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Foods 2015, 4(2), 229-239; doi:10.3390/foods4020229

The Combined Effect of High Hydrostatic Pressure and Calcium Salts on the Stability, Solubility and Gel Formation of β-Lactoglobulin

1
Chair for Food Process Engineering and Dairy Technology, Technische Universität München, 85354 Freising-Weihenstephan, Germany
2
Research Centre for Nutrition and Food Science (ZIEL)–Section Technology, Technische Universität München, 85354 Freising-Weihenstephan, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Carl Joseph Schaschke
Received: 30 March 2015 / Revised: 19 May 2015 / Accepted: 1 June 2015 / Published: 8 June 2015
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Abstract

Stability, aggregation and gelation of β-Lactoglobulin are affected by high pressure and salts of the Hofmeister series. Little is known about their combined effects on structure formation processes of β-Lactoglobulin, mainly because many salts of the series are not suitable for use in food. Here, we investigate the effect of calcium salts on the strength of pressure-induced gels, inspired by the fact that high pressure and salts change the water structure in a similar way. We find that the larger the applied pressures, the higher the strength of the gels. In addition to pressure, there is a significant influence by the type of anions and the amount of added calcium salts. Gel strength increases in the order CaCl2 < Ca (NO3)2 < CaI2. This trend correlates with the position of the salts in the Hofmeister series. The results are explained by analogy with the thermal aggregate formation by taking reaction rates for unfolding and aggregation, as well as specific/non-specific salts effect into consideration. View Full-Text
Keywords: high hydrostatic pressure; β-Lactoglobulin; Hofmeister series; gel formation high hydrostatic pressure; β-Lactoglobulin; Hofmeister series; gel formation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Saalfeld, D.; Riegel, I.; Kulozik, U.; Gebhardt, R. The Combined Effect of High Hydrostatic Pressure and Calcium Salts on the Stability, Solubility and Gel Formation of β-Lactoglobulin. Foods 2015, 4, 229-239.

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