Jean François Rontani

Summary

Country: France

Publications

  1. ncbi request reprint Hydrogen and trimethylsilyl transfers during EI mass spectral fragmentation of hydroxycarboxylic and oxocarboxylic acid trimethylsilyl derivatives
    Jean François Rontani
    Laboratoire de Microbiologie de Géochimie et d Ecologie Marines UMR 6117, Centre d Océanologie de Marseille OSU, Campus de Luminy, Marseille, France
    J Am Soc Mass Spectrom 19:66-75. 2008
  2. ncbi request reprint Free radical oxidation (autoxidation) of alkenones and other lipids in cells of Emiliania huxleyi
    Jean François Rontani
    Laboratoire de Microbiologie Géochimie et Ecologie Marines UMR 6117, Centre d Océanologie de Marseille OSU, Campus de Luminy, Case 901, 13288 Marseille, France
    Phytochemistry 68:913-24. 2007
  3. doi request reprint Double bond migration to methylidene positions during electron ionization mass spectrometry of branched monounsaturated fatty acid derivatives
    Jean François Rontani
    Laboratoire de Microbiologie de Géochimie et d Ecologie Marines UMR CNRS 6117, Centre d Océanologie de Marseille OSU, Marseille, France
    J Am Soc Mass Spectrom 20:1997-2005. 2009
  4. ncbi request reprint Aerobic and anaerobic metabolism of squalene by a denitrifying bacterium isolated from marine sediment
    Jean François Rontani
    Laboratoire d Océanographie et de Biogéochimie UMR 6535, Centre d Océanologie de Marseille OSU, campus de Luminy case 901, 13288 Marseille, France
    Arch Microbiol 178:279-87. 2002
  5. ncbi request reprint Long-chain alkenones and related compounds in the benthic haptophyte Chrysotila lamellosa Anand HAP 17
    Jean François Rontani
    Laboratoire d Océanographie et de Biogéochimie UMR CNRS 6535, Centre d Océanologie de Marseille OSU, Campus de Luminy, Case 901, F 13288, Marseille, France
    Phytochemistry 65:117-26. 2004
  6. doi request reprint Production of pristane and phytane in the marine environment: role of prokaryotes
    Jean François Rontani
    Laboratoire de Microbiologie, de Géochimie et d Ecologie Marines UMR CNRS 6117, Campus de Luminy, 163 Avenue de Luminy, 13288 Marseille, France
    Res Microbiol 162:923-33. 2011
  7. ncbi request reprint Regiospecific oxygenation of alkenones in the benthic haptophyte Chrysotila lamellosa Anand HAP 17
    Jean François Rontani
    Laboratoire de Microbiologie de Biogéochimie et d Ecologie Microbienne UMR CNRS 6117, Centre d Océanologie de Marseille OSU, Campus de Luminy, Case 901, F 13288 Marseille, France
    Phytochemistry 65:3269-78. 2004
  8. doi request reprint Potential alteration of U37K' paleothermometer due to selective degradation of alkenones by marine bacteria isolated from the haptophyte Emiliania huxleyi
    Nathalie Zabeti
    Laboratoire de Microbiologie de Géochimie et d Ecologie Marines UMR 6117, Centre d Oceanologie de Marseille, Marseille, France
    FEMS Microbiol Ecol 73:83-94. 2010
  9. pmc Production of a polyunsaturated isoprenoid wax ester during aerobic metabolism of squalene by Marinobacter squalenivorans sp. nov
    Jean François Rontani
    Laboratoire d Océanographie et de Biogéochimie UMR 6535, Centre d Océanologie de Marseille OSU, Campus de Luminy, Case 901, 13288 Marseille, France
    Appl Environ Microbiol 69:4167-76. 2003
  10. ncbi request reprint Photochemical oxidation and autoxidation of chlorophyll phytyl side chain in senescent phytoplanktonic cells: potential sources of several acyclic isoprenoid compounds in the marine environment
    Jean François Rontani
    Laboratoire d Océanographie et de Biogéochimie UMR 6535, Centre d Oceanologie de Marseille, 13288 Marseille, France
    Lipids 38:241-54. 2003

