查询词典 dichloride

The content of benzene compounds extracted by methane dichloride from the leavy surfaces of trees inside the factory areas reached to 88. 33 mg/kg, the levels of benzene, methylbenzene and dimethylbenzene were 36. 680 mg/kg, 10. 22 mg/kg and 41.43 mg/kg respectively in the coking factories.

厂区内植物叶片表面二氯甲烷提取物中苯系物含量高达88.33mg/kg，其中苯36.680mg/kg，甲苯10.22mg/kg，二甲苯41.43mg/kg。

By the polycondensation of amino acid 5-fluorouracil -1, 3-dipropyl esters with bis (2-chloroethyl) phos- phoramidic dichloride in the presence of 〓 or in vacuo, ten new polymers containing 5- fluorouracil, nitrogen mustard and amino acid were synthesized.

将1，3-双-5-氟尿嘧啶与二氯膦甲酸乙酯或二氯膦乙酸乙酯在DMF中反应制备得到20个三元共聚物，体外抗肿瘤试验表明：含有甘氨酸、缬氨酸、苯丙氨酸和酪氨酸的聚合加显示了一定的选择性，并且分析讨论了生物活性与结构之间的关系。

Five bistin Schiff base complexes were synthesized by the reaction of bistin dichloride with Schiff base derived from amino acids and salicylaldehyde in the presence of triethylamine,and were characterized by IR,1HNMR and MS.

二烃基锡配合物的结构类型及其具有较强的抗癌活性引起了人们极大的兴趣。大量的研究表明，有机锡化合物的生物活性主要取决于烃基，但配位基团也有一定的影响[1-3]，尤其在水解、输送等过程中。某些配体对生物活性的发挥还有协同作用。

In order to obtain versatile ulitity of host molecules, three new chiral calix [4] crown ethers containing aza, thio atoms bearing two chiral sites provided by -cysteine ester were synthesized by the condensation of calix [4] arene diacid dichloride with oligoethylene glycol bridged bis-amino acid methyl ester. All new compounds were characterized by NMR, MS and elemental analysis.

以-半胱氨酸为手性源，利用多甘醇二氯醚在碱性条件下对半胱氨酸巯基进行烷基化反应，成功地合成了多甘醇醚链桥联的半胱氨酸衍生物，醚化反应后，在高度稀释条件下与对叔丁基杯[4]芳烃二乙酰氯进行双功能基缩合反应成功地合成了新型的手性杯[4]含氮、硫杂冠醚，并利用〓H NMR、MS等谱图手段对其结构进行了表征。

A method is introduced for quantitative determination of 1,2-dichloride ethylane by gas chromatography with PEG-20M chromatographic column,FID and using undecane as internal standard.

介绍用气相色谱仪、以PEG-20M色谱柱和FID检测器对1，2-二氯乙烷进行的一种定量测定方法，其内标物选用正十一烷。

This is the first report of pectenolone and pectenoxanthin, two types of carotenoid, in the muscle of the Yesso scallop.3 Roles of the carotenoids composition and accumulation in Yesso scallopThe method for detecting carotenoids using reverse phase high performance liquid chromatography was developed. The conditions of RP-HPLC analysis were an analytical scale (200×4.6 mm, inner diameter 5μm) Eclipse XDB-C18 column of Agilent corporation; 10μl injection volume; 25°C column temperature; acetonitrile, methanol and methylene dichloride mobile phase (40:56:4, V/VV) with 0.1% BHT; 1.0 ml per minute flow rate; 450 nm UV-VIS detector; 8 minutes elution.The carotenoids from orange muscle of Yesso scallop of 7, 10, 12, 15, 18, 22 months old was detected using the method refered above.

