Synthesis and characterization of microbial mediated cadmium oxide nanoparticles

Abstract

Microbial mediated synthesis of metallic nanoparticles constitutes as effective and promising approach for the development of antibacterial materials in the field of bioengineering and biomedicine. We prepared Cadmium oxide nanoaprticles (CdO NPs) utilizing Penicillium oxalicum, and cadmium acetate solution via coprecipitate method. The elemental composition and morphology of these synthesized CdO NPs were examined through X-ray diffraction (XRD), UV-Vis absorption spectroscopy, Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), and Energy dispersive spectroscopy (EDS). Furthermore, we evaluated the bactericidal potential of prepared CdO NPs using Escherichia coli (E.coli), Staphylococcus aureus (S.aureus), Bacillus cereus (B.cereus), and Pseudomonas aeruginosa (P. aeruginosa). Dimethyl sulfoxide was used as negative control while erythromycin was used as positive control. The XRD spectrum revealed cubic crystalline nanoparticles with 22.94 nm size and UV showed absorbance peak at 297 nm with 2.5 eV band gap energy. FTIR depicted O─H and carboxylic groups along with CdO stretching vibration. EDS showed the presence of organic compounds on Cd and O over NPs surface. SEM results revealed the spherical shape of the CdO NPs. The synthesized NPs exhibited highly potent bactericidal activity against selected strains and demonstrated less optical density of 0.086 after 24 hr. Owing to the significant antibacterial activity of CdO NPs, the broad application prospects of these nanoparticles CdO NPs in extensive biomedical applications is indicated.

A Potential Valorization Strategy of Wine Industry by-Products and Their Application in Cosmetics—Case Study: Grape Pomace and Grapeseed

“…These results were expected since it is reported that polyphenolic extracts are more effective against Gram-positive bacteria. Gram-negative microorganisms have a unique cell structure, with a double phospholipidic layer, which is responsible for the low susceptibility of these bacteria due to the repulsion between PC and the lipopolysaccharide present on the surface of the bacteria membrane [53]. According to the literature, bacteria from the Staphylococcus family, are the most susceptible to the action of PC, which is compatible with the obtained results [52,54].…”

Green Synthesis of Silver Nanoparticles Using Euphorbia wallichii Leaf Extract: Its Antibacterial Action against Citrus Canker Causal Agent and Antioxidant Potential

“…JDX-3432, JEOL, Japan was used for XRD pattern analysis of the synthesized nanoparticles, following the protocol of Asghar et al [ 39 ]. The average size of crystallite was measured using Debye–Scherrer equation, which is calculated by D = k λ/βcosθ,…”

Impact of Lysinibacillus macroides, a potential plant growth promoting rhizobacteria on growth, yield and nutritional value of tomato Plant (Solanum lycopersicum L. f1 hybrid Sachriya)

“…Enhanced DPPH radical quenching activity was noted in S. lycopersicum samples treated with compost infused with plant growth promoting bacteria. Mechanism related to enhanced antioxidant activity could be due to the elevation in the expression of antioxidant genes that confer homeostasis in the plant metabolism (64,65). Cucumis sativus infused with Promicro monospora, Burkholdera cepacia, and Acinetobacter calcoaceticus showed enhanced phenol production due to upregulation of antioxidant enzymes (66).…”