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Volumn 46, Issue 6, 2012, Pages 408-422

Mass spectrometric analysis in planetary science: Investigation of the surface and the atmosphere

Author keywords

[No Author keywords available]

Indexed keywords


EID: 84869465334     PISSN: 00380946     EISSN: None     Source Type: Journal    
DOI: 10.1134/S003809461206007X     Document Type: Article
Times cited : (30)

References (52)
  • 2
    • 68349155700 scopus 로고    scopus 로고
    • A Neutral Gas Mass Spectrometer to Measure the Chemical Composition of the Stratosphere
    • Abplanalp, D., Wurz, P., Huber, L., et al., A Neutral Gas Mass Spectrometer to Measure the Chemical Composition of the Stratosphere, Adv. Space Res., 2009, vol. 44, pp. 870-878.
    • (2009) Adv. Space Res. , vol.44 , pp. 870-878
    • Abplanalp, D.1    Wurz, P.2    Huber, L.3
  • 3
    • 77955553543 scopus 로고    scopus 로고
    • An Optimized Compact Electron Impact Ion Storage Source for a Time-of-Flight Mass Spectrometer
    • Abplanalp, D., Wurz, P., Huber, L., and Leya, I., An Optimized Compact Electron Impact Ion Storage Source for a Time-of-Flight Mass Spectrometer, Int. J. Mass Spectrom. Ion Processes, 2010, vol. 294, pp. 33-39.
    • (2010) Int. J. Mass Spectrom. Ion Processes , vol.294 , pp. 33-39
    • Abplanalp, D.1    Wurz, P.2    Huber, L.3    Leya, I.4
  • 6
    • 34249740138 scopus 로고    scopus 로고
    • ROSINA-Rosetta Orbiter Spectrometer for Ion and Neutral Analysis
    • Balsiger, H., Altwegg, K., Bochsler, P., et al., ROSINA-Rosetta Orbiter Spectrometer for Ion and Neutral Analysis, Space Sci. Rev., 2007, vol. 128, pp. 745-801.
    • (2007) Space Sci. Rev. , vol.128 , pp. 745-801
    • Balsiger, H.1    Altwegg, K.2    Bochsler, P.3
  • 7
    • 0041706201 scopus 로고    scopus 로고
    • State-of-the-Art in Inorganic Mass Spectrometry for Analysis of High-Purity Materials
    • Becker, J. S. and Dietze, H.-J., State-of-the-Art in Inorganic Mass Spectrometry for Analysis of High-Purity Materials, Int. J. Mass Spectr., 2003, vol. 228, pp. 127-150.
    • (2003) Int. J. Mass Spectr. , vol.228 , pp. 127-150
    • Becker, J.S.1    Dietze, H.-J.2
  • 8
    • 62149087188 scopus 로고    scopus 로고
    • K-Ar Dating of Rocks on Mars: Requirements from Martian Meteorite Analyses and Isochron Modeling
    • Bogard, D. D., K-Ar Dating of Rocks on Mars: Requirements from Martian Meteorite Analyses and Isochron Modeling, Meteor. Planet. Sci., 2009, vol. 44, no. 1, pp. 3-14.
    • (2009) Meteor. Planet. Sci. , vol.44 , Issue.1 , pp. 3-14
    • Bogard, D.D.1
  • 10
    • 0028424218 scopus 로고
    • Laser Elemental Mass Analysis at Large Distances
    • DeYoung, R. J. and Situ, W., Laser Elemental Mass Analysis at Large Distances, Appl. Phys. Lett., 1994, vol. 64, no. 22, pp. 2943-2945.
    • (1994) Appl. Phys. Lett. , vol.64 , Issue.22 , pp. 2943-2945
    • DeYoung, R.J.1    Situ, W.2
  • 11
    • 0013152016 scopus 로고
    • Inorganic Trace Analysis by Laser-Induced Mass Spectrometry
    • A. Vertes, R. Gijbels, and F. Adams (Eds.), New York: Wiley
    • Dietze, H. J. and Becker, J. S., Inorganic Trace Analysis by Laser-Induced Mass Spectrometry, in Laser Ionization Mass Analysis, Vertes, A., Gijbels, R., and Adams, F., Eds., New York: Wiley, 1993, pp. 453-504.
