Abstract
Abstract
Moringa oleifera leaves are an important source of dietary phytochemicals, such as flavonoids with high antioxidant activity (AOA). These components are however influenced by the post-harvest treatments applied as well as the processing conditions. Hence, it is crucial to determine the most appropriate post-harvest treatment that preserves or enhances AOA. To this effect the influence of steam blanching, fermentation / oxidation, oven drying and roasting of fresh Moringa leaves on their AOA was investigated. Processing conditions of time and temperature for each treatment were optimised using response surface methodology. The effect of the different treatments at optimal conditions on phenolic profile and AOA were compared. Roasting achieved the most significant (p < 0.05) improvement in phenolics (43%) and AOA (22–31%), which was accompanied by the formation of 2 new compounds, quercetin-3-O-acetylglucoside and Quercetine-3-O-rhamnoside. Steam blanching had the most deleterious effect on phenolics (− 31%) and AOA. Post-harvest treatments qualitatively and quantitatively affect phytochemical profile of Moringa leaves.
Graphical abstract
Funder
The World Academy of Sciences
Publisher
Springer Science and Business Media LLC
Reference51 articles.
1. Adefegha, S. A., & Oboh, G. (2011). Enhancement of total phenolics and antioxidant properties of some tropical green leafy vegetables by steam cooking. Journal of Food Processing and Preservation, 35, 615–622. https://doi.org/10.1111/j.1745-4549.2010.00509.x.
2. Agamou, J. A. A., Fombang, E. N., & Mbofung, C. M. F. (2015). Particular benefits can be attributed to Moringa oleifera lam leaves based on origin and stage of maturity. Journal of Experimental Biology and Agricultural Sciences, 3(6), 541–555. https://doi.org/10.18006/2015.3(6).541.555.
3. Al-Juhaimi, F., Ghafoor, K., Özcan, M. M., Jahurul, M. H. A., Babiker, E. E., Jinap, S., … Zaidul, I. S. M. (2018). Effect of various food processing and handling methods on preservation of natural antioxidants in fruits and vegetables. Journal of Food Science and Technology, 55(10), 3872–3880. https://doi.org/10.1007/s13197-018-3370-0.
4. Amin, I., Norazaidah, Y., & Hainida, K. I. (2006). Antioxidant activity and phenolic content of raw and blanched Amaranthus species. Food Chemistry, 94, 47–52. https://doi.org/10.1016/j.foodchem.2004.10.048.
5. Barek, M. L., Hasmadi, M., Zaleha, A. Z., & Fadzelly, A. B. M. (2015). Effect of different drying methods on phytochemicals and antioxidant properties of unfermented and fermented teas from Sabah Snake Grass (Clinacanthus nutans Lind.) leaves. International Food Research Journal, 22, 661–670.
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