نتایج جستجو برای: e2m
تعداد نتایج: 17 فیلتر نتایج به سال:
where ∧ denotes exterior product. The above expression is the exterior product of M two-forms of rank two, which produces a volume form D2,2(v1, . . . , v4M ) in the 2M -dimensional linear space. If we fix a basis e1, . . . , e2M in the linear space, then each of the vectors vi can be expressed as a sequence of 2M numbers, and D2,2(v1, . . . , v4M ) is also a number (the coefficient at e1∧. . ....
Excessive ultraviolet B (UVB) irradiation causes apoptotic cell death or induction of tumors in skin. Melatonin is a promising antioxidant and direct radical scavenger. Recently, it was reported that melatonin increases the survival of ultraviolet-B (UVB)-irradiated HaCaT keratinocyte cell lines. However, the precise molecular mechanisms underlying protective effect of melatonin on UVB damage a...
Let e1, e2, . . . be a sequence of edges chosen uniformly at random from the edge set of the complete graph Kn (i.e. we sample with replacement). Our goal is to choose, for m as large as possible, a subset E ⊆ {e1, e2, . . . , e2m}, |E| = m, such that the size of the largest component in G = ([n], E) is o(n) (i.e. G does not contain a giant component). Furthermore, the selection process must ta...
BACKGROUND A number of oncoproteins and tumor suppressors are known to be neddylated, but whether the neddylation pathway is entirely activated in human cancer remains unexplored. METHODS NEDD8-activating enzyme (NAE) (E1) and NEDD8-conjugating enzyme (E2) expression and global-protein neddylation were examined by immunohistochemistry, immunoblotting, and real-time polymerase chain reaction a...
The oxidation-reduction midpoint potentials, Em, of the FAD and active site disulfide couples of Escherichia coli thioredoxin reductase have been determined from pH 5.5 to 8.5. The FAD and disulfide couples have similar Em values and thus a linked equilibrium of four microscopic enzyme oxidation-reduction states exists. The binding of phenylmercuric acetate to one enzyme form could be monitored...
In recent years, considerable attention has been directed towards the study of strongly nonlinear oscillators, and several 2 methods such as perturbation techniques [1–15] or harmonic balance based methods [15–23] have been used to find 3 approximate solutions to nonlinear problems [1–4]. An excellent review of some asymptoticmethods for strongly nonlinear 4 equations can be found in detail in ...
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