P<0.05);与模型组相比,合剂组、DFX组空间学习记忆能力提升,海马SLC7A11、SLC3A2蛋白及mRNA表达上升(P<0.05);合剂组与DFX组各项指标差异无统计学意义(P>0.05)。结论淫黄葛合剂可以改善APP_(swe)/PS1_(dE9)小鼠的行为障碍,其机制与促进海马SLC7A11、SLC3A2的表达有关。展开更多
文摘in absence of light, the reaction kinetics of Mn(II) and Fe(III)-atalyzed oxidation ofS(IV) in unbuffered and buffered solutions were studied. An activation energy of 77.4kJ . mol￣(-1) forthe Mn(II)catalyzed oxidation of S(IV) is obtained. On the basis of the investigation of thecatalytic effects of Mn(II) and Fe(III) on the oxidation of S(IV), it has been elucidated that thecatalytic activity of Mn(II) is greater than that of Fet(III), and that Mn(II) and Fe(III) do not havea significant synergic effect on the catalytic oxidation of S (IV). The catalytic oxidation andautooxidation of S(IV) in unbuffered solution was also explored in the presence of light. The resultsshow that the reaction is first order with respect to S(IV) concentrations, the reaction rate increaseswith increasing light intensity and the concentrations of Fe(III) and Mn(II), and that the photoas-sisted catalytic activity of Fe(III) is greater than that of Mn(II).
文摘Honour, one of the eternal themes in Shakespeare, is again in the spotlightin Henry IV Part I. In this play, the rivalry between Prince Hal and Hotspuremerges actually out of their cravings for the title of royal honour and valour.Hotspur appears to be formidable, courageous and energetic. He is exactly
基金supported by the Fundamental Research Funds for the Key Universities (Grant No. DUT10LK25)the National Natural Science Foundation of China (Grant No. 21106014)
文摘Zeolites NaY and Ce（IV）Y were employed as adsorbents to remove organic sulfur compounds from model gasoline （MG） solutions with and without toluene in static adsorption experiments at room temperature （RT） and atmospheric pressure. The adsorbents were characterized by XRD, XRF and pyridine infrared spectrum （IR）. The adsorption experiments show that the desulfurization performance of Ce（IV）Y is much better than that of NaY. The sulfur removal over both NaY and Ce（IV）Y decreases with the increase of toluene concentration in MG, however, the decline tendency on Ce（IV）Y is smooth, and it is steep on NaY. FT-IR spectra of thiophene adsorption indicate that thiophene molecules are mainly adsorbed on NaY via π electron interaction, but on Ce（IV）Y, in addition to the π electron interaction, both Ce^4＋-S direct interaction and protonation of thiophene also play important roles. Toluene molecules are adsorbed on NaY also via π electron interaction. Although the amount of Bronsted acid sites is increased due to the introduction of Ce^4＋ ions into NaY zeolite, it is not found to influence the adsorption mode of toluene over Ce（IV）Y. Compared with NaY zeolite, the improved desulfurization performance over Ce（IV）Y for removing organic sulfur compounds from MG solution, especially those containing large amount of aromatics, may be ascribed to the direct Ce（IV）-S interaction, which is much resistant to the influence resulted from toluene adsorption.
文摘BACKGROUND Non-alcoholic fatty liver disease(NAFLD)is the most common cause of chronic liver disease and affects approximately 25%of the general global adult population.The prognosis of NAFLD patients with advanced liver fibrosis is known to be poor.It is difficult to assess disease progression in all patients with NAFLD;thus,it is necessary to identify patients who will show poor prognosis.AIM To investigate the efficacy of non-invasive biomarkers for predicting disease progression in patients with NAFLD.METHODS We investigated biomarkers associated with mortality in patients with NAFLD who visited the Kawasaki Medical School General Medical Center from 1996 to 2018 and underwent liver biopsy and had been followed-up for>1 year.Cumulative overall mortality and liver-related events during follow-up were calculated using the Kaplan-Meier analysis and compared using log-rank testing.We calculated the odds ratio and performed receiver operating characteristic curve analysis with logistic regression analysis to determine the optimal cut-off value with the highest prognostic ability.RESULTS We enrolled 489 patients who were followed-up for a period of 1-22.2 years.In total,13 patients died(2.7%of total patients enrolled);7 patients died due to liverrelated causes.Poor prognosis was associated with liver fibrosis on histological examination but not with inflammation or steatosis.Blood biomarkers associated with mortality were platelet counts,albumin levels,and type IV collagen 7S levels.The optimal cutoff index for predicting total mortality was a platelet count of 15×10^(4)/μL,albumin level of 3.5 g/dL,and type IV collagen 7S level of 5 mg/dL.In particular,only one-factor patients with NAFLD presenting with platelet counts≤15×10^(4)/μL,albumin levels≤3.5 g/dL,or type IV collagen 7S≥5 mg/dL showed 5-year,10-year,and 15-year survival rates of 99.7%,98.3%,and 94%,respectively.However,patients with two factors had lower 5-year and 10-year survival rates of 98%and 43%,respectively.Similarly,patients with all three factors showed the lowest 5-year and 10-year survival rates of 53%and 26%,respectively.CONCLUSION A combination of the three non-invasive biomarkers is a useful predictor of NAFLD prognosis and can help identify patients with NAFLD who are at a high risk of all-cause mortality.
文摘目的观察淫黄葛合剂对APP_(swe)/PS1_(dE9)小鼠行为及海马胱氨酸/谷氨酸反向转运体的表达影响。方法6只8月龄雄性C57BL/6J小鼠为正常组,18只8月龄雄性APP_(swe)/PS1_(dE9)小鼠随机分为模型组、合剂组、地拉罗司(deferasirox,DFX)组,每组6只。正常组、模型组给予蒸馏水灌胃,合剂组灌胃淫黄葛合剂(淫羊藿苷120 mg·kg^(-1)、黄芪甲苷80 mg·kg^(-1)、葛根素80 mg·kg^(-1)),DFX组灌胃DFX(100 mg·kg^(-1)),每日1次,干预2个月。利用八臂迷宫实验检测各组小鼠空间、学习记忆能力;免疫荧光观察正常组、模型组小鼠海马CA3区溶质载体家族7成员11(solute carrier family 7 member 11,SLC7A11)与溶质载体家族3成员2(solute carrier family 3 member 2,SLC3A2)的表达水平;Western blot和real time q-PCR检测各组小鼠海马SLC7A11、SLC3A2蛋白及mRNA表达水平。结果与正常组相比,模型组小鼠空间学习记忆能力下降,海马CA3区SLC7A11、SLC3A2表达下降(P<0.05),海马SLC7A11、SLC3A2蛋白及mRNA表达下降(P<0.05);与模型组相比,合剂组、DFX组空间学习记忆能力提升,海马SLC7A11、SLC3A2蛋白及mRNA表达上升(P<0.05);合剂组与DFX组各项指标差异无统计学意义(P>0.05)。结论淫黄葛合剂可以改善APP_(swe)/PS1_(dE9)小鼠的行为障碍,其机制与促进海马SLC7A11、SLC3A2的表达有关。
