• 溶剂,取代磺酸拆分诱导结晶法,成盐、拆分、水解过程,将DL-羟基苯甘氨酸拆分成D-对羟基苯甘氨酸。

    The resolution of DL p hydroxyphenylglycine into its D and L isomers was studied by using aromatic sulfonic acid as resolving agent and water as solvent.

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  • IR光谱分析同样反映沥青催化氧化后分子结构减少环上减少,整个环的缩合程度增加

    Meanwhile IR analysis showed that side chain between molecule and hydrogen of aromatic ring were decreased, condensed degree was increased in catalytic oxidation.

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  • 三氯氧磷作用下,由氧基乙酸氨基硫脲脱水环合,微波辐射快速合成一系列2氨基5氧亚甲基1,3,4二唑类化合物。

    The reaction of aryloxy acetic acid with thiosemicarbazide in the presence of dehydrating agent, POCl_3, affords a series of 2amino5aryloxymethyl1,3,4thiadiazoles under microwave irradiation (MWI).

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  • 检讨,我们不能接受转运和分批运输。依据下面内容修改信用证, 汤大胆照片。

    Pls instruct your bank to make the necessary amendments of the L/C .

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  • 检讨,我们不能接受转运和分批运输。依据下面内容修改信用证, 汤大胆照片。

    Pls instruct your bank to make the necessary amendments of the L/C .

    youdao

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