Effect of electrolytes on the kinetics of thiamine loss in model systems of high water activity

The influence of different electrolytes (NaCl, KCl and Na2SO4) on the kinetics of thiamine degradation in model systems of reduced water activity (aw = 0·95), at pH values of 4·0 and 5·5 and at different processing temperatures (80°C, 90°C and 100°C) was studied. In all cases a first order reaction...

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Autores principales: Mauri, L.M., Alzamora, S.M., Tomio, J.M.
Formato: JOUR
Materias:
electrolyte
potassium chloride
sodium chloride
sodium sulfate
thiamine
water
article
degradation
food composition
food preservation
kinetics
model
ph
temperature
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_03088146_v45_n1_p19_Mauri
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_03088146_v45_n1_p19_Mauri
record_format dspace
spelling todo:paper_03088146_v45_n1_p19_Mauri2023-10-03T15:22:58Z Effect of electrolytes on the kinetics of thiamine loss in model systems of high water activity Mauri, L.M. Alzamora, S.M. Tomio, J.M. electrolyte potassium chloride sodium chloride sodium sulfate thiamine water article degradation food composition food preservation kinetics model ph temperature The influence of different electrolytes (NaCl, KCl and Na2SO4) on the kinetics of thiamine degradation in model systems of reduced water activity (aw = 0·95), at pH values of 4·0 and 5·5 and at different processing temperatures (80°C, 90°C and 100°C) was studied. In all cases a first order reaction kinetics for thiamine degradation was confirmed. The strong influence of temperature and pH on the rates of degradation was evident. The adjustment of aw with electrolytes, particularly NaCl or KCI, exerts a protective effect on thiamine destruction, compared with a buffer system (without solute addition) or with systems containing non-electrolytes. Activation energies seemed to be independent of the type of solute and ranged from 27 to 29 kcal mole-1. © 1992. Fil:Mauri, L.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Alzamora, S.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Tomio, J.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03088146_v45_n1_p19_Mauri
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic electrolyte
potassium chloride
sodium chloride
sodium sulfate
thiamine
water
article
degradation
food composition
food preservation
kinetics
model
ph
temperature
spellingShingle electrolyte
potassium chloride
sodium chloride
sodium sulfate
thiamine
water
article
degradation
food composition
food preservation
kinetics
model
ph
temperature
Mauri, L.M.
Alzamora, S.M.
Tomio, J.M.
Effect of electrolytes on the kinetics of thiamine loss in model systems of high water activity
topic_facet electrolyte
potassium chloride
sodium chloride
sodium sulfate
thiamine
water
article
degradation
food composition
food preservation
kinetics
model
ph
temperature
description The influence of different electrolytes (NaCl, KCl and Na2SO4) on the kinetics of thiamine degradation in model systems of reduced water activity (aw = 0·95), at pH values of 4·0 and 5·5 and at different processing temperatures (80°C, 90°C and 100°C) was studied. In all cases a first order reaction kinetics for thiamine degradation was confirmed. The strong influence of temperature and pH on the rates of degradation was evident. The adjustment of aw with electrolytes, particularly NaCl or KCI, exerts a protective effect on thiamine destruction, compared with a buffer system (without solute addition) or with systems containing non-electrolytes. Activation energies seemed to be independent of the type of solute and ranged from 27 to 29 kcal mole-1. © 1992.
format JOUR
author Mauri, L.M.
Alzamora, S.M.
Tomio, J.M.
author_facet Mauri, L.M.
Alzamora, S.M.
Tomio, J.M.
author_sort Mauri, L.M.
title Effect of electrolytes on the kinetics of thiamine loss in model systems of high water activity
title_short Effect of electrolytes on the kinetics of thiamine loss in model systems of high water activity
title_full Effect of electrolytes on the kinetics of thiamine loss in model systems of high water activity
title_fullStr Effect of electrolytes on the kinetics of thiamine loss in model systems of high water activity
title_full_unstemmed Effect of electrolytes on the kinetics of thiamine loss in model systems of high water activity
title_sort effect of electrolytes on the kinetics of thiamine loss in model systems of high water activity
url http://hdl.handle.net/20.500.12110/paper_03088146_v45_n1_p19_Mauri
work_keys_str_mv AT maurilm effectofelectrolytesonthekineticsofthiaminelossinmodelsystemsofhighwateractivity
AT alzamorasm effectofelectrolytesonthekineticsofthiaminelossinmodelsystemsofhighwateractivity
AT tomiojm effectofelectrolytesonthekineticsofthiaminelossinmodelsystemsofhighwateractivity
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