Optimization of controlled fermentation by Lactobacillus acidophilus (CP_020620.1) in rice bran sourdough and evaluation of quality characteristics of pan bread by using response surface method

Document Type : Research Article

Authors

1 PhD student, Department of Food Biotechnology, Research Institute of Food Science and Technology (RIFST), Mashhad, Iran.

2 Associate professor, Department of Food Biotechnology, Research Institute of Food Science and Technology (RIFST), Mashhad, Iran.

3 Associate professor, Department of Food Science and Technology, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran.

4 PhD student, Department of Food Science and Technology, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran.

Abstract

Optimization of fermentation control with potential application of rice bran sourdough in novel fermentation technologies is increasing every day to come up to suitable alternatives for additives in bakery. In this research after isolating the dominant starter of the traditional rice bran sourdough and its identification using PCR and specific primer, it was used to make a traditional sourdough and evaluating the sourdough pan bread qualities by RSM method, under the impression of fermentation time (8, 16 and 24 h), fermentation temperature (26, 32 and 38 °C) and sugar content (1.5, 3 and 4.5 %). In this research, results of evaluating the proportion fitted models showed that by increasing the temperature and fermentation time in a constant sugar content, the titratable acidity (TTA), microbial population dynamics, specific volume, porosity, the total color difference (TCD) and cohesiveness were significantly increased and decreased respectively. However, there were a trend decreasing in the hardness and over acceptability of bread texture (P0.05). The result of this research a model was defined for any dependent variable. Also for evaluating the accuracy of the fitted models, desirability and lack of fit test were determined.

Graphical Abstract

Optimization of controlled fermentation by Lactobacillus acidophilus (CP_020620.1) in rice bran sourdough and evaluation of quality characteristics of pan bread by using response surface method

Highlights

  • Optimization of controlled fermentation of rice bran sourdough was performed in the presence of L. acidophilus (CP_020620.1).
  • Adequacy of the model in the experimental design RSM with lack of fit test was performed for each response.
  • Hardness and Cohesiveness characteristics texture of pan bread in the presence of rice bran sourdough were improved.
  • Rice bran sourdough were improved specific volume and porosity of pan bread.
  • Rice bran sourdough were improved crust total color difference (TCD) and over acceptability (OAA) of pan bread.

Keywords

Main Subjects

References

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Innovative Food Technologies
Volume 6, Issue 3
May 2019
Pages 379-397

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History

  • Receive Date: 08 December 2018
  • Revise Date: 24 April 2019
  • Accept Date: 15 July 2019

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