- 更多网络例句与醛缩作用相关的网络例句 [注：此内容来源于网络，仅供参考]
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The use of such method to determine acetal content in soybean-flavor liquor was helpful for guiding the production and liquor blending.
用该方法时鼓香型白酒产品进行乙缩醛含量检测，对鼓香型白酒生产工艺以及匀兑有重要的指导作用。
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Secondly,a mixture of acetone and methyl formate was added into the methanol solution of sodium methoxide to prepare sodium formyl acetone by Claisen reaction.
以金属钠为原料，甲醇为溶剂，先制成甲醇钠的饱和甲醇溶液，再滴加丙酮和甲酸甲酯进行Claisen酯缩合制得丁酮烯醇钠，最后在强酸作用下与甲醇进行缩醛化反应合成了4，4-二甲氧基-2-丁酮，过程总收率达到73.1%，纯度98.7%。
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Over a solid acid catalyst, the reaction in which methanol and formaldehyde are condensed into mathylal is reversible. This reaction tends to be completion by reactive distillation and the high-purity methylal product can be obtained.
在固体酸催化剂作用下，由甲醇、甲醛缩合生成甲缩醛，该反应为可逆反应，采用催化精馏技术可使反应趋于完全，并得到高纯度甲缩醛产品。
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In this paper, the acetalization of benzylaldehyde and 1,3-propanediol in the presence of vanadium phosphorus oxide catalyst was studied.
研究了苯甲醛与1，3-丙二醇在钒磷氧催化剂作用下的缩醛化反应，考察了反应时间、醇醛比、催化剂用量、带水剂种类和用量等因素对苯甲醛1，3-丙二醇缩醛收率的影响。
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Firstly, 3-ethylthiobutanal was prepared from crotonaldehyde reacting with ethanehiol in triethylamine with high yield. Secondly, methyl acetoacetate was converted to 6-ethylthiohept-3-en-2-one by three steps via hydrolysis, condensation with 3-ethyltio-butanal and dehydration, then 6-ethylthiohept-3-en-2-one was cycloco ndensed with dimethyl malonate by Michael addition and Claisen condensation, followed by saponification and decarboxylation to give the intermediate of 5-(2-ethylthiopropyl)-cyclohexane-1,3-dione.
首先，以巴豆醛与乙硫醇为原料，在三乙胺的催化作用下高收率制得3-乙硫基丁醛；然后从乙酰乙酸甲酯出发，通过碱水解、与3-乙硫基丁醛缩合、脱水三步反应合成6-乙硫基-3-烯-2-庚酮，接着6-乙硫基-3-烯-2-庚酮与丙二酸二甲酯通过Michael加成和Claisen缩合成环，再通过皂化和脱羧反应生成中间体5-[2-丙基]-1，3-环己二酮；再与丙酸酐反应丙酰化，最后与0-3-氯-2-丙烯基羟胺肟化，得到目标化合物烯草酮。
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A synthesis of 2-pentylidene cyclopentanone starting from cyclopentanone and n-valeraldehyde through aldol condensation, followed by dehydration, was studied, and the yield reached 85.6%. 2-Pentenyl cyclopentanone was prepared in a yield of 95.0% from 2-pentylidene cyclopentanone with a hydrogenation methodology. Through Baeyer-villiger oxidation,δ-decalactone was synthesized in a yield of 63.9% from 2-pentenyl cyclopentanone with hydrogen peroxide.
研究了以正戊醛和环戊酮为起始原料，经羟醛缩合、脱水反应合成2-戊叉环戊酮，产率达到85.6%，2-戊叉环戊酮加氢制备2-戊基环戊酮，产率为95.0%，2-戊基环戊酮在双氧水作用下经Baeyer-villiger氧化重排反应合成δ-癸内酯，反应产率为63.9%，合成δ-癸内酯的总产率为52.0%，气相色谱分析纯度为98.7%。
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This article introduces the research progress in the improvement of the tradition wet strength agent and the development of new environment-friendly wet strength agents such as the polyacetal, the glutaric dialdehyde, the high polymer latex and so on.
