The ultrafine powders of YBa2Cu3O7-x with the size of 100nm were synthesized by Sol-Gel process using cit-rate as complex and ammonium hydroxide to adjust pH of solu-tion. The process of Sol formation and Gel polymeri...The ultrafine powders of YBa2Cu3O7-x with the size of 100nm were synthesized by Sol-Gel process using cit-rate as complex and ammonium hydroxide to adjust pH of solu-tion. The process of Sol formation and Gel polymerization of YBa2Cu3O7-x in the Sol-Gel synthetic reaction has bee studied. The particle size ,pruity, sintering activity and superconducting properties of YBa2Cu3O7-x prepared by Sol-Gel method are better than by solid state reaction.展开更多
The morphology and the formation of Y2BaCuO5 phase in powder melting processed YBa2Cu3O7-x superconductors were investigated. The experimental results show the heat treatment can not change the shape of Y2BaCuO5 parti...The morphology and the formation of Y2BaCuO5 phase in powder melting processed YBa2Cu3O7-x superconductors were investigated. The experimental results show the heat treatment can not change the shape of Y2BaCuO5 particles in powder melting processed samples. The formation of round Y2BaCuO5 phase is due to relative content of each constitution of precursor powders in powder melting process. For powder melting process, the excessive liquid phase is eliminated, which restrains the preferred growth of Y2BaCuO5 particles.展开更多
目的:观察蒙药德都红花-7味散对非酒精性脂肪肝的治疗作用及其机制,为临床用药提供理论依据.方法:取Wister♂大鼠,随机分为空白组8只、空白给药(德都红花-7味散)、模型组、德都红花-7味散低、高剂量组,各组10只.除空白组和空白给药组,按...目的:观察蒙药德都红花-7味散对非酒精性脂肪肝的治疗作用及其机制,为临床用药提供理论依据.方法:取Wister♂大鼠,随机分为空白组8只、空白给药(德都红花-7味散)、模型组、德都红花-7味散低、高剂量组,各组10只.除空白组和空白给药组,按2 m L/100 g脂肪乳剂灌胃,1次/d,共计给脂肪乳剂灌胃4 wk.空白给药组、德都红花-7味散低、高剂量组分别给予蒙药德都红花-7味散0.6、0.6、3.0 g/(kg·d).各给药组均提前7 d给药,给药体积为1 m L/100 g,1次/d,灌胃给药;其他两组灌胃等体积蒸馏水,共计给药5 wk.观察各组大鼠血脂四项,肝功,肝组织匀浆中总胆固醇(cholesterol,CHO)、甘油三酯(triglyceride,TG)、超氧化物歧化酶(superoxide dismutase,SOD)、丙二醛(malondialdehyde,MDA)含量;HE染色观察肝脏细胞脂肪变程度.结果:与空白组比较,模型组大鼠血清TG、CHO、低密度脂蛋白(low density lipoprotein cholesterol,LDL-C)、肝匀浆TG、CHO、MDA、空白给药组MDA升高,血清高密度脂蛋白(high density lipoprotein cholesterol,HDL-C)、肝匀浆SOD明显降低;德都红花-7味散低、高剂量组大鼠血清CHO、LDL-C升高,有显著性差异(P<0.05).与模型组比较,低剂量组血清TG降低,高剂量组血清CHO、LDL-C降低、HDL-C升高,空白给药组肝匀浆TG、CHO、MDA降低,SOD升高;低剂量组肝匀浆TG、CHO、MDA降低,高剂量组肝匀浆TG、MDA降低,SOD升高有显著性差异(P<0.05).给药组肝组织脂肪变程度较模型组明显减轻.结论:蒙药德都红花-7味散治疗高质饮食脂肪肝疗效确切,抗脂质过氧化可能是其治疗机制的一部分.展开更多
文摘The ultrafine powders of YBa2Cu3O7-x with the size of 100nm were synthesized by Sol-Gel process using cit-rate as complex and ammonium hydroxide to adjust pH of solu-tion. The process of Sol formation and Gel polymerization of YBa2Cu3O7-x in the Sol-Gel synthetic reaction has bee studied. The particle size ,pruity, sintering activity and superconducting properties of YBa2Cu3O7-x prepared by Sol-Gel method are better than by solid state reaction.
基金Funded by the National Natural Science Foundation of China (50432050)the National High Technology Research and Development Program of China(2007AA03Z241)
文摘The morphology and the formation of Y2BaCuO5 phase in powder melting processed YBa2Cu3O7-x superconductors were investigated. The experimental results show the heat treatment can not change the shape of Y2BaCuO5 particles in powder melting processed samples. The formation of round Y2BaCuO5 phase is due to relative content of each constitution of precursor powders in powder melting process. For powder melting process, the excessive liquid phase is eliminated, which restrains the preferred growth of Y2BaCuO5 particles.
文摘目的:观察蒙药德都红花-7味散对非酒精性脂肪肝的治疗作用及其机制,为临床用药提供理论依据.方法:取Wister♂大鼠,随机分为空白组8只、空白给药(德都红花-7味散)、模型组、德都红花-7味散低、高剂量组,各组10只.除空白组和空白给药组,按2 m L/100 g脂肪乳剂灌胃,1次/d,共计给脂肪乳剂灌胃4 wk.空白给药组、德都红花-7味散低、高剂量组分别给予蒙药德都红花-7味散0.6、0.6、3.0 g/(kg·d).各给药组均提前7 d给药,给药体积为1 m L/100 g,1次/d,灌胃给药;其他两组灌胃等体积蒸馏水,共计给药5 wk.观察各组大鼠血脂四项,肝功,肝组织匀浆中总胆固醇(cholesterol,CHO)、甘油三酯(triglyceride,TG)、超氧化物歧化酶(superoxide dismutase,SOD)、丙二醛(malondialdehyde,MDA)含量;HE染色观察肝脏细胞脂肪变程度.结果:与空白组比较,模型组大鼠血清TG、CHO、低密度脂蛋白(low density lipoprotein cholesterol,LDL-C)、肝匀浆TG、CHO、MDA、空白给药组MDA升高,血清高密度脂蛋白(high density lipoprotein cholesterol,HDL-C)、肝匀浆SOD明显降低;德都红花-7味散低、高剂量组大鼠血清CHO、LDL-C升高,有显著性差异(P<0.05).与模型组比较,低剂量组血清TG降低,高剂量组血清CHO、LDL-C降低、HDL-C升高,空白给药组肝匀浆TG、CHO、MDA降低,SOD升高;低剂量组肝匀浆TG、CHO、MDA降低,高剂量组肝匀浆TG、MDA降低,SOD升高有显著性差异(P<0.05).给药组肝组织脂肪变程度较模型组明显减轻.结论:蒙药德都红花-7味散治疗高质饮食脂肪肝疗效确切,抗脂质过氧化可能是其治疗机制的一部分.
