N,N-dimethyldodecylamine,hydrochloride and epichlorohydrin (molar ration is 2:1:1) were used to synthesize bis-quateary ammonium Gemini surfactant with a hydrox
Polyaniline (PANI)/polysulfone (PSF) composite films are successfully prepared by phase separation and one-step in-situ polymerization.It is found that the head
数字在新闻中常常见到,特别是经济类新闻,可以说是每篇必有。从信息论角度讲,用数字计量信息,它最能消除人们对于那些数量方面的不确定性;用数字语言说话可以准确地反映事物
蓖麻作为“绿色石油”,被广泛应用于化工,航空航天等多个领域,其开发具有广泛的前景。但由于蓖麻籽中含有多种剧毒物质,如蓖麻毒蛋白、凝集素等,极大的限制了蓖麻的综合利用
A grain of unexpected mineral composed of FeO (wiistite) and SiO2 (quartz) with au intergrowth structure was found in ophiolitic chromitite, Luobusa, Tibet. Acc
棉花(Cotton)不仅是农业生产中的重要经济作物,也是纺织工业的重要原料作物之一,其产量和品质的提高是棉花产业发展的根本目的。本文以两个硼效率不同棉花品种抗虫棉和渝棉一号为材料,以渝棉一号为对照,将两个材料按施加不同浓度硼肥(0,0.1%,0.3%)分为三个处理,将试验田分为6个小区,在1、3、5种植抗虫棉,2、4、6小区种植渝棉一号。对1、2小区不施用硼肥(B_0);3、4小区施用0.1%浓度
A kind of biodegradable material,poly(ε-caprolactone-co-lactic acid) [P(CL-co-LA)] was synthesized via the direct melting polycondensation of lactic acid (LA)a
2008年7月初,国际大宗商品市场从最高点回落,金融风暴爆发后更是加速下跌,跌势持续近半年,多数品种被“腰斩”.然而,在2008年年底,国际大宗商品市场底部显现,之后走上一条上
(E)-3-(2-chlorophenyl)- 1-(2,4-dichlorophenyl) prop-2-en-1-one was prepared from 2-chlorobenzalde-hyde followed by cyclization with hydrazine monohy-drate. Eigh
A new environmentally friendly catalyst,H4Si W12O40-polyaniline(PAn),was prepared,and n-butyraldehyde 1,2-propanediol acetal was synthesized from nbutyraldehyde