Log in

Relevant bibliographies by topics / Rhamnolipds / Journal articles

To see the other types of publications on this topic, follow the link: Rhamnolipds.

Journal articles on the topic 'Rhamnolipds'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Rhamnolipds.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Li, Zhuangzhuang, Yumin Zhang, Junzhang Lin, Weidong Wang, and Shuang Li. "High-Yield Di-Rhamnolipid Production by Pseudomonas aeruginosa YM4 and its Potential Application in MEOR." Molecules 24, no. 7 (2019): 1433. http://dx.doi.org/10.3390/molecules24071433.

Full text

Abstract:

Rhamnolipids are a mixture of the homologs species due to variations in the rhamnose units and β-hydroxy fatty acid moieties, mainly including Rha-C10-C10, Rha-Rha-C10-C10, and Rha-C10. In this study, strain P. aeruginosa YM4 was selected for its capacity to efficiently produce di-rhamnolipid (Rha-Rha-C10-C10) as the predominant component with soybean oil and glycerol as carbon source, accounting for 64.8% and 85.7% of total products, respectively. The critical micelle concentration (CMC) of rhamnolipid products varies with the content of di-rhamnolipid, whereby lower CMC values corresponding

APA, Harvard, Vancouver, ISO, and other styles

2

Mendoza, Ayana Rose, Jenny Marie Patalinghug, Grace Canonigo, and Jonie Yee. "SCREENING OF RHAMNOLIPIDS FROM Pseudomonas spp. AND EVALUATION OF ITS ANTIMICROBIAL AND ANTIOXIDANT POTENTIAL." Bacterial Empire 3, no. 3 (2020): 46–51. http://dx.doi.org/10.36547/be.2020.3.3.46-51.

Full text

Abstract:

Biosurfactants are amphipathic compounds that are useful in industries and are also used in bioremediation. Rhamnolipids (RL) are biosurfactant mostly produced by the genus Pseudomonas. This study screened 6 strains of Pseudomonas isolated from underwater cave sediments to determine if they were capable of producing rhamnolipids. The biosurfactant production of potential strains was screened by Parafilm-M Test, Oil spreading technique, Microplate assay, Emulsification Index, CTAB Agar plate method, Anthrone test, and Thin Layered Chromatography. The study showed that only 3 strains had the pot

APA, Harvard, Vancouver, ISO, and other styles

3

Gunther, Nereus W., Alberto Nuñez, William Fett, and Daniel K. Y. Solaiman. "Production of Rhamnolipids by Pseudomonas chlororaphis, a Nonpathogenic Bacterium." Applied and Environmental Microbiology 71, no. 5 (2005): 2288–93. http://dx.doi.org/10.1128/aem.71.5.2288-2293.2005.

Full text

Abstract:

ABSTRACT Rhamnolipids, naturally occurring biosurfactants constructed of rhamnose sugar molecules and β-hydroxyalkanoic acids, have a wide range of potential commercial applications. In the course of a survey of 33 different bacterial isolates, we have identified, using a phenotypic assay for rhamnolipid production, a strain of the nonpathogenic bacterial species Pseudomonas chlororaphis that is capable of producing rhamnolipids. Rhamnolipid production by P. chlororaphis was achieved by growth at room temperature in static cultures of a mineral salts medium containing 2% glucose. We obtained y

APA, Harvard, Vancouver, ISO, and other styles

4

Syldatk, C., S. Lang, U. Matulovic, and F. Wagner. "Production of Four Interfacial Active Rhamnolipids from n-Alkanes or Glycerol by Resting Cells of Pseudomonas species DSM 2874." Zeitschrift für Naturforschung C 40, no. 1-2 (1985): 61–67. http://dx.doi.org/10.1515/znc-1985-1-213.

Full text

Abstract:

In a simple phosphate buffer or a sodium chloride solution resting cells of Pseudomonas spec. DSM 2874 produced up to 15 g/l of different rhamnolipids. The rhamnolipid composition of the organic crude extract depended on the temperature during the cultivation and on the C-source. The optimal sodium chloride concentration for rhamnolipid formation was about 100 mᴍ/l and the optimal phosphate buffer concentration about 65 mᴍ/l. The optimal pH-value for the production of rhamnolipids from n-alkanes or glycerol was in the range pH 6.0-7.2. While rhamnolipid formation with glycerol as the sole C-so

APA, Harvard, Vancouver, ISO, and other styles

5

Shreve, Gina S., and Ronald Makula. "Characterization of a New Rhamnolipid Biosurfactant Complex from Pseudomonas Isolate DYNA270." Biomolecules 9, no. 12 (2019): 885. http://dx.doi.org/10.3390/biom9120885.

Full text

Abstract:

The chemical and physical properties of extracellular rhamnolipid synthesized by a nonfluorescent Pseudomonas species soil isolate, identified as DYNA270, is described, along with characteristics of rhamnolipid production under varying growth conditions and substrates. The biosurfactant is determined to be an anionic, extracellular glycolipid consisting of two major components, the rhamnopyranoside β-1-3-hydroxydecanoyl-3-hydroxydecanoic acid (GU-6) and rhamnopyranosyl β→β2-rhamnopyranoside-β1-3-hydroxydecanoyl-3-hydroxydecanoic acid (GL-2), of molecular weight 504 and 649 daltons, respectivel

APA, Harvard, Vancouver, ISO, and other styles

6

Rikalovic, Milena, Miroslav Vrvic, and Ivanka Karadzic. "Rhamnolipid biosurfactant from Pseudomonas aeruginosa: From discovery to application in contemporary technology." Journal of the Serbian Chemical Society 80, no. 3 (2015): 279–304. http://dx.doi.org/10.2298/jsc140627096r.

