The peel of Citrus changshan-huyou, coupled with wheat bran, could be utilized by Aspergillus niger P-6021 in slurry-state fermentation to produce pectinase with suitable enzyme composition for application in apple ju...The peel of Citrus changshan-huyou, coupled with wheat bran, could be utilized by Aspergillus niger P-6021 in slurry-state fermentation to produce pectinase with suitable enzyme composition for application in apple juice processing. The production of pectinase is improved by additional nitrogen source substances and mineral supplements. The ratio of carbon source substances to nitrogen source substances in the medium also has significant effect on the pectinase production by A. niger P-6021 in slurry-state fermentation. In the optimized medium composition, the maximal enzyme activity could reach 42 U.L^- 1 (polymethylgalacturonase), 6.7 U.L^- 1 (polymethygalacturatesterase), and 4.3 U.L^-1 (polymethylgalacturonate lyase), respectively, after 3 days at 180 r.min^- 1 and 30℃. The crude pectinase shows significant effect to improve the yield and clarification of apple juice. Keywords Aspergillus niger, slurry-state fermentation, pectinase, Citrus changshan-huyou, apple juice展开更多
目的建立常山胡柚果皮中3种主要成分的含量测定方法。方法采用RP-HPLC法测定含常山胡柚果皮中芸香柚皮苷、柚皮苷和新橙皮苷的含量,色谱柱为安捷伦ZORBAX Eclipse Plus C_(18)(4.6×250mm,5μm),流动相为甲醇(A)-0.1%乙酸-水溶液(B)...目的建立常山胡柚果皮中3种主要成分的含量测定方法。方法采用RP-HPLC法测定含常山胡柚果皮中芸香柚皮苷、柚皮苷和新橙皮苷的含量,色谱柱为安捷伦ZORBAX Eclipse Plus C_(18)(4.6×250mm,5μm),流动相为甲醇(A)-0.1%乙酸-水溶液(B),流速为1.0mL·min^(-1),于283nm波长下检测,柱温35℃,进样量5μL。结果常山胡柚果皮中芸香柚皮苷、柚皮苷和新橙皮苷在一定范围内线性良好(r>0.9992)。结论该法操作简便,灵敏度高,检测快速,适用于常山胡柚果皮中黄酮类成分的含量测定。展开更多
文摘The peel of Citrus changshan-huyou, coupled with wheat bran, could be utilized by Aspergillus niger P-6021 in slurry-state fermentation to produce pectinase with suitable enzyme composition for application in apple juice processing. The production of pectinase is improved by additional nitrogen source substances and mineral supplements. The ratio of carbon source substances to nitrogen source substances in the medium also has significant effect on the pectinase production by A. niger P-6021 in slurry-state fermentation. In the optimized medium composition, the maximal enzyme activity could reach 42 U.L^- 1 (polymethylgalacturonase), 6.7 U.L^- 1 (polymethygalacturatesterase), and 4.3 U.L^-1 (polymethylgalacturonate lyase), respectively, after 3 days at 180 r.min^- 1 and 30℃. The crude pectinase shows significant effect to improve the yield and clarification of apple juice. Keywords Aspergillus niger, slurry-state fermentation, pectinase, Citrus changshan-huyou, apple juice
文摘目的建立常山胡柚果皮中3种主要成分的含量测定方法。方法采用RP-HPLC法测定含常山胡柚果皮中芸香柚皮苷、柚皮苷和新橙皮苷的含量,色谱柱为安捷伦ZORBAX Eclipse Plus C_(18)(4.6×250mm,5μm),流动相为甲醇(A)-0.1%乙酸-水溶液(B),流速为1.0mL·min^(-1),于283nm波长下检测,柱温35℃,进样量5μL。结果常山胡柚果皮中芸香柚皮苷、柚皮苷和新橙皮苷在一定范围内线性良好(r>0.9992)。结论该法操作简便,灵敏度高,检测快速,适用于常山胡柚果皮中黄酮类成分的含量测定。