A group of four selected non‐ionic surfactants based on carbohydrates, namely octyl d‐xyloside (C₈X), nonyl d‐xyloside (C₉X), decyl d‐xyloside (C₁₀X) and dodecyl d‐xyloside (C₁₂X), have been investigated to accomplish a better understanding of their physico‐chemical properties as well as biological activities. The surface‐active properties, such as critical micelle concentration (CMC), emulsion and foam stability, the impact of the compounds on cell surface hydrophobicity and cell membrane permeability together with their toxicity on the selected bacterial strains have been determined as well. The studied group of surfactants showed high surface‐active properties allowing a decrease in the surface tension to values below 25 mN m⁻¹ for dodecyl d‐xyloside at the CMC. The investigated compounds did not have any toxic influence on two Pseudomonas bacterial strains at concentrations below 25 mg L⁻¹. The studied long‐chain alkyl xylosides influenced both the cell inner membrane permeability and the cell surface hydrophobicity. Furthermore, the alkyl chain length, as well as the surfactant concentration, had a significant impact on the modifications of the cell surface properties. The tested non‐ionic surfactants exhibited strong surface‐active properties accompanied by the significant influence on growth and properties of Pseudomonas bacteria cells.

中文翻译：

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烷基木糖苷：理化性质及其对环境细菌细胞的影响。


一组四种选定的基于碳水化合物的非离子表面活性剂，即辛基d-木糖苷（C ₈ X）、壬基d-木糖苷（C ₉ X）、癸基d-木糖苷（C ₁₀ X）和十二烷基d-木糖苷（C ₁₂ X），已被研究以更好地了解其物理化学特性以及生物活性。还确定了表面活性特性，例如临界胶束浓度（CMC）、乳液和泡沫稳定性、化合物对细胞表面疏水性和细胞膜渗透性的影响以及它们对选定细菌菌株的毒性。研究的表面活性剂组表现出高表面活性特性，使得十二烷基d -木糖苷在 CMC 处的表面张力降低至 25 mN m ^-1以下。所研究的化合物在浓度低于25 mg L ^-1时对两种假单胞菌菌株没有任何毒性影响。研究的长链烷基木糖苷影响细胞内膜渗透性和细胞表面疏水性。此外，烷基链长度以及表面活性剂浓度对细胞表面性质的改变具有显着影响。测试的非离子表面活性剂表现出很强的表面活性，并对假单胞菌细胞的生长和特性产生显着影响。