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Optimization of the Ohmic Heating Parameters for Pasteurization of Mango Pulp using Response Surface Methodology

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Title Optimization of the Ohmic Heating Parameters for Pasteurization of Mango Pulp using Response Surface Methodology
 
Creator Priyadarshini, Aparajita
Rayaguru, Kalpana
Bal, Lalit M
Jena, Diptimayee
Lenka, Chandrashree
Pradhan, Sukanya
 
Subject Ascorbic acid
Overall acceptability
Pulp concentration
Pulp temperature
Voltage gradient
 
Description 1087-1097
The present investigation optimized the ohmic heating variables influencing the quality parameters of mango pulp during
pasteurization. Three independent variables such as voltage gradients (10–20 V/cm) of ohmic heating, pulp temperature
(60–80℃) and pulp concentration (6–14 °Brix) were experimented using Box-Behnken experimental design of response
surface methodology. The models generated for the quality parameters as responses such as ascorbic acid, total phenol content,
overall acceptability, mold load and bacterial load were tested for their validity using ANOVA. The optimum conditions for
pasteurization of mango pulp through ohmic heating were found to be 19.5 V/cm, 75°C and 9.96 °Brix respectively for voltage
gradient, pulp temperature and pulp concentration. The values of corresponding quality parameters of ascorbic acid content,
total phenolics content, overall acceptability, yeast/mold load and bacterial load were estimated to be 129.39 mg/100g dm,
288.006 mg GAE/100 g dm, 7.40, 11.01 cfu/ml and 162.299 cfu/ml respectively. The results were experimentally verified
within a deviation of ±0.5%. Structural variations and functional compounds of fresh, conventionally heated and ohmic heated
samples at optimum conditions were analyzed through SEM and FTIR respectively. The ohmic heated sample was found
superior over conventionally heated sample with maximum retention of quality parameters. Further, the rheological analysis
depicted the closeness of ohmic heated (optimum) sample with the fresh sample.
 
Date 2022-10-28T09:21:23Z
2022-10-28T09:21:23Z
2022-10
 
Type Article
 
Identifier 0022-4456 (Print); 0975-1084 (Online)
http://nopr.niscpr.res.in/handle/123456789/60742
https://doi.org/10.56042/jsir.v81i10.63306
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source JSIR Vol.81(10) [Oct 2022]