نتایج جستجو برای: oxygen balance
تعداد نتایج: 346206 فیلتر نتایج به سال:
Four methods for determining substrate recoveries in studies concerned with the partition of substrate between sludge synthesis and respiration were investigated. An energy balance comparing chemical oxygen demand (COD) removed with the summation of oxygen uptake and the COD of the cells produced yielded average recoveries closer to 100% than any of the other three methods tested. The standard ...
Appropriate regulation of reactive oxygen species (ROS) has a significant impact on health and disease. ROS includes oxygen ions (O2̇) free radicals (superoxide [O, 2] and hydroxyl radicals), and peroxides (hydrogen peroxide [H2O2]) and are the products of normal oxygen consuming metabolic process in the body. ROS are small and highly reactive molecules with important cell signaling roles when m...
UNLABELLED Supplemental oxygen maintained during and for 2 h after colon resection halves the incidence of nausea and vomiting. Whether supplemental oxygen restricted to the intraoperative period is sufficient remains unknown. Similarly, the relative efficacy of supplemental oxygen and ondansetron is unknown. We tested the hypothesis that intraoperative supplemental oxygen reduces the incidence...
BACKGROUND The American Thoracic Society recommends that the inspired concentration used for the estimation of carbon monoxide transfer factor (TLCO) mixture should be 0.25-0.35% carbon monoxide, 10-14% helium, 17-21% oxygen, balance nitrogen. Inspired oxygen influences alveolar oxygen and hence carbon monoxide uptake, such that transfer factor increases by 0.35% per mm Hg decrease in alveolar ...
Oxidative stress Oxidative stress can be defined as an imbalance between the production of reactive oxygen species (ROS) in the body that disrupts its ability to detoxify reactive intermediates, or to repair the damage to organ and cellular systems that can be caused by ROS. Intracellular redox balance (the dynamic balance between oxidizing and reducing species within cells) is closely coupled ...
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