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Gupta, Kalika; Alam, Mohammed Shafiq. |
A five level four factors central composite rotatable design under response surface methodology was used to optimize process conditions of the foam mat drying process i.e. egg albumen (0-12%), methyl cellulose (0.1-0.5%), drying bed thickness (3-7mm) and drying temperature (55-750C) to develop grape bar with final moisture content of 14±1 % (db). Contour and response graphs were generated and the effect of foaming parameters on the quality parameters namely drying time, color change, texture, non-enzymatic browning, total sugars (%), titrable acidity (%), protein (%) and overall acceptability (%) were studied. Significant regression models were established with the coefficient of determination, R2 (≥0.90). Optimization of process for grape bar was... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Post Harvest technology : Foam mat drying; Grape bar; Quality Parameters. |
Ano: 2014 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2879 |
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Alam, Mohammed Shafiq; Gupta, kalika. |
Abstract: Studies on modeling of thin layer drying kinetics of grape juice concentrate were conducted using pilot scale convective dryer. Experiments were conducted in temperature range of 55-750C and drying bed thickness of 3-7 mm, to attain desired moisture content (14±1% db). Different thin layer drying models like newton, page, logarithmic, two term, two term exponential and midilli models were fitted to the experimental data of convective dehydration and their adequacy of fit was investigated. All the samples witnessed falling rate period drying irrespective of the selected temperature and thickness. The effective moisture diffusivity and activation energy were found in range of 7.18-2.56 m2/sec and 26.07-21.59 kJ/mole respectively for 3-7 mm... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Convective drying; Drying kinetics; Drying models; Grapes; Quality parameters. |
Ano: 2014 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2822 |
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