首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   3篇
  基础理论   3篇
  2014年   1篇
  2013年   1篇
  1998年   1篇
排序方式: 共有3条查询结果,搜索用时 31 毫秒
1
1.
大豆皂甙复合物抑制猴免疫缺陷病毒活性的观察   总被引:8,自引:0,他引:8  
以猴免疫缺陷病毒(SIV)为靶病毒和相应的CEMx174细胞系统为模型,以AZT为阳性对照药物,观察了从大豆提取的皂甙复合物及大豆胰蛋白酶抑制剂对细胞病变的影响.结果表明,大豆皂甙复合物具有明显的抗SIV作用,而大豆胰蛋白酶抑制剂则无抗SIV作用.  相似文献
2.
Subcellular distributions and chemical forms of cadmium (Cd) in the leaves, stems and roots were investigated in low-Cd accumulation cultivars and high-Cd accumulation cultivars ofpakchoi (Brassica chinensis L.). Root cell wall played a key role in limiting soil Cd from entering the protoplast, especially in the low-Cd cultivars. The high-Cd cultivars had significantly higher leaf and stem Cd concentrations than the low-Cd cultivars in cell wall fraction, chloroplast/trophoplast fraction, organelle fraction and soluble fraction. In low-Cd cultivars, which were more sensitive and thus had greater physiological needs of Cd detoxification than high-Cd cultivars, leaf vacuole sequestrated higher proportions of Cd. Cd in the form of pectate/protein complexes (extracted by 1 tool. L~ NaC1) played a decisive role in Cd translocation from root to shoot, which might be one of the mechanisms that led to the differences in shoot Cd accumulation between the two types of cultivars. Furthermore, the formation of Cd- phosphate complexes (extracted by 2% HAc) was also involved in Cd detoxification within the roots of pakchoi under high Cd stress, suggesting that the mechanisms of Cd detoxification might be different between low- and high-Cd cultivars.  相似文献
3.
将乙酸乙烯酯、马来酸酐和丙烯酸作为功能性单体,在钠基膨润土分散体系中进行原位共聚反应,制备了一种膨润土基共聚复合物(P(MAVM)/NaB),采用FT-IR、XRD、SEM等手段对其结构进行了表征.结果表明,NaB与共聚物均匀复合,其中部分高分子链进入了膨润土层间,扩大了缝隙.将膨润土基共聚复合物用于染料亚甲基蓝(MB)的吸附,考察了影响膨润土基共聚复合物吸附亚甲基蓝的主要因素.结果表明:25℃,吸附剂用量为0.1 g.L-1,振荡5 min,MB初始浓度为20 mg.L-1的条件下,MB脱色率可达97.7%,吸附容量达195.46 mg.g-1.处理后水样的色度达到国家污水综合排放一级标准.同时研究了吸附机理,结果发现:吸附过程符合准二级动力学模型,MB通过电中和、氢键及范德华力作用被P(MAVM)/NaB吸附.  相似文献
1
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号