Consulta: subjectFacets:"EPS"
Registros recuperados: 11
Data/hora: 07/06/2024 08:31:46

The exopolysaccharides biosynthesis by Candida yeast depends on carbon sources
Provedor de dados: 69
Autores: Gientka,Iwona; Bzducha-Wróbel,Anna; Stasiak-Rózañska,Lidia; Agnieszka Bednarska,Aleksandra; Blazejak,Stanislaw.
Background: The exopolysaccharides (EPS) produced by yeast exhibit physico-chemical and rheological properties, which are useful in the production of food and in the cosmetic and pharmaceutical industries as well. The effect was investigated of selected carbon sources on the biosynthesis of EPS by Candida famata and Candida guilliermondii strains originally isolated from kefirs. Results: The biomass yields were dependent on carbon source (sucrose, maltose, lactose, glycerol, sorbitol) and ranged from 4.13 to 7.15 g/L. The highest biomass yield was reported for C. guilliermondii after cultivation on maltose. The maximum specific productivity of EPS during cultivation on maltose was 0.505 and 0.321 for C. guilliermondii and C. famata, respectively. The...
Tipo: Journal article
Palavras-chave: Candida; Exopolysaccharides biosynthesis; EPS; Maltose.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582016000400005

Manejo "EPS" da água de irrigação de pastagens.
Provedor de dados: 14
Autores: RASSINI, J. B.
bitstream/item/110420/1/IRRIGACAO.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: EPS; Irrigação de pastagens.; Manejo.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/46997

Lutte contre les salissures marines : approche par procédés enzymatiques.
Provedor de dados: 5
Autores: Leroy, Celine.
Fouling on marine underwater surfaces causes critical and economic problems such as important material biodamages and industrial performances reduction. We chose to test antifouling potential of enzymatic commercial preparations like hydrolases (proteases, glycosidases and lipases) in order to inhibit the first fouling adhesion step: bacterial biofilm formation. An evaluation test of antifouling properties onto marine bacterial adhesion was designed using a mono-incubation of Pseudoalteromonas sp. D41 in microtiter plate and in sterile natural sea water. This test was adapted to screen agents for bacterial adhesion removal or inhibition activities and allowed to test enzymatic preparations toxicity on non adhered bacteria. Inhibition rates according to...
Tipo: Text
Palavras-chave: Fouling; Adhesion; Antifouling; Hydrolases; EPS; DAPI; Microtiter plate; Screening; Pseudoalteromonas sp.; Marine biofilm; Salissure marine; Adhésion; Antisalissure; Hydrolases; EPS; DAPI; Microplaque; Criblage; Pseudoalteromonas sp.; Biofilm marin.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/these-1099.pdf

Viral degradation of marine bacterial exopolysaccharides
Provedor de dados: 5
Autores: Lelchat, Florian; Mocaer, P Y; Ojima, T; Michel, G; Sarthou, Geraldine; Bucciarelli, Eva; Cérantola, S; Colliec-jouault, Sylvia; Boisset, Claire; Baudoux, A-c.
The identification of the mechanisms by which marine dissolved organic matter (DOM) is produced and regenerated is critical to develop robust prediction of ocean carbon cycling. Polysaccharides represent one of the main constituents of marine DOM and their degradation is mainly attributed to polysaccharidases derived from bacteria. Here, we report that marine viruses can depolymerize the exopolysaccharides (EPS) excreted by their hosts using 5 bacteriophages that infect the notable EPS producer, Cobetia marina DSMZ 4741. Degradation monitorings as assessed by gel electrophoresis and size exclusion chromatography showed that 4 out of 5 phages carry structural enzymes that depolymerize purified solution of Cobetia marina EPS. The depolymerization patterns...
Tipo: Text
Palavras-chave: Marine phage; EPS; Polysaccharidase; DOM; Ocean.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00499/61062/64512.pdf

