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- Title
Cotton tree (Bombax ceiba L.) flower stamen extract: Turning a food ingredient into a reducing agent for the green synthesis of silver nanoparticles.
- Authors
Sakoolrud Raunmoon; Supakid Sachak; Waranya Thong-in; Boonyakorn Sonkhayan; Pitak Nasomjai; Phichaya Khamai; Arthid Thim-uam; Paideang Khwanchai; Chee O. Too; Widsanusan Chartarrayawadee
- Abstract
Cotton tree (Bombax ceiba L.) flower stamen has been used widely as a northern Thai food ingredient. In this work, microwave extraction was applied to obtain the Bombax ceiba L. (BOMBAX) flower stamen extract for use as a reducing agent in the green synthesis of silver nanoparticles (AgNPs). The concentration of BOMBAX used was in the range of 0.05 to 0.25 wt%. Quasi-spherical and semi-rectangular shapes of AgNPs were obtained. The synthesized AgNPs showed a high mean zeta potential value of more than -30 mV, indicating the long-term stability and superior dispersity of AgNPs due to the repulsion of negative charges. Furthermore, the antibacterial potency of the synthesized AgNPs affords a good inhibition zone for both gram-negative and gram-positive bacteria, especially the gram-negative and antibiotic-resistant bacteria Pseudomonas aeruginosa, showing an inhibition zone diameter of 19.4±0.4 mm compared with that of chlophenicol (13.0±0.0 mm). This result suggests that the synthesized AgNPs present good colloidal stability and show good potential as an antibacterial agent for antibiotic-resistant bacteria, especially P. aeruginosa.
- Subjects
SEA Island cotton; SILVER nanoparticles; REDUCING agents; STAMEN; DRUG resistance in bacteria; RAMAN scattering; RHAMNOLIPIDS
- Publication
ScienceAsia, 2024, Vol 50, Issue 1, p1
- ISSN
1513-1874
- Publication type
Article
- DOI
10.2306/scienceasia1513-1874.2024.030