نتایج جستجو برای: نظریه اربیتال های طبیعی nbo
تعداد نتایج: 504745 فیلتر نتایج به سال:
OBJECTIVE To define non-bacterial osteitis (NBO) as a clinical entity possibly associated with autoimmune manifestations. Patients with sterile osteitis were analysed to develop diagnostic criteria. METHODS A total of 89 patients with non-bacterial inflammatory bone lesions were observed for a median of 49 months. History, diagnostic imaging, laboratory and histological data were obtained. Mu...
PURPOSE To investigate the efficacy of normobaric oxygen (NBO) therapy for treatment of scleral ischemia or melt. METHODS This prospective interventional case series includes 9 eyes of 8 patients with scleral ischemia or melt of diverse etiologies. Following the failure of conventional medical and/or surgical therapy to improve ischemia or upon clinical deterioration, NBO was initiated. All p...
BACKGROUND AND PURPOSE Normobaric hyperoxia (NBO) has been shown to exert neuroprotective effects against cerebral ischemia and to restore penumbral oxygenation. Inspired by recent reports on postconditioning with intermittent occlusions of cerebral artery, we tested the hypothesis that intermittent NBO (iNBO) may cause oscillation of cerebral oxygenation and thereby elicit repetitive interrupt...
BACKGROUND Hyperbaric oxygenation has been used for various purposes, but its clinical application is limited due to its pulmonary toxicity. We evaluated the therapeutic value of normobaric hyperoxygenation (NBO) for vascularized and nonvascularized tissue transplantation. METHODS Tissue oxygen partial pressure (PtO2) was measured for various organs in mice under inspiratory oxygen of 20%, 60...
We present a comprehensive molecular dynamics (MD) simulation study of composition-structure trends in a set of 25 glasses of widely spanning compositions from the following four systems of increasing complexity: Na2O-B2O3, Na2O-B2O3-SiO2, Na2O-CaO-SiO2-P2O5, and Na2O-CaO-B2O3-SiO2-P2O5. The simulations involved new B-O and P-O potential parameters developed within the polarizable shell-model f...
BACKGROUND The use and benefits of normobaric oxygen (NBO) in patients suffering acute ischemic stroke is still controversial. RESULTS Here we show for the first time to the best of our knowledge that NBO reduces both NMDA-induced calcium influxes in vitro and NMDA-induced neuronal degeneration in vivo, but increases oxygen and glucose deprivation-induced cell injury in vitro and ischemia-ind...
PURPOSE Mapping brain hypoxia is a major goal for stroke diagnosis, pathophysiology and treatment monitoring. 18F-fluoro-misonidazole (FMISO) positron emission tomography (PET) is the gold standard hypoxia imaging method. Normobaric hyperoxia (NBO) is a promising therapy in acute stroke. In this pilot study, we tested the straightforward hypothesis that NBO would markedly reduce FMISO uptake in...
Up to now, over 1,000 experimental treatments found in cells and rodents have been difficult to translate to human ischemic stroke. Since ischemia and reperfusion, two separate stages of ischemic stroke, have different pathophysiological mechanisms leading to brain injury, a combination of protective agents targeting ischemia and reperfusion respectively may obtain substantially better results ...
چکیده در این تحقیق، قدرت پیوند هیدروژنی درون مولکولی 1و5-دی هیدروکسی آنتراکینون(1,5dha) ، با استفاده از محاسبات نظریه ی تابعی چگالی (dft) ، تئوری اتم ها در مولکول (aim) و آنالیز اوربیتال طبیعی پیوند (nbo) مورد بررسی قرار گرفت. بهینه سازی ساختارها و مشاهده ی فرکانس های ارتعاشی در سطح b3lyp/6-311++g** انجام شد. نتایج ساختاری، فرکانس پیوند o•••h، جابه جایی شیمیایی پروتون انولی و خواص توپولوژیکی ...
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