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Abstract:

Fick's diffusional model was used to fit drying curves of corn kernel in which the endosperm and germ were modeled as a homogeneous sphere with the pericarp being part of the external mass transfer resistance. Drying curves of whole and dehulled kernels were determined at 50°C and 60°C together with the equilibrium moisture contents at the respective temperatures. Diffusion coefficients for the corn kernel without pericarp and for the pericarp alone were determined by fitting the experimental drying curves to the diffusional model. It was found that moisture diffuses about eight times faster through the endosperm and germ than through the pericarp. The permeabilities of the pericarp at 50°C and 60°C were 1·8 × 10-7 and 1·6 × 10-7 g cm/cm2 atm s, respectively. © 1990.

Registro:

Documento: Artículo
Título:The use of a diffusional model in determining the permeability of corn pericarp
Autor:Tolaba, M.P.; Suarez, C.; Viollaz, P.E.
Filiación:Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, (1428) Buenos Aires, Argentina, Argentina
Palabras clave:Diffusion--Mathematical Models; Drying--Mathematical Models; Moisture; Corn Kernels; Corn Pericarp Permeability Determination; Food Products
Año:1990
Volumen:12
Número:1
Página de inicio:53
Página de fin:66
DOI: http://dx.doi.org/10.1016/0260-8774(90)90019-5
Título revista:Journal of Food Engineering
Título revista abreviado:J Food Eng
ISSN:02608774
CODEN:JFOED
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02608774_v12_n1_p53_Tolaba

Referencias:

  • Crank, Park, (1968) Diffusion in Polymers, , Academic Press, London and New York
  • Henderson, Physical absorption of non-uniform surfaces (1952) J. Chem. Phys., 33, pp. 29-32
  • Luikov, (1968) Analytical Heat Diffusion Theory, , Academic Press, London and New York
  • MacMasters, Important aspects of kernel structure (1962) Transactions of the ASAE, 5, pp. 247-249
  • Purdy, Crane, Influence of pericarp on diffusional drying rate in ‘Mature’ corn (1967) Crop Science, 7, pp. 379-381
  • Suarez, Effectiveness of ethyl oleate dipping, steam blanching and other pretreatments on drying of corn kernels (1987) Lebensm.-Wiss. u.-Technol., 20, pp. 123-127
  • Suarez, Loncin, Chirife, A preliminary study on the effect of ethyl oleate dipping treatment on drying rate of grain corn (1984) Journal of Food Science, 49, pp. 236-238
  • Syarief, Gustafson, Morey, Moisture diffusion coefficients for yellow-dent corn components (1987) Trans. ASAE, 30 (2), pp. 522-528
  • Walton, White, Ross, A cellular diffusion-based drying model of corn (1988) Trans. ASAE, 31 (1), pp. 279-283
  • Wolf, Buzan, MacMasters, Rist, Structure of the mature corn kernel. II. Microscopic structure of pericarp, seed, coat, and hilar layer of dent corn (1952) Cereal Chemistry, 29, pp. 335-347

Citas:

---------- APA ----------
Tolaba, M.P., Suarez, C. & Viollaz, P.E. (1990) . The use of a diffusional model in determining the permeability of corn pericarp. Journal of Food Engineering, 12(1), 53-66.
http://dx.doi.org/10.1016/0260-8774(90)90019-5
---------- CHICAGO ----------
Tolaba, M.P., Suarez, C., Viollaz, P.E. "The use of a diffusional model in determining the permeability of corn pericarp" . Journal of Food Engineering 12, no. 1 (1990) : 53-66.
http://dx.doi.org/10.1016/0260-8774(90)90019-5
---------- MLA ----------
Tolaba, M.P., Suarez, C., Viollaz, P.E. "The use of a diffusional model in determining the permeability of corn pericarp" . Journal of Food Engineering, vol. 12, no. 1, 1990, pp. 53-66.
http://dx.doi.org/10.1016/0260-8774(90)90019-5
---------- VANCOUVER ----------
Tolaba, M.P., Suarez, C., Viollaz, P.E. The use of a diffusional model in determining the permeability of corn pericarp. J Food Eng. 1990;12(1):53-66.
http://dx.doi.org/10.1016/0260-8774(90)90019-5