期刊
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
卷 10, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fbioe.2022.849921
关键词
Brown algae; Cystoseira crinita; green synthesis; MgO-NPs; antimicrobial; in-vitro cytotoxicity; larvicidal; repellence activity
In this study, metabolites secreted by brown algae were used as a biocatalyst for the green synthesis of magnesium oxide nanoparticles. The fabricated nanoparticles were characterized and tested for their antimicrobial and insecticidal activities, showing promising results.
Herein, the metabolites secreted by brown algae, Cystoseira crinita, were used as biocatalyst for green synthesis of magnesium oxide nanoparticles (MgO-NPs). The fabricated MgO-NPs were characterized using UV-vis spectroscopy, Fourier transforms infrared spectroscopy (FT-IR), Transmission Electron Microscopy (TEM), Scanning Electron Microscopy linked with energy-dispersive X-ray (SEM-EDX), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Data showed successful formation of crystallographic and spherical MgO-NPs with sizes of 3-18 nm at a maximum surface plasmon resonance of 320 nm. Moreover, EDX analysis confirms the presence of Mg and O in the sample with weight percentages of 54.1% and 20.6%, respectively. Phyco-fabricated MgO-NPs showed promising activities against Gram-positive bacteria, Gram-negative bacteria, and Candida albicans with MIC values ranging between 12.5 and 50 mu g mL(-1). The IC50 value of MgO-NPs against cancer cell lines (Caco-2) was 113.4 mu g mL(-1), whereas it was 141.2 mu g mL(-1) for normal cell lines (Vero cell). Interestingly, the green synthesized MgO-NPs exhibited significant larvicidal and pupicidal activity against Musca domestica. At 10 mu g mL(-1) MgO-NPs, the highest mortality percentages were 99.0%, 95.0%, 92.2%, and 81.0% for I, II, III instars' larvae, and pupa of M. domestica, respectively, with LC50 values (3.08, 3.49, and 4.46 mu g mL(-1)), and LC90 values (7.46, 8.89, and 10.43 mu g mL(-1)), respectively. Also, MgO-NPs showed repellence activity for adults of M. domestica at 10 mu g mL(-1) with 63.0%, 77.9%, 84.9%, and 96.8% after 12, 24, 48, and 72 h, respectively.
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