TY - JOUR
T1 - Shrinkage and deformation of Agave atrovirens Karw tissue during convective drying
T2 - Influence of structural arrangements
AU - Gumeta-Chavez, Carolina
AU - Chanona-Perez, Jose Jorge
AU - Mendoza-Perez, Jorge Alberto
AU - Terres-Rojas, Eduardo
AU - Garibay-Febles, Vicente
AU - Gutierrez-Lopez, Gustavo F.
PY - 2011/5
Y1 - 2011/5
N2 - The influence of structural arrangements of Agave discs cut transversally (ADCT) and longitudinally (ADCL) on moisture loss, shrinkage, and shape was evaluated during convective drying by physical and image parameters. ADCT showed lower drying and shrinkage rates than ADCL. The fractal exponent (d) relating volume and thickness of samples rose from 1.552 ±0.126 to 2.394 ±0.128 and from 1.662 ±0.111 to 1.848 ±0.070 for ADCT and ADCL, respectively, which indicates that shrinkage was nonisotropic for both cases. Parameters considered for evaluating the changes of size and shape of Agave discs at macro- and microscopic levels during drying were projected area (PA), major length (ML), shape factor (SF), and fractal dimension of contour (FDC). The values obtained for these parameters demonstrated that changes in shrinkage and shape of both samples were dependent on structural arrangements of the samples. During the drying of ADCT samples, which have short and rigid structures, pronounced creasing was observed compared to ADCL materials, which are mainly formed by long and rigid structures. Also, it was observed that orientation of fibers influenced shrinkage and deformation.
AB - The influence of structural arrangements of Agave discs cut transversally (ADCT) and longitudinally (ADCL) on moisture loss, shrinkage, and shape was evaluated during convective drying by physical and image parameters. ADCT showed lower drying and shrinkage rates than ADCL. The fractal exponent (d) relating volume and thickness of samples rose from 1.552 ±0.126 to 2.394 ±0.128 and from 1.662 ±0.111 to 1.848 ±0.070 for ADCT and ADCL, respectively, which indicates that shrinkage was nonisotropic for both cases. Parameters considered for evaluating the changes of size and shape of Agave discs at macro- and microscopic levels during drying were projected area (PA), major length (ML), shape factor (SF), and fractal dimension of contour (FDC). The values obtained for these parameters demonstrated that changes in shrinkage and shape of both samples were dependent on structural arrangements of the samples. During the drying of ADCT samples, which have short and rigid structures, pronounced creasing was observed compared to ADCL materials, which are mainly formed by long and rigid structures. Also, it was observed that orientation of fibers influenced shrinkage and deformation.
UR - http://www.scopus.com/inward/record.url?scp=79956064059&partnerID=8YFLogxK
U2 - 10.1080/07373937.2010.514380
DO - 10.1080/07373937.2010.514380
M3 - Artículo
SN - 0737-3937
VL - 29
SP - 612
EP - 623
JO - Drying Technology
JF - Drying Technology
IS - 6
ER -