    • (1993) Laser Ionization Mass Analysis , pp. 453-504
    • Dietze, H.J.1    Becker, J.S.2
  • 12
    • 3843089400 scopus 로고    scopus 로고
    • Final Chemical Results from the Mars Pathfinder Alpha Proton X-Ray Spectrometer
    • Foley, C. N., Economou, T., and Clayton, R. N., Final Chemical Results from the Mars Pathfinder Alpha Proton X-Ray Spectrometer, J. Geophys. Res., 2003, vol. 108, no. E12, p. 8096. doi: 10. 2029/2002JE002019.
    • (2003) J. Geophys. Res. , vol.108 , Issue.E12 , pp. 8096
    • Foley, C.N.1    Economou, T.2    Clayton, R.N.3
  • 13
    • 49249142895 scopus 로고
    • Time-of-Flight Technique for Particle Identification at Energies from 2-400 keV/Nucleon
    • Gloeckler, G. and Hsieh, K. C., Time-of-Flight Technique for Particle Identification at Energies from 2-400 keV/Nucleon, Nucl. Instrum. Methods Phys. Res., 1979, vol. 165, no. 3, pp. 537-544.
    • (1979) Nucl. Instrum. Methods Phys. Res. , vol.165 , Issue.3 , pp. 537-544
    • Gloeckler, G.1    Hsieh, K.C.2
  • 14
    • 34249721433 scopus 로고    scopus 로고
    • COSAC, The Cometary Sampling and Composition Experiment on Philae
    • Goesmann, F., Rosenbauer, H., Roll, R., et al., COSAC, The Cometary Sampling and Composition Experiment on Philae, Space. Sci. Rev., 2007, vol. 128, pp. 257-280. doi: 10. 1007/s11214-006-9000-6.
    • (2007) Space. Sci. Rev. , vol.128 , pp. 257-280
    • Goesmann, F.1    Rosenbauer, H.2    Roll, R.3
  • 15
    • 67349121287 scopus 로고    scopus 로고
    • The C1XS X-Ray Spectrometer on Chandrayaan-1
    • Grande, M., Maddison, B. J., Howe, C. J., et al., The C1XS X-Ray Spectrometer on Chandrayaan-1, Planet. Space Sci., 2009, vol. 57, pp. 717-724.
    • (2009) Planet. Space Sci. , vol.57 , pp. 717-724
    • Grande, M.1    Maddison, B.J.2    Howe, C.J.3
  • 16
    • 0030418454 scopus 로고    scopus 로고
    • Cassini Orbiter Ion and Neutral Mass Spectrometer Instrument
    • Kasprzak, W. T., Niemann, H., Harpold, D., et al., Cassini Orbiter Ion and Neutral Mass Spectrometer Instrument, SPIE Proc., 1996, vol. 2803, pp. 129-140.
    • (1996) SPIE Proc. , vol.2803 , pp. 129-140
    • Kasprzak, W.T.1    Niemann, H.2    Harpold, D.3
  • 17
    • 77955945854 scopus 로고    scopus 로고
    • Calibrating the ChemCam Laser-Induced Breakdown Spectroscopy Instrument for Carbonate Minerals on Mars
    • Lanza, N. L., Wiens, R. C., Clegg, S. M., et al., Calibrating the ChemCam Laser-Induced Breakdown Spectroscopy Instrument for Carbonate Minerals on Mars, Appl. Opt., 2010, vol. 49, no. 13, pp. C211-C217.
    • (2010) Appl. Opt. , vol.49 , Issue.13
    • Lanza, N.L.1    Wiens, R.C.2    Clegg, S.M.3
  • 20
    • 0033245766 scopus 로고    scopus 로고
    • Quantitative Standard Less Express Analysis of Some Alloys on TOF Mass Spectrometer
    • Managadze, G. G. and Managadze, N. G., Quantitative Standard Less Express Analysis of Some Alloys on TOF Mass Spectrometer, Tech. Phys., 1999, vol. 44, p. 1253.
    • (1999) Tech. Phys. , vol.44 , pp. 1253
    • Managadze, G.G.1    Managadze, N.G.2
  • 21
    • 77957367449 scopus 로고    scopus 로고
    • Study of the Main Geochemical Characteristics of Phobos' Regolith Using Laser Time-of-Flight Mass Spectrometry
    • Managadze, G. G., Wurz, P., Sagdeev, R. Z., et al., Study of the Main Geochemical Characteristics of Phobos' Regolith Using Laser Time-of-Flight Mass Spectrometry, Solar Sys. Res., 2010, vol. 44, no. 5, pp. 376-384.
