RESEARCH PAPER
Design of gluten-free instant whole acorn-maize blended flour by extrusion process
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1
Iranian Research Organization for Science and Technology (IROST), Sh. Ehsani Rad St., Enqelab St., Ahmadabad Mostoufi Rd., Azadegan Highway, P. O. Box 33535-111, Tehran 3313193685, Iran
 
2
Iranian Academic Center for Education, Culture and Research (ACECR) … Khorasan Razavi Province-Iran, Ferdowsi University of Mashhad, Azadi square, Mas, 9177513760, Mashhad, Iran
 
 
Final revision date: 2024-07-24
 
 
Acceptance date: 2024-08-05
 
 
Publication date: 2024-09-26
 
 
Corresponding author
Elnaz Milani   

Food processing, Iranian Academic Center for Education Culture and Research (ACECR), Mashhad, Iran, Ferdowsi university of mashhad . Azadi square, Mas, 9177513760, Mashhad, Iran
 
 
Int. Agrophys. 2024, 38(4): 393-405
 
HIGHLIGHTS
  • Fabricating the blended meal were determined based on CCD analysis
  • Preparation of instant products through extrusion processing
  • Flow behavior of instant blended flour were determined
KEYWORDS
TOPICS
ABSTRACT
Gluten-free products have become popular due to the increasing number of people with gluten-related disorders. In this study, the effect of whole acorn flour and whole maize flour levels of 25, 62.5, and 100% and extrusion process variables, including screw speed 120, 160, and 200 rpm and feed moisture content of 12, 15, and 18%, on the production of gluten-free products were investigated. The results demonstrated that increasing the whole acorn flour had a positive effect on water absorption index, angle of repose, carr index, and Haussner ratio, but negatively impacted expansion index and water solubility index. Increasing feed moisture had a notable impact on increasing bulk density and hardness and bowl life hardness while decreasing water solubility index. The optimal conditions for the fabrication of the blended meal were whole acorn flour 63.81%, 120 rpm screw speed, and 18% feed moisture content. The samples produced in these conditions had an 18.23 expansion index, 6.34 humidity, 4.93 g g-1 water absorption index, 0.16 g g-1 water solubility index, 5.70 N hardness, 2.85 N bowl-life, L* 60.29, 26.14 angle of repose, 1.15 Haussner ratio, and 14.31 carr index. Our findings suggest an innovative approach for applying whole acorn flour to prepare nutritious gluten-free instant products by extrusion processing.
FUNDING
This work was supported by funds from the Iranian Academic Center for Education Culture and Research (ACECR) (Number of grant 2160, 2021-2023).
CONFLICT OF INTEREST
The Authors do not declare any conflict of interest.
 
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