About: Impact of ionic aluminium on extracellular phosphatases in acidified lakes.

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About: Impact of ionic aluminium on extracellular phosphatases in acidified lakes. 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)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Direct inhibiting effects of Al on extracellular phosphatases produced by the plankton were studied in lab experiments. Significant reduction of an apparent substrate affinity was found at Al concentrations 300-1000 g l<sup>-1</sup> at pH 4.5 and 4.8, while maximum acid phosphatase activity (APA) remained unchanged. Such behaviour of saturation kinetics is compatible with the assumption that ionic Al acts as a competitive inhibitor. To decide whether the observed Al effects could be explained alternatively by complexation of Al with substrate, the best fits of data with both possible models was statistically tested. Experimental results supported the competitive hypothesis rather than the complexation model. For pH values <5.2, the results of an Al-pH matrix experiment gave a more detailed picture: the higher the Al concentration, the wider was the pH range where Al could negatively affect APA. The ecological ramifications of this effect were evaluated in the context of field APA data on three strong Direct inhibiting effects of Al on extracellular phosphatases produced by the plankton were studied in lab experiments. Significant reduction of an apparent substrate affinity was found at Al concentrations 300-1000 g l<sup>-1</sup> at pH 4.5 and 4.8, while maximum acid phosphatase activity (APA) remained unchanged. Such behaviour of saturation kinetics is compatible with the assumption that ionic Al acts as a competitive inhibitor. To decide whether the observed Al effects could be explained alternatively by complexation of Al with substrate, the best fits of data with both possible models was statistically tested. Experimental results supported the competitive hypothesis rather than the complexation model. For pH values <5.2, the results of an Al-pH matrix experiment gave a more detailed picture: the higher the Al concentration, the wider was the pH range where Al could negatively affect APA. The ecological ramifications of this effect were evaluated in the context of field APA data on three strong (en)
Title	Impact of ionic aluminium on extracellular phosphatases in acidified lakes. Impact of ionic aluminium on extracellular phosphatases in acidified lakes. (en)
skos:prefLabel	Impact of ionic aluminium on extracellular phosphatases in acidified lakes. Impact of ionic aluminium on extracellular phosphatases in acidified lakes. (en)
skos:notation	RIV/60077387:_____/01:62013084!RIV/2003/AV0/A62003/N
http://linked.open.../vavai/riv/strany	578;587
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA206/00/0063), P(GA206/97/0072), Z(AV0Z6017912)
http://linked.open...iv/cisloPeriodika	9
http://linked.open...vai/riv/dodaniDat	2003
http://linked.open...aciTvurceVysledku	Kopáček, Jiří Nedoma, Jiří Vrba, Jaroslav
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	Hydrobiologický ústav AV ČR
http://linked.open...dnocenehoVysledku	682452
http://linked.open...ai/riv/idVysledku	RIV/60077387:_____/01:62013084
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	acid phosphatases; pH effect; inhibition (en)
http://linked.open.../riv/klicoveSlovo	inhibition acid phosphatases pH effect
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[CF4DE69EEB10]
http://linked.open...i/riv/nazevZdroje	Environmental Microbiology
http://linked.open...in/vavai/riv/obor	DA
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...ocetUcastnikuAkce	0 (xsd:int)
http://linked.open...nichUcastnikuAkce	0 (xsd:int)
http://linked.open...vavai/riv/projekt	Biodiversity of microbial loop ,carbon flow and nutrient cycling in acidified lakes in the Šumava Mountains : pathways and controlling mechanisms Biogeochemical cycles of nutrients in mountain catchment-lake ecosystems: Anthropogenic impacts and possibilities of recovery
http://linked.open...UplatneniVysledku	2001
http://linked.open...v/svazekPeriodika	3
http://linked.open...iv/tvurceVysledku	Kopáček, Jiří Nedoma, Jiří Vrba, Jaroslav Bittl, T.
http://linked.open...n/vavai/riv/zamer	Biotické interakce v pelagické zóně lenitických ekosystémů, údolních nádrží a jezer různé trofie v podmínkách výrazného snížení emisí v postkomunistické Evropě
issn	1462-2912
number of pages	10 (xsd:int)

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