NEURAI NETWORKS IN Q. S. A. R STUDIES:Estimation and prediction of The anticonvuisant activities of

来源 :数理医药学杂志 | 被引量 : 0次 | 上传用户:EAGLE1205
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Neural Networks (NN ) Method was used to study The structure - activity relationship (S. A. R ) of cinnamamide derivatives. The relationship between biological activity (P. C) and thosc parameters such as the Partition coefficients(log p octanol/water) of the compounds Hammett 8 constants and steric parameter(M. R) of cinnamamides were investigated by the modified backpropagation (MBP) Neural Netwoks. The biological activity of cinnamamides derivatives thus estimated and predicted 100% fit with MLP Method. The resalts obtined by the developed MBPNN Method Seem to be better than those by Multivariate linear regression (MLR). The neural Networks Method might therefore be regarded as an excellent and effective chemometric Modelling technique for estim ating and predicting biological cativity on basic Q. S. A. R studies. The relationship between biological activity (P. C) and thosc parameters such as the Partition coefficients (log p octanol / water) of the compounds Hammett 8 constants and steric parameter (M. R) of cinnamamides were investigated by the modified backpropagation (MBP) Neural Netwoks. The biological activity of cinnamamides derivatives thus estimated and predicted 100% fit with MLP Method. The resalts obtined by the developed MBPNN Method Seem to be better than those by Multivariate linear regression (MLR). The neural Networks Method might therefore be ide as an excellent and effective chemometric modeling technique for estim ating and predicting biological cativity on basic QSA R studies.
其他文献
近于我省市場上見有摻伪蜂蜡出现。我們在实驗中找到几种簡便鑑別的方法,特写出以供中药材公司收購同志、药房等同志工作中的参考。蜂蜡中用以摻杂者,就目前檢查所知,主要
在防疫措施中,防止传染病的带菌者,是具有特别重大的意义的。现在已研究出防止室内昆虫的方法。化学药剂中最有效的药剂是滴滴涕和六六六。在自然条件下防止吸血的节足动物
以细胞化学或者组织化学测定细胞内含物质的定性、定量,一般是在显微分光光度上测定相对含量。我们以XFG-01型显微分光光度计(国产)用单波长法,测定豚鼠曲细精管内的初级精
[译文]药物的来源人类最初所认识的药物是从自然来源获得的;它们或来自诸如罂粟(鸦片)和毛地黄(洋地黄)一类植物,或者就是诸如泻盐和砷一类的简单无机物质。此后,由于有机化
紫花洋地黄叶(Digitalis purpura L.)内含有多种强心甙类,是一种重要的强心药物。把它磨成粉,加入适量的水(约1:1),在20—25℃的温度下放置24小时进行酦酵水解后,用有机溶媒
赤芍水提物2g/kg 和70%乙醇提物0.5g/kg 或环磷酰胺2.5mg/kg 单独腹腔注射对 S-180实体瘤的生长没有明显影响,但赤芍两个提取物分别与环磷酰胺合用则明显增强抑制肿瘤生长的
抗癫癎新药香荚兰醛鉴定会于1月15日在江苏省卫生厅组织下召开。 1965年,南京药学院在研究天麻工作中受到启发,合成具有抗癎作用的香荚兰醛,其化学结构与目前市场上大量供应
乌梅是蔷薇科植物梅(Prunus mume)经加工后的果实,植物为落叶小乔木,干高丈余。叶卵圆形,头尖锐,有锯齿。二月开白色或红色花,五瓣,香味甚浓。花后结果即青梅,初呈青色,入夏
金钱草用作治疗肾结石,已经取得显著的效果,但是各地金钱草,多不是同一植物,已见调查报告。为了用药的安全和有效,今将重庆金钱草在主要产区的生长、形态、和采收时易于混淆
我厂酊制車间为將酊剂药渣中回收的醇加以利用,曾进行了一些試驗工作,在長期生产的体会,我們認为有的收回醇可以直接用到生产上去,如远志酊,但有的是很不适当的,如橙皮、复