نتایج جستجو برای: blood vessels
تعداد نتایج: 711963 فیلتر نتایج به سال:
Reactive oxygen species have been implicated in the pathogenesis of virtually every stage of vascular lesion formation, hypertension, and other vascular diseases. We are currently gaining insight into important sources of reactive oxygen species in the vessel wall, including the NADPH oxidases, xanthine oxidase, uncoupled nitric oxide synthase, and mitochondrial sources. Although various reacti...
Background & Aims: Angiogenesis is a key event during tumor growth. Since tumor cells require more oxygen and glucose than normal cells and due to tumors quick growth, new blood vessels rapidly increase to meet the nutritional requirements. Hence, targeting and inhibiting the formation of new blood vessels can reduce the nutrition and access of tumor cells to oxygen, which also inhibits tumor g...
this paper presents a new procedure for automatic extraction of the blood vessels and optic disk (od) in fundus fluorescein angiogram (ffa). in order to extract blood vessel centerlines, the algorithm of vessel extraction starts with the analysis of directional images resulting from sub‑bands of fast discrete curvelet transform (fdct) in the similar directions and different scales. for this pur...
Introduction:Adenosine as a potent vasodilator has physiological role in regulation of regional cerebral blood flow (rCBF). Metod: Laser-Dِoppler flowmetry technique was used to study pial vessels blood flow responses to adenosine receptors agonists and antagonist. Male Sprague Dawley rats (250-350g) that were housed in standard conditions, were anesthetized with Urethane (1.5g/kg). Adenosine ...
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