| 释义 |
Definition of propionic acid in English: propionic acidnounˌprəʊpɪˈɒnɪkˌprōpēˌänik ˈasəd mass nounChemistry A colourless pungent liquid organic acid produced in some forms of fermentation and used for inhibiting the growth of mould in bread. 〔化〕丙酸 Alternative name: propanoic acid; chemical formula: C₂H₅COOH Example sentencesExamples - Two other simple carboxylic acids are propionic acid and butyric acid.
- Each population cage contained two standard 240-ml food bottles, each containing 50 ml of standard fly medium containing sucrose, corn meal, yeast, agar, benzoic acid, methyl paraben, and propionic acid.
- Such breads are almost always chock full of preservatives like sorbic acid and propionic acid, which help to ward off mold.
- Ovaries were gently pressed with a coverslip in 50% propionic acid, dipped in liquid nitrogen, and sequentially dehydrated in 50%, 70%, 95%, and 100% ethanol.
- Odors used included amyl acetate, which smells like bananas; phenyl ethyl alcohol, which smells like roses; propionic acid, which smells like vinegar; eugenol, which smells like cloves; and citral, which smells lemony.
OriginMid 19th century: propionic from French propionique, from Greek pro 'before' + piōn 'fat', it being the first member of the fatty acid series to form fats. Definition of propionic acid in US English: propionic acidnounˌprōpēˌänik ˈasəd Chemistry A colorless pungent liquid organic acid produced in some forms of fermentation and used for inhibiting the growth of mold in bread. 〔化〕丙酸 Alternative name: propanoic acid; chemical formula: C₂H₅COOH Example sentencesExamples - Odors used included amyl acetate, which smells like bananas; phenyl ethyl alcohol, which smells like roses; propionic acid, which smells like vinegar; eugenol, which smells like cloves; and citral, which smells lemony.
- Each population cage contained two standard 240-ml food bottles, each containing 50 ml of standard fly medium containing sucrose, corn meal, yeast, agar, benzoic acid, methyl paraben, and propionic acid.
- Two other simple carboxylic acids are propionic acid and butyric acid.
- Ovaries were gently pressed with a coverslip in 50% propionic acid, dipped in liquid nitrogen, and sequentially dehydrated in 50%, 70%, 95%, and 100% ethanol.
- Such breads are almost always chock full of preservatives like sorbic acid and propionic acid, which help to ward off mold.
OriginMid 19th century: propionic from French propionique, from Greek pro ‘before’ + piōn ‘fat’, it being the first member of the fatty acid series to form fats. |