Duplication of bands in this region is also shown by trifluoropropyne and perfluoro 2 - butene.
三氟丙炔和全氟丁烯 -2 在這個(gè)區(qū)域也出現(xiàn)雙重譜帶.
辭典例句
Duplication of bands in this region also shown by trifluoropropyne and perfluoro 2 - butene.
三氟丙炔和全氟丁烯 -2 在這個(gè)區(qū)域也出現(xiàn)雙重譜帶.
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The mass fraction of n - butene in mixed C 4 from catalytic cracking after etherized was approximately 40 %.
醚化后的催化裂化混合C4中含有質(zhì)量分?jǐn)?shù)約為40%的正丁烯,是生產(chǎn)丙烯的優(yōu)質(zhì)原料.
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The copolymer of propylene with a small amount of butene was prepared by heterogeneous Ziegler ? Natta catalyst.
用負(fù)載型Ziegler- Nata 催化劑合成了丙烯同少量丁烯的共聚物,考察了單體進(jìn)料比對(duì)催化活性的影響,發(fā)現(xiàn)此體系存在“共單體效應(yīng)”.
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