The aim of this research was to develop yogurt analogue by blending soy-maize milk and to study its sensory and keeping quality. D-optimal mixture design was employed for the formulation of soy-maize yogurt analogue. Five different formulations containing soymilk and maize milk in the ratio of 100:0, 85:15, 70:30, 55:45 and 40:60 were prepared. Sugar (6 g per 100 g milk base), xanthan gum (0.005 g per 100 g milk base) and culture (2U per 20 l) were mixed in all formulations. The prepared yogurts were subjected to sensory evaluation for consumer acceptability. The sensory analysis revealed that soymilk (85%) and maize milk (15%) was of acceptable quality. There was significant difference (p<0.05) between the formulation in terms of color and appearance, flavor, body and texture and overall acceptance. The soy and soy-maize yogurt (optimized) were evaluated for fermentation kinetics (pH, acidity, total plate count and Streptococcus thermophilus count) at the interval of 2 h for 6 h during incubation; and during storage (refrigeration temperature 4-5℃) at the interval of 3 days for 12 days. The physicochemical analysis showed that there was significant difference (p<0.05) in terms of protein, carbohydrate, acidity and syneresis and not significant (p>0.05) in regards of moisture content, fat, ash, and pH between soy and soy-maize yogurt. Also, there was significant difference (p<0.05) in pH, acidity, total plate count and Streptococcus thermophilus count with respect to incubation and storage time for soy and soy-maize yogurt. The yeast and molds count were observed at the 12th day of storage only. The syneresis of soy and soy-maize yogurt was also significantly different (p<0.05) with respect to storage time.
The aim of present work was to describe the traditional process of preparation, sensory profile and chemical composition of Sargyangma. Sargyangma was prepared in lab and its descriptive sensory test and chemical analysis were performed. The colour of Sargyangma was slightly brown and unevenly distributed. Sargyangma had characteristic aroma and taste mainly due to cooked blood and Yangben. Yangben is local word used by Limbu ethnic community for edible lichen. This had moderately intense bloody aroma and taste. Very intense Yangben aroma and taste was readily detectable. In the overall, Sargyangma had moderately intense pleasant, porky-meaty, spicy aroma. Sargyangma was moderately compact and juicy. Sargyangma contained high amount of fat (29.2%) and moderate amount of protein (13.33%).
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