Ramarao, Kivaandra Dayaa Rao and Somasundram, Chandran and Razali, Zuliana and Kunasekaran, Wijenthiran and Jin, Tan Li (2022) The antioxidant properties and microbial load of Moringa oleifera leaves dried using a prototype convective air-dryer. Saudi Journal of Biological Sciences, 29 (6). ISSN 1319-562X, DOI https://doi.org/10.1016/j.sjbs.2022.103290.
Full text not available from this repository.Abstract
The recent COVID-19 pandemic resulted in major postharvest losses because most fresh produce could not be sold. Drying is an important thermal-based food preservation method which could have prolonged the shelf-life of these produce, but most drying technologies are costly, and cannot be afforded by smalltime farmers. From this context, we were interested in evaluating the drying of Moringa oleifera leaves (MOL) using a low-cost self-built prototype convective-air dryer (CAD), alongside conventional drying methods for its antioxidant properties, microbial load and phytoconstituents. Results showed total polyphenol content was the highest (p < 0.05) in our CAD samples, and it retained among the highest total flavonoid content, total antioxidant capacity, total alkaloid content and DPPH radical scavenging activity. Furthermore, methanolic CAD extract presented lower coliform and yeast and mold count than the aqueous CAD extract. We also briefly explored MOL as a sanitizer where the microbial load of the methanolic extract was comparable (p > 0.05) with several commercial non-alcoholic sanitizers, indicating its commercialization potential as a bio-friendly sanitizer. Finally, using GC-MS, we are the first to report (best of our knowledge) on the presence of caprolactam, an important bio-medical field compound, in the CAD sample's aqueous extract. (c) 2022 The Author(s). Published by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license.
| Item Type: | Article |
|---|---|
| Funders: | University of Malaya Science Faculty, GPF001B-2018 |
| Uncontrolled Keywords: | Antioxidant activity; Convective air-drying; GC-MS analysis; Microbial load; Moringa oleifera leaves; Prototype dryer |
| Subjects: | Q Science > QK Botany |
| Divisions: | Faculty of Science > Institute of Biological Sciences |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 22 Nov 2023 03:48 |
| Last Modified: | 22 Nov 2023 03:48 |
| URI: | http://eprints.um.edu.my/id/eprint/41737 |
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