نتایج جستجو برای: strain i 2
تعداد نتایج: 3472837 فیلتر نتایج به سال:
ررسی مینیماکس بودن و هم متناهی بودن مدول های کوهمولو‍ژی موضعی موضوع اصلی این رساله می باشد. در این راستا به بیان و اثبات چند قضیه می پردازیم. بدین منظور فرض کنید $r$ یک حلقه ی جابجایی و نوتری و $i$ ایده آلی از $r$ باشد. فرض کنید $m$ یک $-r$مدول ناصفر باشد. نشان می دهیم که $-n$ امین بعد متناهی برای هر $n in mathbb{n}_{circ}$ به صورت زیر می باشد: $$ f_{i}^{n}(m) := inf leftlb...
The damage and strain induced by irradiation of both relaxed and pseudomorphic Ge,Si,-, films on Si(100) with 100 keV 28Si ions at room temperature have been studied by MeV 4He channeling spectrometry and x-ray double-crystal diffractometry. The ion energy was chosen to confine the major damage to the films. The results are compared with experiments for room temprature Si irradiation of Si( 100...
The diarrheal mechanisms in Aeromonas enteritis are not completely understood. In this study we investigated the effect of aeromonads and of their secretory products on ion secretion and barrier function of monolayers of human intestinal cells (HT-29/B6). Ion secretion was determined as a short-circuit current (I(SC)) of HT-29/B6 monolayers mounted in Ussing-type chambers. Transepithelial resis...
Biopolymer gels exhibit strain stiffening that is generally not seen in synthetic gels. Here, we investigate the strain-stiffening behavior in collagen I gels that demonstrate elasticity derived from a variety of sources including crosslinking through telopeptides, bundling through low-temperature gelation, and exogenous crosslinking with genipin. In all cases, it is found that these gels exhib...
Net-Y is a new two-dimensional carbon structure, which has attracted research interest recently. Here, we study the relevant AB-type ribbons with edge modification, focusing on their strain controlling effects electronic structure and device characteristics. Intrinsic are metallic, but hydrogen or oxygen termination can transform them into semiconductors. Applying effectively control band gap s...
Rhythmic strain stimulates Caco-2 proliferation. We asked whether mitogen-activated protein kinase (MAPK) activation mediates strain mitogenicity and characterized upstream signals regulating MAPK. Caco-2 cells were subjected to strain on collagen I-precoated membranes or antibodies to integrin subunits. Twenty-four hours of cyclic strain increased cell numbers compared with static conditions. ...
Effects of ion implantation of 320 keV “Si at room temperature in pseudomorphic metastable Ge$i,-, (x-0.04, 0.09, 0.13) layers 170 nm thick grown on Si( 100) wafers were characterized by x-ray double-crystal diffractometry and MeV 4He channeling spectrometry. The damage induced by implantation produces additional compressive strain in the Ge$i, _ x layers, superimposed on the intrinsic compress...
BACKGROUND Evidence of an association between job strain and obesity is inconsistent, mostly limited to small-scale studies, and does not distinguish between categories of underweight or obesity subclasses. OBJECTIVES To examine the association between job strain and body mass index (BMI) in a large adult population. METHODS We performed a pooled cross-sectional analysis based on individual...
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