C.I. Acid Red 73(AR73)wastewater was treated by cross-flow nanofiltration coupling electro-catalytic oxidation using an NF90 membrane and a Ti/SnO_2–Sb anode prepared via electrodeposition.Experiments conducted for s...C.I. Acid Red 73(AR73)wastewater was treated by cross-flow nanofiltration coupling electro-catalytic oxidation using an NF90 membrane and a Ti/SnO_2–Sb anode prepared via electrodeposition.Experiments conducted for standard electrochemical degradation of AR73 studied the reaction rate ofremoving AR73 using the Ti/SnO _2–Sb anode.A computational fluid dynamics(CFD)model was developed to predict the permeate flux under a laminar flow regime,including the effects ofoperating pressure,applied potential,initial concentration,and cross-flow velocity on this coupling process.The variations of the membrane surface concentration and permeate flux along the length of the channel were quantified.The experimental results were compared with those predicted by the model,and they agreed well.展开更多
Background:Acute decompensated heart failure(ADHF)is a life-threatening and costly disease.Controversy re-mains regarding the effi cacy and renal tolerability of ultrafi ltration for treating ADHF.We therefore perform...Background:Acute decompensated heart failure(ADHF)is a life-threatening and costly disease.Controversy re-mains regarding the effi cacy and renal tolerability of ultrafi ltration for treating ADHF.We therefore performed this meta-analysis to evaluate this clinical issue.Methods:A search of PubMed,EMBASE,and the Cochrane database of controlled trials was performed from in-ception to March 2021 for relevant randomized controlled trials.The quality of the included trials and outcomes was evaluated with the use of the risk of bias assessment tool and the Grading of Recommendations,Assessment,Develop-ment and Evaluation(GRADE)approach,respectively.The risk ratio and the standardized mean difference(SMD)or weighted mean difference(WMD)were computed and pooled with fi xed-effects or random-effects models.Results:This meta-analysis included 19 studies involving 1281 patients.Ultrafi ltration was superior to the control treatments for weight loss(WMD 1.24 kg,95%confi dence interval[CI]0.38-2.09 kg,P=0.004)and fl uid removal(WMD 1.55 L,95%CI 0.51-2.59 l,P=0.003)and was associated with a signifi cant increase in serum creatinine level compared with the control treatments(SMD 0.15 mg/dL,95%CI 0.00-0.30 mg/dL,P=0.04).However,no signifi cant effects were found for serum N-terminal prohormone of brain natriuretic peptide level,length of hospital stay,all-cause mortality,or all-cause rehospitalization in the ultrafi ltration group.Conclusions:The use of ultrafi ltration in patients with ADHF is superior to the use of the control treatments for weight loss and fl uid removal,but has adverse renal effects and lacks signifi cant effects on long-term prognosis,in-dicating that this approach to decongestion in ADHF patients is effi cient for fl uid management but less safe renally.展开更多
The effects of the operating pressure,crossflow velocity,feed concentration,and temperature on the streaming and Zeta potential of the membranes were studied.The permeateflux and the retention rate under different nanofi...The effects of the operating pressure,crossflow velocity,feed concentration,and temperature on the streaming and Zeta potential of the membranes were studied.The permeateflux and the retention rate under different nanofiltration operating conditions were also investigated.The results show that the higher pressure,feed concentration,temperature,and lower crossflow velocity lead to the higher absolute value of streaming and Zeta potential.The permeateflux of the nanofiltration decreases with the feed concentration and increases with not only the pressure but also the crossflow velocity and temperature.The higher the pressure and the crossflow velocity,the higher the retention rate.The lower feed concentration and higher temperature leads to lower retention rate.The effects of the operating conditions on the permeateflux and the retention rate were explained by the variation of the membrane charge property.展开更多
We prove that the invariant locus of the involution associated with a general double EisenbudPopescu-Walter(EPW)sextic is a constant cycle surface and introduce a filtration on CH1of a Gushel-Mukai fourfold.We verify ...We prove that the invariant locus of the involution associated with a general double EisenbudPopescu-Walter(EPW)sextic is a constant cycle surface and introduce a filtration on CH1of a Gushel-Mukai fourfold.We verify the sheaf/cycle correspondence for sheaves supported on low-degree rational curves,parallel to the case of cubic fourfolds of Shen-Yin’s work.展开更多
