Results 181 to 190 of about 6,671 (207)
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Interaction of the Biosurfactant, Surfactin with Betaines in Aqueous Solution
Langmuir, 2013The 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 +6 more
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Surfactin variants for intra-intestinal delivery of insulin
European Journal of Pharmaceutics and Biopharmaceutics, 2017Surfactin 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 +4 more
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Surfactin Activity Depends on the Membrane Dipole Potential
Langmuir, 2010The 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 +3 more
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Toxicity and applications of surfactin for health and environmental biotechnology
Journal of Toxicology and Environmental Health, Part B, 2018Characterized 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 +2 more
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Characterization of the surfactin synthetase multi-enzyme complex
Biochimica et Biophysica Acta (BBA) - Protein Structure and Molecular Enzymology, 1994Three subunits (srfAORF1, srfAORF2 and srfAORF3) of the Bacillus subtilis surfactin synthetase multi-enzyme complex have been identified by SDS-PAGE and Western blot analyses. In accordance with the sequence analysis of the surfactin (srfA) operon, the protein subunits have a molecular mass of 402,000 Da, 401,000 Da and 144,000 Da, respectively ...
G, Galli +6 more
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Controlled biosynthesis of Val7- and Leu7-surfactins
Applied Microbiology and Biotechnology, 1992Surfactin was found to consist of a mixture of two groups of homologous lipopeptides differing by their peptide sequence; Val7-surfactin was recently characterized as a minor companion of the previously described Leu7-surfactin. The addition of various α-amino acids to the culture media led to variations in the production ratios of the two congeners ...
Fran�oise Peypoux, Georges Michel
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Surfactin: Biosynthesis, Genetics and Potential Applications
2010Even after forty years of its discovery by Arima et al, surfactin, a potent lipopeptide biosurfactant, still attracts attention and fancy of the applied microbiologists and biotechnologists worldwide, mainly due to its versatile bioactive properties and potential industrial implications.
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Surfactin and Other Lipopeptides from Bacillus spp.
2010Isolated during 1950s and 1960s, the group of lipopeptides from Bacillus spp. gather more than 30 different peptides linked to various fatty acid chains. More than a 100 different compounds can so be described. In this chapter, they are classified into four main families: the surfactins, the iturins, the fengycins or plipastatins and the kurstakins ...
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Wei sheng wu xue bao = Acta microbiologica Sinica, 2009
Strains producing biological surfactants were isolated from formation water of Daqing oil field, Heilongjiang Province, China. From which a lipopeptide producing strain ZW-3 was screened out by PCR of the sfp gene. The morphology, cultural characteristics, physiological, biochemical properties and chemotaxonomy of strain ZW-3 were studied.
Dawei, Wang +4 more
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Strains producing biological surfactants were isolated from formation water of Daqing oil field, Heilongjiang Province, China. From which a lipopeptide producing strain ZW-3 was screened out by PCR of the sfp gene. The morphology, cultural characteristics, physiological, biochemical properties and chemotaxonomy of strain ZW-3 were studied.
Dawei, Wang +4 more
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MICELLAR CHARACTERISTICS OF THE BIOLOGICAL SURFACTANT - SURFACTIN
Herald of Technological UniversityBiological surfactants produced by bacteria and living organisms are used in the food, agricultural, pharmaceutical and medical, cosmetic, oil and gas industries, for soil remediation, and purification of industrial wastewater. They are highly biodegradable, low toxic, low cost, and are a "green" alternative to synthetic surfactants. The paper presents
V.P. ARKHIPOV, N.A. KUZINA, YA.V. IVSHIN
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