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Published in last 1 year |  In last 2 years |  In last 3 years |  All Please wait a minute... For Selected: Download Citations EndNote Reference Manager ProCite BibTeX RefWorks Toggle Thumbnails Select Study on extracting and antioxidant activity of total flavonoids from Evodia rutaecarpa ZHAO Nan, JING Yun-rong, HE Ting-ting, CHAI Jun-hong, WAN Chun-lei, ZHANG Lei HUBEI AGRICULTURAL SCIENCES    2020, 59 (3): 118-121.   DOI: 10.14088/j.cnki.issn0439-8114.2020.03.025 Abstract （382）      PDF （1532KB）（188）       Knowledge map    Save Taking Evodia rutaecarpa as raw materials, and total flavonoids content as the index, on the basis of single factor experiment, the optimization of extraction of flavonoids from Evodia rutaecarpa was investigated by orthogonal experimental design. The optimum conditions were ethanol concentration at 70%, solid-liquid ration at 1∶50, extraction time at 40min and extraction temperature at 65℃. The results showed that the extracting rate of total flavonoids reached 8.82%. The antioxidant activity of flavonoids from Evodia rutaecarpa had good ability to scavenge DPPH· free radical. Reference | Related Articles | Metrics Select Experiment on fermentation of biogas by two kinds of cassava alcohol wastes PHIMPHANH Vilaiya, WANG Chen, MA Wen-qin, ZHENG Xin, JIA Zheng-yan, XIA Ying-chun, JI Jun-lin, YIN Fang, ZHANG Wu-di HUBEI AGRICULTURAL SCIENCES    2020, 59 (3): 122-125.   DOI: 10.14088/j.cnki.issn0439-8114.2020.03.026 Abstract （426）      PDF （1565KB）（259）       Knowledge map    Save It uses the dried distiller's grains remaining after the fermentation of Chinese cassava and Lao cassava to produce alcohol. The batch biogas fermentation experiment is carried out under the condition of（35±1） ℃. The concentration is 4%. The experimental results show that the average daily gas production of Chinese cassava distiller's grains and Lao cassava distiller’s grains is 158.2,149.3 mL/d, respectively. The TS gas production rate and VS gas production rate of Chinese cassava distillers’ grains were 659,867 mL/g, respectively. The TS gas production rate and VS gas production rate of Laos cassava distiller’s grains are 799,1 080 mL/g, respectively. The average methane content in biogas was 50% and 51%, respectively. Reference | Related Articles | Metrics