An L(h,k)-labeling of a graph G is an assignment non-negative integers to the vertices such that if two u and v are adjacent then they receive labels differ by at least h, when not but there two-hop path between them, k. The span λ labeling difference largest smallest vertex assigned. Let λhk ( )denote admits L(h,k) -labeling using from {0,1,...λ}. A Cayley group called circulant order n, isomo...

The photoreactive AMP analog, 8-azido-AMP, stimulated the activity of biodegradative threonine dehydratase of Escherichia coli in a reversible manner and, like AMP, decreased the Km for threonine. The concentrations required for half-maximal stimulation by AMP and 8-azido-AMP were 40 microM and 1.5 microM, respectively, and the maximum stimulation by 8-azido-AMP was 25% of that seen with AMP. G...

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In the global context of diversification usable energy sources, use renewable energies, in particular solar photovoltaic energy, is becoming increasingly important. As such, development a new generation cells based on CIGS material promising. Indeed, efficiency these has exceeded 20% recent years. Thus, our work consists modeling tandem cell Cu(In,Ga)Se2 (CGS/CIGS). The goal to optimize its phy...