Microencapsulated lycopene for pre-extrusion coloring of foods

Sheetal Choudhari, Ishwar Bajaj, Rekha Singhal, Mukund Karwe

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


The effect of extrusion conditions on the retention of lycopene during extrusion of rice flour, chosen as a model, was evaluated as a function of moisture content, screw speed and die temperature by response surface methodology using central composite rotatable design (CCRD). Experiments were carried out by extrusion of rice flour containing 1% lycopene microcapsules and free lycopene equivalent to that present in the microcapsules, using a single-screw extruder at a constant feed rate of 55 g/min. At all conditions of extrusion, the microencapsulated lycopene gave better retention of color in the extrudates than the free lycopene. The quadratic model developed by CCRD showed a good agreement between the experimental and predicted values of color. The storage stability of microencapsulated lycopene increased twofold as compared to free lycopene over a period of 96 h.

Original languageEnglish (US)
Pages (from-to)91-103
Number of pages13
JournalJournal of Food Process Engineering
Issue number1
StatePublished - Feb 2012

All Science Journal Classification (ASJC) codes

  • Food Science
  • Chemical Engineering(all)


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