The present work evaluated the effect of high pressure homogenization (HPH) on the physical stability of tomato juice. HPH changed the particle size distribution (PSD), pulp sedimentation behavior, serum cloudiness (turbidity), color and microstructure of the tomato juice. The effect of homogenization pressure (PH) on the disruption of suspended particles, and consequently on the other physical properties, followed an asymptotic behavior. The microstructure images confirmed the PSD analyses, and showed the leakage of lycopene after processing. HPH increased the juice stability to sedimentation, which could also be seen from the pulp sedimentation and serum cloudiness (turbidity) behaviors. The color of the juice also changed due to PH, and was in accordance with disruption of the pulp and the leakage of lycopene. Moreover, the results obtained are in agreement with previously obtained rheological data, and deal with recent trends in process–structure–function relationship studies. These results indicated that HPH could be used to increase the consistency of tomato juice, improve its sensory acceptance, reduce the need for the addition of hydrocolloids and reduce particle sedimentation and serum separation.
The present work evaluated the effect of high pressure homogenization (HPH) on the physical stability of tomato juice. HPH changed the particle size distribution (PSD), pulp sedimentation behavior, serum cloudiness (turbidity), color and microstructure of the tomato juice. The effect of homogenization pressure (PH) on the disruption of suspended particles, and consequently on the other physical properties, followed an asymptotic behavior. The microstructure images confirmed the PSD analyses, and showed the leakage of lycopene after processing. HPH increased the juice stability to sedimentation, which could also be seen from the pulp sedimentation and serum cloudiness (turbidity) behaviors. The color of the juice also changed due to PH, and was in accordance with disruption of the pulp and the leakage of lycopene. Moreover, the results obtained are in agreement with previously obtained rheological data, and deal with recent trends in process–structure–function relationship studies. These results indicated that HPH could be used to increase the consistency of tomato juice, improve its sensory acceptance, reduce the need for the addition of hydrocolloids and reduce particle sedimentation and serum separation.
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