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Article: The role of microbial biofilms in deterioration of space station candidate materials

TitleThe role of microbial biofilms in deterioration of space station candidate materials
Authors
KeywordsBiofilms
Degradation
Microbial
Polymeric materials
Space station
Issue Date1998
PublisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/ibiod
Citation
International Biodeterioration And Biodegradation, 1998, v. 41 n. 1, p. 25-33 How to Cite?
AbstractFormation of microbial biofilms on surfaces of a wide range of materials being considered as candidates for use on the International Space Station was investigated. The materials included a fibre-reinforced polymeric composite, an adhesive sealant, a polyimide insulation foam, teflon cable insulation, titanium, and an aliphatic polyurethane coating. They were exposed to a natural mixed population of bacteria under controlled conditions of temperature and relative humidity (RH). Biofilms formed on the surfaces of the materials at a wide range of temperatures and RHs. The biofilm population was dominated by Pseudomonas aeruginosa, Ochrobactrum anthropi, Alcaligenes denitrificans, Xanthomonas maltophila, and Vibrio harveyi. The biocide, diiodomethyl-p-tolylsurfone, impregnated in the polyurethane coating, was ineffective against microbial colonization and growth. Degradation of the polyurethane coatings was monitored with electrochemical impedance spectroscopy (EIS). The impedance spectra indicated that microbial degradation of the coating occurred in several stages. The initial decreases in impedance were due to the transport of water and solutes into the polymeric matrices. Further decreases were a result of polymer degradation by microorganisms. Our data showed that these candidate materials for space application are susceptible to biofilm formation and subsequent degradation. Our study suggests that candidate materials for use in space missions need to be carefully evaluated for their susceptibility to microbial biofilm formation and biodegradation. | Formation of microbial biofilms on surfaces of a wide range of materials being considered as candidates for use on the International Space Station was investigated. The materials included a fibre-reinforced polymeric composite, an adhesive sealant, a polyimide insulation foam, teflon cable insulation, titanium, and an aliphatic polyurethane coating. They were exposed to a natural mixed population of bacteria under controlled conditions of temperature and relative humidity (RH). Biofilms formed on the surfaces of the materials at a wide range of temperatures and RHs. The biofilm population was dominated by Pseudomonas aeruginosa, Ochrobactrum anthropi, Alcaligenes denitrificans, Xanthomonas maltophila, and Vibrio harveyi. The biocide, diiodomethyl-p-tolyl-sulfone, impregnated in the polyurethane coating, was ineffective against microbial colonization and growth. Degradation of the polyurethane coatings was monitored with electrochemical impedance spectroscopy (EIS). The impedance spectra indicated that microbial degradation of the coating occurred in several stages. The initial decreases in impedance were due to the transport of water and solutes into the polymeric matrices. Further decreases were a result of polymer degradation by microorganisms. Our data showed that these candidate materials for space application are susceptible to biofilm formation and subsequent degradation. Our study suggests that candidate materials for use in space missions need to be carefully evaluated for their susceptibility to microbial biofilm formation and biodegradation.
