Sentences with phrase «oxygen tension»
Oxygen tension refers to the amount or level of oxygen present in a certain area or environment. It measures the concentration of oxygen molecules in a particular space, indicating how much oxygen is available for cells or organisms to use for various biological processes. Full definition
Similarly, certain mtDNA variants are enriched in Tibetan populations, suggesting that mtDNA variation may permit adaptation to the low oxygen tension at high altitude.
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Fluctuating oxygen tensions in tumors could lead to reoxygenation - induced DNA damage and potentially increased genomic instability [45].
What is the effect of fluctuating oxygen tension on tumor progression?
This water photolysis must have happened to the primordial Earth, with loss of Hydrogen to space but it was stopped, as it is today, by the presence of ozone (O3) which requires high oxygen tension to form and it quickly reoxidises hydrogen via OH hydroxyls back to water.
«The ways we currently have to measure oxygen tension are fairly cumbersome and not quantitative, so no one really uses them.»
Enhanced dopaminergic differentiation of human neural stem cells by synergistic effect of Bcl - xL and reduced oxygen tension
Effects of intracellular pH, blood, and tissue oxygen tension on T1rho relaxation in rat brain.
When oxygen tension is low, p.acnes is stimulated to manufacture a compound called porphyrin that react with oxygen to create reactive oxygen species, or free radicals.
After parturition and the onset of breathing, pulmonary vascular resistance falls, flow in the ductus reverses, and the resulting rise in arterial oxygen tension inhibits local prostaglandin release causing constriction of the vascular smooth muscle within the vessel wall and functional closure of the ductus arteriosus3.
«The decrease in oxygen tension here causes the pulmonary arteries to constrict,» Dr. Sanderson says.
Thus, Rho - kinase inhibition at low oxygen tension can be regarded as a potential way to enhance extracellular matrix production and maintain a chondrocyte phenotype in cell - based tissue engineering applications.
Hypoxic conditions were used to model the oxygen tension present in healthy cartilage tissue.
Oxygen tension, as simple as it sounds, is a good measure of what's happening in a tumor,» Cima says.
Viewed in this way, environmental exposures include temperature, radiation, hydration and tonicity, oxygen tension, micro and macronutrients, infective agents and parasitism, and toxins.
When a skin pore fills up with sebum and dead skin cells, the oxygen tension falls slightly, to a level that's optimal for p.acnes to grow.
The bacteria still has the sebum and low oxygen tension it needs and will keep regenerating.
When your skin pores get full of sebum and skin cells it alters the oxygen tension, allowing bacteria (p. acnes) to flood in and breed.
The transducer is frequently part of a machine that can also monitor heart rate, respiratory rate, oxygen tension, etc..