Investigating the heat stability, calorimetric degradations and chromatographic polyphenolic profiling of edible macerat
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Investigating the heat stability, calorimetric degradations and chromatographic polyphenolic profiling of edible macerated hog‑tree apple leaf (Morinda lucida Benth) Olusegun Abayomi Olalere1 · Chee‑Yuen Gan1 Received: 2 July 2020 / Accepted: 29 September 2020 © Institute of Chemistry, Slovak Academy of Sciences 2020
Abstract The increasing demand for food-based bio-products has necessitated screening characterizations and microstructural elucidation. In this study, different analytical techniques were employed to investigate the thermal stability, morphological changes and phenolic profile of macerated hog-tree apple leaf. TGA peak heights from the thermo-gravimetric decomposition curve could be attributed to mass evaporation and simultaneous removal of residual moisture from the sample accounting for 0.9239 mg mass loss from 5.825 mg of the total sample. The TGA results suggest that the 87 polyphenolic metabolites recovered from the sample occurred between 71.94 °C and 243.55 °C with 3.871 mg mass loss from 5.825 mg from the total sample loading. In this region eighty-seven compounds were identified which include mainly the phenolic and flavonoids viz: isochlorogenic acid, trans-ferulaldehyde, 10-O-methylprotosappanin, moracin G, terchebin, geraniin, albaspidin AA. These has been reported in previous studies as strong antioxidant compounds. Moreover, the SEM monograph generated further elucidated the morphological changes and surface degradation of Morinda lucida Benth which resulted in the exudation of phenolic constituents. The result of this investigation could, therefore, be used as blueprints for storage and post-harvest processing of edible M. lucida Benth. Keywords Maceration · Characterization · Morinda lucida Benth · Morphology · Polyphenol · Thermal stability
Introduction Morinda lucida Benth is a herbaceous plant from the family of Rubiaceae and is grown mainly in tropical and subtropical parts of the world (Adeleye et al. 2019). There are up to 80 species from this genus which is usually grown due to the high proteinaceous seeds and flavoured leaves (Ohta et al. 2018). It is an average size tree generally with scaly grey bark, shining leaves and a multi-branching stem network having an average height of about 15 m (Adewole and Adebayo 2017). This plant has shown a remarkable nutritional benefit as food and disease prevention. The medicinal and nutritional properties are due to the presence of a significant * Olusegun Abayomi Olalere [email protected] * Chee‑Yuen Gan [email protected] 1
Analytical Biochemistry Research Centre (ABrC), Universiti Sains Malaysia (USM), 11800 Minden, Penang, Malaysia
number of alkaloids, anthraquinones, and anthraquinones (Karasawa et al. 2015). Their leaves and seed have a wide range of physiological functions such as anti-spermatogenic, hepato-protective, anticancer and diabetes treatments (Chithambo et al. 2017). The aforementioned medicinal properties of the extracts against oxidative diseases are dependent on the total phenolic content present in
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