A possible chlorophycean affinity of some Neoproterozoic acritarchs
Two taxa of Neoproterozoic acritarchs of unknown affinity, Multifronsphaeridium pelorium and Species A, are analysed by electron microscopic (SEM, TEM) and chemical (micro-FTIR, pyrolysis GC–MS, thermal desorption–MS) methods. Both acritarch species are characterised by multi-branched processes and...
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| Veröffentlicht in: | Organic geochemistry 1999-01, Vol.30 (10), p.1323-1337 |
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| creator | Arouri, Khaled Greenwood, Paul F Walter, Malcolm R |
| description | Two taxa of Neoproterozoic acritarchs of unknown affinity,
Multifronsphaeridium pelorium and Species A, are analysed by electron microscopic (SEM, TEM) and chemical (micro-FTIR, pyrolysis GC–MS, thermal desorption–MS) methods. Both acritarch species are characterised by multi-branched processes and a remnant trilaminar sheath (TLS) structure. The TLS-bearing wall structures in these acritarchs suggest a possible biological affinity to chlorophyte algaenan. The molecular data obtained from the two acritarchs were generally similar and also consistent with a chlorophycean affinity. A significant aliphatic moiety is evident in these acritarchs as a short-chain series of
n-alkene/alkane pyrolysates and prominent aliphatic IR bands. The restricted molecular-weight range ( |
| doi_str_mv | 10.1016/S0146-6380(99)00105-9 |
| format | Article |
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Multifronsphaeridium pelorium and Species A, are analysed by electron microscopic (SEM, TEM) and chemical (micro-FTIR, pyrolysis GC–MS, thermal desorption–MS) methods. Both acritarch species are characterised by multi-branched processes and a remnant trilaminar sheath (TLS) structure. The TLS-bearing wall structures in these acritarchs suggest a possible biological affinity to chlorophyte algaenan. The molecular data obtained from the two acritarchs were generally similar and also consistent with a chlorophycean affinity. A significant aliphatic moiety is evident in these acritarchs as a short-chain series of
n-alkene/alkane pyrolysates and prominent aliphatic IR bands. The restricted molecular-weight range (<C
20) of the
n-alkene/alkane doublets and the lack of isoprenoid and other branched alkanes in the pyrolysates suggest a low degree of branching in the aliphatic component of these acritarch macromolecules. The significant methyl (CH
3) IR signal was attributed to the terminal groups of short
n-alkyl moieties. Alkylbenzenes, alkylphenols and alkylindoles were also significant pyrolysis products, indicating an aromatic component, although the latter two components may be attributed to artificially- and/or diagenetically-formed melanoidin moieties. The macromolecular structure of
Multifronsphaeridium sp. and Species A consists of short
n-alkylpolymethylenic chains, probably linked via ether/ester bonds, with possibly a small aromatic content. This study presents ultrastructural and molecular evidence of a genetic relationship between Neoproterozoic acritarchs and Chlorophyceae.</description><identifier>ISSN: 0146-6380</identifier><identifier>EISSN: 1873-5290</identifier><identifier>DOI: 10.1016/S0146-6380(99)00105-9</identifier><language>eng</language><publisher>Oxford: Elsevier Ltd</publisher><subject>Algae ; Algaenan ; Aromatic compounds ; Chlorophyceae ; Earth sciences ; Earth, ocean, space ; Electron microscopy ; Exact sciences and technology ; Fourier transform infrared spectroscopy ; Laser micropyrolysis GC–MS ; Macromolecules ; Micro-FTIR ; Molecular weight ; Neoproterozoic acritarchs ; Olefins ; Paleobotany ; Paleontology ; Paraffins ; Pyrolysis ; Stratigraphy ; Thermal desorption–MS ; Trilaminar sheath cell walls</subject><ispartof>Organic geochemistry, 1999-01, Vol.30 (10), p.1323-1337</ispartof><rights>1999 Elsevier Science Ltd</rights><rights>2000 