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Solution combustion method for synthesis of ZnO NPs from Syzygium hemisphericum bark extract and a comparative analysis of the same with the crude bark extract for biomedical applications

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Abstract

This study is aimed at the bio-fabrication of zinc oxide nanoparticles (SHB@ZnO NPs) from the aqueous bark extract of Syzygium hemisphericum (SHBW) and their comparative analysis for biomedical applications. The FT-IR spectra reveal the Zn–O bond by the appearance of peaks at 411 cm−1 and 398 cm−1. Further, the peak at 370 nm in UV–Vis spectra analysis affirms the same. The X-ray diffraction reveals the ultrafine structure of NPs (10 nm). The morphology of the NPs depends on fuel load as analyzed from FESEM images. A prodigious antioxidant activity of SHBW was observed compared to ZnO NPs with IC50 values of 8.877 ± 0.14 µg/mL and 236.74 ± 2.55 µg/mL, respectively. SHBW showed a markable α-amylase (37.68 ± 2.33 µg/mL) and α-glucosidase (37.68 ± 2.33 µg/mL) inhibitory activity compared to the SHB@ZnO-20. The antibacterial activity of synthesized NPs was observed against a wide range of strains. The HRBC membrane stabilization assay was carried out to substantiate the non-toxic nature toward human RBC’s (71.30% for SHBW and 46.96% for SHB@ZnO-20). The anticancer activity of ZnO NPs utilizing a definite volume of reducing agent was analyzed against A431 cancer cell lines which revealed that the cell viability decreased as NPs concentration (64.80% at 50 µg/mL) increased.

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Acknowledgements

The authors are thankful to the DST-PURSE laboratory, at Mangalore University, for providing the FESEM-EDS and UV-Vis characterization techniques.

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Correspondence to G. Krishnakumar.

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Sushmitha, C.H., Krishnakumar, G. & Navada, K.M. Solution combustion method for synthesis of ZnO NPs from Syzygium hemisphericum bark extract and a comparative analysis of the same with the crude bark extract for biomedical applications. Chem. Pap. 78, 3443–3462 (2024). https://doi.org/10.1007/s11696-024-03319-3

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  • DOI: https://doi.org/10.1007/s11696-024-03319-3

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