    • (2010) Solar Sys. Res. , vol.44 , Issue.5 , pp. 376-384
    • Managadze, G.G.1    Wurz, P.2    Sagdeev, R.Z.3
  • 22
  • 23
    • 85007543762 scopus 로고    scopus 로고
    • Development of a Pulsed Ultraviolet Solid-State Laser System for Mars Surface Analysis by Laser Desorption/Ionization Mass Spectroscopy
    • Neumann, J., Ernst, M., Goesmann, F., et al., Development of a Pulsed Ultraviolet Solid-State Laser System for Mars Surface Analysis by Laser Desorption/Ionization Mass Spectroscopy, Proc. European Planetary Sci. Congr., Potsdam, 2009, vol. 4.
    • (2009) Proc. European Planetary Sci. Congr., Potsdam , vol.4
    • Neumann, J.1    Ernst, M.2    Goesmann, F.3
  • 24
    • 0037564963 scopus 로고    scopus 로고
    • The Gas Chromatograph Mass Spectrometer for the Huygens Probe
    • Niemann, H. B., Atreya, S. K., Bauer, S. J., et al., The Gas Chromatograph Mass Spectrometer for the Huygens Probe, Space Sci. Rev., 2002, vol. 104, pp. 553-591.
    • (2002) Space Sci. Rev. , vol.104 , pp. 553-591
    • Niemann, H.B.1    Atreya, S.K.2    Bauer, S.J.3
  • 25
    • 0030707623 scopus 로고    scopus 로고
    • The Chemical Composition of Martian Soil and Rocks Returned by the Mobile Alpha Proton X-Ray Spectrometer: Preliminary Results from the X-Ray Mode
    • Rieder, R., Econoumou, H., Wänke, A., et al., The Chemical Composition of Martian Soil and Rocks Returned by the Mobile Alpha Proton X-Ray Spectrometer: Preliminary Results from the X-Ray Mode, Science, 1997, vol. 278, pp. 1771-1774.
    • (1997) Science , vol.278 , pp. 1771-1774
    • Rieder, R.1    Econoumou, H.2    Wänke, A.3
  • 26
    • 1542319164 scopus 로고    scopus 로고
    • The New Athena Alpha Particle X-Ray Spectrometer for the Mars Exploration Rovers
    • Rieder, R., Gellert, R., Brückner, J., et al., The New Athena Alpha Particle X-Ray Spectrometer for the Mars Exploration Rovers, J. Geophys. Res., 2003, vol. 108, no. E12, p. 8066. doi: 10. 1029/2003JE002150.
    • (2003) J. Geophys. Res. , vol.108 , Issue.E12 , pp. 8066
    • Rieder, R.1    Gellert, R.2    Brückner, J.3
  • 27
    • 78751557919 scopus 로고    scopus 로고
    • Effect of Long Duration UV Irradiation on Diamond-Like Carbon Surfaces in the Presence of a Hydrocarbon Gaseous Atmosphere
    • Riedo, A., Wahlström, P., Scheer, J. A., et al., Effect of Long Duration UV Irradiation on Diamond-Like Carbon Surfaces in the Presence of a Hydrocarbon Gaseous Atmosphere, J. Appl. Phys., 2010, vol. 108, p. 114915. doi: 10. 1063/1. 3517832.
    • (2010) J. Appl. Phys. , vol.108 , pp. 114915
    • Riedo, A.1    Wahlström, P.2    Scheer, J.A.3
  • 28
    • 84869394828 scopus 로고    scopus 로고
    • Isotopic Ratio Measurements by a Miniaturised Laser Ablation Mass Spectrometer Designed for Space Applications
    • Riedo, A., Meier, S., Tulej, M., et al., Isotopic Ratio Measurements by a Miniaturised Laser Ablation Mass Spectrometer Designed for Space Applications, Planet. Space Sci., 2012.
    • (2012) Planet. Space Sci.
