Model fecal deposits from cattle fed or not fed antimicrobial growth promoters were examined over 175 days in the field for growth and persistence of total Escherichia coli and numbers and proportions of ampicillin-resistant (Amp(r)) and tetracycline-resistant (Tet(r)) E. coli. In addition, genotypic diversity and the frequency of genetic determinants encoded by Amp(r) and Tet(r) E. coli were i...

We studied the mutagenicity of the proximate bladder carcinogen, N-hydroxy-4-acetylaminobiphenyl (N-OH-AABP) in embryonic fibroblasts of the Big Blue mouse. Treatment of these cells with increasing concentrations of N-OH-AABP for 24 h resulted in a dose-dependent increase in mutation frequency of the cII transgene up to 12.8-fold over the background. Single base substitutions comprised 86% of t...

Effects of excess of dietary methionine (6.5 and 8.5 g kgG1 diet) and lysine (13.5 and 15.5 g kgG1 diet) on performance, blood lipid profile and litter quality of broiler chickens fed corn-soybean meal based diet with or without supplementation of L-carnitine with two levels (175 and 350 mg kgG1 diet) were investigated. Two hundred forty one day old chicks (Cobb) of mixed sex were housed in pen...

Zearalenone contamination of 175 wheat samples produced in 2004 in Golestan province, northern Iran was determined. The 10-20 kg samples collected at different stages, including pre-harvest, before and after storage for 2 months in local silos. Samples were ground and sub-sampled with an analytical Romer mill. Each sample extract was cleaned-up using an immunoaffinity column. Zearalenone levels...

In this paper, Taguchi method was applied to determine the optimum conditions for Zn (II) removal from aqueous solution by halloysite nanotubes (HNTs). An orthogonal array experimental design (L16 (45) which is of five control factors including pH, t (contact time), m (adsorbent mass), T (temperature) and C0 (initial concentration of Zn (II)) having four levels ...

Nafamostat mesilate (FUT-175) is a protease inhibitor, working as an inactivator of coagulation, fibrinolysis and platelet aggregation. Although FUT-175 directly blocks contact factors in coagulation, it also may decrease activation of humoral cascade systems when used in cardiopulmonary bypass circuits. We performed an in vitro study using fresh human blood in the following cardiopulmonary byp...

Background and purpose: Laryngeal cancers are associated with high rates of mortality and disability. No effective screening test is proven for this disease, so, the best way seems to be controlling the disease by identifying and eliminating individual predisposing factors. The aim of this study was to pave the way for a better understanding of the risk factors and factors affecting the type an...

In this paper, Taguchi method was applied to determine the optimum conditions for Zn (II) removal from aqueous solution by halloysite nanotubes (HNTs). An orthogonal array experimental design (L16 (45) which is of five control factors including pH, t (contact time), m (adsorbent mass), T (temperature) and C0 (initial concentration of Zn (II)) having four levels ...