 |
A B C D E F G H I J K L M N O P R S T U V X Y Z << >>
| Terms for subject Environment (5171 entries) |
| akvifer | aquifer (Layers of rock, sand or gravel that can absorb water and allow it to flow. An aquifer acts as a groundwater reservoir when the underlying rock is impermeable. This may be tapped by wells for domestic, agricultural or industrial use. A serious environmental problem arises when the aquifer is contaminated by the seepage of sewage or toxins from waste dumps. If the groundwater in coastal areas is over-used salt water can seep into the aquifer) | |
| alarm | alarm (Signalling an impending danger in order to call attention to some event or condition) | |
| alder | age (The period of time that a person, animal or plant has lived or is expected to live) | |
| alfastråling | alpha radiation (A stream of alpha particles which are ejected from many radioactive substances having a penetrating power of a few cm in air but can be stopped by a thin piece of paper) | |
| alge | alga (Simple, green, aquatic plants without stems, roots or leaves. They are among the microscopic organisms that form the start of the food chain. Algae are found floating in the sea and fresh water, but they also grow on the surface of damp walls, rocks, the bark of trees and on soil. They contain chlorophyll and other pigments that let them grow by photosynthesis. On land, algae can be useful in improving the fertility of soil by nitrogen fixation) | |
| algemiddel | algicide (Any substance or chemical applied to kill or control algal growth) | |
| algeoppblomstring | algal bloom (Excessive and rapid growth of algae and other aquatic plants when they are stimulated to grow too quickly by pollution. It takes place when there are too many nutrients in the water and is aggravated when accompanied by a rise in temperature. Although the algae grow quickly they soon die because they have swallowed up all the water's nutrients. As they decompose they tend to rise to the surface and form a green slime. Algal bloom have increased because higher levels of nitrogen and phosphates from agricultural areas have leached from the fields into water courses) | |
| alifatisk forbindelse | aliphatic compound (Any organic compound of hydrogen and carbon characterized by a straight chain of the carbon atoms) | |
| alifatisk hydrokarbon | aliphatic hydrocarbon (Hydrocarbons having an open chain of carbon atoms, whether normal or forked, saturated or unsaturated) | |
| alisyklisk forbindelse | alicyclic compound (Any substance composed of two or more unlike atoms held together by chemical bonds characterized by straight-chained, branched or cyclic properties) | |
| alisyklisk hydrokarbon | alicyclic hydrocarbon (A class of organic compounds containing only carbon and hydrogen atoms joined to form one or more rings and having the properties of both aliphatic and cyclic substances) | |
| alkalijord | alkali soil (Soil that contains sufficient exchangeable sodium to interfere with water penetration and crop growth, either with or without appreciable quantities of soluble salts) | |
| alkalimetall | element of group (Any of the monovalent metals lithium, sodium, potassium, rubidium, caesium, and francium, belonging to group 1A of the periodic table. They are all very reactive and electropositive; alkaline) | |
| alkalisk batteri | alkaline battery (A primary cell that uses an alkaline electrolyte, usually potassium hydroxide, and delivers about 1.5 volts at much higher current rates than the common carbon-zinc cell. Also known as alkaline-manganese cell) | |
| alkalisk jord | alkali land (Any geomorphic area, often a level lake-like plain, with soil containing a high percentage of mineral salts, located especially in arid regions) | |
| alkan | alkane (Paraffins. A homologous series of saturated hydrocarbons having the general formula CnH2n+2. Their systematic names end in -ane. They are chemically inert, stable, and flammable. The first four members of the series (methane, ethane, propane, butane) are gases at ordinary temperatures; the next eleven are liquids, and form the main constituents of paraffin oil; the higher members are solids. Paraffin waxs consists mainly of higher alkanes) | |
| alkoholer | alcohol (A group of organic chemical compounds composed of carbon, hydrogen, and oxygen. The molecules in the series vary in chain length and are composed of a hydrocarbon plus a hydroxyl group. Alcohol includes methanol and ethanol) | |
| alkylforbindelse | alkyl compound (Compound containing one or more alkyl radicals) | |
| allemannsretten | public access to land (The right or permission for all persons of a community to use government owned geographic areas such as parks, campgrounds and historical sites) | |
| allergi | allergy (A condition of abnormal sensitivity in certain individuals to contact with substances such as proteins, pollens, bacteria, and certain foods. This contact may result in exaggerated physiologic responses such as hay fever, asthma, and in severe enough situations, anaphylactic shock) |