Spatio-temporal variations in intertidal mudflat erodability: Marennes-Oleron Bay, western France
Provedor de dados: 5
Autores: Orvain, Francis; Sauriau, Pierre-guy; Le Hir, Pierre; Guillou, Gael; Cann, Philippe; Paillard, Michel.
A portable erosion device (ERIS) was deployed in November 2000 and May 2001 to investigate the spatio-temporal variation of fine-grained sediment erosion over a transect on the intertidal mudflats of Marennes-Oleron Bay, western France. The objective was to relate changes in bed erodability over diurnal emersion periods to bioturbation, rapid changes in sediment characteristics, and microphytobenthos biomass.   Macrofaunal assemblages were dominated by the bivalve, Scrobicularia plana, on the upper mudflat, and by the gastropod, Hydrobia ulvae. on the middle mudflat. A power relationship was obtained where tau(cr) was plotted as a function of sediment density. Results from the upper part of the mudflat deviated from this relationship due to bioturbation by...
Tipo: Text
Palavras-chave: EPS; Microphytobenthos; Erodability; Intertidal mudflat; Sediment; Scrobicularia plana; Hydrobia ulvae; Bioturbation; Resuspension; Eris.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3779.pdf

Effets des caractéristiques physico-chimiques et biorhéologiques de l'eau sur la physiologie, les performances adaptatives et la sélection de l'habitat chez la sole commune Solea solea (Linnaeus, 1758)
Provedor de dados: 5
Autores: Couturier, Christine.
Shellfish culture can lead to an accumulation of exopolysaccharides (EPS) over the surface of intertidal mudflats. EPS are rheologically active polymers that change water viscosity and water flow over the branchial basket of the juvenile flatfish that colonise intertidal mudflats. The aim of this study was to assess the impact of water EPS content on various aspects of the physiology and behaviour of the common sole Solea solea. Field studies revealed that water total EPS can be up to 15 mg l 1 in the field. In sole juveniles (aged class 0+) ventilatory distress was observed at concentrations above 4 mg l-1, and the intensity of the constraint decreased with fish size. Nonetheless, neither standard metabolic rate nor tolerance of hypoxia were influenced...
Tipo: Text
Palavras-chave: Flatfish; SDA; Growth; Habitat selection; Metabolism; Hypoxia; EPS; Viscosity; Common sole; Poissons plats; SDA; Croissance; Sélection d'habitat; Métabolisme; Hypoxie; EPS; Viscosité; Sole commune.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/these-3461.pdf

Dynamique spatiale et temporelle de la production primaire de l'estuaire de la Seine
Provedor de dados: 5
Autores: Morelle, Jérôme.
The estuaries play an important ecological role and are the site of many human activities because of their strategic position at the interface between continental and marine waters. Seine estuary is characteristic of large anthropized estuaries. Long-term management requires better knowledge of the spatial and temporal dynamics of the estuarine food webs. Phytoplankton and microphytobenthos are the main contributor of primary production (PP) in these ecosystems and are at the basis of trophic food webs. These compartments are often reduced to the chlorophyll concentration and their productivity has never been measured along the Seine estuary. The objective of this study was to estimate the PP of these compartments along the salinity gradient. In order to...
Tipo: Text
Palavras-chave: PAM; ETR; 13C; TEP; EPS; Exopolymeric substances; Phytoplankton; Microphytobenthos; Transparent Exopolymeric Particles.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00498/60965/64373.pdf

