Employing crystal facets to regulate the catalytic properties in electrocatalytic carbon dioxide reduction reaction(eCO_(2)RR)has been well demonstrated on electrocatalysts containing single metals but rarely explored...Employing crystal facets to regulate the catalytic properties in electrocatalytic carbon dioxide reduction reaction(eCO_(2)RR)has been well demonstrated on electrocatalysts containing single metals but rarely explored for bimetallic systems.Here,we synthesize ZnSn(OH)_(6)(ZSO)microcrystals(MCs)with distinct facets and investigate the facet effects in eCO_(2)RR.Electrochemical studies and in situ Fourier Transform Infrared Spectroscopy(in situ-FTIR)reveal that ZSO MCs produce mainly C1 products of HCOOH and CO.The{111}facet of the ZSO MCS exhibits higher selectivity and faradaic efficiency(FE)than that of the{100}facet over a wide range of potentials(-0.9 V∼-1.3 V versus RHE).Density Functional Theory(DFT)calculations elucidate that the{111}facet is favorable to the adsorption/activation of CO_(2)molecules,the formation of intermediate in the rate-determining step,and the desorption of C1 products of CO and HCOOH molecules.展开更多
目的:分析肾脏损伤因子-1(KIM-1)、胱抑素C(Cys-C)及β_(2)-微球蛋白(β_(2)-MG)的检测对慢性阻塞性肺疾病急性加重期(AECOPD)患者早期肾功能损伤的评估价值及临床意义。方法:选定南京市浦口区中心医院呼吸内科确诊的300例AECOPD患者,...目的:分析肾脏损伤因子-1(KIM-1)、胱抑素C(Cys-C)及β_(2)-微球蛋白(β_(2)-MG)的检测对慢性阻塞性肺疾病急性加重期(AECOPD)患者早期肾功能损伤的评估价值及临床意义。方法:选定南京市浦口区中心医院呼吸内科确诊的300例AECOPD患者,将其设为AECOPD组,另选取同期浦口区中心医院门诊体检中心100例健康体检者,将其设为健康组。根据血气分析氧分压(PaO_(2))检测结果将AECOPD患者分为三组,分别是Ⅰ级组(60 mm Hg<PaO_(2)≤80 mm Hg)、Ⅱ级组(40 mm Hg<PaO_(2)≤60 mm Hg)、Ⅲ级组(PaO_(2)≤40 mm Hg)。检测并比较AECOPD组、健康组尿KIM-1、血清β_(2)-MG、Cys-C、肌酐(SCr)、尿素氮(BUN)。根据肾小球滤过率(eGFR)将AECOPD患者分为两组,eGFR≥90 ml/(min·1.73 m^(2))的120例患者为肾功能正常组,eGFR<90 ml/(min·1.73 m^(2))的180例患者为早期肾功能损伤,比较两组尿KIM-1、血清β_(2)-MG、Cys-C、SCr、BUN,Pearson相关性分析KIM-1、β_(2)-MG、Cys-C与SCr、BUN的相关性。结果:Ⅲ级组尿KIM-1、血清β_(2)-MG、Cys-C、SCr、BUN均高于Ⅱ级、Ⅰ级、健康组(P<0.05)。早期肾功能损伤组尿KIM-1、血清β_(2)-MG、Cys-C、SCr、BUN均高于肾功能正常组(P<0.05)。KIM-1、β_(2)-MG、Cys-C与SCr、BUN均呈正相关性(P<0.05)。结论:AECOPD早期肾功能损伤患者尿KIM-1、血清β_(2)-MG、Cys-C水平均较高,与患者肾功能受损程度联系密切,具有一定的参考价值。展开更多
Objective:To do mapping and modeling of conformational B cell epitope regions of highly conserved and protective regions of three merozoitecandidate vaccine proteins of Plasmodium vivax(P.vivax),ie.merozoite purface p...Objective:To do mapping and modeling of conformational B cell epitope regions of highly conserved and protective regions of three merozoitecandidate vaccine proteins of Plasmodium vivax(P.vivax),ie.merozoite purface protein-1(PvMSP-1),apical membrane antigen-1 domainⅡ(PvAMA1-DⅡ)and regionⅡof the Duffy binding protein(PvDBPⅡ).and to analyze the immunogenie properties of these predicted epitopes.Methods:3-D structures of amino acid haplotypes from Sri Lanka(available in GeneBank)of PvMSP-1_(19)(n=27),PvAMA1-DⅡ(n=21)and PvDBPⅡ(n=33)were modeled.SEPPA,selected as the best online server was used for conformational epitope predictions,while prediction and moodeling of protein structuve and properties related to immunogenicity was carried out with Geno3D server.SCRATCH Protein Server,NetSurfP Server and