Comparing equivalent thermal, high pressure and pulsed electric field processes for mild pasteurization of orange juice. Part I: Impact on overall quality attributes

Effect of UV-C irradiation and heat treatment on the shelf life stability of a lemon–melon juice blend: multivariate statistical approach

“…Therefore, mild heat pasteurization over the range of 70 to 72°C have begun to be applied in many studies to ensure high quality in several types of fruit juices (Timmermans et al, 2011). The FDA has also recommended a minimum temperature (71.1°C) and time (3 s) for pasteurization of food products over the pH range of 3.6 and 4.0 (FDA, 2004).…”

Moderate and high intensity pulsed electric fields : Effect on microbial inactivation, shelf life and quality of fruit juices

“…The aim in this study was to evaluate if processing, either by moderate intensity PEF and long pulse duration or thermal treatment, changes these values compared to untreated juice. For both juices A and B, the values for soluble solids of PEF treated and thermal treated juice were not different from untreated juice, being 11.1 ± 0.1 °Brix for juices A and 11.6 ± 0.1 °Brix for juices B, which can be considered as a normal value (Bull et al, 2004;Hartyáni et al, 2011;Nagy & Smoot, 1977;Timmermans et al, 2011). Also the pH value for juice A and B did not change by thermal or PEF treatment, and values for juices A and B were pH = 3.51 ± 0.01 and pH = 2.99 ± 0.02, respectively.…”

“…High intensity PEF processing of citrus juices at moderate temperatures (T < 60 °C), showed only a minimal impact on the physicochemical quality properties (pH, soluble solids, electric conductivity, colour, viscosity), nutritional values (vitamin C content, carotenoids) and the sensorial quality when compared to untreated juice (Cserhalmi et al, 2006;Hartyáni et al, 2011;Timmermans et al, 2011;Vervoort et al, 2011).…”

“…The PEF system used was a continuous-flow system, where the configuration was a downscaled copy from the pilot-scale PEF equipment described by Mastwijk (2006) and Timmermans et al (2011) and from an industrial scale system of 1500 L/h capacity. Specific attention was paid to design criteria, to guarantee the homogeneity of the electric field when downscaling the treatment device.…”

“…The technical drawing of the treatment chamber is provided by Mastwijk et al (2007) and the process setup is discussed in detail by Timmermans et al (2011). In short, a co-linear treatment chamber with diameter of 10mm and a gap of 20mm was used.…”