The correlation of plating structure with the antioxygenation of micro Cu-Ag bimetallic powder was studied by SEM、XRD、TG and other means.It was found that copper powder plated with silver having an interspersion str...The correlation of plating structure with the antioxygenation of micro Cu-Ag bimetallic powder was studied by SEM、XRD、TG and other means.It was found that copper powder plated with silver having an interspersion structure posesses antioxygenation at normal atmospheric temperature as surface Ag content reaches above 15.22%,the temperature of oxidation resistance varies with the surface Ag content.The greater the surface Ag content is,the higher the temperature of antioxygenation for bimetalic powder with the plating interspersion structure.The copper powder plated by silver with full packaging structure can not be oxidized even at展开更多
Two series of cationic polyacrylamide of quaternary pyridine salt-type were synthesized, which have different cationic degrees and molecular weights respectively. The antibacterial property of QPAV was investigated, t...Two series of cationic polyacrylamide of quaternary pyridine salt-type were synthesized, which have different cationic degrees and molecular weights respectively. The antibacterial property of QPAV was investigated, the influence of various factors on the antibacterial property was examined by using E. Coli as the disease-leading bacterium and the method of plate counting live bacterium. The antibacterial mechanism of QPAV was studied by using the method of measuring the activity of β-D-galactosidase. The experiment results show that QPAV possesses an excellent antibacterial property. The higher the cationic degree of QPAV is, the stronger the antibacterial property is. In certain range of molecular weight, the higher molecular weight of QPAV is, the better the antibacterial effect is. The pH value also influences the antibacterial property of QPAV. The antibacterial effect of QPAV is based on sterilization action certainly and is not only a restraining action.展开更多
基于分子设计,以氯甲基化聚砜（CMPSF）为基膜,阴离子单体对苯乙烯磺酸钠（SSS）为功能单体,N,N＇-亚甲基双丙烯酰胺（MBA）为交联剂,在表面引发体系-NH2/S2O2-8的作用下,采用＂接枝聚合与分子印迹同步进行＂的分子表面印迹新技术,制备...基于分子设计,以氯甲基化聚砜（CMPSF）为基膜,阴离子单体对苯乙烯磺酸钠（SSS）为功能单体,N,N＇-亚甲基双丙烯酰胺（MBA）为交联剂,在表面引发体系-NH2/S2O2-8的作用下,采用＂接枝聚合与分子印迹同步进行＂的分子表面印迹新技术,制备了接枝型农药抗蚜威分子印迹膜（MIM）。采用红外光谱（FITR）和光学显微镜（OM）对该分子印迹膜进行表征,通过等温结合实验与竞争吸附实验,考察了抗蚜威分子印迹膜的分子识别性能与机理。以该印迹膜作为敏感膜,构建了抗蚜威电位型传感器,并对其检测性能进行了考察。结果表明,所制备的接枝型印迹膜对模板抗蚜威分子具有特异的识别选择性和优良的结合亲和性,结合容量高达92μg/cm2,相对于分子结构与抗蚜威相似的阿特拉津,印迹膜对抗蚜威的选择性系数为4.537。在p H 4.0的水介质中,传感器膜电极的电位响应与抗蚜威浓度对数在1.0×10-6~1.0×10-3mol/L范围内呈良好的线性关系（r=0.999 9）,其检出限为2.5×10-8mol/L;以抗蚜威分子印迹膜为敏感膜所构建的电位型传感器,其构建过程简捷,检测灵敏准确,电位响应快速（t〈10 s）。展开更多
文摘The correlation of plating structure with the antioxygenation of micro Cu-Ag bimetallic powder was studied by SEM、XRD、TG and other means.It was found that copper powder plated with silver having an interspersion structure posesses antioxygenation at normal atmospheric temperature as surface Ag content reaches above 15.22%,the temperature of oxidation resistance varies with the surface Ag content.The greater the surface Ag content is,the higher the temperature of antioxygenation for bimetalic powder with the plating interspersion structure.The copper powder plated by silver with full packaging structure can not be oxidized even at
文摘Two series of cationic polyacrylamide of quaternary pyridine salt-type were synthesized, which have different cationic degrees and molecular weights respectively. The antibacterial property of QPAV was investigated, the influence of various factors on the antibacterial property was examined by using E. Coli as the disease-leading bacterium and the method of plate counting live bacterium. The antibacterial mechanism of QPAV was studied by using the method of measuring the activity of β-D-galactosidase. The experiment results show that QPAV possesses an excellent antibacterial property. The higher the cationic degree of QPAV is, the stronger the antibacterial property is. In certain range of molecular weight, the higher molecular weight of QPAV is, the better the antibacterial effect is. The pH value also influences the antibacterial property of QPAV. The antibacterial effect of QPAV is based on sterilization action certainly and is not only a restraining action.
文摘基于分子设计,以氯甲基化聚砜（CMPSF）为基膜,阴离子单体对苯乙烯磺酸钠（SSS）为功能单体,N,N＇-亚甲基双丙烯酰胺（MBA）为交联剂,在表面引发体系-NH2/S2O2-8的作用下,采用＂接枝聚合与分子印迹同步进行＂的分子表面印迹新技术,制备了接枝型农药抗蚜威分子印迹膜（MIM）。采用红外光谱（FITR）和光学显微镜（OM）对该分子印迹膜进行表征,通过等温结合实验与竞争吸附实验,考察了抗蚜威分子印迹膜的分子识别性能与机理。以该印迹膜作为敏感膜,构建了抗蚜威电位型传感器,并对其检测性能进行了考察。结果表明,所制备的接枝型印迹膜对模板抗蚜威分子具有特异的识别选择性和优良的结合亲和性,结合容量高达92μg/cm2,相对于分子结构与抗蚜威相似的阿特拉津,印迹膜对抗蚜威的选择性系数为4.537。在p H 4.0的水介质中,传感器膜电极的电位响应与抗蚜威浓度对数在1.0×10-6~1.0×10-3mol/L范围内呈良好的线性关系（r=0.999 9）,其检出限为2.5×10-8mol/L;以抗蚜威分子印迹膜为敏感膜所构建的电位型传感器,其构建过程简捷,检测灵敏准确,电位响应快速（t〈10 s）。