Collaborators

Detail Information

Publications14

  1. ncbi request reprint Hydrogen and trimethylsilyl transfers during EI mass spectral fragmentation of hydroxycarboxylic and oxocarboxylic acid trimethylsilyl derivatives
    Jean François Rontani
    Laboratoire de Microbiologie de Géochimie et d Ecologie Marines UMR 6117, Centre d Océanologie de Marseille OSU, Campus de Luminy, Marseille, France
    J Am Soc Mass Spectrom 19:66-75. 2008
    ..Several fragmentation pathways involving trimethylsilyl and hydrogen transfers were proposed to explain the formation of these different fragment ions and were substantiated by deuterium labeling...
  2. ncbi request reprint Free radical oxidation (autoxidation) of alkenones and other lipids in cells of Emiliania huxleyi
    Jean François Rontani
    Laboratoire de Microbiologie Géochimie et Ecologie Marines UMR 6117, Centre d Océanologie de Marseille OSU, Campus de Luminy, Case 901, 13288 Marseille, France
    Phytochemistry 68:913-24. 2007
    ..The detection of characteristic alkenone autoxidation products in cells grown under these latter conditions allowed us to attribute the significant increase in index observed to the involvement of free radical oxidation processes...
  3. doi request reprint Double bond migration to methylidene positions during electron ionization mass spectrometry of branched monounsaturated fatty acid derivatives
    Jean François Rontani
    Laboratoire de Microbiologie de Géochimie et d Ecologie Marines UMR CNRS 6117, Centre d Océanologie de Marseille OSU, Marseille, France
    J Am Soc Mass Spectrom 20:1997-2005. 2009
    ....
  4. ncbi request reprint Aerobic and anaerobic metabolism of squalene by a denitrifying bacterium isolated from marine sediment
    Jean François Rontani
    Laboratoire d Océanographie et de Biogéochimie UMR 6535, Centre d Océanologie de Marseille OSU, campus de Luminy case 901, 13288 Marseille, France
    Arch Microbiol 178:279-87. 2002
    ..Under oxic conditions, the degradation of squalene by strain 2sq31 was rapid and involved oxidative splitting of the C-10/C-11 or C-14/C-15 double bonds, in addition to the pathways observed under denitrifying conditions...
  5. ncbi request reprint Long-chain alkenones and related compounds in the benthic haptophyte Chrysotila lamellosa Anand HAP 17
    Jean François Rontani
    Laboratoire d Océanographie et de Biogéochimie UMR CNRS 6535, Centre d Océanologie de Marseille OSU, Campus de Luminy, Case 901, F 13288, Marseille, France
    Phytochemistry 65:117-26. 2004
    ..The sterol distribution included the common haptophyte sterol 24alpha-methylcholesta-5,22E-dien-3beta-ol (epi-brassicasterol) as well as significant amounts of Delta(5)- and Delta(5,22)-C(29) sterols...
  6. doi request reprint Production of pristane and phytane in the marine environment: role of prokaryotes
    Jean François Rontani
    Laboratoire de Microbiologie, de Géochimie et d Ecologie Marines UMR CNRS 6117, Campus de Luminy, 163 Avenue de Luminy, 13288 Marseille, France
    Res Microbiol 162:923-33. 2011
    ..Prokaryotes thus appear to play a key role in formation of these isoprenoid alkanes in the marine environment...
  7. ncbi request reprint Regiospecific oxygenation of alkenones in the benthic haptophyte Chrysotila lamellosa Anand HAP 17
    Jean François Rontani
    Laboratoire de Microbiologie de Biogéochimie et d Ecologie Microbienne UMR CNRS 6117, Centre d Océanologie de Marseille OSU, Campus de Luminy, Case 901, F 13288 Marseille, France
    Phytochemistry 65:3269-78. 2004
    ..This work demonstrates that alkenones can be degraded by enzymatic reactions in senescent cells, and by implication this could also occur in the natural environment...
  8. doi request reprint Potential alteration of U37K' paleothermometer due to selective degradation of alkenones by marine bacteria isolated from the haptophyte Emiliania huxleyi
    Nathalie Zabeti
    Laboratoire de Microbiologie de Géochimie et d Ecologie Marines UMR 6117, Centre d Oceanologie de Marseille, Marseille, France
    FEMS Microbiol Ecol 73:83-94. 2010
    ..The widespread occurrence of epoxyalkenones in the marine environment strongly suggests that selective aerobic bacterial degradation could be major source of uncertainty for palaeotemperature estimation...
  9. pmc Production of a polyunsaturated isoprenoid wax ester during aerobic metabolism of squalene by Marinobacter squalenivorans sp. nov
    Jean François Rontani
    Laboratoire d Océanographie et de Biogéochimie UMR 6535, Centre d Océanologie de Marseille OSU, Campus de Luminy, Case 901, 13288 Marseille, France
    Appl Environ Microbiol 69:4167-76. 2003
    ..The bacterial strain is then characterized as a member of a new species, for which we propose the name Marinobacter squalenivorans sp. nov...
  10. ncbi request reprint Photochemical oxidation and autoxidation of chlorophyll phytyl side chain in senescent phytoplanktonic cells: potential sources of several acyclic isoprenoid compounds in the marine environment
    Jean François Rontani
    Laboratoire d Océanographie et de Biogéochimie UMR 6535, Centre d Oceanologie de Marseille, 13288 Marseille, France
    Lipids 38:241-54. 2003
    ..The results obtained supported the significance of photochemical oxidation and autoxidation of phytoplanktonic chlorophyll phytyl side chain in the marine environment...
  11. ncbi request reprint Regiospecific enzymatic oxygenation of cis-vaccenic acid during aerobic senescence of the halophilic purple sulfur bacterium Thiohalocapsa halophila
    Daphné Marchand
    Laboratoire d Océanographie et de Biogéochimie UMR 6535, Marseille, France
    Lipids 37:541-8. 2002
    ..Some of the specific oxidation products thus formed could constitute potential T. halophila biomarkers...
  12. ncbi request reprint On the origin of cis-vaccenic acid photodegradation products in the marine environment
    Jean François Rontani
    Laboratoire d Océanographie et de Biogéochimie UMR 6535, 13288 Marseille, France
    Lipids 38:1085-92. 2003
    ....
  13. ncbi request reprint Visible light-induced oxidation of unsaturated components of cutins: a significant process during the senescence of higher plants
    Jean François Rontani
    Laboratoire de Microbiologie Géochimie et Ecologie Marines UMR 6117, Faculté des Scs de Luminy, Centre d Océanologie de Marseille OSU, Campus de Luminy, Case 901, F 13288 Marseille Cedex, France
    Phytochemistry 66:313-21. 2005
    ..These results well support the significance of the photooxidation of the unsaturated components of higher plant cutins in the natural environment...
  14. doi request reprint Physiological alteration of the marine bacterium Vibrio angustum S14 exposed to simulated sunlight during growth
    Maher Abboudi
    Laboratoire de Microbiologie Géochimie et Ecologie Marines, CNRS INSU, UMR 6117, Centre d Oceanologie de Marseille, Universite de la Mediterranee, Campus de Luminy, Case 901, F 13288, Marseille Cedex 9, France
    Curr Microbiol 57:412-7. 2008
    ..Ecological consequences of these observations are discussed...