Flaxseed gum-biopolymers interactions driving rheological behaviour of oropharyngeal dysphagia-oriented products

Author(s)

Vieira, J. M. ^{[1, 2]} ; Andrade, C. C. P. ^{[1, 2]} ; Santos, T. P. ^[1] ; Okuro, P. K. ^[1] ; Garcia, S. T. ^[1] ; Rodrigues, I, M. ; Vicente, A. A. ^[2] ; Cunha, R. L. ^[3]

Affiliation

^[1] Univ Campinas UNICAMP, Fac Food Engn, Dept Food Engn, BR-13083862 Campinas, SP - Brazil

^[2] Univ Minho, Ctr Biol Engn CEB, Campus Gualtar, P-4710057 Braga - Portugal

^[3] Rodrigues, M., I, Univ Campinas UNICAMP, Fac Food Engn, Dept Food Engn, BR-13083862 Campinas, SP - Brazil

• Document type: Journal article
• Source: FOOD HYDROCOLLOIDS; v. 111, FEB 2021.
• Web of Science Citations: 7

Abstract

Viscosity-modified diet through thickeners is used as a strategy to circumvent swallowing problems by oropharyngeal dysphagia patients. Most commercial products present xanthan and starch in their formulations, but flaxseed gum (FG) is a potential thickener for liquid food that provides additional health benefits. FG was mixed either with modified starch (MS) and/or xanthan gum (XG), varying biopolymers' concentration according to a central composite rotational design in which rheological and colour properties in water were the evaluated responses. All formulations showed a shear time-independent and shear-thinning behaviour, mainly influenced by XG and MS concentrations. In oscillatory measurements, the formulations presented a prevailing elastic character attributed to MS and mainly to XG, which despite the lower concentration in which it was incorporated, exerted a similar influence on this rheological property. However, the increase of FG concentration was the most significant factor influencing viscosity, but also favoured an increase of both viscoelastic moduli mainly G'. Analysis of the microstructure disclosed different network structures as a result of biopolymers interactions, which was related to rheological behaviour giving insights to design new thickeners for dysphagia management. In addition, the amount of glucose released after in vitro digestion was evaluated and compared to a commercial MS-based thickener. Interestingly, the commercial formulation showed a glucose release significantly higher than the proposed FG/MS/XG-based formulations. These results open the opportunity to tailor the rheological characteristics of food systems by adding and combining natural ingredients, improving technological and nutritional properties. (AU)

• FAPESP's process: 17/18109-0 - Development of an emulsion stability analyzer from microfluidics
• Grantee: Tatiana Porto dos Santos
• Support type: Scholarships in Brazil - Doctorate
• FAPESP's process: 16/05448-8 - Relationship rheology-functionality in thickeners formulations to dysphagia pacients
• Grantee: Rosiane Lopes da Cunha
• Support type: Regular Research Grants
• FAPESP's process: 09/54137-1 - Acquisition of a particle size/distribution analyzer, a zeta potential measurement system, a spray dryer, and an ultra-high-pressure liquid chromatograph/mass spectrometer
• Grantee: Miriam Dupas Hubinger
• Support type: Multi-user Equipment Program
• FAPESP's process: 18/20308-3 - Designing oil structured colloidal systems towards enhanced bioavailability of bioactive compounds on in vitro digestibility behavior
• Grantee: Paula Kiyomi Okuro
• Support type: Scholarships in Brazil - Post-Doctorate
• FAPESP's process: 11/51707-1 - Understanding the emulsion behaviour of fermentation mixtures in the microbial production of diesel and jet-like biofuels
• Grantee: Rosiane Lopes da Cunha
• Support type: Program for Research on Bioenergy (BIOEN) - Regular Program Grants
• FAPESP's process: 06/03263-9 - Process, packaging, edible coatings application and final quality evaluation of some high moisture tropical fruits
• Grantee: Miriam Dupas Hubinger
• Support type: Regular Research Grants