Abstract. Let V = C and let T := T (V ) ⊗ T (V ∗) be the mixed tensor algebra over V . We characterize those subsets A of T for which there is a subgroup G of the unitary group U(n) such that A = T. They are precisely the nondegenerate contraction-closed graded ∗-subalgebras of T . While the proof makes use of the First Fundamental Theorem for GL(n,C) (in the sense of Weyl), the characterizatio...

During the course of acute infection with an intracellular pathogen, Ag-specific T cells proliferate in the expansion phase, and then most of the T cells die by apoptosis in the following contraction phase, but the few that survive become memory cells and persist for a long period of time. Although IL-15 is known to play an important role in long-term maintenance of memory CD8+ T cells, the pot...

T cell adequate function is critical for defense against pathogens. Transient disruption of T cell homeostasis occurs when primarily naive cells undergo antigen-driven expansion and acquire effector functions. Effector T cells then either undergo programmed cell death (PCD, it occurs usually as massive apoptosis during the contraction phase of the immune response) or survive to become memory ce...

There exist (C0) semigroups Tx(i), T2(t) on Hubert space with the following properties: 7f has a bounded generator and is uniformly bounded, but is not similar to a contraction semigroup. T2 is uniformly bounded, and there exists no scalar a such that e~"'T2(t) is similar to a contraction semigroup.

The work “Disruption of transverse-tubular network reduces energy efficiency in cardiac muscle contraction” by Mellor et al1 that appears this issue Acta Physiologica brings together the scientific interests and technical skills two worlds: fine intact energetics mechanics (eg Tran al2 other studies Loiselle his collaborators) one disease-associated t-tubule remodelling Crossman al3 Soeller col...

Tyrosine kinase 2 (Tyk2), a member of JAK signal transducer family contributes to the signals triggered by IL-12 for IFN-gamma production. To elucidate potential roles of Tyk2 in generation and maintenance of Ag-specific CD8+ T cells, we followed the fate of OVA-specific CD8+ T cells in Tyk2-deficient (-/-) mice after infection with recombinant Listeria monocytogenes expressing OVA (rLM-OVA). R...

Expulsion of intestinal nematode parasites and the associated increased contraction by intestinal muscle are T cell dependent, since both are attenuated in athymic rodents. The CD4 T-cell subset has been strongly associated with worm expulsion; however, the relationship between these cells, antigen presentation, and worm expulsion is not definitive and the role of these factors in intestinal mu...

Given a surface triangulation T of and a subset X of its vertex set V (T ), we define a restricted edge contraction as a contraction of an edge connecting X and V (T )−X. Boundary vertices in V (T ) − X are only allowed to be contracted to the boundary vertices in X adjacent through boundary edges. In this paper, we prove that if a triangulation T of the sphere with boundary satisfies some conn...