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| Terms for subject Environment (7489 entries) |
| fotokeemiline toime | photochemical effect (The result or consequence of a chemical reaction caused by light or ultraviolet radiation) | |
| fotolüüs | photodegradation (The capability of being decomposed by prolonged exposure to light) | |
| fotooksüdant | photochemical oxidant (Any of the chemicals which enter into oxidation reactions in the presence of light or other radiant energy) | |
| fotosüntees | photosynthesis (The process by which plants transform carbon dioxide and water into carbohydrates and other compounds, using energy from the sun captured by chlorophyll in the plant. Oxygen is a by-product of the process. Photosynthesis is the essence of all plant life (autotrophic production) and hence of all animal life (heterotrophic production) on the planet Earth. The rate of photosynthesis depends on climate, intensity and duration of sunlight, available leaf area, soil nutrient availability, temperature, carbon dioxide concentration, and soil moisture regimes) | |
| freoon | chlorofluorocarbon (Gases formed of chlorine, fluorine, and carbon whose molecules normally do not react with other substances; they are therefore used as spray can propellants because they do not alter the material being sprayed) | |
| freoon | freon (Trade name for a group of polyhalogenated hydrocarbons containing fluorine and chlorine; an example is trichlorofluoromethane) | |
| fumigatsioon | fumigation (The use of a chemical compound in a gaseous state to kill insects, nematodes, arachnids, rodents, weeds, and fungi in confined or inaccessible locations; also used to control weeds, nematodes, and insects in the field) | |
| furaan | furan (A colourless flammable toxic liquid heterocyclic compound, used in the synthesis of nylon) | |
| füsioloogia | physiology (The biological study of the functions of living organisms and their parts) | |
| füsioloogilis-biokeemiline tunnus | biomarker (A normal metabolite that, when present in abnormal concentrations in certain body fluids, can indicate the presence of a particular disease or toxicological condition) | |
| fütomass | phytomass (Plant biomass; any quantitative estimate of the total mass of plants in a stand, population, or within a given area, at a given time) | |
| fütopatoloogia | phytopathology (The study of plant diseases and their control) | |
| fütoplankton | phytoplankton (Planktonic plant life) | |
| fütosotsioloogia | phytosociology (The study of vegetation, including the organization, interdependence, development, geographical distribution and classification of plant communities) | |
| fütotoksilisus | phytotoxicity | |
| fütotsönoos | plant community (Any group of plants belonging to a number of different species that co-occur in the same habitat or area and interact through trophic and spatial relationships; typically characterized by reference to one or more dominant species) | |
| füüsika | physics (The study of those aspects of nature which can be understood in a fundamental way in terms of elementary principles and laws) | |
| füüsikaline käitlus | physical treatment (Processes that separate components of a waste stream or change the physical form of the waste without altering the chemical structure of the constituent materials. Physical treatment techniques are often used to separate the materials within the waste stream so that they can be reused or detoxified by chemical or biological treatment or destroyed by high-temperature incineration) | |
| füüsikaline keemia | physical chemistry (A science dealing with the effects of physical phenomena on chemical properties) | |
| füüsikaline omadus | physical property (Property of a compound that can change without involving a change in chemical composition) |