Persistent Identifierhttp://hdl.handle.net/10722/73303
ISSN
2015 Impact Factor: 2.429
2015 SCImago Journal Rankings: 0.919
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorGu, JDen_HK
dc.contributor.authorRoman, Men_HK
dc.contributor.authorEsselman, Ten_HK
dc.contributor.authorMitchell, Ren_HK
dc.date.accessioned2010-09-06T06:50:02Z-
dc.date.available2010-09-06T06:50:02Z-
dc.date.issued1998en_HK
dc.identifier.citationInternational Biodeterioration And Biodegradation, 1998, v. 41 n. 1, p. 25-33en_HK
dc.identifier.issn0964-8305en_HK
dc.identifier.urihttp://hdl.handle.net/10722/73303-
dc.description.abstractFormation of microbial biofilms on surfaces of a wide range of materials being considered as candidates for use on the International Space Station was investigated. The materials included a fibre-reinforced polymeric composite, an adhesive sealant, a polyimide insulation foam, teflon cable insulation, titanium, and an aliphatic polyurethane coating. They were exposed to a natural mixed population of bacteria under controlled conditions of temperature and relative humidity (RH). Biofilms formed on the surfaces of the materials at a wide range of temperatures and RHs. The biofilm population was dominated by Pseudomonas aeruginosa, Ochrobactrum anthropi, Alcaligenes denitrificans, Xanthomonas maltophila, and Vibrio harveyi. The biocide, diiodomethyl-p-tolylsurfone, impregnated in the polyurethane coating, was ineffective against microbial colonization and growth. Degradation of the polyurethane coatings was monitored with electrochemical impedance spectroscopy (EIS). The impedance spectra indicated that microbial degradation of the coating occurred in several stages. The initial decreases in impedance were due to the transport of water and solutes into the polymeric matrices. Further decreases were a result of polymer degradation by microorganisms. Our data showed that these candidate materials for space application are susceptible to biofilm formation and subsequent degradation. Our study suggests that candidate materials for use in space missions need to be carefully evaluated for their susceptibility to microbial biofilm formation and biodegradation. | Formation of microbial biofilms on surfaces of a wide range of materials being considered as candidates for use on the International Space Station was investigated. The materials included a fibre-reinforced polymeric composite, an adhesive sealant, a polyimide insulation foam, teflon cable insulation, titanium, and an aliphatic polyurethane coating. They were exposed to a natural mixed population of bacteria under controlled conditions of temperature and relative humidity (RH). Biofilms formed on the surfaces of the materials at a wide range of temperatures and RHs. The biofilm population was dominated by Pseudomonas aeruginosa, Ochrobactrum anthropi, Alcaligenes denitrificans, Xanthomonas maltophila, and Vibrio harveyi. The biocide, diiodomethyl-p-tolyl-sulfone, impregnated in the polyurethane coating, was ineffective against microbial colonization and growth. Degradation of the polyurethane coatings was monitored with electrochemical impedance spectroscopy (EIS). The impedance spectra indicated that microbial degradation of the coating occurred in several stages. The initial decreases in impedance were due to the transport of water and solutes into the polymeric matrices. Further decreases were a result of polymer degradation by microorganisms. Our data showed that these candidate materials for space application are susceptible to biofilm formation and subsequent degradation. Our study suggests that candidate materials for use in space missions need to be carefully evaluated for their susceptibility to microbial biofilm formation and biodegradation.en_HK
dc.languageengen_HK
dc.publisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/ibioden_HK
dc.relation.ispartofInternational Biodeterioration and Biodegradationen_HK
dc.rightsInternational biodeterioration and Biodegradation. Copyright © Elsevier Ltd.en_HK
dc.subjectBiofilmsen_HK
dc.subjectDegradationen_HK
dc.subjectMicrobialen_HK
dc.subjectPolymeric materialsen_HK
dc.subjectSpace stationen_HK
dc.titleThe role of microbial biofilms in deterioration of space station candidate materialsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0964-8305&volume=41&spage=25&epage=33&date=1998&atitle=The+role+of+microbial+biofilms+in+deterioration+of+space+station+candidate+materialsen_HK
dc.identifier.emailGu, JD: jdgu@hkucc.hku.hken_HK
dc.identifier.authorityGu, JD=rp00701en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.pmid11541393en_HK
dc.identifier.scopuseid_2-s2.0-0031774722en_HK
dc.identifier.hkuros44850en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0031774722&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume41en_HK
dc.identifier.issue1en_HK
dc.identifier.spage25en_HK
dc.identifier.epage33en_HK
dc.identifier.isiWOS:000074133400004-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridGu, JD=7403129601en_HK
dc.identifier.scopusauthoridRoman, M=7102187733en_HK
dc.identifier.scopusauthoridEsselman, T=6701605729en_HK
dc.identifier.scopusauthoridMitchell, R=7403974570en_HK

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