| D008027 |
Light |
That portion of the electromagnetic spectrum in the visible, ultraviolet, and infrared range. |
Light, Visible,Photoradiation,Radiation, Visible,Visible Radiation,Photoradiations,Radiations, Visible,Visible Light,Visible Radiations |
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| D010084 |
Oxidation-Reduction |
A chemical reaction in which an electron is transferred from one molecule to another. The electron-donating molecule is the reducing agent or reductant; the electron-accepting molecule is the oxidizing agent or oxidant. Reducing and oxidizing agents function as conjugate reductant-oxidant pairs or redox pairs (Lehninger, Principles of Biochemistry, 1982, p471). |
Redox,Oxidation Reduction |
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| D010100 |
Oxygen |
An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration. |
Dioxygen,Oxygen-16,Oxygen 16 |
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| D004578 |
Electron Spin Resonance Spectroscopy |
A technique applicable to the wide variety of substances which exhibit paramagnetism because of the magnetic moments of unpaired electrons. The spectra are useful for detection and identification, for determination of electron structure, for study of interactions between molecules, and for measurement of nuclear spins and moments. (From McGraw-Hill Encyclopedia of Science and Technology, 7th edition) Electron nuclear double resonance (ENDOR) spectroscopy is a variant of the technique which can give enhanced resolution. Electron spin resonance analysis can now be used in vivo, including imaging applications such as MAGNETIC RESONANCE IMAGING. |
ENDOR,Electron Nuclear Double Resonance,Electron Paramagnetic Resonance,Paramagnetic Resonance,Electron Spin Resonance,Paramagnetic Resonance, Electron,Resonance, Electron Paramagnetic,Resonance, Electron Spin,Resonance, Paramagnetic |
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| D005609 |
Free Radicals |
Highly reactive molecules with an unsatisfied electron valence pair. Free radicals are produced in both normal and pathological processes. Free radicals include reactive oxygen and nitrogen species (RONS). They are proven or suspected agents of tissue damage in a wide variety of circumstances including radiation, damage from environment chemicals, and aging. Natural and pharmacological prevention of free radical damage is being actively investigated. |
Free Radical |
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| D013481 |
Superoxides |
Highly reactive compounds produced when oxygen is reduced by a single electron. In biological systems, they may be generated during the normal catalytic function of a number of enzymes and during the oxidation of hemoglobin to METHEMOGLOBIN. In living organisms, SUPEROXIDE DISMUTASE protects the cell from the deleterious effects of superoxides. |
Superoxide Radical,Superoxide,Superoxide Anion |
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| D045332 |
Photosystem II Protein Complex |
A large multisubunit protein complex found in the THYLAKOID MEMBRANE. It uses light energy derived from LIGHT-HARVESTING PROTEIN COMPLEXES to catalyze the splitting of WATER into DIOXYGEN and of reducing equivalents of HYDROGEN. |
Chloroplast Reaction Center Protein D1,D1 Photosystem II Protein, Plant,Light-Induced D1 Protein, Photosystem II,Oxygen Evolving Enzyme,PRCP II D2 Protein,Photosystem II,Photosystem II Reaction Center,Photosystem II Reaction Center Complex D1 Protein,Photosystem II Reaction Center Complex D2 Protein,RCII-D1 Protein,Water Oxidase,Water-Splitting Enzyme of Photosynthesis,Enzyme, Oxygen Evolving,Evolving Enzyme, Oxygen,Light Induced D1 Protein, Photosystem II,Oxidase, Water,Photosynthesis Water-Splitting Enzyme,Water Splitting Enzyme of Photosynthesis |
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| D055668 |
Photochemical Processes |
Chemical reactions effected by light. |
Processes, Photochemical |
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| D018724 |
Spinacia oleracea |
A widely cultivated plant, native to Asia, having succulent, edible leaves eaten as a vegetable. (From American Heritage Dictionary, 1982) |
Spinach |
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| D019097 |
Spin Trapping |
A technique for detecting short-lived reactive FREE RADICALS in biological systems by providing a nitrone or nitrose compound for an addition reaction to occur which produces an ELECTRON SPIN RESONANCE SPECTROSCOPY-detectable aminoxyl radical. In spin trapping, the compound trapping the radical is called the spin trap and the addition product of the radical is identified as the spin adduct. (Free Rad Res Comm 1990;9(3-6):163) |
Spin Trappings,Trapping, Spin,Trappings, Spin |
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