常見例句The article briefly introduces the production of biacetyl and the relations of fermentation technology and biacetyl. 簡述了啤酒中雙乙酰的形成機(jī)制及發(fā)酵工藝與雙乙酰的關(guān)系,提出了在啤酒實(shí)際生產(chǎn)中雙乙酰含量的控制方法。The content of biacetyl is an important quality indexes to measure the matarity of beer. 雙乙酰含量是衡量啤酒成熟度的一項(xiàng)重要理化指標(biāo)。The applications of SKALAR brand interval flow analyser in the analysis of fermentation liquid and content of product biacetyl were introduced. 介紹利用SKALAR間隔流動分析儀對發(fā)酵液、成品雙乙酰含量的分析,并對SKALAR與GB法的分析結(jié)果進(jìn)行比較、分析。METHODS Linezolid was prepared by the steps of substitution,reduction,acylation and condensation with biacetyl compond from the starting material 3,4-difluoronotrobenzene. 方法以3,4-二氟硝基苯為原料,經(jīng)取代、還原、酰化、再與側(cè)鏈雙乙?;衔锟s合得到目標(biāo)化合物。METHODS Linezolid was prepared by the steps of substitution, reduction, acylation and condensation with biacetyl compond from the starting material 3,4-difluoronotrobenzene. 方法以3,4-二氟硝基苯為原料,經(jīng)取代、還原、?;?、再與側(cè)鏈雙乙?;衔锟s合得到目標(biāo)化合物。Furthermore, we think the catalytic reaction in gas-solid phase is the superior developing trend and in this reaction,2,3-butylene-glycol should be replaced by cheap biacetyl. 本文認(rèn)為,2,3-二甲基吡嗪的合成發(fā)展趨勢應(yīng)采用氣固相催化反應(yīng)的方法,建議以價廉的丁二酮取代以往氣相法中以2,3-丁二醇為原料的路線。 返回 biacetyl