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
研制成功一种对 CO2 具有促进传递作用的新型膜材料——聚乙烯胺。将此膜材料覆盖在聚砜膜表面制成复合膜。考察了复合膜的多层结构 ,复合膜对 CO2 、CH4、N2 等的吸着性能 ,及复合膜对 CO2 和 CH4的分离透过性能。结果表明 ,该复合膜对...研制成功一种对 CO2 具有促进传递作用的新型膜材料——聚乙烯胺。将此膜材料覆盖在聚砜膜表面制成复合膜。考察了复合膜的多层结构 ,复合膜对 CO2 、CH4、N2 等的吸着性能 ,及复合膜对 CO2 和 CH4的分离透过性能。结果表明 ,该复合膜对 CO2 有很高的吸着量 ,而对其他测试气体仅有极微弱的吸着 ;对 CO2 /展开更多
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.
文摘研制成功一种对 CO2 具有促进传递作用的新型膜材料——聚乙烯胺。将此膜材料覆盖在聚砜膜表面制成复合膜。考察了复合膜的多层结构 ,复合膜对 CO2 、CH4、N2 等的吸着性能 ,及复合膜对 CO2 和 CH4的分离透过性能。结果表明 ,该复合膜对 CO2 有很高的吸着量 ,而对其他测试气体仅有极微弱的吸着 ;对 CO2 /
