查询词典 esters

Fatty acid ethyl esters was synthesized by ethanolysis of safflower seed oil.

通过红花籽油乙醇解反应制备脂肪酸乙酯。

II. Oxidation of α,β-Unsaturated Ketones with Hypervalent Iodine Reagent Literatures reported that lead acetate-borontrifluoride etherate (LTA/BF3-Et2O) can transform α,β-unsaturated ketone to β,γ-unsaturated carboxylic acid ester through an one-step oxidative rearrangement reaction. Our research along this line indicated that hypervalent iodine reagents can also affect the same reaction.

II。 高价碘对α，β-不饱和酮之氧化研究先前已有文献指出用leadacetate-borontrifluoride etherate (LTA/BF3-Et2O)做氧化剂，可以经由一步的重组氧化反应把α，β-不饱和酮(α，β-unsaturated ketones)氧化成β，γ-不饱和碳酸酯(β，γ-unsaturated carboxylic acid esters)衍生物。

The fragrance substances inpumpkins were primary esters, aldehydes, terpenoids and volatile acid et al. The most of flavor substances were easy evaporable.

构成南瓜香气的香味物质成分主要是酯类、醛类、萜类、醇类、酮类及挥发酸等，绝大部分风味物质含量低，又易挥发。

FLUORENE CARBOXYLIC ACID ESTERS, METHODS FOR THE PRODUCTION THEREOF, AND

芴羧酸酯，其制备方法及其制备药物的用途

Meanwhile, the related fulvene esters are also derived from the reaction.

本文从1，6-取代富烯出发，成功地合成了五，六杂双环化合物。

The resistance to oxidation of synthetical ferulaic acid glycolipide was investigated. The result was shown, apple was dipped in 0.62% ferulaic acid glycolipide, the most inhibitor effectiveness of glucose ferulaic esters and xylose ferulaic ester was shown respectively to be 36.92% after four days and 19.47% after eight days, the fastigium of release ethane was postponed respectively to be six days and four days.

本文测定了合成阿魏酸糖脂的抗氧化性，结果表明用0.62％的阿魏酸糖脂浸泡的苹果，阿魏酸葡糖酯抑制效应在处理后4天最明显，抑制率 36.92%，阿魏酸木糖酯抑制效应在处理后8天最明显，抑制率为 19.47%对于果实的内源乙烯释放，经阿魏酸葡糖酯和阿魏酸木糖酯处理的苹果分别推迟乙烯释放高峰期6天和4天。

In order to find the causations of precipitate in Soybean-flavor liquor, fat was soaked in the liquor in pottery jars (volume 20 kg), pottery pots (volume 400 kg) and aluminous pots (volume 50m3) respectively with all the containers managed by active carbon and guhr for the tests and the samples were obtained from them every five days to analyze and determine the changes of higher fatty acid ethyl esters.

为弄清豉香型酒产生沉淀的原因，对小陶坛、大陶缸及铝质大罐盛装斋酒浸泡肥肉进行了试验，每隔5天取样一次，分析测定高级脂肪酸乙酯的变化情况，小陶坛容量20kg，大陶缸容量400kg，大罐容量50m3，并用活性炭和硅藻土进行了斋酒处理试验。

The result showed due to yeast fermentation process there were many new aroma components in jujube wine which were different from the juice: Isoamyl alcohol, Phenylethyl alcohol, Benzyl alcohol and so on; jujube juice hexadecanoic acid and other senior fatty acid composition obviously degradated; Alcohols and esters composition were sharply upward.

反映出发酵过程由于酵母的繁殖代谢产生了很多新成分，如异戊醇，丁酸乙酯，辛酸乙酯等；枣汁中十六酸等高级脂肪酸成分明显降解，苯乙醇，2，3-丁二醇，己二酸(2-甲基)丁酯，己二酸二异丙酯等醇类和酯类成分呈急剧上升的趋势。

In the forth part, in the presence of chiral phosphoric acid, highly enantio-enriched (up to 98% ee)α-aryl glycine derivatives could be synthesized via asymmetric transfer hydrogenation of the α-aryl imino esters using Hantzsch ester as the hydrogen source.

第四部分工作中，利用Hantzsch酯作为氢源，高对映选择性地实现了手性磷酸催化芳基酮酸酯亚胺的不对称仿生氢化反应，以最高98％的对映选择性得到苯甘氨酸衍生物。

Mol/L. 3 A study on the ECL of acridinum esters including 10--acridinium-9-carboxyl-phenyl-ester iodinate and 10-methyl-9-(p-formylphenyl)-acrdiniumfluorosulphonate in neutral solution was carried out. It was found both CACPEI and MFPA give strong ECL in KNO〓 solution when an appropriate voltage was applied on Pt electrode.

本文研究了碘化10-乙羧基吖啶-9-羧酸苯酯和对甲酰基苯基-10-甲基吖啶-9-羧酸酯氟磺酸盐的ECL行为，发现在中性KNO〓介质中，这两种吖啶酯都能在一定的电位下产生很强的ECL信号，考察了各种影响因素，确定了发光的最佳条件，探讨了可能的发光机理。

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。