Abstract A split-by-edges tree of a graph G is a binary tree T where the root = V(G), every leaf is an independent set in G, and for every other node N in T with children L and R there is an edge uv in G such that u and v are in N, L = N – v and R = N – u. Every maximum independent set in G is in the same layer M, which is guarantied to be found in a layer by layer search of T. Every depth-firs...

in order to evaluate of yield, water and radiation use efficiencies in wheat genotypes, a field experiment was conducted using a split split plot design based on a randomized complete block design with three replications at khorasan razavi agricultural and natural resources research centre (mashhad, iran) in 2006-2008. main plots were assigned to two levels of water stress treatments; d1: optim...

Let Λ be an artin algebra and M n-cluster tilting subcategory of mod Λ. We show that has additive generator if only the n-almost split sequences form a basis for relations Grothendieck group every effaceable functor M→Ab finite length. As consequence we type then

The structural properties of the cell envelopes of Mycobacterium leprae and Mycobacterium lepraemurium were investigated by freeze-fracture, freeze-etching, and negative-staining techniques. Freeze-fracture split the cell wall and exposed the internal features of the peptidoglycolipid mycosidic filamentous network. The cell membrane was also split into two asymmetric faces. The external fractur...

The recently published Committee for Medicinal Products for Human Use reflection paper on flexible designs highlights a controversial issue regarding the interpretation of adaptive trials. The guideline suggests that a test for heterogeneity should be preplanned and if treatment effect estimates differ significantly between design stages then data collected before and after the interim analysis...

This is a contribution to the study of the Muchnik and Medvedev lattices of non-empty Π1 subsets of 2 ω. In both these lattices, any non-minimum element can be split, i.e. it is the non-trivial join of two other elements. In fact, in the Medvedev case, if P >M Q, then P can be split above Q. Both of these facts are then generalised to the embedding of arbitrary finite distributive lattices. A c...

Cores were prepared from 50S ribosomal subunits by incubation with 0.4 M LiCl/Mg(++) (0.4c cores); 0.8c cores and corresponding SP(0.4-0.8) split proteins were obtained from 0.4c cores. In the fragment reaction 0.4c cores were active, but 0.8c cores were not. Activity of the 0.8c cores could be restored by reconstitution with the SP(0.4-0.8) fraction. The split proteins were separated by DEAE-c...