Full text

Abstract:

The rhamnolipids are most likely the next generation of biosurfactants which will reach the market. They should follow closely after alkyl polyglycosides, already established in the biosurfactants market, and sophorolipids, which can be found in several cleaning agents. However, the greatest number of recent publications and patents among glycolipid biosurfactants has been dedicated to rhamnolipids. Produced mainly by Pseudomonas aeruginosa, rhamnolipids are mixtures of different rhamnolipid congeners, which show physico-chemical properties that differ from those of single congeners, with the

APA, Harvard, Vancouver, ISO, and other styles

7

Rikalovic, Milena, Gordana Gojgic-Cvijovic, Miroslav Vrvic, and Ivanka Karadzic. "Production and characterization of rhamnolipids from Pseudomonas aeruginosa san ai." Journal of the Serbian Chemical Society 77, no. 1 (2012): 27–42. http://dx.doi.org/10.2298/jsc110211156r.

Full text

Abstract:

Production and characterization of rhamnolipid biosurfactant obtained by strain Pseudomonas aeruginosa san ai was investigated. With regard to carbon and nitrogen source several media were tested to enhance production of rhamnolipids. Phosphate-limited proteose peptone-ammonium salt (PPAS) medium supplemented with sun flower oil as a source of carbon and mineral ammonium chloride and peptone as a nitrogen source greatly improved rhamnolipid production, from 0.15 on basic PPAS (C/N ratio 4.0), to 3 g L-1, on optimized PPAS medium (C/N ratio 7.7). Response surface methodology analysis was used f

APA, Harvard, Vancouver, ISO, and other styles

8

Wilhelm, Susanne, Aneta Gdynia, Petra Tielen, Frank Rosenau, and Karl-Erich Jaeger. "The Autotransporter Esterase EstA of Pseudomonas aeruginosa Is Required for Rhamnolipid Production, Cell Motility, and Biofilm Formation." Journal of Bacteriology 189, no. 18 (2007): 6695–703. http://dx.doi.org/10.1128/jb.00023-07.

Full text

Abstract:

ABSTRACT Pseudomonas aeruginosa PAO1 produces the biodetergent rhamnolipid and secretes it into the extracellular environment. The role of rhamnolipids in the life cycle and pathogenicity of P. aeruginosa has not been completely understood, but they are known to affect outer membrane composition, cell motility, and biofilm formation. This report is focused on the influence of the outer membrane-bound esterase EstA of P. aeruginosa PAO1 on rhamnolipid production. EstA is an autotransporter protein which exposes its catalytically active esterase domain on the cell surface. Here we report that th

APA, Harvard, Vancouver, ISO, and other styles

9

Caiazza, Nicky C., Robert M. Q. Shanks, and G. A. O'Toole. "Rhamnolipids Modulate Swarming Motility Patterns of Pseudomonas aeruginosa." Journal of Bacteriology 187, no. 21 (2005): 7351–61. http://dx.doi.org/10.1128/jb.187.21.7351-7361.2005.

Full text

Abstract:

ABSTRACT Pseudomonas aeruginosa is capable of twitching, swimming, and swarming motility. The latter form of translocation occurs on semisolid surfaces, requires functional flagella and biosurfactant production, and results in complex motility patterns. From the point of inoculation, bacteria migrate as defined groups, referred to as tendrils, moving in a coordinated manner capable of sensing and responding to other groups of cells. We were able to show that P. aeruginosa produces extracellular factors capable of modulating tendril movement, and genetic analysis revealed that modulation of the

APA, Harvard, Vancouver, ISO, and other styles

10

Eswari, Jujjavarapu S. "Production of Rhamnolipid Biosurfactant from Fed Batch Culture by Pseudomonas aeruginosa using Multiple Substrates." Current Nutrition & Food Science 16, no. 6 (2020): 928–33. http://dx.doi.org/10.2174/1573401314666181107100127.

Full text

Abstract:

Objective: Biosurfactants are the surface active agents which are used for the reduction of surface and interfacial tensions of liquids. Rhamnolipids are the surfactants produced by Pseudomonas aeruginosa. It requires minimum nutrition for its growth as it can also grow in distilled water. The rhamnolipids produced by Pseudomonas aeruginosa are extra-cellular glycolipids consisting of L-rhamnose and 3-hydroxyalkanoic acid. Methods: The fed-batch method for the rhamnolipid production is considered in this study to know the influence of the carbon, nitrogen, phosphorous substrates as growth-limi

APA, Harvard, Vancouver, ISO, and other styles

11

Ghazaei, Ciamak. "Effect of Rhamnolipids on Pathogenicity Characteristics of Microorganisms in Organic Compost." Research in Molecular Medicine 9, no. 1 (2021): 39–50. http://dx.doi.org/10.32598/rmm.9.1.5.

Full text

Abstract:

Background: Rhamnolipids are hydrophilic glycolipids, often classified as biosurfactants. They are produced by different bacterial species. Rhamnolipids are extensively studied in biological research because of their interesting features like antimicrobial, antifungal, and antiviral activities. Materials and Methods: To study the antimicrobial effect of rhamnolipid, we conducted a crosssectional study on the eight different pathogenic bacterial strains from November 2019 to June 2020. These bacterial strains were isolated from the organic compost. Both disk diffusion and broth microdilution me

APA, Harvard, Vancouver, ISO, and other styles

12

Soares dos Santos, Alexandre, Nei Pereira Jr, and Denise M. G. Freire. "Strategies for improved rhamnolipid production byPseudomonas aeruginosaPA1." PeerJ 4 (May 24, 2016): e2078. http://dx.doi.org/10.7717/peerj.2078.

Full text

Abstract:

Rhamnolipids are biosurfactants with potential for diversified industrial and environmental uses. The present study evaluated three strategies for increasing the production of rhamnolipid-type biosurfactants produced byPseudomonas aeruginosastrain PA1. The influence of pH, the addition ofP. aeruginosaspent culture medium and the use of a fed-batch process were examined. The culture medium adjusted to pH 7.0 was the most productive. Furthermore, the pH of the culture medium had a measurable effect on the ratio of synthesized mono- and dirhamnolipids. At pH values below 7.3, the proportion of mo

APA, Harvard, Vancouver, ISO, and other styles

13

Dyke, M. I. Van, P. Couture, M. Brauer, H. Lee, and J. T. Trevors. "Pseudomonas aeruginosa UG2 rhamnolipid biosurfactants: structural characterization and their use in removing hydrophobic compounds from soil." Canadian Journal of Microbiology 39, no. 11 (1993): 1071–78. http://dx.doi.org/10.1139/m93-162.

