Chemical and structural characterization of Pholiota nameko extracts with biological properties

卷:216

Rodrigues, Dina ; Freitas, Ana C. ; Sousa, Sergio ; Amorim, Manuela ; Vasconcelos, Marta W. ; da Costa, Joao P. ; Silva, Artur M. S. ; Rocha-Santos, Teresa A. P. ; Duarte, Armando C. ; Gomes, Ana M. P.

Univ Aveiro

关键词: Pholiota nameko;    Enzymatic- and ultrasound-assisted extraction;    Chemical characterization;    Structural characterization;    Prebiotic activity;    Antidiabetic activity;   

DOI  :  10.1016/j.foodchem.2016.08.030

学科分类：食品科学和技术

【 摘 要 】

Edible mushrooms including Pholiota nameko are excellent sources of extractable bioactive compounds with much to explore. Enzymatic extractions with Cellulase and Viscozyme were responsible for highest extraction yields (67-77%). No strong antioxidant activity was observed although extracts were able to scavenge ARTS' and OH center dot+. Potential prebiotic activity was observed in all extracts, some increasing 1.4-2 Log cycles of Lactobacillus acidophilus La-5 and Bifidobacterium animalis BB12. 30-50% alpha-glucosidase inhibition was observed in ultrasound, Flavourzyme and Cellulase extracts. Flavourzyme and Cellulase extracts are richer in macro (Mg, K and P) and micro elements (Zn, Mn and Fe) in comparison to mushroom. Monosaccharides content and profile varied slightly among both extracts with predominance of glucose, galactose and mannose with no uronic acids detection; Flavourzyme extract reported higher free amino acids content. Presence of alpha and beta-glycosidic structures such as glucans and glucan-protein complexes are among the polysaccharides found in both extracts. (C) 2016 Elsevier Ltd. All rights reserved.