scholarly journals Homogeneous Supported Monolayer from Microbial Glycolipid Biosurfactant

2021 ◽  
pp. 117827
Author(s):  
Niki Baccile ◽  
Anyssa Derj ◽  
Cédric Boissière ◽  
Vincent Humblot ◽  
Ariane Deniset-Besseau
2020 ◽  
Vol 82 (10) ◽  
pp. 2134-2147
Author(s):  
Somayeh Kazemzadeh ◽  
Nafiseh Sadat Naghavi ◽  
Zarrindokht Emami-Karvani ◽  
Giti Emtiazi ◽  
Masoud Fouladgar

Abstract This study aimed to find biosurfactant producing and crude oil-degrading bacteria able to decontaminate crude oil from wastewater. The bacteria that were isolated from contaminated sites in an oil refinery plant in Isfahan, Iran, were identified by 16S rDNA sequencing as Achromobacter kerstersii strain LMG3441, Klebsiella pneumonia strain SKBA6, and Klebsiella variicola strain SKV2. According to the results obtained from different tests for the production of biosurfactant among three strains, only Achromobacter kerstersii strain LMG3441 was selected for further study. The pattern of residual hydrocarbons was analyzed by high-resolution gas chromatography-mass spectrometry (GC-MS). This novel and indigenous strain was capable of producing the highest amount of a glycolipid biosurfactant (7.81 g/L) in MSM (mineral salt medium) with 1% (v/v) crude oil as the only source of carbon and energy. The compound showed high surface activation capacity with reduction of surface tension from 40 mN m–1 in the control to 23.3 mN m–1 by the bacterium. The results of GC-MS for assessment of residual hydrocarbons in the MSM and comparison with crude oil as a control showed that 53% of the hydrocarbons in the crude oil were consumed by this novel strain.


2000 ◽  
Vol 18 (2) ◽  
pp. 171-176 ◽  
Author(s):  
A. Shulga ◽  
E. Karpenko ◽  
R. Vildanova-Martsishin ◽  
A. Turovsky ◽  
M. Soltys

The development of new efficient cleaning technologies for the bioremediation of the environment and its cleaning from oil products has become a subject of great interest. Surfactants influence the bioremediation of oil and other organic contaminants through increasing their availability. Since surfactant products of a microbial nature are highly efficient in this respect, they have important advantages over synthetic materials. Being biodegradable, they are ecologically safe. A new washing bioremedy based on surfactant products synthesized microbially from the bacterial strain Pseudomonas sp. PS-17 has been obtained. It contains an unique biocomplex of a glycolipid biosurfactant and an alginate biopolymer and possesses a high surface and emulsifying activity. The washing and antisorptional capacity of this bioremedy has been tested on objects of various natures, viz. bird feathers, animal skins and furs. We have obtained positive results in the remediation of sea sands, birds and animals suffering from ecological catastrophy. It was shown that the bioremedy has mild properties and does not change the structure of the feathers, skins and furs studied. The bioremedy remains active over the temperature range 15–90°C.


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