Full text

Abstract:

The structure of two rhamnolipid biosurfactants produced by Pseudomonas aeruginosa UG2 was studied. Analyses by gas chromatography - mass spectrometry and nuclear magnetic resonance spectroscopy showed these two rhamnolipids to be α-L-rhamnopyranosyl-β-hydroxydecanoyl-β-hydroxydecanoate and 2-O-α-L-rhamnopyranosyl-α-L-rhamnopyranosyl-β-hydroxydecanoyl-β-hydroxydecanoate. The ability of UG2 rhamnolipid biosurfactants to enhance removal of naphthalene, anthracene, phenanthrene, fluorene, 2,2′,5,5′-tetrachlorobiphenyl, and 3,3′,4,4′,5,5′-hexachlorobiphenyl into the aqueous phase was affected by s

APA, Harvard, Vancouver, ISO, and other styles

14

Christova, Nelly, Boryana Tuleva, Rashel Cohen, et al. "Chemical Characterization and Physical and Biological Activities of Rhamnolipids Produced by Pseudomonas aeruginosa BN10." Zeitschrift für Naturforschung C 66, no. 7-8 (2011): 394–402. http://dx.doi.org/10.1515/znc-2011-7-811.

Full text

Abstract:

Pseudomonas aeruginosa BN10 isolated from hydrocarbon-polluted soil was found to produce rhamnolipids when cultivated on 2% glycerol, glucose, n-hexadecane, and n-alkanes. The rhamnolipids were partially purified on silica gel columns and their chemical structures elucidated by combination of one- and two-dimensional 1H and 13C NMR techniques and ESI-MS analysis. Eight structural rhamnolipid homologues were identified: Rha-C10- C8, Rha-C10-C10, Rha-C10-C12:1, Rha-C10-C12, Rha2-C10-C8, Rha2-C10-C10, Rha2-C10-C12:1, and Rha2-C10-C12. The chemical composition of the rhamnolipid mixtures produced

APA, Harvard, Vancouver, ISO, and other styles

15

Carrazco-Palafox, Jair, Blanca Estela Rivera-Chavira, Jaime Raúl Adame-Gallegos, Luz María Rodríguez-Valdez, Erasmo Orrantia-Borunda, and Guadalupe Virginia Nevárez-Moorillón. "Rhamnolipids from Pseudomonas aeruginosa Rn19a Modifies the Biofilm Formation over a Borosilicate Surface by Clinical Isolates." Coatings 11, no. 2 (2021): 136. http://dx.doi.org/10.3390/coatings11020136.

Full text

Abstract:

Microbial cells are reversibly associated with surfaces in the form of biofilms. Adhesion is the mechanism used by the microorganisms to bind to a surface initially; no biofilm is formed without the initial adhesion. The aim of this work was to evaluate the efficacy of the rhamnolipids of Pseudomonas aeruginosa Rn19a in inhibiting the biofilms formed by the clinical isolates Escherichia coli I5, Pseudomonas aeruginosa E26, Enterococcus faecalis I27 on borosilicate coupons inside a Center for Disease Control and Prevention (CDC) reactor. The isolate E26 (P. aeruginosa) did not show an adverse e

APA, Harvard, Vancouver, ISO, and other styles

16

Nickzad, Arvin, Claude Guertin, and Eric Déziel. "Culture Medium Optimization for Production of Rhamnolipids by Burkholderia glumae." Colloids and Interfaces 2, no. 4 (2018): 49. http://dx.doi.org/10.3390/colloids2040049.

Full text

Abstract:

Burkholderia glumae is a biosafety level 1 bacterium capable of producing rhamnolipid biosurfactant with longer 3-hydroxy fatty acid chains moieties than those produced by the prototypal producer, the opportunistic pathogen Pseudomonas aeruginosa. Although the capacity of production of rhamnolipid, and the parameters affecting this production, are well established for P. aeruginosa, little is known about the factors that may affect their production in B. glumae. Hence, to evaluate and enhance the production of rhamnolipids in B. glumae, following the selection of best carbon and nitrogen sourc

APA, Harvard, Vancouver, ISO, and other styles

17

Yu, Hua, Xiaomei He, Wei Xie, et al. "Elastase LasB of Pseudomonas aeruginosa promotes biofilm formation partly through rhamnolipid-mediated regulation." Canadian Journal of Microbiology 60, no. 4 (2014): 227–35. http://dx.doi.org/10.1139/cjm-2013-0667.

Full text

Abstract:

Elastase LasB, an important extracellular virulence factor, is shown to play an important role in the pathogenicity of Pseudomonas aeruginosa during host infection. However, the role of LasB in the life cycle of P. aeruginosa is not completely understood. This report focuses on the impact of LasB on biofilm formation of P. aeruginosa PAO1. Here, we reported that the lasB deletion mutant (ΔlasB) displayed significantly decreased bacterial attachment, microcolony formation, and extracellular matrix linkage in biofilm associated with decreased biosynthesis of rhamnolipids compared with PAO1 and l

APA, Harvard, Vancouver, ISO, and other styles

18

Wang, Shiwei, Shan Yu, Zhenyin Zhang, et al. "Coordination of Swarming Motility, Biosurfactant Synthesis, and Biofilm Matrix Exopolysaccharide Production in Pseudomonas aeruginosa." Applied and Environmental Microbiology 80, no. 21 (2014): 6724–32. http://dx.doi.org/10.1128/aem.01237-14.

Full text

Abstract:

ABSTRACTBiofilm formation is a complex process in which many factors are involved. Bacterial swarming motility and exopolysaccharides both contribute to biofilm formation, yet it is unclear how bacteria coordinate swarming motility and exopolysaccharide production. Psl and Pel are two key biofilm matrix exopolysaccharides inPseudomonas aeruginosa. This opportunistic pathogen has three types of motility, swimming, twitching, and swarming. In this study, we found that elevated Psl and/or Pel production reduced the swarming motility ofP. aeruginosabut had little effect on swimming and twitching.

