烯酮

The electronic structure and spectroscopic properties of some dicyano group verbenone deriatives were investigated by means of quantum chemistry semiempirical AM1 and INDO methods.

利用量子化学半经验AM1及INDO/ SCI方法研究了双氰基马鞭草烯酮衍生物的电子结构和光谱性质。

In addition,ZEA still has the immunity toxicity and latent cancer-causing, to the threat of the animal and mankind's health very huge.

因此玉米赤霉烯酮对雄性动物生殖细胞毒性作用的研究对提高动物的繁殖性能、改善畜产品的品质有着十分重要的意义。

Based on our early work, we will discuss the coupling the reaction of α-cyano ketenedithioacetals with Baylis-Hillman adducts.

基于以上的研究，本文着重讨论了α-氰基二硫缩烯酮与Baylis-Hillman加成产物的偶联反应。

The crystal structure of the deoxygenating reaction product 1,1-dichlorotetraphenylcyclopentadienone of phenyl mercury with tetraphenylcyclopentadienone is reported.

本文报道了二氯卡宾(由一溴二氯苯基甲基汞产生)与四苯基环戊二烯酮脱氧反应产物的晶体与分子结构，并就其结构特征讨论了反应机理和产物的关系。

Objective To investigate the effects of mifepristone and gesterinone on expression of matrix metalloproteinase-2(MMP-2) cultured human eutopic and ectopic endometria.

目的 探讨子宫内膜异位症的异位与在位内膜基质金属蛋白酶-2(MMP-2)的含量及米非司酮、孕三烯酮对其的影响。

If the sweaty guy standing in line next to you smells like vanilla-or urine-you may have whiffed a steroid in his body odor called androstenone.

假如有位满身是汗的男生排队排在妳的旁边，身上闻起来像香草味---或尿臭味---妳也许正在慢慢的闻到他身上的类固醇又称雄烯酮。

The relative cross-reactivity of PA with AFB-1,ZON,T-2,FB were less than 0.01%and with an affinity constant for PA of about 1.54×10~8 liters per mol.It offered a foundation for developing immunoassay method for PA.

单克隆抗体与黄曲霉毒素B1、玉米赤霉烯酮、T-2毒素和伏马毒素B1均无交叉反应率，单抗的亲和常数为1.54x10~8 L/mol，为进一步建立青霉酸的免疫学快速检测方法提供了基础。3。

Quinocetone and Cyadox, which were new growth promoters ofthe quinoxalines family, had the characteristic of low toxicity, less side effect and obviousgrowth promotion in food-producing animals.

喹烯酮和喹赛多是新一代喹喔啉类抗菌促生长剂，毒性低，毒副作用小，对食品动物具有良好的促生长效果，具有广阔的应用前景。

In order to surmount the problem of slow reaction rate of the Baylis-Hillman reaction, we employed N-tosylated imines as the electronphile.

因为醛和环状烯酮的反应很难进行，我们便用活性更高的亲电试剂磺酰亚胺代替醛进行Baylis-Hillman反应，取得了很好的结果，反应速度得到了很大的提高。

According to the results of the examination, the stronger the electron-withdrawing protective group of imines, the better the cis-selectivity of the reaction, 68% yield, trans:cis is 99:1 diastereoselectivity could be leaded by Ts-imines (4-methyl-N-methylene-benzenesulfonaides) with a substituent [2,4-(CH3O)2C6H3], Substrate scope investigation revealed that a wide variety of ketenes and imines could react smoothly to afford corresponding,β-lactams.

实验结果表明，亚胺的保护基团吸电子能力越强，越有利于顺式产物的生成。对甲苯磺酰基保护的取代基为2，4-二甲氧苯基的亚胺参与的该反应可得到68%的产率，反式：顺式=99：1的非对映选择性。底物拓展过程中发现Staudinger反应适用于多种不同的亚胺与烯酮。

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。