Degradation of chitosan and starch by 360-kHz ultrasound
- 上传人: 上海科学仪器有限公司 |大小:289.61KB|浏览:465次|时间:2018-08-31
- 文档简介
- 您可能感兴趣的资料
-
Degradation of chitosan and starch by 360-kHz ultras
-
MwA & chitosan测量应用案例-10
-
MwA & chitosan测量应用案例-5
-
MwA & chitosan测量应用案例-4
-
MwA & chitosan测量应用案例-3
-
MwA & chitosan测量应用案例-2
-
Control领 of Degradation Effects in Radiation Proc
-
Examining the Fusion and Degradation
-
Degradation tests A new test procedure to examine p
-
MwA & chitosan测量应用案例-9
reductionofmolecularweightofbothpolysaccharides.IthasbeendemonstratedthatattheappliedultrasoundfrequencydegradationiscausedbothbyOHradicalsandmechanochemicaleffects.InAr-saturated2!10K2moldmK3chitosansolutions,pH3,atanultrasounddoserateof170WkgK1,theaveragesonochemicalchainscissionyieldinthesonicationtimerangeof090minisca.8!10K11molJK1.Thisyieldhasbeenshowntodependonpolymerconcentration,ultrasoundpowerandgasusedtosaturatethesolution.Scissionisaccompaniedbysidereactionsleadingtotheformationofcarbonylgroups.Ultrasound-inducedchainscissionofstarchproceedswithloweryield,oneofthereasonsbeingprobablythedifferentchainconformationwhencomparedwithrod-likechitosanmacromolecules.q2004ElsevierLtd.Allrightsreserved.
标签: