نتایج جستجو برای: 168 to 392 micron
تعداد نتایج: 10619356 فیلتر نتایج به سال:
مقدمه: پژوهش حاضر باهدف بررسی ویژگی های روان سنجی (روایی و پایایی) مقیاس نیاز به شناخت در میان دانشآموزان پایه سوم دبیرستان انجام شد. روش: برای این منظور 392 نفر (168 پسر و 224 دختر) از دانشآموزان پایه سوم دبیرستان های شهر شیراز به روش نمونه گیری خوشه ای چندمرحله ای انتخاب و به پرسشنامه خود گزارشی نیاز به شناخت (ncs) کاچیوپو و همکاران پاسخ دادند. برای بررسی روایی سازه این مقیاس از روش تحلیل ع...
A scanning electron microscope (SEM) autoradiographic technique was calibrated and used to determine the site density of acetylcholine receptors within 250 micron of the neuromuscular junction in innervated as well as 3- and 10-d denervated sternomastoid muscle of the mouse. In all these groups sharp gradients of receptor site density are seen around the endplates in the first 2-7 micron, conti...
Cells change shape in response to diverse environmental and developmental conditions, creating topologies with micron-scale features. Although individual proteins can sense nanometer-scale membrane curvature, it is unclear if a cell could also use nanometer-scale components to sense micron-scale contours, such as the cytokinetic furrow and base of neuronal branches. Septins are filament-forming...
The metabolic and growth inhibitory effects of adenosine toward the human lymphoblast line WI-L2 were potentiated by the adenosine deaminase inhibitors erythro-9-(2-hydroxy-3-nonyl) adenine (EHNA) and coformycin. EHNA, 5 micron, or coformycin, 3.5 micron, at concentrations that inhibited adenosine deaminase activity more than 90% had little effect on cell growth or the metabolic parameters stud...
We describe the visualization of the barrel cortex of the primary somatosensory area (S1) of ex vivo adult mouse brain with short-tracks track density imaging (stTDI). stTDI produced much higher definition of barrel structures than conventional fractional anisotropy (FA), directionally-encoded color FA maps, spin-echo T1- and T2-weighted imaging and gradient echo T1/T2*-weighted imaging. 3D hig...
The circular musculature of the guinea-pig ileum has been studied by freeze-fracture to analyze quantitatively the gap junctions (nexuses) between its smooth muscle cells. The average cell surface area and cell volume are 5,074 micron 2 and 3,260 micron 3. The packing density of nexuses is 48/1,000 micron 2 of cell surface or approximately 244/muscle cell. Nexuses range in area from less than 0...
The tracheae of ferrets and rabbits were mounted in vitro in organ baths. While the tracheae were liquid filled, the permeability coefficient ( P) was determined, and then while the tracheae were air filled, the percent clearance for 99mTc-labeled diethylenetriaminepentaacetic acid (DTPA) was determined. The thickness of airway surface liquid (ASL) was estimated by three methods. 1) The initial...
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