马铃薯抗性淀粉消化前后的益生作用与结构变化_谢涛_张淑远_王美桂

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1、网络出版时间：2014-03-2815:13网络出版地址：http://www.cnki.net/kcms/detail/11.2206.TS.20140328.1513.009.html2014-03-26马铃薯抗性淀粉消化前后的益生作用与结构变化谢涛，张淑远，王美桂（湖南工程学院化学化工学院，湘潭411104）摘要：制备与纯化得到了马铃薯抗性淀粉及消化抗性淀粉，研究了它们的益生作用与结构变化。实验结果表明：马铃薯抗性淀粉及消化抗性淀粉对双歧杆菌和乳酸杆菌都有显著的增殖作用，对大肠杆菌和产气荚

2、膜梭菌有强抑制作用，对粪肠球菌、梭状杆菌、兼性细菌没有影响；它们的发酵液总酸度增大，说明它们能被肠道益生菌发酵利用；马铃薯抗性淀粉经消化处理后比表面积增加，经发酵后比表面积更大。马铃薯抗性淀粉的平均聚合度较之原淀粉显著变小，马铃薯抗性淀粉或消化抗性淀粉发酵后的平均聚合度降低；马铃薯抗性淀粉经消化前后的晶型均为B型，其抗性淀粉及消化抗性淀粉发酵后的晶型都转变为A型，微晶度、亚微晶度及总结晶度较之发酵前都明显降低。关键词：马铃薯；抗性淀粉；益生作用；结构变化中图分类号：TS235.2文献标识码：A文

3、章编号：ProbioticfunctionsandstructuralchangesofpotatoresistantstarchbeforeandafterdigestionXIETao,ZHANGSu-ruan,WANGMei-gui(CollegeofChemicalEngineering,HunanInstituteofEngineering,Xiangtan411104)Abstract：Potatoresistantstarchesbeforeandafterinvitrodiges

4、tionweremadeandpurified.Theirproboticfunctionsandstructuralchangeswereintensivelystudied.Theresultsdemonstratedthattheseresistantstarchesbeforeandafterdigestionhavegoodproliferativeeffectonbifidobacteriumandlactobacillus,haveinhibitoryimpactonEscheri

5、chiacoliandClostridiumperfringens,andhavenoinfluenceonEnterococcusfaecalis,Corynebacteriumfusifomeandfacultativebacterial.Theincreasingtotalaciditiesoffermentationliquidsdemonstratedthattheseresistantstarchesbeforeandafterdigestioncanbeusedbyintestin

6、alprobiotics.Comparedwithresistantstarch,digestedresistantstarcheshaveincreasingspecificsurfaceareas,andhavemoregreaterspecificsurfaceareasafterinvitroanaerobicfermentation.Incomparisonwithnativestarch,averagedegreeofpolymerizationofresistantstarchde

7、creasesignificantly.Afterfermentation,averagedegreeofpolymerizationsofresistantstarchesbeforeandafterdigestiondecrease.CrystaltypesofresistantstarchesbeforeandafterinvitrodigestionaretypeB.Afterfermentation,crystaltypesofresistantstarchesbeforeandaft

8、erdigestionallbecometypeA,thedegreesofmicrocrystalline,submicrocrystalandtotalcrystallinityobviouslydecreasedcomparedwithbeforefermentation.Keywords：Potato;resistantstarch;proboticfunction;structuralchange抗性淀粉作为一种新型的益生元制剂，具有来源广泛、制备工艺简单、口感好等优点，在国外[1-4