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Related Concept Videos

Microbes in Food Production01:29

Microbes in Food Production

Microbial fermentation is central to food biotechnology, enhancing flavor, texture, preservation, and stability. Fermentative microorganisms metabolize carbohydrates into organic acids, alcohols, and other metabolites that inhibit spoilage organisms and improve digestibility while contributing distinctive sensory qualities.In baking, amylases naturally present in flour hydrolyze starch into monosaccharides such as glucose, which Saccharomyces cerevisiae ferments anaerobically. Through...
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Pasteurization and Food Preservation

Pasteurization is a widely employed thermal processing technique designed to enhance the safety and shelf life of perishable food and beverages. By subjecting products to specific high temperatures for controlled durations, this method effectively inactivates pathogenic microorganisms and spoilage enzymes without significantly compromising sensory qualities. The technique has been pivotal in food safety management, especially for consumables susceptible to microbial contamination such as milk,...
Qualitative Analysis03:46

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For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique involves a series of selective precipitations with different chemical reagents, each reaction producing a characteristic precipitate for a specific group of cations. Metal ions within a group are further separated by varying the pH, heating the mixture to redissolve a precipitate, or adding other reagents to form complex ions.
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Microbiologically Influenced Corrosion (MIC) is a significant form of material degradation caused by the metabolic activities of microorganisms. This phenomenon poses substantial challenges across various industries, including oil and gas, maritime, and water treatment sectors.MIC occurs when microorganisms, such as bacteria, archaea, and fungi, colonize metal surfaces, forming biofilms that alter the local electrochemical environment. These biofilms can lead to the production of corrosive...

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Related Experiment Video

Updated: Jun 28, 2026

Electrochemical Preparation of Poly(3,4-Ethylenedioxythiophene) Layers on Gold Microelectrodes for Uric Acid-Sensing Applications
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Volatile sulphur compounds in UHT milk.

Z Al-Attabi1, B R D'Arcy, H C Deeth

  • 1School of Land, Crop, and Food Sciences, The University of Queensland, St Lucia, Qld, Australia.

Critical Reviews in Food Science and Nutrition
|October 25, 2008
PubMed
Summary
This summary is machine-generated.

Volatile sulfur compounds in milk increase during heat processing, impacting flavor. Advanced analytical methods like SPME-GC are improving detection of these compounds, aiding research into reducing undesirable cooked notes.

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Area of Science:

  • Food Chemistry
  • Analytical Chemistry
  • Dairy Science

Background:

  • Volatile sulfur compounds (VSCs) are present in raw and processed milk.
  • Heat processing, especially Ultra-High Temperature (UHT) and sterilization, increases VSCs.
  • These VSCs contribute to the 'cooked' flavor, reducing consumer acceptance.

Purpose of the Study:

  • To review the occurrence of VSCs in milk.
  • To compare methods for extracting and analyzing VSCs.
  • To understand the origin of VSCs and methods to mitigate their impact on milk flavor.

Main Methods:

  • Review of existing literature on VSC analysis in milk.
  • Discussion of analytical techniques including gas chromatography (GC).
  • Highlighting pre-concentration methods like solid phase microextraction (SPME) coupled with sulfur-selective detectors.

Main Results:

  • Identified VSCs include hydrogen sulfide, methanethiol, and dimethyl sulfide.
  • Many VSCs increase during heat treatment, correlating with cooked flavor.
  • Improved analytical methods enable detection of low VSC concentrations.

Conclusions:

  • Understanding VSC formation is crucial for improving processed milk quality.
  • Advanced analytical techniques are essential for accurate VSC quantification.
  • Further research can lead to strategies for reducing undesirable cooked flavors in milk.