介绍了国内外改进传统湿强树脂和聚缩醛类、戊二醛、高分子胶乳类等新型环境有好型湿强剂的研究现状及其作用机理，并且指出环境友好型湿强剂是今后研究发展的方向。
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In this work, isobutyl isobutyrate was prepared by the condensation of two molecular isobutyraldehyde in the presence of aluminium isobutoxide catalyst system.
依据间歇反应所得一系列数据，确定了异丁醛连续缩合反应工艺流程；考察了以异丁醛为原料，在 5～10℃，停留时间 1 5～ 2h ，在异丁氧基铝催化体系作用下，两分子异丁醛缩合成一分子异丁酸异丁酯；脱除催化剂后，粗产品精制得到纯度≥ 99 5 %的异丁酸异丁酯，异丁醛的转化率≥ 98 5 %，异丁酸异丁酯的选择性≥95 %。
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Proteomic comparison of glucose- and lactose-grown cells revealed that lactose and glucose were catabolized via the same degradation pathway, and the rate of glucose assimilation was higher than that of lactose.
长双歧杆菌NCC2705在乳糖中生长快于葡萄糖，它们的降解途径是相同的；转醛缩酶和丙酮酸激酶发生了翻译后修饰作用，推测转醛缩酶在43T和47S发生了磷酸化，而丙酮酸激酶在65S发生了磷酸化。
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In order to study the aldol condensation of 2.15-hexadecanedione on the surface of aluminium, the intermolecular condensation mechanism of acetone occurring on aluminum was simulated by using semi-empirical AM1 method embodied in MOPAC 6.0 program package. The optimized structures and geometry parameters of 5 transition complexes and 4 intermediates were given.First, 2 molecules of acetone coordinated with aluminum by electrostatic attraction.One atom of hydrogen of acetone migrated to aluminum because of t...
为了研究2，15－十六烷二酮在氧化铝表面的环合机理，选择小分子丙酮为模型化合物，用量子化学半经验AM1方法研究双分子丙酮在氧化铝表面的醛醇缩合机理，给出了反应过程中的5个过渡态和4个中间体的结构和几何参数，该催化反应可以认为是氧化铝分子与两分子丙酮分子发生静电络合作用，然后借助氧原子的负电荷导致脱氢并实现缩合，根据中间体的能量变化，推测有较稳定的铝复合物生成。
- 更多网络解释与醛缩作用相关的网络解释 [注：此内容来源于网络，仅供参考]
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acetimeter：乙酸[比重]计
缩醛树脂 acetal resins | 乙酸[比重]计 acetimeter | 乙酰化[作用] acetylation
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aldol：醛醇;丁醇醛
"aldoketene","醛烯酮" | "aldol","醛醇;丁醇醛" | "aldol condensation","醛醇缩合[作用]"
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aldol condensation：醛醇缩合[作用]
"aldol","醛醇;丁醇醛" | "aldol condensation","醛醇缩合[作用]" | "aldolactol","内缩醛"
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mercaptan：硫醇<类>
mercaptide 硫醇化合物;硫醇盐 | mercaptan 硫醇 | mercaptalation 缩硫醛作用
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on the hook：陷入圈套
bred uranium 增殖(生成的)铀 | on the hook 陷入圈套 | mercaptalation 缩硫醛化作用
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acetalization：缩醛化<作用>
"acetaldehydase","乙醛酶" | "acetalization","缩醛化[作用]" | "acetals","缩醛类"
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mercaptal：缩硫醛<类>
mercaptalation 缩硫醛作用 | mercaptal 缩硫醛<类> | menhaden oil 鲱<鱼>油
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meso：内消旋
进入上世纪90年代,以有机胶束(Micelle)*为模具合成出了小孔直径为亚纳米级的内消旋(Meso)多孔物质*. 此前,缩醛反应此前都是在强氧化催化剂的作用下,由羰基化合物(R-CO-R')和醛基化合物(R-CHO)与乙醇反应发生.
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Retrograde aldol condensation：逆行醛醇缩合
retrogradation <淀粉>老化;退减<作用> | retrograde aldol condensation 逆行醛醇缩合 | retrograde condensation 逆行缩合
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acetals：缩醛
另外:葡萄糖与醛不一样,不能与 2 分子醇作用而只能与 1 分子醇反应,不生 成缩醛(acetals) ,仅生成半缩醛(semiacetals) ,意味着分子中已有半缩醛基存在.