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Glucuronoxylan-mediated silver nanoparticles: green synthesis, antimicrobial and wound healing applications

机译：葡萄糖醛酸木聚糖介导的银纳米颗粒：绿色合成，抗菌和伤口愈合应用

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Hydrogel forming polysaccharides are attracting attention for the design of diverse nature silver nanoparticles (Ag NPs) with potential biological applications. Herein, we report the green synthesis of Ag NPs and their antimicrobial activity along with their potential application in wound dressings. Glucuronoxylan (GX) isolated from seeds of Mimosa pudica (MP) was used as a stabilizing/capping agent to prepare the NPs under diffused sunlight using different concentrations of AgNO3. The progress of the reaction was monitored using a UV-visible spectrophotometer and characteristic surface plasmon absorption (SPR) bands were found in the range of 390–465 nm. The morphology and elemental composition of the synthesized Ag NPs were analyzed using scanning electron microscopy equipped with STEM and EDS detectors and the diameter of the Ag NPs was found to be in the range of 2 to 18 nm. The synthesized NPs exhibited antimicrobial potential against Staphylococcus epidermidis, Escherichia coli, Pseudomonas aeruginosa, Bacillus subtilis, Staphylococcus aureus, Aspergillus niger, Penicillium notatum, Rhizopus stolonifer and Actinomycetes odontolyticus. The minimal inhibitory concentrations (MICs) of the Ag NPs against different pathogenic strains were determined. Moreover, the dressing prepared from Ag NP impregnated GX exhibited a remarkable wound healing potential in rabbits. In situ synthesized Ag NPs were stored in the form of GX thin films and their UV/vis spectra exhibited that the texture of the Ag NPs remained intact after a six month storage period.
机译：水凝胶形成多糖在具有潜在生物学应用的多种天然银纳米颗粒（Ag NPs）设计中引起了人们的注意。在本文中，我们报告了Ag NP的绿色合成及其抗菌活性及其在伤口敷料中的潜在应用。分离自含羞草（MP）种子的葡糖醛酸木聚糖（GX）作为稳定剂/封端剂，使用不同浓度的AgNO 3 。使用紫外可见分光光度计监测反应进程，发现特征表面等离子体吸收（SPR）谱带在390–465 nm范围内。使用配备了STEM和EDS检测器的扫描电子显微镜分析了合成的Ag NP的形态和元素组成，发现Ag NP的直径在2至18 nm的范围内。合成的NPs具有抗表皮葡萄球菌，大肠杆菌，铜绿假单胞菌，枯草芽孢杆菌，的抗菌潜能。金黄色葡萄球菌，黑曲霉， Penicillium notatum ， Rhizopus stolonifer 和放线放线菌。确定了Ag NP对不同病原菌株的最小抑制浓度（MIC）。此外，由Ag NP浸渍的GX制备的敷料在兔中显示出显着的伤口愈合潜力。原位合成的Ag NPs以GX薄膜的形式存储，其UV / vis光谱显示，经过6个月的存储，Ag NPs的质地仍然完好无损。

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