Objective: The present study is to determine the potential treatment effects of ethyl acetate fraction of Tephrosia purpurea Linn. leaves(EATP) against gout.Methods: Gout in experimental rats was induced with potassiu...Objective: The present study is to determine the potential treatment effects of ethyl acetate fraction of Tephrosia purpurea Linn. leaves(EATP) against gout.Methods: Gout in experimental rats was induced with potassium oxonate at the dose of 250 mg/kg(intraperitoneal injection) for 7 consecutive days;EATP was administered 1 h after administration of the potassium oxonate on each day of experiment. Potassium oxonate was discontinued on the 8 th day;thereafter allopurinol(10 mg/kg, p.o.) and EATP(200 and 400 mg/kg, p.o.) were continued until day 14. The uric acid level was measured from serum and urine during the experiment. Other biochemical parameters were assessed, including blood and urine creatinine, erythrocyte sedimentation rate, and total protein. Blood urea nitrogen, serum aspartate aminotransferase serum alanine aminotransferase and alkaline phosphatase were also measured. The blood was analyzed for levels of malondialdehyde and the antioxidant enzymes such as superoxide dismutase, catalase and glutathione peroxidase.Histopathological and radiological changes in the ankle of rats were observed after completion of the experiment.Results: EATP was able to decrease serum uric acid and creatinine level;it also reduced inflammation,oxidative stress and lysosomal enzyme level, which has a role in acute inflammation. EATP increased uric acid excretion through urine due to its uricosuric effect.Conclusion: EATP lowered the serum uric acid level and increased the urine uric acid level through excretion, which is useful in the treatment of gout. Hence the EATP was found to be helpful in the treatment of gout.展开更多
The photochemical air pollution in Xigu district of Lanshou city, Gansu Province was studied during a period of 1981-1984. The extremely high NMHC/NOx ratio and ozone level elevation after rain have been noticed. A se...The photochemical air pollution in Xigu district of Lanshou city, Gansu Province was studied during a period of 1981-1984. The extremely high NMHC/NOx ratio and ozone level elevation after rain have been noticed. A series of outdoor and indoor reaction chamber simulation experiments conducted in order to understand the specific conditions. The ozone formation under NMHC/NOx condition and the possible reason for high ozone concentration after rain are discussed.展开更多
Oxone （3.5 mol%） was found to be an effective catalyst for the condensation reactions of indoles with aldehydes to afford bisindolylmethanes in good to excellent yields within 10-30min. The method is simple and econ...Oxone （3.5 mol%） was found to be an effective catalyst for the condensation reactions of indoles with aldehydes to afford bisindolylmethanes in good to excellent yields within 10-30min. The method is simple and economic. The catalyst is found to be recyclable.展开更多
基金Project supported by the National Natural Science Foundation of China(No.21572126)the Program of Science and Technology Innovation Talents of Henan Province(No.2018JQ0011)+1 种基金the Natural Science Foundation of Hebei Province(No.B2019201415)the Fundamental Research Funds for the Midwest Universities Comprehensive Strength Promotion Project(No.521000981026)。
文摘Objective: The present study is to determine the potential treatment effects of ethyl acetate fraction of Tephrosia purpurea Linn. leaves(EATP) against gout.Methods: Gout in experimental rats was induced with potassium oxonate at the dose of 250 mg/kg(intraperitoneal injection) for 7 consecutive days;EATP was administered 1 h after administration of the potassium oxonate on each day of experiment. Potassium oxonate was discontinued on the 8 th day;thereafter allopurinol(10 mg/kg, p.o.) and EATP(200 and 400 mg/kg, p.o.) were continued until day 14. The uric acid level was measured from serum and urine during the experiment. Other biochemical parameters were assessed, including blood and urine creatinine, erythrocyte sedimentation rate, and total protein. Blood urea nitrogen, serum aspartate aminotransferase serum alanine aminotransferase and alkaline phosphatase were also measured. The blood was analyzed for levels of malondialdehyde and the antioxidant enzymes such as superoxide dismutase, catalase and glutathione peroxidase.Histopathological and radiological changes in the ankle of rats were observed after completion of the experiment.Results: EATP was able to decrease serum uric acid and creatinine level;it also reduced inflammation,oxidative stress and lysosomal enzyme level, which has a role in acute inflammation. EATP increased uric acid excretion through urine due to its uricosuric effect.Conclusion: EATP lowered the serum uric acid level and increased the urine uric acid level through excretion, which is useful in the treatment of gout. Hence the EATP was found to be helpful in the treatment of gout.
文摘The photochemical air pollution in Xigu district of Lanshou city, Gansu Province was studied during a period of 1981-1984. The extremely high NMHC/NOx ratio and ozone level elevation after rain have been noticed. A series of outdoor and indoor reaction chamber simulation experiments conducted in order to understand the specific conditions. The ozone formation under NMHC/NOx condition and the possible reason for high ozone concentration after rain are discussed.
文摘Oxone （3.5 mol%） was found to be an effective catalyst for the condensation reactions of indoles with aldehydes to afford bisindolylmethanes in good to excellent yields within 10-30min. The method is simple and economic. The catalyst is found to be recyclable.
