烯酮

OBJECTIVE: To observe the influence of diethylstilbestrol combined with EPF on metabolic biochemical indexes and bone histomorphometry of lumbar and femur in ovariectomized rats.

目的：观察己烯雌酚与淫羊藿总黄酮联合用药对去卵巢大鼠腰椎和股骨的代谢生化指标和骨组织形态计量学的影响。

The results show that the new β-diketone compound exists in the chloroform in chloroform solvent.

这种β-二酮化合物在氯仿溶液中主要以烯醇形式存在。

The catalytic activity of this new resin catalyst in the isobutene oligomerization was measured in detail, it exhibited good catalytic activity and excellent isobutene dimerization selectivity.

在异丁烯的低聚反应中，对这种新型树脂催化剂的催化活性进行了细致的研究，磺化聚醚碸酮树脂催化剂在反应中表现出了很好的催化活性和优良的二聚选择性。

Furthermore, the important fragment which is composed of pentenyl cinnamic acid and D-Tyrosine, and the ester which is composed of L-N-methylated phenyl amino acid and diketopiprazine was synthesized with considerable yield The conjugation of the new DOPA analogue into the peptide in the total synthesis of Pepticinnamin E was investigatited

另外，本文作者还进一步合成了高收率的戊烯基肉桂酸衍生物与D-酪氨酸的缩合片段及L-N-甲基苯丙氨酸与哌嗪二酮的酯两个重要的结构组成部分；对新多巴衍生物片段嵌入肽链中的工作亦进行了有益的尝试。

It may result from the coupling of acarbonyl group in one molecule with the double bond in another molecule.

它是由一分子环丁烯二酮的羰基碳与另一分子的双键β-碳发生还原偶联的结果。

At the meantime, we synthesized the chiral spiroketal enol ether steroselectively and their absolute configuration were determined.

我们还对螺环缩酮烯醇醚类化合物的立体选择性形成规律进行了探索，并取得了积极的结果。

In another direction, the radical cyclization of thioimide with acylsilane produced simple cyclization product in low yield without expected enol silyl ether compound.

对於硫醯亚胺与矽基酮的自由基反应，则是得到低产率的简单环化产物，而不是预期的烯醇矽醚化合物。

The clarification, coordination modes of keto and enol form and of mono and multidentate, properties of biological and pharmacoligical activities and nonlinear optical of acylhydrazone compounds are reviewed.

综述酰腙化合物的种类，酮式、烯醇式、单齿和多齿配位形式，生物和药物活性及非线性光学性质

Additionally, the quantum chemical study on the isomeriaation mechanism of the enol ester of 2-acyl-l,3-cyclohexanedione was performed, which was discovered by Yang when he synthesized the derivate of 2-acyl-l,3-cyclohexanedione.

第三部分工作是对杨定亚在合成2-酰基-1，3-环己二酮类化合物的衍生物时意外发现的烯酯异构化反应机理进行了研究。

Over the years, Masson's food additive brand -"Silver Valley" has been at the forefront of China Food Additive Industry forefront of the reform In 1984, the first in the domestic market development and production of soybean products for human consumption antifoamer; in 1988, took the lead in the domestic market development and production of edible spices - cyclopentyl enol methyl ketone; in 1989, took the lead in the domestic market to develop speed-fat cake oil; In 1992, the first in the domestic market development and production of ice cream and beverage emulsion stabilizer; in 1999, introduced the internationally advanced level molecular distillation Monoglyceride domestic exclusive CPP realize industrial production

多年来，美晨公司的食品添加剂品牌--"银谷"一直站在中国食品添加剂工业改革的潮头 1984年，率先在国内市场开发生产豆制品食用消泡剂；1988年，率先在国内市场开发生产食用香料--甲基环戊烯醇酮；1989年，率先在国内市场开发速发蛋糕油；1992年，率先在国内市场开发生产冰淇淋和饮料乳化稳定剂；1999年，推出具有国际先进水平的分子蒸馏单甘酯，在国内独家实现CPP工业化生产

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。