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Year: 2008 Volume: 73 Issue: 3

Year: 2008 Volume: 73 Issue: 2

Year: 2008 Volume: 73 Issue: 1

Year: 2007 Volume: 72

A model stomach system to investigate disintegration kinetics of solid foods during gastric digestion.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Kong, F. Singh, R. P.
Description	Country affiliation: United States Author Affiliation: Kong F ( Departmentt of Biological and Agricultural Engineering, University of California, Davis, CA 95616, USA.)
Abstract	Knowledge of the disintegration kinetics of food particulates in the human stomach is essential for assessing the bioaccessibility of nutrients in solid foods and understanding stomach emptying. The objective of this study was to develop a model stomach system and to investigate the kinetics of food disintegration. Our system consisted mainly of a turntable and a jacketed glass chamber containing simulated gastric juice in which plastic beads were added to simulate food particulates as well as provide a suitable mechanical destructive force on food samples. The mechanical force on the samples was simultaneously measured using the load cell of a TA-XT2 texture analyzer. Cylindrical carrots and ham samples were used as representative foods. The system is capable of simulating the in vivo stomach in terms of providing a wide range of continuous and periodic forces comparable to those measured in vivo. The modified power exponential function of the form y(t)= 1 - (1 -e(-kt))(beta), where y(t) is the mass retention ratio at time t, provided a reasonable description for the disintegration performance of tested foods. The mass retention curve can be either a sigmoidal decay with an initial delay or an exponential decay, which are decided largely by the hardness of the foods during digestion and the extent of physical force acting on the foods. A good match was observed between the kinetics of food disintegration and in vivo stomach emptying.
File Format	HTM / HTML
ISSN	00221147
Issue Number	5
Volume Number	73
e-ISSN	17503841
Journal	Journal of Food Science
Language	English
Publisher	Wiley (on behalf ofInstitute of Food Technologists)
Publisher Date	2008-06-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Food science Digestion Physiology Gastric Emptying Models, Biological Stomach Metabolism Biological Availability Gastrointestinal Transit Humans Kinetics Particle Size Journal Article
Content Type	Text
Resource Type	Article
Subject	Food Science

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