Effects of water viscosity upon ventilation and metabolism of a flatfish, the common sole Solea solea (L.)
Provedor de dados: 5
Autores: Couturier, Christine; Rouault, Alice; Mckenzie, David; Galois, Robert; Robert, Serge; Joassard, Lucette; Claireaux, Guy.
The French Atlantic coast contains large highly productive intertidal mudflats that are colonised by juveniles of numerous flatfish species, including the common sole (Solea solea, L.). These ecosystems are also heavily exploited by the shellfish farming industry. Intensive bivalve culture is associated with substantial biodeposition (1-6 t-dw ha(-1) day(-1)), which directly or indirectly contributes to increase exopolysaccharide (EPS) concentrations at the interface between water column and seabed. EPS are long-chain molecules organised into colloids, which influence rheological properties of water, particularly viscosity. Increased water viscosity had consequences for ventilatory activity of juvenile flatfish, whereby the minimal pressure required to...
Tipo: Text
Palavras-chave: EPS; Hypoxia; Metabolism; Water viscosity; Biodeposition; Solea solea.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2801.pdf

The characterization and comparison of exopolysaccharides from two benthic diatoms with different biofilm formation abilities
Provedor de dados: 42
Autores: JIN,CUILI; YU,ZHAOWEI; PENG,SHUYA; FENG,KE; ZHANG,LIKUI; ZHOU,XIAOJIAN.
ABSTRACT Exopolysaccharide (EPS) of two benthic diatoms, Amphora sp. and Stauroneis sp., with different biofilm formation abilities were investigated. The ratio of suspension-cells/biofilm-cells was employed to indicate the diatom biofilm formation abilities. The soluble EPS from the supernatant of whole culture, tightly bound EPS from floating cells, loosely and tightly bound EPS from biofilm cells were fractionated as SL-EPS, F-TB-EPS, BF-LB-EPS and BF-TB-EPS, respectively. The analysis for productions and monosaccharide compositions indicated that EPS from two diatoms were different in terms of the productions, distributions, and monomer compositions. Amphora sp. produced more (1.5-fold) total exopolysaccharides, but less (&lt;0.4-fold) BF-TB-EPS than...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Benthic diatom; EPS; Biofilm formation ability; Monosaccharide composition; Glc-A.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401503

Production and characterization of exopolysaccharides (EPS) from biofilm forming marine bacterium
Provedor de dados: 52
Autores: Kumar,Muthusamy Ashok; Anandapandian,Kanapathi Thangavel Kasirajan; Parthiban,Karuppiah.
Marine water was used for the biofilm forming bacterial isolation. A biofilm forming device was made by using PVC pipes with sterile glass slides. Five morphologically different bacteria were isolated from the scrapping of glass slides from the device after a month period of time. The efficiency of EPS production was checked for all the isolates. Using scanning electron microscope (SEM), the morphology of microbial cells and colonies was studied. The maximum EPS was produced by the strain B3, which was analyzed and characterized by thin layer chromatography (TLC) and Fourier transform infrared spectroscopy (FTIR) spectra. B3 EPS displayed a strong absorption band of - OH at 3415.31 cm-1 and COOH at 1631.48 cm-1 showing it to be polysaccharide.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biofilm; Marine Bacteria; EPS; SEM; TLC and FTIR.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000200006

Application of a bacterial extracellular polymeric substance in heavy metal adsorption in a co-contaminated aqueous system
Provedor de dados: 58
Autores: Martins,Paula Salles de Oliveira; Almeida,Narcisa Furtado de; Leite,Selma Gomes Ferreira.
The application of a bacterial extracellular polymeric substance (EPS) in the bioremediation of heavy metals (Cd, Zn and Cu) by a microbial consortium in a hydrocarbon co-contaminated aqueous system was studied. At the low concentrations used in this work (1.00 ppm of each metal), it was not observed an inhibitory effect on the cellular growing. In the other hand, the application of the EPS lead to a lower concentration of the free heavy metals in solution, once a great part of them is adsorbed in the polymeric matrix (87.12% of Cd; 19.82% of Zn; and 37.64% of Cu), when compared to what is adsorbed or internalized by biomass (5.35% of Cd; 47.35% of Zn; and 24.93% of Cu). It was noted an increase of 24% in the consumption of ethylbenzene, among the gasoline...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: EPS; Co-contamination; Heavy metals; Natural attenuation.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000400034