查询词典 formaldehyde

And in this resin most of the phenol was free, that was to say it didn't co-condense with UF species, MF species, and even formaldehyde. So the method to add phenol to MUF resin in the end of the preparation of MUF resin couldn't guarantee the co-condensation between MUF resin and phenol to come forth.

另外，几乎所有的苯酚在树脂中也都处于游离状态，它既未与UF树脂或MF树脂发生反应，也未与游离甲醛发生反应，因此，在树脂合成后期向树脂中加入苯酚的方法不能保证共缩聚反应的发生。

Two kinds of MUF resin were chosen, which are sequential-type melamine-urea-formaldehyde MUF resin formulations where the sequence of addition of chemicals followed well-defined species reactivity principles.

文中MUF树脂选用了两种典型树脂，分别是连续型MUF1树脂和非连续型MUF2树脂。

Results Significanly negative correlation was observed between the values of natural logarithm of formaldehyde concentration and time ...

结果在一定时间内测定甲醛浓度的对数和时间变量之间求得的r值在-0.9950～-0.9997之间，二个变量之间相关性显著，为负相关。

Objective To detect the poliovirus inactivation effect of the formaldehyde ultrasonic nebulization sterilizer.

目的检测甲醛超声雾化消毒器对脊髓灰质炎病毒灭活效果。

Objective To study the effects of formaldehyde inhalation on spatial learning abilities and hippocampal neurotransmitters levels of mice, and to explore the neurotoxic mechanism.

目的 探讨甲醛对小鼠学习记忆的影响，并通过测定单胺类神经递质及氨基酸类神经递质含量的变化初步探讨甲醛对学习记忆影响的机制。

Most primary use of it is raw material for melamine formaldehyde resin, which is high hardness, noninflammable, resisting water, heat, aging, electric arc and chemical corrosion, with good insulation performance, gloss and mechanical strength, widely used in wood, plastic, coating, papermaking, textile, leather, electrical and pharmaceutical industries.

最主要的用途是作为生产三聚氰胺甲醛树脂的原料，该树脂硬度较高，不易燃，耐水、耐热、耐老化、耐电弧、耐化学腐蚀，有良好的绝缘性能、光泽度和机械强度，广泛运用于木材、塑料、涂料、造纸、纺织、皮革、电气、医药等行业。

Result of study indicate that high performance natural adhesive have no dissociate formaldehyde release, it is nonpoisonous and environmental protection.

研究结果表明，高性能天然胶粘剂无游离甲醛释放，其胶合产品无毒环保。

By the two-steps synthetic process, the new type resin for the need of developing printing ink could be prepared with rosin, nonyl phenol and formaldehyde.

采用二步法合成工艺，以壬基酚和松香及甲醛为主要原料，合成了松香改性酚醛树脂。

The as-prepared NPG showed high catalytic activity towards the oxidation of formic acid and formaldehyde.

研究发现NPG对甲酸、甲醛的氧化具有很高的电催化活性。

The condensation reaction,in which the yield of intermediate product after refining process was more than 90%,used iso-butylaldehyde and formaldehyde as materials,Et 3N as catalyst.The hydrogenation,in which the conversion of hydroxypivaldehyde and selectivity of NPG were respectively 99% and 95%,used Cu-ZnO as catalyst,and ethanol as solute,meanwhile in the hydrogenation,the impurity in material could also ...

缩合反应采用异丁醛和甲醛为原料，三乙胺为催化剂，在 60℃左右反应，缩合产物经减压蒸馏和结晶、干燥，得到收率为 90 %以上的中间体羟基戊醛；加氢反应采用自制的Cu -ZnO催化剂，乙醇为溶剂，在 15 0℃将HPA加氢生成新戊二醇，HPA转化率为 99%，新戊二醇收率在 95 %以上，而且HPA缩合反应的副产物在加氢反应中也转化为新戊二醇。

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。