scholarly journals Chemical Mutagenesis for Improvement of Production of a Biologically Active Extracellular Polymeric Substance by Halomonas xianhensis SUR308

2016 ◽  
Vol 7 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Jhuma Biswas ◽  
Amal K. Paul
Keyword(s):  
Extracellular Polymeric Substance ◽  
Biologically Active ◽  
Chemical Mutagenesis ◽  
Polymeric Substance

The extracellular polymeric substance of the green alga Penium margaritaceum and its role in biofilm formation

Biofilms ◽  
2005 ◽  
Vol 2 (2) ◽  
pp. 129-144 ◽  
Author(s):  
D. S. Domozych ◽  
S. Kort ◽  
S. Benton ◽  
T. Yu
Keyword(s):  
New York ◽  
Extracellular Polymeric Substance ◽  
Biofilm Formation ◽  
Glucuronic Acid ◽  
New York State ◽  
Immunofluorescence Analysis ◽  
Capsule Formation ◽  
Polymeric Substance ◽  
Cell Substrate ◽  
Initial Adhesion

The desmid Penium margaritaceum is a common resident of biofilms of shallow Adirondack wetlands in New York State, USA. It was isolated and grown in the laboratory where it readily formed biofilms and produced large amounts of extracellular polymeric substance (EPS). The EPS was separated into two fractions: an EPS gel and soluble EPS. Both fractions were rich in xylose, fucose and glucuronic acid. The EPS gels contained large amounts of 3-linked, 4-linked and 3,4-linked fucose, 3,4-linked glucuronic acid and terminal xylose linkages. The EPS gel consisted of a fibrillar matrix that linked cells and cell substrate together. Immunofluorescence analysis using an anti-EPS antibody revealed that EPS secretion occurs in several different modes, which contributes to initial adhesion, capsule formation and gliding.

scholarly journals Exploration of an Extracellular Polymeric Substance from Earthworm Gut Bacterium (Bacillus licheniformis) for Bioflocculation and Heavy Metal Removal Potential

2020 ◽  
Vol 10 (1) ◽  
pp. 349 ◽  
Author(s):  
Jayanta Kumar Biswas ◽  
Anurupa Banerjee ◽  
Binoy Sarkar ◽  
Dibyendu Sarkar ◽  
Santosh Kumar Sarkar ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Functional Groups ◽  
Bacillus Licheniformis ◽  
Extracellular Polymeric Substance ◽  
Electrostatic Interactions ◽  
Metal Removal ◽  
Metal Sorption ◽  
Polymeric Substance ◽  
13C Nuclear Magnetic Resonance ◽  
Earthworm Gut

The present study shows the potential of an extracellular polymeric substance (EPS) produced by Bacillus licheniformis strain KX657843 isolated from earthworm (Metaphire posthuma) gut in the sorption of Cu(II) and Zn(II) and in flocculation. After harvesting bacterial cells from sucrose supplemented denitrifying culture medium, the EPS was extracted following ethanolic extraction method. The Fourier Transform Infrared Spectroscopy (FTIR) and 1H and 13C Nuclear Magnetic Resonance (NMR) of EPS revealed its functional groups, electronegative constituents, unsaturated carbon, and carbonyl groups. The negatively charged functional groups of carbohydrates and protein moiety of the EPS endowed it with heavy metal binding capacity through electrostatic interactions. The highest flocculation activity (83%) of EPS was observed at 4 mg L−1 and pH 11. The metal sorption by EPS increased with increasing pH. At pH 8, the EPS was able to remove 86 and 81% Cu(II) and Zn(II), respectively, from a 25 mg L−1 metal solution. 94.8% of both the metals at 25 mg L−1 metal solutions were removed by EPS at EPS concentration of 100 mg L−1. From Langmuir isotherm model, the maximum sorption capacities of EPS were calculated to be 58.82 mg g−1 for Cu(II) and 52.45 mg g−1 for Zn(II). The bacterial EPS showed encouraging flocculating and metal sorption properties. The potential to remove Cu(II) and Zn(II) implies that the EPS obtained from the earthworm gut bacteria can be used as an effective agent for environmental remediation of heavy metals and in bioflocculation.

scholarly journals Extracellular polymeric substance‐mediated tolerance of Pseudomonas aeruginosa biofilms to atmospheric pressure nonthermal plasma treatment

2020 ◽  
Vol 17 (12) ◽  
pp. 2000108
Author(s):  
Nid'a H. Alshraiedeh ◽  
Stephen A. Kelly ◽  
Thomas P. Thompson ◽  
Padrig B. Flynn ◽  
Michael M. Tunney ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Plasma Treatment ◽  
Atmospheric Pressure ◽  
Extracellular Polymeric Substance ◽  
Nonthermal Plasma ◽  
Polymeric Substance

The bio-reduction of chromate with periplasmic reductase using a novel isolated strain Pseudoalteromonas sp. CF10-13

RSC Advances ◽  
2016 ◽  
Vol 6 (108) ◽  
pp. 106600-106607 ◽  
Author(s):  
Na Li ◽  
Yanzhuo Pan ◽  
Na Zhang ◽  
Xueyan Wang ◽  
Weizhi Zhou
Keyword(s):  
Functional Groups ◽  
Extracellular Polymeric Substance ◽  
Polymeric Substance

A novel isolated bacteriumPseudoalteromonassp. CF10-13 could reduce Cr(vi) to Cr(iii) by periplasic reductase with Cr(iii) bound to functional groups in extracellular polymeric substance (EPS) or leached to media as soulbe organic-Cr(iii).

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