查询词典 acetic

Isoamyl acetate was synthesized with acetic acid and isopentyl alcohol by using Ca(p-CH3C6H4SO3) 2 as catalyst.

以乙酸和异戊醇为原料、对甲苯磺酸钙为酯化催化剂合成乙酸异戊酯，研究影响酯化率的因素。

The effects of various reaction parameters including the dosage of the catalyst, the molar ratio of acetic acid to isoamyl alcohol and the reaction temperature are investigated.

在相同反应条件下，它催化异戊醇的酯化率明显高于以α-MnO_2纳米棒、γ-MnO纳米棒和Mn_3O_4纳米粒子作为催化剂时的酯化率。

Thirdly, on the basis of the optimal reaction conditions of synthesis of borneolacetate, using borneol 、 isoborneol, acetic acid, propionate、 butyrate and isobutyric acid as the starting material and nanometer solid superacid (S_2O_8)~(2-)/ZrO_2 or (SO_4)~(2-)/ZrO_2-La_2O_3 as the catalyst ,a series of compounds ( borneol ester and isoborneol ester ) which had six new compounds were prepared.

以合成乙酸冰片酯的最佳反应条件为基准，采用纳米固体超强酸S_2O_8~(2-)/ZrO_2或SO_4~(2-)/ZrO_2-La_2O_3为催化剂，以冰片、异冰片、乙酸、丙酸、丁酸、异丁酸为原料，合成了系列正、异冰片酯(其中6个末见文献报道)。

The catalytic activity was affected by prepared condition through esterification reaction of acetic acid and isobutyl alcohol.

通过沉淀-浸渍法制备一系列S2O82-/ZrO2-SiO2固体超强酸催化剂，用乙酸和异丁醇的酯化反应研究了制备条件对催化剂活性的影响。

Isobutyl acetate was synthesized from isobutyl alcohol and acetic acid with silicotungstic heteropolyacid as catalyst.

字数：6943 页数：24）摘要：以硅钨杂多酸为催化剂，以异丁醇和乙酸为原料合成了乙酸异丁酯。

For different mixed ferment time, Sensory assessing was not different obviously;pH value,DM,CP,NDF,ADF content were all katabatic or decreasing with extending of mixed silage time; NH3-N/tN%and lactic acid ,acetic acid, propionc acid and butyric acid concentrations were increased gradually,butproportion of lactic acid was the most in total acids.

2不同发酵时间的感官评定结果无明显差别；pH值、DM、CP、NDF和ADF随发酵时间延长均逐渐降低或减少；NH3-N/tN%、乳酸、乙酸、丙酸和丁酸均逐渐增加，但以乳酸占总酸比例最大。

Belluomo rises from the bed of his wife's lover's wife, the kerchiefed housewife is astir, a saucer of acetic acid in her hand.

漂亮男人从他妻子之姘夫的老婆那张床上爬了起来，包着头巾的主妇手持一碟醋酸，忙来忙去。

Belluomo rises from the bed of his wife 's lover's wife , the kerchiefed house wife is astir, a saucer of acetic acid in her hands

漂亮男人从他妻子之姘夫的老婆那张床上爬了起来，包着头巾的主妇手持一碟醋酸，忙来忙去。

Belluomo rises from the bed of his wife's lover's wife, the kerchiefed housewife is astir, a saucer of acetic acid in her hands

漂亮男人从他妻子之姘夫的老婆那张床上爬了起来，包着头巾的主妇手持一碟醋酸，忙来忙去。

In 1903, D. Vorlander and co-workers found that treatment of dibenzylideneacetone with concentrated sulfuric acid and acetic anhydride followed by hydrolysis by sodium hydroxide yielded a cyclic ketol, the structure of which was unknown at the time.

1903年，D。 Vorlander和合作者发现，二苄基丙酮与浓硫酸及醋酸酐经过氢氧化钠水解后产生了当时还不知结构的环状酮醇。

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。