Results 111 to 120 of about 117,779 (157)

[Determination of 40 carbonyl compounds in ambient air by high performance liquid chromatography-triple quadrupole mass spectrometry]. [PDF]

Se Pu
Li GH, Deng S, Li QQ, Zhang CL, Liu YF, Jiang B, Yao Q, Wang H, Wang BG.   +8 more
europepmc   +1 more source

一种丙烯二聚制备六碳烯烃的催化体系

, 2003
一种丙烯二聚制备六碳烯烃的反应，由二(水杨醛亚胺)镍(II)配合物、有机铝化合物，或二(水杨醛亚胺)镍(II)配合物、有机铝化合物和有机膦组成。该体系在有机溶剂存在下，催化丙烯二聚反应。利用二(水杨醛亚胺)镍(II)配合物、有机铝化合物体系催化丙烯二聚反应，催化活性可达60000-120000mol C3＝/mol Ni·h，二聚选择性为70-90％，二聚产物中甲基戊烯(MP)的含量为80％；用二(水杨醛)镍(II)配合物、有机铝化合物和有机膦体系催化丙烯二聚反应，催化活性高达240000mol C3＝/
陆世维, 吴思忠
core  

[Effect of composite graphene-protein hydrogels on neural regeneration after spinal cord injury in rats]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhang Z, Fan Z, Wang X, Zhu Z.
europepmc   +1 more source

一种丙烯二聚合成2，3-二甲基丁烯的方法

, 2004
一种丙烯二聚合成2，3-二甲基丁烯的方法，在有机溶液或液体丙烯中，由催化体系催化丙烯二聚反应。催化体系由主催化剂二(取代水杨醛亚胺)镍配合物/有机铝化合物/有机膦组成，其中有机铝化合物的用量Al/Ni(摩尔比)为10-2000，有机膦的用量P/Ni(摩尔比)为0.1-100。反应温度为-50～100℃；反应时间为0.1～6小时。反应活性高达250000molC3＝/(mol Ni·h)，二聚产物中2，3-二甲基丁烯的选择性也达61％，二聚选择性也大于85％。反应以混合六碳烯烃为溶剂或者在液体丙烯中进行时，
陆世维, 吴思忠
core  

[Determination of 22 organophosphates and their metabolites and 11 phthalate metabolites in human whole blood by ultra performance liquid chromatography-tandem mass spectrometry]. [PDF]

Se Pu
Shi FY, Xu HY, Li JH, Xu MY.
europepmc   +1 more source

[Biomechanical study of polymethyl methacrylate bone cement and allogeneic bone for strengthening sheep vertebrae]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi, 2021
Wang Z, Zhang X, Li Z, Feng Q, Chen J, Xie W.   +5 more
europepmc   +1 more source

丙烯酸/马来酸酐高吸水树脂的合成

, 2005
以丙烯酸(AA)、丙烯酸盐和马来酸酐(MA)为原料,过硫酸铵(APS)为引发剂,N,N-亚甲基双丙烯酰胺(MBA)和甘油为交联剂,采用水溶液聚合法合成了一种新型的高吸水树脂. 考察了交联剂用量、引发剂用量以及马来酸酐氨化程度对高吸水树脂吸水性能的影响,并通过正交实验优化了条件,使合成的高吸水树脂对去离子水和0.9%的NaCl水溶液的吸收能力分别达到1689 g/g和115 g ...
任天瑞, 王立勇
core  

[Effects of gelatin methacrylate anhydride hydrogel loaded with small extracellular vesicles derived from human umbilical cord mesenchymal stem cells in the treatment of full-thickness skin defect wounds in mice]. [PDF]

Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi
Chen YQ, Zhou YQ, Wei Q, Xie XY, Liu XZ, Li DW, Shen ZA.   +6 more
europepmc   +1 more source

[<i>Angelica sinensis</i> polysaccharide ameliorates endometriosis in rats by restoring autophagic homeostasis via inhibition of Keap1/Nrf2/HO-1-mediated oxidative stress]. [PDF]

Zhejiang Da Xue Xue Bao Yi Xue Ban
Li J, Li X, Ji X, Huang Y, Wang Z.
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