Interfacial properties of poppy seed protein (Papaver somniferum L.) as an alternative protein source at oil/water interface: influence of pH on stability, morphology and rheology

Turker D., Sarac M. G., Yetiman A. E., Doğan M.

EUROPEAN FOOD RESEARCH AND TECHNOLOGY, vol.247, no.10, pp.2545-2556, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 247 Issue: 10
  • Publication Date: 2021
  • Doi Number: 10.1007/s00217-021-03806-x
  • Journal Name: EUROPEAN FOOD RESEARCH AND TECHNOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, ABI/INFORM, Agricultural & Environmental Science Database, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, Biotechnology Research Abstracts, CAB Abstracts, Chemical Abstracts Core, Compendex, Food Science & Technology Abstracts, Hospitality & Tourism Complete, Hospitality & Tourism Index, Veterinary Science Database
  • Page Numbers: pp.2545-2556
  • Keywords: Interfacial rheology, Emulsion, Poppy seed protein, Oil, water interface
  • Erciyes University Affiliated: Yes

Abstract

This study was systematically investigated the bulk and interfacial rheological properties of the poppy seed proteins as new source of plant proteins for healthier diets. Results revealed that low molecular weight of proteins (> 15 kDa) might contribute to the emulsion stability. The droplet size increased inversely with protein band density in the 10-15 kDa range. The pH value of the most stable emulsion was pH 3.0. An increasing trend of emulsion activity was observed for decreasing pH values which perhaps could be attributed to an opening of protein conformational structures. The optical microscopy results showed that the decrease in pH resulted in a better storage stability as promoting the formation of a more uniform distribution and smaller oil droplets. We conclude that present study puts forth a major contribution to plant protein research by demonstrating its ability to make stable emulsion as a function of pH at the O/W interface.