    • Riedo, A.1    Meier, S.2    Tulej, M.3
  • 29
    • 0346911473 scopus 로고    scopus 로고
    • A Miniature Laser Ablation Time-of-Flight Mass Spectrometer for in situ Planetary Exploration
    • Rohner, U., Whitby, J., and Wurz, P., A Miniature Laser Ablation Time-of-Flight Mass Spectrometer for in situ Planetary Exploration, Meas. Sci. Technol., 2003, vol. 14, pp. 2159-2164.
    • (2003) Meas. Sci. Technol. , vol.14 , pp. 2159-2164
    • Rohner, U.1    Whitby, J.2    Wurz, P.3
  • 30
    • 3042644431 scopus 로고    scopus 로고
    • A Highly Miniaturised Laser Ablation Time-of-Flight Mass Spectrometer for Planetary Rover
    • Rohner, U., Whitby, J., Wurz, P., and Barabash, S., A Highly Miniaturised Laser Ablation Time-of-Flight Mass Spectrometer for Planetary Rover, Rev. Sci. Instrum., 2004, vol. 75, no. 5, pp. 1314-1322.
    • (2004) Rev. Sci. Instrum. , vol.75 , Issue.5 , pp. 1314-1322
    • Rohner, U.1    Whitby, J.2    Wurz, P.3    Barabash, S.4
  • 31
    • 4243183963 scopus 로고
    • Methods of Remote Surface Chemical Analysis for Asteroid Mission
    • Sagdeev, R. Z., Managadze, G. G., Shutyaev, I. Yu., et al., Methods of Remote Surface Chemical Analysis for Asteroid Mission, Adv. Space Res., 1985, vol. 5, no. 2, pp. 111-120.
    • (1985) Adv. Space Res. , vol.5 , Issue.2 , pp. 111-120
    • Sagdeev, R.Z.1    Managadze, G.G.2    Shutyaev, I.Y.3
  • 32
    • 70450281891 scopus 로고
    • Remote Surface Chemical Analysis Techniques for Small Bodies of the Solar System without Atmosphere
    • C. M. Pieters and P. A. Englert (Eds.), Cambridge: Univ. Press
    • Sagdeev, R. Z., Kissel, J., Managadze, G. G., et al., Remote Surface Chemical Analysis Techniques for Small Bodies of the Solar System without Atmosphere, in Remote Geochemical Analysis: Element and Mineralogical Composition, Pieters, C. M. and Englert, P. A., Eds., Cambridge: Univ. Press, 1993, pp. 569-577.
    • (1993) Remote Geochemical Analysis: Element and Mineralogical Composition , pp. 569-577
    • Sagdeev, R.Z.1    Kissel, J.2    Managadze, G.G.3
  • 33
    • 33644841135 scopus 로고    scopus 로고
    • A Novel Principle for an Ion Mirror Design in Time-of-Flight Mass Spectrometry
    • Scherer, S., Altwegg, K., Balsiger, H., et al., A Novel Principle for an Ion Mirror Design in Time-of-Flight Mass Spectrometry, Int. J. Mass Spectr., 2006, vol. 251, pp. 73-81.
    • (2006) Int. J. Mass Spectr. , vol.251 , pp. 73-81
    • Scherer, S.1    Altwegg, K.2    Balsiger, H.3
  • 34
    • 78650274995 scopus 로고    scopus 로고
    • The Influence of Spacecraft Outgasing on the Exploration of Tenuous Atmospheres with in situ Mass Spectrometry
    • Schläppi, B., Altwegg, K., Balsiger, H., et al., The Influence of Spacecraft Outgasing on the Exploration of Tenuous Atmospheres with in situ Mass Spectrometry, J. Geophys. Res., 2010, vol. 115, p. A12313. doi: 10. 10. 29/2010JA015734.
    • (2010) J. Geophys. Res. , vol.115
    • Schläppi, B.1    Altwegg, K.2    Balsiger, H.3
  • 35
    • 0030497640 scopus 로고    scopus 로고
    • Sulfur Isotopic Systematics in Alteration Assemblages in Martian Meteorite Allan Hills 84001
    • Shearer, C. K., Layne, G. D., Papike, J. J., and Spilde, M. N., Sulfur Isotopic Systematics in Alteration Assemblages in Martian Meteorite Allan Hills 84001, Geochim. Cosmochim. Acta, 1996, vol. 60, no. 15, pp. 2921-2926.
