Search Results

You are looking at 1 - 2 of 2 items for

  • Author or Editor: V.M. Gómez-López x
  • Refine by Access: All Content x
Clear All Modify Search

Passion fruit juice (PFJ) has a delicate flavour, very susceptible to thermal degradation. This study pursued to test the effect of sonication as non-thermal preservation method on some quality parameters of PFJ. The effect of ultrasound (20 kHz, 263 W, 89.25 μm) on the indigenous microflora, colour, pH, and ascorbic acid content of PFJ was studied. Firstly, the kinetic of microbial inactivation was determined for aerobic mesophilic bacteria and yeasts. Data was fitted to Weibull model, and a treatment time of 8 min was selected for stability studies. To this, untreated and sonicated juice was stored at 4 and 10 ºC up to 10 days and microbial quality, instrumental colour, pH, and ascorbic acid content were evaluated. In general, ultrasound kept juice microbiologically stable for up to 10 days at 4 ºC without markedly affecting other parameters evaluated. Ultrasound seems suitable to stabilize PFJ microbiologically.

Restricted access