二酸

HDI's molecular structure is a special saturated straight chain and it has highly unsaturated double bonds.It has such very lively and chemical properties that can be used to form polyurea with water. And it also reacts with polyurethane to form polyol, reacts with amine to biuret.

己二异氰酸酯分子具有特殊的直链饱和结构和含有高度不饱和双键的异氰酸酯基团，化学性质非常活泼，能够与水生成聚二脲，与多元醇反应生成聚胺酯，与胺反应生成缩二脲。

Preparation of water-borne polyurethane dispersion modified by epoxy resin;2. Preparation and Application of water-borne curing agent from cashew nut shell liquid;3. Synthesis and performance study of water-borne photosensitive PU acrylate PUA

以甲苯二异氰酸酯、聚丙二醇醚(PPG 2 2 0 )和二羟甲基丙酸为原料制备了阴离子型水性PU 乳液，研究了DMPA用量、n /n值、交联剂TMP用量对水性PU 乳液与涂膜性能的影响，得出了制备阴离子型水性PU 的最佳配

Their structures were characterized as dihydroconiferyl dihydro-p-coumarate, vanillin, apocynin, p-hydroxybenzaldehyde, syringaldehyde, syringic acid, syringylethanone,α-hydroxypropiosyringone, coniferyl aldehyde, dihydroconiferyl alcohol, 2-hydroxyphenylpropanol, and 3-hydroxy-4-methoxy-phenylethanol, respectively.

结果 从该植物中分离得到12个酚性化合物，其结构分别为二氢松柏醇二氢对羟基桂皮酸酯，香草醛，罗布麻宁，对羟基苯甲醛，丁香醛，丁香酸，丁香乙酮，α-羟基丁香丙酮，松柏醛，二氢松柏醇，2-羟基苯丙醇和3-羟基－4-甲氧基苯乙醇。

Hydroxyl octanoic acid(1) was synthesized from heptaldehyde by a four-step reaction of nucleophilic substitution,displacement reaction,acid hydrolysis and deaminization.

以正庚醛为原料，经过亲核取代、置换反应、酸水解及碱化脱氨等4步反应合成了制备3，6-二己基-1，4-二氧杂-2，5-二酮的中间体——α-羟基辛酸(1)；1经对甲苯磺酸催化脱水得辛交酯。

From the reaction mechanism, which involved formation of benzodiazepinium ethoxycarbonylmethylate, the reaction mechanism, which involved formation of benzodiazepinium ethoxycarbonyl- methylate followed by cycloaddition reaction, was tentatively proposed.

通过研究反应过程中分离出的副产物反丁烯酸二乙酯III和4，5-二氢吡唑-3，4，5-三羧酸乙酯IV，初步提出了反应经过乙氧羰基甲基化苯并二氮杂卓翁中间体V再发生环加成反应的机制。

Durable formaldehyde-free phosphorus flame retardant for cotton,FRC-F,was synthesized with dimethyl methylphosphonate,phosphoric pentaoxide and ethylene glycol-glycerol mixt.

利用甲基膦酸二甲酯、五氧化二磷、乙二醇、丙三醇的混合物成功地合成了一种无甲醛棉用耐久性膦系阻燃剂，探讨了阻燃剂FRC-F、多元羧酸交联剂BTCA、催化剂NaH2PO2、柔软剂等应用于棉织物的工艺。研究结果表明：阻燃剂FRC-F是一种值得研究和开发的无甲醛棉用阻燃剂

During the manufacturing of the critical intermediate cephalosporin nucleus --7-amino-3-chloro-cephalosporanic acid diphenylmethyl ester hydrochloride salt, first the feasibility of the one-pot synthetic route of open loop, closed loop and ozonization when chlorine is passed over is qualified by experiments. Then the critical factors that will influence this reaction are studied as follows: the mol ratio of triphenyl phosphite and Diphenylmethyl 3-hydroxy-7-phenylacetaminoceph-3-em-4-carboxylate-l-oxide is four to one; the quantity of the stablizer should be at least more than two to one. The temperature of the system must be 25℃ when chlorine is passed over so that the hydrochloride can be precipitated to obtain cephalosporin nucleus of cefaclor--7-amino-3-chloro-cephalosporanic acid diphenylmethyl ester hydrochloride salt.

在制备关键中间体头孢母核7-氨基-3-氯头孢烷酸二苯甲酯盐酸盐时，先通过实验验证把开环、闭环、臭氧化三步在通入氯气时并为一锅煮的合成路线的可行性之外，又研究了影响该反应的几个重要因素：亚磷酸三苯酯与3-羟基-7-头孢烷-5-亚砜-2-甲酸二苯甲酯的摩尔比为4：1；稳定剂2-甲基-2-丁烯的用量至少大于2：1，通入氯化氢气体时体系温度在25℃时盐酸盐则能够顺利析出，获得头孢克洛的头孢母核—7-氨基-3-氯头孢烷酸二苯甲酯盐酸盐。

Objective To observe the antagonistical effect of DHA and EPA on the interference to metabolism of protein, DNA, RNA and the expression of bcl-2, bax gene by excessive iodine.

目的 观察二十二碳六烯酸二十碳五烯酸对高碘所致的脑蛋白质、核酸代谢和bcl-2、bax基因表达损伤的拮抗效应。

Water,cetearyl alcohol,butylene glycol,ceteth-20,glycolic acid,cyclomethicone,citric acid,sodium hydroxide,xanthan gum,lactic acid,phenoxyethanol,sodium citrate,magnesium aluminium silicate,citrus aurantium dulcisoil,disodium edta,pentadecalactone,methylparaben,iris germanica root extract,butylparaben,ethylparaben,propylparaben,silica,chlorhexidine digluconate.citrus aurantium amaraoil,limonene,linalool

水， 棕榈醇，丁二醇，鲸蜡醇聚醚 20，甘醇酸，环甲硅脂，柠檬酸，氢氧化钠，山羊胶，乳酸，苯氧乙醇，柠檬酸钠，硅酸镁铝，甜橙油，乙酸乙二胺二钠，环十五内酯，羟苯甲酯，鸢尾花根萃取，羟苯丁酯，羟苯乙酯，羟苯丙酯，二氧化硅，洗必泰葡萄糖酸盐，苦橙油，柠檬精油，芳樟醇

Sodium5sulfoisophthalic acid dimethyl ester was prepared by sulfonation of mC 6H 4 2 with chlorosulphonic acid , treatment of the 5sulfoisophthalic acid with methanol to esterify the -CO 2H groups and separation of the product in the form of sodium salt of sulfonic acid.

研究了由氯磺酸和间苯二甲酸经磺化及酯化反应合成间苯二甲酸二甲酯磺酸钠盐的工艺方法，探讨了投料比、反应温度、催化剂用量和反应时间对产物的影

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。