APA, Harvard, Vancouver, ISO, and other styles

19

Czaplicka, Natalia, Szymon Mania, and Donata Konopacka-Łyskawa. "Influence of Rhamnolipids and Ionic Cross-Linking Conditions on the Mechanical Properties of Alginate Hydrogels as a Model Bacterial Biofilm." International Journal of Molecular Sciences 22, no. 13 (2021): 6840. http://dx.doi.org/10.3390/ijms22136840.

Full text

Abstract:

The literature indicates the existence of a relationship between rhamnolipids and bacterial biofilm, as well as the ability of selected bacteria to produce rhamnolipids and alginate. However, the influence of biosurfactant molecules on the mechanical properties of biofilms are still not fully understood. The aim of this research is to determine the effect of rhamnolipids concentration, CaCl2 concentration, and ionic cross-linking time on the mechanical properties of alginate hydrogels using a Box–Behnken design. The mechanical properties of cross-linked alginate hydrogels were characterized us

APA, Harvard, Vancouver, ISO, and other styles

20

Déziel, Eric, François Lépine, Sylvain Milot, and Richard Villemur. "rhlA is required for the production of a novel biosurfactant promoting swarming motility in Pseudomonas aeruginosa: 3-(3-hydroxyalkanoyloxy)alkanoic acids (HAAs), the precursors of rhamnolipids." Microbiology 149, no. 8 (2003): 2005–13. http://dx.doi.org/10.1099/mic.0.26154-0.

Full text

Abstract:

Pseudomonas aeruginosa produces extracellular glycolipids composed of l-rhamnose and 3-hydroxyalkanoic acid called rhamnolipids. Although these compounds are usually regarded as biosurfactants or haemolysins, their exact physiological function is not well understood. Rhamnolipids are synthesized by a rhamnosyltransferase, encoded by the rhlAB operon, which catalyses the transfer of TDP-l-rhamnose to 3-(3-hydroxyalkanoyloxy)alkanoic acid (HAA) moieties of various lengths. RhlB is the catalytic protein of the rhamnosyltransferase. rhlA is indispensable for rhamnolipid synthesis, but its function

APA, Harvard, Vancouver, ISO, and other styles

21

Zhang, Lin, Tracey A. Veres-Schalnat, Arpad Somogyi, Jeanne E. Pemberton та Raina M. Maier. "Fatty Acid Cosubstrates Provide β-Oxidation Precursors for Rhamnolipid Biosynthesis in Pseudomonas aeruginosa, as Evidenced by Isotope Tracing and Gene Expression Assays". Applied and Environmental Microbiology 78, № 24 (2012): 8611–22. http://dx.doi.org/10.1128/aem.02111-12.

Full text

Abstract:

ABSTRACTRhamnolipids have multiple potential applications as “green” surfactants for industry, remediation, and medicine. As a result, they have been intensively investigated to add to our understanding of their biosynthesis and improve yields. Several studies have noted that the addition of a fatty acid cosubstrate increases rhamnolipid yields, but a metabolic explanation has not been offered, partly because biosynthesis studies to date have used sugar or sugar derivatives as the carbon source. The objective of this study was to investigate the role of fatty acid cosubstrates in improving rha

APA, Harvard, Vancouver, ISO, and other styles

22

Sha, Ruyi, Zhan Yu, Zhenzhen Wang, et al. "Effects of Rhamnolipids on Enzymatic Hydrolysis of Bamboo Biomass and Mechanism." Journal of Biobased Materials and Bioenergy 14, no. 4 (2020): 453–60. http://dx.doi.org/10.1166/jbmb.2020.1985.

Full text

Abstract:

The lignin present in lignocellulose seriously affects the efficiency of cellulose enzymatic hydrolysis. In addition, lignin adsorbs high-cost cellulase, causing greater economic losses. Lignin can also disturb the site of action of cellulase and reduce the efficiency of hydrolysis. Therefore, if lignin is removed or surface modified before cellulose enzymatic hydrolysis, the enzymatic hydrolysis efficiency of lignocellulosic biomass will be greatly improved. In this paper, the cellulose enzymatic properties of bamboo biomass being treated with dilute acid and alkaline under the intervention o

APA, Harvard, Vancouver, ISO, and other styles

23

Chebbi, Alif, Massimiliano Tazzari, Cristiana Rizzi, et al. "Burkholderia thailandensis E264 as a promising safe rhamnolipids’ producer towards a sustainable valorization of grape marcs and olive mill pomace." Applied Microbiology and Biotechnology 105, no. 9 (2021): 3825–42. http://dx.doi.org/10.1007/s00253-021-11292-0.

Full text

Abstract:

Abstract Within the circular economy framework, our study aims to assess the rhamnolipid production from winery and olive oil residues as low-cost carbon sources by nonpathogenic strains. After evaluating various agricultural residues from those two sectors, Burkholderia thailandensis E264 was found to use the raw soluble fraction of nonfermented (white) grape marcs (NF), as the sole carbon and energy source, and simultaneously, reducing the surface tension to around 35 mN/m. Interestingly, this strain showed a rhamnolipid production up to 1070 mg/L (13.37 mg/g of NF), with a higher purity, on

APA, Harvard, Vancouver, ISO, and other styles

24

Rehm, Bernd H. A., Timothy A. Mitsky, and Alexander SteinbÃ¯Â¿Â½chel. "Role of Fatty Acid De Novo Biosynthesis in Polyhydroxyalkanoic Acid (PHA) and Rhamnolipid Synthesis by Pseudomonads: Establishment of the Transacylase (PhaG)-Mediated Pathway for PHA Biosynthesis inEscherichia coli." Applied and Environmental Microbiology 67, no. 7 (2001): 3102–9. http://dx.doi.org/10.1128/aem.67.7.3102-3109.2001.

