The relationship between the induction of DNA damage as reflected by sister chromatid exchange (SCE) formation and morphological transformation in exponentially growing Syrian hamster embryo cells was determined quantitatively after split doses of chemical or physical carcinogens. With split doses of carcinogen separated by 2 to 24 hr, only N-acetoxy-2-fluorenyl-acetamide (0.50 microgram/ml) en...

Split cuts are among the most important and well-understood cuts for general mixed-integer programs. In this paper we consider some recent generalizations of split cuts and compare their relative strength. More precisely, we compare the elementary closures of split, cross, crooked cross and general multi-branch split cuts as well as cuts obtained from multi-row and basic relaxations. We present...

Background In healthy subjects the papillary muscles (PM’s) are usually organized as two equal-sized muscles holding an anterolateral and posteromedial position in the left ventricle (LV). However, as described in observational autopsy studies, their morphology may vary. There may be two clear PM’s or one or both muscles may be split into several groups. In this study, morphological differences...

Objective: Field experiment was conducted in 2009 to investigate the effects of plant density and weed interference on morphological characteristics and yield of corn (Zea Mays, L.) at Research Station of University of Tabriz, Tabriz, Iran. Methods: The experiment was arranged as split plot based on randomized complete block design with three replications. Plant density (D1, D2, D3 and D4: 5, 7...