No abstract

No abstract

The effect of different ultra-high pressure homogenisation (UHPH) treatments on physicochemical and sensorial properties of orange juice was studied in comparison with thermal pasteurisation (90°C, 1 min). UHPH treatments consisted on combinations of two inlet temperatures (10 or 20°C) and three pressures (100, 200 and 300 MPa). Effect of treatments was assessed on general quality parameters (colour, pH,°Brix, titratable acidity, reducing sugars and non-enzymatic browning index), particle size distribution and cloud stability. None of the UHPH treatments caused significant differences in the°Brix, reducing sugars, pH and non-enzymatic browning index with respect of fresh or pasteurised juice. Only titratable acidity was significantly lower when inlet temperature of UHPH treatments was 20°C. UHPH treatments significantly reduced the particle size and in consequence the cloudiness and the total colour value (ΔE*) increased. The overall consumer acceptability of UHPH and pasteurised juices was similar.

No abstract