Influence of ohmic heating on electrical properties of tomato puree

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dc.contributor.advisorParamjit Singh
dc.contributor.authorKiranjot Kaur
dc.date.accessioned2019-11-12T04:45:58Z
dc.date.available2019-11-12T04:45:58Z
dc.date.issued2019
dc.description.abstractOhmic heating is a green processing technique that is different from other processing methods. In this process electric current is allowed to pass through the food sample and heating occurs due to inherent resistance of sample. It is highly efficient technology and provides rapid and uniform heating. In this study, ohmic heating treatment was applied to different concentrations (100, 90, 80, 70 and 60%) of tomato puree. The puree was ohmically heated from 30 to 70⁰C at four different voltage gradients of 8, 6, 4 and 2V/cm for different concentrations. Measurements have been made on electrical conductivity, ohmic heating rate, density, pH, TSS and specific heat. The voltage gradient and concentration has significant effect on electrical conductivity of tomato puree. Electrical conductivity and ohmic heating increases linearly with rise in temperature, concentration and voltage gradient. pH and TSS are also noted before and after the ohmic heating treatment. Statistical analysis has been conducted and observed that this treatment has no significant effect on pH and TSS values. System performance coefficient was also calculated for ohmic heater at different voltage gradients and observed that as the concentration of tomato puree decreases the efficiency of ohmic heating apparatus shift towards higher voltage gradient in prescribed voltage range.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810135072
dc.keywordsohmic heating, tomato puree, electrical conductivity, specific heat, pH, TSS, system performance coefficienten_US
dc.language.isoenen_US
dc.pages54en_US
dc.publisherPunjab Agricultural University, Ludhianaen_US
dc.research.problemInfluence of ohmic heating on electrical properties of tomato pureeen_US
dc.subMathematicsen_US
dc.subjectnullen_US
dc.themeInfluence of ohmic heating on electrical properties of tomato pureeen_US
dc.these.typeM.Scen_US
dc.titleInfluence of ohmic heating on electrical properties of tomato pureeen_US
dc.typeThesisen_US
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