马齿苋粗多糖的提取及清除羟自由基活性作用首席医学网2007年09月07日10:34:18Friday205中华临床医师杂志征稿颅脑解剖技术研修班肝病学科新进展研修班心律失常现代诊疗会议医学类核心期刊征稿老年疾病循证应用会议小儿心血管疾病会议第13届国际急诊学大会临床检验及设备展览会白内障人工晶状体会议全国疑难重症肝病大会四届长城国际男科论坛2010世界心脏病学大会泌尿外科学临床研修班股骨头坏死修复论坛作者:朱晓宦吴向阳仰榴青范群艳茆广华作者单位:江苏大学食品与生物工程学院;化学化工学院;药学院,江苏镇江212013加入收藏夹《航空航天医药》由中华人民共和国科学技术部、...中华现代临床护理学杂志征稿[白内障患者术前术后护理][银翘散方小议]·参松养心胶囊胺碘酮治心律失常疗效比较·外固定器结合植骨治尺桡骨骨折后骨不连·中西医结合治疗消化性溃疡53例疗效分析·子宫瘢痕部位穿透性植入胎盘致引产出血·溃疡性结肠炎外科治疗体会真菌性鼻窦炎护理杂志:诚信征稿、发表快[腰椎术后并发症预防护理][中医心理疗法]·写作技巧|医学论文结果部分的写作技巧·快讯|《中国医药导刊》杂志征稿函【摘要】目的:研究马齿苋粗多糖的水提法优化工艺和清除羟自由基活性作用。方法:采用苯酚-硫酸法测定多糖含量,以多糖提取率为考察指标,进行单因素实验,考察固液比、温度、时间、提取次数等因素对提取率的影响。在此基础上,进行正交试验,优化水提法工艺条件。采用水杨酸法考察马齿苋粗多糖清除羟自由基活性。结果:温度是影响粗多糖提取率的重要因素。水提法优化工艺条件为温度100℃、时间2h、固液比1∶15、提取次数4次,此条件下多糖提取率达94.26%,粗多糖得率为15.50%,多糖含量为22.60%。马齿苋粗多糖具有清除羟自由基能力,并且其清除能力与质量浓度有明显的量效关系,马齿苋粗多糖质量浓度为3.5mg/mL时清除率达50%,质量浓度为17.6mg/mL时清除率高达90%。结论:该优化工艺可用于马齿苋多糖的提取,高浓度马齿苋粗多糖具有较好的抗氧化活性。【关键词】马齿苋多糖提取工艺抗氧化羟自由基StudyonextractionandabilitytoscavengehydroxylradicalsforPolysaccharidesfromPortulacaoleraceaL.ZHUXiaohuan,WUXiangyang,YANGLiuqing,FANQunyan,MAOGuanghua(SchoolofFoodandBiologicalEngineering;SchoolofChemistryandChemicalEngineering;SchoolofPharmacy,JiangsuUniversity,ZhenjiangJiangsu,212013,China)[Abstract]Objective:TostudytheextractiontechnologyandantioxidantactivityofpolysaccharidesfromPortulacaoleraceaL.Methods:ThecontentofpolysaccharidesofPortulacaoleraceaL.wasdeterminedbythemethodofphenolsulphateacid.Onthebasisofsinglefactorstests,thefourfactorsincludingtemperature,solidliquidratio,timeandtheextractiontimesontheextractionrateofthepolysaccharideswerestudiedbyorthogonalexperimentaldesign.ThesalicylicacidmethodwasusedtoinspecttheabilitytoscavengehydroxylradicalsofthepolysaccharidesfromPortulacaoleraceaL.Results:Temperaturewasanimportantfactorfortheextractionrateofthepolysaccharides.Theoptimalextractiontechnologyconditionswerethatthetemperaturewas100℃,theextractiontimewas2h,thesolidliquidratiowas1∶15andtheextractiontimeswere4times.Theextractionrate,yieldandcontentofpolysaccharideswere94.26%,15.50%and22.60%,respectively.Thepolysaccharideshasgoodabilitytoscavengehydroxylradicals,andthescavengingabilityrelatedwiththeconcentrations.Thescavengingratewas50%attheconcentrationof3.5mg/mL,andthescavengingratewas90%attheconcentrationof17.6mg/mL.Conclusion:ThisextractiontechnologycouldbeusedfortheextractionofthepolysaccharidesfromPortulacaoleraceaL.Thepolysaccharideshasgoodantioxidantactivityatahighconcentration.[Keywords]PortulacaoleraceaL;polysaccharides;extractiontechnology;antioxidantacti...