Full text

Abstract:

ABSTRACT Since Pseudomonas aeruginosa is capable of biosynthesis of polyhydroxyalkanoic acid (PHA) and rhamnolipids, which contain lipid moieties that are derived from fatty acid biosynthesis, we investigated various fab mutants from P. aeruginosa with respect to biosynthesis of PHAs and rhamnolipids. All isogenicfabA, fabB, fabI, rhlG, and phaG mutants fromP. aeruginosa showed decreased PHA accumulation and rhamnolipid production. In the phaG (encoding transacylase) mutant rhamnolipid production was only slightly decreased. Expression of phaG from Pseudomonas putida and expression of the β-ke

APA, Harvard, Vancouver, ISO, and other styles

25

Fauzi, Andrea Gilang, Cut Nanda Sari, Andre Fahriz Perdana Harahap, Muhammad Yusuf Arya Ramadhan, and Misri Gozan. "Process Simulation and Economic Analysis of Rhamnolipid Production by Pseudomonas aeruginosa Using Oil Palm Empty Fruit Bunch as Substrate." Advances in Science and Technology 104 (February 2021): 103–12. http://dx.doi.org/10.4028/www.scientific.net/ast.104.103.

Full text

Abstract:

Surfactants are amphiphilic molecules that have been used in widely used as emulsifier and cleaning agent in various industries. These broad industrial applications made the global surfactant production increased annually. In 2020, the amount of global surfactant production estimated would reach more than 24 million per year. However, the currently used surfactants are synthetically produced from chemical or petroleum-derived products, so it is often toxic and non-biodegradable. Rhamnolipids are “surfactant like” molecules produced by Pseudomonas aeruginosa, which could be alternatives for mor

APA, Harvard, Vancouver, ISO, and other styles

26

Vujović, Bojana, Smilja Teodorović, Željka Rudić, Mile Božić, and Vera Raičević. "Phenotypic heterogeneity of Pseudomonas aeruginosa isolates in the protected nature park ‘Palić’ (Serbia)." Water Supply 16, no. 5 (2016): 1370–77. http://dx.doi.org/10.2166/ws.2016.061.

Full text

Abstract:

Pseudomonas aeruginosa is a globally distributed environmental bacterium, which is also a significant opportunistic pathogen of humans, animals and plants. It is considered that wide distribution of this bacterium is connected with its most significant constitutive property to form biofilms, and that this multicellular mode of growth, predominant in nature, serves as a protective mechanism against unfavourable environmental conditions. The work presented here examines the phenotypic diversity of Pseudomonas aeruginosa environmental isolates with respect to biofilm production capacity under dif

APA, Harvard, Vancouver, ISO, and other styles

27

Ugwu, Elijah Chibuzo, Bhaskar Sen Gupta, Adeloye Adebayo, and Nadia Martínez-Villegas. "Column Experiment for the Removal of Cadmium, Copper, Lead and Zinc from Artificially Contaminated Soil using EDTA, Rhamnolipids, and Soapnut." European Journal of Environment and Earth Sciences 2, no. 2 (2021): 1–7. http://dx.doi.org/10.24018/ejgeo.2021.2.2.63.

Full text

Abstract:

Environmental contamination caused by high contents of toxic metals in the soil is a global concern. Soil washing using chelating agents and saponin can enhance metal removal from contaminated soils through the formation of soluble metal complexes, mobilization, and extraction with the washing solutions. Column experiments were conducted in this study to assess the feasibility of using a chelate (EDTA), a saponin (soapnut) and microbial (rhamnolipid) cleaning agents to enhance the removal of Cd, Cu, Pb and Zn from sandy loam contaminated soils. The cumulative removal of Cd after 10 pore volume

APA, Harvard, Vancouver, ISO, and other styles

28

Christova, Nelly, Petar Petrov, and Lyudmila Kabaivanova. "Biosurfactant Production by Pseudomonas aeruginosa BN10 Cells Entrapped in Cryogels." Zeitschrift für Naturforschung C 68, no. 1-2 (2013): 47–52. http://dx.doi.org/10.1515/znc-2013-1-207.

Full text

Abstract:

Production of a rhamnolipid biosurfactant by cells of Pseudomonas aeruginosa strain BN10 immobilized into poly(ethylene oxide) (PEO) and polyacrylamide (PAAm) cryogels was investigated under semicontinuous shake fl ask conditions and compared to biosurfactant secretion by free cells. The biosurfactant synthesis was followed over 9 cycles of operation of the immobilized system, each cycle comprising 7 days at ambient temperature and neutral pH. Type and quantity of the carrier were optimized for the rhamnolipid production. The highest rhamnolipid yield of 4.6 g l-1 was obtained in the 6th cycle

APA, Harvard, Vancouver, ISO, and other styles

29

Zulianello, Laurence, Coralie Canard, Thilo Köhler, Dorothée Caille, Jean-Silvain Lacroix, and Paolo Meda. "Rhamnolipids Are Virulence Factors That Promote Early Infiltration of Primary Human Airway Epithelia by Pseudomonas aeruginosa." Infection and Immunity 74, no. 6 (2006): 3134–47. http://dx.doi.org/10.1128/iai.01772-05.

Full text

Abstract:

ABSTRACT The opportunistic bacterium Pseudomonas aeruginosa causes chronic respiratory infections in cystic fibrosis and immunocompromised individuals. Bacterial adherence to the basolateral domain of the host cells and internalization are thought to participate in P. aeruginosa pathogenicity. However, the mechanism by which the pathogen initially modulates the paracellular permeability of polarized respiratory epithelia remains to be understood. To investigate this mechanism, we have searched for virulence factors secreted by P. aeruginosa that affect the structure of human airway epithelium

APA, Harvard, Vancouver, ISO, and other styles

30

Askitosari, Theresia D., Carola Berger, Till Tiso, Falk Harnisch, Lars M. Blank, and Miriam A. Rosenbaum. "Coupling an Electroactive Pseudomonas putida KT2440 with Bioelectrochemical Rhamnolipid Production." Microorganisms 8, no. 12 (2020): 1959. http://dx.doi.org/10.3390/microorganisms8121959.

