Magnesium uptake by Sphaerotilus natans
Identifieur interne : 001638 ( Istex/Corpus ); précédent : 001637; suivant : 001639Magnesium uptake by Sphaerotilus natans
Auteurs : A. Converti ; G. Fiorito ; M. Zilli ; A. Lodi ; M. Del Borghi ; G. FerraioloSource :
- Bioprocess Engineering [ 0178-515X ] ; 1992-01-01.
Abstract
Abstract: Aim of the present paper is to give a contribution for a better understanding of the mechanism of magnesium accumulation by cells of Sphaerotilus natans. The results presented in this paper seem to confirm the non strictly biological nature of the phenomenon. An inhibiting effect of ethanol on the uptake is also evidenced and a hypothesis for the inhibition mechanism, implying the simultaneous occurrence of both physical and biological phenomena, is presented. In the presence of ethanol a film around the cell membrane is likely to be produced, partially preventing the adhesion of magnesium ions on the wall; subsequently, ethanol would be transformed into acetic acid and magnesium removed from the cell wall as a salt. All the efforts to improve the process yields and the resistance of the microorganism to ethanol, through specific adaptions, have not given the expected results.
Url:
DOI: 10.1007/BF00705163
Links to Exploration step
ISTEX:CCAD3A031BF7FE2A4DF9722FEC21517D40BBF706Le document en format XML
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The results presented in this paper seem to confirm the non strictly biological nature of the phenomenon. An inhibiting effect of ethanol on the uptake is also evidenced and a hypothesis for the inhibition mechanism, implying the simultaneous occurrence of both physical and biological phenomena, is presented. In the presence of ethanol a film around the cell membrane is likely to be produced, partially preventing the adhesion of magnesium ions on the wall; subsequently, ethanol would be transformed into acetic acid and magnesium removed from the cell wall as a salt. All the efforts to improve the process yields and the resistance of the microorganism to ethanol, through specific adaptions, have not given the expected results.</div></front></TEI><istex><corpusName>springer</corpusName><author><json:item><name>A. 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The results presented in this paper seem to confirm the non strictly biological nature of the phenomenon. An inhibiting effect of ethanol on the uptake is also evidenced and a hypothesis for the inhibition mechanism, implying the simultaneous occurrence of both physical and biological phenomena, is presented. In the presence of ethanol a film around the cell membrane is likely to be produced, partially preventing the adhesion of magnesium ions on the wall; subsequently, ethanol would be transformed into acetic acid and magnesium removed from the cell wall as a salt. All the efforts to improve the process yields and the resistance of the microorganism to ethanol, through specific adaptions, have not given the expected results.</Para></Abstract><AbbreviationGroup><AbbreviationGroupSection ID="AGS1"><Heading>List of Symbols</Heading><DefinitionList><DefinitionListEntry><Term><Emphasis Type="Italic">I</Emphasis> kg/m<Superscript>3</Superscript></Term><Description><Para>inhibitor concentration</Para></Description></DefinitionListEntry><DefinitionListEntry><Term><Emphasis Type="Italic">t</Emphasis> d</Term><Description><Para>magnesium removal time</Para></Description></DefinitionListEntry><DefinitionListEntry><Term><Emphasis Type="Italic">τ</Emphasis> d</Term><Description><Para>residence time</Para></Description></DefinitionListEntry><DefinitionListEntry><Term><Emphasis Type="Italic">S</Emphasis><Subscript><Emphasis Type="Italic">f</Emphasis></Subscript> kg/m<Superscript>3</Superscript></Term><Description><Para>residual magnesium concentration corresponding to<Emphasis Type="Italic">Y</Emphasis><Subscript>max</Subscript></Para></Description></DefinitionListEntry><DefinitionListEntry><Term><Emphasis Type="Italic">X</Emphasis> kg/m<Superscript>3</Superscript></Term><Description><Para>biomass concentration</Para></Description></DefinitionListEntry><DefinitionListEntry><Term><Emphasis Type="Italic">Y</Emphasis></Term><Description><Para>magnesium