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Related Concept Videos

Colloids03:22

Colloids

Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
Colloids and Suspensions01:17

Colloids and Suspensions

Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles visible to the naked eye or seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. The suspended particles in a suspension settle out after some time of mixing. The separation of particles from a suspension is...
Shape and Texture of Coarse Aggregate01:25

Shape and Texture of Coarse Aggregate

Aggregate shape is classified based on the relative sharpness or roundness of the edges and corners. This classification includes categories like rounded, angular, elongated, and flaky, each with specific characteristics. Rounded aggregates, fully shaped by attrition, are typical of river or seashore gravel, while angular aggregates, such as crushed rock, have well-defined edges. Aggregates that are elongated and flaky are less desirable, as they can reduce the workability and strength of...
The Colloidal State01:29

The Colloidal State

The formation of a colloidal system is exemplified by an aqueous solution containing Cl− ions is introduced to another containing Ag+ ions, resulting in the precipitation of solid AgCl as extremely tiny crystals. Instead of settling out as a filterable precipitate, these crystals remain suspended in the liquid, showcasing a colloidal system.A colloidal system involves colloidal particles within the approximate range of 1 to 1000 nm in at least one dimension, dispersed in a medium called the...
Colloidal precipitates01:09

Colloidal precipitates

The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
Sensory Perception: Organization of the Somatosensory System01:11

Sensory Perception: Organization of the Somatosensory System

The somatosensory system is the central and peripheral nervous system component that senses and processes touch, pressure, pain, temperature, and body position or proprioception. The process of sensation takes place at three levels:
The receptor level:
The receptor level is the first stage of sensation. It involves the detection of a stimulus by specialized sensory receptors. The stimulus must arrive within the receptor's receptive field. Next, the receptor converts the energy of the stimulus...

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Assessment of Spatial Lingual Tactile Sensitivity using a Gratings Orientation Test
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Colloidal aspects of texture perception.

Ton van Vliet1, George A van Aken, Harmen H J de Jongh

  • 1TI Food and Nutrition (former WCFS) P.O. Box 557, 6700 AN Wageningen, The Netherlands. ton.vanvliet@wur.nl

Advances in Colloid and Interface Science
|May 22, 2009
PubMed
Summary
This summary is machine-generated.

Understanding food texture perception requires analyzing colloidal properties and oral processing. This research links food composition and structure to complex sensory attributes like creaminess and crispness across different food types.

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Area of Science:

  • Food Science and Technology
  • Colloid Science
  • Sensory Science

Background:

  • Food texture perception involves complex attributes (e.g., creamy, crumbly) influenced by oral processing and interactions with taste/aroma.
  • Linking food composition and structure to these attributes necessitates understanding physical/colloid chemistry and oral processing.
  • Colloidal processes in the mouth are crucial for understanding the interplay between perception, oral physiology, and food properties.

Purpose of the Study:

  • To explore colloidal aspects of texture perception in solid, semi-solid, and liquid food products.
  • To identify key factors influencing specific sensory attributes like crispness, spreadability, and creaminess.
  • To establish relationships between food properties at mesoscopic length scales and perceived texture.

Main Methods:

  • Categorization of food products into solid, semi-solid, and liquid based on physical-chemical properties.
  • Analysis of relevant colloidal processes and their impact on texture perception for each category.
  • Discussion of selected sensory attributes and their link to food structure and composition at mesoscopic scales.

Main Results:

  • For solid foods, crispness is determined by water content and mesoscopic architecture, including water distribution.
  • For semi-solid foods, spreadability, watery, and crumbliness are linked to mesoscopic properties, with crumbliness related to crack formation and watery attributes to liquid exudation.
  • For liquid foods, colloidal interactions with saliva influence creaminess, fattiness, roughness, and astringency.

Conclusions:

  • Understanding colloidal interactions and food structure at mesoscopic scales is essential for predicting complex texture perception.
  • Distinct colloidal mechanisms govern texture perception in solid, semi-solid, and liquid food categories.
  • This research provides a framework for linking food's physical-chemical properties to sensory attributes, aiding product development.