Full text

Abstract:

Sufficient supply of oxygen is a major bottleneck in industrial biotechnological synthesis. One example is the heterologous production of rhamnolipids using Pseudomonas putida KT2440. Typically, the synthesis is accompanied by strong foam formation in the reactor vessel hampering the process. It is caused by the extensive bubbling needed to sustain the high respirative oxygen demand in the presence of the produced surfactants. One way to reduce the oxygen requirement is to enable the cells to use the anode of a bioelectrochemical system (BES) as an alternative sink for their metabolically deri

APA, Harvard, Vancouver, ISO, and other styles

31

Eraqi, Walaa A., Aymen S. Yassin, Amal E. Ali, and Magdy A. Amin. "Utilization of Crude Glycerol as a Substrate for the Production of Rhamnolipid by Pseudomonas aeruginosa." Biotechnology Research International 2016 (January 28, 2016): 1–9. http://dx.doi.org/10.1155/2016/3464509.

Full text

Abstract:

Biosurfactants are produced by bacteria or yeast utilizing different substrates as sugars, glycerol, or oils. They have important applications in the detergent, oil, and pharmaceutical industries. Glycerol is the product of biodiesel industry and the existing glycerol market cannot accommodate the excess amounts generated; consequently, new markets for refined glycerol need to be developed. The aim of present work is to optimize the production of microbial rhamnolipid using waste glycerol. We have developed a process for the production of rhamnolipid biosurfactants using glycerol as the sole c

APA, Harvard, Vancouver, ISO, and other styles

32

Mishra, Alok K., Rikesh K. Dubey, Shivraj M. Yabaji, and Swati Jaiswal. "Evaluation of antimycobacterial rhamnolipid production from non-cytotoxic strains of Pseudomonas aeruginosa isolated from rhizospheric soil of medicinal plants." International Journal of Biological Research 4, no. 2 (2016): 112. http://dx.doi.org/10.14419/ijbr.v4i2.6429.

Full text

Abstract:

Rhamnolipids (RLs) are the bacterial derived biosurfactants and known for a wide range of industrial and therapeutic applications. They exhibit potent anti-bacterial activity against various gram positive, gram negative and acid fast bacteria including Mycobacterium tuberculosis. Since, Pseudomonas is one of the largest known genuses containing a variety of rhamnolipid producing strains. Therefore, in this study, we selectively isolated the Pseudomonas aeruginosa strains from the rhizospheric soil of the Indian plants of medicinal value, e.g. Azadirachta Indica and Ficus spp., and evaluated th

APA, Harvard, Vancouver, ISO, and other styles

33

Polish, N. V., N. G. Marintsova, A. I. Karkhut, O. S. Yaremkevysh, and O. V. Karpenko. "Antioxidant activity of heterocyclic amino containing derivatives of naphthoquinone and their compositions with surface-active rhamnolipids." Chemistry, Technology and Application of Substances 4, no. 1 (2021): 109–15. http://dx.doi.org/10.23939/ctas2021.01.109.

Full text

Abstract:

Composite preparations based on heterocyclic amine-containing naphthoquinone derivatives and surfactant rhamnolipids were obtained. The intensity of the processes of lipid peroxidation (LPO), oxidative modification of proteins (OMB) and radical-absorbing activity against 1,1-diphenyl-2-picrylhydrazyl (DFPG) was studied. Compounds exhibiting high antioxidant activity against LPO and OMB processes were identified, namely: 2-[(6-(4-fluorophenyl-5-oxo-2,5-dihydro-1,2,4-triazin-3-yl) phenyl)amino]naphthalene-1,4-dione 1d and its composite preparation with rhamnolipid 1d + RL. It was found that all

APA, Harvard, Vancouver, ISO, and other styles

34

Campos-García, Jesús, Alma Delia Caro, Rebeca Nájera, Raina M. Miller-Maier, Ragheb A. Al-Tahhan та Gloria Soberón-Chávez. "The Pseudomonas aeruginosa rhlG Gene Encodes an NADPH-Dependent β-Ketoacyl Reductase Which Is Specifically Involved in Rhamnolipid Synthesis". Journal of Bacteriology 180, № 17 (1998): 4442–51. http://dx.doi.org/10.1128/jb.180.17.4442-4451.1998.

Full text

Abstract:

ABSTRACT A Pseudomonas aeruginosa gene homologous to thefabG gene, which encodes the NADPH-dependent β-ketoacyl-acyl carrier protein (ACP) reductase required for fatty acid synthesis, was identified. The insertional mutation of thisfabG homolog (herein called rhlG) produced no apparent effect on the growth rate and total lipid content of P. aeruginosa cells, but the production of rhamnolipids was completely abrogated. These results suggest that the synthetic pathway for the fatty acid moiety of rhamnolipids is separate from the general fatty acid synthetic pathway, starting with a specific ket

APA, Harvard, Vancouver, ISO, and other styles

35

Guo, Yan Ping, та Hui Lin. "Biodegradation of 17α-Ethinylestradiol in Sediment/Water Systems Affected by Two Different Rhamnolipidic Homologues". Advanced Materials Research 955-959 (червень 2014): 7–15. http://dx.doi.org/10.4028/www.scientific.net/amr.955-959.7.

Full text

Abstract:

The shake flask aerobic biodegradation experiment was used to study the effect on biodegradation of 17α-ethinylestradiol (EE2) in the sediment/water system affected by mono-rhamnolipid (RL-F1) and di-rhamnolipid (RL-F2). The results showed that RL-F1 and RL-F2 had no inhibitory effect on EE2 biodegradation. The effect of RL-F1 on enhanced biodegradation of EE2 was larger than that of RL-F2. In 6 mM and 10 mM of the rhamnolipidic functioned systems, EE2 biotransformation rates affected by RL-F1 were respectively 7.6 and 8.2 times of those of RL-F2 corresponding systems. The accumulation and cha

APA, Harvard, Vancouver, ISO, and other styles

36

Vaillancourt, Mylene, Sam P. Limsuwannarot, Catherine Bresee, Rahgavi Poopalarajah, and Peter Jorth. "Pseudomonas aeruginosa mexR and mexEF Antibiotic Efflux Pump Variants Exhibit Increased Virulence." Antibiotics 10, no. 10 (2021): 1164. http://dx.doi.org/10.3390/antibiotics10101164.

