查询词典 benzyl

And while at pH=4-8, the dosage of combined collector reached 500g/t and the ratio of benzyl malonic acid and hydroximic acid is 2︰8, the flotation recovery of hematite reached its maximum of 95.6%.

当组合药剂用量为500g/t、矿浆pH值为4~8、苄基丙二酸︰C5-9羟肟酸=2︰8时，赤铁矿回收率达到最大值，为95.6%。

When the dosage of combined collector is 1000g/t and the ratio of benzyl malonic acid and hydroximic acid is 4︰6, on the condition of pH=7-9, the maximal flotation recovery of calamine was gained which was 75.6%.

当苄基丙二酸︰苯甲羟肟酸=4︰6、矿浆pH值为7~9、组合药剂用量为1000g/t时，菱锌矿回收率达到最大值，为75.6%。

Effect of several collectors on fersmite artificially synthesized under the condition of variable pH values and dosages were studied. The collecting characteristic of several representative collectors such as benzyl arsionic acid,α-styrolphhosphonic, diphosphonic acid, cyclic alkyl hydroximic acid and C(subscript 7-9) alkyl hydroximic acid was researched.

研究了几种捕收剂在不同pH值和不同用量条件下对人工合成的铌钙矿的捕收效果，考察了苄基胂酸，苯乙烯膦酸，双膦酸，环烷基异羟肟酸，C(下标 7~9)烷基异羟肟酸等几种代表性的捕收剂的捕收性能。

Investigation of major metabolic pathways of SFZ-47 in animals The metabolites of SFZ-47 in rabbit urine following oral administration were separated and detected with HPLC and LC-MS methods. On the basis of the chromatographic behavior and mass spectra of the metabolites as well as biotransformation pathways of drugs with the partial structure of SFZ-47, the hydroxylic derivative 4-(3H-1, 2- dihydro-1-pyrrolizinone-2-methylamino benzyl alcohol and the carboxylic derivative 4-(3H-1, 2-dihydro-1-pyrrolizinone-2-methylamino benzoic acid of SFZ-47 were proposed as two potential metabolites and were synthesized.

在动物体内主要代谢途径的确定用HPLC和LC-MS对家兔口服SFZ-47后尿中的代谢物进行了分离、检测，根据代谢产物的色谱和质谱行为以及与SFZ-47有类似结构部分的其它药物的代谢途径，推测其羟基衍生物[4-（3H-1，2-二氢-1-吡咯里嗪酮-2-甲基胺基）苯甲醇]与羧基衍生物[4-（3H-1，2-二氢-1-吡咯里嗪酮-2-甲基胺基）苯甲酸]是两种可能的代谢产物，遂用化学方法合成了这两种衍生物。

A batch sorption experiments showed that JX-101 had high sorption capacities for benzyl alcohol. While NaCl existed in the solution, equilibrium adsorption data fitted Freundlich isotherms in the studied concentration range, as well as NaCl was inexistent. And the adsorption capacity increased when the content of NaCl rose.

结果表明，JX-101树脂对苯甲醇具有良好的吸附性能，在研究的浓度范围内，吸附平衡符合Freundlich吸附等温式，NaCl存在时不影响吸附等温式的适用，且吸附量随NaCl含量的提高而增大。

The results of the present research are as follows, The correlation between physico-chemical properties of organic compounds and their competitive power was studied, and it was indicated that organic compounds preferable to form H-bonding with organic matter of sorbents have stronger competitive power; Sorption behaviors of ionizable organic compounds in different species and their competitive power were examined, and the results showed that phenols and carbonxylic acids with benzyl circle have much stronger competitive power in molecular species than in ionized species, because negative charges of anionic forms can depressed their adsorption on the surface of the sediment; in contrast, organic bases such as aniline and p-chloroaniline show weaker competitive power in molecular species than in ionized species, and this is because both species of the organic bases could adsorb strongly onto the sediment; there is a correlation between competitive power of organic pollutants in multi-solute systems and their sorption isotherm nonlinearity in single-solute systems, and organic compounds whose sorption isotherms is linear in single-solute systems hardly have competitive power in multi-solute systems; Competitive sorption effects in more than two-solutes systems was studied, and it was exhibited that mixture of two cosolutes each of which could suppress sorption of nominal solute onto the sediment had synergistically competitive sorption effect on the nominal solute; A method about incorporating sorption/desorption of organic pollutants into river water quality model was developed, and discussion about degree of sorption/desorption effect on model prediction for different organic compounds was made, which will provide theoretical basis and practical processes for setting up more accurate water quality model.

论文主要取得了以下研究成果。(1)有机化合物的吸附竞争能力与其物化性质具有相关性，易与沉积物有机质形成氢键的化合物其竞争能力也比较强；(2)可离子化有机化合物的吸附竞争能力与其存在形态有关。酚类、含苯环的羧酸类化合物，其离子态的吸附竞争能力远小于分子态，其机理为有机酸阴离子所带的负电荷抑制了表面吸附能力，主要发生分配作用；而苯胺类化合物，其离子态和分子态都表现出显著的竞争能力，而且离子态的竞争能力略强于分子态，原因在于有机碱阳离子所带的正电荷促进了其表面吸附能力；有机化合物竞争能力的强弱与其单组分吸附等温线的非线性程度具有一定的相关性，吸附等温线近似为线性的化合物没有或只具有微弱的竞争能力；(3)对目标有机化合物的吸附具有竞争效应的有机化合物混合后，将对目标有机化合物的吸附产生协同竞争效应；(4)以京杭运河为例，率先提出了将有机污染物的吸附／脱附作用及水文水力参数耦合到水质模型中的方法，并讨论了吸附／脱附作用对不同有机污染物预测模型的影响，为建立更准确的水质模型及进行更客观的风险和生态评估提供了参考依据。

By treatment of (4R)-carboxy-(2S)-phenylthiazolidine with isocyanic acid benzyl ester in CH_3COOH/(CH_3CO)_2O system,the reaction time is shortened from 17 h to 3 h,and the yield of (7aR)-3-phenyl-1H,3H-imidazo[1,5-c] thiazole-(6H, 7aH) 5,7-dione is raised from 75% to 93%.

改用异氰酸苄酯为关环试剂环化合成了(7aR) 3 苯基 6 苄基 1H，3H 咪唑并[1，5 c]噻唑 5，7 二酮，选用CH3COOH/(CH3CO)2O代替CH3COOH作溶剂，反应时间由17h缩短为3h，产率从75%提高到93%。

Benzyl isothiocyanate and phenethyl isothiocyanate, are derived isothiocyanates from cruciferous vegetable, including watercress, broccoli and cabbage.

苯甲基异硫氰酸酯和苯乙基异硫氰酸酯是来自於十字花科蔬菜的衍生物，常见的十字花科蔬菜包含了花椰菜、甘蓝菜、芥菜…等。

The intramolecular Reformatsky-type reaction of benzyl bromide and keto group is the key step.

其中关键步骤是苄溴与酮基的分子内Reformatsky型反应。

Thesis describes our studies on :(1)Manganese initiated oxidative free radical reactions between 2-benzyl-1,4-quinones and dimethyl malonate.

本报告共分为两部分：(1)利用2-苯甲基-1，4-醌类化合物、丙二酸二甲酯与醋酸锰进行氧化性自由基环合反应(式1)。

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。

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。