Hydrolysis of the low gelatinization temperature Araucaria angustifolia pine seed starch

Thermal, rheological and structural properties
  • Geisa Liandra de Andrade de Siqueira
  • Ana Claudia da Silveira
  • Simone Rosa da Silveira Lazzarotto
  • Rossana Catie Bueno de Godoy
  • Egon Schnitzler
  • Marcelo LazzarottoEmail author


Starch is the most abundant carbohydrate found in grains, roots and tubers. Modified starches are employed to overcome most of native starch limitations in industrial applications. Pinhão is the seed of Araucaria angustifolia and starch is approximately 36% of its composition. Acid hydrolysis changes the starch physicochemical properties without impairing the granular structure. The native and hydrochloric acid- modified (0.1 and 0.5 mol L−1) pinhão starches were investigated using thermal (TG-DTA and DSC), rheological (RVA), structural (XRD and SEM) and statistical analysis (ANOVA and Tukey). The aim of this study was to evaluate the effects of acid modification of pinhão starches in aqueous solutions. The starches were chosen because of their low gelatinization temperature (below 60 °C). TG-DTA results in air atmosphere showed that treated samples presented higher thermal stability. The same analysis using nitrogen atmosphere showed similarities between the samples. DSC results indicate that highest acid concentrations promoted crystallinity reduction and losses in the internal structure of the granule. The genetic sources demonstrated different behaviors. The viscosity parameters decreased with the intensity of acid treatment. The XRD identified the type C pattern for the starches and the relative crystallinity increased according to the intensity of the acid hydrolysis. Superficial changes in the granules were observed by SEM. Therefore, modified pinhão starch has potential use for industrial applications. Further studies are necessary to extend these applications.


Modified pinhão starch Thermal analysis TG-DTA DSC RVA Starch structural evaluation 



The authors would like to thank the Gregory P. Burke for the language correction of this manuscript. The authors express their sincere thanks to CAPES and CNPq (306930/2016-1) for the financial support during this work. Dr. Marcelo Lazzarotto and Dra. Rossana Catie Bueno de Godoi acknowledge the encouragement and support of EMBRAPA, Universidade Estadual de Ponta Grossa e Universidade Federal do Paraná in this work.

Supplementary material

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Supplementary material 1 (DOCX 55 kb)


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  • Geisa Liandra de Andrade de Siqueira
    • 1
  • Ana Claudia da Silveira
    • 2
  • Simone Rosa da Silveira Lazzarotto
    • 1
  • Rossana Catie Bueno de Godoy
    • 3
  • Egon Schnitzler
    • 1
  • Marcelo Lazzarotto
    • 2
    • 3
    Email author
  1. 1.Universidade Estadual de Ponta GrossaPonta GrossaBrazil
  2. 2.Universidade Federal do ParanáCuritibaBrazil
  3. 3.EMBRAPA FlorestasColomboBrazil

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