Thermal, structural and functional properties of rice bran defatted with alcoholic solvents

Author(s)

Capellini, Maria C. ^[1] ; Novais, Juliana S. ^[1] ; Monteiro, Rafaella F. ^[1] ; Veiga, Bruno Q. ^[1] ; Osiro, Denise ^[2] ; Rodrigues, Christianne E. C. ^[1]

Affiliation

^[1] Univ Sao Paulo, Lab Engn Separacoes LES, Dept Engn Alimentos ZEA, Fac Zootecnia & Engn Alimentos FZEA, BR-13635900 Pirassununga, SP - Brazil

^[2] Ctr Univ Fundacao Educ Guaxupe UNIFEG, BR-37800000 Guaxupe, MG - Brazil

• Document type: Journal article
• Source: JOURNAL OF CEREAL SCIENCE; v. 95, SEP 2020.
• Web of Science Citations: 4

Abstract

Samples from combinations of different alcoholic extraction process parameters of rice bran oil, solvents (ethanol or isopropanol) and temperatures (60 or 80 degrees C) were evaluated and compared with samples from industrial processing regarding the physicochemical, structural and functional characteristics of the defatted meal since these properties are directly associated with the quality of the products. The results obtained for solids from alcoholic extraction did not differ significantly from those obtained from industrial processing using hexane. Although the use of alcohols and high temperatures led to reductions in the nitrogen solubility (21% to 13.5-16.7%), emulsifying activity (31% to 14-25%) and thermal stability, possibly as a function of protein structural modifications due to denaturation, stable foams were produced (26-50%), and adequate values for the water and oil absorption capacities were determined (4 and 3 g/g sample), allowing the application of this material in baking and meat products. (AU)

• FAPESP's process: 13/13339-6 - Technical feasibility of using alcoholic solvents in vegetable oil extraction: Physical-chemical characterization of oil, functional properties of protein fraction and solvent recovery
• Grantee: Maria Carolina Capellini
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 14/21252-0 - Equilibrium and production processes of biofuels and bioproducts
• Grantee: Antonio José de Almeida Meirelles
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 14/09446-4 - Development of a process of vegetable oil extraction using alcoholic solvents: evaluation of oil composition and changes in the protein fraction
• Grantee: Christianne Elisabete da Costa Rodrigues
• Support Opportunities: Regular Research Grants
• FAPESP's process: 18/12713-5 - Effects of soybean pre-treatment on the performance of the alcoholic extraction process: yield, functionalities of the protein fraction and volatile fraction characterization
• Grantee: Maria Carolina Capellini
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 17/20840-4 - Valorization of agroindustrial coproducts through obtaining vegetable oils and minority compounds by extraction with solvents
• Grantee: Christianne Elisabete da Costa Rodrigues
• Support Opportunities: Regular Research Grants