نتایج جستجو برای: flat rolling
تعداد نتایج: 77016 فیلتر نتایج به سال:
Sphingosine-1-phosphate (S1P) participates in inflammation; however, its role in leukocyte rolling is still unclear. Here we use intravital microscopy in inflamed mouse cremaster muscle venules and human endothelial cells to show that S1P contributes to P-selectin-dependent leukocyte rolling through endothelial S1P receptor 3 (S1P3) and Gαq, PLCβ and Ca(2+). Intra-arterial S1P administration in...
سابقه و هدف: با توجه به وفور بالای کژدم mesobuthus eupeus در ایران و نقش چشمگیر این کژدم، به عنوان یکی از عوامل اصلی کژدم گزیدگی در کاشان و اهمیت، مطالعه روی جنبه های مختلف زیستی کژدم، چگونگی کنترل آن ها، این مطالعه به منظور تعیین پراکندگی کژدم مزبور با دو روش صید، rock-rolling و (black light (uv طی سال های 80-1379 در شهرستان کاشان انجام گرفت. مواد و روش ها: این مطالعه به روش توصیفی صورت پذیرفت...
multi frequency vibrations of a system of two isotropic circular plates interconnected by a rolling visco-elastic layer that has nonlinear characteristics are considered. the system with two circular plates and interconnecting discrete continually distributed rolling visco nonlinear elastic rheological elements presents the model of hybrid nonlinear system. the analytical solutions of first asy...
ABSTRACT In this paper, a nonlinear controller is designed for a wheeled mobile robot with three omnidirectional wheels. The omnidirectional wheel has an advantage of universal moving directions on a flat surface without changing its pose. The dynamics of the omnidirectional wheel includes rolling and slipping. Three configurations of mobile robots and an input-additive perturbation are conside...
In recent years, the fabrication of bulk materials with ultra fine grain sized materials processed by SPD methods. Different techniques have been used to introduce large plastic strains in to bulk metals such as Equal Channel Angular Pressing (ECAP) [1-3], Accumulative Roll Bonding (ARB) [4-7], Repetitive Corrugation and Straitening (RCS) [8,9], Constrained Groove Pressing (CGP) [5] and Constra...
American Petroleum Institute (API) specifications for line pipes include several steel grades with wide range of mechanical properties and chemical composition. Almost all, large diameter pipes produced in the Kingdom conform to these specifications and the present demand of this market segment reaches to about 300,000 tons annually. Until recently, all material used in the Kingdom under these ...
For the first time, we have a plausible and complete accounting of matter and energy in the Universe. Expressed a fraction of the critical density it goes like this: neutrinos, between 0. to the critical density (within the errors). This accounting is consistent with the inflationary prediction of a flat Universe and defines three dark-matter problems: Where are the dark baryons? What is the no...
in 2001, s. bulman-fleming et al. initiated the study of three flatness properties (weakly kernel flat, principally weakly kernel flat, translation kernel flat) of right acts $a_{s}$ over a monoid $s$ that can be described by means of when the functor $a_{s} otimes -$ preserves pullbacks. in this paper, we extend these results to$s$-posets and present equivalent descriptions of weakly kernel po...
Leukocyte capture and rolling are mediated by selectins expressed on leukocytes (L-selectin) and the vascular endothelium (Pand E-selectin). To investigate the role of core 2 b1-6-N-glucosaminyltransferase (C2GlcNAcT-I) for synthesis of functional selectin ligands in vivo, leukocyte rolling flux and velocity were studied in venules of untreated and tumor necrosis factor-a (TNFa)–pretreated auto...
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