Role of process variables on the formation and in vitro digestion of gellan gels

Autor(es)

Santos, Tatiana Porto ^[1] ; Cunha, Rosiane Lopes ^[1]

Afiliação do(s) autor(es)

^[1] Univ Campinas UNICAMP, Fac Food Engn, Dept Food Engn, R Monteiro Lobato 80, BR-13083862 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Carbohydrate Polymers; v. 192, p. 111-117, JUL 15 2018.
• Citações Web of Science: 5

Resumo

Gellan gels were produced using different approaches forming structures with varied potential applications. Gels were characterized from appearance, mechanical properties, water holding capacity (WHC) and microstructure. In addition, in vitro digestibility of these gels was evaluated to understand the effect of gastrointestinal environment on their structure stability. All gels presented high WHC (> 80% w/w) but gels were stronger with salt or acid addition, which was associated to the reduction of double helices repulsion of the negatively charged carboxyl groups of gellan. Moreover, low gelation rate induced a more controlled gellan helices aggregation, strengthening even more gels structure. Gellan gels presented resistance to digestion conditions but hardness of these gels during digestion mainly depended on the gelation rate. Based on these findings it would be possible to tune gel properties for a specific application as texture modifier or even as a faecal bulk formation assistant and an ``ileal break{''} inducer. (AU)

• Processo FAPESP: 15/21677-4 - Digestibilidade in vitro de géis de gelana: sistemas estático e dinâmico
• Beneficiário: Tatiana Porto dos Santos
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 11/51707-1 - Entendimento do comportamento de emulsões de misturas fermentativas na produção microbiana de biocombustíveis
• Beneficiário: Rosiane Lopes da Cunha
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Regular
• Processo FAPESP: 04/08517-3 - Propriedades reologicas, termodinamicas e de microestrutura de sistemas formados por polissacarideos e proteinas globulares.
• Beneficiário: Rosiane Lopes da Cunha
• Modalidade de apoio: Auxílio à Pesquisa - Regular