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Related Concept Videos

Colloids03:22

Colloids

21.8K
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...
21.8K
The Colloidal State01:29

The Colloidal State

74
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...
74
Colloidal precipitates01:09

Colloidal precipitates

6.7K
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...
6.7K
Colloids and Suspensions01:17

Colloids and Suspensions

3.8K
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...
3.8K
Coagulation01:06

Coagulation

1.6K
Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
1.6K
Solubility03:00

Solubility

21.8K
Solution, Solubility, and Solubility Equilibrium
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules,...
21.8K

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Related Experiment Video

Updated: Mar 13, 2026

In vitro Digestion of Emulsions in a Single Droplet via Multi Subphase Exchange of Simulated Gastrointestinal Fluids
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Oral processing of emulsion systems from a colloidal perspective.

Anwesha Sarkar1, Aiqian Ye2, Harjinder Singh2

  • 1Food Colloids and Processing Group, School of Food Science and Nutrition, University of Leeds, LS2 9JT, UK. A.Sarkar@leeds.ac.uk.

Food & Function
|October 11, 2016
PubMed
Summary

This review explores how food emulsions break down in the mouth, focusing on colloidal changes. Understanding these interactions helps design better low-fat foods with a rich texture and improved sensory perception.

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Synthesis and Characterization of Supramolecular Colloids
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Area of Science:

  • Colloid and Surface Science
  • Food Science and Technology
  • Rheology and Oral Processing

Background:

  • Food emulsions undergo complex structural changes during oral processing.
  • Understanding these changes is crucial for predicting sensory perception and product texture.
  • Oral processing involves interactions with saliva, enzymes, and mechanical forces.

Purpose of the Study:

  • To review the colloidal mechanisms of food emulsion destabilization in the oral cavity.
  • To highlight the role of interfacial phenomena, electrostatic interactions, and enzymatic activity.
  • To provide insights for designing food products with enhanced sensory attributes.

Main Methods:

  • Colloidal analysis of microstructural changes in emulsions and emulsion gels.
  • Investigation of interactions between emulsion droplets and oral components (saliva, proteins, enzymes).
  • Review of surface-induced phenomena and their impact on emulsion stability.

Main Results:

  • Oral destabilization is governed by colloidal interactions, including electrostatic forces and enzymatic modifications.
  • Salivary components and oral shear significantly influence emulsion microstructure.
  • Interfacial engineering is key to controlling oral breakdown and sensory outcomes.

Conclusions:

  • Understanding oral processing of emulsions requires a colloidal perspective.
  • Insights into interfacial engineering and oral breakdown can guide the design of low-fat, full-fat sensation products.
  • Microstructural analysis aids in developing novel food products with tailored sensory and textural properties.