نتایج جستجو برای: pressure loss
تعداد نتایج: 836265 فیلتر نتایج به سال:
This paper presents a CFD model of reverse-flow extended-tube muffler which is analyzed by a set of experimental tests, in order to acquire the relations between the structure and its corresponding pressure loss; a lot of research have been done through the numeric simulation. For the specific model, the distance from inlet pipe’s rear to the end cap has a large impact on the pressure loss, fur...
Controversy continues as to whether uncontrolled or controlled hemorrhage is the most appropriate for the study of hemorrhagic shock and resuscitation. To appraise differences between these models, we evaluated the relationship between blood volume loss and blood pressure in controlled versus uncontrolled hemorrhage. Anesthetized, instrumented, immature female pigs (40 kg) were assigned to one ...
Introduction & Objective: By prevention of bleeding during spine surgery, we could provide suitable field for the surgeon and also reduce blood loss and the need for transfusion. The purpose of this study was to compare the effects of intravenous administration of propofol and isoflurane for anesthesia maintenance on the amount of blood loss and hemodynamic status during the surgery. Materials ...
Introduction: Sudden sensorineural hearing loss (SSNHL) is an important otological emergency. Up to 90% of the cases are idiopathic. Cerebral venous thrombosis (CVT) is an extremely rare identifiable cause as it only represents 0.5% of all strokes. Case Report: In this paper, an unusual case of bilateral SSNHL secondary to bilateral CVT with rapid and complete recovery is reported. The patie...
Purpose: The present study was designed to investigate the effect of hydrostatic pressure on cell viability, apoptosis induction, morphology and cell-substrate interactions of PC12 cells. Materials and Methods: PC12 as a neuronal cell line maintained in RPMI 1640 culture medium supplemented with 10% fetal bovine serum. PC12 cells were subjected to hydrostatic pressure. Experimental pressure con...
Loss of hydraulic conductivity occurs in stems when the water in xylem conduits is subjected to sufficiently negative pressure. According to the air-seeding hypothesis, this loss of conductivity occurs when air bubbles are sucked into water-filled conduits through micropores adjacent to air spaces in the stem. Results in this study showed that loss of hydraulic conductivity occurred in stem seg...
Introduction: The term glaucoma refers to a group of diseases that have a characteristic optic neuropathy with associated visual field loss in common. Intraocular pressure has been considered to be the only causal factor for glaucoma and the only factor that can be manipulated to alter the course of the disease. But considering high intraocular pressure as the only factor responsible for glauco...
PURPOSE To identify progressive rim loss and describe patterns of regional change in various clinical presentations of glaucoma by scanning laser tomography (SLT). METHODS A previously described analytical approach was used to identify progressive rim area loss in SLT disc images of eyes of people with ocular hypertension (OHT, n = 97), early POAG (OHT converters; n = 30), asymmetric normal-p...
noise-induced hearing loss, which is one of the 10 leading occupational diseases, is a debilitating and irreversible disease. during the recent 15-years period (1997-2012), several studies have investigated the association between noise, hearing damage and other side effects of noise in iran. the aim of this study was to review systematically the relevant literature related to noise-induced hea...
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