Document Detail

Isothermal and non-isothermal kinetic models of chemical processes in foods governed by competing mechanisms.
MedLine Citation:
PMID:  19637869     Owner:  NLM     Status:  MEDLINE    
A process or reaction that peaks at high temperatures but not at low ones indicates competition between synthesis and degradation. A proposed phenomenological model composed of a decay factor superimposed on a growth term can describe both. Temperature elevation shortens the two subprocesses' characteristic times and increases their rates. The degradation's characteristic time relative to the experiment's determines whether a peak is observed. All of the parameters determine the peak's height and shape as can be seen in two interactive Wolfram demonstrations on the Web. Detailed knowledge of the underlying mechanisms is unnecessary for the model's construction, and uniqueness is not a prerequisite either. However, different expressions might be needed for ongoing processes and ones initially undetectable. The model's applicability is demonstrated with published results on very different reactions in foods. In principle, it can be converted into a dynamic rate equation for simulating a process's evolution under non-isothermal conditions.
Micha Peleg; Maria G Corradini; Mark D Normand
Related Documents :
2664599 - Food sensitivities and psychological disturbance: a review.
2213379 - Patterns of food hypersensitivity during sixteen years of double-blind, placebo-control...
22062559 - The effect of modified atmosphere packaging with carbon monoxide on the storage quality...
8730159 - High dissociation constants (pka) of basic permeants are associated with in vivo skin i...
18054439 - Liver fattening during feast and famine: an evolutionary paradox.
23154219 - Watching a food-related television show and caloric intake: a laboratory study.
25454149 - Thin-layer chromatography/direct analysis in real time time-of-flight mass spectrometry...
17430909 - Innovative active packaging systems to prolong the shelf life of mozzarella cheese.
17145709 - Vectorbase: a home for invertebrate vectors of human pathogens.
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  57     ISSN:  1520-5118     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2009 Aug 
Date Detail:
Created Date:  2010-03-30     Completed Date:  2010-07-15     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  7377-86     Citation Subset:  IM    
Department of Food Science, University of Massachusetts, Amherst, Massachusetts 01003, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Chemical Processes*
Food Analysis*
Hot Temperature
Models, Theoretical

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Nickel-catalyzed ring-opening hydroacylation of methylenecyclopropanes: synthesis of gamma,delta-uns...
Next Document:  Multiphoton writing of three-dimensional fluidic channels within a porous matrix.