Physicochemical and Structural Properties of Starch Isolated from Fresh and Dried Chestnuts and Chestnut Flour

María Dolores Torres1, Ramón Moreira1*, Francisco Chenlo1,
Marie Helene Morel2 and Cécile Barron2

Department of Chemical Engineering, University of Santiago de Compostela,
Rúa Lope Gómez de Marzoa s/n, ES-15782 Santiago de Compostela, Spain

2Laboratory of Cereal Technology and Agropolymers, ENSAM–INRA, 2 place Viala, FR-34060 Montpellier Cedex 1, France

Article history:

Received July 8, 2013

Accepted December 12, 2013

Key words:
gluten-free diet, optical microscopy, particle size, amylose, damaged starch


Particle size distribution, colour, morphology and chemical composition of chestnut
(Castanea sativa Mill.) starches isolated from fresh chestnut fruits (S1), semi-dried chestnut fruits at room temperature (S2) and commercial chestnut flour (S3) were determined using several experimental techniques. All starches had a bimodal particle size distribution, particularly S1 showed two types of starch granules – small (1.5 μm diameter) and large granules (10.5 μm). Starch granule sizes depended on the moisture content of the samples, decreasing slightly in the following order S1>S2>S3; however, no significant differences were observed in the morphological analysis. Most of the granules exhibited round or oval shapes, and exceptionally, some of them featured trefoil shape, which is not usually found in other starches. Colour results indicated that S3 samples had the darkest colour, followed by S2 and S1. Tested chestnut starches showed significant differences in total starch content, with starch isolation being more selective in dried samples. All samples showed low damaged starch (<2.91 %) and intermediate amylose (from 17.0 to 25.8 %) content on dry mass basis. The lowest amount of amylose was obtained in S1, even though it was within the range of common commercial starches.



*Corresponding author:
     +34 881 816 759

                                           +34 981 528 050

Search FTB

Follow us

 facebook 1 twitter bird_icon LI In Bug


Environmental Policy

sdg publishers compact 4 300x300

QR Code


We use cookies to improve our website and your experience when using it. Cookies used for the essential operation of the site have already been set. To find out more about the cookies we use and how to delete them, see our privacy policy.

I accept cookies from this site.

EU Cookie Directive Module Information