| 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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| D009586 |
Nitrogen Fixation |
The process in certain BACTERIA; FUNGI; and CYANOBACTERIA converting free atmospheric NITROGEN to biologically usable forms of nitrogen, such as AMMONIA; NITRATES; and amino compounds. |
Diazotrophy,Diazotrophic Activity,Dinitrogen Fixation,N2 Fixation,Activities, Diazotrophic,Activity, Diazotrophic,Diazotrophic Activities,Fixation, Dinitrogen,Fixation, N2,Fixation, Nitrogen |
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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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| D010101 |
Oxygen Consumption |
The rate at which oxygen is used by a tissue; microliters of oxygen STPD used per milligram of tissue per hour; the rate at which oxygen enters the blood from alveolar gas, equal in the steady state to the consumption of oxygen by tissue metabolism throughout the body. (Stedman, 25th ed, p346) |
Consumption, Oxygen,Consumptions, Oxygen,Oxygen Consumptions |
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| D003486 |
Cyanides |
Inorganic salts of HYDROGEN CYANIDE containing the -CN radical. The concept also includes isocyanides. It is distinguished from NITRILES, which denotes organic compounds containing the -CN radical. |
Cyanide,Isocyanide,Isocyanides |
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| D003624 |
Darkness |
The absence of light. |
Darknesses |
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| D004140 |
Dinitrophenols |
Organic compounds that contain two nitro groups attached to a phenol. |
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| D004237 |
Diuron |
A pre-emergent herbicide. |
DCMU,3-(3,4-Dichlorophenyl)-1,1-dimethylurea |
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| D006859 |
Hydrogen |
The first chemical element in the periodic table with atomic symbol H, and atomic number 1. Protium (atomic weight 1) is by far the most common hydrogen isotope. Hydrogen also exists as the stable isotope DEUTERIUM (atomic weight 2) and the radioactive isotope TRITIUM (atomic weight 3). Hydrogen forms into a diatomic molecule at room temperature and appears as a highly flammable colorless and odorless gas. |
Protium,Hydrogen-1 |
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| D000114 |
Acetylene |
The simplest two carbon alkyne with the formula HCCH. |
Ethyne |
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