نتایج جستجو برای: iri
تعداد نتایج: 2454 فیلتر نتایج به سال:
چگالی الکترونی لایه یونسفر، اطلاعات با ارزشی از شرایط فیزیکی این لایه از اتمسفر را فراهم می کند. انتشار امواج الکترومغناطیس در لایه یونسفر تحت تأثیر الکترون های آزاد این محیط می باشد. در نتیجه مدل سازی یونسفر در بسیاری از زمینه ها از قبیل ارتباطات مخابراتی، ناوبری و تعیین موقعیت ماهواره ای، سیستم های راداری و سایر فناوری های فضایی مورد توجه می باشد. مدل های تجربی از قبیل مدل iri صرفاً یک پیش بین...
Objective(s): Hepatic ischemia/reperfusion injury (IRI) is one of the major causes of hepatic failure during liver transplantation, trauma, and infections. The present study investigated the protective effect of intra-portal administration of 2-methoxycinnamaldehyde (2-MCA) on hepatic IRI in rats. Materials and Methods: Twenty-four rats ...
Red clover (Trifolium pratense L.) is used as a source for isoflavone (IF) dietary supplements. In this study, we focused on the red clover IF irilone (IRI), because of its reported comparatively high bioavailability. Because the conjugative metabolism plays a key role in the elimination of IF, we investigated the species-specific differences and glucuronidation kinetics of IRI using different ...
objective(s):there are a few previously reported studies about the effect of nigella sativa oil on renal ischemia-reperfusion injury (iri). the aim of the present study was to test the hypothesis whether pre- or post-treatment with n. sativa hydroalcoholic extract (nse) would reduce tissue injury and oxidative damages in a clinically relevant rat model of renal iri. materials and methods: ir...
Kidney ischemia and reperfusion injury (IRI) is associated with a high mortality rate, which is attributed to tubular oxidative and nitrative stresses; however, an effective approach to limit IRI remains elusive. Spermidine, a naturally occurring polyamine, protects yeast cells against aging through the inhibition of oxidative stress and necrosis. In the present study, spermidine supplementatio...
Ischemia-reperfusion injury (IRI) is a major contributor to acute kidney injury (AKI). At present, there are no effective therapies to prevent AKI. The aim of this study was to analyse whether valproic acid (VPA), a histone deacetylase inhibitor with anti-inflammatory properties, prevents renal IRI. Male Wistar rats were divided into three groups: SHAM rats were subjected to a SHAM surgery, IRI...
PURPOSE Retinal ischemia induces apoptosis leading to neurodegeneration and vision impairment. Carbon monoxide (CO) in gaseous form showed cell-protective and anti-inflammatory effects after retinal ischemia-reperfusion-injury (IRI). These effects were also demonstrated for the intravenously administered CO-releasing molecule (CORM) ALF-186. This article summarizes the results of intravitreally...
OBJECTIVE To investigate the course of tubular cell senescence and expressions of p53, p21, and Rb during the late phase of ischemia/reperfusion (IRI) in the kidney, and assess the effects of the p53-Rb pathway on tubular cell senescence. METHODS Experimental models of unilateral renal IRI were used in p53 (+/+) and p53 (-/-) mice. Histological changes at the tubular level, progress of cell s...
During aortic surgery, interruption of spinal cord blood flow might cause spinal cord ischemia-reperfusion injury (IRI). The incidence of spinal cord IRI after aortic surgery is up to 28%, and patients with spinal cord IRI might suffer from postoperative paraplegia or paraparesis. Spinal cord IRI includes two phases. The immediate spinal cord injury is related to acute ischemia. And the delayed...
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