Full text

Abstract:

Antibiotic-resistant Pseudomonas aeruginosa infections are the primary cause of mortality in people with cystic fibrosis (CF). Yet, it has only recently become appreciated that resistance mutations can also increase P. aeruginosa virulence, even in the absence of antibiotics. Moreover, the mechanisms by which resistance mutations increase virulence are poorly understood. In this study we tested the hypothesis that mutations affecting efflux pumps can directly increase P. aeruginosa virulence. Using genetics, physiological assays, and model infections, we show that efflux pump mutations can inc

APA, Harvard, Vancouver, ISO, and other styles

37

Henkel, Marius, Markus M. Müller, Johannes H. Kügler, et al. "Rhamnolipids as biosurfactants from renewable resources: Concepts for next-generation rhamnolipid production." Process Biochemistry 47, no. 8 (2012): 1207–19. http://dx.doi.org/10.1016/j.procbio.2012.04.018.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Al-Tahhan, Ragheb A., Todd R. Sandrin, Adria A. Bodour, and Raina M. Maier. "Rhamnolipid-Induced Removal of Lipopolysaccharide from Pseudomonas aeruginosa: Effect on Cell Surface Properties and Interaction with Hydrophobic Substrates." Applied and Environmental Microbiology 66, no. 8 (2000): 3262–68. http://dx.doi.org/10.1128/aem.66.8.3262-3268.2000.

Full text

Abstract:

ABSTRACT Little is known about the interaction of biosurfactants with bacterial cells. Recent work in the area of biodegradation suggests that there are two mechanisms by which biosurfactants enhance the biodegradation of slightly soluble organic compounds. First, biosurfactants can solubilize hydrophobic compounds within micelle structures, effectively increasing the apparent aqueous solubility of the organic compound and its availability for uptake by a cell. Second, biosurfactants can cause the cell surface to become more hydrophobic, thereby increasing the association of the cell with the

APA, Harvard, Vancouver, ISO, and other styles

39

Tuleva, Borjana, Nelly Christova, Bojidar Jordanov, Boryana Nikolova-Damyanova, and Petar Petrov. "Naphthalene Degradation and Biosurfactant Activity by Bacillus cereus 28BN." Zeitschrift für Naturforschung C 60, no. 7-8 (2005): 577–82. http://dx.doi.org/10.1515/znc-2005-7-811.

Full text

Abstract:

Biosurfactant activity and naphthalene degradation by a new strain identified as Bacillus cereus 28BN were studied. The strain grew well and produced effective biosurfactants in the presence of n-alkanes, naphthalene, crude oil and vegetable oils. The biosurfactants were detected by the surface tension lowering of the medium, thin layer chromatography and infrared spectra analysis. With (2%) naphthalene as the sole carbon source, high levels of rhamnolipids at a concentration of 2.3 g l-1 were determined in the stationary growth. After 20 d of incubation 72 ± 4% of the initial naphthalene was

APA, Harvard, Vancouver, ISO, and other styles

40

Davey, Mary E., Nicky C. Caiazza, and George A. O'Toole. "Rhamnolipid Surfactant Production Affects Biofilm Architecture in Pseudomonas aeruginosa PAO1." Journal of Bacteriology 185, no. 3 (2003): 1027–36. http://dx.doi.org/10.1128/jb.185.3.1027-1036.2003.

Full text

Abstract:

ABSTRACT In response to certain environmental signals, bacteria will differentiate from an independent free-living mode of growth and take up an interdependent surface-attached existence. These surface-attached microbial communities are known as biofilms. In flowing systems where nutrients are available, biofilms can develop into elaborate three-dimensional structures. The development of biofilm architecture, particularly the spatial arrangement of colonies within the matrix and the open areas surrounding the colonies, is thought to be fundamental to the function of these complex communities.

APA, Harvard, Vancouver, ISO, and other styles

41

KARPENKO, Іlоna, Galyna MIDYANA, Olena KARPENKO, Igor SEMENIUK, Stepan MIDYANYY, and Olena PAL’CHIKOVA. "APPLICATION OF EXTRACTION METHOD FOR ISOLATION OF BIOGENIC SURFACE-ACTIVE RHAMNOLIPIDS." Proceedings of the Shevchenko Scientific Society. Series Сhemical Sciences 2020, no. 60 (2020): 7–13. http://dx.doi.org/10.37827/ntsh.chem.2020.60.007.

Full text

Abstract:

The priority task of modern biotechnology is development of the rational technologies for the microbial synthesis of practically important products. Among these products, a significant place belongs to surfactants (biosurfactants), which are widely used in many sectors of the economy. The most problematic stage of the biosurfactants production is isolation from the post fermentative cultural liquid of bacteria-producers. Improving the efficiency of the biosurfactants production is highly dependent on rational approaches to the target products isolation. In this regard, there is an increasing n

APA, Harvard, Vancouver, ISO, and other styles

42

Allegrone, Gianna, Chiara Ceresa, Maurizio Rinaldi, and Letizia Fracchia. "Diverse Effects of Natural and Synthetic Surfactants on the Inhibition of Staphylococcus aureus Biofilm." Pharmaceutics 13, no. 8 (2021): 1172. http://dx.doi.org/10.3390/pharmaceutics13081172.

Full text

Abstract:

A major challenge in the biomedical field is the creation of materials and coating strategies that effectively limit the onset of biofilm-associated infections on medical devices. Biosurfactants are well known and appreciated for their antimicrobial/anti-adhesive/anti-biofilm properties, low toxicity, and biocompatibility. In this study, the rhamnolipid produced by Pseudomonas aeruginosa 89 (R89BS) was characterized by HPLC-MS/MS and its ability to modify cell surface hydrophobicity and membrane permeability as well as its antimicrobial, anti-adhesive, and anti-biofilm activity against Staphyl

APA, Harvard, Vancouver, ISO, and other styles

43

Naspolini, Bianca Ferrazzo, Antonio Carlos de Oliveira Machado, Walter Barreiro Cravo Junior, Denise Maria Guimarães Freire, and Magali Christe Cammarota. "Bioconversion of Sugarcane Vinasse into High-Added Value Products and Energy." BioMed Research International 2017 (2017): 1–11. http://dx.doi.org/10.1155/2017/8986165.

