We compared the cytotoxic activities of thymus-dependent and thymus-independent CD8(+) T cells. Thymus-dependent CD8(+) T cells, which are foreign antigen specific, acquired cytotoxic activity to tumor cells with a basal dose of the antigen peptides and to hybridoma cells expressing anti-TCR mAb only after differentiation into effector cytotoxic T lymphocytes (CTL). In contrast, thymus-independ...

The ability of protein kinase from bovinepineal gland to phosphorylate calf-thymus chromatin and thereby to alter the association between chromatin DNA and histones was investigated. Phosphorylation of calf-thymus chromatin by pineal protein kinase results in an apparent decreased binding between the histones and DNA in chromatin, as indicated by (i) an increase in actinomycin D-binding sites a...

For graphs H and F, the generalized Turán number ex(n,H,F) is largest of copies in an F-free graph on n vertices. We say that F-Turán-good if (χ(F)−1)-partite graph, provided large enough. present a general theorem case F has edge whose deletion decreases chromatic number. In particular, this determines ex(n,Pk,C2ℓ+1) ex(n,C2k,C2ℓ+1) exactly, also study when vertex

The migration of developing T cells (thymocytes) between distinct thymic microenvironments is crucial for their development. Ex vivo studies of thymus tissue explants suggest two distinct migratory behaviors of thymocytes in the thymus. In the cortex, thymocytes exhibit a stochastic migration, whereas medullary thymocytes show confined migratory behavior. Thus far, it has been difficult to foll...

We report the presence and diversity of Bartonella spp. in bats of 13 insectivorous and frugivorous species collected from various locations across Kenya. Bartonella isolates were obtained from 23 Eidolon helvum, 22 Rousettus aegyptiacus, 4 Coleura afra, 7 Triaenops persicus, 1 Hipposideros commersoni, and 49 Miniopterus spp. bats. Sequence analysis of the citrate synthase gene from the obtaine...

objective: the aim of this experiment   was to observe and study the effects of two anti-fungus essences. methods: thymus vulgaris and thymus kotschyanus, against two fungi pathogens botrytis cinerea and rhizopus stolonifere, and the quality of strawberries after cropping. this study is performed in two assays, in vitro and in vivo.  a treatment consists: control, 200, 400, 600, 800, 1000 µl/l....