نتایج جستجو برای: dissovled oxygen 8
تعداد نتایج: 846494 فیلتر نتایج به سال:
پیل سوختی میکروبی(mfc) شکل جدیدی از انرژی تجدید پذیر است.دراین پیل ها مواد آلی به عنوان سوخت مصرف می شوند وباازتجزیه مواد آلی توسط باکتریها انرژی الکتریکی تولید می شود.فاضلاب وپساب نیز می توانند به عنوان سوخت درپیل مصرف شوند وضمن تولید انرژی الکتریکی پساب نیز تصفیه می شود. در این تحقیق روند تولید انرژی وتصفیه شدن پساب با بررسی جریان،مقاومت ، ولتاژ پیل وآنالیز cod,tds,ec الکترولیت بررسی می شود. ...
BACKGROUND Assisted ventilation for extremely preterm infants (<28 weeks of gestation) has become less invasive, but it is unclear whether such developments in care are associated with improvements in short-term or long-term lung function. We compared changes over time in the use of assisted ventilation and oxygen therapy during the newborn period and in lung function at 8 years of age in child...
The oxygen transmission rate of a PET coated film showed 37-fold decrease using dispersion LDH nanosheets in polyvinyl alcohol that was prior aged for 8 weeks compared to the with equivalent freshly prepared LDH/PVA dispersion.
The Langley 8-Foot High-Temperature Tunnel (8-ft HTT) is used to test components of hypersonic vehicles for aerothermal loads de nition and structural component veri cation. The test medium of the 8-ft HTT is obtained by burning a mixture of methane-air under high pressure; the combustion products are expanded through an axisymmetric conical-contoured nozzle to simulate atmospheric ight at Mach...
The main purpose of this study was to investigate the effects of an 8-wk severe interval training program on the parameters of oxygen uptake kinetics, such as the oxygen deficit and the slow component, and their potential consequences on the time until exhaustion in a severe run performed at the same absolute velocity before and after training. Six endurance-trained runners performed, on a 400-...
BACKGROUND Classic teaching suggests that diminished availability of oxygen leads to increased tissue oxygen extraction yet evidence to support this notion in the context of hypoxaemia, as opposed to anaemia or cardiac failure, is limited. METHODS At 75 m above sea level, and after 7-8 days of acclimatization to 4559 m, systemic oxygen extraction [C(a-v)O2] was calculated in five participants...
INTRODUCTION Maintaining arterial blood glucose within tight limits is beneficial in critically ill patients. Upper and lower limits of detrimental blood glucose levels must be determined. METHODS In 69 patients with severe traumatic brain injury (TBI), cerebral metabolism was monitored by assessing changes in arterial and jugular venous blood at normocarbia (partial arterial pressure of carb...
BACKGROUND AND PURPOSE Cardiac arrest and resuscitation in immature piglets result in a delayed increase in blood-brain barrier permeability. We tested the hypothesis that pretreatment with oxygen radical scavengers reduces postischemic permeability. METHODS Permeability was assessed by measuring the plasma-to-brain transfer coefficient of the small amino acid, alpha-aminoisobutyric acid, in ...
BACKGROUND DNA is constantly exposed to reactive oxygen species (ROS), spontaneously arising during the normal oxygen metabolism. ROS may result in temporary as well as permanent modifications in various cellular components such as lipids, proteins and DNA, which may have deleterious consequences. Demonstrating that a dietary supplementation of antioxidants can reduce oxidative DNA damage may p...
BACKGROUND The objective of the present study was to investigate the effects of increasing doses of norepinephrine (NE) with or without arginine-vasopressin (AVP) on intestinal oxygen supply and jejunal mucosal tissue oxygen tension in an acute endotoxic pig model. METHODS In this prospective, randomized, experimental study on 24 domestic pigs, jejunal mucosal tissue PO2 (PO2muc) was measured...
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