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In vitro simulation of the oral processing of semi-solid foods

The intra-oral processing of semi-solids foods is dominated by effects due to tongue movement. These movements subject the food to shear forces and mix it with saliva. Both actions tend to reduce the viscosity of the products. These changes are perceived as “melting” by sensory panellists. In a prev...

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Published in:Food hydrocolloids 2007, Vol.21 (3), p.397-401
Main Authors: Prinz, J.F., Janssen, A.M., de Wijk, R.A.
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Language:English
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creator Prinz, J.F.
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description The intra-oral processing of semi-solids foods is dominated by effects due to tongue movement. These movements subject the food to shear forces and mix it with saliva. Both actions tend to reduce the viscosity of the products. These changes are perceived as “melting” by sensory panellists. In a previous study where subjects were trained to use a variety of intra-oral manipulation it was shown that the amount of tongue movement was an important factor in determining the sensory experience of the products. The goal of this study was to develop a system which could measure changes in viscosity due to temperature, shear, dilution and structure breakdown, monitor the rate of and extent of mixing, mimic the pattern of mixing extant in the mouth. Simulation requires that shear forces, mixing and thermal effects be mimicked faithfully. To compare samples recovered from the mouth with those mixed in the simulator we compare the amount of mixing as measured using an image-processing technique. The simulator allows the effects of shear, dilution, and α-amylase concentration on the rheology and heterogeneity of the product to be monitored in real time. By way of example the effects of dilution, shear and chemical breakdown are compared in a starch-based semi-solid food.
doi_str_mv 10.1016/j.foodhyd.2006.04.009
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source ScienceDirect Journals
subjects alpha-amylase
Biological and medical sciences
chemical structure
chewing gum
Custard
digestive physiology
Food additives
Food industries
food quality
foods
Fundamental and applied biological sciences. Psychology
General aspects
human mastication
humans
image analysis
Image processing
in vitro studies
inhibition
mastication
mixing
Oral processing
perception
Rheology
Saliva
salivary amylase
sampling
semi-solid foods
sensation
shear strength
simulation models
solids
starch
temperature
texture
thermal properties
viscosity
water
title In vitro simulation of the oral processing of semi-solid foods
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