Full text

Abstract:

Vinasse, a residue from bioethanol production containing high organic matter concentration, was used as substrate in submerged fermentation ofPseudomonas aeruginosaPA1 for biosurfactant production. About 2.7 g/L of rhamnolipids was obtained, with surface tension of 29.2 mN/m and critical micelle concentration of 80.3 mg/L. After separation of rhamnolipid and biomass, residual fermentation media were submitted to anaerobic biodegradation in mesophilic conditions. The residual medium derived from fermentation with vinasse diluted to 1 : 1, without addition of nitrogen, C : N 21, and for 168 h, l

APA, Harvard, Vancouver, ISO, and other styles

44

Köhler, Thilo, Jean-Luc Dumas, and Christian Van Delden. "Ribosome Protection Prevents Azithromycin-Mediated Quorum-Sensing Modulation and Stationary-Phase Killing of Pseudomonas aeruginosa." Antimicrobial Agents and Chemotherapy 51, no. 12 (2007): 4243–48. http://dx.doi.org/10.1128/aac.00613-07.

Full text

Abstract:

ABSTRACT In Pseudomonas aeruginosa, azithromycin has been shown to reduce virulence factor production, to retard biofilm formation, and to exhibit bactericidal effects on stationary-phase cells. In this study we analyzed whether these azithromycin-mediated effects require interaction with the ribosome. We blocked the access of azithromycin to the ribosome in P. aeruginosa PAO1 by expressing the 23S rRNA methylase ErmBP from Clostridium perfringens. Ribosome protection prevented the azithromycin-mediated reduction of elastase and rhamnolipid production, as well as the inhibition of swarming mot

APA, Harvard, Vancouver, ISO, and other styles

45

Zheng, Hewen, Nischal Singh, Gauri S. Shetye, Yucheng Jin, Diana Li, and Yan-Yeung Luk. "Synthetic analogs of rhamnolipids modulate structured biofilms formed by rhamnolipid-nonproducing mutant of Pseudomonas aeruginosa." Bioorganic & Medicinal Chemistry 25, no. 6 (2017): 1830–38. http://dx.doi.org/10.1016/j.bmc.2017.01.042.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Woźniak-Karczewska, Marta, Kamila Myszka, Agata Sznajdrowska, et al. "Isolation of rhamnolipids-producing cultures from faeces: Influence of interspecies communication on the yield of rhamnolipid congeners." New Biotechnology 36 (May 2017): 17–25. http://dx.doi.org/10.1016/j.nbt.2016.12.008.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Sohail, Rafeya, and Nazia Jamil. "Isolation of biosurfactant producing bacteria from Potwar oil fields: Effect of non-fossil fuel based carbon sources." Green Processing and Synthesis 9, no. 1 (2019): 77–86. http://dx.doi.org/10.1515/gps-2020-0009.

Full text

Abstract:

AbstractBiosurfactants are surface-active metabolites produced by microorganisms. Biosurfactants tend to solubilize hydrocarbons in the surrounding environment, by reducing surface tension and increasing carbon uptake. In this study, isolation of biosurfactant producing bacteria and effect of renewable, non-fossil fuel based carbon sources on production were assessed. Oil field produced water was collected from Potwar oil fields and thirteen strains were isolated. Strains were screened for biosurfactant production by hemolysis test, emulsification index test, emulsification assay, oil displace

APA, Harvard, Vancouver, ISO, and other styles

48

Bakkar, Marwa Reda, Ahmed Hassan Ibrahim Faraag, Elham R. S. Soliman, et al. "Rhamnolipids Nano-Micelles as a Potential Hand Sanitizer." Antibiotics 10, no. 7 (2021): 751. http://dx.doi.org/10.3390/antibiotics10070751.

Full text

Abstract:

COVID-19 is a pandemic disease caused by the SARS-CoV-2, which continues to cause global health and economic problems since emerging in China in late 2019. Until now, there are no standard antiviral treatments. Thus, several strategies were adopted to minimize virus transmission, such as social distancing, face covering protection and hand hygiene. Rhamnolipids are glycolipids produced formally by Pseudomonas aeruginosa and as biosurfactants, they were shown to have broad antimicrobial activity. In this study, we investigated the antimicrobial activity of rhamnolipids against selected multidru

APA, Harvard, Vancouver, ISO, and other styles

49

Thomidis, Thomas, Ioanna Prodromou та Argyrios Farmakis. "Rhamnolipids: The Next Generation Multifunctional Biomolecules for Applications Against Μeloidogyne incognita in Tomato Plants". Journal of Agricultural Science 13, № 9 (2021): 93. http://dx.doi.org/10.5539/jas.v13n9p93.

Full text

Abstract:

Plant parasitic nematodes are a global threat to tomato production due to severe damages they cause to roots. The main aim of this study was to investigate the effect of rhamnolipids to control the nematode Meloidogyne incognitain tomato plants. It was applied as soil drench in soil naturally infested with the nematodes. The results showed that the number of small size galls was statistically less in the plants treated with fluopyram than untreated control or rhamnolipids. Plants treated with rhamnolipids had significantly less number of small size galls than untreated control. The number of m

APA, Harvard, Vancouver, ISO, and other styles

50

Liu, Jianfei, Yuru Wang, and Huifang Li. "Synergistic Solubilization of Phenanthrene by Mixed Micelles Composed of Biosurfactants and a Conventional Non-Ionic Surfactant." Molecules 25, no. 18 (2020): 4327. http://dx.doi.org/10.3390/molecules25184327.

Full text

Abstract:

This study investigated the solubilization capabilities of rhamnolipids biosurfactant and synthetic surfactant mixtures for the application of a mixed surfactant in surfactant-enhanced remediation. The mass ratios between Triton X-100 and rhamnolipids were set at 1:0, 9:1, 3:1, 1:1, 1:3, and 0:1. The ideal critical micelle concentration values of the Triton X-100/rhamnolipids mixture system were higher than that of the theoretical predicted value suggesting the existence of interactions between the two surfactants. Solubilization capabilities were quantified in term of weight solubilization ra

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!