一乙胺

A base-catalyzed novel olefination methodology based on elimination of p-toluenesulfonamide:Treatment of diethyl cyanomethylphosphonate with catalytic amount of basegave the corresponding phosphoryl-stabilized carbanion, which added to the carbon-nitrogen double bond of N-tosyl imines.

新形成的氮负离子进一步攫取另一分子膦酸酯的活泼亚甲基氢形成加成产物同时再生出膦酰基稳定的碳负离子。加成产物消除对甲苯磺酰胺，高度立体选择性地得到-α-氰基-β-芳基-乙烯基膦酸二乙酯。

Also, the "MeiTai" pumpkin showed a little bit higher tolerance to pendimethalin than "NO1 pumpkin" cultivar.3 The differences in Inhibition rate on different cucurbits between two herbicidesResults showed that inhibition increased with rate of application of herbicides increase. There was little injury of pendimethalin at 5 ppm on "white beauty "muskmelon,"green farmNo9" watermelon,"Jinghu No2"squash and "MeiTai" pumpkin.

不同除草剂对不同瓜类抑制率的差异在除草剂用量5ppm～10ppm之间，随着浓度的增加，抑制有明显增强的趋势。5ppm施田补对&白美人&甜瓜、&绿农九号&西瓜、&京葫二号&西葫芦及&美泰赤粟&南瓜安全。10ppm对&绿农九号&也很安全，对&京葫二号&相对安全，对其它瓜类安全性不高。5ppm及10ppm的乙草胺对&绿农九号&西瓜安全，对&南瓜一号&相对安全。

Another possibility is acetazolamide, one of the first diuretics discovered.

另一中可行性药物是乙酰唑胺，这是一种利尿的发现。

In present study, the effects of piracetam on the content of monoamines transmitter and their metabolites induced by restraint water immersion in the rat brain employing ion pair revesed phase high performance liquid chromatography with electrochemical detection were investigated.

吡拉西坦( piracetam ，脑复康)，化学名：乙酰胺吡咯酮，是首先由比利时UCB研究所 1 963年合成的一种促智药，研究表明它有激活、保护和修复神经细胞作用[1～ 3] 。

X 6.36(3)? is formed.Liquid-liquid extraction experiments, between twelve heterocyclic thioalkoxycalix[4]arene on the lower rim, fifteen heterocyclic thioacetamidecalix[4]arene on the upper rim and Na~+、K~+、Cs~+、Mg~(2+)、Cu~(2+)、Co~(2+)、Cd~(2+)、Ni~(2+)、Pb~(2+)、Hg~(2+) and Ag~+ picrates, have been carried out and their results are compared.

分别将十二个下沿含有杂环硫烷氧基杯芳烃衍生物和十五个上沿含有杂环硫乙酰胺基的杯芳烃衍生物与Na~+、K~+、Cs~+、Mg~(2+)、Cu~(2+)、Co~(2+)、Cd~(2+)、Ni~(2+)、Pb~(2+)、Hg~(2+)和Ag~+的十一种苦味酸盐进行了离子萃取实验，并对两类衍生物与不用金属离子的萃取能力进行了分析和比较。

Under mild hydrothermal synthesis conditions, we first successfully prepared threeindium phosphites with different organic amine molecules as template agents.

在水热条件下，以乙二胺为模板首次合成出1个具有一维正六边形孔道结构的亚磷酸镉微孔化合物。

Objection:To investigate the significance of contrast-enhanced ultrasound in quantitative diagnosis of liver cirrhosis. Methods:Rabbits models with liver cirrhosis of different stages were successfully made by feeding them with thioacetamide solution. And a self-comparison method was adopted in the trial. The hepatic artery to vein transit time was taken as the parameter for evaluation.

30只实验兔以1.20 g／L的硫代乙酰胺水溶液作为惟一饮用水的方法建立不同阶段的肝硬化模型，应用Bracco公司生产的声诺维作为造影剂，并用自身前后对照的方法，在肝硬化模型建立前后测量肝静脉内造影剂出现的时间及肝动脉内造影剂出现的时间，两者相减得到肝动静脉渡越时间，比较肝硬化前后数值间的差异。

The invention adopts halogen acetylized crosslinked polystyrene resin and hydroxybenzyl alcohol as the raw material, and the solid phase synthesis carrier with hydroxymethyl as the active group is synthesized through the joint catalysis of N, N-dimethyl formamide used as the reaction solvent, inorganic base and phase-transfer catalyst.

本发明采用卤乙酰化交联聚苯乙烯树脂和对羟基苯甲醇为原料，在以N，N-二甲基甲酰胺为反应溶剂、无机碱及相转移催化剂的共同催化下合成了一种以羟甲基为活性基团的固相合成载体。

AIM To observe the formation and effects of nitric oxide and free radicals on acute liver injury induced by thioacetamide.

目的 用硫代乙酰胺诱发大鼠急性肝损伤，观察肝损伤过程中一氧化氮与自由基的变化。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。