propionaldehyden.

Brit.

/ˌprəʊpɪəˈnaldᵻhʌɪd/, U.S.

/ˈˌproʊpiəˈnældəˌhaɪd/

Origin: Formed within English, by compounding; modelled on a German lexical item. Etymons: propionic adj., aldehyde n.

Etymology: < propion- (in propionic adj.) + aldehyde n., after German Propionaldehyd (1854 or earlier). Compare earlier propionic aldehyde n. at propionic adj. 1b.

Chemistry.

A colourless, acrid, liquid aldehyde, obtained by dehydration of glycerol. Also called propanal, propionic aldehyde, propyl aldehyde.Formula: CH₃CH₂CHO.

ΚΠ

1874 C. Schorlemmer Man. Chem. Carbon Compounds 150 On oxidation it [sc. propyl alcohol] yields propionaldehyde, C₃H₆O.

1893 Jrnl. Amer. Chem. Soc. 15 705 Propionaldehyde, CH₃CH₂COH in which the carbon atom which is linked to the aldehyde group is combined with only two hydrogen atoms.

1932 Org. Syntheses 12 64 The propionaldehyde which collects in the receiver is dried with 5 g. of anhydrous sodium sulfate and fractionally distilled.

1977 Adv. Org. Chem. (ed. 2) iv. 127 Propionaldehyde (or any similar molecule) has four extreme conformations, two of which are called eclipsing and..the other two bisecting.

2003 AIHA Jrnl. 64 388 The results show that the..smokers had significantly higher levels of acetaldehyde, propionaldehyde, and hexaldehyde than the nonsmokers.

This is a new entry (OED Third Edition, June 2007; most recently modified version published online March 2022).

单词	propionaldehyde
释义	propionaldehyden. Brit. /ˌprəʊpɪəˈnaldᵻhʌɪd/, U.S. /ˈˌproʊpiəˈnældəˌhaɪd/ Origin: Formed within English, by compounding; modelled on a German lexical item. Etymons: propionic adj., aldehyde n. Etymology: < propion- (in propionic adj.) + aldehyde n., after German Propionaldehyd (1854 or earlier). Compare earlier propionic aldehyde n. at propionic adj. 1b. Chemistry. A colourless, acrid, liquid aldehyde, obtained by dehydration of glycerol. Also called propanal, propionic aldehyde, propyl aldehyde.Formula: CH₃CH₂CHO. ΚΠ 1874 C. Schorlemmer Man. Chem. Carbon Compounds 150 On oxidation it [sc. propyl alcohol] yields propionaldehyde, C₃H₆O. 1893 Jrnl. Amer. Chem. Soc. 15 705 Propionaldehyde, CH₃CH₂COH in which the carbon atom which is linked to the aldehyde group is combined with only two hydrogen atoms. 1932 Org. Syntheses 12 64 The propionaldehyde which collects in the receiver is dried with 5 g. of anhydrous sodium sulfate and fractionally distilled. 1977 Adv. Org. Chem. (ed. 2) iv. 127 Propionaldehyde (or any similar molecule) has four extreme conformations, two of which are called eclipsing and..the other two bisecting. 2003 AIHA Jrnl. 64 388 The results show that the..smokers had significantly higher levels of acetaldehyde, propionaldehyde, and hexaldehyde than the nonsmokers. This is a new entry (OED Third Edition, June 2007; most recently modified version published online March 2022). < n.1874
随便看	to break her sheer to break herd to break in to break in(to fitters to bumble along to bump along the bottom to bump and bore to bump into to bump nasties to bump off to bump pussies to bump uglies to bump up to bung up the eyes to bunk down to bunk it to burden out to burn a bowl to burn a building down to burn a country tire-room tire-screw tire-setter tire-shrinker tire-smith