Trace amounts

См. также в других словарях:

• Trace radioisotope — A trace radioisotope is a radioisotope that occurs naturally in trace amounts (i.e. extremely small). This natural formation can be from the decay of heavier nuclei such as uranium 235 decaying into thorium 231. Natural occurrence of… …   Wikipedia

• Trace evidence — contends that every contact, no matter how slight, will leave a trace. The trace is normally caused by objects or substances contacting one another, and leaving a minute sample on the contact surfaces. Material is often transferred by heat… …   Wikipedia

• trace element — trace elements 1) N COUNT A trace element is a chemical element such as iron or zinc that occurs in very small amounts in living things and is necessary for normal growth and development. 2) N COUNT A trace element is a very small amount of a… …   English dictionary

• trace element — trace′ el ement n. 1) biochem. any chemical element that is required in minute quantities for physiological functioning 2) mir a substance that occurs naturally only in minute amounts in the earth s crust Also called trace′ min eral. Etymology:… …   From formal English to slang

• trace element — trace .element n technical 1.) a chemical ↑element that your body needs a very small amount of to live 2.) a chemical ↑element that only exists in small amounts on Earth …   Dictionary of contemporary English

• trace element — ► NOUN ▪ a chemical element present or required only in minute amounts …   English terms dictionary

• trace — 1. v. & n. v.tr. 1 a observe, discover, or find vestiges or signs of by investigation. b (often foll. by along, through, to, etc.) follow or mark the track or position of (traced their footprints in the mud; traced the outlines of a wall). c… …   Useful english dictionary

• trace element — UK / US noun [countable] Word forms trace element : singular trace element plural trace elements 1) biology a chemical element that a living thing needs in only extremely small amounts in order to grow and develop normally, for example iron or… …   English dictionary

• trace element — Biochem. any element that is required in minute quantities for physiological functioning. Also called trace mineral. [1935 40] * * * ▪ biology also called  Micronutrient,         in biology, any chemical element required by living organisms in… …   Universalium

• trace element — A chemical found in very small amounts in a given substance. Organisms need certain trace elements to survive …   English dictionary of cancer terms

• trace element — noun a) A chemical element present in a sample in very small quantities. b) A chemical element in an organism’s diet that is required in very small amounts in order to maintain proper biochemical function; a micronutrient. Syn: micronutrient …   Wiktionary