查询词典 acetic aldehyde

Advances on the development of new oxidation reagents and methodologies and their applications in both target-and diversity-oriented synthesis have been regularly surveyed and constituted one of the most extensively and actively investigated areas of current organic synthesis.1 In this context,a plethora of oxidants,including those small organic molecule-based reagents (such as Dess-Martin periodinane,Swern oxidation,Moffatt oxida- tion,Corey-Kim oxidation,and 三氧化硫/pyridine)and metal-based systems(such as Jones reagent,Collins reagent,pyridinium chlorochromate,pyridinium dichromate,barium permanganate, manganese dioxide,ruthenium tetroxide,silver carbonate,and Oppenauer oxidation),have been identified to be powerful tools promoting conversion of various alcohols into their corresponding aldehyde or ketone products and thus evolved as a most important class of tools in synthetic chemists'arsenal.

关于新的氧化试剂和方法，在两个目标和多样性为导向的发展及其应用合成的进步定期调查，构成一个最广泛，积极探讨在这方面，过多的地区目前有机合成。1氧化剂，包括有机小分子为基础的试剂（如Dess - Martin氧化剂，斯文氧化反应，氧化法特，科里，金氧化，三氧化硫/吡啶）和金属为基础的系统（如琼斯试剂，柯林斯试剂，吡啶氯铬，吡啶铬，钡锰，二氧化锰，四氧化钌，银碳酸盐和开瓶器氧化），已被证实为推动中相应的醛或酮醇转化的各种产品，功能强大的工具，因而作为一个最重要的阶级演变在阿森纳的工具合成化学家。

The conversion of benzyl alcohol and the selectivity of benzyl aldehyde reached to 63.2% and 89.1%, respectively, after catalyst was used for four times.

催化剂重复使用4次后，苯甲醇的转化率和苯甲醛的选择性分别为63.2%、89.1%。

With Ti(30)/W(400)-HMS as catalyst, at n:n=1:2,ω=4%, and the reaction time 5 h, the conversion of benzyl alcohol and the selectivity of benzyl aldehyde reached to 72.6% and 96.9%, respectively.

利用Ti(30)/W(400)-HMS为催化剂，当n：n(H2O2)=1：2、ω=4%、反应时间为5 h时，苯甲醇的转化率和苯甲醛的选择性分别为72.6%、96.9%。

In the first part,we studied the nucleophilic addition reactions of aldehyde, amine,Zinc and benzyl bromide in one pot to afford homobenzyl and homoallyl amines in moderate to good yields.

第一部分的工作中，我们研究了Barbier型条件下醛，胺，锌粉，溴试剂一锅法的亲核加成反应。这种反应可以高效的得到高苄基和高烯丙基胺类化合物。

A pH-responsive controlled releasing carrier for medicine is a chitosan-base gel which is prepared from Chitosan, gelatin and pectin through cross-linking by aldehyde cross-linking agents, and features obvious pH dependency, high biocompatibility and abling to biologically degradate. It can be used for detention-type controlled releasing medicines to avoid toxic' by-effect due to excess dosage.

一种pH响应性药物控释载体，采用壳聚糖、明胶和果胶等天然高分子材料用醛类交联剂共交联合成了壳聚糖基凝胶，用该凝胶制备的药物释放体系呈明显的pH依赖性，用于口服抗酸、治疗胃肠疾患的滞留型控释制剂，可避免释放药量过度导致的毒副作用，且该控释载体生物相容性好、可生物降解。

Papers in the experimental part of our literature considered on the basis of the experimental exploration, and podophyllotoxin intermediates with the structural characteristics of a simple pepper aldehyde as the starting material,α,β-unsaturated carbonyl compounds are selective reduction lithium aluminum hydrogen reduction reaction as the key steps to have the Knoevenagel condensation, peracetic acid epoxy between chlorine and alkaline hydrogen peroxide epoxy, DCC condensation esterification reaction of the three podophyllotoxin intermediates.

论文实验部分我们在综合考虑文献的基础上，经过实验摸索，并结合鬼臼毒素中间体的结构特点以简单的胡椒醛为起始原料，对α，β-不饱和羰基化合物具有选择性还原的锂铝氢还原反应为关键步骤，先后经过Knoevenagel缩合，间氯过氧苯甲酸环氧化，碱性过氧化氢环氧化，DCC缩合酯化等反应合成了3个鬼臼毒素中间体。

Tanning method of classification according to chrome-tanned leather, vegetable tanning leather, aldehyde tanning and the combination of tanning.

按鞣制方法分类有铬鞣革、植鞣革、醛鞣革和结合鞣革。

Methods: 60 freshly extracted , single-rooted premolars were randomly divided into two experimental groups (cinnamic aldehyde, gallnut decoction) and four control group (FC group, calcium hydroxide mixed with propylene glycol group, negative the control group and positive control group),.

标本牙去除牙冠部及根尖部，留取6mm长牙根，50颗牙建立粪肠球菌根管感染模型后，20颗牙根管内分别放置桂皮醛、五倍子水煎剂，另30颗感染根管放置FC、氢氧化钙丙二醇糊剂和生理盐水。

The preparation technique of aldehyde acetals energetic plasticizers BDNPF and BDNPA is introduced.Their physico-chemical properties,energy characteristics,thermol performance and application in the formulations of explosives and prope...

重点介绍缩醛类含能增塑剂BDNPF和BDNPA的制备技术，论述了其物理化学性能、能量特性和热性能，以及在炸药、推进剂配方中的应用，指出此类化合物的合成及应用，将是含能增塑剂研究的重点。

Shrinked aldehyde drying glue and soldering tin is two kinds of adhesive materials used for adhibiting and fixing the pieces of ferrite on the inner wall of the shell of microwave ferrite devices.

易容平（华东电子工程研究所，安徽合肥 230031）摘要：缩醛烘干胶和焊锡是微波铁氧体器件中常用的两种粘接材料，用于铁氧体片在器件壳体内壁既定位置上的固定。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48