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Alteration of antioxidative properties of longan flower-honey after high pressure, ultra-sonic and thermal processing

Paper ID Volume ID Publish Year Pages File Format Full-Text
19722 43122 2015 7 PDF Available
Title
Alteration of antioxidative properties of longan flower-honey after high pressure, ultra-sonic and thermal processing
Abstract

This work evaluated the effect of high hydrostatic pressure (300–500 MPa/25 °C/5–20 min), ultra-sonic (20–60% amplitude/20 kHz/5–20 min) and thermal (50–100 °C/1–5 min) processing on phenolic contents and antioxidant capacities of honey from the longan flower. Total phenolic compounds, total flavonoids and antioxidant capacity (DPPH and FRAP assays) were determined. It was found that high pressure, ultra-sonic and thermal treatments had a significant effect on antioxidative properties of honey sample. After pressurization, the quantities of total phenols, flavonoids and antioxidant capacity in honey significantly increased with the increasing pressure levels and processing times, in particular samples pressurized at 500 MPa for 20 min. Similarly, these bioactive compounds in honey samples processed by ultra-sonication were also enhanced when the amplitude levels and treatment times increased. For thermal treatments at 50 and 70 °C, all antioxidative constituents had no significant differences when compared to the control, while the sample heated at 100 °C contained the lowest levels of phenols and antioxidant capacity. Therefore, both high pressure and ultra-sonic processing are an alternative technique to preserve the antioxidative qualities of longan flower-honey, while also not affecting the nutritional values.

Keywords
Longan flower-honey; High pressure processing; Ultra-sonic processing; Thermal treatment; Antioxidative properties
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Alteration of antioxidative properties of longan flower-honey after high pressure, ultra-sonic and thermal processing
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Publisher
Database: Elsevier - ScienceDirect
Journal: Food Bioscience - Volume 10, 1 June 2015, Pages 1–7
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