查询词典 phenol-phthalein

A new method for the determination of trace bromate in water is introduced using phenol derivatization followed by HPLC-UV detection.

针对水中微量溴酸盐的测定问题，建立了一种用苯酚为衍生试剂、用HPLC-UV检测的柱外衍生测定方法。

The effects of sodium laurylsulfonate and butanol on upper critical solution temperature s for water-phenol were studied by means of cloud point.

浊点法研究了十二烷基磺酸钠和正丁醇对水-苯酚系统上临界溶解温度的影响，结果发现在试验的浓度范围内，该系统的上临界溶解温度随十二烷基磺酸钠质量分数的增大而线性下降。

Flavor substances of pumpkin were qualitatively analyzed and 22 kinds of chemical components were identified by GC-MS. The main compounds extracted are Bornyl acetate, Camphol and 4-methy- Phenol, respectively.

首次对南瓜(6号京银栗)进行了芳香物质的定性测定，发现南瓜中含有22种芳香性成分，主要为醋酸冰片酯、樟脑、四甲基苯酚、4，6，6-三甲基-双环[3.1.1]-3-庚烯-2-酮。

Phenol compound and formaldehyde ,etc., these materials have function of accelerating the canceration.

酚类化合物和甲醛等，这些物质具有加速癌变的作用。

"The simplest one, carbolic acid (C6H5OH), is also called phenol;"

最简单的成员石炭酸(C6H5OH)，也称为苯酚。

Carbolic acid:Organic compound, simplest member of the class of phenol s.

石炭酸：最简单的酚类有机化合物。

The phenol s carboxylation is a typical organic chemical reaction, which was discovered years ago.

酚类的羧化反应是一个很早就发现的、典型的有机化学反应，称为Kolbe-Schmitt反应。

A new type of polymer supported β cyclodextrin is synthesized and its effect on catalytic carboxylation of phenol with carbon tetrachloride is investigated.

制取了一类新的聚苯乙烯（交联度2％）键联β－环糊精催化剂，研究了该催化剂对苯酚与四氯化碳的羧化反应。

In early times, the method of direct carboxylation on solid phase was often adopted in the phenol s carboxylation.

本文研究以邻甲酚为原料，在添加剂存在下，以国产煤油为溶剂，进行悬浮羧化反应，合成邻甲基水杨酸，获得了良好的效果。

Phenol resin was modified by choosing cashew nut shell oil, polysulphone as modifier and adding other assistant.

以腰果壳油、聚砜为改性剂对酚醛树脂进行增强改性，将改性后的酚醛树脂通过湿缠绕方法和玻璃纤维粘合，制成了水润滑轴承外壳，并研究了玻璃纤维含量对水润滑轴承外壳压缩强度的影响。

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。