BACKGROUND:Acute liver failure(ALF) caused by viral and non-viral hepatitis is often accompanied with severe metabolic disorders,the accumulation of toxic substances and continuous release and accumulation of a large ...BACKGROUND:Acute liver failure(ALF) caused by viral and non-viral hepatitis is often accompanied with severe metabolic disorders,the accumulation of toxic substances and continuous release and accumulation of a large number of endogenous toxins and inflammatory mediators. The present study aimed to investigate the effects of various combined non-biological artif icial liver treatments for patients with acute liver failure(ALF) complicated by multiple organ dysfunction syndrome(MODS).METHODS:Thirty-one patients with mid- or late-stage liver failure complicated by MODS(score 4) were randomly divided into three treatment groups:plasmapheresis(PE) combined with hemoperfusion(HP) and continuous venovenous hemodiafiltration(CVVHDF),PE+CVVHDF,and HP+CVVHDF,respectively. Heart rate(HR) before and after treatment,mean arterial pressure(MAP),respiratory index(PaO2/FiO2),hepatic function,platelet count,and blood coagulation were determined.RESULTS:Signifi cant improvement was observed in HR,MAP,PaO2/FiO2,total bilirubin(TBIL) and alanine aminotransferase(ALT) levels after treatment(P<0.05). TBIL and ALT decreased more signifi cantly after treatment in the PE+CVVHDF and PE+HP+CVVHDF groups(P<0.01). Prothrombin time(PT) and albumin were signifi cantly improved only in the PE+CVVHDF and PE+HP+CVVHDF groups(P<0.05). TBIL decreased more significantly in the PE+HP+CVVHDF group than in the HP+CVVHDF and PE+CVVHDF groups(P<0.05). The survival rate of the patients was 58.1%(18/31),viral survival rate 36.4%(4/11),and non-viral survival rate 70%(14/20).CONCLUSION:Liver function was relatively improved after treatment,but PE+HP+CVVHDF was more efficient for the removal of toxic metabolites,especially bilirubin. The survival rate was signifi cantly higher in the patients with non-viral liver failure than in those with viral liver failure.展开更多
BACKGROUND： The study aimed to investigate the clinical characteristics of acute renal failure（ARF） caused by oral acyclovir.METHODS： A 45-year-old Chinese male patient with acyclovir-induced ARF suffered fromabdo...BACKGROUND： The study aimed to investigate the clinical characteristics of acute renal failure（ARF） caused by oral acyclovir.METHODS： A 45-year-old Chinese male patient with acyclovir-induced ARF suffered fromabdominal pain for one day. The pain was extended to the epigastric area from the right lowerquadrant. Transient oliguria was seen in addition to microscopic hematuria and proteinuria. Theserum creatinine concentration was 304 !mol/L. Eight days before the occurrence of ARF, the patienttook oral acyclovir for facial neuritis.RESULTS： His renal function was restored completely following the discontinuation of acyclovir,with continuous renal replacement therapy for 54 hours and some symptomatic treatment.CONCLUSION： The presentation of acute renal failure caused by acyclovir can be diverse, butthe prognosis is good after active treatment.展开更多
基金supported by the National Natural Science Foundation of China (No.21276177)Science and Technology Program of Tianjin as “Innovation Fund for Small and MediumSized Technology-Based Firms” (No.14ZXCXGX00335)
文摘C.I. Acid Red 73(AR73)wastewater was treated by cross-flow nanofiltration coupling electro-catalytic oxidation using an NF90 membrane and a Ti/SnO_2–Sb anode prepared via electrodeposition.Experiments conducted for standard electrochemical degradation of AR73 studied the reaction rate ofremoving AR73 using the Ti/SnO _2–Sb anode.A computational fluid dynamics(CFD)model was developed to predict the permeate flux under a laminar flow regime,including the effects ofoperating pressure,applied potential,initial concentration,and cross-flow velocity on this coupling process.The variations of the membrane surface concentration and permeate flux along the length of the channel were quantified.The experimental results were compared with those predicted by the model,and they agreed well.
基金funded by grants from the National Natural Science Foundation of China(no 81900631)the China Postdoctoral Science Foundation(2019M653354)+1 种基金the Natural Science Foundation Postdoctoral Program of Chongqing Science and Technology Bureau(cstc2019jcyj-bsh0012)the Kuanren Talents Program of the Second Affi liated Hospital of Chongqing Medical University.
