合成物质

A new, stereo-controlled method of aldehyde group synthesis is summarized, which is used to synthesize aldehyde group by introducing thiazole ring and has a wide appreciation for bio-activated compounds synthesis.

摘要本文综述了一种新型可立体控制的醛基合成方法––利用唑环引入醛基的方法以及它在具有生物活性物质合成中的应用。

The results indicated that the treatment of increasing top dressing N applying ratio could increase endogenous hormones zeatin riboside ZR(subscript S, isopentenyl adenosine contents and decrease abscise acid contents in flag leaves, and improve photosynthate synthesis, which could increase sucrose contents in flag leaves and supply aplenty of carbon sources for starch synthesis in grains.

结果表明，氮肥后移的处理旗叶中ZR、iPAS含量的增加及ABA含量的减少，有利于光合产物的合成；蔗糖含量较高，为籽粒合成淀粉提供了充足的碳源物质。

Some experimental techniques such as the dilution rate of flux and sample,preparation of sample with melting,the correction methods of the loss on ignition and the effects of enhancement and absorpt.

采用国家标准物质和以标准物质为基体添加纯试剂合成标样制作工作曲线；研究讨论了熔剂体系及样品的稀释比例、样品的熔融制备、烧失量和基体增强吸收效应的校正。

Chalcone synthase (CHS, EC 2. 3.1. 74), is the first key enzyme in the biosynthesis of plant flavonoids, and the key enzyme of plant secondary metabolism. It has great influence on plant physiological function.

查尔酮合成酶(chalcone synthase，CHS，EC 2.3.1.74)，是植物类黄酮物质合成途径中的第一个酶，也是植物次生代谢途径中的关键酶之一，对植物具有非常重要的生理意义。

Leptin is a hormone that regulates metabolic efficiency,energy expenditure.It is mainly produced in adipose.Now we acknowlege that leptin is also present in placenta.It can mediate the excretory function of cytotrophoblast and vascular growth. Leptin participates in pregnancy complication.

瘦素是由肥胖基因编码的调节能量代谢的物质，主要由脂肪细胞合成，现已证实胎盘也合成瘦素，可调节滋养细胞的分泌功能及胎盘血管的生成，与生殖及PIH等疾病密切相关。

A satisfactory result was obtained in synthesis that using the material of high reactivity and high valence such as PPh3I*. The research area of material in electrosynthesis has been extended.

本文还重点研究了非水体系中不含酸性氢原料(I_2)的电化学反应机理，提出以电化学反应活性强的高价氧化态物质(如PPh_3I~+)作为阴极反应原料，在合成中取得了满意的结果，拓展了非水介质配合物电化学合成原料的研究和应用范围。

As the results showed that the significant relation between TCBA and calcium or magnesium, mainly between glycocholic, glycochenocholic or taurocholic acids and calcium or magnesium, could be found in all three groups but there was not any obvious relation between TCBA and ferrum or zinc except between glycocholic acid and zinc in gallbladder stone group.

由此可见前列腺素在胆结石形成中占有重要地位。花生四烯酸是合成前列腺素的前体，它在环氧化酶作用下形成前列腺素。本研究证实在成石性胆囊胆汁中花生四烯酸的含量（0.09%）和阳性率（71.74%）明显高于对照组（0.02%，21.42%），P.05。说明成石性胆汁为合成前列腺素提供了前体物质。

As an intermediate for preparing vanillin derived from glyoxylic acid, 3, 4-dihydroxymandelic acid is synthesized based on condensation of catechol and glyoxylic acid in alkaline aqueous solution.

以邻苯二酚和乙醛酸为原料，在碱性条件下发生缩合反应，合成了3， 4-二羟基扁桃酸，此物质是多种香料和药物合成的重要中间体。

The myristic-2-hydroxy-3-propane sulfonic acid sodium salt was synthesized from sodium bisulfite, epichlorohydrin, sodium phosphate and myristic acid. The influence factors of temperature, amount of catalyst, reaction time and reactant ratio on conversion were studied.

以亚硫酸氢钠、环氧氯丙烷、磷酸钠和肉豆蒄酸等为原料，合成了肉豆蒄酸－2-羟基－3-磺酸钠丙酯，探索了反应温度、催化剂、反应时间、反应物物质的量比等因素对合成的影响。

Expanding pinacol reductive coupling reaction into asymmetric one with both diastereoselectivity and enantioselectivity may lead to its application in synthesising medicaments and biologic active compounds with structure of vicinal diol. Asymmetric pinacol coupling reaction is also the most compact and effecient method in synthesizing chiral ligands or chiral auxiliary with C〓 symmetry.

将这一反应发展成为既有高度的非对映选择性，又有高度对映选择性的不对称偶联反应在合成许多含有手性邻二醇结构的药物或生物活性物质将有更重要的应用，同时不对称Piancol偶联反应也是合成C〓对称性的邻二醇多用途手性配体或手性助剂的最为简捷有效的方法。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！