Studying the effect of wheat flour fortification with soy protein isolate on quality characteristics of doughnut during storage time
Doughnut is a special fermented and fried snack. There are a few studies about wheat flour fortification with soy protein isolate to produce doughnut. The present research was done to study the effect on quality features of doughnut during preservation. Partial substitution of wheat flour with soy...
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Research Institute of Food Science and Technology
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doaj-b36f3f0c813041f98435bbc8537212872020-11-25T02:34:37ZfasResearch Institute of Food Science and Technology Pizhūhish va Nuāvarī dar ̒Ulūm va Sanāyi̒-i Ghaz̠āyī2252-09372538-23572015-01-013430731610.22101/jrifst.2015.01.21.34268029Studying the effect of wheat flour fortification with soy protein isolate on quality characteristics of doughnut during storage timeArash Ghaitaranpour0Mohammad Elahi1Masoud Najaf Najafi2Mohebbat Mohebbi3MSc. Student, Department of Food Science and Technology, Agricultural College, Ferdowsi University of Mashhad, Mashhad, IranAssistant Professor, Department of Food science and Technology, Agricultural College, Ferdowsi University of Mashhad, Mashhad, IranAssistant Professor Department of Food Science & Technology, Institute of Scientific Applied Higher Education Jihad-e-Agriculture, Mashhad, IranAssociate Professor, Department of Food Science and Technology, Agricultural College, Ferdowsi University of Mashhad, Mashhad, IranDoughnut is a special fermented and fried snack. There are a few studies about wheat flour fortification with soy protein isolate to produce doughnut. The present research was done to study the effect on quality features of doughnut during preservation. Partial substitution of wheat flour with soy protein isolate at the levels of 0, 1, 2 and 5 g/100 g was carried out to determine its influence on quality characteristics of doughnuts. The water absorption and protein content of the samples were measured by Farinograph and kjeldahl method respectively. Quality characteristics of doughnut such as porosity and color were determined with Image J software. Sensory evaluation of doughnuts was carried out on 9-point hedonic scale by a panel of 12 judges.The protein content and water absorption of the fortified samples were higher, but their Volume, porosity and lightness were lower than the control. Control sample had the highest overall acceptability rating although the difference between samples were not significant (<em>P</em>>0.05). So it is possible to produce a doughnut fortified with 1-5% soy protein isolate with higher protein content without having significant negative effect on its acceptability.http://journals.rifst.ac.ir/article_68029_483544b3b5755a49cd9bd4bb537129e6.pdfdoughnutfortificationsoy protein isolatestorage time |
collection |
DOAJ |
language |
fas |
format |
Article |
sources |
DOAJ |
author |
Arash Ghaitaranpour Mohammad Elahi Masoud Najaf Najafi Mohebbat Mohebbi |
spellingShingle |
Arash Ghaitaranpour Mohammad Elahi Masoud Najaf Najafi Mohebbat Mohebbi Studying the effect of wheat flour fortification with soy protein isolate on quality characteristics of doughnut during storage time Pizhūhish va Nuāvarī dar ̒Ulūm va Sanāyi̒-i Ghaz̠āyī doughnut fortification soy protein isolate storage time |
author_facet |
Arash Ghaitaranpour Mohammad Elahi Masoud Najaf Najafi Mohebbat Mohebbi |
author_sort |
Arash Ghaitaranpour |
title |
Studying the effect of wheat flour fortification with soy protein isolate on quality characteristics of doughnut during storage time |
title_short |
Studying the effect of wheat flour fortification with soy protein isolate on quality characteristics of doughnut during storage time |
title_full |
Studying the effect of wheat flour fortification with soy protein isolate on quality characteristics of doughnut during storage time |
title_fullStr |
Studying the effect of wheat flour fortification with soy protein isolate on quality characteristics of doughnut during storage time |
title_full_unstemmed |
Studying the effect of wheat flour fortification with soy protein isolate on quality characteristics of doughnut during storage time |
title_sort |
studying the effect of wheat flour fortification with soy protein isolate on quality characteristics of doughnut during storage time |
publisher |
Research Institute of Food Science and Technology |
series |
Pizhūhish va Nuāvarī dar ̒Ulūm va Sanāyi̒-i Ghaz̠āyī |
issn |
2252-0937 2538-2357 |
publishDate |
2015-01-01 |
description |
Doughnut is a special fermented and fried snack. There are a few studies about wheat flour fortification with soy protein isolate to produce doughnut. The present research was done to study the effect on quality features of doughnut during preservation. Partial substitution of wheat flour with soy protein isolate at the levels of 0, 1, 2 and 5 g/100 g was carried out to determine its influence on quality characteristics of doughnuts. The water absorption and protein content of the samples were measured by Farinograph and kjeldahl method respectively. Quality characteristics of doughnut such as porosity and color were determined with Image J software. Sensory evaluation of doughnuts was carried out on 9-point hedonic scale by a panel of 12 judges.The protein content and water absorption of the fortified samples were higher, but their Volume, porosity and lightness were lower than the control. Control sample had the highest overall acceptability rating although the difference between samples were not significant (<em>P</em>>0.05). So it is possible to produce a doughnut fortified with 1-5% soy protein isolate with higher protein content without having significant negative effect on its acceptability. |
topic |
doughnut fortification soy protein isolate storage time |
url |
http://journals.rifst.ac.ir/article_68029_483544b3b5755a49cd9bd4bb537129e6.pdf |
work_keys_str_mv |
AT arashghaitaranpour studyingtheeffectofwheatflourfortificationwithsoyproteinisolateonqualitycharacteristicsofdoughnutduringstoragetime AT mohammadelahi studyingtheeffectofwheatflourfortificationwithsoyproteinisolateonqualitycharacteristicsofdoughnutduringstoragetime AT masoudnajafnajafi studyingtheeffectofwheatflourfortificationwithsoyproteinisolateonqualitycharacteristicsofdoughnutduringstoragetime AT mohebbatmohebbi studyingtheeffectofwheatflourfortificationwithsoyproteinisolateonqualitycharacteristicsofdoughnutduringstoragetime |
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