Production and Characterization of a Novel Extracellular Polysaccharide Produced by Paenibacillus velaei, Sp. Nov
Paenibacillus velaei, sp. nov. is a soil bacterium capable of producing an unusually large amount of exopolysaccharide (EPS). The EPS contains glucose, mannose, galactose and fucose in a molar ratio of 4:2:1:1. The molecular weight of the EPS is higher than 2x106. The viscosity of 1% EPS is 1300 cP...
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University of North Texas
2000
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ndltd-unt.edu-info-ark-67531-metadc25512017-03-17T08:35:49Z Production and Characterization of a Novel Extracellular Polysaccharide Produced by Paenibacillus velaei, Sp. Nov Sukplang, Patamaporn Microbial exopolysaccharides. exopolysaccharide EPS a novel polysaccaride Paenibacillus velaei, sp. nov. is a soil bacterium capable of producing an unusually large amount of exopolysaccharide (EPS). The EPS contains glucose, mannose, galactose and fucose in a molar ratio of 4:2:1:1. The molecular weight of the EPS is higher than 2x106. The viscosity of 1% EPS is 1300 cP when measured at a shear rate of 1 sec-1. Physiological parameters for optimal production of the EPS were studied and it was found that 1.4 g dry weight per 1 l of medium was produced when the bacteria were grown at 30EC and the pH adjusted at 7± 0.2 in a medium containing glucose as the carbon source. Growing the bacteria on different carbon sources did not alter the quantity or the composition of the EPS produced. No toxicity effects were observed in mice or rats when EPS was administered in amounts ranging from 20 to 200 mg per kg body weight. The data obtained from physical, chemical and biological properties suggest that the EPS may be employed in several industrial and environmental applications. It is an excellent emulsifier, it holds 100 times its own weight in water, it is not toxic, and it can be used to remove mercury, cadmium and lead from aqueous solutions. University of North Texas Vela, G. Roland, 1927- O'Donovan, Gerard A. Farinha, Mark A. Golden, Teresa D. Shanley, Mark S. 2000-08 Thesis or Dissertation Text oclc: 49760322 untcat: b2369641 https://digital.library.unt.edu/ark:/67531/metadc2551/ ark: ark:/67531/metadc2551 English Use restricted to UNT Community Copyright Sukplang, Patamaporn Copyright is held by the author, unless otherwise noted. All rights reserved. |
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English |
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Microbial exopolysaccharides. exopolysaccharide EPS a novel polysaccaride |
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Microbial exopolysaccharides. exopolysaccharide EPS a novel polysaccaride Sukplang, Patamaporn Production and Characterization of a Novel Extracellular Polysaccharide Produced by Paenibacillus velaei, Sp. Nov |
description |
Paenibacillus velaei, sp. nov. is a soil bacterium capable of producing an unusually large amount of exopolysaccharide (EPS). The EPS contains glucose, mannose, galactose and fucose in a molar ratio of 4:2:1:1. The molecular weight of the EPS is higher than 2x106. The viscosity of 1% EPS is 1300 cP when measured at a shear rate of 1 sec-1. Physiological parameters for optimal production of the EPS were studied and it was found that 1.4 g dry weight per 1 l of medium was produced when the bacteria were grown at 30EC and the pH adjusted at 7± 0.2 in a medium containing glucose as the carbon source. Growing the bacteria on different carbon sources did not alter the quantity or the composition of the EPS produced. No toxicity effects were observed in mice or rats when EPS was administered in amounts ranging from 20 to 200 mg per kg body weight. The data obtained from physical, chemical and biological properties suggest that the EPS may be employed in several industrial and environmental applications. It is an excellent emulsifier, it holds 100 times its own weight in water, it is not toxic, and it can be used to remove mercury, cadmium and lead from aqueous solutions. |
author2 |
Vela, G. Roland, 1927- |
author_facet |
Vela, G. Roland, 1927- Sukplang, Patamaporn |
author |
Sukplang, Patamaporn |
author_sort |
Sukplang, Patamaporn |
title |
Production and Characterization of a Novel Extracellular Polysaccharide Produced by Paenibacillus velaei, Sp. Nov |
title_short |
Production and Characterization of a Novel Extracellular Polysaccharide Produced by Paenibacillus velaei, Sp. Nov |
title_full |
Production and Characterization of a Novel Extracellular Polysaccharide Produced by Paenibacillus velaei, Sp. Nov |
title_fullStr |
Production and Characterization of a Novel Extracellular Polysaccharide Produced by Paenibacillus velaei, Sp. Nov |
title_full_unstemmed |
Production and Characterization of a Novel Extracellular Polysaccharide Produced by Paenibacillus velaei, Sp. Nov |
title_sort |
production and characterization of a novel extracellular polysaccharide produced by paenibacillus velaei, sp. nov |
publisher |
University of North Texas |
publishDate |
2000 |
url |
https://digital.library.unt.edu/ark:/67531/metadc2551/ |
work_keys_str_mv |
AT sukplangpatamaporn productionandcharacterizationofanovelextracellularpolysaccharideproducedbypaenibacillusvelaeispnov |
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1718429138389303296 |