农产品加工2022年第12期摘要:针对富含优质植物蛋白的“药食两用”桑叶,探索一种有更高的蛋白提取率的工艺方法。以桑叶粉为原料,采用单因素筛选试验和正交设计方法,研究了超声波-纤维素酶联合辅助提取法提取桑叶蛋白质的工艺。获得桑叶蛋白质提取工艺的最佳参数为提取料液比1∶28(g∶mL)提取溶剂是质量分数为0.9%的NaCl溶液,150W的超声波处理30min,50℃水浴浸提50min,残渣中添加4.5%纤维素酶,在50℃下酶解55min,酸沉淀蛋白质的pH值为2.0;按以上参数进行桑叶蛋白质的提取,其提取率可达16.06%。该联合辅助提取法的桑叶蛋白质得率比单独使用其中一种辅助方法或其他的方法的提取率要高得多,至少高出56.99%;该提取工艺大大提高了提取率,可为同行及进一步产业化的研究提供参考。关键词:桑叶蛋白;超声波;纤维素酶;辅助提取;得率;工艺中图分类号:TS255.36文献标志码:Adoi:10.16693/j.cnki.1671-9646(X).2022.12.040StudyonCellulase-ultrasonicAssistedExtractionofProteinfromMulberryLeavesFUHaiqing1,2,ZHANGYing1(1.DietaryCultureandInheritanceResearchCcnter,JinshanCollege,FujianAgricultureandForestryUniversity,Fuzhou,FuJian350002,China;2.CollegeofFoodScience,FujianAgricultureandForestryUniversity,Fuzhou,Fujian350002,China)Abstract:Aimingatthemulberryleaveswhicharerichinhigh-qualityplantprotein,atechnologywithhigherextractionrateofproteinwasexplored.Usingmulberryleafpowderasrawmaterial,theextractiontechnologyofmulberryleafproteinbyul-trasonic-cellulaseassistedextractionwasstudiedbysinglefactorscreeningtestandorthogonaldesign.Theoptimumparametersofextractingmulberryleafproteinwereasfollows:theratioofextractingmaterialtoliquidwas1∶28(g∶mL),theextract-ingsolventwas0.9%NaClsolution,150Wultrasonictreatmentfor30min,50minwaterbathextractionin50℃,4.5%cellulaseaddedtotheprecipitateandenzymolysisat50℃for55min,thepHvalueofacidprecipitatedproteinwas2.0.Ac-cordingtotheseparameters,mulberryleafproteinextraction,theyieldcouldreach16.06%.Theyieldofmulberryleafpro-teinbythecombined-assistedextractionmethodwasmuchhigherthanthatbyoneoftheassistantmethodsaloneorothermethods,atleast56.99%higher.Theextraction...