TY - JOUR
T1 - Evaluation of the mechanical damage on wheat starch granules by SEM, ESEM, AFM and texture image analysis
AU - Barrera, Gabriela N.
AU - Calderón-Domínguez, Georgina
AU - Chanona-Pérez, Jorge
AU - Gutiérrez-López, Gustavo F.
AU - León, Alberto E.
AU - Ribotta, Pablo D.
N1 - Funding Information:
The authors would like to acknowledge Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Secretaría de Ciencia y Tecnología (UNC), Ministerio de Ciencia y Tecnología de Córdoba, CONACYT, Secretaría Académica del Instituto Politécnico Nacional (IPN) and Cátedra Coca-Cola para jóvenes investigadores 2011 for its financial support. P.D. Ribotta would like to thank Universidad Nacional de Córdoba for the mobility grant.
PY - 2013
Y1 - 2013
N2 - The effect of mechanical damage on wheat starch granules surface, at a microstructural level, was investigated by scanning electron microscopy (SEM), environmental scanning electron microscopy (ESEM), atomic force microscopy (AFM), and image textural analysis. The SEM and ESEM images of the native sample showed that the starch granules had smooth, flat surfaces and smooth edges. The samples with higher damaged starch content exhibited granular distortion, irregularity and less uniformity. The fractal dimension of contour parameter increased with mechanical damage, indicating that the surface irregularities quantitatively increased due to the damage. The surfaces of damaged granules showed depressions of different shapes and sizes. The roughness parameters and fractal dimension of the surface increased as a result of the mechanical damage. The surface of damaged granules showed higher entropy and lower homogeneity values when damaged starch increased. The results indicated that the mechanical process caused structural modifications at nano level.
AB - The effect of mechanical damage on wheat starch granules surface, at a microstructural level, was investigated by scanning electron microscopy (SEM), environmental scanning electron microscopy (ESEM), atomic force microscopy (AFM), and image textural analysis. The SEM and ESEM images of the native sample showed that the starch granules had smooth, flat surfaces and smooth edges. The samples with higher damaged starch content exhibited granular distortion, irregularity and less uniformity. The fractal dimension of contour parameter increased with mechanical damage, indicating that the surface irregularities quantitatively increased due to the damage. The surfaces of damaged granules showed depressions of different shapes and sizes. The roughness parameters and fractal dimension of the surface increased as a result of the mechanical damage. The surface of damaged granules showed higher entropy and lower homogeneity values when damaged starch increased. The results indicated that the mechanical process caused structural modifications at nano level.
KW - AFM
KW - Damaged starch
KW - ESEM
KW - SEM
UR - http://www.scopus.com/inward/record.url?scp=84882784499&partnerID=8YFLogxK
U2 - 10.1016/j.carbpol.2013.07.056
DO - 10.1016/j.carbpol.2013.07.056
M3 - Artículo
SN - 0144-8617
VL - 98
SP - 1449
EP - 1457
JO - Carbohydrate Polymers
JF - Carbohydrate Polymers
IS - 2
ER -