Physical properties of stirred yoghurt
1. Sensory evaluation
Ten trained panellists from the staff members of the Dairy Science Department, National Research Centre, Egypt used a quality rating score card for the evaluation of flavor (50 points) body and texture (40 points) and appearance (10 points).
2. Viscosity
Viscosity of different stirred yoghurt fortified with PPE was measured using Brookfield Viscometer (Brookfield Engineering Laboratories, USA), equipped with SC4-21 spindle running at 20, 30, 50, 60 and 100. Measurements were taken at room temperature.