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Medicinal plants on verge of extinction - La Leva di Archimede (ENG) laleva.org | for Unlearning Old Behaviors: Extinction - Online Self-Help Book... mentalhelp.net | Many Plants' Species Close to Extinction annieappleseedproject.org | ProtScale Tool: Retention coefficient in TFA. expasy.org |
Extinction coefficient refers to several different measures of the absorption of light in a medium:
(For the quantitative relationship between the chemistry and physics definitions, see Mathematical descriptions of opacity.)
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