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a456t-d661359222cd32bb98173cb58b66cc076b2c26190538c72caf2a0ac32b49fb4a3</citedby><cites>FETCH-LOGICAL-a456t-d661359222cd32bb98173cb58b66cc076b2c26190538c72caf2a0ac32b49fb4a3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/S0146-6380(99)00105-9$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>309,310,314,780,784,789,790,3549,23929,23930,25139,27923,27924,45994</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=1181169$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Arouri, Khaled</creatorcontrib><creatorcontrib>Greenwood, Paul F</creatorcontrib><creatorcontrib>Walter, Malcolm R</creatorcontrib><title>A possible chlorophycean affinity of some Neoproterozoic acritarchs</title><title>Organic geochemistry</title><description>Two taxa of Neoproterozoic acritarchs of unknown affinity,
Multifronsphaeridium pelorium and Species A, are analysed by electron microscopic (SEM, TEM) and chemical (micro-FTIR, pyrolysis GC–MS, thermal desorption–MS) methods. Both acritarch species are characterised by multi-branched processes and a remnant trilaminar sheath (TLS) structure. The TLS-bearing wall structures in these acritarchs suggest a possible biological affinity to chlorophyte algaenan. The molecular data obtained from the two acritarchs were generally similar and also consistent with a chlorophycean affinity. A significant aliphatic moiety is evident in these acritarchs as a short-chain series of
n-alkene/alkane pyrolysates and prominent aliphatic IR bands. The restricted molecular-weight range (<C
20) of the
n-alkene/alkane doublets and the lack of isoprenoid and other branched alkanes in the pyrolysates suggest a low degree of branching in the aliphatic component of these acritarch macromolecules. The significant methyl (CH
3) IR signal was attributed to the terminal groups of short
n-alkyl moieties. Alkylbenzenes, alkylphenols and alkylindoles were also significant pyrolysis products, indicating an aromatic component, although the latter two components may be attributed to artificially- and/or diagenetically-formed melanoidin moieties. The macromolecular structure of
Multifronsphaeridium sp. and Species A consists of short
n-alkylpolymethylenic chains, probably linked via ether/ester bonds, with possibly a small aromatic content. This study presents ultrastructural and molecular evidence of a genetic relationship between Neoproterozoic acritarchs and Chlorophyceae.</description><subject>Algae</subject><subject>Algaenan</subject><subject>Aromatic compounds</subject><subject>Chlorophyceae</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Electron microscopy</subject><subject>Exact sciences and technology</subject><subject>Fourier transform infrared spectroscopy</subject><subject>Laser micropyrolysis GC–MS</subject><subject>Macromolecules</subject><subject>Micro-FTIR</subject><subject>Molecular weight</subject><subject>Neoproterozoic acritarchs</subject><subject>Olefins</subject><subject>Paleobotany</subject><subject>Paleontology</subject><subject>Paraffins</subject><subject>Pyrolysis</subject><subject>Stratigraphy</subject><subject>Thermal desorption–MS</subject><subject>Trilaminar sheath cell walls</subject><issn>0146-6380</issn><issn>1873-5290</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1999</creationdate><recordtype>article</recordtype><recordid>eNqFkE1LAzEQhoMoWKs_QdiDiB5WM9lNdnOSUvyCogf1HLKzCY1sNzXZCvXXm7aiR09zeWbeeR9CToFeAQVx_UKhFLkoanoh5SWlQHku98gI6qrIOZN0n4x-kUNyFON7gioo6YhMJ9nSx-iazmQ473zwy_kaje4zba3r3bDOvM2iX5jsyfhl8IMJ_ss7zDQGN-iA83hMDqzuojn5mWPydnf7On3IZ8_3j9PJLNclF0PeCgEFl4wxbAvWNLKGqsCG140QiLQSDUMmQFJe1Fgx1JZpqjGhpbRNqYsxOd_dTW98rEwc1MJFNF2ne-NXUbHUkVcACeQ7EEPqFoxVy-AWOqwVULVRprbK1MaHklJtlSmZ9s5-AnRE3dmge3TxbxlqALHBbnaYSWU_nQkqojM9mtYFg4Nqvfsn6Bt2o3_k</recordid><startdate>19990101</startdate><enddate>19990101</enddate><creator>Arouri, Khaled</creator><creator>Greenwood, Paul F</creator><creator>Walter, Malcolm R</creator><general>Elsevier Ltd</general><general>Elsevier Science</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>19990101</creationdate><title>A possible chlorophycean affinity of some Neoproterozoic acritarchs</title><author>Arouri, Khaled ; Greenwood, Paul F ; Walter, Malcolm