Such is the case in pyrrole, thiophene, and furan.

吡咯, 噻酚和呋喃的情况就是这样.

辞典例句

It'shows that the key step is the synthesis of 4 - methyl - dihydro - furan - 2 , 3 - dione.

研究结果表明关键步骤为原料 4- 甲基 -2, 3- 呋喃二酮的合成.

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A novel furan resin was synthesized by polycondensation between furfuralcohol and furfural.

用糠醇和糠醛缩聚制备了新型呋喃树脂.

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Objective To discuss the prescription, preparation and determination of Furacilin Solution.

目的探讨呋喃西林溶液的处方和制备方法改进及其含量测定方法.

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HL series of shoe adhesives, since the hard Furan Resin, cashew oil.

HL系列鞋用胶粘剂, 自硬呋喃树脂, 腰果油等.

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Cu furaldehyde - diamine Schiff base complex was synthesized with the yield of 63.

合成了一种席夫碱金属络合物——呋喃甲醛乙二胺铜络合物,收率为63.

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AIM To improve the stability of furacilin solution especially in low temperature.

目的提高呋喃西林溶液(低温储藏期)的稳定性.

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Polyether diol mainly adopts polytetramethylene ether glycol ( PTMEG ).

聚醚二醇主要采用聚四氢呋喃醚二醇 ( PTMEG ).

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The photocycloaddition between 8 - methoxypsoralin ( 8 - MOP ) and cyclohexene has been studied previously.

我们曾研究了8-甲氧基呋喃并[3′,2′∶6,7]香豆素 ( 8-MOP ) 与环己烯的光环合加成反应.

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The casting is cast in furan sand mould.

采用呋喃树脂砂型铸造.

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An anticorrosion method of using modified glass concrete lining of furan resin for saturators is introduced.

介绍了一种对饱和器采用呋喃改性水玻璃混凝土衬里的防腐蚀方法.

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Objective To study the effect of 2 - Methylnaphtho [ 2,3 - b ] furan - 4,9 - dione ( FNQ 3 ) on Fas receptor expression and apoptosis in A 549 cells.

目的探讨2-甲基萘[2, 3-b ] 呋喃 -4,9-酮 ( FNQ3 ) 对A549细胞表面Fas受体表达和细胞凋亡的调节效应.

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A blending polyether type polyurethane elastomer was prepared by blending polyoxypropylene ether glycol with polyterahydrofuran glycol.

采用环氧丙烷聚醚与四氢呋喃聚醚共混,研制出共混聚醚型聚氨酯弹性体.

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Get together the important raw material that 4 hydrogen furan is manufacturing blackribbon and polyurethane material.

聚四氢呋喃是生产氨纶和聚氨酯材料的重要原料.介绍了聚四氢呋喃的新技术及国内外聚四氢蚨喃的发展情况.

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The catalysis of big pore strong acid resin for 1, 4 - butanediol dehydration to tetrahydrofuran is investigated.

考察了大孔强酸性树脂对1, 4 丁二醇 脱水制四氢呋喃的催化作用.

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