排序方式: 共有27条查询结果,搜索用时 15 毫秒
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RITVA LINDBERG GORAN SUNDHOLM JOHAN SJö BLOM PETRI AHONEN ESKO I. KAUPPINEN 《Journal of Dispersion Science and Technology》2013,34(1-2):715-722
The zeta-potentials of silica, copper, platinum and gold particles have been measured as a function of pH. The isoelectric points were found to be at pH 3.0, 5.8, 3.0 and 3.5, respectively. In the pH range 3.0 to 5.8 copper and silica particles are oppositely charged and accordingly the coating of silica with copper particles could be demonstrated. In the case of gold and platinum the sign of the charge is such that direct adhesion to silica particles cannot be expected and this was also demonstrated in the case of platinum. 相似文献
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van Enk SJ 《Physical review letters》2000,84(4):789; author reply 790
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U.J. Schrewe P. Tidemand-Petersson G.M. Gowdy R. Kirchner O. Klepper A. Płochocki W. Reisdorf E. Roeckl J.L. Wood J. Żylicz R. Fass D. Schardt 《Physics letters. [Part B]》1980,91(1):46-50
Using on-line mass separation of evaporation residues from heavy-ion-induced fusion reactions, three new isotopes were identified by their alpha decay, Eα given in keV: 183Pb, 6715(20), 184Pb, 6632(10) and 188Bi, 6820(20). Half-lives were determined for 184Pb, 0.55(6)s, 185Pb, 4.1(3)s and 183Tl, 0.060(15) s. The alpha branching ratios were re-measured for 182–184Hg and 178, 179Pt, the results are discussed within the framework of alpha width systematics. 相似文献
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Douglas McHugh Sherry SJ Hu Neta Rimmerman Ana Juknat Zvi Vogel J Michael Walker Heather B Bradshaw 《BMC neuroscience》2010,11(1):44
Background
Microglia provide continuous immune surveillance of the CNS and upon activation rapidly change phenotype to express receptors that respond to chemoattractants during CNS damage or infection. These activated microglia undergo directed migration towards affected tissue. Importantly, the molecular species of chemoattractant encountered determines if microglia respond with pro- or anti-inflammatory behaviour, yet the signaling molecules that trigger migration remain poorly understood. The endogenous cannabinoid system regulates microglial migration via CB2 receptors and an as yet unidentified GPCR termed the 'abnormal cannabidiol' (Abn-CBD) receptor. Abn-CBD is a synthetic isomer of the phytocannabinoid cannabidiol (CBD) and is inactive at CB1 or CB2 receptors, but functions as a selective agonist at this Gi/o-coupled GPCR. N-arachidonoyl glycine (NAGly) is an endogenous metabolite of the endocannabinoid anandamide and acts as an efficacious agonist at GPR18. Here, we investigate the relationship between NAGly, Abn-CBD, the unidentified 'Abn-CBD' receptor, GPR18, and BV-2 microglial migration. 相似文献8.
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A.G. Schmidt R.L. Mlekodaj E.L. Robinson F.T. Avignone J. Lin G.M. Gowdy G.L. Wood R.W. Fink 《Physics letters. [Part B]》1977,66(2):133-135
Isomeric decays were observed in on-line mass-separated products following the bombardment of 180W and 182W with 14N. The isomers are placed in 185,187Tl with half lives of 1.8 ± 0.3 and 16 ± 1 s, respectively. The systematics of the low-lying levels of 185–201Tl strongly suggest that the h level intrudes into the next lowest shell and drops below the d level at 191Tl, crosses again at 187Tl and commences to depart the shell with further decrease in N. 相似文献