    • (1996) Geochim. Cosmochim. Acta , vol.60 , Issue.15 , pp. 2921-2926
    • Shearer, C.K.1    Layne, G.D.2    Papike, J.J.3    Spilde, M.N.4
  • 36
    • 0002980914 scopus 로고
    • The Martian Impact Cratering Record
    • Kieffer, H. H., Jakosky, B. M., Snyder, C. W., and Matthews, M. S., Eds., Arizona Press
    • Strom, R. G., Croft, S. K., and Barlow, N. G., The Martian Impact Cratering Record, in Mars, Kieffer, H. H., Jakosky, B. M., Snyder, C. W., and Matthews, M. S., Eds., Arizona Press, 1992, pp. 383-423.
    • (1992) Mars , pp. 383-423
    • Strom, R.G.1    Croft, S.K.2    Barlow, N.G.3
  • 37
    • 0020090611 scopus 로고
    • Detection Efficiency of a Heavy Ion Time-of-Flight Spectrometer with Thin Carbon Foils in the Start Detector
    • Stüdemann, W. and Wilken, B., Detection Efficiency of a Heavy Ion Time-of-Flight Spectrometer with Thin Carbon Foils in the Start Detector, Rev. Sci. Instrum., 1982, vol. 53, pp. 175-180. doi: 10. 1063/1. 1136948.
    • (1982) Rev. Sci. Instrum. , vol.53 , pp. 175-180
    • Stüdemann, W.1    Wilken, B.2
  • 38
    • 0012765116 scopus 로고
    • Isotopic Analysis of Evolved Gases
    • Meyer, C., Treiman, A. H., and Kostiuk, T., Eds., LPI Tech. Rep
    • Swindle, T. D., Boynton, W. V., Chutjian, A., et al., Isotopic Analysis of Evolved Gases, in Planetary Surface Instruments Workshop, Meyer, C., Treiman, A. H., and Kostiuk, T., Eds., LPI Tech. Rep., no. 95-05, 1995, pp. 21-40.
    • (1995) Planetary Surface Instruments Workshop , Issue.5-95 , pp. 21-40
    • Swindle, T.D.1    Boynton, W.V.2    Chutjian, A.3
  • 40
    • 0000697634 scopus 로고
    • Global Stratigraphys
    • Kieffer, H. H., Jakosky, B. M., Snyder, C. W., and Matthews, M. S., Eds., Arizona Press
    • Tanaka, K. L., Scott, D. H., and Greeley, R., Global Stratigraphys, in Mars, Kieffer, H. H., Jakosky, B. M., Snyder, C. W., and Matthews, M. S., Eds., Arizona Press, 1992, pp. 345-382.
    • (1992) Mars , pp. 345-382
    • Tanaka, K.L.1    Scott, D.H.2    Greeley, R.3
  • 41
    • 77953285256 scopus 로고    scopus 로고
    • VAPoR-Volatile Analysis by Pyrolysis of Regolith-An Instrument for in situ Detection of Water, Noble Gases and Organics on the Moon
    • ten Kate, I. L., Cardiff, E. H., Dworkin, J. P., et al., VAPoR-Volatile Analysis by Pyrolysis of Regolith-An Instrument for in situ Detection of Water, Noble Gases and Organics on the Moon, Planet. Space Sci., 2010, vol. 58, pp. 1007-1017.
    • (2010) Planet. Space Sci. , vol.58 , pp. 1007-1017
    • ten Kate, I.L.1    Cardiff, E.H.2    Dworkin, J.P.3
  • 42
    • 84869456664 scopus 로고
    • Summary of Report
    • Meyer, C., Treiman, A. H., and Kostiuk, T., Eds., LPI Tech. Rep
    • Treiman, A. and Meyer, C., Summary of Report, in Planetary Surface Instruments Workshop, Meyer, C., Treiman, A. H., and Kostiuk, T., Eds., LPI Tech. Rep., no. 95-05, 1995, pp. 1-3.
