Rheological properties of three Smooth homogenized spreads were evaluated at different shear rates (2.29 – 34.35 s-1) using Brookfield rotational viscometer (DVIII Ultra). The spreads were prepared from purees of three fresh fruits, (Guava, Banana and Strawberry). To 100 g of puree; 1 g citric acid, 2 g sugar, 10 g water and 1g of a thickening agent were added and the mixture was homogenized. Xanthan, guar and carboxy methyl cellulose (CMC) gums were used for making three guava spreads, whereas xanthan only was used for making banana and strawberry spreads. Different rheological models were fitted to the data. The effect of temperature on rheological properties of guava, banana and strawberry spreads was studied. All fruit spreads, exhibited non-Newtonian pseudoplastic behavior. Herschel-bulkley (HB) model was the best fit (i.e. highest R2) for data of guava and strawberry spreads followed by Casson and Power law models. Bingham model showed higher values for yield stress of all spreads than those of HB model, whereas those of Cassons’ were the least. Guava spread containing xanthan was more viscous than those containing guar or CMC. In general, spread viscosity decreased as temperature was increased. Heat penetration tests conducted on xanthan-containing spreads packed into flexible PA/PE pouches suggested possible use of such pouches for packaging fruit spreads. Xanthan-containing spreads when subjected to sensory evaluation gained satisfactory scores or butter which indicated panelists’ appreciation for the new products.
| Published in |
International Journal of Nutrition and Food Sciences (Volume 5, Issue 1-1)
This article belongs to the Special Issue Food Engineering and Packaging |
| DOI | 10.11648/j.ijnfs.s.2016050101.13 |
| Page(s) | 14-22 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2015. Published by Science Publishing Group |
Fruit Spread, Rheological Models, Viscosity, Heat Penetration, Sensory
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APA Style
Manal A. Sorour, Samir M. H. Rabie, Asrar Y. I. Mohamed. (2015). Rheological Properties of Some Fruit Spreads. International Journal of Nutrition and Food Sciences, 5(1-1), 14-22. https://doi.org/10.11648/j.ijnfs.s.2016050101.13
ACS Style
Manal A. Sorour; Samir M. H. Rabie; Asrar Y. I. Mohamed. Rheological Properties of Some Fruit Spreads. Int. J. Nutr. Food Sci. 2015, 5(1-1), 14-22. doi: 10.11648/j.ijnfs.s.2016050101.13
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Download@article{10.11648/j.ijnfs.s.2016050101.13,
author = {Manal A. Sorour and Samir M. H. Rabie and Asrar Y. I. Mohamed},
title = {Rheological Properties of Some Fruit Spreads},
journal = {International Journal of Nutrition and Food Sciences},
volume = {5},
number = {1-1},
pages = {14-22},
doi = {10.11648/j.ijnfs.s.2016050101.13},
url = {https://doi.org/10.11648/j.ijnfs.s.2016050101.13},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijnfs.s.2016050101.13},
abstract = {Rheological properties of three Smooth homogenized spreads were evaluated at different shear rates (2.29 – 34.35 s-1) using Brookfield rotational viscometer (DVIII Ultra). The spreads were prepared from purees of three fresh fruits, (Guava, Banana and Strawberry). To 100 g of puree; 1 g citric acid, 2 g sugar, 10 g water and 1g of a thickening agent were added and the mixture was homogenized. Xanthan, guar and carboxy methyl cellulose (CMC) gums were used for making three guava spreads, whereas xanthan only was used for making banana and strawberry spreads. Different rheological models were fitted to the data. The effect of temperature on rheological properties of guava, banana and strawberry spreads was studied. All fruit spreads, exhibited non-Newtonian pseudoplastic behavior. Herschel-bulkley (HB) model was the best fit (i.e. highest R2) for data of guava and strawberry spreads followed by Casson and Power law models. Bingham model showed higher values for yield stress of all spreads than those of HB model, whereas those of Cassons’ were the least. Guava spread containing xanthan was more viscous than those containing guar or CMC. In general, spread viscosity decreased as temperature was increased. Heat penetration tests conducted on xanthan-containing spreads packed into flexible PA/PE pouches suggested possible use of such pouches for packaging fruit spreads. Xanthan-containing spreads when subjected to sensory evaluation gained satisfactory scores or butter which indicated panelists’ appreciation for the new products.},
year = {2015}
}
TY - JOUR T1 - Rheological Properties of Some Fruit Spreads AU - Manal A. Sorour AU - Samir M. H. Rabie AU - Asrar Y. I. Mohamed Y1 - 2015/11/10 PY - 2015 N1 - https://doi.org/10.11648/j.ijnfs.s.2016050101.13 DO - 10.11648/j.ijnfs.s.2016050101.13 T2 - International Journal of Nutrition and Food Sciences JF - International Journal of Nutrition and Food Sciences JO - International Journal of Nutrition and Food Sciences SP - 14 EP - 22 PB - Science Publishing Group SN - 2327-2716 UR - https://doi.org/10.11648/j.ijnfs.s.2016050101.13 AB - Rheological properties of three Smooth homogenized spreads were evaluated at different shear rates (2.29 – 34.35 s-1) using Brookfield rotational viscometer (DVIII Ultra). The spreads were prepared from purees of three fresh fruits, (Guava, Banana and Strawberry). To 100 g of puree; 1 g citric acid, 2 g sugar, 10 g water and 1g of a thickening agent were added and the mixture was homogenized. Xanthan, guar and carboxy methyl cellulose (CMC) gums were used for making three guava spreads, whereas xanthan only was used for making banana and strawberry spreads. Different rheological models were fitted to the data. The effect of temperature on rheological properties of guava, banana and strawberry spreads was studied. All fruit spreads, exhibited non-Newtonian pseudoplastic behavior. Herschel-bulkley (HB) model was the best fit (i.e. highest R2) for data of guava and strawberry spreads followed by Casson and Power law models. Bingham model showed higher values for yield stress of all spreads than those of HB model, whereas those of Cassons’ were the least. Guava spread containing xanthan was more viscous than those containing guar or CMC. In general, spread viscosity decreased as temperature was increased. Heat penetration tests conducted on xanthan-containing spreads packed into flexible PA/PE pouches suggested possible use of such pouches for packaging fruit spreads. Xanthan-containing spreads when subjected to sensory evaluation gained satisfactory scores or butter which indicated panelists’ appreciation for the new products. VL - 5 IS - 1-1 ER -
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