查询词典 formaldehyde

Methods: Phloroglucinol react with formaldehyde to come into being a yellowish-red dyestuff, the color of dyestuff changes with concentration of formaldehyde.

间苯三酚在强碱性条件下，与甲醛反应，生成橙红色物质，随甲醛浓度增加颜色加深。

The possibility of the synthetic technology of urea-formaldehyde resins with low formaldehyde emission under weak acidity condition was discussed.

探讨了在弱酸性条件下合成低甲醛释放量的脲醛树脂工艺的可能性。

Effects of reaction condition in urea-formaldehyde resin production,especially during the acid stage,on the formaldehyde emission were discussed.

讨论了脲醛树脂的合成过程，特别是酸性缩聚阶段的工艺条件对树脂甲醛释放量的影响。

Effect of bonding strength and formaldehyde emission of plywood with low molar ratio urea-formaldehyde adhesive resin modified with p-aminophenol is investigated.

研究了对氨基酚(p-aminophenol)对低物质量比脲醛树脂的胶合强度和甲醛释放量的影响。

The invention uses the industry byproduct in production of sulfonation-process phenol or the byproduct (Na2SO3 content is 60-85percent) in production of p-cresol and sodium hydrosulfite to produce the aliphatic high range water reducer and takes acetone, formaldehyde, industry byproduct, sulphite or sodium pyrosulfite as raw materials and then sulfonation and condensation reactions are carried out in aqueous medium, the reactant weight ratio is acetone: formaldehyde: sulphite plus industry byproduct: water is equal to 1:2.5-4.5:1.5-2.6:4.0-6.0, the mass concentration of the condensation compound obtained is 30-42 percent, and the viscosity thereof is 20-100m.

本发明利用磺化法苯酚生产中的工业副产品，或者对甲酚和保险粉生产过程中副产品(Na 2 SO 3 含量在60～85％)生产脂肪族高效减水剂，采用丙酮、甲醛、工业副产物、亚硫酸盐和或焦亚硫酸钠作为原材料，在水介质中进行磺化和缩合反应，反应物的质量比为丙酮∶甲醛∶亚硫酸盐副产品∶水＝1∶2.5～4.5∶1.5～2.6∶4.0～6.0，所得到的缩合物的质量浓度为30～42％，粘度为20～100m。

Urban families decorative quality inspection station specialists, and some households in the laying of composite or wood floors to the floor, where the possible use of formaldehyde Daxinban do liner; Some of the medium-density plate so bad quality furniture; Some tenants also purchased a sofa, under the cushions from plastic foam Nien%; Some estimates are shaving board affixed to the chest or face other furniture formaldehyde standard Draw the disaster.

市家庭装饰质检站的专家介绍，有的住户在铺设复合强化地板或木地板时，可能采用了甲醛超标的大芯板做衬垫；有的用质量不好的中密度板材做家具；也有的住户购买的沙发出了问题，其座垫下的泡沫塑料是由胶粘成的；还有的估计是刨花板贴面的柜子或其它家具甲醛超标惹的祸等。

For example imitation board and its products with the European edition of formaldehyde "shaving board," the standard indicators consistent; Solvents, benzene-based paint wooden limited value and the "Community eco-labelling products -- Seqi and varnishes ecological commands" the same; Carpet, carpet pad and carpet products used Jiaonianji divided into A, B levels, a level of environmental protection - which the limited value with the United States under the carpet Association standards volatile organic compounds, formaldehyde, and other indicators of the same; the conditions of application of radioactive materials into civil construction and industrial materials of construction, civil construction is divided into one category and class civil construction, and then, in accordance with A, B, C classification.

比如人造板及其制品中的甲醛限量与欧洲&刨花板&等有关标准的指标相一致；溶剂型木器涂料中苯的限量值与&欧共体生态标志产品―――色漆和清漆生态指令&相同；地毯、地毯衬垫及地毯用胶黏剂产品分为A、B两级，其中A级环保型的限量值与美国地毯协会标准规定的挥发性有机化合物、甲醛等指标相同；建筑材料放射性把材料适用条件分为民用建筑和工业建筑，民用建筑又分为一类和二类民用建筑，然后按照A、B、C分类。

Experiment finds that melamine formaldehyde resin could reduce the ramie fiber's water absorption.But it usually has low storage stability.For improving the storage stability,the property of Melamine formaldehyde resin is modified by polyvinyl alcohol.

实验发现，三聚氰胺甲醛树脂可降低苎麻纤维的吸水率，但三聚氰胺甲醛树脂存放稳定性差，加入聚乙烯醇进行改性可显著改善三聚氰胺甲醛树脂的贮存稳定性。

Objective: To test residual formaldehyde in water-soaked foodstuffs on sale so as to find situation of use of formaldehyde.

目的：对水发水产品进行甲醛残留检测，了解市售水发水产品中甲醛含量。

Melamine formaldehyde moulding material was prepared by melamine formaldehyde resin and cellulose.

以三聚氰胺甲醛树脂为胶粘剂，纤维素为增强材料，制得三聚氰胺甲醛模塑料。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。