Food and Bioprocess Technology

, Volume 8, Issue 7, pp 1503–1511 | Cite as

Ultrasound-Assisted Air-Drying of Apple (Malus domestica L.) and Its Effects on the Vitamin of the Dried Product

  • Fabiano A. N. Fernandes
  • Sueli Rodrigues
  • Juan A. Cárcel
  • José V. García-Pérez
Original Paper


This work has examined the influence of ultrasonic-assisted air-drying on the dehydration of apple (Malus domestica L. var Royal Gala) and its influence in the availability of vitamins A, B1, B2, B3, B5, B6, and E of the dried product. This study also has estimated the effective water diffusivity in air-drying process subjected to ultrasonic waves. The water effective diffusivity increased by up to 79 % by ultrasound application, which caused a reduction of about 35 % in the total drying time compared to the air-drying without sonication. The application of ultrasound increased the availability of vitamins B1, B2, B3, and B6 in the dried product. A loss of vitamins B5 and E were observed for all studied drying conditions.


Malus domestica L. Apple Drying Ultrasound Vitamins 



Half-length of the cubic sample (m)


Sample (dried apple) absorbance


Control (raw apple) absorbance


Effective diffusivity (m2/s)


Time (s)


Average moisture content of the fruit (gwater/gdry solids)


Critical moisture content (gwater/gdry solids)


Equilibrium moisture content (gwater/gdry solids)



The authors thank the financial support of the Brazilian funding agency CNPq and the Spanish Ministerio de Economía y Competitividad and FEDER (Ref. DPI2013-37466-C03-03).


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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • Fabiano A. N. Fernandes
    • 1
  • Sueli Rodrigues
    • 2
  • Juan A. Cárcel
    • 3
  • José V. García-Pérez
    • 3
  1. 1.Departamento de Engenharia QuímicaUniversidade Federal do CearaFortalezaBrazil
  2. 2.Departamento de Tecnologia dos AlimentosUniversidade Federal do CearaFortalezaBrazil
  3. 3.Grupo de Análisis y Simulación de Procesos Agroalimentarios, Food Technology DepartmentUniversitat Politècnica de ValènciaValenciaSpain

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