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Synthesis of n-Alkylnaphthalenes via Semicarbazones
Alkylnaphthalenes Semicarbazones Wolff-Kishner reductions Alkyl-1-naphthyl ketones Grignard reaction
2010/4/19
A number of 1-n-alkylnaphthalenes were prepared via the respective semicarbazones. The semicarbazones were reduced by modified Wolff-Kishner reductions to give 1-n-alkylnaphthalenes in excellent yield...
Span/Tween混合表面活性剂微乳液制备纳米铁及脱硝研究
混合表面活性剂 微乳液 纳米铁 硝酸盐
2010/3/12
研究了以Span 80和Tween 60为混合表面活性剂的微乳液的形成。以电导率及目测法为表征手段，利用正交试验，分析了多因素对W/O型微乳液最大增容水量的影响，探明了该乳液形成的适宜条件。
间二苄胍衍生物的合成
胍 双胍 二胺 合成
2010/1/19
通过间二苄氯衍生物和二甲酰胺钠的亲核取代及水解方便地制备了相应的间二苄胺. 后者与甲基异硫脲作用生成间二苄胍硫酸盐,经离子交换得到相应的间二苄胍盐酸盐.
Purification and Characterization of Pear (Pyrus communis) Polyphenol Oxidase
Purification Characterization Polyphenol Oxidase
2010/4/20
Three isoenzymes of polyphenol oxidase (PPO) were isolated from a local pear variety (Ankara Armutu) through ammonium sulfate precipitation, dialysis and gel filtration. The sample obtained from dialy...
Cationic Rearrangements of an endo}-Cyclopropyl Methanol System Incorporated in a Benzonorbornadiene System
Alcohols Benzohomonorbornadiene Halogenation Rearrangement Thionyl chloride
2010/4/21
Chloride 18 (47%) and alcohol 21 (44%) were isolated from the reaction of alcohol 20 with SOCl2. Cyclopropylcarbinyl -- cyclopropylcarbinyl rearrangement leads to chloride 22, which hydrolyses on sepa...
Chemical Constituents of Linaria aucheri
Linaria aucheri Scrophulariaceae lypophylic compounds b-amyrin antirrinoside linariin
2010/4/21
From the petroleum ether and methanol extracts of the aerial parts of Linaria aucheri (Scrophulariaceae) 6 known compounds: b-amyrin (1), ergost-7-en-3b-ol (2), stigmasta-5,22- E-dien-3b -ol (3), stig...
Potentiometric and Spectroscopic Studies with Chromium(III) Complexes of Hydroxysalicylic Acid Derivatives in Aqueous Solution
Potentiometry equilibria chromium stability constants hydroxo complex
2010/4/21
The stoichiometries and stability constants of the chromium(III) complexes of hydroxysalicylic acid ligands (2,x-dihydroxy benzoic acids; 2,x-DHBA, x = 4-6)(H3L) were determined in aqueous solution by...
Extraction Equilibria of Nicotinic Acid Using Alamine 300/Diluent and Conventional Solvent Systems
Extraction equilibria Nicotinic acid Alamine 300 Modeling
2010/4/22
The distribution of nicotinic acid between water and Alamine 300 (tri-n-octylamine) dissolved in various (proton-donating and -accepting, polar and nonpolar) diluents, and a comparison with the extrac...