DIC Texturing for Solvent Extraction

  • Tamara Allaf
  • Baya Berka Zougali
  • Cuong Van Nguyen
  • Mohamed Negm
  • Karim Allaf
Part of the Food Engineering Series book series (FSES)


Because of the natural structure of plants, which oppose resistance to penetration by any liquid, solvent extraction is very slow. The kinetics involves multiple serial steps and internal diffusion is generally the limiting process. Moreover, during the extraction of bioactive molecules from a natural product, volatile compounds are also extracted and consequently this lowers the final quality of the extract, rendering deodorization a necessity.

Instant controlled pressure drop (DIC) technology is a thermomechanical process in which raw material is exposed for a short period of time to high saturated steam pressure followed by an abrupt pressure drop towards a vacuum. This triggers the autovaporization of the volatile compounds present in the matrix, which results in an expansion of the sample and an instant cooling of the material.

DIC technology was introduced to deodorize the matrix and/or enhance solvent extraction.


Solvent Extraction Effective Diffusivity Rosmarinic Acid Carnosic Acid Solvent Diffusion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Tamara Allaf
    • 1
  • Baya Berka Zougali
    • 2
  • Cuong Van Nguyen
    • 3
  • Mohamed Negm
    • 4
  • Karim Allaf
    • 5
  1. 1.ABCAR-DIC ProcessLa RochelleFrance
  2. 2.Laboratory of Research on Bio-active Products and Valorization of BiomasseEcole Normale SupérieureAlgerAlgeria
  3. 3.College of Engineering Technology, Can Tho UniversityCan ThoVietnam
  4. 4.Department of Special Food and Nutrition, ARCFood Technology Research InstituteGizaEgypt
  5. 5.Laboratory of Engineering Science for Environment (LaSIE FRE 3474) CNRSUniversity of La Rochelle, La RochelleLa Rochelle Cedex 01France

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