About: Assessing biodegradability of plastics based on poly(vinyl alcohol) and protein wastes

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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
Description	Research was conducted into biodegradability of mixeds polymer films based on poly(vinyl alcohol), protein hydrolyzate (collagen hydrolyzate from wastes after chrome tanning) and sglycerol in an aqueous aerobic environment. Evaluation of biodegradation was based on carbon dioxide produced in the gas phase. Pure PVAL was degraded by a current mixed culture for water-treatment (unadapted) only after an approx. 10-day lag phase; during breakdown of mixed film the protein component and glycerol were broken down first and PVAL degradation occurred in the second stage. Biodegradation could be well described by 1st-order formal chemical kinetics. Repeated degradation by an adapted culture proceeded in a single stage with considerably shorter lag phase (< 30 h) at a simultaneously approx. 1.5-fold greater breakdown rate (rate constants). During degradation of substrates containing PVAL, microbiological tests proved an approx. 100-fold increase in numbers of PVAL-degrading bacteria. Added protein hydrolyzate + Research was conducted into biodegradability of mixeds polymer films based on poly(vinyl alcohol), protein hydrolyzate (collagen hydrolyzate from wastes after chrome tanning) and sglycerol in an aqueous aerobic environment. Evaluation of biodegradation was based on carbon dioxide produced in the gas phase. Pure PVAL was degraded by a current mixed culture for water-treatment (unadapted) only after an approx. 10-day lag phase; during breakdown of mixed film the protein component and glycerol were broken down first and PVAL degradation occurred in the second stage. Biodegradation could be well described by 1st-order formal chemical kinetics. Repeated degradation by an adapted culture proceeded in a single stage with considerably shorter lag phase (< 30 h) at a simultaneously approx. 1.5-fold greater breakdown rate (rate constants). During degradation of substrates containing PVAL, microbiological tests proved an approx. 100-fold increase in numbers of PVAL-degrading bacteria. Added protein hydrolyzate + (en)
Title	Assessing biodegradability of plastics based on poly(vinyl alcohol) and protein wastes Assessing biodegradability of plastics based on poly(vinyl alcohol) and protein wastes (en)
skos:prefLabel	Assessing biodegradability of plastics based on poly(vinyl alcohol) and protein wastes Assessing biodegradability of plastics based on poly(vinyl alcohol) and protein wastes (en)
skos:notation	RIV/70883521:28110/03:63501392!RIV/2004/MSM/281104/N
http://linked.open.../vavai/riv/strany	511-519
http://linked.open...avai/riv/aktivita	Z
http://linked.open...avai/riv/aktivity	Z(MSM 265200014), Z(MSM 281100002)
http://linked.open...iv/cisloPeriodika	79
http://linked.open...vai/riv/dodaniDat	2004
http://linked.open...aciTvurceVysledku	Růžička, Jan Řezníčková, Iveta Hoffmann, Jaromír
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	Univerzita Tomáše Bati ve Zlíně / Fakulta technologická
http://linked.open...dnocenehoVysledku	599155
http://linked.open...ai/riv/idVysledku	RIV/70883521:28110/03:63501392
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	polyvinyl alcohol, PVAL, protein, blends, extruded films, plastics, water environment, biodegradability, testing, assessing (en)
http://linked.open.../riv/klicoveSlovo	polyvinyl alcohol water environment protein testing blends plastics extruded films biodegradability assessing PVAL
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[B3B9B54C5832]
http://linked.open...i/riv/nazevZdroje	Polymer Degradation and Stability
http://linked.open...in/vavai/riv/obor	DJ
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...ocetUcastnikuAkce	0 (xsd:int)
http://linked.open...nichUcastnikuAkce	0 (xsd:int)
http://linked.open...UplatneniVysledku	2003
http://linked.open...v/svazekPeriodika	Neuveden
http://linked.open...iv/tvurceVysledku	Růžička, Jan Řezníčková, Iveta Alexy, Pavol Hoffmann, Jaromír Bakoš, Dušan Kozáková, Jarmila Precnerová, Lenka
http://linked.open...n/vavai/riv/zamer	http://linked.opendata.cz/resource/domain/vavai/zamer/MSM%20265200014 http://linked.opendata.cz/resource/domain/vavai/zamer/MSM%20281100002
issn	0141-3910
number of pages	9 (xsd:int)
http://localhost/t...ganizacniJednotka	28110

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