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dc.contributor.authorDIAS, M. A. M.
dc.contributor.authorROSSINI, E. L.
dc.contributor.authorBRITTO, D. de
dc.contributor.authorNITSCHKE, M.
dc.date.accessioned2025-09-02T17:50:34Z-
dc.date.available2025-09-02T17:50:34Z-
dc.date.created2025-09-02
dc.date.issued2024
dc.identifier.citationFermentation, v. 11, n. 8, 471, 2025.
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1178465-
dc.descriptionBiosurfactants (BS) are surface-active compounds synthesized by microorganisms with broad industrial applications. Although BS-producing strains are widely reported, little is known about their production by diazotrophic bacteria. This study investigated, for the first time, the BS produced by Bradyrhizobium sp. ESA 81, a diazotrophic bacterium isolated from the Brazilian semiarid region. The strain was cultivated in the mineral medium using sunflower oil and ammonium nitrate as carbon and nitrogen sources. The compound was chemically characterized using TLC, FAME, FTIR, and mass spectrometry (MALDI-TOF). The results revealed a mixture of glycolipids composed of trehalose linked to fatty acid chains ranging from C9 to C18. The BS exhibited a surface tension of 31.8 mN/m, a critical micelle concentration of 61.2 mg/L, and an interfacial tension of 22.1 mN/m. The BS also showed an emulsification index (EI24) of 55.0%. High stability was observed under extreme conditions of temperature (−20 to 121 °C), pH (2–12), NaCl (5–20%), and sucrose (1–5%). These findings indicate that the trehalolipid BS produced by Bradyrhizobium sp. ESA 81 is a stable and efficient surface-active agent, with promising potential for use in biotechnological and industrial processes.
dc.language.isoeng
dc.rightsopenAccess
dc.subjectBiossurfactante
dc.subjectTrehalolipídio
dc.subjectRizóbio
dc.subjectBactéria diazotrófica
dc.subjectÓleo de girassol
dc.subjectBiotensoativos BS
dc.subjectBioinseticida
dc.titleProduction and characterization of a novel glycolipid biosurfactant from Bradyrhizobium sp.
dc.typeArtigo de periódico
dc.subject.thesagroBactéria
dc.subject.nalthesaurusBradyrhizobium
dc.subject.nalthesaurusBiosurfactants
riaa.ainfo.id1178465
riaa.ainfo.lastupdate2025-09-02
dc.identifier.doihttps://doi.org/10.3390/fermentation11080471
dc.contributor.institutionMARCOS ANDRÉ MOURA DIAS, UNIVERSITY OF SÃO PAULO; EDUARDO LUIZ ROSSINI, UNIVERSITY OF SÃO PAULO; DOUGLAS DE BRITTO, CPATSA; MARCIA NITSCHKE, UNIVERSITY OF SÃO PAULO.
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