Effect of limited hydrolysis on the interfacial rheology and foaming properties of β-lactoglobulin A
| Autor: | Lene Gram Hansen, Jeanette Otte, Karsten B. Qvist, Richard Ipsen, Anni Nielsen, Ranjan Sharma |
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| Rok vydání: | 2001 |
| Předmět: |
Chromatography
biology Chemistry Genetic variants Surfaces and Interfaces General Medicine biology.organism_classification Viscoelasticity Hydrolysis Colloid and Surface Chemistry Rheology Chemical engineering Enzymatic hydrolysis Aspartic acid Bacillus licheniformis Physical and Theoretical Chemistry Elasticity (economics) Biotechnology |
| Zdroj: | Colloids and Surfaces B: Biointerfaces. 21:173-178 |
| ISSN: | 0927-7765 |
| Popis: | Hydrolysis of beta-lactoglobulin (beta-Lg), genetic variant A, using a serine protease specific for glutamic and aspartic acid residues from Bacillus licheniformis (BLP), resulted in improved foam overrun and foam stability. Limited hydrolysis (19-26% hydrolysed beta-Lg) led to a more rapid increase in the viscoelastic properties of air/water interfacial films and a concomitant increase in foam overrun compared with intact beta-Lg, presumably due to increased exposure of hydrophobic areas. The increased exposure did not, however, cause formation of an interfacial layer with increased viscoelastic properties. More extended hydrolysis (86% hydrolysed beta-Lg) resulted in a higher initial overrun than the unhydrolysed sample and the best foam stability. The interfacial elasticity and viscosity, though, was the lowest observed. Thus, high maximum values of these interfacial properties are not necessary prerequisites for formation of a voluminous and stable foam. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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