Linked Life Data

20950839

Source:http://linkedlifedata.com/resource/pubmed/id/20950839

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2010-12-27
pubmed:abstractText
To understand the temporal and spatial toxic effect of heavy metals on the microbial activities of biofilms, microelectrodes were used to measure the inhibitory oxygen (O(2)) concentration profiles resulted from the effects of zinc (Zn(2+)) and copper (Cu(2+)). Using the O(2) microprofiles as bases, the spatial distributions of net specific O(2) respiration were determined in biofilms with and without treatment of 5 mg/L Zn(2+) or 1 mg/L Cu(2+). Results show that microbial activities were inhibited only in the outer layer (?400 ?m) of the biofilms and bacteria present in the deeper sections of the biofilms became even more active. The inhibition caused by the heavy metals was evaluated by two methods. One was derived from the oxygen influx at the interface and the other was based on the integral of the oxygen consumption calculated from the entire O(2) profile. The two methods yielded significantly different results. We argue that the integral method results in more accurate assessment of toxicity than the surface flux determination.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
1879-2448
pubmed:author
pubmed:copyrightInfo
Copyright © 2010 Elsevier Ltd. All rights reserved.
pubmed:issnType
Electronic
pubmed:volume
45
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
953-9
pubmed:meshHeading
pubmed:year
2011
pubmed:articleTitle
Temporal and spatial inhibitory effects of zinc and copper on wastewater biofilms from oxygen concentration profiles determined by microelectrodes.
pubmed:affiliation
Department of Environmental Science and Engineering, Tsinghua University, Beijing, China.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't