About: Silver and/or copper vermiculites and their antibacterial effect

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About: Silver and/or copper vermiculites and their antibacterial effect Goto Sponge NotDistinct Permalink

An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://www.irsm.cas.cz/index.php?page=acta_content&id=79
Description	Vermiculite (V) from Brazil with aqueous solutions AgNO3 and/or Cu(NO3)2 was used for preparation of nanocomposites V/Ag, V/Cu, V/AgCu and V/CuAg using two procedures and their effect on bacteria was compared. Structural changes were evaluated using X-ray diffraction (XRD) analysis, Infrared spectroscopy (IRS) and Scanning electron microscopy (SEM). Elemental chemical composition was determined using X-ray fluorescence (XRF) analysis and the solutions were analyzed by Atomic emission spectroscopy with inductively coupled plasma (AES-ICP). Antibacterial properties of Ag- and Cu-vermiculites and combined Ag/Cu-vermiculites were tested on two bacteria groups: (1) Gram-positive, (Staphylococcus aureus and Enterococcus faecalis) and (2) Gram-negative, (Pseudomonas aeruginosa and Klebsiella pneumoniae). The samples under antibacterial testing showed different effective times and minimum inhibitory concentration (MIC) values. The Gram-negative bacteria showed higher sensitivity to the prepared samples than Gram-positive bacteria. The combined Cu/Ag vermiculites stopped the bacterial growth at lower MIC value. Vermiculite (V) from Brazil with aqueous solutions AgNO3 and/or Cu(NO3)2 was used for preparation of nanocomposites V/Ag, V/Cu, V/AgCu and V/CuAg using two procedures and their effect on bacteria was compared. Structural changes were evaluated using X-ray diffraction (XRD) analysis, Infrared spectroscopy (IRS) and Scanning electron microscopy (SEM). Elemental chemical composition was determined using X-ray fluorescence (XRF) analysis and the solutions were analyzed by Atomic emission spectroscopy with inductively coupled plasma (AES-ICP). Antibacterial properties of Ag- and Cu-vermiculites and combined Ag/Cu-vermiculites were tested on two bacteria groups: (1) Gram-positive, (Staphylococcus aureus and Enterococcus faecalis) and (2) Gram-negative, (Pseudomonas aeruginosa and Klebsiella pneumoniae). The samples under antibacterial testing showed different effective times and minimum inhibitory concentration (MIC) values. The Gram-negative bacteria showed higher sensitivity to the prepared samples than Gram-positive bacteria. The combined Cu/Ag vermiculites stopped the bacterial growth at lower MIC value. (en)
Title	Silver and/or copper vermiculites and their antibacterial effect Silver and/or copper vermiculites and their antibacterial effect (en)
skos:prefLabel	Silver and/or copper vermiculites and their antibacterial effect Silver and/or copper vermiculites and their antibacterial effect (en)
skos:notation	RIV/61989100:27640/13:86085242!RIV14-GA0-27640___
http://linked.open...avai/riv/aktivita	P S
http://linked.open...avai/riv/aktivity	P(ED1.1.00/02.0070), P(GAP210/11/2215), S
http://linked.open...iv/cisloPeriodika	1
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Valášková, Marta Tomášek, Vladimír Hundáková, Marianna
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoká škola báňská - Technická univerzita Ostrava / Centrum nanotechnologií
http://linked.open...dnocenehoVysledku	105080
http://linked.open...ai/riv/idVysledku	RIV/61989100:27640/13:86085242
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	antibacterial effect; structure characterization; copper; silver; vermiculite (en)
http://linked.open.../riv/klicoveSlovo	antibacterial effect vermiculite copper silver structure characterization
http://linked.open...odStatuVydavatele	CZ - Česká republika
http://linked.open...ontrolniKodProRIV	[D6B368991B68]
http://linked.open...i/riv/nazevZdroje	Acta Geodynamica et Geomaterialia
http://linked.open...in/vavai/riv/obor	JI
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Study and evaluation of vermiculite structures modified in role of nanofillers and substrates IT4Innovations Centre of Excellence
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	10
http://linked.open...iv/tvurceVysledku	Hundáková, Marianna Matějová, Kateřina Pazdziora, Erich Valášková, Marta Tomášek, Vladimír
http://linked.open...ain/vavai/riv/wos	000320087700009
issn	1214-9705
number of pages	8 (xsd:int)
http://bibframe.org/vocab/doi	10.13168/AGG.2013.0009
http://localhost/t...ganizacniJednotka	27640

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