2026-07-11T03:12:07Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/80522024-09-16T22:42:07Zcom_10259_4244com_10259_5086com_10259_2604com_10259_5827col_10259_4245col_10259_5828

00925njm 22002777a 4500 dc Ammar, Ameni Ben author Bouassida, Mouna author Bouallegue, Amir author Fourati, Nada author Gerardi, Gisela author Muñiz Rodríguez, Pilar author Benito Moreno, José Manuel author Ghribi, Dhouha author 2023-11 Microbial surfactants are natural amphiphilic compounds with high surface activities and emulsifying properties. Due to their structural diversity, low toxicity, biodegradability, and chemical stability in different conditions, these molecules are potential substitutes for chemical surfactants; their interest has grown significantly over the last decade. The current study focuses on the isolation, identification, and characterization of a lactic acid bacteria that produce two forms of biosurfactants. The OL5 strain was isolated from green olive fermentation and identified using MALDI/TOF and DNAr16S amplification. Emulsification activity and surface tension measurements were used to estimate biosurfactant production. The two biosurfactants derived from Lactiplantibacillus plantarum OL5 presented good emulsification powers in the presence of various oils. They were also shown to have the potential to reduce water surface tension from 69 mN/m to 34 mN/m and 37 mN/m within a critical micelle concentration (CMC) of 7 mg/ml and 1.8 mg/ml, respectively, for cell bound and extracellular biosurfactants. Thin layer chromatography (TLC) and FT-IR were used to analyze the composition of the two biosurfactants produced. the obtained data revealed that the two biomolecules consist of a mixture of carbohydrates, lipids and proteins. We demonstrated that they are two anionic biosurfactants with glycolipopeptide nature which are stable in extreme conditions of temperature, pH and salinity. 0959-3993 http://hdl.handle.net/10259/8052 10.1007/s11274-023-03744-8 1573-0972 Lactobacillus Biosurfactants FTIR analysis Glycolipopeptide Isolation and characterization of two glycolipopeptids biosurfactants produced by a Lactiplantibacillus plantarum OL5 strain isolated from green olive curing water