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Physico-chemical characterization of protein fraction from stabilized wheat germ

  • Silvina Patricia Meriles
  • Maria Eugenia Steffolani
  • Alberto Edel León
  • Maria Cecilia PenciEmail author
  • Pablo Daniel Ribotta
Article
  • 6 Downloads

Abstract

Wheat germ shows the highest nutritional value of the kernel. It is highly susceptible to rancidity due to high content of unsaturated fat and presence of oxidative and hydrolytic enzymes. In order to improve its shelf life, it is necessary to inactivate these enzymes by a thermal process. In this work the functional properties and some characteristics of the protein fraction of treated wheat germ were evaluated. Sequential extraction of proteins showed loss of protein solubility and formation of aggregates after heating. DSC thermograms showed that wheat germ treated for 20 min at 175 °C reached a protein denaturation degree of ~ 77%. The stabilization process of wheat germ affected significantly some functional properties, such as foaming stability and protein solubility at pH 2 and pH 8. Nevertheless, heating did not affect the water holding, oil holding and foaming capacity of protein isolates.

Keywords

Wheat germ Protein Functional property Thermal processing 

Notes

Acknowledgements

The authors greatly acknowledge Consejo Nacional de Investigación Científicas y Técnicas (CONICET), Universidad Nacional de Córdoba-Argentina (UNC) and Agencia Nacional de Promoción Científica y Tecnológica for financial support.

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Copyright information

© The Korean Society of Food Science and Technology 2019

Authors and Affiliations

  1. 1.Instituto de Ciencia y Tecnología de Alimentos Córdoba (ICYTAC). Universidad Nacional de Córdoba – CONICETCórdobaArgentina
  2. 2.Facultad de Ciencias AgropecuariasUniversidad Nacional de CórdobaCórdobaArgentina
  3. 3.Instituto Superior de Investigación, Desarrollo y Servicios en Alimentos, SECYTUniversidad Nacional de CórdobaCórdobaArgentina
  4. 4.Facultad de Ciencias Exactas Físicas y NaturalesUniversidad Nacional de CórdobaCórdobaArgentina

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