Thursday, May 24, 2007

  • GIDROIDNYE, a class of water Invertebrata of type knidary. 5-6 orders, including hydras; ok. 4000 kinds. The majority - colonial marine animal of which alternation sexual (medusas) and asexual (polyps) of generations is typical.
  • HYDROISOBATHS, isolines of depths of a mirror of underground waters from a surface.
  • HYDROISOHYPSES, isolines of marks of a mirror of underground waters concerning a conditional null surface.
  • WATERPROOFER, protection of designs, buildings and structures from influence on them waters and other liquids, the warning of escape of process iquids, and also a means used for these purposes.
  • HYDROISOPLETHS, isolines of a soil moisture on different depths in miscellaneous time; points of equal water levels in miscellaneous wells in miscellaneous time (see. Isopleths).
  • HYDROISOTHERMS, isolines of temperature of water in the given strata of rocks.
  • HYDROCARBONATES (bicarbonates), acid salts of metacarbonic acid Í2ÑÎ3, napr., baking soda NàÍÑÎ3.
  • HIDROCORTIZONUM (hydrocortisone), hormone animal and the person, produced by a bark of suprarenal glands (corticosteroid). Participates in a regulation carbohydrate, proteinaceous and an adipose metabolism in an organism; boosts disintegration of proteins and synthesis of carbohydrates. Apply in medicine, primarily as an anti-inflammatory and antiallergic means, and also at his failure in an organism.
  • RECOVERY SUIT (immersion suit), part of diving equipment; protects the diver from overcooling and traumas. Distinguish recovery suits water-proof (from rubber cloth) and water-permeable (from foam rubber).
  • HYDROCRACKING, thorough revision of higher-boiling oil fractions, fuel oil or tar for obtaining petrol, diesel and reactive combustibles, greasing oils, etc. Carry out action of hydrogen at 330-450 °S and pressure 5-30 MPa at the presence of catalysts.
  • The HYDROX, way of a non-flame blasting, is based on instantaneous reaction inside the cartridge (also called by a hydrox) the mix of chemicals attending with a calorification and education of a plenty of water steams in a mix with carbon dioxide and nitrogen.
  • OXYHYDROXIDES, chemical combinations of oxides with water. Oxyhydroxides of many metals - the groundings, and metalloids - acids. The oxyhydroxides showing as main, and acid properties, call amphoteric. Routinely the term "oxyhydroxide" concerns only to the groundings. See also Alkalis.
  • OXYHYDROXIDES NATURAL, subclass (or a class) minerals, natural water oxides of metals. On crystalline structure distinguish layered, chain, less often framed oxyhydroxides natural. Will derivate large deposits (napr., bauxites, iron, manganous, uranic, vanadic ores).
  • HYDROXYLAMINE, NH2OH, colourless crystals; tïë 32 °S. Beyond all bounds we shall dissolve in water. It is toxicant. Interacting with acids, will derivate salt, napr. (NH3OH) 2SO4. Apply in manufacture of caprolactam, in an analytical chemistry.
  • HYDROXONIUM, Í3Î +, a hydrated ion of hydrogen; exists in water solutions of acids.
  • HYDROLASE, a class of the ferments catalyzing reactions of a hydrolysis, i.e. scission of organic compounds including waters. Many digestive enzymes concern to hydrolases; a number of hydromanholes use in a food-processing industry.
  • HYDROLYSIS (from gidro... And... liz), an exchange reaction (double replacement) between substance and water, napr., AlCl3 + 3H2O? Al (OH) 3 + 3HCl. The basis of many technological and natural processes.
  • The HYDROLOGICAL STATION, 1) executes study of a hydrological regime of the rivers, lakes, seas, water reservoirs, bogs, icehouses. 2) Point with fixed coordinates on the pest (lake) where a series of hydrological observations is carried out.
  • HYDROLOGICAL MAPS, map distribution of waters above ground, define a mode of water objects and allow to estimate water resources.
  • HYDROLOGICAL PROGNOSES, the section of land hydrology including a scientific forecast of development of those or other processes, descending on the rivers, lakes or water reservoirs, definition of their times and parameters. Distinguish hydrological prognoses: on kinds - water (volume seasonal and pavodochnogo a drainage, maximum and minimum discharges of water and levels) and ice (times of dissection and freezing of the rivers, lakes, water reservoirs, an ice depth, etc.); on a forecast-time interval - near-term (up to 15 sut), long-term (about several months) and superlong-term.
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