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Formation and Physical Properties of Milk Protein Gels
Open accessAbstract
Gelation of milk proteins is the crucial first step in both cheese and yogurt manufacture. Several types of milk gels are discussed, with an emphasis on recent developments in our understanding of how these gels are formed and some of their key physical properties. Areas discussed include the latest dual-binding model for casein micelles; some recent developments in rennet-induced gelation; review of the methods that have been used to monitor milk coagulation; and a discussion of some of the possible causes for the wheying-off defect in yogurts. Casein micelles are the primary building blocks of casein-based gels; however, controversy about its structure continues. The latest model proposed for the formation of casein micelles is the dual-binding model proposed by Horne, 1998, which suggests that casein micelles are formed as a result of two binding mechanisms, namely hydrophobic attraction and colloidal calcium phosphate (CCP) bridging. Most previous models for the casein micelle have treated milk gelation from the viewpoint of simple particle destabilization and aggregation, but they have not been able to explain several unusual rheological properties of milk gels. Although there have been many techniques used to monitor the milk gelation process over the past few decades, only a few appear attractive as possible in-vat coagulation sensors. Another important aspect of milk gels is the defect in yogurts called wheying-off, which is the appearance of whey on the gel surface. The factors responsible for its occurrence are still unclear, but they have been investigated in model acid gel systems.
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“Gel stiffness increases with a reduction in pH up to a maximum at pH 6.0 to 6.2; at lower pH values the stiffness decreases.”
From Invited review: perspectives on the basis of the rheology and texture properties of cheese. (2003) · cites this paper as Lucey, 2002
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Metadata
- Authors
- Lucey, J. A.
- Affiliations
- University of Wisconsin–Madison (US)
- Corresponding author
- Lucey, J.A.
- ORCID
- Lucey, J.A.
- Venue
- Journal of Dairy Science
- Publisher
- American Dairy Science Association
- Published
- 2002-02
- Volume
- 85
- Issue
- 2
- Pages
- 281-294
- ISSN
- 0022-0302 (ISSN-L)
- OpenAlex
- W2048203705
- Cited by
- 667
- References
- 107
- Citations by year
- 2026: 45 · 2025: 34 · 2024: 35 · 2023: 39 · 2022: 35 · 2021: 32 · 2020: 28 · 2019: 35 · 2018: 41 · 2017: 35 · 2016: 34 · 2015: 29 · 2014: 34 · 2013: 22 · 2012: 32
- FWCI
- 15.95
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Journal of Dairy Science (publishedVersion)
- PubMed (publishedVersion)
- Funders
- U.S. Department of Agriculture
- Cooperative State Research, Education, and Extension Service
- Topics
- Life Sciences › Agricultural and Biological Sciences › Food Science › Proteins in Food Systems
- Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Milk Quality and Mastitis in Dairy Cows
- Life Sciences › Agricultural and Biological Sciences › Food Science › Animal Diversity and Health Studies
- Keywords
- casein micelles, casein micelle structure, hydrophobic attraction, cheese production, gel rheology
- MeSH terms
- Whey Proteins, Animals, Awards and Prizes, Caseins, Cattle, Dairy Products, Dairying, Food Technology, Gels, Micelles, Milk, Milk Proteins, Models, Chemical, Rheology, Societies, Scientific, United States
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