نتایج جستجو برای: imposed strain
تعداد نتایج: 253056 فیلتر نتایج به سال:
Contractile properties of rabbit tibialis anterior muscles were measured after eccentric contraction to investigate the mechanism of muscle injury. In the first experiment, two groups of muscles were strained 25% of the muscle fiber length at identical rates. However, because the timing of the imposed length change relative to muscle activation was different, the groups experienced dramatically...
The concept and realization of family gender issues in socialist Poland was generally a contested topic. had remained core institution society—and yet, it underwent significant transformation due to changing life-style models social expectations. In the late 1960s, crisis officially acknowledged, as new expectations increasingly conflicted with shortage economic resources, systemic limitations....
Close-packed monolayers self-assembled from ligated nanoparticles can form 10 nm thin sheets that stretch over micrometer-wide holes. Employing electron and focused ion beams, we show that one can locally tailor the strain in such sheets while they remain clamped around their perimeter, making it possible to imprint strain fields by design. Furthermore, using the nanoparticles themselves to tra...
Biaxial compressive strain has been used to markedly enhance the ferroelectric properties of BaTiO3 thin films. This strain, imposed by coherent epitaxy, can result in a ferroelectric transition temperature nearly 500 degrees C higher and a remanent polarization at least 250% higher than bulk BaTiO3 single crystals. This work demonstrates a route to a lead-free ferroelectric for nonvolatile mem...
اثر برخی از کودهای زیستی در تلفیق با کودهای شیمیائی و آلی بر عملکرد علوفه سورگوم (sorghum bicolor l)
به منظور بررسی اثر باکتری های محرک رشد در تلفیق با کودهای شیمیایی و آلی بر عملکرد کمی و کیفی سورگوم رقم پگاه، آزمایشی به صورت طرح بلوک کامل تصادفی با سه تکرار طی فصل زراعی 91-90 در موسسه تحقیقات برنج رشت انجام شد. تیمارهای مورد استفاده، بدون کود و بدون تلقیح (شاهد)، استفاده از کود شیمیایی و بدون تلقیح، تلقیح بذر باpseudomonas fluorescens strain 12 +azotobacter chroococcum strain 41 + بدون کود ش...
pah ها هیدروکربن های آروماتیکی هستند که از دو یا چند حلقه بنزنی تشکیل شده اند. این ترکیبات دارای منشا انسانی و طبیعی می باشند و بدلیل گستردگی حضور، پایداری، قابلیت تجمع زیستی و فعالیت سرطانزایی به یک نگرانی مهم زیست محیطی تبدیل شده اند. گرچه pahها دستخوش فرآیند های جذب سطحی، تبخیر، تجزیه نوری و تجزیه شیمیایی می شوند اما تجزیه میکروبی اصلی ترین فرآیند حذف این ترکیبات از محیط است. در کشورهای رو ب...
Since tubes are widely used for different industrial applications, processing of tubes by the Severe Plastic Deformation (SPD) method has been the target of different attempts. Among these attempts, development of SPD processes for tubes based on Equal Channel Angular Pressing (ECAP) has been more successful. As an illustration, Tube Channel Pressing (TCP) has been presented as an attractive SP...
Fluctuating forces imposed on the airway smooth muscle due to breathing are believed to regulate hyperresponsiveness in vivo. However, recent animal and human isolated airway studies have shown that typical breathing-sized transmural pressure (Ptm) oscillations around a fixed mean are ineffective at mitigating airway constriction. To help understand this discrepancy, we hypothesized that Ptm os...
Effect of Mean Stress on Low-Cycle Fatigue Strength of a Medium Carbon Steel S45C True Stress-Controlled Cyclingby Tatsuo ENDO*, Shoji HARADA*, Yoshihiro FUKUSHIMA* and Haruo SAKAMOTO** Nominal stress-controlled low-cycle fatigue life under imposed mean stress is affected by elongation or contraction due to cyclic stress-induced creep. Therefore, the effect of mean stress was examined by a micr...
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