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The effect of pulsed electric fields, ultraviolet light or high intensity light pulses in combination with manothermosonication on selected physico-chemical and sensory attributes of an orange and carrot juice blend

Paper ID Volume ID Publish Year Pages File Format Full-Text
19059 43043 2012 7 PDF Available
Title
The effect of pulsed electric fields, ultraviolet light or high intensity light pulses in combination with manothermosonication on selected physico-chemical and sensory attributes of an orange and carrot juice blend
Abstract

A blend of orange and carrot juice was processed by three selected treatments combining pulsed electric fields (PEF) (24 kV/cm, 18 Hz, 93 μs), ultraviolet light (UV) (10.6 J/cm2) or high intensity light pulses (HILP) (3.3 J/cm2), in each case, with manothermosonication (MTS) technology (400 kPa, 35 °C, 1000 W, 20 kHz). Treatment effects on selected physico-chemical and sensory properties of the juice were evaluated. No significant changes were found in non-enzymatic browning (NEBI) or antioxidant activity compared to an untreated control. However, the treatments increased all the Hunter Lab colour values, while total phenolics were significantly decreased. Each combination achieved on average 78% inactivation of pectin methyl esterase (PME). Sensory analysis showed that the colour of the product processed by hurdle combinations was preferred to that of a pasteurised sample (72 °C, 26 s), while the flavour was adversely affected by all of the non-thermal treatments. Panellists did not perceive differences in the odour, sweetness or acidity of the product. Results indicate that, under the current experimental conditions, the application of the selected combinations of non-thermal technologies resulted in a product in which certain quality attributes were somewhat inferior to those of a lightly pasteurised control juice.

► Quality of a juice blend following paired hurdle combinations (PHC) of MTS + PEF, UV or HILP was assessed. ► Non-enzymatic browning or antioxidant activity were unaffected by PHC. ► Colour changes were recorded and total phenolics were reduced by PHC. ► PME activity was partially reduced and flavour was adversely affected by PHC. ► Panellists noted unchanged odour/sweetness/acidity, improved colour, poorer flavour under PHC.

Keywords
Non-thermal hurdle processing; Sensory evaluation; Ultraviolet light (UV); High intensity light pulses (HILP); Pulsed electric field (PEF); Manothermosonication (MTS)
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The effect of pulsed electric fields, ultraviolet light or high intensity light pulses in combination with manothermosonication on selected physico-chemical and sensory attributes of an orange and carrot juice blend
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Publisher
Database: Elsevier - ScienceDirect
Journal: Food and Bioproducts Processing - Volume 90, Issue 3, July 2012, Pages 442–448
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us