芳叉 的英文怎麼說
中文拼音 [fāngchā]
芳叉
英文
arylidene-
A facile method for the preparation of 10 - arylmethylene anthrone is reported. when anthrone react with aryl aldehyde in the presence of pyridine by using xylene as the solvent, besides 10 - arylmethylene anthrone derivatives we found other oxygenated anthrone which have not been reported. physical methods shows that the oxygenated anthrone is anthraquinone, and the anthraquinone cannot be removed from the condensed products by recrystallization with solvents. an effective method of getting ride of anthraquinone is sublimation by heating
以蒽酮和芳香醛為原料，二甲苯為溶劑，吡啶催化法制取10 -芳香基甲叉基蒽酮.發現其生成物中除含有目標化合物10 -芳香基甲叉基蒽酮外，還含有部分文獻中沒有報道的蒽酮氧化物，經物理方法確定其為蒽醌.該化合物不能用溶劑重結晶的方法將其從縮合產物中除去，有效的分離方法是升華Attention : according to eu - law allergens have to be declared not only if your product contains allergenic ingredients according to your recipe but also if your product might contain allergens by possible cross contamination, e. g. incorrectly cleaned machines and tools or by other product lines in the same factory or if a single component of a compound ingredient ( e. g. : aroma ) is allergenic
注意：根據歐洲法律，過敏素申明不僅必須說明依照處方你們的產品中是否包含過敏性配料，同時還需說明你們的產品是否可能因交叉污染而含有過敏素，如使用了未正確清潔的機器和工具、被同一間廠房內其它產品生產線污染、或一種復合配料（如芳香劑）中的某個單一成分為過敏性成分。
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