Encyclopedia of Membranes

2016 Edition
| Editors: Enrico Drioli, Lidietta Giorno

Fat Hydrolysis, Membrane Operations of

Reference work entry
DOI: https://doi.org/10.1007/978-3-662-44324-8_223

Lipids that are solid at room temperature are termed fats. In nature, most fats are triglycerides – consisting of a glycerol backbone, to which three individual fatty acid moieties are attached. The variety of fats in nature and their diversity in terms of physicochemical properties come from the number of combinations of the hundreds of existing fatty acid residues – which, due to their underlying metabolic synthesis pathway, are characterized by an even number of carbon atoms.

In view of their insolubility and the relevance to water-based life, fats often appear stabilized via emulsification in aqueous media; this is notable in the case of milk fat, with globules surrounded by a membrane containing proteins and phospholipids. Said native globules range in size from less than 1 μm to over 10 μm. The uneven size distribution provides larger globules with a tendency to float: under static conditions, that buoyancy effect leads to creaming at the top of the container, but the process may...

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References

  1. Fox PF, McSweeney PLH (1998) Milk lipids. In: Fox PF, McSweeney PLH (eds) Dairy chemistry and biochemistry. Blackie Academic and Professional Publishers, London, pp 67–146Google Scholar
  2. Willis W, Lencki E, Marangoni A (1998) Lipid modification strategies in the production of nutritionally functional fats and oils. Crit Rev Food Sci Nutr 38:639–674CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  1. 1.LEPABE – Laboratory of Engineering of Processes, Environment, Biotechnology and EnergyUniversity of PortoPortoPortugal
  2. 2.DEQ – Department of Chemical Engineering and LEPABE – Laboratory of Engineering of Processes, Environment, Biotechnology and EnergyUniversity of PortoPortoPortugal