    • (1995) Planetary Surface Instruments Workshop , Issue.5-95 , pp. 1-3
    • Treiman, A.1    Meyer, C.2
  • 43
    • 79951720558 scopus 로고    scopus 로고
    • A Miniature Mass Analyzer for in situ Elemental Analysis of Planetary Material: Performance Studies
    • Tulej, M., Iakovleva, M., Leya, I., and Wurz, P., A Miniature Mass Analyzer for in situ Elemental Analysis of Planetary Material: Performance Studies, Anal. Bioanal. Chem., 2011, vol. 399, pp. 2185-2200. doi: 10. 1007/s00216-010-4411-3.
    • (2011) Anal. Bioanal. Chem. , vol.399 , pp. 2185-2200
    • Tulej, M.1    Iakovleva, M.2    Leya, I.3    Wurz, P.4
  • 44
    • 84872299651 scopus 로고    scopus 로고
    • On Applicability of a Miniaturized Laser Ablation Time of Flight Mass Spectrometer for Measurements of Trace Elements
    • doi: 10. 1155/2012/234949
    • Tulej, M., Riedo, A., Iakovleva, M., and Wurz, P., On Applicability of a Miniaturized Laser Ablation Time of Flight Mass Spectrometer for Measurements of Trace Elements, Int. J. Spectrosc., 2012. doi: 10. 1155/2012/234949.
    • (2012) Int. J. Spectrosc.
    • Tulej, M.1    Riedo, A.2    Iakovleva, M.3    Wurz, P.4
  • 46
    • 20144387813 scopus 로고    scopus 로고
    • The Cassini Ion and Neutral Mass Spectrometer (INMS) Investigation
    • Waite, J. H., Jr., Lewis, W. S., Kasprzak, W. T., et al., The Cassini Ion and Neutral Mass Spectrometer (INMS) Investigation, Space Sci. Rev., 2004, vol. 114, pp. 113-231.
    • (2004) Space Sci. Rev. , vol.114 , pp. 113-231
    • Waite Jr., J.H.1    Lewis, W.S.2    Kasprzak, W.T.3
  • 47
    • 67649400364 scopus 로고    scopus 로고
    • The Mars Environment Analogue Platform Long Duration Balloon Flight
    • Wieser, M., Barabash, S., Hedqvist, T., et al., The Mars Environment Analogue Platform Long Duration Balloon Flight, Adv. Space Res., 2009, vol. 44, pp. 308-312.
    • (2009) Adv. Space Res. , vol.44 , pp. 308-312
    • Wieser, M.1    Barabash, S.2    Hedqvist, T.3
  • 48
    • 77949319392 scopus 로고    scopus 로고
    • Review of Instruments
    • Wüest, M., Evans, D. S., and von Steiger, R., Eds., ESA Commun., ISSI Sci. Rep. SR-007
    • Wüest, M., Evans, D. S., McFadden, J. P., et al., Review of Instruments, in Calibration of Particle Instruments in Space Physics, Wüest, M., Evans, D. S., and von Steiger, R., Eds., ESA Commun., ISSI Sci. Rep. SR-007, 2007, pp. 11-116.
    • (2007) Calibration of Particle Instruments in Space Physics , pp. 11-116
    • Wüest, M.1    Evans, D.S.2    McFadden, J.P.3
  • 50
    • 77956609642 scopus 로고    scopus 로고
    • The Contribution to Mercury's Exosphere by Sputtering, Micrometeorite Impact and Photon-Stimulated Desorption
    • Wurz, P., Whitby, J. A., Rohner, U., et al., The Contribution to Mercury's Exosphere by Sputtering, Micrometeorite Impact and Photon-Stimulated Desorption, Planet. Space Sci., 2010, vol. 58, pp. 1599-1616.
    • (2010) Planet. Space Sci. , vol.58 , pp. 1599-1616
    • Wurz, P.1    Whitby, J.A.2    Rohner, U.3
  • 51
    • 77956609642 scopus 로고    scopus 로고
    • Corrigendum to "Self-Consistent Modeling of Mercury's Exosphere by Sputtering, Micrometeorite Impact and Photon-Stimulated Desorption"
    • doi: 10. 1016/j. pss. 2010. 09. 015
    • Wurz, P., et al., Corrigendum to "Self-Consistent Modeling of Mercury's Exosphere by Sputtering, Micrometeorite Impact and Photon-Stimulated Desorption", Planet. Space Sci., 2010. doi: 10. 1016/j. pss. 2010. 09. 015.
    • (2010) Planet. Space Sci
    • Wurz, P.1


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