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Stereoselective oxidative dimerization of the enolate of carboxylic acid derivatives is summarized focusing on the stereoselectivity of the process.

羧酸衍生物烯醇化二聚成键规律,重点立体选择性过程。

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In the oxidation reaction of cyclohexene, total selection of cyclohexene oxide, cyclohexanol, cyclohexenol and 2-cyclohexene-l-one reaches 98.5%, conversion reaches 33.2%.

化反应中,对烷、醇、烯醇烯酮选择性共达到98.5%,转化率达到33.2%。

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VOA Daily Standard 2019年3月合集

That's because it's supposed to not be. Vinal? Laser cut trim?

这是因为本来就没照历史上服饰去设计。聚乙纤维?激光修边?

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SciShow 合集

And the two chemicals in question here are androstadienone and estratetraenol.

这里讨论两种化学物质是雄甾二酮和雌四

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生活大爆炸(视频版) 第3季

I preserved in a one percent solution of polyvinyl acetal resin.

我把在纯净 聚乙缩醛树脂里

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VOA英语_娱乐

Vinal? Laser cut trim? That was not of the 1700s, so this is new technological, fresh fabric that she wanted to use.

聚乙纤维?激光修边?这不是在18世纪,所以这是她使用新技术造出新织物。

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Osmosis-微生物

Mosquitoes find their blood-meals using chemical compounds that we and other organisms give off, like carbon dioxide, ammonia, lactic acid, and octenol.

在寻找食物时,蚊子会利用我们和其他生物释放化合物,如二氧化碳、氨、乳酸和辛

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SciShow 合集

Pregnant women in the third trimester turn AND into a different chemical called estratetraenol or EST, which can be found in their urine.

妊娠晚期孕妇将 AND 转化为一种叫做雌四或 EST 不同化学物质,这种物质可以在她们尿液中找到。

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【健康生活】Wise Traditions Podcast

It is almost always in American society where we value productivity over pregnenolone, the mother hormone that is used to generate all of your adrenal hormones.

在美国社会中, 我们几乎总是更看重生产力而非孕酮,这种母体激素是生成所有肾上腺激素基础。

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