نتایج جستجو برای: helical port
تعداد نتایج: 51234 فیلتر نتایج به سال:
As neurons age, their survival depends on eliminating a growing burden of damaged, potentially toxic proteins and organelles-a capability that declines owing to aging and disease factors. Here, we review the two proteolytic systems principally responsible for protein quality control in neurons and their important contributions to Alzheimer disease pathogenesis. In the first section, the discove...
In recent years, anthropogenic and natural activities have caused high levels of metal contamination into the aquatic ecosystem. These pollutants can accumulate in the food chain. The present study examined the amount of metals such as lead ,Nickel, Zink, Copper and Iron in the muscle tissue of Silago Sihama because of their importance in three regions of the Hormozgan province.Sampling was don...
In this paper, we have investigated the effects of self-fields on gain in a helical wiggler free electron laser with axial magnetic field and ion-channel guiding. The self-electric and self-magnetic fields of a relativistic electron beam passing through a helical wiggler are analyzed. The electron trajectories and the small signal gain are derived. Numerical investigation is shown that for grou...
Acquired port-wine stain is a rare vascular lesion that mimics a congenital port-wine stain clinically and histologically, but is acquired after birth. A survey on more than 60 reported cases in the literature reveals that most of these cases are idiopathic, but some of the cases developed after physical or mechanical trauma, hormonal changes, chronic sun exposure, and medications (OCP, i...
Asaluyeh Fishery Port is an old fishery port located in the south-east of the Bushehr Province. The rapid shoreline advancement of the updrift fillet of the main breakwater during past few years and the sedimentation at the port entrance has resulted to substantial difficulties in using the port. The relatively large amount of sedimentation finally affected the navigation at the entrance of the...
In this paper, a non-isolated multi-port zero-voltage-switching bidirectional dc-dc converter is proposed. Free ripple condition of input currents is obtained by using coupled inductors in any stages. Proposed converter is analyzed as a five port converter. It is possible to increase number of input sources up to as a kind of port converter. The proposed converter can be used in both boost and ...
Objectives- Recording intraoperative cardiorespiratory events in thoracoscopic total pericardiectomy via transdiaphragmatic camera port in dog to evaluate feasibility and risks of mechanical stimulation of pherenic nerve during this surgical approach.Design- Technical assessment, experimental study.Animals- Nine healthy, male mixed breed dogs.Procedures- Under one lung ventilation inhalation ge...
this paper presents a three-dimensional numerical investigation carried out in turbulent forced convection in a tube with helical ribs. enhancement of heat transfer using helically corrugated tubes has beenstudied experimentally by many researchers but there exist a few published numerical analyses results. the paper also introduces the results of heat transfer and friction factor data for inco...
the area of musa bay (khor musa) on which two vital and important ports of imam khomeini (port shapour) and mahshar have taken place on its shore is located geographically at the far northeast of the persian gulf, south of khuzestan province. early in the world war ii, despite iran’s neutral declaration, port shapour was blitzed and occupied by british navy on august 24, 1941. iran's resis...
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