Rheological behavior of soluble dietary fiber fractions isolated from artichoke residues

  • Cinthia Santo Domingo
  • Ana M. Rojas
  • Eliana N. Fissore
  • Lía N. GerschensonEmail author


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 Ca2+ (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.


Cynara cardunculus Protease and hemicellulase Pectin and inulin Rheological behavior 



This study was financially supported by University of Buenos Aires (UBACyT 20020100100726/2011–2014 and 20020130100550BA/2014–2017), National Agency of Scientific and Technical Research (PICT 2012–1941 and 2013–2088) and CONICET (PIP 11220090100531/2010–2012 and 11220120100507/2013–2015). The authors acknowledge Dr Alicia Califano (CIDCA, CONICET-Universidad Nacional de La Plata) for the allowance to use the IRIS Rheohub software (USA) and Dr Lucas Marchetti for his help in the use of the software.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Compliance with ethics requirements

This article does not contain any studies with human or animal subjects.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Cinthia Santo Domingo
    • 1
    • 2
  • Ana M. Rojas
    • 1
    • 3
  • Eliana N. Fissore
    • 1
    • 3
  • Lía N. Gerschenson
    • 1
    • 3
    Email author
  1. 1.Laboratorio de Optimización de la Calidad de Alimentos Preservados, Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, LOCAPUniversidad de Buenos AiresBuenos AiresArgentina
  2. 2.National Research Council of Argentina, CONICETBuenos AiresArgentina
  3. 3.CONICETBuenos AiresArgentina

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