甲基
- 与 甲基 相关的网络例句 [注:此内容来源于网络,仅供参考]
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Pentanediol dithiophene ester was synthesized by means of alcoholysis reaction using 2,4-Pentanediol and Aroly chloride as raw materials, and 1H NMR spectrum was characterized and it can not be explained.
以2,4-戊二醇和芳酰氯为原料,通过醇解反应合成了一种新的内给电子体化合物二(2-噻吩甲酸)-2,4-戊二醇酯,表征其1H-NMR谱,发现化学位移在2附近出现了三组亚甲基峰,无法解释。
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This review mainly summarized the reaction mechanism and the method of methyl oxided into aldehyde group.
这一部分主要对甲基氧化生成醛基的反应机理、方法及化合物的用途进行综述。
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The method of 4-methylimidazole synthesis using pyroracemic aldehyde was selected,and flow chart and operation process were studied.
本文对4-甲基咪唑常用的几种合成方法进行了介绍,对其工业化生产的优缺点进行了对比,最终选定了丙酮醛法,并给出了工艺流程图和操作步骤。
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An aliquot of the reaction mixture was injected into a C18-column with a mobile phase consisting of 0.05 molL^(-1) phosphate buffer (pH 5.5)-methanol (65:35, V/V) and detected at 235 nm.
土壤样品用0.6 molL^(-1) KOH提取,经对甲基苯磺酰氯衍生化后,注入C18柱中分离,用紫外检测器在235 nm波长检测,流动相组成为0.05 molL^(-1)磷酸盐缓冲液(pH 5.5):甲醇=65:35。
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CALORIMETRIC TITRATION FOR COORDINATION REACTION OF 2, 3-BENZO-8, 11, 15-TRIMETHYL-18-CROWN-6 WITH ALKALI AND ALKALINE EARTH METAL IONS
若干碱金属及碱土金属离子与2,3-苯并-8,11,15-三甲基-18-冠-6配位反应的量热滴定研究
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Covalent modification of four isolated alkannin derivatives (alkannin, acetylalkannin,β,β dimethylacrylalkannin and β acetoxyisovalerylalkannin, respectively) on rabbit muscle latate dehydrogenase and yeast Alcohol Dehydrogenase has been studied.
为研究紫草萘醌类化合物的细胞毒性作用机制,从新疆软紫草根中分离出四种紫草萘醌类化合物β,β二甲基丙烯酰阿卡宁(1),乙酰阿卡宁(2 ),β乙酰氧基异戊酰阿卡宁(3)和阿卡宁(4)。
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In this dissertation, the stable radical cation salts ofphenothiazine and 10 - alkylphenothiazine alky=〓(〓 hexachloroantimonate,perchlorate and iodide were prepared by one- electron oxidationwith 2,2,6,6-tetramethyl - 4 -acetyloxypiperidine oxoammoniumhexachloroantimonate, perchloric acid/hydrogen peroxide andmolecular iodine respectively, and they were characteried by UV -Vis spectroscopy and ESR spectroscopy.
本文的主要内容有:吩噻嗪和10-烃基吩噻嗪分别被碘、高氯酸/过氧化氢,2,2,6,6-四甲基-4-乙酰氧基哌啶氧铵六氯锑酸盐氧化为相应的正离子自由基碘盐、高氯酸盐、六氯锑酸盐,并用UV-Vis光谱和ESR波谱进行了鉴定和研究。
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This paper introduces the preparation and application of the sulfonated alkyl polyglycoside in drilling fluids.
介绍了磺甲基烷基糖苷的制备方法及其在钻井液中的应用。
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When the number of methylene groups in alkylamine was larger than 16,the intercalation nanocomposites were obtained.
当烷基铵中的亚甲基数大于十六时,能够获得插层型的纳米复合材料。
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A process for preparing alkylene glycols including reacting an alkylene oxide with water in the presence of a combination of additives and an anion exchange resin, wherein the combination of additives comprises carbon dioxide and an organic or inorganic base provided in an amount sufficient to maintain a pH of the reaction mixture between about 5.0 and 9.0, with the proviso that, when the base is bicarbonate or carbonate, then the anion exchange resin is a trimethyl benzyl ammonium anion exchange resin.
制备亚烷基二醇的方法,包括让烯化氧与水在添加剂组合和阴离子交换树脂存在下进行反应,其中添加剂组合包括二氧化碳和以足以保持反应混合物的pH值在约5.0和9.0之间的量提供的有机或无机碱,前提条件是当碱是碳酸氢盐或碳酸盐时,阴离子交换树脂是三甲基苄基铵阴离子交换树脂。
- 推荐网络例句
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Now, however, all children continue in "comprehensive" schools, and the eleven-plus determines which courses of study the child will follow.
然而现在,所有的孩子都要在综合学校继续学习,所以这次考试只是决定他们将要学习哪些课程。
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Cultivatable land , and led to a general recognition that development must not be carried at the cost of agriculture .
城区的迅速扩大在很多情况下侵占了宝贵的可耕地,使人们普遍认识到发展不能以牺牲农业为代价。
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Detailed Intrinsic Reaction Coordination calculations were carried out to guarantee the optimized transition-state structures being connected to the related tautomers.
同时,做了详尽的内禀反应坐标计算,以保证所得到的过渡态连接相应的始末异构体。