نتایج جستجو برای: selective pressure
تعداد نتایج: 597019 فیلتر نتایج به سال:
Animals exploit flow phenomena by manipulating their habitat or secreting complex fluids as survival strategies in response to constant selective pressure.
بررسی تاثیر دو مانور ثبات دهنده شکمی (گود کردن و سفت کردن شکم) با استفاده از pressure biofeedback روی میزان فعالیت بدست آمده از سیگنال الکترومیوگرافی عضلات اکستانسور ناحیه کمری ـ لگنی در حین انجام اکستنشن هیپ در وضعیت دمر در زنان سالم و مبتلا به کمردرد مزمن غیر اختصاصی.
To determine which subtype of alpha1-adrenergic receptors plays a role in the regulation of blood pressure, with alpha1A-adrenergic receptor-mediated vasoconstriction in perfused hindlimb as a control, we compared the inhibitory effects of various alpha1-adrenergic receptor selective antagonists on the vasopressure responses to phenylephrine between the mean arterial pressure and hindlimb perfu...
A piezochromic material exhibiting a pressure dependent reversible shift of the selective reflection wavelength via the entire visible range is developed. The material consists of a cholesteric mixture embedded in a cholesteric elastomer matrix bearing mesogenic side chains with similar molecular structure. The change of the selective reflection has its origin in a compressible helix structure....
Higher levels of tourniquet pressure and higher pressure gradients beneath tourniquet cuffs are associated with a higher risk of nerve-related injury. Measurement of limb occlusion pressure can help to minimize tourniquet pressure levels and pressure gradients for individual patients and individual surgical procedures. Selective use of pneumatic, wider, and contoured tourniquet cuffs reduces to...
Both the physiological role of muscarinic receptors for bladder function and the therapeutic efficacy of antimuscarinic agents for overactive bladder syndrome are well documented. We investigated the effect of antimuscarinic agents with different subtype selectivity on urodynamic parameters in nonhuman primates and rodents and compared plasma levels of these agents between species. Anesthetized...
A selective reduction of a broad variety of ketones is described. The method is based on the combination of a Ni-Al alloy and high hydrostatic pressure (HHP, 2.8 kbar) in an aqueous medium. The reaction of the Ni-Al alloy with water provides in situ hydrogen generation and the high pressure ensures that the H(2) formed remains in the solution, thus the C=O reduction readily occurs. The applicat...
BACKGROUND Vaccines constitute a unique selective pressure, different from natural selection, drives the evolution of influenza virus. In this study, A/Chicken/Shanghai/F/1998 (H9N2) was continually passaged in specific pathogen-free embryonated chicken eggs with or without selective pressures from antibodies induced by homologous maternal antibodies. Genetic mutations, antigenic drift, replica...
BACKGROUND/AIMS Selective laser trabeculoplasty targets the pigmented trabecular meshwork cells without damage to the trabecular meshwork architecture in vitro. A study was conducted in vivo of eight eyes with uncontrolled open angle glaucoma to ascertain the immediate intraocular response to selective laser trabeculoplasty. METHODS The trabecular meshwork of each eye was treated 360 degrees ...
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