✦ LIBER ✦

Kinetics of the thermal degradation of some phenolic acids

✍ Scribed by Tanchev, S. ;Ioncheva, N. ;Genov, N. ;Malchev, E.

Publisher: John Wiley and Sons
Year: 1979
Tongue: English
Weight: 218 KB
Volume: 23
Category: Article
ISSN: 0027-769X
DOI: 10.1002/food.19790230903

No coin nor oath required. For personal study only.

✦ Synopsis

Kinetics of the thermal degradation of the phenolic acids gallic and protocatechuic acid in 0,05 M citrate buffer at pH 3,4 and 5 and temperature 101, 11 I and 121 "C has been investigated. It has been established that the degradation is a first order reaction. The rate constants, half life period T , ! ~! factor Qlo, experimental activation energy E. and constant Z ["C], characterizing the temperature sensitivity have been calculated. The degradation of both the acids depends upon pH and temperature.

Phenolic acids play an important role in enhancing the biological value of fresh and preserved fruits and vegetables by their contribution as vitamin P. It has also been established that they are precursors of some aromatic substances, the effect of which is shown by the organoleptic examination of the preserved pro-

📜 SIMILAR VOLUMES

Thermal degradation of phenolic resins.

Thermal degradation of phenolic resins. V

✍ G. S. Learmonth; D. P. Searle 📂 Article 📅 1969 🏛 John Wiley and Sons 🌐 English ⚖ 277 KB 👁 2 views

Kinetics of the thermal degradation of B

Kinetics of the thermal degradation of Betanine

✍ Drdák, M. ;Vallová, M. 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 202 KB

The paper discussed thermal degradation of betanine, isolated on Sephadex G-25 and recrystallized from 0.1 % HCI. Model solutions of betanine (pH 5.0) were heated at 60.0, 65.5, 68.5, 72.5, 75.0, 76.5, 81.0, and 86.0 "C. Experimental values obtained were used for calculations of the reaction rate co

Kinetics of the thermal degradation of p

Kinetics of the thermal degradation of polypropylene fibres

✍ M. Gambiroža-Jukić; R. Čunko 📂 Article 📅 1992 🏛 John Wiley and Sons 🌐 English ⚖ 305 KB 👁 2 views

Mechanisms of thermal degradation of phe

Mechanisms of thermal degradation of phenolic condensation polymers. III. Cleavage of phenolic segments during the thermal degradation of uncured epoxy resins

✍ Lieng-Huang Lee 📂 Article 📅 1965 🏛 John Wiley and Sons 🌐 English ⚖ 467 KB 👁 2 views

Kinetic parameters of thermal degradatio

Kinetic parameters of thermal degradation of polyethylene glycol-toughened novolac-type phenolic resin

✍ Feng-Yih Wang; Chen-Chi M. Ma; Wen-Jia Wu 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 182 KB 👁 2 views

Kinetic analysis of the thermal degradat

Kinetic analysis of the thermal degradation of PVC plastisols

✍ A. Jimenez; J. Lopez; L. Torre; J. M. Kenny 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 221 KB 👁 2 views

The thermal degradation of plasticized polyvinyl chloride (plastisol) is reported here. Plastisols used in the present work were prepared with the plasticizer diethylhexyl phthalate in different proportions. Thermogravimetric analysis has been applied to study the behavior of plastisols at high temp