ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

凍融循環(huán)對甲殼素凝聚態(tài)結(jié)構(gòu)和脫乙酰反應(yīng)的影響
CSTR:
作者:
作者單位:

作者簡介:

通訊作者:

中圖分類號:

基金項目:


Effects of Freezing-thawing Cyclic Treatment on Condensed State Structure and N-deacetylation of Chitin
Author:
Affiliation:

Fund Project:

  • 摘要
    • |
  • 圖/表
    • |
  • 訪問統(tǒng)計
    • |
  • 參考文獻(xiàn)
    • |
  • 相似文獻(xiàn)
    • |
  • 引證文獻(xiàn)
    • |
  • 資源附件
    • |
  • 文章評論
    摘要:

    甲殼素和質(zhì)量分?jǐn)?shù)為40%的濃NaOH溶液的混合物在-18℃和40℃條件下反復(fù)進(jìn)行凍融處理,，結(jié)果表明慢速冷凍加低溫解凍的凍融循環(huán)處理過程中，冰晶的反復(fù)形成和重結(jié)晶能夠破壞甲殼素凝聚態(tài)特別是晶態(tài)結(jié)構(gòu),。經(jīng)過3次凍融循環(huán)處理,，可使甲殼素在NaOH溶液中完全溶解，獲得甲殼素最終質(zhì)量分?jǐn)?shù)為4%,，NaOH最終質(zhì)量分?jǐn)?shù)約為10%的均相溶液,，為用均相脫乙酰法制備半脫乙酰水溶性甲殼素提供前提。

    Abstract:

    The effects of freezing-thawing cyclic (FTC) treatment on the condensed state structure and N-deacetylation of chitin were investigated. The mixture of chitin and concentrated NaOH solutions (40%) was frozen at -18℃ and thawed at 40℃, repeatedly. Slowly freezing and low temperature thawing cycle process can thoroughly destruct the condensed state structure, especially the crystalline state structure, as a result of the ice crystals’ repeatedly formed and recrystallizated. Furthermore, via three times FTC treatment at -18℃, chitin was completely dissolved in NaOH aqueous solution and the homogeneous solution with a chitin concentration about 4% and a final NaOH concentration of approximately 10% formed, which is likely applied to prepare partial N-deacetylated water-soluble-chitin.

    參考文獻(xiàn)
    相似文獻(xiàn)
    引證文獻(xiàn)
引用本文

劉廷國,陳艷,李斌,陳建,黃勁松,盛敏剛.凍融循環(huán)對甲殼素凝聚態(tài)結(jié)構(gòu)和脫乙酰反應(yīng)的影響[J].農(nóng)業(yè)機(jī)械學(xué)報,2009,40(10):140-145.Effects of Freezing-thawing Cyclic Treatment on Condensed State Structure and N-deacetylation of Chitin[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(10):140-145.

復(fù)制
分享
文章指標(biāo)
  • 點擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:
  • 最后修改日期:
  • 錄用日期:
  • 在線發(fā)布日期:
  • 出版日期:
文章二維碼