standaloneroftware,Genious 5.4.4.Results:SEPPA revealed that regions of predicted conformational epitopes formed 4 clusters in PvMSP-I_(19),and 3 clusters each in PvAMA1-DⅡand PvDBPⅡ,all of which displayed a high degree of hydrophilicity,contained solveut exposed residues,displayed high probability of antigenicity and showed positive antigenic propensity values,that indicated high degree of immunogenicity.Conclusions:Findings of this study revealed and confirmed that different parts of the sequences of each of the conserved regions of the three selected potential vaccine candidate antigens of P.vivax are important with regard to conformational epitope prediction that warrants further laboratory experimental invertigations in in vivo animal models.展开更多
α_(s1)-Casein is a potential allergen to induce hypersensitivity in cow milk.We had identifiedα_(s1)-casein and its epitopes in previous studies.The present study aimed to evaluate the allergic mechanism ofα_(s1)-c...α_(s1)-Casein is a potential allergen to induce hypersensitivity in cow milk.We had identifiedα_(s1)-casein and its epitopes in previous studies.The present study aimed to evaluate the allergic mechanism ofα_(s1)-casein in a BALB/c mouse model.The levels of specific IgE,mast cell proteinase,histamine and cytokines in sensitized mice were determined,and the clinical and pathological observation were evaluated.Results showed that the levels of specific IgE,mast cell proteinase,histamine,IL-4,IL-5,IL-10 increased significantly with a dose-dependent trend.The local alveolar septum collapsed or thickened,and lymphatic foci were produced in the spleen and thymus,and the inflammatory cells infiltrated in small intestinal mucosa mesenchyme.In conclusion,the levels of specific IgE,mast cell proteinase,histamine,IL-4,IL-5,IL-10 and some inflammatory factors could possibly serve as allergic biomarkers ofα_(s1)-casein,however,additional studies on signal transduction and gene expression are necessary in future.展开更多
基金the Fundamental Research Funds for the Central Universities and the Fundamental Science Research of Harbin Institute of Technology(No.AUGA2160100119,AUGA9803100120,AUGA5710001120).
文摘Employing crystal facets to regulate the catalytic properties in electrocatalytic carbon dioxide reduction reaction(eCO_(2)RR)has been well demonstrated on electrocatalysts containing single metals but rarely explored for bimetallic systems.Here,we synthesize ZnSn(OH)_(6)(ZSO)microcrystals(MCs)with distinct facets and investigate the facet effects in eCO_(2)RR.Electrochemical studies and in situ Fourier Transform Infrared Spectroscopy(in situ-FTIR)reveal that ZSO MCs produce mainly C1 products of HCOOH and CO.The{111}facet of the ZSO MCS exhibits higher selectivity and faradaic efficiency(FE)than that of the{100}facet over a wide range of potentials(-0.9 V∼-1.3 V versus RHE).Density Functional Theory(DFT)calculations elucidate that the{111}facet is favorable to the adsorption/activation of CO_(2)molecules,the formation of intermediate in the rate-determining step,and the desorption of C1 products of CO and HCOOH molecules.