文摘Background:Acute decompensated heart failure(ADHF)is a life-threatening and costly disease.Controversy re-mains regarding the effi cacy and renal tolerability of ultrafi ltration for treating ADHF.We therefore performed this meta-analysis to evaluate this clinical issue.Methods:A search of PubMed,EMBASE,and the Cochrane database of controlled trials was performed from in-ception to March 2021 for relevant randomized controlled trials.The quality of the included trials and outcomes was evaluated with the use of the risk of bias assessment tool and the Grading of Recommendations,Assessment,Develop-ment and Evaluation(GRADE)approach,respectively.The risk ratio and the standardized mean difference(SMD)or weighted mean difference(WMD)were computed and pooled with fi xed-effects or random-effects models.Results:This meta-analysis included 19 studies involving 1281 patients.Ultrafi ltration was superior to the control treatments for weight loss(WMD 1.24 kg,95%confi dence interval[CI]0.38-2.09 kg,P=0.004)and fl uid removal(WMD 1.55 L,95%CI 0.51-2.59 l,P=0.003)and was associated with a signifi cant increase in serum creatinine level compared with the control treatments(SMD 0.15 mg/dL,95%CI 0.00-0.30 mg/dL,P=0.04).However,no signifi cant effects were found for serum N-terminal prohormone of brain natriuretic peptide level,length of hospital stay,all-cause mortality,or all-cause rehospitalization in the ultrafi ltration group.Conclusions:The use of ultrafi ltration in patients with ADHF is superior to the use of the control treatments for weight loss and fl uid removal,but has adverse renal effects and lacks signifi cant effects on long-term prognosis,in-dicating that this approach to decongestion in ADHF patients is effi cient for fl uid management but less safe renally.
基金the Natural Science Foundation of Tianjin(10JCYBJC04900)for financial assistance.
文摘The effects of the operating pressure,crossflow velocity,feed concentration,and temperature on the streaming and Zeta potential of the membranes were studied.The permeateflux and the retention rate under different nanofiltration operating conditions were also investigated.The results show that the higher pressure,feed concentration,temperature,and lower crossflow velocity lead to the higher absolute value of streaming and Zeta potential.The permeateflux of the nanofiltration decreases with the feed concentration and increases with not only the pressure but also the crossflow velocity and temperature.The higher the pressure and the crossflow velocity,the higher the retention rate.The lower feed concentration and higher temperature leads to lower retention rate.The effects of the operating conditions on the permeateflux and the retention rate were explained by the variation of the membrane charge property.
文摘We prove that the invariant locus of the involution associated with a general double EisenbudPopescu-Walter(EPW)sextic is a constant cycle surface and introduce a filtration on CH1of a Gushel-Mukai fourfold.We verify the sheaf/cycle correspondence for sheaves supported on low-degree rational curves,parallel to the case of cubic fourfolds of Shen-Yin’s work.
基金supported by a grant from Xuzhou Municipal,China
文摘BACKGROUND:Acute liver failure(ALF) caused by viral and non-viral hepatitis is often accompanied with severe metabolic disorders,the accumulation of toxic substances and continuous release and accumulation of a large number of endogenous toxins and inflammatory mediators. The present study aimed to investigate the effects of various combined non-biological artif icial liver treatments for patients with acute liver failure(ALF) complicated by multiple organ dysfunction syndrome(MODS).METHODS:Thirty-one patients with mid- or late-stage liver failure complicated by MODS(score 4) were randomly divided into three treatment groups:plasmapheresis(PE) combined with hemoperfusion(HP) and continuous venovenous hemodiafiltration(CVVHDF),PE+CVVHDF,and HP+CVVHDF,respectively. Heart rate(HR) before and after treatment,mean arterial pressure(MAP),respiratory index(PaO2/FiO2),hepatic function,platelet count,and blood coagulation were determined.RESULTS:Signifi cant improvement was observed in HR,MAP,PaO2/FiO2,total bilirubin(TBIL) and alanine aminotransferase(ALT) levels after treatment(P<0.05). TBIL and ALT decreased more signifi cantly after treatment in the PE+CVVHDF and PE+HP+CVVHDF groups(P<0.01). Prothrombin time(PT) and albumin were signifi cantly improved only in the PE+CVVHDF and PE+HP+CVVHDF groups(P<0.05). TBIL decreased more significantly in the PE+HP+CVVHDF group than in the HP+CVVHDF and PE+CVVHDF groups(P<0.05). The survival rate of the patients was 58.1%(18/31),viral survival rate 36.4%(4/11),and non-viral survival rate 70%(14/20).CONCLUSION:Liver function was relatively improved after treatment,but PE+HP+CVVHDF was more efficient for the removal of toxic metabolites,especially bilirubin. The survival rate was signifi cantly higher in the patients with non-viral liver failure than in those with viral liver failure.
文摘BACKGROUND： The study aimed to investigate the clinical characteristics of acute renal failure（ARF） caused by oral acyclovir.METHODS： A 45-year-old Chinese male patient with acyclovir-induced ARF suffered fromabdominal pain for one day. The pain was extended to the epigastric area from the right lowerquadrant. Transient oliguria was seen in addition to microscopic hematuria and proteinuria. Theserum creatinine concentration was 304 !mol/L. Eight days before the occurrence of ARF, the patienttook oral acyclovir for facial neuritis.RESULTS： His renal function was restored completely following the discontinuation of acyclovir,with continuous renal replacement therapy for 54 hours and some symptomatic treatment.CONCLUSION： The presentation of acute renal failure caused by acyclovir can be diverse, butthe prognosis is good after active treatment.
