With two-year-old Amorpha fruticosa L. cv. Jinye and A. fruticosa as the research objects, the relative conductivity, MDA content, soluble sugar content, solu- ble protein content and proline content in leaf were dete...With two-year-old Amorpha fruticosa L. cv. Jinye and A. fruticosa as the research objects, the relative conductivity, MDA content, soluble sugar content, solu- ble protein content and proline content in leaf were determined during natural drop in temperature, and the SOD, POD and COD activity in leaf were determined under artificial low temperature to explore the adaptability of A. fruticosa L. cv. Jinye to low temperature. The results showed that with the decrease in natural temperature, the content of MDA in A. fruticosa L. cv. Jinye was lower than that in the control, and the contents of osmotic adjustment substances （soluble sugar, soluble protein and proline） increased, indicating that A. fruticosa L. cv. Jinye had a stronger toler- ance to low temperature compared with A. fruticosa. The activity of SOD, POD and CAT in A. fruticosa L. cv. Jinye increased continuously, higher than that in the con- trol, indicating that the resisting ability of A. fruticosa L. cv. Jinye against low tem- perature was superior to that of the control. There was no significant difference in relative conductivity between A. fruticosa L. cv. Jinye and A. fruticosa.展开更多
In this paper,the ultrasonic-assisted extraction process of flavonoid compounds from leaves of Amorpha fruticosa is optimized.In single factor experiments,solid/liquid ratios,ultrasonic power,ethanol concentrations an...In this paper,the ultrasonic-assisted extraction process of flavonoid compounds from leaves of Amorpha fruticosa is optimized.In single factor experiments,solid/liquid ratios,ultrasonic power,ethanol concentrations and extraction cycles were experimental factors.Box–Behnken central composite design and RSM analyzed the effects of the four factors on the yield of total flavonoids.The optimal extraction parameters were solid/liquid ratio 1:50 g/mL,ultrasonic power 316 W,ethanol concentration 50%,4 extraction cycles.In the optimized condition,the estimated value of the regression model was 66.6456 mg/g while the measured value was 66.4329 mg/g.展开更多
[Objectives]To study the effects of Fruticosa potentilla L.on the expression of key enzymes and hormones related to glucose and lipid metabolism in T2DM rats.[Methods]The ethyl acetate fraction of 95%methanol extract ...[Objectives]To study the effects of Fruticosa potentilla L.on the expression of key enzymes and hormones related to glucose and lipid metabolism in T2DM rats.[Methods]The ethyl acetate fraction of 95%methanol extract of F.potentilla(MEE)was administered orally to the T2DM rats,and the level of glucose and expression of insulin,resistin,leptin,glucokinase(GK)and glucose-6-phosphatase(G-6-Pase)in the rats were measured and detected.[Results]In the T2DM rats administered with MEE,the postprandial blood glucose level decreased,the expression levels of resistin,leptin and G-6-Pase were down-regulated,and the expression levels of insulin and GK were up-regulated(P<0.05,P<0.01).[Conclusions]F.potentilla can reduce effectively postprandial blood glucose level,regulate the expression of a variety of enzymes and hormones related to glucose and lipid metabolism and recover partially the insulin level in T2DM rats to achieve resistance to T2DM.展开更多
本研究采用AB-8大孔吸附树脂、半制备高效液相色谱对金露梅枝叶中槲皮素-7-O-β-D-葡糖苷酸提取分离,并通过13 C NMR鉴定其化学结构,最后采用以4-硝基酚-α-D-吡喃葡萄糖苷(pNPG)为底物的酶抑制剂筛选模型检测其对α-葡萄糖苷酶的抑制...本研究采用AB-8大孔吸附树脂、半制备高效液相色谱对金露梅枝叶中槲皮素-7-O-β-D-葡糖苷酸提取分离,并通过13 C NMR鉴定其化学结构,最后采用以4-硝基酚-α-D-吡喃葡萄糖苷(pNPG)为底物的酶抑制剂筛选模型检测其对α-葡萄糖苷酶的抑制活性和类型。结果显示:槲皮素-7-O-β-D-葡糖苷酸分布在20%乙醇大孔吸附树脂(AB-8)洗脱液中,采用半制备高效液相色谱和高效液相色谱分离纯化得槲皮素-7-O-β-D-葡糖苷酸2481.8 mg,纯度为97.95%。活性检测结果表明,槲皮素-7-O-β-D-葡糖苷酸对α-葡萄糖苷酶的最大抑制率为94.67%,IC 50为0.259 mmol/L,抑制率显著高于阳性对照药物阿卡波糖,且抑制剂类型为竞争性抑制。展开更多
文摘With two-year-old Amorpha fruticosa L. cv. Jinye and A. fruticosa as the research objects, the relative conductivity, MDA content, soluble sugar content, solu- ble protein content and proline content in leaf were determined during natural drop in temperature, and the SOD, POD and COD activity in leaf were determined under artificial low temperature to explore the adaptability of A. fruticosa L. cv. Jinye to low temperature. The results showed that with the decrease in natural temperature, the content of MDA in A. fruticosa L. cv. Jinye was lower than that in the control, and the contents of osmotic adjustment substances （soluble sugar, soluble protein and proline） increased, indicating that A. fruticosa L. cv. Jinye had a stronger toler- ance to low temperature compared with A. fruticosa. The activity of SOD, POD and CAT in A. fruticosa L. cv. Jinye increased continuously, higher than that in the con- trol, indicating that the resisting ability of A. fruticosa L. cv. Jinye against low tem- perature was superior to that of the control. There was no significant difference in relative conductivity between A. fruticosa L. cv. Jinye and A. fruticosa.
基金supported by Central University Basic Research Funds(2572014CA27),(2572018DB01)Heilongjiang Province Natural Fund(C200913)
文摘In this paper,the ultrasonic-assisted extraction process of flavonoid compounds from leaves of Amorpha fruticosa is optimized.In single factor experiments,solid/liquid ratios,ultrasonic power,ethanol concentrations and extraction cycles were experimental factors.Box–Behnken central composite design and RSM analyzed the effects of the four factors on the yield of total flavonoids.The optimal extraction parameters were solid/liquid ratio 1:50 g/mL,ultrasonic power 316 W,ethanol concentration 50%,4 extraction cycles.In the optimized condition,the estimated value of the regression model was 66.6456 mg/g while the measured value was 66.4329 mg/g.
基金Supported by National Natural Science Foundation of China(No.81460652)Key Research and Development and Achievements Transformation Program of Qinghai Province(No.2018-SF-144)Project Funded by Key Laboratory of Medicinal Animal and Plant Resources of Qinghai-Tibet Plateau in Qinghai Province(No.2017-z-y25)
文摘[Objectives]To study the effects of Fruticosa potentilla L.on the expression of key enzymes and hormones related to glucose and lipid metabolism in T2DM rats.[Methods]The ethyl acetate fraction of 95%methanol extract of F.potentilla(MEE)was administered orally to the T2DM rats,and the level of glucose and expression of insulin,resistin,leptin,glucokinase(GK)and glucose-6-phosphatase(G-6-Pase)in the rats were measured and detected.[Results]In the T2DM rats administered with MEE,the postprandial blood glucose level decreased,the expression levels of resistin,leptin and G-6-Pase were down-regulated,and the expression levels of insulin and GK were up-regulated(P<0.05,P<0.01).[Conclusions]F.potentilla can reduce effectively postprandial blood glucose level,regulate the expression of a variety of enzymes and hormones related to glucose and lipid metabolism and recover partially the insulin level in T2DM rats to achieve resistance to T2DM.
