ketal 中文意思是什麼

ketal 解釋
酮縮醇
  1. Catalytic synthesis of butanone glycol ketal with phosphowolframic acid

    磷鎢酸催化合成丁酮乙二醇縮酮
  2. Four c - ch3, six aromatic carbons, six carbons of mycosamine were the characteristics of candicidin d, one ketal corresponding to mycosamine and four ketons indicated that no hemiketal formed between c - 15 and c - 19 in fr - g08b or candicidin d. however, such hemiketal was usually thought having been formed

    用這個探針，對鏈黴菌fr - 008的基因文庫進行雜交篩選，獲得了3個陽性克隆，經southern雜交分析，發現它們均含有6 . 4kb共同的陽性片斷。
  3. Catalytic synthesis of cyclohexanone glycol ketal by coal activated carbon modified by kmno4 as a catalyst

    高錳酸鉀改性煤基活性炭催化合成環己酮乙二醇縮酮
  4. The traditional catalyst used in acetal ( ketal ) synthetic reaction is strong inorganic acid. but there is some limits to its use because of its side reaction, strong erosion and liability to pollute the environment. molybdophosphoric acid is used as catalyst and three condensation products are prepared through the direct reaction of aldehydes ( ketones ) and ethylene. in addition, several elements of affecting the reaction is researched. it is proved that molybdophosphoric acid is very active as catalyst in less addition, the product yield is quite high and the quality of reuse is quite good

    縮醛（酮）合成反應的傳統催化劑為無機強酸，但由於副反應多、腐蝕性強和易污染環境等缺點，其使用受到限制.用磷鉬酸為催化劑，通過醛（酮）與乙二醇直接反應得到了三種縮合產物.對影響反應的諸因素進行研究，結果表明，用磷鉬酸作催化劑，用量小，活性高，產品收率較高，且重復使用性能較好
  5. Abstract : the traditional catalyst used in acetal ( ketal ) synthetic reaction is strong inorganic acid. but there is some limits to its use because of its side reaction, strong erosion and liability to pollute the environment. molybdophosphoric acid is used as catalyst and three condensation products are prepared through the direct reaction of aldehydes ( ketones ) and ethylene. in addition, several elements of affecting the reaction is researched. it is proved that molybdophosphoric acid is very active as catalyst in less addition, the product yield is quite high and the quality of reuse is quite good

    文摘:縮醛（酮）合成反應的傳統催化劑為無機強酸，但由於副反應多、腐蝕性強和易污染環境等缺點，其使用受到限制.用磷鉬酸為催化劑，通過醛（酮）與乙二醇直接反應得到了三種縮合產物.對影響反應的諸因素進行研究，結果表明，用磷鉬酸作催化劑，用量小，活性高，產品收率較高，且重復使用性能較好
  6. Catalytic synthesis of cyclohexanone ethylene ketal with h3pw12o40 pan

    磷鎢雜多酸摻雜聚苯胺催化合成環己酮乙二醇縮酮
  7. Catalytic synthesis of cyclohexanone ethylene ketal with h3pw6mo6o40 tio

    二氧化鈦負載磷鎢鉬雜多酸催化合成環己酮乙二醇縮酮
  8. Catalytic synthesis of ethyl acetoacetate ethylene glycol ketal by ammonium ferric sulfate

    硫酸鐵銨催化合成乙酰乙酸乙酯乙二醇縮酮
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