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Physicochemical properties and antioxidant capacity of oak (Quercus resinosa) leaf infusions encapsulated by spray-drying

Paper ID Volume ID Publish Year Pages File Format Full-Text
19766 43126 2013 8 PDF Available
Title
Physicochemical properties and antioxidant capacity of oak (Quercus resinosa) leaf infusions encapsulated by spray-drying
Abstract

•Maltodextrin are better wall material than k-carrageenan to obtain high yield.•Wall material and feed flow have influence on the phenolics retention.•High antioxidant activity is obtained at high feed flow in spray-drying phenolics.

The effect of two wall materials and two feed flow rates on the physical and antioxidant properties of Quercus resinosa leaf infusion microencapsulated by spray-drying is reported. Dispersions with lyophilized Q. resinosa infusion and wall material (k-carrageenan and maltodextrin [10 DE]) were prepared. Samples were fed at rate flows of 1.6 and 1.7 L/h. Encapsulation yield, total phenolic content, DPPH test, deoxy-d-ribose assayt, rheological and SEM evaluations were made. The highest yield and DPPH scavenging activity were obtained at 100% maltodextrin and 1.7 L/h. Higher polyphenolic retention was observed in blends of carrageenan/maltodextrin (1.6 and 1.7 L/h) and maltodextrin (1.6 L/h). The highest inhibition of deoxy-d-ribose oxidation was found at blends of carrageenan/maltodextrin (1.7 L/h). Dispersions showed pseudoplastic behavior and properties as liquid-like materials. Microcapsules showed particle sizes between 5 and 35 µm. The best condition for encapsulation of Q. resinosa infusions was suggested as 100% maltodextrin at 1.7 L/h.

Keywords
Antioxidants; Herbs; Microencapsulation; Oak; Phenolics; Spray-drying
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Physicochemical properties and antioxidant capacity of oak (Quercus resinosa) leaf infusions encapsulated by spray-drying
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Publisher
Database: Elsevier - ScienceDirect
Journal: Food Bioscience - Volume 2, June 2013, Pages 31–38
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