Repozitorij Univerze v Novi Gorici

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Naslov:An extracellular polymeric substance quickly chelates mercury(II) with N-heterocyclic groups
Avtorji:Baldi, Franco (Avtor)
Gallo, Michele (Avtor)
Daniale, Salvatore (Avtor)
Battistel, Dario (Avtor)
Faleri, Claudia (Avtor)
Kodre, Alojz (Avtor)
Arčon, Iztok (Avtor)
Datoteke:Gradivo nima datotek. Gradivo je morda fizično dosegljivo v knjižnici fakultete, zalogo lahko preverite v COBISS-u. Povezava se odpre v novem oknu
Jezik:Angleški jezik
Vrsta gradiva:Delo ni kategorizirano (r6)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:UNG - Univerza v Novi Gorici
Opis:A strain of Klebsiella oxytoca DSM 29614 is grown on sodium citrate in the presence of 50 mg l−1 of Hg as Hg(NO3)2. During growth, the strain produces an extracellular polymeric substance (EPS), constituted by a mixture of proteins and a specific exopolysaccharide. The protein components, derived from the outer membrane of cells, are co-extracted with the extracellular exopolysaccharide using ethanol. The extracted EPS contains 7.5% of Hg (total amount). This indicates that EPS is an excellent material for the biosorption of Hg2+, through chemical complexation with the EPS components. The binding capacity of these species towards Hg2+ is studied by cyclic voltammetry, and Hg L3-edge XANES and EXAFS spectroscopy. The results found indicate that Hg2+ is mainly bound to the nitrogen of the imidazole ring or other N-heterocycle compounds. The hydroxyl moities of sugars and/or the carboxyl groups of two glucuronic acids in the polysaccharide can also play an important role in sequestring Hg2+ ions. However, N-heterocyclic groups of proteins bind Hg2+ faster than hydroxyl and carboxyl groups of the polysaccharide.
Ključne besede:Klebsiella oxytoca, Biosorption, Proteins, Polysaccharide, Cyclic voltammetry, EXAFS analysis
Leto izida:2017
Št. strani:10
Številčenje:February 2017
COBISS_ID:4706811 Povezava se odpre v novem oknu
URN:URN:SI:UNG:REP:MUXZ5NMW
DOI:10.1016/j.chemosphere.2017.02.093 Povezava se odpre v novem oknu
Število ogledov:1525
Število prenosov:0
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
Področja:Gradivo ni uvrščeno v področja.
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Skupna ocena:(0 glasov)
Vaša ocena:Ocenjevanje je dovoljeno samo prijavljenim uporabnikom.

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Gradivo je del revije

Naslov:Chemosphere
Založnik:Elsevier
ISSN:0045-6535
Leto izida:2017

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