棗果中多酚類物質(zhì)的提取工藝及體外抗氧化作用研究.pdf

1、河北農(nóng)業(yè)大學(xué)碩士學(xué)位論文棗果中多酚類物質(zhì)的提取工藝及體外抗氧化作用研究姓名：郝會(huì)芳申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：植物學(xué)指導(dǎo)教師：董金皋20050613StudyonExtractingTechnologyandAntioxidantActivityinvitroofPolyphenolicCompoundsfromtheFruitofChineseJujnbc(ZiziphusjujubaMill)Specialty：BotanyMaster

2、candidate：HAOHuifangSupervisor：DONGJin—gaoAbstractTheextractingtechnologyofpolyphenoliccompoundsfromthedifferentpartsof“Jinsixiaozao”hasbeenstudiedBasedonthis，wedidsomeresearchonthecontentchangeofpolyphenoliccompoundsind

3、ifferentpansof3eultivarsofChinesejujube(zfz／phusjujubaMill)，“Jinsixiaozao”，“Zanhuangdazao”and“Fupingdazao”duringthefruitdevelopment，andcomparedthecontentofpolyphenoliccompoundsinskin，fleshandcorefromthethreecultivarsThen

4、theantioxidantactivityinvitroofthecrudepolyphenolicextractsfromthethreepansofthefruitatdifferentperiodswereassayedThemainresultsareasfollows：1TheoptimumconditionforextractingpolyphenoliccompoundsoftheskinandthefleshfromC

5、hinesejujubeweredeterminedtobe40％ethanolat60℃waterbathfor60minandsolidtOliquidratio1：30fortwiceAndtheoptimumconditionofthecorefromChinesejujubeweredeterminedtobe80％ofpH30ethanolat50℃waterbathfor12handsolidtoliquidratio1：

6、30fortwice2Duringthedevelopmentofthejujubefruit，thecontentofpolyphenoliccompoundsintheskinishighintheinitialpickedstagesandthewhiteripeperiodsof“Jinsixiaozao”but‘‘Zanhuangdazao”ishighintheprophaseofwhite—ripeperiodsTheco

7、ntentofpolyphenoliccompoundshasnoevidentchangefromtheskinof“Fupingdazao”Inthefleshandthecore，thoughtherearesomedifferencesamongthecontentofpolyphenoliccompoundsfromthethreecultivars，itishighintheinitialpickedstages，uptof

8、ruitripethecontentdecreasedslowly3Inthecycleofgrowingentirelytheaveragecontentofpolyphenoliccompoundsintheskinof‘“Jinsixiaozao”ismuchhigherthantheflesh，andthecoreisbetweentwopartsIn“Zanhuangdazao”and“Fupingdazao”，thecont

9、entofpolyphenoliccompoundsfromthecoreofthefruitsarethehighest，thenaretheskinandtheflesh，respectively4AgreatdifferenceexistedinthecontentofpolyphenoliccompoundsinthesamepartofdifferentChinesejujubecultivarThecontentofpoly