Texture analysis of frozen yogurt
Texture(as hardness) of the frozen yogurt fortified with nano-emulsion containing purple rice bran oil ,Frozen yogurt containing emulsion material without purple rice bran oil and Plain frozen yogurt was determined according to Soukoulis nad Tzia (2008). For determination of hardness, samples were packaged in cups with 65 mm diameter and 30 mm height. Samples were then transferred from -22c to -15c and held for 24 h before analysis. A texture analyzer (Instron 5544,Conton,MA,USA) coupled with a 500 N static load cell was used. Measurements were carried out using a 6 mm stainless steel cylindrical probe. The pentration depthatthe geometrical center of the samples was 10 mm and the penetration speed was set at 2 mm s. Hardness (N) of the samples was determined as the peak compression force during penetration.