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| Terms for subject Environment (5179 entries) |
| neteja de terres | land clearing (Removal of trees, undergrowth, etc. in preparation for ploughing, building, etc.) | |
| neteja en sec | dry cleaning (To clean fabrics etc. with a solvent other than water) | |
| neteja en sec | laundering (The act of washing and ironing clothes, linen, etc.) | |
| neteja municipal | municipal cleansing (The aggregation of services offered by a town or city in which streets and other public areas are kept clean, such as through trash pick-ups, street sweeping and decontamination of water, soil and other natural resources) | |
| netejar amb un raig d'aigua | flushing (Removing lodged deposits of rock fragments and other debris by water flow at high velocity; used to clean water conduits and drilled boreholes) | |
| neu | snow (The most common form of frozen precipitation, usually flakes or starlike crystals, matted ice needles, or combinations, and often rime-coated) | |
| neurotoxicitat | neurotoxicity (The occurrence of adverse effects on a nervous system following exposure to a chemical) | |
| neutralització | neutralisation (To make a solution neutral by adding a base to an acidic solution, or an acid to a basic solution) | |
| níquel | 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) | |
| nitrato de peroxiacetil | peroxyacetylnitrate (A pollutant created by the action of sunlight on hydrocarbons and nitrogen oxides in the air. An ingredient of smog) | |
| nitrats | nitrate (Any salt or ester of nitric acid, such as sodium nitrate) | |
| nitrificació | 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) | |
| nitrit | nitrite (A salt or ester of nitric acid, included in compounds such as potassium nitrite, sodium nitrite and butyl nitrite) | |
| nitrocompost | nitro compound (Any one of a class of usually organic compounds that contain the monovalent group, -NO2 (nitro group or radical) linked to a carbon atom) | |
| nitrogen | nitrogen (An essential nutrient in the food supply of plants and the diets of animals. Animals obtain it in nitrogen-containing compounds, particularly amino acids. Although the atmosphere is nearly 80% gaseous nitrogen, very few organisms have the ability to use it in this form. The higher plants normally obtain it from the soil after micro-organisms have converted the nitrogen into ammonia or nitrates, which they can then absorb) | |
| nitrogen orgànic | organic nitrogen (Essential nutrient of the food supply of plants and the diets of animals. Animals obtain it in nitrogen-containing compounds, particularly aminoacids. Although the atmosphere is nearly 80% gaseous nitrogen, very few organisms have the ability to use it in this form. The higher plants normally obtain it from the soil after microorganisms have converted the nitrogen into ammonia or nitrates, which they can then absorb. This conversion of nitrogen, known as nitrogen fixation, is essential for the formation of amino acids which, in turn, are the building blocks of proteins) | |
| nitrosamina | nitrosamine (Any one of a class of neutral, usually yellow oily compounds containing the divalent group = NNO) | |
| nivel tròfic | 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) | |
| nivell acústic | acoustic level (Physical quantity of sound measured, usually expressed in decibels) | |
| nivell crític | critical level (General term referring to the concentration limit beyond which a substance can cause dangerous effects to living organisms) |