R</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a456t-d661359222cd32bb98173cb58b66cc076b2c26190538c72caf2a0ac32b49fb4a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1999</creationdate><topic>Algae</topic><topic>Algaenan</topic><topic>Aromatic compounds</topic><topic>Chlorophyceae</topic><topic>Earth sciences</topic><topic>Earth, ocean, space</topic><topic>Electron microscopy</topic><topic>Exact sciences and technology</topic><topic>Fourier transform infrared spectroscopy</topic><topic>Laser micropyrolysis GC–MS</topic><topic>Macromolecules</topic><topic>Micro-FTIR</topic><topic>Molecular weight</topic><topic>Neoproterozoic acritarchs</topic><topic>Olefins</topic><topic>Paleobotany</topic><topic>Paleontology</topic><topic>Paraffins</topic><topic>Pyrolysis</topic><topic>Stratigraphy</topic><topic>Thermal desorption–MS</topic><topic>Trilaminar sheath cell walls</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Arouri, Khaled</creatorcontrib><creatorcontrib>Greenwood, Paul F</creatorcontrib><creatorcontrib>Walter, Malcolm R</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><jtitle>Organic geochemistry</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Arouri, Khaled</au><au>Greenwood, Paul F</au><au>Walter, Malcolm R</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A possible chlorophycean affinity of some Neoproterozoic acritarchs</atitle><jtitle>Organic geochemistry</jtitle><date>1999-01-01</date><risdate>1999</risdate><volume>30</volume><issue>10</issue><spage>1323</spage><epage>1337</epage><pages>1323-1337</pages><issn>0146-6380</issn><eissn>1873-5290</eissn><abstract>Two taxa of Neoproterozoic acritarchs of unknown affinity,
Multifronsphaeridium pelorium and Species A, are analysed by electron microscopic (SEM, TEM) and chemical (micro-FTIR, pyrolysis GC–MS, thermal desorption–MS) methods. Both acritarch species are characterised by multi-branched processes and a remnant trilaminar sheath (TLS) structure. The TLS-bearing wall structures in these acritarchs suggest a possible biological affinity to chlorophyte algaenan. The molecular data obtained from the two acritarchs were generally similar and also consistent with a chlorophycean affinity. A significant aliphatic moiety is evident in these acritarchs as a short-chain series of
n-alkene/alkane pyrolysates and prominent aliphatic IR bands. The restricted molecular-weight range (<C
20) of the
n-alkene/alkane doublets and the lack of isoprenoid and other branched alkanes in the pyrolysates suggest a low degree of branching in the aliphatic component of these acritarch macromolecules. The significant methyl (CH
3) IR signal was attributed to the terminal groups of short
n-alkyl moieties. Alkylbenzenes, alkylphenols and alkylindoles were also significant pyrolysis products, indicating an aromatic component, although the latter two components may be attributed to artificially- and/or diagenetically-formed melanoidin moieties. The macromolecular structure of
Multifronsphaeridium sp. and Species A consists of short
n-alkylpolymethylenic chains, probably linked via ether/ester bonds, with possibly a small aromatic content. This study presents ultrastructural and molecular evidence of a genetic relationship between Neoproterozoic acritarchs and Chlorophyceae.</abstract><cop>Oxford</cop><pub>Elsevier Ltd</pub><doi>10.1016/S0146-6380(99)00105-9</doi><tpages>15</tpages></addata></record> |
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| ispartof | Organic geochemistry, 1999-01, Vol.30 (10), p.1323-1337 |
| issn | 0146-6380 1873-5290 |
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| source | ScienceDirect Journals (5 years ago - present) |
| subjects | Algae Algaenan Aromatic compounds Chlorophyceae Earth sciences Earth, ocean, space Electron microscopy Exact sciences and technology Fourier transform infrared spectroscopy Laser micropyrolysis GC–MS Macromolecules Micro-FTIR Molecular weight Neoproterozoic acritarchs Olefins Paleobotany Paleontology Paraffins Pyrolysis Stratigraphy Thermal desorption–MS Trilaminar sheath cell walls |
| title | A possible chlorophycean affinity of some Neoproterozoic acritarchs |
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