Selective catalytic reduction of NO X wi th NH 3 (SCR) has been investigated in a fixed-bed reactor with V 2O 5/TiO 2 catalyst. Reaction temperature, contact time, V 2O 5 content in the catalyst and the injection quan...Selective catalytic reduction of NO X wi th NH 3 (SCR) has been investigated in a fixed-bed reactor with V 2O 5/TiO 2 catalyst. Reaction temperature, contact time, V 2O 5 content in the catalyst and the injection quantity of NH 3 affect the SCR reaction. Increases in react ion temperature and contact time are helpful for SCR reaction, but for their exc essive values the influence of by-reaction will be obvious. The optimum reacti on temperature and contact time are 310?℃ and 200?ms, respectively. NO X re moval increases with n(NH 3)/n(NO X) up to 1.2 and then levels off. When V 2O 5 content in the catalyst is between 1.4% and 4.5% and V 2O 5 is uniformly distributed on TiO 2 carrier, NO X removal increases with the incre ase of V 2O 5 content, but it decreases when V 2O 5 content up to 6.6%. Th e experimental results show that in optimum reaction condition, 90% of NO X can be removed.展开更多
针对磁阀可控电抗器(magnetic control reactor,MCR)产生谐波影响电网的问题,提出将MCR铁心设计成分级磁阀的结构。为此,从理论上比较单级和多级磁阀可控电抗器产生谐波的原理,推导出四级磁阀电抗器谐波电流的表达式,分析了电抗器在不...针对磁阀可控电抗器(magnetic control reactor,MCR)产生谐波影响电网的问题,提出将MCR铁心设计成分级磁阀的结构。为此,从理论上比较单级和多级磁阀可控电抗器产生谐波的原理,推导出四级磁阀电抗器谐波电流的表达式,分析了电抗器在不同工作状态下各饱和度之间的关系,对两种不同结构磁阀电抗器进行模拟仿真和试验数据对比,得出与理论分析基本吻合的结论,表明四级磁阀可控电抗器可大大减少总谐波含量。展开更多
OBJECTIVE:To verify the effects of perilla oil on the regulation of blood lipid levels in patients with hyperlipidemia.METHODS:Blood was taken from patients prior to and 8 weeks following treatment with perilla oil.Di...OBJECTIVE:To verify the effects of perilla oil on the regulation of blood lipid levels in patients with hyperlipidemia.METHODS:Blood was taken from patients prior to and 8 weeks following treatment with perilla oil.Different ways to test for indexes which correlate to hyperlipidemia were performed.Some indexes,which correlate with inflammation and injury to endothelial cells,were tested using enzyme linked immunosorbent assays.RESULTS:Serum lipid levels [triglyceride(TG),total cholesterol(TC),and low-density lipoprotein-cholesterol(LDL-C)] changed significantly after 56 days of treatment.Differences were noted as early as 28 days after treatment began(P<0.05).Treatment with perilla oil showed statistically significant recovery levels of high-density lipoprotein-cholesterol(HDL-C) after 28 and 56 days of treatment.Plasma lipids levels were significantly lower after 56 days of treatment(P<0.05).Perilla oil reduced blood lipid levels in patients,and the regulation of cell signaling factor levels had no adverse effects on patients' liver or kidney function,or blood routine examinations.CONCLUSION:Perilla oil treatment is safe in clinical use,can regulate blood lipid levels and protects the function of endothelial cells.展开更多
文摘Selective catalytic reduction of NO X wi th NH 3 (SCR) has been investigated in a fixed-bed reactor with V 2O 5/TiO 2 catalyst. Reaction temperature, contact time, V 2O 5 content in the catalyst and the injection quantity of NH 3 affect the SCR reaction. Increases in react ion temperature and contact time are helpful for SCR reaction, but for their exc essive values the influence of by-reaction will be obvious. The optimum reacti on temperature and contact time are 310?℃ and 200?ms, respectively. NO X re moval increases with n(NH 3)/n(NO X) up to 1.2 and then levels off. When V 2O 5 content in the catalyst is between 1.4% and 4.5% and V 2O 5 is uniformly distributed on TiO 2 carrier, NO X removal increases with the incre ase of V 2O 5 content, but it decreases when V 2O 5 content up to 6.6%. Th e experimental results show that in optimum reaction condition, 90% of NO X can be removed.
文摘针对磁阀可控电抗器(magnetic control reactor,MCR)产生谐波影响电网的问题,提出将MCR铁心设计成分级磁阀的结构。为此,从理论上比较单级和多级磁阀可控电抗器产生谐波的原理,推导出四级磁阀电抗器谐波电流的表达式,分析了电抗器在不同工作状态下各饱和度之间的关系,对两种不同结构磁阀电抗器进行模拟仿真和试验数据对比,得出与理论分析基本吻合的结论,表明四级磁阀可控电抗器可大大减少总谐波含量。
文摘OBJECTIVE:To verify the effects of perilla oil on the regulation of blood lipid levels in patients with hyperlipidemia.METHODS:Blood was taken from patients prior to and 8 weeks following treatment with perilla oil.Different ways to test for indexes which correlate to hyperlipidemia were performed.Some indexes,which correlate with inflammation and injury to endothelial cells,were tested using enzyme linked immunosorbent assays.RESULTS:Serum lipid levels [triglyceride(TG),total cholesterol(TC),and low-density lipoprotein-cholesterol(LDL-C)] changed significantly after 56 days of treatment.Differences were noted as early as 28 days after treatment began(P<0.05).Treatment with perilla oil showed statistically significant recovery levels of high-density lipoprotein-cholesterol(HDL-C) after 28 and 56 days of treatment.Plasma lipids levels were significantly lower after 56 days of treatment(P<0.05).Perilla oil reduced blood lipid levels in patients,and the regulation of cell signaling factor levels had no adverse effects on patients' liver or kidney function,or blood routine examinations.CONCLUSION:Perilla oil treatment is safe in clinical use,can regulate blood lipid levels and protects the function of endothelial cells.