通过柱层析、高效液相等手段对橘红色闭壳肌中的主要类胡萝卜素进行了提取分离，分离提纯得到两种类胡萝卜素，并通过MS、~1H-NMR和~(13)C-NMR对其进行结构鉴定，结果表明(3S，3\'R)-3，3\'-dihydroxy-7\'，8\'-didehydro-β，β-Caroten-4-one和(3S，3\'S)-7，7\'，8，8\'-tetradehydro-β，β-Carotene-3，3\'-diol，俗称pectenolone和pectenoxanthin是橘红色闭壳肌中的主要类胡萝卜素，这是国内外首次对虾夷扇贝闭壳肌中的类胡萝卜素进行提纯及结构鉴定。3虾夷扇贝类胡萝卜素的种类组成和累积变化规律建立了橘红色闭壳肌中类胡萝卜素的HPLC分析定量检测技术：色普柱为Agilent公司的Eclipse XDB-C18柱200mm×4.6mm，i.d.5μm进样体积，5μl ；流速1ml/min；检测波长450nm；柱温25℃；流动相为乙腈：甲醇：二氯甲烷(V/V/V=40：56：4并加入0.1%的BHT；分离时间为8min。

Microcapsules of E-ink was prepared through in situ polymerization, in which titanium dioxide modified by PMMA was introduced as displaying particles dispersed in carbon dichloride, and urea-formaldehyde resin modified with melamine as wall material. Also, the polymerization process was studied to optimize the reaction conditions.

采用原位聚合法制备了以三聚氰胺改性脉醛树脂为壁材，聚甲基丙烯酸甲酯修饰二氧化钦为显示颗粒，四氯乙烯为分散介质的电子墨水微胶囊，并对制备工艺进行优化。

Wedgeplug O-Seal plug valves with their positive, no-leak features are not only recommended as the best general purpose valves for handling hydrocarbons, vegetable oils, solvents, etc., but are ideal for such tough service as butane, propane, butadiene, acetone, ethyl alcohol, ammonia, anhydrous ammonia, benzene, vinyl chloride, dry chlorine, Dowtherm, ethane, ethylene, hydrogen chloride, napthalene, oxygen, hydrogen, phthalic anhydride, dry phosgene, phosphoric acid, potassium carbonate, styrene, molten sulphur, sulphur dichloride and related services within a temperature range from -300oF to + 450oF within pressure limits of the valves.

楔塞O形密封旋塞阀具有积极的、无泄漏特性，不但是最好的通用的阀门，用于处理碳化氢，植物油，溶剂等，还特别适用于严酷的应用环境，如丁烷，丙烷，丁二烯，丙酮，乙醇，氨，无水氨，苯，氯乙烯，干氯，道氏热载体，乙烷，乙烯，氯化氢，萘，氧，氢，邻苯二甲酸酐，干碳酰氯，磷酸，碳酸钾，苯乙烯，融化硫，二氯化硫，以及温度在-184oC至232oC之间，压力在阀门额定压力等级范围内的有关应用。

Chloroacetic acid,chloromethyl ether,acetone,mphenylenediamine,butyl acetate,ethyl acetate,methylene chloride,ethylene dichloride,dioxane.

氯乙酸，氯甲醚，丙酮，间苯二胺，醋酸丁酯，醋酸乙酯，二氯甲烷，二氯乙烷，二氧六环。

The main work of the article was to synthesize a suitable monomer, bis(4-carboxyphenyl)phenyl phosphine oxide, as the retardant for poly fibre. The procedures were divided into three steps: dichloride phenyl phosphine oxide was synthesized and bis(4-methyl phenyl)phosphate oxide was prepared from DCPP by Friedel-Crafts reaction.

双苯基氧化膦是一种适用于PET纤维阻燃改性的新型有机磷阻燃剂，本文主要研究了其合成工艺，整个合成路线分为三步，通过Friedel-Crafts烷基化反应制备了苯基二氯化膦，进而通过Friedel-Crafts酰基化反应合成了双苯基氧化瞵，经氧气、高锰酸钾氧化得到了产品BCPPO。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。