hydrogen cycle
51sulfur cycle — ▪ ecology circulation of sulfur in various forms through nature. Sulfur occurs in all living matter as a component of certain amino acids (amino acid). It is abundant in the soil in proteins (protein) and, through a series of microbial… …
52biogeochemical cycle — /baɪoʊdʒioʊˈkɛmɪkəl saɪkəl/ (say buyohjeeoh kemikuhl suykuhl) noun any of the global environmental cycles involving the movement of elements such as carbon, nitrogen, hydrogen, calcium and sulphur between biotic and abiotic environments, whether… …
53Carbon-Nitrogen-Oxygen Cycle — This is when the nuclear reactions in a star s core, using carbon as a catalyst, transform hydrogen into helium. Also called CNO Cycle …
The writer's dictionary of science fiction, fantasy, horror and mythology
54CNO Cycle — Carbon Nitrogen Oxygen Cycle. This is when the nuclear reactions in a star s core, using carbon as a catalyst, transform hydrogen into helium …
The writer's dictionary of science fiction, fantasy, horror and mythology
55isohydric cycle — the series of chemical reactions in the erythrocyte, in which the uptake of CO2 and the release of O2 are accomplished without the production of an excess of hydrogen ions (H+). See also buffer …
56the carbon cycle — UK / US noun 1) biology the movement of carbon between living things and their environment. carbon dioxide is taken from the atmosphere and used by plants. It then moves from plants eaten as food to animals, and is returned to the atmosphere by… …
57Methanogenesis — or biomethanation is the formation of methane by microbes known as methanogens. Organisms capable of producing methane have been identified only from the domain Archaea, a group phylogenetically distinct from both eukaryotes and bacteria,… …
58Photohydrogen — is hydrogen produced with the help of artificial or natural light This is how the leaf of a tree splits water molecules into protons (hydrogen ions), electrons (to make carbohydrates) and oxygen (released into the air for us to breathe) [… …
59List of environmental topics (H) — This is a list of environmental topics. They relate to the effect of human activity on the environment.*habitat conservation (habitat protection) *habitat destruction (habitat loss) *habitat fragmentation *Habitat II (UN conference) (in 1996)… …
60Dealkalization of water — The dealkalization of water refers to the removal of alkalinity ions from water. Chloride cycle anion ion exchange dealkalizers remove alkalinity from water. Chloride cycle dealkalizers operate similar to sodium cycle cation water softeners. Like …
