Results 71 to 80 of about 822,429 (117)

一种甲基环氧氯丙烷的制备方法

, 2008
一种甲基氯丙烯用反应控制相转移催化剂催化环氧化制取甲基环氧氯丙烷的新方法。这类催化剂本身不溶于反应介质中，但在过氧化氢的作用下，能够形成可溶于反应介质中的活性物种，进而与甲基氯丙烯作用，使其高选择性地进行环氧化反应，甲基氯丙烯对过氧化氢的转化率达96％，甲基环氧氯丙烷对甲基氯丙烯的选择性为95％；而当过氧化氢被消耗完，催化剂即从反应体系中析出，通过简单的分离，催化剂就可以回收循环使用。这类催化剂的分离和多相催化剂相似，而在反应过程中则完全体现出均相催化剂的特点。本方法催化剂回收容易，反应体系简单 ...
高 爽, 奚祖威, 赵公大
core  

[Recent advances of affinity ultrafiltration-liquid chromatography-mass spectrometry in screening natural active substances]. [PDF]

Se Pu
Xu YB, Niu YJ, Guo MQ.
europepmc   +1 more source

甲苯甲醇烷基化制对二甲苯和低碳烯烃固定床催化剂及应用

, 2009
一种甲苯甲醇烷基化制对二甲苯和低碳烯烃固定床催化剂，由金属、非金属或/和稀土金属改性后的沸石分子筛再经硅氧烷基化合物修饰表面酸性和孔结构得到；其中：碱土金属含量为催化剂总重量的0.1-8wt％；非金属含量为催化剂总重量的0.1-8wt％；稀土金属含量为催化剂总重量的 0.1-5wt％；硅氧烷基化合物修饰后Si的担载量为催化剂总重量的1-10wt％。该催化剂用于甲苯甲醇选择性烷基化制对二甲苯和低碳烯烃反应，产物中对二甲苯在二甲苯异构体中的选择性大于99％，乙烯和丙烯在C1-C5组分中选择性大于90 ...
刘中民, 于政锡, 张新志, 王莹利, 许 磊   +4 more
core  

[The role of hepatocyte programmed cell death in liver fibrosis]. [PDF]

Zhonghua Gan Zang Bing Za Zhi
Zhou M, Zeng ZJ, Yang XK, Li H.
europepmc   +1 more source

[<i>Miao</i> medicine <i>Sidaxue</i> regulates macrophage polarization and alleviates synovial inflammation in collagen-induced arthritis rats by inhibiting HIF-1α/PDK1-mediated glycolytic reprogramming]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Shen W, Chen Y, Fu X, Yuan J, Zhou J, Huang L, Wu N.   +6 more
europepmc   +1 more source

[CEBPA promotes hepatic steatosis in metabolic dysfunction-associated fatty liver disease in mice <i>via</i> the SREBP-1c/FASN/ACC axis]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Zhang L, Zou L, Zhou L, Ma X, Liu X, Yao H, Zhuang Y, Yu Y.   +7 more
europepmc   +1 more source

[Bushen Yijing Formula attenuates amyloid β-protein deposi-tion and oxidative damage in <i>Caenorhabditis elegans</i>]. [PDF]

Zhejiang Da Xue Xue Bao Yi Xue Ban
Lu Y, Li D, Hu Y, Lu L, Yu G.
europepmc   +1 more source

[Clinical and genetic characteristics and follow-up of 12 children with hypophosphatasia]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Wu S, Wang YR, Hu JY, Chang GY, Li X, Li Q, Ding Y, Yu TT, Wang XM.   +8 more
europepmc   +1 more source

[Research progress in the application of molecular imprinting technology in catalysis]. [PDF]

Se Pu
Ye WM, He DC, Cui XJ, Ma HW, Qian B, Shi F.   +5 more
europepmc   +1 more source

[Identification of conservation and restoration materials for iron relics through ultraviolet-induced visible luminescence imaging and pyrolysis-gas chromatography/mass spectrometry]. [PDF]

Se Pu
Yang Q, Ding L, Li ZH, Zhang R, Wei Y, Chen Y.   +5 more
europepmc   +1 more source