碱性

The electrochemical oxidation of ethylene glycol on this catalyst in alkaline solutions was study for the first time.

首次用循环伏安和计时电位法研究了碱性溶液中乙二醇在该催化剂上的电化学氧化行为。

Cephalotaxine ester of 2-oxo-6-methylheptanoic acid was treated with lithium diisopropylamide and Me O-(1-methoxyisopropyl)glycolate to give a mixture of homoisoharringtonine and its stereoisomers with 56% yield. The four stereoisomers separated by TLC showed identical mass spectra and almost superimposed IR but with different 1H NMR spectra. The configuration of the 2'-C and 3'-C of the four isomers were postulated based upon their 1H NMR spectra as compared with the 1H NMR spectra of isoharringtonine and its stereoisomers.

2-氧代-6-甲基庚酰基三尖杉碱(3)与0-(1-甲氧基异丙基)羟基乙酸甲酯(4)在强碱性试剂二异丙胺锂存在下，起亲核加成反应，反应中间体5在室温用酸性丙酮水解，得到一种新的三尖杉酯类生物碱一一高异三尖杉酯碱(6c)及其立体异构体(6a、6b、6d)的混合物，产率56%、通过制备薄层层析分得这四个立体异构体，它们的1H NMR和异三尖杉酯碱及其立体异构体的1H NMR类似，推定了它们的绝对构型。

Semens were collected at 1, 4, 8, 12, 16, 24, 36 and 44 weeks after gossypol treatment and 10 weeks after stopping treatment.

于服药后1、4、8、12、16、24、36、44周及停药后10周采集精液，对照组于相同时相采取精液，分析精子碱性核蛋白的变化。

Blue Grama grass is native to the Great Plains where the temperature ranges from hot to cold and the soil is primarily of alkaline content and rainfall can be practically non-existent in some areas.

蓝色格兰马草是大平原上的一个自然草种。在大平原上，炎热和寒冷的气候都有。最初的土壤含有碱性成分，在有些区域几乎没有降水。

In view of some disputes that have cropped up in the naming of A_type granite in China, this paper suggests that the term alkaline granitoids should be used to replace the name A_type granite.

针对目前国内A型花岗岩命名中出现的一些问题，建议以"碱性花岗岩类"一词代替A型花岗岩。

Granitic rocks mainly consist of quartz, plagioclase and alkaline feldspar and hence have lower densities.

花岗质岩石主要由石英、斜长石和碱性长石组成，并因此具有较低的密度。

Modern research has shown that crocodile dung actually created optimum conditions for sperm because of its alkalinity, but the sheer grossness of the practice might have worked if only to completely ruin the mood.

但 现代研究表明，鳄鱼粪呈碱性，实际上却为精液创造了最佳的环境，但，如果个体心情不佳，行房时粗俗野蛮，或许会起到避孕的作用。

Rhyolites are a group of extrusive igneous rocks with phenocrysts (visible crystals that grew out of the molten lava) of quartz and alkali feldspar in a glassy to cryptocrystalline groundmass.

流纹岩是一组受挤压火成岩矿，包含了在玻璃基的隐晶质中的石英与碱性长石的斑晶（生在于熔岩外的可见石英晶体）。

Effects of dietary guaiacol on contents of P and Zn in shell were not in shell was elevated by dietary guaiacol.

SMP中酸性/碱性氨基酸的比例随饲料愈创木酚添加量的升高而升高。

In order to obtain 3-methoxy-4-hydroxymandelic acid with high quality and high yield, guaiacol was condensed with glyoxylic acid in an alkaline aqueous solution using solid acid as catalyst. The reaction temperature and reaction time was 15℃ and 18 hours respectively.

为了得到高质量和高收率的3-甲氧基－4-羟基苯乙醇酸，使愈创木酚和乙醛酸在碱性水溶液中在固体酸催化剂存在下进行缩合反应，反应温度15℃，反应时间18h。

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！