Results 91 to 100 of about 4,335 (132)

Residual biomass from surfactin production is a source of arginase and adsorbed surfactin that is useful for environmental remediation

World Journal of Microbiology and Biotechnology, 2021
Lipopeptides are important secondary metabolites produced by microbes. They find applications in environmental decontamination and in the chemical, pharmaceutical and food industries. However, their production is expensive. In the present work we propose three strategies to lower the production costs of surfactin.
Thais de Carvalho Silveira, Wyllerson Evaristo Gomes, Giovana Chinaglia Tonon, Thainá Godoy Beatto, Nicolas Spogis, Luiz Henrique Dallan Cunha, Bruno Pera Lattaro, Alessandra Borin Nogueira, Renata Kelly Mendes, Danillo Oliveira Alvarenga, Augusto Etchegaray   +10 more
openaire   +3 more sources

Synthesis of Aza-Surfactin and 3-Epi-Aza-Surfactin

HETEROCYCLES, 2012
Two synthetic approaches to aza surfactins are reported. In the first our recently developed synthesis of unnatural ß3 amino acids was used to prepare the requisite monomer which was used in solid phase peptide synthesis and followed by macrolactamization of a partially protected precursor. In the second the corresponding ß3 N hydroxyaminoacid was used
Jeffrey W. Bode, Yi-Lin Huang, M. Elisa Juarez-Garcia, Raphael Frey   +3 more
openaire   +1 more source

Recent trends in the biochemistry of surfactin

Applied Microbiology and Biotechnology, 1999
The name surfactin refers to a bacterial cyclic lipopeptide, primarily renowned for its exceptional surfactant power since it lowers the surface tension of water from 72 mN m-1 to 27 mN m-1 at a concentration as low as 20 microM. Although surfactin was discovered about 30 years ago, there has been a revival of interest in this compound over the past ...
Peypoux, F, Bonmatin, J, Wallach, J.
openaire   +3 more sources

Interfacial properties of surfactin

Journal of Colloid and Interface Science, 1992
Abstract Surfactin is a lipopeptide produced by various strains of Bacillus subtilis and is a very powerful surfactant. Here we present the first report on the interfacial behavior of surfactin. The adsorption, Γmax, of surfactin at the interface of diluted solutions (5 × 10−8 to 5 × 10−7M) is around 3 × 1018 molecule m−2, a value indicating that ...
Régine Maget-Dana, Marius Ptak
openaire   +1 more source

Hydrolysis of surfactin over activated carbon

Bioorganic Chemistry, 2019
Surfactin is obtained through biocatalysis by microorganisms. In our biorefinery concept, it is purified on activated carbon (AC) during downstream processing. Besides cyclic surfactin, it is possible to obtain linear surfactin analogues, when AC with specific properties is used.
Hanna, Fałtynowicz, Paweł, Hodurek, Jan, Kaczmarczyk, Marek, Kułażyński, Marcin, Łukaszewicz   +4 more
openaire   +3 more sources

Surfactin at the Water/Air Interface and in Solution

Langmuir, 2015
The lipopeptide surfactin produced by certain strains of Bacillus subtillis is a potent biosurfactant with high amphiphilicity and a strong tendency for self-aggregation. Surfactin possesses a number of valuable biological properties such as antiviral, antibacterial, antifungal, and hemolytic activities.
Iglesias-Fernández, Javier, Darre Castell, Leonardo, Kohlmeyer, Axel, Thomas, Robert K., Shen, Hsin Hui, Domene, Carmen   +5 more
openaire   +3 more sources

Interaction of the Biosurfactant, Surfactin with Betaines in Aqueous Solution

Langmuir, 2013
The interactions between the lipopeptide Surfactin and four betaines, N-dodecyl-N,N-dimethyl-3-ammonio-1-propanesulfonate (SDDAB), N-tetradecyl-N,N-dimethyl-3-ammonio-1-propanesulfonate (STDAB), N-hexadecyl-N,N-dimethyl-3-ammonio-1-propanesulfonate (SHDAB), and N-dodecyl-N,N-dimethyl-2-ammonio-acetate (C12BE) are studied by surface tension and small ...
Fang, Liu, Jingwen, Xiao, Vasil M, Garamus, László, Almásy, Regine, Willumeit, Bozhong, Mu, Aihua, Zou   +6 more
openaire   +2 more sources

Surfactin variants for intra-intestinal delivery of insulin

European Journal of Pharmaceutics and Biopharmaceutics, 2017
Surfactin is a Bacillus-produced natural lipopeptide, which can overcome the epithelial cell barriers for orally delivering insulin, but its ability to promote uptake of insulin by the intestine need to be further improved for a higher oral bioavailability.
Li, Zhang, Xiaoying, Xing, Jia, Ding, Xiuyun, Zhao, Gaofu, Qi   +4 more
openaire   +2 more sources

Surfactin Activity Depends on the Membrane Dipole Potential

Langmuir, 2010
The effect of dipole modifying agents phloretin and RH 421 on the membrane conductance induced by surfactin, a lipopeptide antibiotic from Bacillus subtilis, was studied. Surfactin added on both sides of a bilayer formed from diphytanoylphosphocholine in 1 M KCl (pH 6.5) leads to the formation of voltage-independent channels of different conductance ...
Olga S, Ostroumova, Valery V, Malev, Maxim G, Ilin, Ludmila V, Schagina   +3 more
openaire   +2 more sources

Toxicity and applications of surfactin for health and environmental biotechnology

Journal of Toxicology and Environmental Health, Part B, 2018
Characterized as one of the most potent biosurfactants, surfactin is a cyclic lipopeptide synthesized by several strains of Bacillus genus. The aim of this review was to present the physicochemical and structural properties of surfactin and to demonstrate advances and applications of this biosurfactant for health and environmental biotechnology ...
Vanessa Santana Vieira, Santos, Edgar, Silveira, Boscolli Barbosa, Pereira   +2 more
openaire   +2 more sources