期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
聚D,L-乳酸的体外可降解性能 被引量:1
1
作者 舒静 任丽丽 +2 位作者 王鹏 王鉴 王刚 《高分子材料科学与工程》 EI CAS CSCD 北大核心 2008年第6期100-103,共4页
研究了中等分子量(-Mη=1.10×105)的聚D,L-乳酸在体外不同环境中的可降解性能,包括不同pH值溶液(37℃)和自然土壤。降解性能采用失重率、分子量变化、溶液pH值变化等来进行评价,并对试样表面形貌采用扫描电镜(SEM)进行了观察。结... 研究了中等分子量(-Mη=1.10×105)的聚D,L-乳酸在体外不同环境中的可降解性能,包括不同pH值溶液(37℃)和自然土壤。降解性能采用失重率、分子量变化、溶液pH值变化等来进行评价,并对试样表面形貌采用扫描电镜(SEM)进行了观察。结果表明:聚D,L-乳酸在体外环境中具有良好的可降解性,受降解环境的影响较大;失重和分子量的减小并不平行;在不同pH值溶液和土壤中的分子量变化在一定时间内符合一级反应动力学,且随溶液pH值的增大,降解速率减小。 展开更多
关键词 聚D L-乳酸 体外可降解性 降解动力学
下载PDF
In Vitro Antimicrobial Activity Study of Some New Arginine-based Biodegradable Poly (Ester Urethane)s and Poly (Ester Urea)s
2
作者 Darejan Kharadze Tamar Memanishvili +4 位作者 Ketevan Mamulashvili Tina Omiadze Larisa Kirmelashvili Zaur Lomtatidze Ramaz Katsarava 《Journal of Chemistry and Chemical Engineering》 2015年第8期524-532,共9页
Bactericidal activity of some arginine based biodegradable polymers-PEURs (poly (ester urethane)s) and PEUs (poly (ester urea)s) with low cytotoxicity was studied in in vitro experiments. Various bacterial str... Bactericidal activity of some arginine based biodegradable polymers-PEURs (poly (ester urethane)s) and PEUs (poly (ester urea)s) with low cytotoxicity was studied in in vitro experiments. Various bacterial strains both Gram-positive and Gram-negative were used to explore the bactericidal activity of the cationic polymers. As the test objects, the following microorganisms were used: Bacillus subtilis, Staphylococcus aureus, Mycobacterium album, Pseudomonas fluorescens, Escherichia coli, Actinomyces griseus and Aspergillus niger. The obtained results showed that the new cationic polymers suppressed the growth of the studied microorganisms and the bactericidal activity of the tested cationic polymers strongly depending on their chemical structure. 展开更多
关键词 ARGININE cationic polymer poly (ester urethane) poly (ester urea) bactericidal activity
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部