Biopotential of Verbesina encelioides (stem and leaf powders) in silver nanoparticle fabrication

Abstract

Nanotechnology has opened new opportunities in the field of medical sciences and pharmaceuticals. Commercially, nanoparticles are in great demand in electronics, catalysis, chemistry, energy, and medicine. Today in nanoparticle production green synthesis, using biological material including medicinal plants as a starting material, is in vogue. In the present investigation the powder extract (stems and leaves) of an important medicinal plant, Verbesina encelioides, was used for the biosynthesis of bionanoparticles. The synthesized nanoparticles were screened and characterized by UV-visible spectrophotometer, scanning electron microscopy, X-ray diffraction, and FTIR analyses. The particles were then subjected to antimicrobial assay. Comparative analyses of the antimicrobial behavior of aqueous, ethanolic, and methanolic extracts and bionanoparticles against 2 bacteria (Escherichia coli and Vibrio cholerae) and 2 fungi (Aspergillus niger and A. flavus) are described.

Characterization, synergistic antibacterial and free radical scavenging efficacy of silver nanoparticles synthesized using Cassia roxburghii leaf extract

“…Jeeva et al [25] reported moderate antibacterial activity of C. coriaria AgNPs against pathogenic bacteria while Fayaz et al [26] reported enhanced antibacterial activity with antibiotics. Mahitha et al [27] and Kushwaha and Malik [28] reported antibacterial and antifungal activity of Bacopa monniera whole plant and Verbesina enceliodes leaf AgNPs respectively. Antibacterial and antifungal activities of AgNPs from Tephrosia purpurea leaf extract were reported by Ajitha et al [29].…”

Comparison of ethanolic extracts of phytoestrogenic Dendrolobium lanceolatum and non-phytoestrogenic Raphanus sativus to mediate green syntheses of silver nanoparticles

“…[7] Many works reported on the uses of plant extracts derived from many species and various parts of plants for the green synthesis of AgNPs including leaf, latex, stem, root and fruit of edible, ornamental and medicinal plants. The examples were holy basil (Ocimum sanctum), [8] garlic (Allium sativum), [9] bamboo (Bambusa arundinacea and Bambusa nutans), [10] Acalypha hispida, [11] Verbesina encelioides, [12] red ball snake gourd (Trichosanthes tricuspidata) [13] and bitter melon (Mo-mordica charantia). [14] The phytochemicals in these plant extracts, such as alkaloids, tannins, phenolics, saponins, terpenoids, proteins, vitamins and polysaccharides, were proposed to serve as reducing agents, while the complex molecules could assist a stabilization of the synthesized AgNPs.…”

Synthesis and characterization of gold nanoparticles using Hypericum perforatum and Nettle aqueous extracts: A comparison with turkevich method

“…Although most of these methods may successfully produce highly stable and well‐defined AuNPs, they have various drawbacks such as the use of environmentally harmful chemicals and expensive equipment . Therefore, green nanoparticle synthesis by microorganisms and plant extracts has gained considerableNew York City importance in recent years . The green synthesis method is more facile and eco‐friendly, and it does not require rigorous conditions or toxic agents.…”