Technological innovations in packaging are intended to prevent microbiological contaminations for ensuring food safety and preservation. In this context, researchers have investigated the antimicrobial effect of low-density polyethylene films incorporated with the following concentrations of silver nanoparticles: 1.50, 3.75, 7.50, 15.00, 30.00, 60.00, and 75.00 µg/ml. The films were characterized using field emission gun scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetry, and differential scanning calorimetry. From the results of these techniques, it could be concluded that the silver nanoparticles incorporated in the low-density polyethylene films did not influence their physical, chemical, and thermal properties. The direct contact assays, shake-flask assays, and bacterial images obtained using scanning electron microscopy were used to analyze the antimicrobial activity of the films. In the microbial analyses, it was verified that the nanostructured films exhibited antimicrobial properties against all the microorganisms studied, although more notably for fungi and Gram-negative bacteria than the Gram-positive bacteria. Moreover, it was discovered that the packages, in which silver nanoparticles were incorporated, inhibited the growth and reproduction of bacterial cells during the early stages. These results suggest that the extruded low-density polyethylene films incorporated with silver nanoparticles may be an essential tool for improving food quality and safety.

中文翻译：

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掺入银纳米粒子的低密度聚乙烯薄膜可提高食品包装中的抗菌效率

包装技术创新旨在防止微生物污染，以确保食品安全和保存。在此背景下，研究人员研究了掺入以下银纳米粒子浓度的低密度聚乙烯薄膜的抗菌效果：1.50、3.75、7.50、15.00、30.00、60.00 和 75.00 µg/ml。使用场发射枪扫描电子显微镜、傅里叶变换红外光谱、X 射线衍射、热重法和差示扫描量热法对薄膜进行表征。从这些技术的结果可以得出结论，掺入低密度聚乙烯薄膜中的银纳米颗粒不会影响它们的物理、化学和热性能。直接接触测定、摇瓶测定、使用扫描电子显微镜获得的细菌图像用于分析薄膜的抗菌活性。在微生物分析中，证实纳米结构薄膜对所有研究的微生物都表现出抗菌特性，尽管对真菌和革兰氏阴性菌的影响比对革兰氏阳性菌更显着。此外，发现其中掺入了银纳米颗粒的包装在早期抑制了细菌细胞的生长和繁殖。这些结果表明，掺入银纳米颗粒的挤出低密度聚乙烯薄膜可能是提高食品质量和安全性的重要工具。经证实，纳米结构薄膜对所有研究的微生物都表现出抗菌特性，尽管对真菌和革兰氏阴性菌的抗菌性能比革兰氏阳性菌更显着。此外，发现其中掺入了银纳米颗粒的包装在早期抑制了细菌细胞的生长和繁殖。这些结果表明，掺入银纳米颗粒的挤出低密度聚乙烯薄膜可能是提高食品质量和安全性的重要工具。经证实，纳米结构薄膜对所有研究的微生物都表现出抗菌特性，尽管对真菌和革兰氏阴性菌的抗菌性能比革兰氏阳性菌更显着。此外，发现其中掺入了银纳米颗粒的包装在早期抑制了细菌细胞的生长和繁殖。这些结果表明，掺入银纳米颗粒的挤出低密度聚乙烯薄膜可能是提高食品质量和安全性的重要工具。在早期抑制细菌细胞的生长和繁殖。这些结果表明，掺入银纳米颗粒的挤出低密度聚乙烯薄膜可能是提高食品质量和安全性的重要工具。在早期抑制细菌细胞的生长和繁殖。这些结果表明，掺入银纳米颗粒的挤出低密度聚乙烯薄膜可能是提高食品质量和安全性的重要工具。