Bitterness in sodium caseinate hydrolysates: role of enzyme preparation and degree of hydrolysis

Dara O'Sullivan, Alice B. Nongonierma, Richard J. FitzGerald

Research output: Contribution to journalArticlepeer-review

Abstract

BACKGROUND: Enzymatic hydrolysis of sodium caseinate (NaCas) may lead to the development of bitterness. Careful selection of hydrolysis conditions (i.e. enzyme preparation and duration) yielding different degrees of hydrolysis (DH) may aid in the development of low bitterness. RESULTS: Eighteen NaCas hydrolysates were generated with four enzyme preparations (Alcalase 2.4L, Prolyve 1000, FlavorPro Whey and pepsin) to different DH values. Hydrolysate bitterness score, assessed using a trained panel (ten assessors), generally increased at higher DH values for Alcalase, Prolyve and pepsin hydrolysates. However, all FlavorPro Whey hydrolysates (DH 0.38–10.62%) displayed low bitterness score values (<26.0%) comparable to that of intact NaCas (13.8 ± 2.0%, P > 0.05). CONCLUSION: Enzyme preparation and DH affect the bitterness of NaCas hydrolysates. The results are relevant for the generation of NaCas hydrolysates with reduced bitterness.

Original languageEnglish
Pages (from-to)4652-4655
Number of pages4
JournalJournal of the Science of Food and Agriculture
Volume97
Issue number13
DOIs
Publication statusPublished - Oct 2017

Keywords

  • bitterness
  • casein hydrolysates
  • enzymatic hydrolysis
  • FlavorPro Whey

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