centered adj. 居中的;有圆心的
v. 集中;居中(center的过去式和过去分词形式)
ceder n. 转让人
cedrenen. [林] 雪松烯;柏木烯;番松烯
网络短语:
cedrene camphor 红桧脑;翻译;铅笔柏脑英语
Acetyl cedrene 甲基柏木酮;甲基柏木烯酮;乙酰基柏木烯
Cedrene epoxide 环氧柏木烷
Cedrene alpha 甲位柏木烯
英语例句库
The major components of cedar wood oil including some isomers α-cedrene, β-cedrene, thujopsene and so on,were separated by GC/MS and 19 compounds were identified. 本文利用GC/MS技术,对柏木油中的主要产物α—柏木烯、β—柏木烯、罗汉柏烯等同分异构体进行分离定性,共定出19个组份。
The normalized results indicate that the content of β cedrene in cedar wood oil is the highest, being about 33%. 峰面积归一化结果表明,柏木油中α雪松烯含量最高,约占总量的33%。
Cedrene, isolated from cedar oil, has been oxidized with suitable oxidant at 70℃ for half and three hours to give 63% cedrone. 从柏木油中分离得到柏木烯经氧化得到柏木酮,在氧化剂存在下,温度70℃反应3小时半产率可达63%。
Cedrene is a sesquiterpene found in the essential oil of cedar. The two isomers present in the oil are (−)-α-cedrene and (+)-β-cedrene, which differ in the position of a double bond.