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Spin coater

Company: Laurell Technologies Corporation
Catalog#: WS-650-23B
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Determination of Antibacterial Activity of Film Coatings against Four Clinically Relevant Bacterial Strains
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2021-01-20
[Abstract]  

Antibacterial coatings have currently gained great importance in biomedical technology investigations. Because of the spatial arrangement of the film coatings, evaluation of antibacterial activity presents a new challenge regarding traditional bacterial counting methods. In this protocol, four clinically relevant pathogens, Salmonella typhimurium, Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus were incubated on titania mesostructured thin film coatings for 24 h. Then, cell viability was studied considering three methods: counting of the number of colony forming units (CFU), live/dead staining, and quantification of extracellular DNA in suspension. Firstly, bacterial count was determined by the standard plate-count technique. Secondly, bacteria membrane integrity was

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[摘要]  [摘要]抗菌涂料目前在生物医学技术研究中具有重要意义。由于薄膜包衣的空间排列,抗菌活性的评估对传统的细菌计数方法提出了新的挑战。在此协议中,将四种临床相关病原体,鼠伤寒沙门氏菌,大肠杆菌,铜绿假单胞菌和金黄色葡萄球菌在二氧化钛介孔薄膜涂层上孵育24小时。然后,考虑三种方法研究细胞生存力:计数菌落形成单位(CFU)的数量,活/死染色以及悬浮液中细胞外DNA的定量。首先,通过标准的盘数技术确定细菌数。其次,通过利用两种荧光染料评估细菌膜的完​​整性,这两种荧光染料可以区分活细菌(完整的膜)和死细菌(破膜的)。最后,通过分光光度法定量细胞外DNA 。以这种方式,上述三种技术使得能够通过定性和定量分析研究细菌的生存力。

[背景]功能性涂料,由于他们提供的材料工程领域的宝贵优势被广泛研究。它们能够引入新的表面特性,而不会改变材料的体积特性。在它们的功能中,抗菌涂层对于生物医学应用已显示出极大的重要性(Mateescu等人,2015)。从这个意义上讲,纳米技术提供了制造抗菌涂层的重要工具。我们的小组已经实现了具有广谱杀菌活性的纳米结构涂层的合成,而没有利用抗生素或排斥细菌的物质(Scilletta et al。,2019)。在这里,只有个êSUP ...

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