| neurotoxicitate |
neurotoxicity (The occurrence of adverse effects on a nervous system following exposure to a chemical) |
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| neutralizare |
neutralisation (To make a solution neutral by adding a base to an acidic solution, or an acid to a basic solution) |
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| nevertebrat |
invertebrate (Any animal lacking a backbone, including all species not classified as vertebrates) |
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| nişă ecologică |
ecological niche (1. The space occupied by a species, which includes both the physical space as well as the functional role of the species. 2. Ecological niche refers to the characteristics of an environment that provides all the essential food and protection for the continued survival of a particular species of flora or fauna. In addition to food and shelter, there is no long-term threat to existence in that place from potential predators, parasites and competitors. The concept of the ecological niche goes a long way beyond the idea of the species habitat) |
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| nichel |
nickel (A malleable ductile silvery-white metallic element that is strong and corrosion-resistant, occurring principally in pentlandite and niccolite: used in alloys, especially in toughening steel, in electroplating, and as a catalyst in organic synthesis) |
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| nisip |
sand (A loose material consisting of small mineral particles, or rock and mineral particles, distinguishable by the naked eye; grains vary from almost spherical to angular, with a diameter range from 1/16 to 2 millimeters) |
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| nisip de asfalt |
tar sand (A sandstone in which hydrocarbons have been trapped; the lighter compounds evaporate, leaving a residue of asphalt in the rock pores) |
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| nitrat |
nitrate (Any salt or ester of nitric acid, such as sodium nitrate) |
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| nitrificare |
nitrification (The process by which ammonia compounds, including man-made fertilizer and the humus provided by organic matter or plant and animal origin, are converted into nitrites and then nitrates, which are then absorbed as a nutrient by crops. Excess nitrate can be leached into surface waters and groundwaters, causing pollution. Excess nitrate may also be converted by microbes back into gaseous nitrogen, which is an important greenhouse gas, and released back into the atmosphere. The ultimate source of nitrogen in the ecosystem is the molecular nitrogen in the atmosphere. To a very limited extent, some dissolves in water. However, none is found in rock) |
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| nitrit |
nitrite (A salt or ester of nitric acid, included in compounds such as potassium nitrite, sodium nitrite and butyl nitrite) |
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| nitrozamină |
nitrosamine (Any one of a class of neutral, usually yellow oily compounds containing the divalent group = NNO) |
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| nivel acceptabil de expunere a operatorului |
acceptable operator exposure level |
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| nivel acceptabil de risc |
acceptable risk level (Level of risk judged to be outweighed by corresponding benefits or one that is of such a degree that it is considered to pose minimal potential for adverse effects) |
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| nivel acustic |
acoustic level (Physical quantity of sound measured, usually expressed in decibels) |
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| nivel acustic |
sound level (The sound pressure level (in decibels) at a point in a sound field, averaged over the audible frequency range and over a time interval) |
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| nivel al apei |
water level (The level reached by the surface of a body of water) |
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| nivel al poluantului |
pollutant level (A value representing the concentration of a polluting agent in a specified area, often determined by a measuring and recording device) |
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| nivel critic |
critical level (General term referring to the concentration limit beyond which a substance can cause dangerous effects to living organisms) |
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| nivel de educaţie |
level of education (A position along a scale of increasingly advanced training marking the degree or grade of instruction either obtained by an individual, offered by a some entity or necessary for a particular job or task) |
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| nivel de eficienţă |
efficiency level (The ratio of output to input, usually given as a percentage) |
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