About: Biodegradation study on polycaprolactone with bimodal molecular weight distribution

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

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://onlinelibrary.wiley.com/doi/10.1002/app.38078/abstract
Description	Polycaprolactone (PCL) of bimodal molecular weight distribution was exposed to the action of enzymes-lipases from Aspergillus oryzae in phosphate buffer at pH 7 and 37 degree Celsius, and those produced in situ by Bacillus subtilis in nutrient medium at 30 degree Celsius for 42 days. The occurrence of biodegradation is proved on the basis of the weight loss, decrease of molecular weight, carbonyl index, crystallinity, and development of cracks on the PCL surfaces. In the case of Bacillus subtilis, the degradation (10 wt % loss of PCL) proceeds faster in comparison wit lipase from Aspergillus oryzae (2.6 wt % loss of PCL), where the degradation process seems to stop during 14 days of experiment. The gel permeation chromatography results reveal that preferential degradation of lower molecular portion did not occur but it is assumed that PCL chains were cleaved in accordance with particular degradation mechanism that depends significantly on biological agent. Polycaprolactone (PCL) of bimodal molecular weight distribution was exposed to the action of enzymes-lipases from Aspergillus oryzae in phosphate buffer at pH 7 and 37 degree Celsius, and those produced in situ by Bacillus subtilis in nutrient medium at 30 degree Celsius for 42 days. The occurrence of biodegradation is proved on the basis of the weight loss, decrease of molecular weight, carbonyl index, crystallinity, and development of cracks on the PCL surfaces. In the case of Bacillus subtilis, the degradation (10 wt % loss of PCL) proceeds faster in comparison wit lipase from Aspergillus oryzae (2.6 wt % loss of PCL), where the degradation process seems to stop during 14 days of experiment. The gel permeation chromatography results reveal that preferential degradation of lower molecular portion did not occur but it is assumed that PCL chains were cleaved in accordance with particular degradation mechanism that depends significantly on biological agent. (en)
Title	Biodegradation study on polycaprolactone with bimodal molecular weight distribution Biodegradation study on polycaprolactone with bimodal molecular weight distribution (en)
skos:prefLabel	Biodegradation study on polycaprolactone with bimodal molecular weight distribution Biodegradation study on polycaprolactone with bimodal molecular weight distribution (en)
skos:notation	RIV/00216305:26310/12:PU99253!RIV13-MSM-26310___
http://linked.open...avai/riv/aktivita	S Z
http://linked.open...avai/riv/aktivity	S, Z(MSM0021630501)
http://linked.open...iv/cisloPeriodika	17
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Mravcová, Ludmila Bálková, Radka Jančář, Josef Richtera, Lukáš Hermanová, Soňa Omelková, Jiřina Chamradová, Ivana
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	Vysoké učení technické v Brně / Fakulta chemická
http://linked.open...dnocenehoVysledku	125013
http://linked.open...ai/riv/idVysledku	RIV/00216305:26310/12:PU99253
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	polycaprolactone, degradation, lipase, Bacillus subtilis, Aspergillus oryzae, crystallinity, morphology, bimodal molecular weight distribution (en)
http://linked.open.../riv/klicoveSlovo	degradation polycaprolactone lipase Aspergillus oryzae bimodal molecular weight distribution crystallinity Bacillus subtilis morphology
http://linked.open...odStatuVydavatele	CZ - Česká republika
http://linked.open...ontrolniKodProRIV	[4AEC7F4F5450]
http://linked.open...i/riv/nazevZdroje	Journal of Applied Polymer Sciences
http://linked.open...in/vavai/riv/obor	CD
http://linked.open...ichTvurcuVysledku	7 (xsd:int)
http://linked.open...cetTvurcuVysledku	8 (xsd:int)
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	2012
http://linked.open...iv/tvurceVysledku	Bálková, Radka Jančář, Josef Mravcová, Ludmila Omelková, Jiřina Hermanová, Soňa Richtera, Lukáš Voběrková, Stanislava Chamradová, Ivana
http://linked.open...n/vavai/riv/zamer	Multifunkční heterogenní materiály na bázi syntetických polymerů a biopolymerů
issn	0021-8995
number of pages	10 (xsd:int)
http://localhost/t...ganizacniJednotka	26310

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