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| Terms for subject Environment (6279 entries) |
| látka minerální | mineral matter (Inorganic materials having a distinct chemical composition, characteristic crystalline structure, colour, and hardness) | |
| látka mutagenní | mutagenic substance (Agents that induce a permanent change in the genetic material) | |
| látka nebezpečná | hazardous substance (Any material that poses a threat to human health and/or the environment. Typical hazardous substances are toxic, corrosive, ignitable, explosive, or chemically reactive) | |
| látka nebezpečná pro prostředí životní | environmentally dangerous substance (Substance that causes undesirable change in the physical, chemical, or biological characteristics of the air, water, or land that can harmfully affect the health, survival, or activities of human or other living organisms) | |
| látka nerozpustná | insoluble substance (Substance incapable of forming a solution, especially in water) | |
| látka netěkavá | non-volatile substance (Substance that is not capable of changing from a solid or liquid form to a vapour) | |
| látka odbouratelná obtížně | weakly degradable substance (A substance that is not easily converted to another, usually less complex compound) | |
| látka ohnivzdorná | fireproofing agent (A chemical used as a coating for or a component of a combustible material to reduce or eliminate a tendency to burn; used with textiles, plastics, rubbers, paints, and other materials) | |
| látka organická | organic matter (Plant and animal residue that decomposes and becomes a part of the soil) | |
| látka organická | organic substance (Chemical compounds, based on carbon chains or rings and also containing hydrogen with or without oxygen, nitrogen, or other elements) | |
| látka organická nerozložitelná | persistent organic pollutant | |
| látka organická těkavá | volatile organic compound (Organic compound readily passing off by evaporation) | |
| látka partikulární usazená | deposited particulate matter | |
| látka plynná znečišťující ovzduší | gaseous air pollutant (Uncondensed or volatile gases, usually comprised of chemical compounds, discharged to the atmosphere) | |
| látka povrchově aktivní | detergent (A surface-active agent used for removing dirt and grease from a variety of surfaces and materials. Early detergents contained alkyl sulphonates, which proved resistant to bacterial decomposition, causing foaming in rivers and difficulties in sewage treatment plants. These hard detergents were replaced during the 1960s with soft biodegradable detergents. Apprehension continues to be expressed about the use of phosphates in detergents, helping to promote the process of eutrophication. No satisfactory substitute has yet emerged) | |
| látka povrchově aktivní | surface-active agent (A substance that, when used in small quantities, modifies the surface properties of liquids or solids. A surface-active agent reduces surface tension in a fluid or the interfacial tension between two immiscible fluids, such as oil and water. Surfactants are particularly useful in accomplishing the wetting or penetration of solids by aqueous liquids and serve in the manner of detergent, emulsifying, or dispersing agents. They are more effective than soap in certain situations and are used by conservators for such purposes as cleaning, wetting, and dispersing) | |
| látka povrchově aktivní syntetická | synthetic detergent (An artificially produced solid or liquid cleansing substance that acts like soap but is stronger, and is capable of dissolving oily materials and dispersing them in water) | |
| látka přídavná | additive (Substances mixed in small quantities with another product to modify its chemical or physical state. Additives are used to make food look visually more attractive, in the case of colouring agents, as well as to preserve and extend the life of the product) | |
| látka radioaktivní | radioactive substance (Any substance that contains one or more radionuclides of which the activity or the concentration cannot be disregarded as far as radiation protection is concerned) | |
| látka stopová | trace material (1. Both metals and non-metals, essential for the metabolic processes of algae, invertebrates and vertebrates. Organisms that derive nearly all their energy via photosynthesis are especially dependent upon dissolved trace substances. 2. Impurities that are present at small but detectable levels) |