{"refrec":{"BRefID":3148,"RR":"<b>Moureau, Z.; Jakubowski-Mania, B.; Oleski-Gebski, M.J.; Bossus, A.; Vandecasteele, C.M.; Cogneau, M.; Bonotto, S.; van der Ben, D.</b> (1990). Effects of technetium on marine micro-organisms. <i>Bull. Kon. Belg. Inst. Natuurwet. Biologie 60</i>: 241-248","BEntID":3148,"PublicFlag":1,"CheckedFlag":0,"wosflag":null,"vabbflag":null,"RefStringPartII":". <i>Bull. Kon. Belg. Inst. Natuurwet. Biologie 60</i>: 241-248","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Moureau, Z.; Jakubowski-Mania, B.; Oleski-Gebski, M.J.; Bossus, A.; Vandecasteele, C.M.; Cogneau, M.; Bonotto, S.; van der Ben, D.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Moureau, Z. <i>et al.</i>","Englishabstract":"Eleven bacterial species have been isolated from the upper layer of intertidal sediments collected along the Belgian coast (Coxyde). Three of them (no. 1, 4 and 11) have been chosen for their halophilous character. One species has been identified as <i>Flavobacterium halmephilum</i>, the other two are being investigated. Effects of technetium (<sup>99</sup>Tc) have been studied on a mixed bacterial population isolated from sediments, as well as on the three halophilic species.At the concentrations utilized in this work (up to 100 microg ml<sup>-1</sup>), <sup>99</sup>Tc has no evident effects on bacterial growth. Uptake of technetium (<sup>99</sup>Tc and/or <sup>95m</sup>Tc) has been investigated in the mixed bacterial population, in the three halophilic bacteria (including <i>Flavobacterium halmephilum</i>) and in the benthic ciliate <i>Uronema marinum</i>. It has been found that technetium is taken up by all these micro-organisms. However, the transfer factor (TF) in bacteria may vary considerably (from 0.5 to 200), but the cause of this variability is not known and deserves further study.The ciliate <i>Uronema marinum</i>, which feeds on living marine bacteria, was found to take up <sup>95m</sup>Tc added to the culture medium. However, the TF in this ciliate is rather low (from 1.4 to 5.5). Because it feeds on bacteria, <i>Uronema marinum</i> is supposed to take up technetium from water (direct contamination) as well as from contaminated bacteria (indirect contamination). Experiments with <sup>95m</sup>Tc-labeled bacterial cells might be useful, as they could indicate which form of contamination (direct or indirect) is prevailing.","AbstractOtherLang":"Onze souches bactériennes ont été isolées de la couche superficielle de sédiments prélevés le long de la côte belge (Coxyde). Trois souches (n<sup>o</sup> 1, 4 et 11) ont été choisies pour leur caractère halophile. Une espèce a été identifiée comme <i>Flavobacterium halmephilum</i> et les deux autres bactéries sont à l'étude. Les effets du technétium (<sup>99</sup>Tc) ont été étudiés sur ces trois souches de même que sur une population bactérienne mixte. Aux concentrations utilisées dans ce travail (jusqu'à 100 µg ml<sup>-1</sup>), le <sup>99</sup>Tc n'a pas d'effets évidents sur la croissance bactérienne. La fixation du technétium (<sup>99</sup>Tc et/ou <sup>95m</sup>Tc) a été étudiée dans les trois souches de bactéries dont <i>Flavobacterium halmephilum</i>, dans une population bactérienne mixte et dans le cilié benthique <i>Uronema marinum</i>. Il a été observé que le technétium est fixé par tous ces micro-organismes. Cependant, le facteur de transfert (FT) dans les bactéries peut varier fortement (de 0,5 à 200). La cause de cette variation n'est pas connue et nécessite une étude plus approfondie.","BibLvlCode":"AS","StandardTitle":"Effects of technetium on marine micro-organisms","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":1990,"MonPub":null,"DateUpdate":"2017-06-27","DateCreate":"2000-08-30","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":1},"refs":null,"anarec":{"AnaID":3148,"PubliDate":1990,"Pagination":"241-248","XtraPublOfAnaID":null,"ISBN":null,"Volume":"60","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":44202,"SerRR":"Bulletin van het Koninklijk Belgisch Instituut voor Natuurwetenschappen. 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