Loading...
  • reactive oxygen
  • Late Pregnancy Antioxidants such as carotenoids, vitamin C, Vitamin E, and enzymes such as superoxide dismutase (SOD) and glutathione peroxidase (GPx) can protect against reactive oxygen species that damage DNA, proteins and lipids, and result in cell senescence and death. (wikipedia.org)
  • diver
  • underwater diving using self contained breathing gas recycling apparatus Rebreather diving is underwater diving using rebreathers, which recirculate the breathing gas already used by the diver after replacing oxygen used by the diver and removing the carbon dioxide metabolic product. (wikipedia.org)
  • At shallow depths, a diver using open-circuit breathing apparatus typically only uses about a quarter of the oxygen in the air that is breathed in, which is about 4 to 5% of the inspired volume. (wikipedia.org)
  • As the diver goes deeper, much the same mass of oxygen is used, which represents an increasingly smaller fraction of the inhaled gas. (wikipedia.org)
  • When that breath is exhaled back into the surrounding environment, it has an oxygen level in the range of 15 to 16% when the diver is at atmospheric pressure. (wikipedia.org)
  • demands
  • Interval training in severely disabled COPD patients is associated with stable metabolic demands, (23) low minute ventilation and rates of dynamic hyperinflation, and increased total exercise duration than that of constant-load exercise. (thefreedictionary.com)
  • Nitrogen
  • The International Space Station (ISS) requires stores of Oxygen (O2) and Nitrogen (N2) to provide for atmosphere replenishment, direct crew member usage, and payload operations. (sae.org)
  • The remaining oxygen is exhaled along with nitrogen and carbon dioxide - about 95% of the volume. (wikipedia.org)
  • helium
  • Behnke refers to early work by Momsen on "partial pressure vacancy" (PPV) where he used partial pressures of oxygen and helium as high as 2-3 ATA to create a maximal PPV. (wikipedia.org)
  • The economy of gas consumption is also useful when the gas mix being breathed contains expensive gases, such as helium. (wikipedia.org)
  • response
  • The goal of this study was to investigate the effect of metabolic-targeting through HIF-1α inhibition and the associated changes in glycolysis, oxygen consumption and response on the efficacy of high-dose single-fraction radiotherapy (HD-SFRT). (biomedcentral.com)
  • Replicative aging has been linked to the retrograde response, which is activated by an intracellular signalling pathway from the mitochondrion to the nucleus and leads to the transcription of several genes encoding for metabolic enzymes. (wiley.com)
  • Neonates have a metabolic response to cooling that involves chemical (nonshivering) thermogenesis by sympathetic nerve discharge of norepinephrine in the brown fat. (merckmanuals.com)
  • energy
  • Activating the immune system has the present and future benefit of clearing infections, but it is also both expensive in regard to present high metabolic energy consumption, and in the risk of resulting in a future immune related disorder. (wikipedia.org)
  • rates
  • Uroderma bilobatum support flight with some of the fastest metabolic incorporation rates and dynamic circulating cortisol in vertebrates. (elifesciences.org)
  • chamber
  • HIF-1α wild-type and HIF-1α knockdown FaDu and ME180 xenograft tumors were grown in the hind leg of mice that were placed in an environmental chamber and exposed to different oxygen conditions (air-breathing and hypoxia). (biomedcentral.com)
  • respiration
  • The measured effects were that muscles of respiration were strengthened, the heart was strengthened, blood pressure was sometimes lowered and the total amount of blood and number of red blood cells increased, making the blood a more efficient carrier of oxygen. (wikipedia.org)
  • breath
  • Since only a small part of the oxygen, and virtually none of the inert gas is consumed, every exhaled breath from an open-circuit scuba set represents at least 95% wasted potentially useful gas volume, which has to be replaced from the breathing gas supply. (wikipedia.org)
  • A breath inhaled from an open circuit scuba system whose cylinders are filled with ordinary air is about 21% oxygen. (wikipedia.org)
