Naslov
Influence of high intensity ultrasound treatments on physical properties of sheep milk

Autori
Bosiljkov, Tomislav ; Tripalo, Branko ; Ježek, Damir ; Brnčić, Mladen ; Karlović, Sven ; Dujmić, Filip

Izvornik
Hrvatski časopis za prehrambenu tehnologiju, biotehnologiju i nutricionizam (1847-3423) 7 (2012), Special Issue; 44-48

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
ultrasound; sheep milk; temperature; physical properties

Sažetak
In this study, research was based on influence of high intensity ultrasound on inhomogeneous sheep milk. Ultrasonic processor (maximal nominal power – 100W) with the constant frequency of 30 kHz was used. Changes on temperature, pH – value, density, viscosity and absorbance (500nm) are followed by given process parameters: amplitude (A = 20, 60 and 100 %) ; time of treatment (t = 2, 6, 10 and 15 minutes), full cycle (c = 1), probe diameters (d = 7, 10 and 14 mm). Statistical analysis was conducted and influence of process parameters and temperature was expressed over p – value (p<0.05 ; ANOVA ; ANCOVA). Applications of different probe diameter have significant influence on all observed physical properties. Longer time of treatment and amplitude showed significant influence on temperature, absorbance and changes on viscosity of sheep milk, while on pH – value and density has no influence. Analyses of covariance (ANCOVA) showed significant influence of the temperature on increasing of absorbance and viscosity, while temperature has no influence on pH – value and density of ultrasonically treated milk.

Izvorni jezik
Engleski

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