| 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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| nivel de fond |
background level (Term used in a variety of situations, always as the constant or natural amount of a given substance, radiation, noise, etc.) |
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| nivel de trai |
living standard (A measurement of the development level in a country or community, gauged by factors such as personal income, education, life expectancy, food consumption, health care, technology and the use of natural resources) |
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| nivel de vegetaţie |
vegetation level (A subdivision of vegetation characteristic of a certain altitude above sea level at a given latitude) |
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| nivel de zgomot |
noise level (Physical quantity of unwanted sound measured, usually expressed in decibels) |
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| nivel municipal |
municipal level (The jurisdiction, position or status of city, town or local government) |
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| nivel trofic |
trophic level (Any of the feeding levels through which the passage of energy through an ecosystem proceeds; examples are photosynthetic plants, herbivorous animals, and microorganisms of decay) |
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| nivelul de plumb din sânge |
lead level in blood (A measure of the amount of lead or lead salts absorbed by the body as a possible sign of acute or chronic lead poisoning, which can affect the nervous, digestive or muscular systems) |
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| nivelul mării |
sea level (The level of the surface of the ocean; especially, the mean level halfway between high and low tide, used as a standard in reckoning land elevation or sea depths) |
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