Coffee is the second largest traded commodity in the world, next to crude oil. It’s also one of the oldest commodities, with over 2.25 billion cups of coffee consumed worldwide daily.
FLUORESCEIN
fluorescein, fluoresceine, fluorescent dye, resorcinolphthalein
(noun) a yellow dye that is visible even when highly diluted; used as an absorption indicator when silver nitrate solution is added to sodium chloride in order to precipitate silver chloride (turns pink when no chloride ions are left in solution and negative fluorescein ions are then absorbed)
Source: WordNet® 3.1
Etymology
Noun
fluorescein (plural fluoresceins)
(chemistry) Any of a class of yellow xanthene dyes which are visible when highly diluted; used forensically to detect traces of blood, and in analytical chemistry as an indicator in silver nitrate titrations
Synonyms
• fluoresceine
• resorcinolphthalein
Source: Wiktionary
Flu`o*res"ce*in, n. (Chem.)
Definition: A yellowish red, crystalline substance, C20H12O5, produced by heating together phthalic anhydride and resorcin; -- so called, from the very brilliant yellowish green fluorescence of its alkaline solutions. It has acid properties, and its salts of the alkalies are known to the trade under the name of uranin.
Source: Webster’s Unabridged Dictionary 1913 Edition
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5 February 2025
CARE
(noun) activity involved in maintaining something in good working order; “he wrote the manual on car care”
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