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- The aqueous phase were acidified with sulfuric acid, taken to dryness and extracted with methanol (water soluble acidic fractions) and concentrated for TMS derivatives. 有机相(碱性和中性部分)经浓缩并硅烷化,水相经酸化、吹干、提取(提取物为酸性水溶性部分)并硅烷化。
- Petroleum products--Determination of water soluble acids and alkalis 石油产品水溶性酸及碱测定法
- water soluble acid 水溶性酸
- Water soluble functional vegetable protein. 水溶性植物功能蛋白。
- Three different zones A,B,C have been tested to F, Cu, Zn, Se,Ca,P and Sulfuric acid ion in soil,water,blood and diet. 通过A、B、C三个不同地区的土壤、饮水、饲草料、血液中F、Cu、Zn、Se、Ca、P和硫酸根离子的检测,证实了A区饮水氟为2.;7mg/L,硫酸根离子为165
- A new water soluble color reagent 1 (5 bromo 2 pyridylazo) 2,7 hydronaphthoquinone 6 sulfonic acid (5 Br PADN S) was synthesized. 报道了水溶性 1-(5-溴-2-吡啶偶氮)-2,7-萘二酚-6-磺酸(5-Br-PADN-S)的制备方法及其分析特性。
- A water soluble metal antirusting agent was prepared. 制备了一种水溶性金属防锈剂;
- Methylthymol Blue, tetrasodium salt, water soluble, pure... 询价 甲基百里香酚蓝(四钠盐);
- Formaldehyde is a water soluble and volatilizable pungent gas. 本课题在上海市11家医院病理科环境中,进行了空气中甲醛浓度水平的监测,对116名病理科医师进行了问卷调查和嗅觉功能、肺功能检测。
- A series of water soluble N-maleyl chitosan and N-phthaloyl chitosan was synthesized in an acid homogeneous solution under room temperature. 利用马来酸酐和邻苯二甲酸酐在均相条件下与壳聚糖发生N酰化反应,制备了一系列水溶的N酰化壳聚糖。
- It comprises XC polymer, YDC LN additive and water soluble weighting agent. 该体系主要由XC聚合物和YDC -LN助剂以及可水溶性加重剂组成。
- Conclusions Chitosan and it s water soluble derivatives have no cytotoxicity. 结论壳聚糖及其水溶性衍生物无细胞毒性。
- Water soluble multiwall carbon nanotube has good dispersiveness and stability. 采用柠檬酸钠还原氯金酸制备了金水溶胶,研究了影响金纳米粒子的粒径的相关因素。
- Two types of water soluble resin are tested in alkali magnesium olivine sand. 用两种水溶性树脂在碱性镁橄榄石砂上进行了试验。
- In this paper, the methyl cinnamate was synthesized from cinnamate acid and methanol by using strongly acidic ion exchange resin as catalyst. 以磺酸型阳离子交换树脂为催化剂,由肉桂酸和甲醇合成了肉桂酸甲酯。
- The main characteristics of this method are that reaction is quick, purity is high, operation is simple, clean fatty acid ion replaces halogen ion that is noxious, and it is greener. 该方法的主要特点是反应快速纯度高,操作简便,清洁的脂肪酸离子代替有毒的卤素离子,更加绿色。
- The deduced amino acid sequence is 77% identical to the gene from Citrus reticulata (GenBank,AF312229), and only 33% identical to the gene from Fragaria ananassa (GenBank AF000521), was suggested to encode a soluble acid invertase. 在GenBank中进行同源性检索的结果表明,该成员编码的氨基酸与植物可溶性酸性转化酶的氨基酸同源性较高,与宽皮柑橘(GenBank登记号AF312229)可溶性酸性转化酶基因编码的氨基酸具有77%25的同源性,而与定位于细胞壁的(不溶性)酸性转化酶同源性较低,最高仅33%25(Fagaria ananassa,GenBank AF000521)。
- A method for the determination of arsenic in fumaric acid by HG AFS was developed. The sample was decomposed in sodium hydroxide solution and fumaric acid was transferred into water soluble sodium fumarate. 用氢氧化钠溶液分解富马酸使其转化为水溶性富马酸钠 ,然后用氢化物发生 -原子荧光光谱法测定了试样中的砷。
- Water soluble C9 petroleum resin was prepared by radical solution copolymerization with C9 fraction, a by-product from the production of ethylene, and monomers such as maleic anhydride ( MA ) and acylic acid ( AA ). 本文利用乙烯装置副产的C_9馏份,与马来酸酐(MA)、丙烯酸(AA)极性单体共聚,合成出对工业循环水具有阻垢作用的水溶性C_9石油树脂。
- Some reactions such as those between soluble acids and bases occur very rapidly. 有些反应,象酸碱溶液之间的反应进行得很快。