| osmosis (The passage of a solvent through a semipermeable membrane separating two solutions of different concentrations. A semipermeable membrane is one through which the molecules of a solvent can pass but the molecules of most solutes cannot. There is a thermodynamic tendency for solutions separated by such a membrane to become equal in concentration, the water (or other solvent) flowing from the weaker to the stronger solution. Osmosis will stop when the two solutions reach equal concentration, and can also be stopped by applying a pressure to the liquid on the stronger-solution side of the membrane. The pressure required to stop the flow from a pure solvent into a solution is a characteristic of the solution, and is called the osmotic pressure. Osmotic pressure depends only on the concentration of particles in the solution, not on their nature) |
ozmózis |
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| OSPAR Commission |
OSPAR-bizottság |
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| OSPAR Convention |
az Atlanti-óceán észak-keleti körzete tengeri környezetének védelméről szóló egyezmény |
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| outer space (allocation plan, Area out of closed settlements or building, area out of closed settlements or building) |
külső tér |
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| oven (An enclosed heated compartment usually lined with a refractory material used for drying substances, firing ceramics, heat-treating, etc.) |
sütő |
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| oven drying |
kemencében történő szárítás |
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| overburden (The material such as soil and rock lying above a mineral deposit that must be removed in order to work the deposit) |
fedőréteg |
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| overcrowding (An excess of people gathered together in a confined space) |
túlzsúfoltság |
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| overexploitation (The use of raw materials excessively without considering the long-term ecological impacts of such use) |
túlzott kitermelés |
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| overfertilisation (Putting too much fertilizer on land; the runoff from overfertilisation can cause water pollution) |
túlzott műtrágyázás |
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| overfishing |
túlhalászás |
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| overfishing (Taking out of the sea more than natural population growth can sustain. Overfishing has a number of causes, the most ruthless being "chronic over capacity" of modern fishing fleets to effectively take far more fish than can be replaced) |
túlzott halászat |
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| overflow (outlet, Any device or structure that conducts excess water or sewage from a conduit or container) |
túlfolyó |
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| overgrazing (Intensive grazing by animals, for example cattle, sheep or goats, on an area of pasture. It has become a serious threat to the world's rangelands and grasslands. Several factors have led to overgrazing, which leads to the soil being degraded and becoming liable to erosion by wind and rain, and even to desertification. The main pressures leading to widespread overgrazing have been the need to increase the size and numbers of herds to produce more food for an increasing human population, and the transformation of traditional pasture land into plantations to grow cash crops. Throughout the dry tropics, where traditionally herds ranged over vast areas, intensive livestock-rearing schemes have taken over, mostly to provide meat for the export market. Well-digging operations have also led to heavy concentrations of animals in small areas) |
túlzott legeltetés |
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| overhead power line (Suspended cables by which electrical power is distributed throughout a country) |
felső erősáramú vezeték |
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| overpopulation (A population density that exceeds the capacity of the environment to supply the health requirements of the individual organism) |
túlnépesedés |
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| overturn (The circulation, especially in the fall and spring, of the layers of water in a lake or sea, whereby surface water sinks and mixes with bottom water; it is caused by changes in density differences due to changes in temperature, and is especially common wherever lakes are icebound in winter; limnology) |
felbomlás |
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| overwintering (To spend winter in a particular place) |
áttelelés |
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| ovine (Horned ruminant mammals raised in many breeds for wool, edible flesh, or skin) |
birka- |
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| ownership (Collection of rights to use and enjoy property, including right to transmit it to others. The complete dominion, title, or proprietary right in a thing or claim) |
tulajdon |
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