Effect of high voltage dielectric barrier discharge (DBD) atmospheric cold plasma treatment on physicochemical and functional properties of taro (Colocasia esculenta) starch.

Autor: Gupta RK; Agricultural and Food Engineering Department, Indian Institute of Technology, Kharagpur 721302, West Bengal, India. Electronic address: rk86214@kgpian.iitkgp.ac.in., Guha P; Agricultural and Food Engineering Department, Indian Institute of Technology, Kharagpur 721302, West Bengal, India., Srivastav PP; Agricultural and Food Engineering Department, Indian Institute of Technology, Kharagpur 721302, West Bengal, India.
Jazyk: angličtina
Zdroj: International journal of biological macromolecules [Int J Biol Macromol] 2023 Dec 31; Vol. 253 (Pt 2), pp. 126772. Date of Electronic Publication: 2023 Sep 06.
DOI: 10.1016/j.ijbiomac.2023.126772
Abstrakt: The goal of the proposed study is to investigate the effects of three different power levels (30, 32 and 34 kV) and exposure time (2, 4 and 8 min) of dielectric barrier discharge (DBD) atmospheric cold plasma treatment on the functional and physicochemical characteristics of taro starch. Investigations were done into how different treatments impact the multi-structural, functional and physicochemical attributes of taro starch. The findings showed that cold plasma treatments substantially impacted starch granule shapes (3.60-2.54 μm), such as reduced aggregations and developed fissures on granule surface due to the generation of an etching by plasma species and enhancement in the surface topography and roughness of treated starch as compared with native by SEM and AFM analysis. Besides this, no variations were detected in the functional groups of taro starch using FT-IR analysis after cold plasma treatments. However, the A-type pattern in the XRD did not affect it, while a reduction in relative crystallinity (14.20-11.50 %) was seen as a function of the active plasma species depolymerization. Furthermore, depending on the cold plasma voltage and treatment time, amylose content (20.12-15.98 %), paste clarity (24.48-31.27 %), solubility (0.41-65.53 %), freezing thaw stability (% syneresis) (32.10-42.58 %), color properties (L*, 94.79-97.52), whiteness index (79.37-84.66), molecular weight distribution (Peak 1, 12.79-5.35 × 10 8  g/mol; Peak 2, 4.20-1.56 × 10 7  g/mol) and in vitro digestibility (RDS, 64.10-64.08 %) significantly changed. So, based on these excellent properties, this study suggested that cold plasm-treated taro starch can be used in the field of food packaging material, functional food and pharmaceutical products. Therefore, a potential approach for physically altering starch is plasma treatment.
Competing Interests: Declaration of competing interest The authors certify that none of their known financial conflicts of interest or close personal ties might have seemed to have influenced the research presented in this study.
(Copyright © 2023 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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