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Article: Formation of tabular single-domain magnetite induced by Geobacter metallireducens GS-15

TitleFormation of tabular single-domain magnetite induced by Geobacter metallireducens GS-15
Authors
KeywordsSpecies Index: Bacteria (Microorganisms)
Geobacter
Geobacter Metallireducens Gs-15
Issue Date2004
PublisherNational Academy of Sciences. The Journal's web site is located at http://www.pnas.org
Citation
Proceedings Of The National Academy Of Sciences Of The United States Of America, 2004, v. 101 n. 46, p. 16121-16126 How to Cite?
AbstractDistinct morphological characteristics of magnetite formed intracellularly by magnetic bacteria (magnetosome) are invoked as compelling evidence for biological activity on Earth and possibly on Mars. Crystals of magnetite produced extracellularly by a variety of bacteria including Geobacter metallireducens GS-15, thermophilic bacteria, and psychrotolerant bacteria are, however, traditionally not thought to have nearly as distinct morphologies. The size and shape of extracellular magnetite depend on the culture conditions and type of bacteria. Under typical CO2-rich culture conditions, GS-15 is known to produce superparamagnetic magnetite (crystal diameters of approximately < 30 nm). In the current study, we were able to produce a unique form of tabular, single-domain magnetite under nontraditional (low-CO2) culture conditions. This magnetite has a distinct crystal habit and magnetic properties. This magnetite could be used as a biosignature to recognize ancient biological activities in terrestrial and extraterrestrial environments and also may be a major carrier of the magnetization in natural sediments.
Persistent Identifierhttp://hdl.handle.net/10722/91305
ISSN
2015 Impact Factor: 9.423
2015 SCImago Journal Rankings: 6.883
PubMed Central ID
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorVali, Hen_HK
dc.contributor.authorWeiss, Ben_HK
dc.contributor.authorLi, YLen_HK
dc.contributor.authorSears, SKen_HK
dc.contributor.authorSoon, SKen_HK
dc.contributor.authorKirschvink, JLen_HK
dc.contributor.authorZhang, CLen_HK
dc.date.accessioned2010-09-17T10:16:40Z-
dc.date.available2010-09-17T10:16:40Z-
dc.date.issued2004en_HK
dc.identifier.citationProceedings Of The National Academy Of Sciences Of The United States Of America, 2004, v. 101 n. 46, p. 16121-16126en_HK
dc.identifier.issn0027-8424en_HK
dc.identifier.urihttp://hdl.handle.net/10722/91305-
dc.description.abstractDistinct morphological characteristics of magnetite formed intracellularly by magnetic bacteria (magnetosome) are invoked as compelling evidence for biological activity on Earth and possibly on Mars. Crystals of magnetite produced extracellularly by a variety of bacteria including Geobacter metallireducens GS-15, thermophilic bacteria, and psychrotolerant bacteria are, however, traditionally not thought to have nearly as distinct morphologies. The size and shape of extracellular magnetite depend on the culture conditions and type of bacteria. Under typical CO2-rich culture conditions, GS-15 is known to produce superparamagnetic magnetite (crystal diameters of approximately < 30 nm). In the current study, we were able to produce a unique form of tabular, single-domain magnetite under nontraditional (low-CO2) culture conditions. This magnetite has a distinct crystal habit and magnetic properties. This magnetite could be used as a biosignature to recognize ancient biological activities in terrestrial and extraterrestrial environments and also may be a major carrier of the magnetization in natural sediments.en_HK
dc.languageengen_HK
dc.publisherNational Academy of Sciences. The Journal's web site is located at http://www.pnas.orgen_HK
dc.relation.ispartofProceedings of the National Academy of Sciences of the United States of Americaen_HK
dc.subjectSpecies Index: Bacteria (Microorganisms)en_HK
dc.subjectGeobacteren_HK
dc.subjectGeobacter Metallireducens Gs-15en_HK
dc.titleFormation of tabular single-domain magnetite induced by Geobacter metallireducens GS-15en_HK
dc.typeArticleen_HK
dc.identifier.emailLi, YL:yiliang@hkucc.hku.hken_HK
dc.identifier.authorityLi, YL=rp01354en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1073/pnas.0404040101en_HK
dc.identifier.pmid15525704-
dc.identifier.pmcidPMC528942-
dc.identifier.scopuseid_2-s2.0-9244241501en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-9244241501&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume101en_HK
dc.identifier.issue46en_HK
dc.identifier.spage16121en_HK
dc.identifier.epage16126en_HK
dc.identifier.isiWOS:000225226200009-
dc.publisher.placeUnited Statesen_HK
dc.identifier.f10001022191-
dc.identifier.scopusauthoridVali, H=7004175757en_HK
dc.identifier.scopusauthoridWeiss, B=35273707000en_HK
dc.identifier.scopusauthoridLi, YL=27171876700en_HK
dc.identifier.scopusauthoridSears, SK=7005623734en_HK
dc.identifier.scopusauthoridSoon, SK=7004230574en_HK
dc.identifier.scopusauthoridKirschvink, JL=7006291845en_HK
dc.identifier.scopusauthoridZhang, CL=7405489900en_HK

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