查询词典 isovalerate

The results show that there were no significant differences among the four forage rations in rumen pH, the concentrations of total volatile fatty acids, acetate, propionate, the ratios of acetate to propionate, butyrate, isobutyrate and valerate（P﹥0.05）. Only in 11:30, the concentrations of isovalerate caused by ration A and B were significantly higher than the other two rations(P﹤0.05).The milk yield caused by the ration C was significantly lower than the others (P﹤0.05). However, there were also no significantly differences among these four rations in the DM, fat, sugar, protein and scc of the milk. The milk fat and sugar of ration B and C were higher than ration A and D in number as well.

试验结果显示：各粗料组合日粮对各个时间点的瘤胃发酵指标：pH、TVFA、乙酸、丙酸、乙酸/丙酸、丁酸、异丁酸、戊酸浓度均无显著差异（P﹥0.05），只在11：30时，日粮A、B的异戊酸浓度显著低于日粮C、D (P﹤0.05)；日粮C的产奶量显著低于其它三个日粮，而在乳干物质、乳脂、乳糖、乳蛋白、体细胞数上，各日粮均无显著差异，从数值上看，日粮B、C的乳脂和乳糖高于A、D。

The progresses in the synthesis study of isoamyl isovalerate at home and abroad were reviewed.

综述了国内外对异戊酸异戊酯的合成研究的进展情况。

The progresses in the synthesis study of isoamyl isovalerate at home and abroad were reviewed.

考察了催化剂的活化温度和活化时间以及酯化反应条件对酯收率的影响。

The effects of activation temperature and activation time for the catalyst and the esterification conditions on the yield of isoamyl isovalerate were investigated.

用纳米级HZSM-5分子筛作催化剂合成了异戊酸异戊酯，考察了催化剂的活化温度和活化时间以及酯化反应条件对酯收率的影响。

When using mixed diet as the substrate, sodium fumarate addition increased NDF digestibility, xylanase activity, total VFA concentration and propionate proportion, decreased acetate, isobutyrate, and isovalerate proportions, and acetate to propionate ratio.

当使用混合日粮为受质时，添加延胡索酸钠，提高了中洗纤维消失率、木聚糖酵素活性、总挥发性脂肪酸浓度和丙酸的百分比，降低了乙酸、异丁酸与异戊酸的百分比和乙酸对丙酸的比例。

The simple method of one step synthesis of isoamyl isovalerate from isovaleraldehyde under aluminum isoamyloxide catalyst and ZnCl\-2 co catalyst was studied.

在自制的异戊醇铝催化剂和无水氯化锌助催化剂作用下，以异戊醛为原料一步合成出异戊酸异戊酯。

Using potassium bisulfate as the heterogeneous catalyst,isovaleric acid and n-butanol reacted to form flavor butyl isovalerate.

以异戊酸和正丁醇为原料，采用不溶于反应物系的硫酸氢钾为非均相催化剂合成了食用香料异戊酸丁酯。

Isoamyl isovalerate was synthesized through esterification reaction by using isovaleric acid and isoamyl alcohol as raw materials and nano-H4SiW12O40/SiO2 as catalyst, the influencing factors in the reaction were studied, and the results showed that the esterification rate could reach 98.6 % under the conditions of the ratio of alcohol-acid 1.4∶1, the use level of catalyst 5 %, and the reaction time 1.5 h.

以纳米复合钨硅杂多酸为催化剂，异戊酸和异戊醇为原料，通过酯化反应合成苹果油，对酯化反应的影响因素进行了研究，结果表明，在醇酸物质的量比为1.4∶1，催化剂用量5%，反应时间1.5h的条件下，酯化率可达98.6%。

With mixed diet as a substrate, supplying sodium fumarate increased neutral detergent fiber digestion, CMCase activity, and propionate proportion, but decreased acetate, butyrate, and isovalerate proportions, and acetate to propionate ratio.

当使用混合日粮（60%百慕达乾草+40%精料）为受质时，补充延胡索酸钠，提高了中洗纤维消失率、羧甲基纤维素分解酵素活性和丙酸的百分比，降低了乙酸、丁酸和异戊酸的百分比和乙酸对丙酸的比例。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。