乙酸

TsOH-SBA-15 had higher catalytic activity than sulfuric acid with the same number of acid sites.

结果表明，该催化剂对冰乙酸和正丁醇的酯化反应具有较高的催化活性。

Objective To investigate the effect of thioglycolic acid on oocyte maturation process in vitro in mice and Xenopus.

目的 探索巯基乙酸对非洲蟾蜍和小鼠卵母细胞体外成熟的影响。

According to previous research work, the sulfoacetic acid disodium salt was synthesized by a nucleophilic substitution reaction in this paper.

本论文在总结前人研究工作的基础上，采用亲核取代反应合成了磺酸乙酸钠。

The level of ADAR gene expression was expressed as ratio expression rate of ADAR gene /β-actin acc...

ADAR3在正常人脑胶质细胞及苯乙酸处理前后的胶质瘤细胞中，均未见表达。结论ADAR2 mRNA水平高表达，可能与高恶性度胶质瘤的发生有关。

Aims We investigated aerenchyma formation in stems of riparian plants Arundinella anomala and Salix variegate as affected by addition of ethylene and a-naphthalene acetic acid under non-flooded conditions in order to ascertain whether phytohormone ethylene and auxin are direct stimuli for aerenchyma formation in flooded plants.

为了探究乙烯和α-萘乙酸是否是水淹环境条件下植物体内通气组织形成的直接原因，对三峡库区岸生植物野古草和秋华柳在无水淹环境条件下施加乙烯利和α-NAA后茎中通气组织的形成情况进行了研究。

We found that when acetone was used as solvent, in the presence of TFA, cis-4-pyrrodin-1-yl-L-proline could catalyze the direct asymmetric aldol reaction between acetone and 4-nitrobenzaldehyde with 84% ee.

研究发现，该催化剂以丙酮为溶剂时，加入催化剂等当量的三氟乙酸可以较好的催化丙酮与对硝基苯甲醛之间的直接不对称Aldol反应，得到84%的ee值。

The carboxymethyl soybean polysaccharides had been synthesized and the mechanical strength, solubility, bacteriostasis of algin, algin carboxymethyl soybean polysaccharides alloy membrane had been studied.

用氯乙酸作为羧甲基化试剂合成了羧甲基大豆多糖；测定了羧甲基大豆多糖、褐藻胶、褐藻胶-羧甲基大豆多糖合金膜的机械强度、溶解性；并对其肠溶性、抑菌性也作了探讨。

Modern industrial methods of synthesis of acetic acid ethyl ester oxidation and lower alkane oxidation France.

现代工业上合成乙酸的方法有乙醋氧化法和低级烷烃氧化法。

In this study, we carried out the allylation of anilines with allylic acetates in PEG-H2O system in the presence of palladium as catalyst. N-allylation of anilines was achieved.

在本研究中，我们完成利用钯催化剂，在水及聚乙二醇系统中，使苯胺类和乙酸烯丙酯类进行烯丙基化反应，并探讨各苯胺类反应物之结果。

Chiral N,P ligand 5 was examined for the asymmetric allylic alkylation of 1,3-diphenyl-2-propenyl acetate with up to 89% yield and up to 81.6% ee.

化合物5用于钯催化的1，3-二苯基-2-烯丙基乙酸酯的不对称烯丙基烷基化反应，产率为89%，对映体过量最高为81.6% ee。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。