Synthesis of ethyl iso nicotinate using BTEAC (benzyl triethyl ammonium chloride) as phase transfer catalyst was studied.
以BTEAC(苄基三基氯化铵)为相转移催化了烟。
Methyl 1 phenyl Propanone was synthesized with benzene and iso butyryl chloride by using anhydrous aluminium trichloride as catalyst.
由苯与丁酰氯在无水三氯化铝作催化的条件下制备苯基丙基酮。
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ISO standards are not free, and they're not even cheap.
ISO 标免费的, 而且价格也便宜。
And once again, I go online, and I teach myself about ISO and aperture on YouTube.
我再上网,在 YouTube 上自学 ISO 和光圈。
" It is inappropriate to report (about Pao Cai winning the ISO) without differentiating Kimchi from Pao Cai of China's Sichuan, " the statement said.
" 在将韩国与四区分开的情况下报道获得国际标化组织认证恰当的。"
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