Silver has been mainly investigated as an antibacterial agent and less as a fungicide in which concerns antimicrobial properties. In this research, the antifungal activity of composite films of pullulan and Ag nanoparticles (NP) against Aspergillus niger was evaluated using standard protocols. These new materials were prepared as transparent cast films (66-74 μm thickness) from Ag hydrosols containing the polysaccharide. Fungal growth inhibition was observed in the presence of such silver nanocomposite films. Moreover, disruption of the spores cells of A. niger was probed for the first time by means of scanning electron microscopy (SEM). This effect occurred in the presence of the nanocomposites due to Ag NP dispersed as fillers in pullulan. This polysaccharide was used here as a biocompatible matrix, hence making these nanocomposites beneficial for the development of antifungal packaging materials.

译文

主要研究银作为抗菌剂,而较少作为涉及抗菌特性的杀菌剂。在这项研究中,使用标准方案评估了支链淀粉和Ag纳米颗粒 (NP) 复合膜对黑曲霉的抗真菌活性。这些新材料是由含有多糖的Ag水溶胶制成的透明流延膜 (厚度为66-74μm)。在这种银纳米复合膜的存在下观察到真菌生长抑制。此外,首次通过扫描电子显微镜 (SEM) 探测了黑曲霉孢子细胞的破坏。由于Ag NP作为填料分散在支链淀粉中,因此在纳米复合材料的存在下发生了这种效果。该多糖在此用作生物相容性基质,因此使这些纳米复合材料有利于开发抗真菌包装材料。

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