查询词典 formaldehyde

Leading products are urea, ammonium bicarbonate, methanol, hydrogen peroxide, melamine, isopropylamine, formaldehyde, urotropine, and so on. 2005 sales revenue will reach 1 billion yuan, and profits and taxes will reach 82 million yuan.

主导产品有尿素、碳酸氢铵、甲醇、双氧水、三聚氰胺、异丙胺、甲醛、乌洛托品等。2005年销售收入将达到10亿元，实现利税将达到8200万元。

Results:There was no significant difference in mensuration between microwave disgestion-acetylacetone-formaldehyde spectrophotometry method and international standard Kjeldahl determination.

结果：微波消解-乙酰丙酮甲醛分光光度法与国标凯氏定氮法相比测定结果差异无显著性，该方法线性范围在5~100μg/10 m l，相关系数r=0.9997，检出限为0.546μg/10 m l，相对标准偏差为1.29%~2.21%，加标回收率

On curing, the -NCH〓OH groups of PNMA film would condense with each other to form a network of PNMA in which the PA molecular long chains were be"tightened"in bundles, or be confined in the meshes of the networks. 2. During the developing process of the low-temperature curable, non-formaldehyde PA latices, the monomers were chosen based on the organic/inorganic ratios, and the co-polymerization reactivity ratios. The effects of crosslinking monomer A and B were also compared.

从物质的有机性/无机性值，以及多元单体发生共聚的条件出发，通过比较交联单体A与B的性能，发现采用交联单体A的胶乳的性能良好，确定了一个由软、硬及交联单体A等多种单体组成的混合体系在阴/非离子组成的复合乳化体系中进行乳液聚合制备所要求的低温无甲醛PA胶乳的配方。

In my search for a nail polish with less toxins I came across Loreal Jet Set and Loreal Steel Color which do not contain formaldehyde, toluene or dibutyl phthalate.

我对含少量毒素的指甲油做了一项调查，在调查中我偶然发现了欧莱雅速丽指甲油和欧莱雅时尚珍藏指甲油，它们不含甲醛，毒素或邻苯二甲酸二丁酯。

A series of maleopimaric acid polyester amino resins were made from maleo￣pimaric acid polyesters crosslinked by etherified melamine formaldehyde resins.

以马来海松酸和线性小分子二醇为原料，合成马来海松酸聚酯多元醇，再用氨基树脂交联，制备马来海松酸聚酯氨基树脂。

METHODS: Anatomical and kinetic observations were performed at 14 metacarpophalangeal joints of adult cadaver samples, which were preserved and fixed with formaldehyde.

目的： 探讨籽骨在拇长屈肌腱狭窄性腱鞘炎形成中的解剖学基础。

Rats in the experimental group received conventional fixation, and then decalcified with modified decalcifying fluid [10 mL of methanoic acid, 8 mL of concentrated hydrochloric acid (1.19 relative density, 3 g of aluminum chloride, 20 mL of formaldehyde (0.4 volume fraction), 3 mL of glacial acetic acid, adding to 200 mL with saline solution], dehydrated, transparentized with chloroform, and then embedded for a long time, dyed, mounted and made into tissue sections.

实验组经过常规固定，而后应用改良脱钙液（甲酸10 mL、浓盐酸(相对密度1.19)8 mL、氯化铝3 g、体积分数为0.4的甲醛20 mL、冰乙酸3 mL，加生理盐水至总体积200 mL）脱钙、脱水、氯仿透明、包埋时间延长、染色、封固和切片；对照组进行常规固定、脱钙、脱水、透明、包埋、染色、封固和切片。

The ozonolysis of isoprene has a significant contribution to atmospheric carbonyls, especially to formaldehyde and methylglyoxal.

异戊二烯臭氧氧化反应对大气羰基化合物特别是甲醛和丙酮醛具有重要贡献。

Secondly, the silver based catalysts modified by phosphorus, zirconium, zinc, potassium and so on using molecular sieve as carrier, which were produced by ion-exchange method, had also good catalytic performance for 1,2-propane glycol oxidation to methylglyoxal. The conversion of 1,2-propane glycol and the selectivity of methylglyoxal were both high, and the impurity such as formaldehyde and acetaldehyde in the product is little. At the condition of the temperature 300 ℃, the molar ratio of oxygen to 1,2-propane glycol 1.7:1, the space velocity 6000h~(-1), and the concentration of 1,2-propane glycol 70wt%, the conversion of 1,2-propane glycol is 90% and the selectivity of methylglyoxal is 45% on the Ag-P catalyst.

其次对采用离子交换法制备的负载在分子筛上的银系催化剂进行了研究，发现此催化剂在助催化剂磷、锆、锌、钾等的作用下对丙二醇的低温氧化脱氢具有很高的活性，可以得到较好的丙酮醛的收率，并且产物中的甲醛、乙醛副产物的量比较低；经过对Ag-P催化剂上反应条件的考察，发现当温度为300℃、氧醇比1.7：1、空速6000h~(-1)、丙二醇浓度为70wt%时，丙二醇的转化率为90%，丙酮醛的选择性为45%。

The results indicated isoprene was soon consumed under the condition of excess ozone. During the reaction, the major carbonyl products formed were methyl vinyl ketone, methacrolein, methylglyoxal, and formaldehyde. Formic acid, CO and CO2 were also among the products.

在反应温度(294±2)K，压力为1.01×10^5Pa空气，O3过量的条件下，异戊二烯很快反应完全，反应中生成的羰基产物主要包括甲基丙烯醛、甲基乙烯基酮、丙酮醛和甲醛；产物中还包括甲酸、一氧化碳和二氧化碳。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。