Results 1 to 10 of about 5,619,512 (422)

On the maximum value of the cosmic abundance of oxygen and the oxygen yield [PDF]

open access: yesMon.Not.Roy.Astron.Soc.376:353-360,2007, 2007
We search for the maximum oxygen abundance in spiral galaxies. Because this maximum value is expected to occur in the centers of the most luminous galaxies, we have constructed the luminosity - central metallicity diagram for spiral galaxies, based on a large compilation of existing data on oxygen abundances of HII regions in spiral galaxies.
Allende Prieto   +68 more
arxiv   +3 more sources

Hydrogen/nitrogen/oxygen defect complexes in silicon from computational searches [PDF]

open access: yesPhys. Rev. B 80, 144112 (2009), 2009
Point defect complexes in crystalline silicon composed of hydrogen, nitrogen, and oxygen atoms are studied within density-functional theory (DFT). Ab initio Random Structure Searching (AIRSS) is used to find low-energy defect structures. We find new lowest-energy structures for several defects: the triple-oxygen defect, {3O}, triple oxygen with a ...
Andrew J. Morris   +3 more
arxiv   +3 more sources

Acknowledgment to the Reviewers of Oxygen in 2022

open access: yesOxygen, 2023
High-quality academic publishing is built on rigorous peer review [...]
Oxygen Editorial Office
doaj   +1 more source

The Oxygen–Ozone Adjunct Medical Treatment According to the Protocols from the Italian Scientific Society of Oxygen–Ozone Therapy: How Ozone Applications in the Blood Can Influence Clinical Therapy Success via the Modulation of Cell Biology and Immunity

open access: yesBiology, 2023
Background. Ozone is an allotrope of oxygen whose use in medicine has rapidly grown in recent years. Ozonated blood allows for the use of ozone in a safe modality, as plasma and blood cells are endowed with an antioxidant system able to quench ozone’s ...
Salvatore Chirumbolo   +12 more
doaj   +1 more source

A case report of heat stroke with early severe brain edema

open access: yes环境与职业医学, 2023
Heat stroke can be divided into two types: exertional and classic, mainly manifested as a clear history of exposure to hot temperature/high heat environment or intense physical activity in hot environment, core temperature exceeding 40 ℃, accompanied by ...
Tuoying WEN, Shisheng LUO, Liya PAN
doaj   +1 more source

Muscle Derived Mesenchymal Stem Cells Inhibit the Activity of the Free and the Neutrophil Extracellular Trap (NET)-Bond Myeloperoxidase

open access: yesCells, 2021
Mesenchymal stem cells (MSCs) are known to migrate to tissue injury sites to participate in immune modulation, tissue remodelling and wound healing, reducing tissue damage.
Thierry Franck   +4 more
doaj   +1 more source

Oxygen metabolism and oxygenation of the newborn [PDF]

open access: yesSeminars in Fetal and Neonatal Medicine, 2020
The premature infant is to some extent protected from hypoxia, however defense against hyperoxia is poorly developed. The optimal assessment of oxygenation is to measure oxygen delivery and extraction.
Andresen, Jannicke Hanne   +1 more
openaire   +4 more sources

The ‘oxygen’ in oxygen minimum zones

open access: yesEnvironmental Microbiology, 2022
AbstractAerobic processes require oxygen, and anaerobic processes are typically hindered by it. In many places in the global ocean, oxygen is completely removed at mid‐water depths forming anoxic oxygen minimum zones (A‐OMZs). Within the oxygen gradients linking oxygenated waters with A‐OMZs, there is a transition from aerobic to anaerobic microbial ...
Canfield, Donald E., Kraft, Beate
openaire   +3 more sources

Photochemical and Photophysical Properties of Carotenoids and Reactive Oxygen Species: Contradictions Relating to Skin and Vision

open access: yesOxygen, 2023
Molecular mechanisms based on photo-physical processes involving dietary carotenoids, their radicals, and the role of oxygen are discussed and used to suggest explanations of the poorly understood and often contradictory results related to mainly skin ...
Fritz Boehm   +2 more
doaj   +1 more source

Comparison of Oxygen Electrode Chronoamperometry and Spectrophotometry for Determination of Catalase Activity

open access: yesOxygen, 2023
Catalase is a key antioxidative enzyme, and a deficiency or malfunction of catalase is hypothesized to be related to various diseases. To investigate catalase activity, it is important to use reliable methods and experimental protocols enabling ...
Michal Szczepanczyk   +3 more
doaj   +1 more source

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