Production and characterization of surface-active compounds from Gordonia amicalis

Brazilian Archives of Biology and Technology

Ani Beatriz Jackisch-matsuura²  Leonardo Silva Santos¹  Marcos Nogueira Eberlin¹  Andréia Fonseca De Faria¹  Takeshi Matsuura¹  Matthew James Grossman¹  Lucia Regina Durrant¹ 

[1],Fiocruz Amazônia Centro de Pesquisa Leônidas e Maria Deane Manaus AM ,Brasil

关键词: Bioemulsifier;    bioremediation;    biosurfactant;    Gordonia amicalis;    industrial chemicals;    microbial surfactant production;   

DOI  :  10.1590/S1516-89132014000100019

来源: SciELO

【 摘 要 】

Two methods were used to make crude preparations of surface-active compounds (SACs) produced by Gordonia amicalis grown on the medium containing 1% diesel oil. Using a 2:1 (v/v) solution of chloroform:methanol for extraction, Type I SACs were isolated and shown to produce oil in water (O/W) emulsions. Type II SACs were isolated by precipitation with ammonium sulfate and produced predominantly water in oil emulsions (W/O). The crude Type I and II preparations were able to produce a significant reduction in the surface tension of water; however, the crude Type II preparation had 10-25 fold higher emulsification activity than the Type I preparation. Both SAC preparations were analyzed by the TLC and each produced two distinct bands with Rf 0.44 and 0.62 and Rf 0.52 and 0.62, respectively. The partially purified SACs were characterized by the ESI(+)-MS, FT-IR and NMR. In each one of these fractions, a mixture of 10 oligomers was found consisting of a series of compounds, with masses from 502 to 899, differing in molecular mass by a repeating unit of 44 Daltons. The mass spectra of these compounds did not appear to match other known biosurfactants and could represent a novel class of these compounds.

【 授权许可】

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