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RISS 인기검색어
- 검색키워드
- 저자 : Rama Rao Vechalapu (검색결과 2 건)
- 무료
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Clarification, Preservation, and Shelf Life Evaluation of Cashew Apple Juice
Uma Talasila,Rama Rao Vechalapu,khasim beebi shaik 한국식품과학회 2012 Food Science and Biotechnology Vol.21 No.3
Cashew apples are tropical fruits rich in sugars,minerals, and vitamin C. In spite of having high nutritional value, neither the fresh cashew apples nor the juice is consumed due to astringency. In the present investigation an attempt was made to reduce the astringency without affecting the nutrient quality of the juice. The clarifying agent, sago at a concentration of 2 g/L, has decreased the tannins by 42.85% but the respective sample’s visual clarity is only 94%. The same clarifying agent with the same concentration along with sterile filtration has decreased the tannins by 41.75% with improved visual clarity of 96%. This clarified juice sample was treated with chemical preservatives and the quality of the juice was assessed periodically up to 4 months. The shelf life of juice treated with citric acid and benzoic acid at 0.1 g/L each and stored at 4oC was prolonged up to 90 days.
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Sarat Babu Imandi,Ramakrishna Chinthala,Silas Saka,Rama Rao Vechalapu,Kiran Kumar Nalla 한국화학공학회 2013 Korean Journal of Chemical Engineering Vol.30 No.5
A cadmium biosorption process was optimized by varying three independent variables pH (4.5-7.5), initial cadmium ion concentration (10-30 mg L−1), and Yarrowia lipolytica dosage (3-5 g L−1) by using a Doehlert experimental design (DD) involving response surface methodology (RSM). For the maximum biosorption of cadmium ion in an aqueous solution by Y. lipolytica, a total of fifteen experimental runs were set and the experimental data fitted to the empirical second-order polynomial model of a suitable degree. The analysis of variance of the quadratic model demonstrates that the model was highly significant. Three-dimensional plots demonstrate relationships between the cadmium ion uptake with the paired variables (when other variable was kept at its optimal level), describing the behavior of biosorption system in a batch process. The model showed that cadmium uptake in aqueous solution was affected by all the three variables studied. The optimum values of the variables were found to be 6.43, 17.56 mg L−1 and 3.63 g L−1 for pH, initial cadmium ion concentration and biomass dosage, respectively, at a contact time of 40 min. At these optimal conditions, the maximum percentage biosorption of cadmium was predicted to be 48.89. The experimental values were in good agreement with predicted values and the correlation coefficient was found to be 0.9985. It showed that both monolayer adsorption and intra-particle diffusion mechanisms were effective in the cadmium biosorption process. Therefore, it is apparent that the DD involving RSM not only gives valuable information on interactions between the variables but also leads to identification of feasible optimum values of the studied variables.
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