Consumer rejection threshold of ethyl phenylacetate and phenylacetic acid, compounds responsible for the sweet-like off odour in wines made from sour rotten grapes

2012 ◽  
Vol 18 (3) ◽  
pp. 280-286 ◽  
Author(s):  
E. CAMPO ◽  
M.P. SAENZ-NAVAJAS ◽  
J. CACHO ◽  
V. FERREIRA
Keyword(s):  
Phenylacetic Acid ◽  
Rejection Threshold ◽  
Ethyl Phenylacetate

THE IONIZATION CONSTANTS OF p-NITROPHENYLACETIC AND PHENYLMALONIC ACIDS

1933 ◽  
Vol 8 (5) ◽  
pp. 447-449 ◽  
Author(s):  
Steward Basterfield ◽  
James W. Tomecko
Keyword(s):  
Benzoic Acid ◽  
Nitro Group ◽  
Malonic Acid ◽  
Phenylacetic Acid ◽  
Ionization Constants ◽  
Side Chain ◽  
Cooh Group ◽  
Conductivity Data ◽  
Nitrobenzoic Acid ◽  
Phenylmalonic Acid

The ionization constants of p-nitrophenylacetic and phenylmalonic acids have been determined from conductivity data. The value of K for p-nitrophenylacetic acid at 25 °C. is 1.04 × 10−4, about twice that of phenylacetic acid. The nitro group in the nucleus has not as powerful an effect on the ionization when the COOH group is in the side chain as it has when both nitro group and COOH are in the nucleus. K for p-nitrobenzoic acid is six times as great as K for benzoic acid. K for phenylmalonic acid is 2. 77 × 10−3 as compared with 1.6 × 10−3 for malonic acid.

scholarly journals Metallkomplexe in Anorganischen Matrices, 5 [1] / Metal Complexes in Inorganic Matrices, 5 [1]

1991 ◽  
Vol 46 (6) ◽  
pp. 783-788 ◽  
Author(s):  
Christian Egger ◽  
Ulrich Schubert
Keyword(s):  
Acetic Acid ◽  
Metal Complexes ◽  
Phenylacetic Acid ◽  
Sol Gel ◽  
Rhodium Complex ◽  
Gel Processing ◽  
Inorganic Matrices

A heterogenized rhodium complex, prepared by sol-gel processing of Rh(CO)Cl[PPh2CH2CH2Si(OEt)3]2 and Si(OEt)4, is shown to catalyze the conversion of the silanes H4-nSiPh„ (n = 1 - 3) or (HMe2Si)2O to (poly)siloxanes by air or water. Using THF as a solvent, the silanoles Ph3SiOH or Ph2Si(OH)2 are obtained instead. The reaction of phenylacetic acid or acetic acid with HSiPh3 to give silyl esters is catalyzed by the same compound.

Effects of raw materials and preparation methods of catalysts on the selective hydrogenation of ethyl phenylacetate

1996 ◽  
Vol 73 (4) ◽  
pp. 465-469 ◽  
Author(s):  
Kazuaki Ishii ◽  
Fujio Mizukami ◽  
Shu-ichi Niwa ◽  
Makoto Toba ◽  
Hirobumi Ushijima ◽  
...  
Keyword(s):  
Selective Hydrogenation ◽  
Raw Materials ◽  
Preparation Methods ◽  
Ethyl Phenylacetate

The effect of phenylacetic acid on cholinesterase activity and on some isoenzymes of esterases and cholinesterases of peain vitro

1986 ◽  
Vol 28 (2) ◽  
pp. 145-148 ◽  
Author(s):  
Rumjana Nikolova ◽  
L. Chovjka ◽  
Věra Hadačová ◽  
Věra Schejblová
Keyword(s):  
Phenylacetic Acid ◽  
Cholinesterase Activity
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