  • widely
  • Singlet oxygen ( 1 O 2 ) is widely believed to be the major cytotoxic agent involved in photodynamic therapy (PDT). (aacrjournals.org)
  • enough
  • Animals must balance between generating enough metabolic power to find and acquire food and maintaining sufficient reserves to sustain daily maintenance, and repair and reproduce. (elifesciences.org)
  • result
  • The brain is relatively poorly supplied by oxygen as a result of mild hypoventilation during the sleeping hours, and also cerebral edema may worsen during the night due to the lying position. (wikipedia.org)
  • cardiovascular
  • Several large-scale population studies have linked increased green tea consumption with significant reductions in metabolic syndrome - a cluster of clinical symptoms which include insulin resistance or hyperinsulinemia (high levels of circulating insulin), Type 2 Diabetes , hypertension or high blood pressure , cardiovascular disease including coronary heart disease and atherosclerosis . (lchf-rd.com)
  • lungs
  • It is caused by a reduced level of oxygen, mechanical disorders (where the lungs aren't able to expand as they should, usually due to a build-up of fluid in or around the lungs), and physiological disorders in which the cat's respiratory centre in the brain is over stimulated. (cat-world.com.au)
  • The three methods of oxygen intake are via the skin (the primary source), lungs, and buccal cavity. (wikipedia.org)
  • assess
  • 33 In vitro experimentation was conducted in H. pylori-infected gastric epithelial cells with 24 medicinal plants indigenous to Pakistan to evaluate their effect on secretion of interleukin (IL)-8 and generation of reactive oxygen species (ROS) in order to assess anti-inflammatory and cytoprotective effects. (drugs.com)
  • conditions
  • In comparison, that of rats is 6.02 mg g−1 h−1 and humans 2.61 mg g−1 h−1.Table 1 The oxygen for this in low oxygen conditions comes from gulping air at the water surface. (wikipedia.org)
  • Newts consequently have external gills at birth that persist until metamorphosis, which assists survival in low-oxygen conditions. (wikipedia.org)
  • Indeed, the reactions that constitute glycolysis and its parallel pathway, the pentose phosphate pathway, occur metal-catalyzed under the oxygen-free conditions of the Archean oceans, also in the absence of enzymes. (wikipedia.org)
  • products
  • Other methods used to preserve fish and fish products include the control of temperature using ice, refrigeration or freezing the control of water activity by drying, salting, smoking or freeze-drying the physical control of microbial loads through microwave heating or ionizing irradiation the chemical control of microbial loads by adding acids oxygen deprivation, such as vacuum packing. (wikipedia.org)
  • water
  • This is because oxygen molecules do not readily dissolve in water, and as T. carnifex is an immobile animal, extracting oxygen from water is difficult. (wikipedia.org)
  • In aquaculture, holding basins are used where the water is continuously filtered and its temperature and oxygen level are controlled. (wikipedia.org)
  • Live fish can be transported by methods which range from simple artisanal methods where fish are placed in plastic bags with an oxygenated atmosphere, to sophisticated systems which use trucks that filter and recycle the water, and add oxygen and regulate temperature. (wikipedia.org)
  • body
  • D+ET similarly reduced body weight (6.2±0.7 and 7.0±0.8 kg, P=0.47), abdominal circumference (5.6±1.2 and 5.4±1.0 cm, P=0.91), systolic (11±3 vs. 13±3 mmHg, P=0.62) and diastolic BP (8±2 vs. 8±1 mmHg, P=0.95), and similarly increased peak oxygen consumption (21±7 and 20±7%, P=0.90) in both groups. (ahajournals.org)
  • main
  • There are numerous secondary filaments along with the main filaments, which are lengthened to extend the oxygen-catching capability. (wikipedia.org)
  • primary
  • The Cis-Lunar Mark VI rebreather employs many revolutionary design elements, such as discarding the customary three oxygen sensors and their voting logic in favor of a primary oxygen sensor with constant auto-cell validation and auto-calibration through the entire dive envelope, with a secondary oxygen sensor for redundancy. (wikipedia.org)