乳链球菌丁二酮亚种能将乳中的柠檬酸盐转化成丁二酮。
The organism Lactococcus lactis subsp, diacetilactis converts milk citrate to diacetyl.
氨基酸分析表明，酶的失活是因为丁二酮修饰了精氨酸残基。
Amino acid analysis showed that the inactivation of the enzyme was due to the modification of the arginyl residue by butanedione( Table3).
乳酸菌的主要风味代谢物质包括丁二酮，乙醛以及各种氨基酸。
The major flavor substances Lactic acid bacteria produced include the buttermilk aroma butanedione, the yoghurt flavor acetaldehyde and the amino acid.
丁二酮作为饲料香味剂，可增加动物食欲及采食量，提高生产效率。
Butanedione as feed scenting agent may improve appetite and capacity for eating of animal, and increase efficiency of production.
目的：筛选出稳定的高产丁二酮突变菌株，并对其进行发酵动力学分析。
Objective: To screen a stable, high diacetyl-producing strain and analyse its fermentation kinetics.
乳链球菌丁二酮亚种能将乳中的柠檬酸盐转化成丁二酮，该物质会使终产品具有一种特殊的奶油香味。
The organism Lactococcus lactis subsp, diacetilactis converts milk citrate to diacetyl, which gives a special buttery flavor to the finished product.
以2，3- 丁二酮和乙二胺为原料，采用二步法合成了2，3-二甲基吡嗪．研究了催化剂体系对脱氢反应的影响，得到了较好的结果．。
Dimethylpyrazine was synthesized by the two_steps method of 2,3-butylanedione and ethylenediamine, the dehydrogen catalytic system was studied and better results were obtained.
为研究硫醇烯光固化组成物的反应机理，选用安息香双甲醚、安息香乙醚、安息香正丁醚、二苯甲酮和噻吨酮为光敏剂，用红外光谱法研究了硫醇烯的光化学反应动力学。
The kinetics of thiol-ene reaction is studied by Fourier Transform Infrared when benzoin dimethyl ether, benzoin ethyl ether, benzoin butyl ether, benzophenone and ITX were used as photosensitizer.
产品成份：去离子水、甘油、丁二醇、红花提取液、尿囊素、苯氧乙醇、透明质酸、PEG - 40氢化蓖麻油、吡咯烷酮羧酸钠、EDTA -二钠、香料。
Ingredients: Deionized Water, Glycerin, Butanediol, Safflower Extract, Allantoin, Phenoxyethanol, ha, PEG-40 Hydrogenated Castor Oil, Pyrrolidone Carbozylic Acid, EDTA-Disodium Salt, Essence.
产品成份：去离子水、甘油、丁二醇、红花提取液、尿囊素、苯氧乙醇、透明质酸、PEG - 40氢化蓖麻油、吡咯烷酮羧酸钠、EDTA -二钠、香料。
Ingredients: Deionized Water, Glycerin, Butanediol, Safflower Extract, Allantoin, Phenoxyethanol, ha, PEG-40 Hydrogenated Castor Oil, Pyrrolidone Carbozylic Acid, EDTA-Disodium Salt, Essence.
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