查询词典 formaldehyde solution

A simple one-step procedure was described for the synthesis of mesoporous monolith and composite sphere, in which hydrolyzation of tetraethyl orthosilicate and polymerization of urea with formaldehyde occurred at the same time.

利用酸性条件下正硅酸乙酯的水解和脲醛树脂的聚合反应同时一步原位进行的方法合成了二氧化硅复合粉体(包括核壳微球结构和网状结构)和块体凝胶材料。

A new kind of non-formaldehyde water-resistant emulsion is prepared by modifying polyvinyl acetate with the surfactant-free copolymerization to polymerize vinyl acetate and the acrylic acid monomers,and then by using oxaldehyde to make the emulsion crosslinked to form a kind of net structure.

通过醋酸乙烯酯共聚的改性方法，用醋酸乙烯与丙烯酸系单体共聚，采用无皂乳液聚合，后用乙二醛交联，使乳液形成网络结构，制备了一种无甲醛的新型耐水性乳液。

Power, formaldehyde, pentaerythritol, stupid anhydride four workshops.

动力、甲醛、季戊四醇、笨酐四个车间。

The positive rate was 62.5%. The allergens with higher positive rate were nickel sulfate, 4 Phenylenediamine base, fragrance mix, potassium dichromate and formaldehyde. The positive results were found in patients with face dermatitis, eczema, contact dermatitis, urticaria and pruritus.

阳性率较高的过敏原依次为：硫酸镍、对苯二胺、芳香混合物、重铬酸钾、甲醛，斑贴阳性的病种有面部皮炎、湿疹、接触性皮炎、荨麻疹、瘙痒症。

In this cone, phosphoric acid medium, a violet-red compound was formed between chromotropic acid and formaldehyde which is photometrically determined at 570nm.

在浓磷酸介质中，甲醛与变色酸反应生成紫红色化合物，于570nm波长处作光度测定。

It is introduced the current research situation, mechanism and some existing questions about formaldehyde free finishing with such polycarboxylic acids as BTCA and CA to cotton fabrics.

介绍了BTCA和CA等多元羧酸用于棉织物无甲醛整理的研究现状、机理以及存在的一些问题，并对如何解决这些问题进行了探讨和分

It is introduced the current research situation, mechanism and some existing questions about formaldehyde-free finishing with such polycarboxylic acids as BTCA and CA to cotton fabrics.

介绍了BTCA和CA等多元羧酸用于棉织物无甲醛整理的研究现状、机理以及存在的一些问题，并对如何解决这些问题进行了探讨和分析。

Performance characteristics of self-prepared polycarboxylic acid formaldehyde free non-ironing finishing agent PC was investigated.

探讨自制聚羧酸型无甲醛免烫整理剂PC的应用性能。

A new method that formaldehyde in air is collected in canister, preconcentrated through 3-stage traps and analyzed by GC/MS is introduced in this paper. Characters such as detection limit, veracity, stability and region of linear response are investigated.

本文研究了采用SUMMA罐采样，三级冷阱预浓缩，GC/MS分析室内空气中甲醛的方法，并考察了该方法的检出下限、准确度、精密度、线性响应范围等方法特性。

Ultrafine copper powder s were prepared by direct reduction method with hydrazine hydrate and formaldehyde as composite reductive agent and glucose prereduction method,respectively.

分别采用水合肼-甲醛复合还原剂法以及葡萄糖预还原法制得了微米级的超细铜粉，并利用粉末X射线衍射以及扫描电镜对其进行了表征。

A strange and mysterious deep sea creature.

一种奇异、神秘的深海生物。

It's a yellow rectangle .

这是黄色的长方形。