文摘目的:分析肾脏损伤因子-1(KIM-1)、胱抑素C(Cys-C)及β_(2)-微球蛋白(β_(2)-MG)的检测对慢性阻塞性肺疾病急性加重期(AECOPD)患者早期肾功能损伤的评估价值及临床意义。方法:选定南京市浦口区中心医院呼吸内科确诊的300例AECOPD患者,将其设为AECOPD组,另选取同期浦口区中心医院门诊体检中心100例健康体检者,将其设为健康组。根据血气分析氧分压(PaO_(2))检测结果将AECOPD患者分为三组,分别是Ⅰ级组(60 mm Hg<PaO_(2)≤80 mm Hg)、Ⅱ级组(40 mm Hg<PaO_(2)≤60 mm Hg)、Ⅲ级组(PaO_(2)≤40 mm Hg)。检测并比较AECOPD组、健康组尿KIM-1、血清β_(2)-MG、Cys-C、肌酐(SCr)、尿素氮(BUN)。根据肾小球滤过率(eGFR)将AECOPD患者分为两组,eGFR≥90 ml/(min·1.73 m^(2))的120例患者为肾功能正常组,eGFR<90 ml/(min·1.73 m^(2))的180例患者为早期肾功能损伤,比较两组尿KIM-1、血清β_(2)-MG、Cys-C、SCr、BUN,Pearson相关性分析KIM-1、β_(2)-MG、Cys-C与SCr、BUN的相关性。结果:Ⅲ级组尿KIM-1、血清β_(2)-MG、Cys-C、SCr、BUN均高于Ⅱ级、Ⅰ级、健康组(P<0.05)。早期肾功能损伤组尿KIM-1、血清β_(2)-MG、Cys-C、SCr、BUN均高于肾功能正常组(P<0.05)。KIM-1、β_(2)-MG、Cys-C与SCr、BUN均呈正相关性(P<0.05)。结论:AECOPD早期肾功能损伤患者尿KIM-1、血清β_(2)-MG、Cys-C水平均较高,与患者肾功能受损程度联系密切,具有一定的参考价值。
文摘Objective:To do mapping and modeling of conformational B cell epitope regions of highly conserved and protective regions of three merozoitecandidate vaccine proteins of Plasmodium vivax(P.vivax),ie.merozoite purface protein-1(PvMSP-1),apical membrane antigen-1 domainⅡ(PvAMA1-DⅡ)and regionⅡof the Duffy binding protein(PvDBPⅡ).and to analyze the immunogenie properties of these predicted epitopes.Methods:3-D structures of amino acid haplotypes from Sri Lanka(available in GeneBank)of PvMSP-1_(19)(n=27),PvAMA1-DⅡ(n=21)and PvDBPⅡ(n=33)were modeled.SEPPA,selected as the best online server was used for conformational epitope predictions,while prediction and moodeling of protein structuve and properties related to immunogenicity was carried out with Geno3D server.SCRATCH Protein Server,NetSurfP Server and standaloneroftware,Genious 5.4.4.Results:SEPPA revealed that regions of predicted conformational epitopes formed 4 clusters in PvMSP-I_(19),and 3 clusters each in PvAMA1-DⅡand PvDBPⅡ,all of which displayed a high degree of hydrophilicity,contained solveut exposed residues,displayed high probability of antigenicity and showed positive antigenic propensity values,that indicated high degree of immunogenicity.Conclusions:Findings of this study revealed and confirmed that different parts of the sequences of each of the conserved regions of the three selected potential vaccine candidate antigens of P.vivax are important with regard to conformational epitope prediction that warrants further laboratory experimental invertigations in in vivo animal models.
基金supported by National Science and Technology Project in Rural Areas(China,2018YFC1604205)the National Natural Science Foundation of China(Beijing,China31872886)。
文摘α_(s1)-Casein is a potential allergen to induce hypersensitivity in cow milk.We had identifiedα_(s1)-casein and its epitopes in previous studies.The present study aimed to evaluate the allergic mechanism ofα_(s1)-casein in a BALB/c mouse model.The levels of specific IgE,mast cell proteinase,histamine and cytokines in sensitized mice were determined,and the clinical and pathological observation were evaluated.Results showed that the levels of specific IgE,mast cell proteinase,histamine,IL-4,IL-5,IL-10 increased significantly with a dose-dependent trend.The local alveolar septum collapsed or thickened,and lymphatic foci were produced in the spleen and thymus,and the inflammatory cells infiltrated in small intestinal mucosa mesenchyme.In conclusion,the levels of specific IgE,mast cell proteinase,histamine,IL-4,IL-5,IL-10 and some inflammatory factors could possibly serve as allergic biomarkers ofα_(s1)-casein,however,additional studies on signal transduction and gene expression are necessary in future.
