The L-arabinose resistance test with Salmonella typhimurium (Ara test) is a forward mutation assay which selects a single phenotypic change (from L-arabinose sensitivity to L-arabinose resistance) in a unique tester strain (an araD mutant). The present study examined the ability of the Ara test to identify as mutagens different classes of chemical carcinogens, including six with detection probl...

Endothelial cells are highlighted using a variety of endothelial markers. One of the best known markers is CD34, a surface antigen. The most used immunohistochemical marker for identification of activated endothelial cells is CD105. We chose to compare these two markers in order to evaluate angiogenesis of the rectal cancers by determining the microvessel density (MVD). Our study included 31 pa...

Openings in fiction have received increasing attention lately from critics concerned both with narrative theory and the explication of specific texts. In his story, "A Poet's Continuing Silence," A. B. Yehoshua provides a series of opening signals that command special interest, since the text focuses directly on beginnings and attempted new beginnings in the lives of the protagonists. The vario...

In this paper, we investigate semisimplicity of cellular algebras over positive characteristic fields. Our main result shows that the Frame number of cellular algebras characterizes semisimplicity of it. In a sense, this is a generalization of Maschke’s theorem. 1. intrudoction Cellular algebras are an object in algebraic combinatorics which were introduced by B. Yu. Weisfeiler and A. A. Lehman...

Chilling of avocado fruit (Persea americana cv. Arad) in the orchard caused a dramatic induction of fruit ripening and a parallel increase in ethylene biosynthesis and receptor genes' expression during shelf life. In-orchard chilling stress stimulated ethylene and CO(2) production already in fruit attached to the tree, and these reduced thereafter during 20 degrees C storage. In non-chilled con...

Aim: To evaluate the role of endoscopic ultrasonography (EUS) in the diagnosis of gallbladder microlithiasis, sludge, and stone in patients with clinical suspicion of cholecystitis, but with normal transabdominal ultrasonography (TUS) during six months follow-up after laparosopic cholecystectomy (LCT). Background: Endosonography has been shown to be highly sensitive in the detection of choledoc...

The Bacillus subtilis araC locus, mapped at about 294 degrees on the genetic map, was defined by mutations conferring an Ara- phenotype to strains bearing the metabolic araA, araB, and araD wild-type alleles (located at about 256 degrees on the genetic map) and by mutants showing constitutive expression of the three genes. In previous work, it has been postulated that the gene in which these mu...

The first temperature-dependent proteins (expressed at 37 degrees C, but not 26 degrees C) to be identified in Yersinia pestis were antigens 3 (fraction 1), 4 (pH 6 antigen), and 5 (hereafter termed KatY). Antigens 3 and 4 are now established virulence factors, whereas little is known about KatY, except that it is encoded chromosomally, produced in abundance, possesses modest catalase activity,...

Background & Aim: Vast variety of plants in various regions of the country and lack of enough information on their chemical combinations, sometimes lead to triggering poisoning and unsatisfied complications. Regarding to fabulous herbal characteristics of Hypricum, many research about poisoning and side effects of high concentrations of H. scabrum have not taken place...