查询词典 isoamyl

The simple method of one step synthesis of isoamyl isovalerate from isovaleraldehyde under aluminum isoamyloxide catalyst and ZnCl\-2 co catalyst was studied.

在自制的异戊醇铝催化剂和无水氯化锌助催化剂作用下，以异戊醛为原料一步合成出异戊酸异戊酯。

The influences of the reaction time,the reaction temperature,the mole ratio of isovaleric acid to isoamyl alcohol,the quantity of solid surperacid catalysts on the conversion rate of iaovaleric acid were studied.

介绍了一种利用超强酸TiO2/SO2－4催化合成异戊酸异戊酯的新工艺，研究了固体超强酸催化剂用量、酸醇摩尔比、反应时间和反应温度对异戊酸转化率的影响。

Germanotungtic acid catalyst can be used repeatedly. germanotungtic acid ; catalysis ; synthesis ; isoamyl salicyl

杂多酸及其盐是由杂多阴离子与反荷阳离子按确定比例组成的多核配合物，具有金属氧化物和

The product was made from ritric acid and isoamyl alcohol with sulfuric acid as catalyst, and urea as stabilizator in the reaction.

以异戊醇和50％HNO3为原料，50％H2SO4为催化剂，尿素为反应稳定剂，合成了柴油十六烷值改进剂——硝酸异戊酯。

Results The mixing, loading and storing processes of the construction, might generate lots of occupational hazards, including toluene, dimethylbenzene, trimethylbenzene, isopropanol, butyl alcohol, propanol, methyl methacrylate, butyl acetate, methyl isobutyl ketone, methyl ethyl ketone, acetic ether, nitro-cotton, n-hexane, n-heptane, carbinol, ethanol, ethyl propionate, diisobutyl ketone, glycol ether, isoamyl acetate, 2,4-toluene diisocyanate, isophorone, noise, power frequency electric fields.

结果 该项目在混兑生产和装卸、仓储过程中，可能产生的职业病危害因素主要有甲苯、二甲苯、三甲苯、异丙醇、丁醇、丙醇、甲基丙烯酸甲酯、乙酸丁酯、甲基异丁基甲酮、丁酮、乙酸乙酯、硝化棉、正己烷、正庚烷、甲醇、乙醇、乙酸丙酯、二异丁基甲酮、乙二醇乙醚、乙酸异戊酯、2，4甲苯二异氰酸酯、异佛尔酮、噪声、工频电场。

Extracted DNA by CTAB, in proportion to the additions of PVP and β-mercap toethanol to the extraction buffer were capable of preventing browning from taking place in the extraction, Tris-Phenol (Stabilized with 0.1M Tris, pH 8.0)/Chloroform/isoamyl alcohol were used to remove protein and impurity in the second extraction, during crude DNA used to Isopropanol DNA and deterged by DNA detergent, without using RNase remove RNA, we detected the quality and concentration of DNA respectively for normal leaves and drought stress leaves by Agarose gel electrophoresis of genomic DNA and ultraviolet spectrometry photo.

用20%聚乙二醇(polyethylene glycol，PEG6000)模拟干旱，采取CTAB提取缓冲液，按一定比例加入PVP和β-巯基乙醇，用Tris平衡酚－氯仿－异戊醇除去蛋白质及杂质，在粗提时用异丙醇沉淀DNA，并用DNA洗液（10mmol/L醋酸铵，75%乙醇）洗涤DNA，在纯化时用乙醇沉淀DNA，且没有加入RNase去除RNA的方法，分别提取2个品种正常和干旱胁迫的苹果属叶片总DNA，并对提取的DNA进行琼脂糖凝胶电泳和紫外分光光度计检测。

Compounds 3a-3d, 4a-4d, 5a-5d, 6a-6e and 7a-7e were prepared with a new efficient method, in which the aromatic amines were diazotized with isoamyl nitrite in EtONa/EtOH under refluxing condition, and mono -, bis -and tetrakis -substituted calix [4] arenes were obtained respectively as main product by diazo-coupling in different molar ratio to calix [4] arene.

一，提出了一个有效的新方法合成含有芳香偶氮基团的杯[4]芳烃衍生物3a-3d；4a-4d；5a-5d；6a-6e和7a-7e：即在非水溶剂乙醇中用亚硝酸异戊酯，在强碱乙醇钠存在下对芳香胺进行重氮化，得到芳香重氮酸盐沉淀，过滤，然后加入杯[4]芳烃的四氢呋喃溶液，通入CO〓气体调节溶液的pH值为7-9，使其发生偶联反应。

At the same time, with reference to the conditions of synthesis of methyl ester of salicylic acid, we combined ethyl ester of salicylic acid, salicylic acid-n-butyl, isobutyl salicylate, amyl salicylate, isoamyl salicylate and salicylic acid benzyl ester,besides, experimented the possibility for series of ester synthesis catalyst with Sodium bisulfate as a catalyst .

同时参照水杨酸甲酯的合成条件合成了水杨酸乙酯、水杨酸丁酯、水杨酸异丁酯、水杨酸戊酯、水杨酸异戊酯和水杨酸苄酯，实验了以硫酸氢钠为催化剂合成系列酯的可能性。

The influences of the dosage of Na2S, pH values,sulfidization time and the types of pH modifiers on the flotation of cerusite and limonite have been studied in this paper,and the performance of ethyl xanthate,butyl xanthate,isobutyl xanthate,amyl xanthate and isoamyl xanthate are studied in detail respectively.

详细研究了硫化钠用量、矿浆pH值、硫化时间以及pH调整剂种类对白铅矿和褐铁矿浮选的影响，重点考察了乙基黄药、丁基黄药、异丁基黄药、戊基黄药和异戊基黄药五种黄药的捕收性能。

Pure mitochondrial DNA was successfully obtained by using SDS and proteinase K to crack mitochon, phenol: chloroform: isoamyl alcohol extraction to remove protein, and digestion with RNase A.

用SDS和蛋白酶K裂解线粒体，经酚：氯仿：异戊醇抽提除去蛋白，并用RNaseA消化从而得到单纯线粒体DNA。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。