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双乙酰是影响啤酒风味的重要物质。Diacetyl is an important matter affecting the flavor of beer.

啤酒中双乙酰含量的变化与许多因素有关。The change of diacetyl content in beer is related to many factors.

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双乙酰是啤酒品质管理的重要指标之一。Diacetyl is one of the important indices in beer quality management.

双乙酰也是影响啤酒风味的重要原因之一。Diacetyl is also an important effect substance on the flavour of beer.

双乙酰在啤酒中含量高，阈值低，对啤酒风味影响很大。Higher content of diacetyl in beer has great effects on beer flavors due to its low threshold.

用工业级荧光素，经过酰化反应合成双乙酰荧光素。The diacetyl fluorescein was synthesized through the acylation reaction with industry fluorescein.

爆米花的奶油香味来源于一种名为二乙酰的化学物质，这种物质可以致癌。The butter flavor in microwave popcorn comes from a chemical called diacetyl , which can cause cancer.

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对EBC法、气相色谱法和化学发光法测定啤酒中的双乙酰含量进行了优化和比较。The hydrosulfite in beer would cause deviation of the determination of diacetyl content in beer by EBC method.

该文介绍了一种快捷、可靠的测定啤酒中双乙酰含量的分析法。A rapid and reliable analytical method for the detection of diacetyl and other vicinal Diketones in beer was described.

本文简要综述了啤酒生产中双乙酰的形成机制和代谢调控研究进展。In thin paper, the progress of study on the formation mechanism and metabolic control of diacetyl was reviewed briefly.

本文简要综述了啤酒生产中双乙酰的形成机制和代谢调控研究进展。In this paper, the progress of study on the formation mechanism and metabolic control of diacetyl was reviewed briefly.

啤酒酿造过程中经常出现一种现象，即清酒双乙酰值较低而成品啤酒中双乙酰成倍增长。It is common that during the production of beer that diacetyl value is low in clear wine but timely increases in produced wine.

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双乙酰，乙偶姻含量有大幅度增加，其含量比对照酒高一倍。The contents of diacetyl and acetoin in wine increased significantly and the average was twice as much as that in controlled wine.

乙酰乳酸脱羧酶的应用提高了啤酒的发酵和成熟速度，因为它可以抑制发酵过程中双乙酰的形成。Application of α-acetolactate decarboxylase can be accelerated speed of Fermentation and maturation, because it shunts diacetyl formation.

本文对利用肌酸比色法测定双乙酰过程中的若干影响因素进行了研究，进一步完善了此测定方法。The paper makes a study on the effect of some factors in determining diacetyl with Voges-proskavr test, and makes the method more perfect.

探讨了不同的何首乌叶添加量对小曲中的微生物种类和数量、糖化力、液化力及发酵力的影响。The fermenting force, capacity of return diacetyl , flocculation and sugar fermentation and killing temperature of nine strain were screened.

通过发酵试验发现这些菌株的代谢产物双乙酰和高级醇的含量，双乙酰的还原速度存在较大的差异。The fermentation research showed that these strains had different reducing speed of diacetyl and the contents of diacetyl and higher alcohols.

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本文介绍了双乙酰的形成途径和影响因素，以及如何控制啤酒中双乙酰的含量。In this paper , we introduced the way of diacetyl formation , the affective factors and methods of controlling the formation of diacetyl in beer.

研究各种操作条件对EBC分析法测定啤酒中双乙酰的影响，得到了较有价值的结果。We study the affection for the EBC method determination of diacetyl in beer of all kinds of coefficiant of variation and obtain valuable results.

二乙酰基二茂铁的制备过程与乙酰基二茂铁相似，只是前者的反应温度更高。The process or way of synthesis of diacetyl ferrocene is very like that of acetyl ferrocene. But to the first compound, the reaction temperature must be higher than that to the second.