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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Structural, thermal, and morphological characteristics of cassava amylodextrins

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Author(s):
Costa, Mariana Souza [1] ; Volanti, Diogo Paschoalini [2] ; Eiras Grossmann, Maria Victoria [3] ; Landi Franco, Celia Maria [1]
Total Authors: 4
Affiliation:
[1] UNESP Sao Paulo State Univ, Dept Food Engn & Technol, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil
[2] UNESP Sao Paulo State Univ, Dept Chem & Environm Sci, Sao Jose Do Rio Preto, SP - Brazil
[3] Univ Estadual Londrina, Dept Food Sci & Technol UEL, Londrina, PR - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Journal of the Science of Food and Agriculture; v. 98, n. 7, p. 2751-2760, MAY 2018.
Web of Science Citations: 4
Abstract

BACKGROUNDAmylodextrins from cassava starch were obtained by acid hydrolysis, and their structural, thermal and morphological characteristics were evaluated and compared to those from potato and corn amylodextrins. RESULTSCassava starch was the most susceptible to hydrolysis due to imperfections in its crystalline structure. The crystalline patterns of amylodextrins remained unchanged, and crystallinity and peak temperature increased with hydrolysis time, whereas thermal degradation temperature decreased, independent of treatment time and starch source. Cassava amylodextrins had similar structural and morphological characteristics to those from corn amylodextrins due to their A-type crystalline arrangements. A-amylodextrins were structurally and thermally more stable than potato amylodextrins (B-type). Starch nanocrystals (SNC) were observed by transmission electron microscopy from the third day of hydrolysis in cassava amylodextrins, whereas potato and corn amylodextrins displayed SNC only on the fifth day. A-SNC displayed platelet shapes, whereas B-SNC were rounded. The SNC shape was related to the packing form and geometry of unit cells of allomorphs A and B. CONCLUSIONMicrostructures (agglomerated crystalline particles) and nanostructures (double helix organization) were observed for amylodextrins. Cassava starch was shown to be a promising material for SNC production, since it requires less hydrolysis time to obtaining more stable crystals. (c) 2017 Society of Chemical Industry (AU)

FAPESP's process: 13/01500-7 - Production and characterization of nanocrystals from different sources of starch and its application in biofilms
Grantee:Mariana Souza Costa
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 14/04686-7 - Characterization of nanocrystals obtained from starches with different crystalline patterns and their application in biofilms
Grantee:Celia Maria Landi Franco
Support Opportunities: Regular Research Grants