uptake yield</Para></Description></DefinitionListEntry><DefinitionListEntry><Term><Emphasis Type="Italic">ν</Emphasis> kg/(m<Superscript>3</Superscript> · d)</Term><Description><Para>magnesium uptake rate</Para></Description></DefinitionListEntry></DefinitionList></AbbreviationGroupSection><AbbreviationGroupSection ID="AGS2"><Heading>Subscripts</Heading><DefinitionList><DefinitionListEntry><Term><Emphasis Type="Italic">max</Emphasis></Term><Description><Para>maximum value</Para></Description></DefinitionListEntry><DefinitionListEntry><Term><Emphasis Type="Italic">0</Emphasis></Term><Description><Para>starting value</Para></Description></DefinitionListEntry></DefinitionList></AbbreviationGroupSection></AbbreviationGroup></ArticleHeader><NoBody></NoBody></Article></Issue></Volume></Journal></Publisher></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Magnesium uptake by Sphaerotilus natans</title><subTitle>The inhibiting effect of ethanol</subTitle></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Magnesium uptake by Sphaerotilus natans</title><subTitle>The inhibiting effect of ethanol</subTitle></titleInfo><name type="personal" displayLabel="corresp"><namePart type="given">A.</namePart><namePart type="family">Converti</namePart><affiliation>Institute of Chemical Engineering Science and Technology, University of Genoa, Via Opera Pia 15, I-16145, Genoa, Italy</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart 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authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract lang="en">Abstract: Aim of the present paper is to give a contribution for a better understanding of the mechanism of magnesium accumulation by cells of Sphaerotilus natans. The results presented in this paper seem to confirm the non strictly biological nature of the phenomenon. An inhibiting effect of ethanol on the uptake is also evidenced and a hypothesis for the inhibition mechanism, implying the simultaneous occurrence of both physical and biological phenomena, is presented. In the presence of ethanol a film around the cell membrane is likely to be produced, partially preventing the adhesion of magnesium ions on the wall; subsequently, ethanol would be transformed into acetic acid and magnesium removed from the cell wall as a salt. All the efforts to improve the process yields and the resistance of the microorganism to ethanol, through specific adaptions, have not given the expected results.</abstract><note>Originals</note><relatedItem type="host"><titleInfo><title>Bioprocess Engineering</title></titleInfo><titleInfo type="abbreviated"><title>Bioprocess Engineering</title></titleInfo><genre type="Journal" displayLabel="Archive Journal"></genre><originInfo><dateIssued encoding="w3cdtf">1992-01-01</dateIssued><copyrightDate encoding="w3cdtf">1992</copyrightDate></originInfo><subject><genre>Chemistry</genre><topic>Biotechnology</topic><topic>Food Science</topic><topic>Industrial Chemistry/Chemical Engineering</topic><topic>Waste Management/Waste Technology</topic><topic>Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution</topic></subject><identifier type="ISSN">0178-515X</identifier><identifier type="eISSN">1615-7605</identifier><identifier type="JournalID">449</identifier><identifier type="IssueArticleCount">9</identifier><identifier type="VolumeIssueCount">8</identifier><part><date>1992</date><detail type="volume"><number>7</number><caption>vol.</caption></detail><detail type="issue"><number>7</number><caption>no.</caption></detail><extent unit="pages"><start>325</start><end>330</end></extent></part><recordInfo><recordOrigin>Springer-Verlag, 1992</recordOrigin></recordInfo></relatedItem><identifier type="istex">CCAD3A031BF7FE2A4DF9722FEC21517D40BBF706</identifier><identifier type="DOI">10.1007/BF00705163</identifier><identifier type="ArticleID">Art9</identifier><identifier type="ArticleID">BF00705163</identifier><accessCondition type="use and reproduction" contentType="copyright">Springer-Verlag</accessCondition><recordInfo><recordContentSource>SPRINGER</recordContentSource><recordOrigin>Springer-Verlag, 1992</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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