butyric acid

(redirected from butyric)
Also found in: Dictionary, Thesaurus, Medical.
Related to butyric: butyric anhydride, Indole-3-butyric acid

butyric acid

(byo͞otĭr`ĭk) or

butanoic acid

(byo͞otənō`ĭk), CH3CH2CH2CO2H, viscous, foul-smelling, liquid carboxylic acid; m.p. about −5°C;; b.p. 163.5°C;. It is miscible with water, ethanol, and ether. It is a low molecular weight fatty acidfatty acid,
any of the organic carboxylic acids present in fats and oils as esters of glycerol. Molecular weights of fatty acids vary over a wide range. The carbon skeleton of any fatty acid is unbranched. Some fatty acids are saturated, i.e.
..... Click the link for more information.
 that is present in butter as an ester of glycerol; the odor of rancid butter is due largely to the presence of free butyric acid. Butyric acid is used in the manufacture of plastics. Isobutyric acid, or 2-methylpropanoic acid, (CH3)2CHCO2H, is a geometric isomerisomer
, in chemistry, one of two or more compounds having the same molecular formula but different structures (arrangements of atoms in the molecule). Isomerism is the occurrence of such compounds. Isomerism was first recognized by J. J. Berzelius in 1827.
..... Click the link for more information.
 of the butyric acid described above; it has different physical properties but similar chemical properties.

Butyric Acid


a saturated monobasic carboxylic acid of the aliphatic series; a colorless liquid with a sharp, unpleasant odor, readily soluble in water and organic solvents.

Butyric acid has two known isomers: n-butyric acid, CH3CH2CH2COOH (boiling point, 163°C; density, 0.958 g/cm3 at 20°C); and isobutyric acid (CH3)2CHCOOH (boiling point, 155°C; density, 0.949 g/cm3 at 20°C). The first can be obtained by the oxidation of n-butanol or by the fermentation of waste products containing starch; the second, by the oxidation of isobutanol. Derivatives of n -butyric acid, or glycerides, are components of animal fats (for example, butter). Butyric acid esters, which have a fruity or floral odor, are of practical significance: certain types are used as aromatic principles in the perfume and food industries, and others as masticators in the preparation of varnishes.

butyric acid

[byü′tir·ik ′as·əd]
(organic chemistry)
CH3CH2CH2COOH A colorless, combustible liquid with boiling point 163.5°C (757 mmHg); soluble in water, alcohol, and ether; used in synthesis of flavors, in pharmaceuticals, and in emulsifying agents.
References in periodicals archive ?
12 (b) Acetic acid 1,602 (a) 1,615 (a) 868 (b) Propionic acid 327 (a) 296 (ab) 246 (b) Butyric acid 289 (a) 222 (ab) 185 (b) Iso-butyric acid 76 (a) 59 (a) 37 (b) Iso-valeric acid 146 (a) 116 (a) 69 (b) SCFA (1) 2,219 (a) 2,133 (a) 1,298 (b) BCFA (2) 222 (a) 175 (a) 106 (b) Items (mg/L) SEM SD Phenol 0.
The dressing percentage and abdominal fat content was influenced by the butyric acid treatments employed in the present study (Table 5).
Acetic and butyric acid proportions decreased slowly, and overall the proportion of propionic acid increased during ensiling (p<0.
DM = Dry matter; CP = Crude protein; WSC = Water-soluble carbohydrates; LA = Lactic acid; AA = Acetic acid; PA = Propionic acid; BA = Butyric acid.
The significant difference of butyric acid concentration between WHDG-containing and the control silages also indicated that the activity of clostridial organisms (which produce butyric acid) was inhibited by residual ethanol of WHDG.
It appeared that the molar proportions (mol/100 mol) of acetic-, propionic- and butyric acid were not significantly affected by the experimental silages used after feeding (Table 4).
These findings also add to our understanding of how addiction affects the brain because it demonstrates the unique concept that dual neurotransmitter modulation, by simultaneously augmenting the inhibitory action of gamma amino butyric acid and inhibiting the excitatory effects of glutamate, can result in therapeutic effects that reduce the propensity to use cocaine.
Butyric acid contents were relatively low, with the highest value in CAM (1.
STX209 is an oral selective gamma-amino butyric acid type B (GABA-B) receptor agonist.
Upon treating cultured human intestinal cells with oleic acid, the research team observed significant secretion of LPS together with the chylomicron particles, a phenomenon that was not observed when the cells were treated with short-chain butyric acid.
In their work, the investigators tested 10 compounds--diacetyl, butyric acid, methional and seven different lactones--in various matrices: 100% oil or deodorized water; a deodorized water-oil mix in ratios of 60:40 or 40:60; water with an emulsifier (T-maz 80 K); and in a pH 5.