Thursday, May 17, 2007

  • FROND (from grech. baion - a palm branch), leaves of ferns.
  • VAJJAN-KUTJURE Pol (1892-1937), the French writer. The collection of stories " the Dancing party blind " (1927), the autobiographical book "Childhood" (it is published 1938). The book " On a service of reason " (1937).
  • VAK, see. The maximum attestative committee.
  • VACANCY, one of kinds of structural defects of a crystal lattice - point of the lattice in which there is an atom or an ion (vakansionnyj a unit).
  • VACANCY (from an armour. vacans - empty, loose), the unreplaced position in establishment, an educational institution.
  • VAKASHSKIE TONGUES, group of affine tongues of American Indian peoples vakashi. Actuates tongues nutka and kvakiutl, etc. Enters in mosanskuju the group of tongues representing possible branch algonkino-vakashskoj of macrofamily.
  • WAKAYAMA, city and port in Japan (about. Honshu), an administrative centre of prefecture Wakayama. 396 thousand inhabitants (1992). A chemical, oil refining and textile industry. Iron and steel industry, a machine industry. A rayon industry, lacquered items. Center of area of a gardening.
  • VAKENBUH (from vakus and a nem. Buch - the book), a list of peasant farms and their feudal services in Estonia and Latvia 14-19 centuries.
  • VAKSMAN (Waksman) Zelman (1888-1973), the American microbiologist. For the first time has secured a number of antibiotics. In 1944 has discovered a streptomycine. The Nobel Prize (1952).
  • VACUOLES (frants. vacuole, from an armour. vacuus - empty), cavities in animal and plant cells or unicells. Distinguish alimentiry and sokratitelnye (pulsing) vacuoles regulating an osmotic pressure and employees for breeding from an organism of decomposition product.
  • VAKUS (est. vakus), 1) an administrative and territorial unit in Middle Ages for estov and livov (10-100 peasant farms). 2) Collection of peasants - dvorohozjaev in Baltic till 17 century (1-5 yearly) for payment of a tax, fulfilment of natural duties and court.
  • AIR VOID in a quantum theory of a field, the lowest energy state of a quantum field. The average of particles - field quantums - in vakkume is equal to zero, however in vacuo there can be a birth of virtual particles which influence physical processes (that is revealed experimentally).
  • AIR VOID (from an armour. vacuum - vacuum), a condition of gas at pressures p, lower, than atmospheric. Distinguish a rough vacuum (in vacuum devices and installations to him there corresponds range of pressures p above 100 Pa), mean (0,1 Pa

  • VACUUM OPERATION, removal (suction) of gas, fallow from apparatuses (vessels) with the purpose of obtaining in them subatmospheric pressures.
  • VACUUM OPERATION of CONCRETE, removal (suction) from a dense concrete mix in a casing exuberant (over necessary for a hydration of cement) waters, and also air. Allows to increase toughness, frost resistance of concrete, gear ups process of his concreting.
  • The VACUUM GAUGE (from air void and... Meter), a gauge meter of subatmospheric pressure. Are distributed liquid, ionization, thermal, etc. vacuum gauges.
  • The VACUUM FURNACE, ministers for heating and swim pants of metal in vacuo. Distinguish the arc, inductive, cathode-ray and plasma vacuum furnaces. Allows to clear efficiently metal of gases, impurity, nonmetallics. Apply to obtaining metal and special high-duty alloys.
  • The VACUUM PUMP, ministers for removal (roll-out) of gases or steams from selfcontained volume (system) with the purpose of obtaining in a nem of air void. The main phylums of vacuum pumps: mechanic, jet, sorption, cryogenic.
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