Fortification of milk with plant extracts modifies the acidification and reducing capacities of yoghurt bacteria


Alwazeer D., BULUT M., Tunçtürk Y.

INTERNATIONAL JOURNAL OF DAIRY TECHNOLOGY, cilt.73, ss.117-125, 2020 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 73 Konu: 1
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1111/1471-0307.12643
  • Dergi Adı: INTERNATIONAL JOURNAL OF DAIRY TECHNOLOGY
  • Sayfa Sayıları: ss.117-125

Özet

The acidification and reducing capacities of yoghurt bacteria were evaluated in different plant extract-enriched milk samples. The milk samples enriched with thyme and grape seed extracts exhibited the highest values of acidification capacity for Lactobacillus delbrueckii subsp. bulgaricus (LB) (0.0065 pH unit/min) and Streptococcus thermophilus (ST) (0.0068 pH unit/min). The highest values of reducing capacity were observed in thyme (-0.98 mV/min), grape (-1.92 mV/min) and green tea (-0.75 mV/min)-enriched samples for LB, ST and mixed culture of LB + ST, respectively. The fortification of yoghurt with plant extracts modified the acidification and reducing activities of starters, thus changing the fermentation time and quality attributes of the product.