一氮化物

A colorless crystalline compound,C4H10N2,used as a hardener for epoxy resins,an antihistamine,and an anthelmintic.

对二氮已环一种无色晶体化合物，C4H10N2，用作环氧树脂的硬化物、抗组胺剂和驱虫剂

A colorless crystalline compound, C4H10N2, used as a hardener for epoxy resins, an antihistamine, and an anthelmintic.

哌嗪，对二氮已环一种无色晶体化合物，c4h10n2，用作环氧树脂的硬化物、抗组胺剂和驱虫剂

Summary Amounts of air pollutants, such as chlorofluorocarbons, nitrous oxides, methyl bromide and methane, were produced by industrial an...

人类活动和工业生产产生了很多污染物，诸如氯氟烃、氮氧化物、甲基溴化物和甲烷等，其中一氧化氮也是污染物之一。

The invention relates to a metal plug-in layer in film of GaN and its preparation method by hydrogenide vapour phase denotation, which is characterizes in that it adopts structure of wolfram plug-in layer.

本发明涉及一种氢化物气相外延氮化镓膜中的金属插入层及制备方法，其特征在于采用了金属钨插入层的结构。

Fourthly, The preparation of 1 -triazolyl-2-isoxazolinyl substituted-ethenes was developed through an one-pot 1, 3-dipolar cycloaddition of NaN_3 and RI,α-alkylation reaction of substituted allyl bromides and 1, 3-dipolar cycloaddition of nitrile oxidesbased on polystyrene-supported propargyl selenide.

四、从聚苯乙烯负载的炔丙基硒醚出发，通过与叠氮化钠和碘化物的一锅法1，3-偶极环加成反应、取代烯丙基溴的α-烷基化反应和腈氧化物的1，3-偶极环加成反应固相合成了1—三唑—2—异噁唑啉取代的-乙烯。

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。