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Cynara cardunculus var. scolymus agroindustrial by-products (stems, outer bracts, leaves) constitute 80% of the plant. These by-products may be recovered for the extraction of food additives and nutraceuticals. In this research, the rheological behavior of soluble dietary fiber fractions isolated from bracts (B) and stems (S) of artichoke was studied. Fractions were isolated by means of a heat treatment followed by processing with sodium citrate buffer (S1, B1) or buffer/protease (S2, B2) or hemicellulase (S3, B3) or both enzymes (S4, B4). They were composed, mainly, by pectin (degree of methylation, DM ≤ 53%) and inulin. When dissolved in water (2.00% w/v) with Ca 2+ (40 mg/g pectin), fractions were sensitive to the ion showing shear thinning flow, with initial yield stress in the case of B2, B3 or S3. Citrate buffer extracted fractions (B1, S1) showed the highest viscosities, whereas extraction with buffer and both enzymes (B4, S4) produced the least viscous fiber fractions. At rest assays revealed the formation of gel-like networks that were stronger, in general, in the presence of higher pectin and inulin content, homogalacturonan proportion, and low methylation degree. Leftovers of artichoke can be used to extract soluble dietary fiber fractions that might be utilized as natural thickeners and gelling agents in foods, pharmaceutical and cosmetics, helping to add value to raw materials and to close the bioeconomy loop in relation to this plant. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.


Documento: Artículo
Título:Rheological behavior of soluble dietary fiber fractions isolated from artichoke residues
Autor:Domingo, C.S.; Rojas, A.M.; Fissore, E.N.; Gerschenson, L.N.
Filiación:Laboratorio de Optimización de la Calidad de Alimentos Preservados, Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, LOCAP, Universidad de Buenos Aires, Buenos Aires, Argentina
National Research Council of Argentina, CONICET, Buenos Aires, Argentina
CONICET, Buenos Aires, Argentina
Palabras clave:Cynara cardunculus; Pectin and inulin; Protease and hemicellulase; Rheological behavior; Additives; Alkylation; Enzymes; Extraction; Methylation; Plants (botany); Polysaccharides; Rheology; Shear flow; Shear thinning; Sodium compounds; Yield stress; Agroindustrial by-product; Cynara cardunculus; Degree of methylations; Hemicellulases; Pectin and inulin; Rheological behaviors; Shear thinning flow; Soluble dietary fiber; Fibers
Título revista:European Food Research and Technology
Título revista abreviado:Eur. Food Res. Technol.


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---------- APA ----------
Domingo, C.S., Rojas, A.M., Fissore, E.N. & Gerschenson, L.N. (2019) . Rheological behavior of soluble dietary fiber fractions isolated from artichoke residues. European Food Research and Technology.
---------- CHICAGO ----------
Domingo, C.S., Rojas, A.M., Fissore, E.N., Gerschenson, L.N. "Rheological behavior of soluble dietary fiber fractions isolated from artichoke residues" . European Food Research and Technology (2019).
---------- MLA ----------
Domingo, C.S., Rojas, A.M., Fissore, E.N., Gerschenson, L.N. "Rheological behavior of soluble dietary fiber fractions isolated from artichoke residues" . European Food Research and Technology, 2019.
---------- VANCOUVER ----------
Domingo, C.S., Rojas, A.M., Fissore, E.N., Gerschenson, L.N. Rheological behavior of soluble dietary fiber fractions isolated from artichoke residues. Eur. Food Res. Technol. 2019.