Effect of Storage on Physio-Chemical Properties of Peanut Yogurt

Abstract

Peanuts may be consumed in a variety of processed forms like roasted, raw and processed etc. andrepresent as a multimillion dollar crop worldwide with many potential dietary benefits as it contains highprotein and health effective oils. Objective: The present investigation was planned to evaluate thephysio-chemical properties of peanut milk yogurt by the addition of different concentration of peanut milk(0 %, 10 %, 20 % and 30 %), skimmed milk liquid (60 %, 70 %, 80 %, and 90 %), skimmed milk powder (9 %)and sugar (1 %). Methods: The physio-chemical tests (pH, acidity, moisture, ash, fat, protein, syneresis,and viscosity) were examined after every 5 days of interval for a period of 15 days at 4 ºC. Results: Theresults of physio-chemical analysis revealed that pH, ash, fat, protein and viscosity decrease duringstorage period where as acidity, moisture and rate of syneresis increased during storage. Treatment T1(10 % peanut milk) was comparatively best for manufacturing of peanut milk yogurt followed by T2 (20 %peanut milk + 70 % skimmed milk liquid + 9 % skimmed milk powder + 1 % sugar) while peanut milk yogurtfrom (30 % peanut milk + 60 % skimmed milk liquid + 9 % skimmed milk powder + 1 % sugar) had the lowestdegree of firmness. Conclusions: It was noticed that correlation among fat, total solids and proteincontents in peanut milk affect the extent of serum separation and pH of yogurt. The storage hadsignificant effects on all physio-chemical parameters. Treatments had significant effect on all physiochemicalparameters.