Three neolignans, (±)-demethylnitidanin(1), herpetol(2) and salvinal(3) were synthesized from methyl 4,5-dihydroxy-3-methoxy cinnamate or methyl 4-hydroxy-
Copolymers PMDAB-co-AA with excellent antibacterial activity were designed and prepared(MDAB/AA=methacryloxyethyldimethyl dodecyl ammonium bromide with acrylami
A method for the determination of human immunoglobulin G(IgG) based on a colloidal gold label by fluorospectrophotometry was developed. The sandwich immunoreact
我国是一个自然灾害种类多、发生频繁和危害严重的国家,工程建筑物的变形监测非常重要。测绘学科中,在多尺度变形分析方面,目前主要有小波分析和经验模态分解(EMD)算法,对其研究作了评述,对近年来提出的局部均值分解(local mean decomposition;LMD)方法的基本思想、在其他学科的应用研究和前景作了分析讨论,在测绘学科的多尺度变形分析提出了其应用研究的可能性。
Various aromatic α-keto esters were rapidly and selectively reduced to aromatic α-hydroxy esters by commercially available zinc dust and ammonium formate in t