Oxygen

Reactive oxygen species are formed by several different mechanisms:
the interaction of ionizing radiation with biological molecules
as an unavoidable byproduct of cellular respiration.
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The family of haem oxygenase enzymes is unique in nature for its role in haem degradation.
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Oxygen-depleted or deoxygenated blood from the body enters the right atrium through two great veins, the superior vena cava which drains the upper part of the body and the inferior vena cava that drains the lower part.
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Oxygen technique (primary productivity). The estimation of primary productivity by the measurement of the rate of oxygen increase
Parapatric speciation. The differentiation into distinct species of populations experiencing some gene flow ...
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Oxygen depletion
This is a disambiguation page: a list of articles associated with the same title. If an internal link referred you to this page, you may wish to change the link to point directly to the intended article.
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oxygen debt
In muscle, the cumulative deficit of oxygen that develops during strenuous exercise when the supply of oxygen is inadequate for the demand; ATP is produced anaerobically by glycolysis, ...
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Oxygen is the final electron acceptor. The low-energy electrons that emerge from the electron transport system are taken up by O2. The negatively charged oxygen molecules take up protons from the medium and form water (2H+ + 2e- + 1/2 O2 H2O).
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Oxygen Balance (OB%)
Oxygen balance is an expression that is used to indicate the degree to which an explosive can be oxidized.
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oxygen An element that is one of the constituents of water, organic matter, and many other chemicals. Oxygen gas (O2), composed of two oxygen atoms, is needed for respiration and is produced by photosynthesis.
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Oxygen to breathe (for use in aerobic respiration.
Medicines (to augment the body's own immune defenses)
Food (which we as heterotrophic consumers in the food pyramid need).
Drinkable water (purified by microbial activity) ...
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Oxygen element with eight protons
(oxy = sharp acid; gen = bear produce)
P
PalearcticRealm the biogeographical realm including Europe and northern Asia
(paleo = ancient; arctic = northern) ...
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oxygenated blood
blood that has become enriched with oxygen as it exchanges with the lungs.
P ...
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the oxygen carrying molecule of red blood cells; it is made up of four polypeptide chains (2 alpha type and 2 beta type) and non-protein molecules called porphyrins
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition.
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A microorganism that grows in the presence of oxygen. See Anaerobe. Agarose gel electrophoresis. A matrix composed of a highly purified form of agar that is used to separate larger DNA and RNA molecules ranging 20,000 nucleotides.
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aerobe An organism that uses oxygen as the terminal electron acceptor in respiration. aerobic Requiring or occurring in the presence of oxygen. albumin 66.
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This insight includes, among others: (1) Cells can be grown in the absence of either oxygen evolution (by photosynthesis) or oxygen uptake (by respiration) when a fixed-carbon source is available; ...
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5 billion years ago, gaseous oxygen began to appear. Unlike the carbon dioxide, oxygen almost certainly came about because of microbes. Microbes similar to today's cyanobacteria were present at this time.
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This process releases oxygen as a waste product. Anoxygenic (or H2S) photosynthesis, using PSI, is seen in living purple and green bacteria. Oxygenic (or H2O) photosynthesis, using PSI and PSII, takes place in cyanobacteria.
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The water is also clearer, has higher oxygen levels, and freshwater fish such as trout and heterotrophs can be found there.
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An essential element enabling the oxygen-carrying capacity of hemoglobin in red blood cells.
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The anaerobic breakdown (that is, in the absence of oxygen) of carbohydrates, in which a molecule of glucose is converted by a series of steps to two molecules of lactic acid, yielding energy in the form of ATP.
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Addition of methyl groups to selected ribose oxygens (65 in 28S and 40 in 18S segments) and methylation of 5 bases in the 28S segment.
Cleavage of the ETS-18S boundary.
Cleavage of the 18S-ITS and ITS-5.8S boundaries.
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Aerobic
The presence of oxygen. Often used to describe an organism that requires oxygen for growth or growth conditions with oxygen.
Affinity
The strength of an interaction between two molecules, such as the binding of an antigen to an antibody.
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left atrium: the chamber of the human heart that receives oxygen-rich blood via the pulmonary vein.
left ventricle: the chamber of the human heart in which oxygen-rich blood enters through the bicuspid valve that leads into the aorta.
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An organism that grows in the absence of oxygen. See Aerobe.
Anneal. The pairing of complementary DNA or RNA sequences, via hydrogen bonding, to form a double-stranded polynucleotide.
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A weak electrostatic link between an electronegative atom (such as oxygen) and a hydrogen atom which is linked covalently to another electronegative atom; hydrogen bonding is what makes water stick to itself.
Deoxyribonucleic acid (DNA) ...
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The disorder is caused by a single base pair change in one of the genes that codes for hemoglobin, the blood protein that carries oxygen.
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2713. Fructosyl aminocaproate-oxygen oxidoreductase
Number of views: 35
2714. Fructosyl lysine oxidase ...
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peroxisomes - small membrane -bounded organelle that uses molecular oxygen to oxidize organic molecules.
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Common secondary 3-dimensional structure of proteins in which the linear sequence of amino acids is folded into a spiral that is stabilized by hydrogen bonds between the carboxyl oxygen of each peptide bond.
Ab
initio
gene prediction ...
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placenta - embryonic/maternal organ that serves nutritional and respiratory functions of the mammalian fetus. It is composed of the embryonic chorion and maternal uterine endometrium, allowing provision of oxygen and nutrients to the fetus and ...
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resemble Archeons in their general sizes and shapes, but are distinguished from them by different membrane structures, gene sequences, and metabolisms. One important type of bacteria is the cyanobacteria, which use chlorophyll for oxygenic ...
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Readily formed between -OH (hydroxyl) and NH2 (amino) groups and oxygen or nitrogen atoms. They are important in proteins and are the mechanism for base-pairing in nucleic acids. They are easily disrupted by heat.
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Sickle cell anemia -- an hereditary, chronic form of hemolytic anemia characterized by breakdown of the red blood cells; red blood cells undergo a reversible alteration in shape when the oxygen tension of the plasma falls slightly and a sickle-like ...
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