The phrase "availability of oxygen or" is correct and usable in written English.
It can be used in contexts discussing environmental conditions, biological processes, or scientific research where oxygen levels are relevant.
Example: "The survival of marine life is heavily influenced by the availability of oxygen or other essential nutrients in the water."
Alternatives: "presence of oxygen or" or "supply of oxygen or".
The impact of infections is often aggravated under particular environmental conditions, such as extreme temperatures or limited availability of oxygen or nutrients.
The mechanisms of microbial arsenic mobilization depend on many biogeochemical factors, among which the most important seem to be the following: the presence of the appropriate physiological group of microbes, type of minerals (primary or secondary), pH (acidic or neutral), Eh (reductive or oxidative conditions), and the availability of oxygen or other electron acceptors.
This facultative bacterium is capable of either aerobic or anaerobic respiration, depending on the availability of oxygen (O2) or alternative electron acceptors.
These changes include increased consumption of oxygen by residential or recruited inflammatory cells, and diminished availability of oxygen due to thrombosis or inflammation of the vascular support system, resulting in profound hypoxia [6] [8].
Interestingly, expression of arcA was hardly influenced by the availability of oxygen at either the transcriptional or protein product levels.
The differences measured in this study might, therefore, be due to differences in the relative expression levels of Hmp, the availability of oxygen for the denitrosylase reaction, or perhaps different contributions of alternative NO detoxification mechanisms, such as the NO reductase NorVW (41).
We conclude that the major radiobiological consequence of thiol manipulation in multicell systems is to increase or decrease the availability of oxygen.
The reduction of pyruvate despite the availability of oxygen is known as the Warburg effect or aerobic glycolysis and has been shown to decrease mitochondrial respiration, mitochondria-derived ROS and apoptosis [ 66, 67].
Hypobaric hypoxia (HH), or altitude, produces the hypoxic effect (decrease the availability of oxygen in the tissues) by reducing the barometric pressure, mainly by ascent to altitude or by using hypobaric chambers.
Proposed killing mechanisms include: changes in salinity; poisoning by chemicals such as hydrogen sulfide or methane; changes in the availability of oxygen; and changing consistency of the sea floor.
It may therefore be that their rapid evolution reflects the requirement for fast adaptation of regulation of the respiratory chain in response to organismal pressures or to variations in the availability of oxygen.
