CO adsorption on Ru(100) and Cs/Ru(10O) surfaces has been investigated using ARUPS, at low temperature 150K. The 5σ+1π and 4σ levels of CO molecule were found in angle-rcsolved UP spectra showing that CO is in mol...CO adsorption on Ru(100) and Cs/Ru(10O) surfaces has been investigated using ARUPS, at low temperature 150K. The 5σ+1π and 4σ levels of CO molecule were found in angle-rcsolved UP spectra showing that CO is in molecular adsorption states on clean and Cs precovercd Ru(100). The dependence of CO 4σ intensity on incident angle suggests that adsorbed CO stands upright on clean Ru(100) surface; But adsorbed CO, with a short-range interaction with Cs atom [15], does not stand upright and tilts in <1210> azimuth on a Cs-precovered Ru(100) surface.展开更多
The presence of a relatively mature CD4+CD8- (SP)T cell subset in mouse thymus has been demonstrated. Composing of 10% of total CD4SP thymocytes, this subset is defined by the absence of 3G11 and 6C10 expression with ...The presence of a relatively mature CD4+CD8- (SP)T cell subset in mouse thymus has been demonstrated. Composing of 10% of total CD4SP thymocytes, this subset is defined by the absence of 3G11 and 6C10 expression with a phenotype of CD69 +/- , HSAmed/lo and heterogeneous for Qa - 2 expression. The proliferation capability of TCRαβ+ 3G11-6C10- CD4+ CD8- thymocytes was high while using Con A stimulus. And Con A stimulation could result in secretion of IL-4, IL-10, IL-6 and a little amount of IFNγ. IL-2 was barely detectable. This is distinct from typical Th0 type cytokines. The cells of this subset were NK1.1 negative, but strongly expressed GATA-3 mRNA. The results suggest that the CD4+ subset of 3G11 - 6C10- NK1.1 - phenotype possesses immunocompetent cells with functions characteristic of Th2-like cytokines, which may indicate the cells at transitional status from ThO to Th2, with a propensity to Th2.展开更多
文摘CO adsorption on Ru(100) and Cs/Ru(10O) surfaces has been investigated using ARUPS, at low temperature 150K. The 5σ+1π and 4σ levels of CO molecule were found in angle-rcsolved UP spectra showing that CO is in molecular adsorption states on clean and Cs precovercd Ru(100). The dependence of CO 4σ intensity on incident angle suggests that adsorbed CO stands upright on clean Ru(100) surface; But adsorbed CO, with a short-range interaction with Cs atom [15], does not stand upright and tilts in <1210> azimuth on a Cs-precovered Ru(100) surface.
基金Project supported by the National Natural Science Foundation of China (Grant No. 39730410).
文摘The presence of a relatively mature CD4+CD8- (SP)T cell subset in mouse thymus has been demonstrated. Composing of 10% of total CD4SP thymocytes, this subset is defined by the absence of 3G11 and 6C10 expression with a phenotype of CD69 +/- , HSAmed/lo and heterogeneous for Qa - 2 expression. The proliferation capability of TCRαβ+ 3G11-6C10- CD4+ CD8- thymocytes was high while using Con A stimulus. And Con A stimulation could result in secretion of IL-4, IL-10, IL-6 and a little amount of IFNγ. IL-2 was barely detectable. This is distinct from typical Th0 type cytokines. The cells of this subset were NK1.1 negative, but strongly expressed GATA-3 mRNA. The results suggest that the CD4+ subset of 3G11 - 6C10- NK1.1 - phenotype possesses immunocompetent cells with functions characteristic of Th2-like cytokines, which may indicate the cells at transitional status from ThO to Th2, with a propensity to Th2.
