Peer Reviewed Journal Articles (Inter.) (Engg)
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Browsing Peer Reviewed Journal Articles (Inter.) (Engg) by Author "Mohapatra, D."
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- ItemEffect of microwave blanching and brine solution pretreatment on the quality of carrots dried in solar-biomass hybrid dryer(2018) Delfiya, D.S.A.; Mohapatra, D.; Kotwaliwale, N.; Mishra, A.K.The effect of microwave blanching time (0–3 min), followed by dipping in brine solution (sample to solution ratio 0–4) prior to drying of carrot slices and shreds in solar-biomass hybrid dryer on the final moisture content of the samples, drying rate, rehydration ratio, color change, textural firmness change, and beta carotene content was studied using two-factor 3 level factorial design. Pretreatment parameters were optimized using response surface methodology. As the microwave blanching time increased, there was an increase in the drying rate, rehydration ratio, and beta carotene content, with minimum changes in textural firmness, color, and final moisture content. Increase in brine solution to sample ratio impacted the drying rate and beta-carotene content in the samples, positively. Microwave blanching time of 3 min and brine solution to sample ratio of 2 were found to be the optimum pretreatment parameters for drying of carrot slices and shreds.
- ItemOptimization of rice bran oil encapsulation using jackfruit seed starch – whey protein isolate blend as wall material and its characterization(2017) Murali, S.; Kar, A.; Patel, A.S.; Mohapatra, D.; Krishnakumar, P.Response surface methodology (RSM) was used to optimize rice bran oil encapsulation using jackfruit seed starch – whey protein isolate blend as wall material by spray drying technique. Oil concentration (20, 25 and 30 %), wall material (Jackfruit seed starch & whey protein isolate) starch-protein ratio (1:1, 3:1 and 5:1) and spray drying inlet air temperature (140, 150 and 160 °C) were considered as process variables for optimization. A three-factor, three-level Box-Behnken design of RSM was used to conduct the experiments with the aim of maximizing encapsulation efficiency and minimizing peroxide value in the encapsulated powder. A polynomial regression model was fitted using design expert software, and the optimum conditions obtained were 20 % oil concentration, 3:1 starch-protein ratio and 140 °C spray drying inlet air temperature. The encapsulated rice bran oil powers obtained at optimized conditions offered 85.90 % of encapsulation efficiency and 1.18 meq/kg oil of peroxide value. The characterization study revealed that powder particles size (diameter) varied from 3.40 to 300.51 μm and most of the particles were smooth spheres with little appendages.