| ou |
egg (A large, female sex cell enclosed in a porous, calcareous or leathery shell, produced by birds and reptiles) |
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| ovină |
ovine (Horned ruminant mammals raised in many breeds for wool, edible flesh, or skin) |
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| oxadixil |
oxadixyl |
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| oxid |
oxide (Binary chemical compound in which oxygen is combined with a metal or nonmetal) |
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| oxid de azot |
nitrogen oxide (A colorless gas that, at room temperature, reacts with oxygen to form nitrogen dioxide; may be used to form other compounds, NOx) |
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| oxid de azot |
nitrogen oxide |
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| oxid de metal |
metal oxide (Any binary compound in which oxygen is combined with one or more metal atoms) |
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| oxid de sulf |
sulphur oxide (An oxide of sulphur, such as sulphur dioxide and sulphur trioxide; they are formed primarily from the combustion of fossil fuels; major air pollutants and cause of damage to the respiratory tract as well as vegetation, SOx) |
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| oxidant fotochimic |
photochemical oxidant (Any of the chemicals which enter into oxidation reactions in the presence of light or other radiant energy) |
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| oxidare |
oxidation (A chemical reaction that increases the oxygen content of a compound) |
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| oxido-reducere |
oxidation-reduction (An oxidizing chemical change, where an element's positive valence is increased (electron loss), accompanied by a simultaneous reduction of an associated element (electron gain)) |
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| oxigen |
oxygen (A gaseous chemical element; an essential element in cellular respiration and in combustion processes; the most abundant element in the earth's crust and about 20% of the air by volume) |
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| oxigen dizolvat |
dissolved oxygen (The amount of oxygen dissolved in a stream, river or lake is an indication of the degree of health of the stream and its ability to support a balanced aquatic ecosystem. The oxygen comes from the atmosphere by solution and from photosynthesis of water plants. The maximum amount of oxygen that can be held in solution in a stream is termed the saturation concentration and, as it is a function of temperature, the greater the temperature, the less the saturation amount. The discharge of an organic waste to a stream imposes an oxygen demand on the stream. If there is an excessive amount of organic matter, the oxidation of waste by microorganisms will consume oxygen more rapidly than it can be replenished. When this happens, the dissolved oxygen is depleted and results in the death of the higher forms of life) |
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| oxigenare |
oxygenation (Treating with oxygen) |
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| oxizi de azot |
nitrogen oxides (Oxides formed and released in all common types of combustion; they are formed by the oxidation of atmospheric nitrogen at high temperatures. Introduced into the atmosphere from car exhausts, furnace stacks, incinerators, power stations and similar sources, the oxides include nitrous oxide, nitric oxide, nitrogen dioxide, nitrogen pentoxide and nitric acid. The oxides of nitrogen undergo many reactions in the atmosphere to form photochemical smog) |
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| ozon |
ozone (An allotropic form of oxygen containing three atoms in the molecule. It is a bluish gas, very active chemically, and a powerful oxidizing agent. Ozone is formed when oxygen or air is subjected to a silent electric discharge. It occurs in ordinary air in very small amounts only) |
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| ozon atmosferic |
atmospheric ozone (A triatomic molecule of oxygen; a natural constituent of the atmosphere, with the highest concentrations in the ozone layer or stratosphere; it is found at a level between 15 and 30 km above the Earth, which prevents harmful ultraviolet B radiation, which causes skin cancer and threatens plant life, from reaching the ground. The fragile shield is being damaged by chemicals released on Earth. The main chemicals that are depleting stratospheric ozone are chlorofluorocarbons (CFCs), which are used in refrigerators, aerosols and as cleaners in many industries and halons, which are used in fire extinguishers. The damage is caused when these chemicals release highly reactive forms of chlorine and bromine) |
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| ozon fotochimic |
photochemical ozone |
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| ozon troposferic |
tropospheric ozone (Tropospheric ozone is a secondary pollutant formed from emissions of nitrogen oxides, non-methane volatile organic compounds and carbon monoxide. Ozone scars lung tissue, makes eyes sting and throats itch. It has been implicated as a contributor to forest dieback, damage to agricultural crops, etc.) |
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| ozonare |
ozonization (The process of treating, impregnating or combining with ozone) |
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