Process optimization, growth kinetics, and antioxidant activity of germinated buckwheat and amaranth-based yogurt mimic

Food Chem. 2024 Nov 1:457:140138. doi: 10.1016/j.foodchem.2024.140138. Epub 2024 Jun 16.

Abstract

This study aimed to investigate the integration of cereal and germinated pseudocereals into set-type yogurt mimic, resulting in a novel and nutritious product. Four groups of yogurts mimic, namely CPY-1, CPY-2, CPY-3, and CPY-4, were prepared using different probiotic cultures, including L. acidophilus 21, L. plantarum 14, and L. rhamnosus 296 along with starter cultures. Notably, CPY-2 cultured with L. plantarum and L. rhamnosus and incubated for 12 h exhibited the most desirable attributes. The resulting yogurt demonstrated an acidity of 0.65%, pH of 4.37 and a probiotic count of 6.38 log CFU/mL. The logistic growth model fit revealed maximum growth rates (k, 1/h) and maximum bacterial counts (Nm log CFU/mL) for each CPY variant. The results revealed that CPY-2 significantly improved protein, dietary fiber, phenols and antioxidant capacities compared to the control. Scanning electron microscopy showed more structured and compact casein network in CPY-2, highlighting its superior textural characteristics. Overall, this study demonstrates the incorporation of cereal and germinated pseudocereals into set-type yogurt mimic offers health benefits through increased dietary fiber and β-glucan.

Keywords: Germination; Growth kinetics; Phenols; Probiotic; Pseudocereals; Yogurt.

MeSH terms

  • Amaranthus* / chemistry
  • Amaranthus* / growth & development
  • Amaranthus* / metabolism
  • Antioxidants* / chemistry
  • Antioxidants* / metabolism
  • Fagopyrum* / chemistry
  • Fagopyrum* / growth & development
  • Fagopyrum* / metabolism
  • Fermentation
  • Food Handling
  • Germination*
  • Kinetics
  • Lactobacillus / chemistry
  • Lactobacillus / growth & development
  • Lactobacillus / metabolism
  • Probiotics / analysis
  • Probiotics / chemistry
  • Probiotics / metabolism
  • Yogurt* / analysis
  • Yogurt* / microbiology

Substances

  • Antioxidants