个人简介

Ph.D., Indiana University

研究领域

Analytical chemistry

Research interests in the development of novel gas-phase separations techniques that can be combined with mass spectrometry (MS). This work is centered on the technique known as ion mobility spectrometry (IMS). - See more at: http://chemistry.wvu.edu/faculty-staff/faculty/stephen-valentine#sthash.yep76IBE.dpuf

近期论文

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Gaye, M. M.; Valentine, S. J.; Hu, Y.; Mirjankar, N.; Hammoud, Z. T.; Mechref, Y.; Lavine, B. K.; Clemmer, D. E. “Ion Mobility-Mass Spectrometry Analysis of Serum N-Linked Glycans from Esophageal Adenocarcinoma Phenotypes”, J. Prot. Res. 2012, dx.doi.org/10.1021/pr300756e. Zhu, F.; Lee, S.; Valentine, S. J.; Reilly, J. P.; Clemmer, D. E. “Mannose7 Glycan Isomer Characterization by IMS-MS/MS Analysis”, J. Am. Soc. Mass Spectrom. 2012, DOI: 10.1007/s13361-012-0491-y Atlasevich, N.; Holliday, A.; Valentine, S. J.; Clemmer, D. E., “Chirality and Packing in Small Proline Clusters”, J. Phys. Chem. B 2012, 116, 11442-11446. Dilger, J. M.; Valentine, S. J.; Glover, M. S.; Ewing, M. A.; Clemmer, D. E. “A Database of Alkali Metal-Containing Peptide Cross Sections: Influence of Metals on Size Parameters for Specific Amino Acids”, Int. J. Mass Spectrom. 2012, (Special Issue in honor of Peter Armentrout’s 60th birthday), 330-332, 35-45. Holliday, A.; Atlasevich, N.; Myung, S.; Plasencia, M. D.; Valentine, S. J.; Clemmer, D. E. “Oscillations for Chiral Preference in Proline Clusters”, J. Phys. Chem. A. 2012, dx.doi.org/10.1021/jp302677n. Atlasevich, N.; Holliday, A.; Valentine, S. J.; Clemmer, D. E. “Collisional Activation of [14Pro+2H]2+ Clusters: Chiral Dependence of Evaporation and Fission Processes”, J. Phys. Chem. B. 2012, 116, 7644-7651. Lee, S.; Julian, R. R.; Valentine, S. J.; Reilly, J. P., Clemmer, D. E. “Biomolecular condensation via ultraviolet excitation in vacuo”, Int. J. Mass Spectrom. 2012, 316-318, 6-11. Shi, H.; Pierson, N.; Valentine, S.; Clemmer, D.E. “Conformation Types of Ubiquitin [M+8H]8+ Ions from Water: Methanol Solutions: Evidence for the N and A States in Aqueous Solution”, J. Phys. Chem. B 2012, 116, 3344-3352. Lee, S.; Valentine, S.J.; Reilly, J.P.; Clemmer, D.E. “Analyzing a Mixture of Disaccharides by IMS-VUVPD-MS”, Int. J. Mass Spectrom. 2012, 309, 161-167. Lee, S.; Valentine, S.J.; Zucker, S.M.; Webber, N.; Reilly, J.P.; Clemmer, D.E. “Extracted Fragment Ion Mobility Distributions: A New Method for Complex Mixture Analysis”, Int. J. Mass Spectrom. 2012, 309, 154-160. Lee, S.; Valentine, S.J.; Reilly, J.P.; and Clemmer, D.E. “Controlled Formation of Peptide Bonds in the Gas-Phase”, J. Am. Chem. Soc. 2011, 133(40), 15834-15837. Zucker, S.M.; Lee, S.; Webber, N.; Valentine, S.J.; Reilly, J.P. and Clemmer, D.E. “An Ion Mobility/Ion Trap/Photodissociation Instrument for Characterization of Ion Structure”, J. Am. Soc. Mass Spectrom. 2011, DOI: 10.1007/s13361-011-0179-8. Kurulugama, R. T.; Nachtigall, F. M.; Valentine, S. J.; Clemmer, D.E. “Overtone Mobility Spectrometry: Part 4. OMS-OMS Analyses of Complex Mixtures” J. Am. Soc. Mass Spectrom. 2011, 22, 2049-2060. Pierson, N.A.; Chen, L.; Valentine, S.J.; Russell, D.H.; Clemmer, D.E. “Number of Solution States of Bradykinin from Ion Mobility and Mass Spectrometry Measurements” J. Am. Chem. Soc. 2011, 133 (35), 13810-13813. Valentine, S.J.; Ewing, M.; Dilger, J.M.; Glover, M.; Geromanos, S.; Hughes, C.; Clemmer, D.E. Using Ion Mobility Data to Improve Peptide Identification: Cross Section Databases and Intrinsic Amino Acid Size Parameters. J. Proteome Res. 2011, 10(5), 2318-2329. Valentine, S.J.; Kurulugama, R.T.; Clemmer, D. E. “Overtone Mobility Spectrometry: Part 3. On the Origin of Peaks”, J. Am. Soc. Mass Spectrom. 2011, 22(5), 804-16. Li, Z.; Valentine, S.J.; Clemmer, D.E. “Complexation of Amino Compounds by 18C6 Improves Selectivity by IMS-IMS-MS: Application to Petroleum Characterization”, J Am. Soc. Mass Spectrom. 2011, 22(5), 817-27. Kim, T.-Y.; Valentine, S. J.; Clemmer, D. E.; Reilly, J. P. “Gas-Phase Conformation-Specific Photofragmentation of Proline-Containing Peptide Ions”, J. Am. Soc. Mass Spectrom. 2010, 21(8), 1455-1465. Glaskin, R. S.; Valentine, S. J.; Clemmer, D. E. “A Scanning Frequency Mode for Ion Cyclotron Mobility Spectrometry”, Anal. Chem. 2010, 82(19), 8266-8271. Lee, S.; Ewing, M. A.; Nachtigall, F. M.; Kurulugama, R. T.; Valentine, S. J.; Clemmer, D. E. “Determination of Cross Sections by Overtone Mobility Spectrometry: Evidence for Loss of Unstable Structures at Higher Overtones”, J. Phys. Chem. B 2010, 114(38), 12406-12415.