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chemical+substance

  • 1 catalyst

    [kætəlist]
    1) (a substance which causes or assists a chemical change in another substance without itself undergoing any permanent chemical change.) καταλύτης
    2) (someone or something that helps bring about a change.) καταλύτης
    •

    English-Greek dictionary > catalyst

  • 2 chemistry

    ['kemistri] 1. noun
    ((the science that deals with) the nature of substances and the ways in which they act on, or combine with, each other: Chemistry was his favourite subject; the chemistry of the blood.) χημεία
    2. noun
    (a substance used in or obtained by a chemical process: Some chemicals give off harmful fumes.) χημική ουσία

    English-Greek dictionary > chemistry

  • 3 compound

    I 1. adjective
    (composed of a number of parts: a compound substance.) σύνθετος
    2. noun
    (a substance, word etc formed from two or more elements: The word racetrack is a compound; chemical compounds.) σύνθετη λέξη/ χημική ένωση
    II noun
    (a fenced or walled-in area, eg round a factory, school etc.) περίφρακτος χώρος, περίβολος

    English-Greek dictionary > compound

  • 4 extract

    1. [ik'strækt] verb
    1) (to pull out, or draw out, especially by force or with effort: I have to have a tooth extracted; Did you manage to extract the information from her?) εξάγω,αποσπώ
    2) (to select (passages from a book etc).) διαλέγω
    3) (to take out (a substance forming part of something else) by crushing or by chemical means: Vanilla essence is extracted from vanilla beans.) εξάγω, εκχυλίζω
    2. ['ekstrækt] noun
    1) (a passage selected from a book etc: a short extract from his novel.) απόσπασμα
    2) (a substance obtained by an extracting process: beef/yeast extract; extract of malt.) εκχύλισμα
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    English-Greek dictionary > extract

  • 5 element

    ['eləmənt]
    1) (an essential part of anything: Sound teaching of grammar is one of the elements of a good education.) στοιχείο
    2) (a substance that cannot be split by chemical means into simpler substances: Hydrogen, chlorine, iron and uranium are elements.) στοιχείο(χημικό)
    3) (surroundings necessary for life: Water is a fish's natural element.) περιβάλλον
    4) (a slight amount: an element of doubt.) ίχνος
    5) (the heating part in an electric kettle etc.) ηλεκτρική αντίσταση
    •
    - elements
    - in one's element

    English-Greek dictionary > element

  • 6 insoluble

    [in'soljubl]
    1) ((of a substance) impossible to dissolve: This chemical is insoluble (in water).) αδιάλυτος
    2) ((of a problem or difficulty) impossible to solve.) άλυτος
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    English-Greek dictionary > insoluble

  • 7 synthetic

    [sin'Ɵetik]
    noun, adjective ((a substance) produced artificially by a chemical process: nylon and other synthetic materials / synthetics.) συνθετικός

    English-Greek dictionary > synthetic

См. также в других словарях:

  • Chemical substance — Chemical redirects here. For other uses, see Chemical (disambiguation). Steam and liquid water are two different forms of the same chemical substance, water. In chemistry, a chemical substance is a form of matter that has constant chemical… …   Wikipedia

  • chemical substance — index drug Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

  • chemical substance — cheminė medžiaga statusas Aprobuotas sritis aplinkos apsauga apibrėžtis Natūralus ar dirbtinis cheminis elementas arba cheminių elementų junginys, įskaitant priedus, reikalingus gaminio stabilumui išlaikyti, ir priemaišas, atsirandančias gaminant …   Lithuanian dictionary (lietuvių žodynas)

  • chemical substance — cheminė medžiaga statusas T sritis chemija apibrėžtis Bet kuris cheminis elementas ar junginys, egzistuojantis natūraliai arba pagamintas. atitikmenys: angl. chemical substance rus. химическое вещество …   Chemijos terminų aiškinamasis žodynas

  • chemical substance — cheminė medžiaga statusas T sritis ekologija ir aplinkotyra apibrėžtis Natūralus arba gamybos procese gautas cheminis elementas ar jų junginys, įskaitant priedus, reikalingus tų gaminių stabilumui išlaikyti ir visas gamybos procese atsirandančias …   Ekologijos terminų aiškinamasis žodynas

  • chemical substance — noun material produced by or used in a reaction involving changes in atoms or molecules • Syn: ↑chemical • Derivationally related forms: ↑chemical (for: ↑chemical) • Hypernyms: ↑material, ↑ …   Useful english dictionary

  • chemical substance — noun A material with a specific chemical composition …   Wiktionary

  • classification of chemical substance and preparation — cheminių medžiagų ir preparatų klasifikavimas statusas Aprobuotas sritis aplinkos apsauga apibrėžtis Cheminių medžiagų ir preparatų priskyrimas vienai ar daugiau pavojingumo kategorijų pagal jų savybes bei priskyrimas cheminei medžiagai ir… …   Lithuanian dictionary (lietuvių žodynas)

  • Chemical energy — is the potential of a chemical substance to undergo a transformation through a chemical reaction or, to transform other chemical substances. Breaking or making of chemical bonds involves energy, which may be either absorbed or evolved from a… …   Wikipedia

  • Chemical stability — when used in the technical sense in chemistry, means thermodynamic stability of a chemical system.[1] Thermodynamic stability occurs when a system is in its lowest energy state, or chemical equilibrium with its environment. This may be a dynamic… …   Wikipedia

  • Chemical thermodynamics — is the study of the interrelation of heat and work with chemical reactions or with physical changes of state within the confines of the laws of thermodynamics. Chemical thermodynamics involves not only laboratory measurements of various… …   Wikipedia

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