Publications for Don Douglas:
"Ion cloud model for a linear quadrupole ion trap", D. J. Douglas and N. V. Konenkov, European Journal of Mass Spectrometry, 18, 419-429 (2012)
"Trajectory calculations of space-charge-induced mass shifts in a linear quadrupole ion trap", D. J. Douglas and N. V. Konenkov, Rapid Communications in Mass Spectrometry, 26, 2105-2114 (2012)
"Solution and gas-phase H/D exchange of protein-small-molecule complexes: cex and its inhibitors", Y. Kang, P. Terrier, C. Ding, and D. J. Doulgas, Journal of the American Society for Mass Spectroscopy, 23, 57-67 (2012)
"Space-charge effects with mass-selective axial ejection from a linear quadrupole ion trap", H. Qiao, C. Gao, D. Mao, N. Konenkov, and D. J. Douglas, Rapid Communications in Mass Spectrometry, 25, 3509-3520 (2011)
"Gas-Phase Ions of Human Hemoglobin A, F, and S ", Yang Kang and D. J. Douglas , Journal of the American Society for Mass Spectrometry 22 , 1187-1196 (2011).
"Mass Spectra and Ion Collision Cross Sections of Hemoglobin", Yang Kang, Peran Terrier, and D. J. Douglas , Journal of the American Society for Mass Spectrometry 22 , 290-299 (2011).
"Carbamino Group Formation with Peptides and Proteins Studied by Mass Spectrometry", Peran Terrier and D. J. Douglas , Journal of the American Society for Mass Spectrometry 21 , 1500-1505 (2010).
"Spatial Harmonics of Linear Multipoles with Round Electrodes", A. N. Konenkov, D. J. Douglas and N. V. Konenkov , International Journal of Mass Spectrometry 289 , 144-149 (2010).
"Mass Analysis with Islands of Stability with Linear Quadrupoles Incorporating Higher Order Multipole Fields ", XianZhen Zhao, Zilan Xiao and D. J. Douglas , Journal of the American Society for Mass Spectrometry 21 , 398-402 (2010).
"Quadrupole Mass Filters with Added Hexapole Fields", Zilan Xiao, XianZhen Zhao and D. J. Douglas , Rapid Communications in Mass Spectrometry 24 , 1985-1992 (2010).
"Gas-Phase H/D Exchange and Collision Cross Sections of Hemoglobin Monomers, Dimers and Tetramers", P. John Wright and D. J. Douglas , Journal of the American Society for Mass Spectrometry 20 , 484-495 (2009).
"Overcoming Field Imperfections of Quadrupole Mass Filters with Mass Analysis in Islands of Stability", XianZhen Zhao, Zilan Xiao, and D. J. Douglas , Analytical Chemistry 81 , 5806-5811 (2009).
"Linear Quadrupoles in Mass Spectrometry", D. J. Douglas , Mass Spectrometry Reviews 28 , 937-960 (2009).
"Quadrupole Excitation of Ions in Linear Radio Frequency Quadrupole Ion Traps with Added Octopole Fields", XianZhen Zhao, Ori Granot and D. J. Douglas , Journal of the American Society for Mass Spectrometry 19 , 510-519 (2008).
"Conformations of Gas-Phase Ions of Ubiquitin, Cytochrome c, Apomyoglobin, and beta-Lactoglobulin Produced from Two Different Solution Conformations", P. John Wright, Jianmin Zhang and D. J. Douglas , Journal of the American Society for Mass Spectrometry 20 , 1906-1913 (2008).
"Dipole Excitation of Ions in Linear Quadrupole Ion Traps with Added Multipole Fields", XianZhen Zhao, Ori Granot, and D. J. Douglas , International Journal of Mass Spectrometry 19 , 510-519 (2008).
"Mass Selective Axial Ejection from Linear Quadrupoles with Added Octopole Fields", Annie Moradian and D. J. Douglas , Journal of the American Society for Mass Spectrometry 19 , 270-280 (2008).
"Experimental Investigation of Mass Analysis Uing Islands of Stability with a Quadrupole with a 2.0% Added Octopole Field", Annie Moradian and D. J. Douglas , Rapid Communications in Mass Spectrometry 21 , 3306 (2007).
"Mass Analysis in Islands of Stability with Linear Quadrupoles with Added Octopole Fields", Nikolai Konenkov, XianZhen Zhao, Zilan Xiao, D.J. Douglas , Journal of the American Society for Mass Spectrometry 18 , 826 (2007).
"Gas Phase Noncovalent Protein Complexes that Retain Solution Binding Properties: Binding of Xylobiose Inhibitors to the beta-1,4 Exoglucanase from Cellulomonas Fimi", Milica Tesic, Jacqueline Wicki, David K. Y. Poon, Stephen Withers, Donald J. Douglas , Journal of the American Society for Mass Spectrometry 18 , 64 (2007).
"Linear Quadrupoles with Added Hexapole Fields", Nikolai Konenkov, Frank Londry, Chuanfan Ding and D. J. Douglas , Journal of the American Society for Mass Spectrometry 17 , 1063 (2006).
"Coulomb Effects in Binding of Heme in Gas Phase Ions of Myoglobin", Kevin J. Mark and D. J. Douglas , Rapid Communications in Mass Spectrometry 20 , 111 (2006).
"Ion Excitation in a Linear Quadrupole Ion Trap with an Added Octopole Field", Anthony Michaud, Aaron Frank, Chuanfan Ding, XianZhen Zhao and D. J. Douglas , Journal of the American Society for Mass Spectrometry 16 , 835 (2005).
"Linear Ion Traps in Mass Spectrometry", D. J. Douglas, Aaron J. Frank, and Dunmin Mao , Mass Spectrometry Reviews 24 , 1 (2005).
"Quadrupole Mass Filters with Octopole Fields", Chuanfan Ding, N. V. Konenkov and D. J. Douglas , Rapid Communications in Mass Spectrometry 17 , 2495 (2003).
"Linear Quadrupoles with Added Octopole Fields", M. Sudakov and D. J. Douglas , Rapid Communications in Mass Spectrometry 17 , 2290 (2003).
"Conformations of Gas Phase Lysozyme Ions Formed from Two Different Solution Folding States", Dunmin Mao, Kodali Ravindra Babu, Yu-Luan Chen and D. J. Douglas , Anal. Chem. 75 , 1225 (2003).
"H/D Exchange of Gas Phase Bradykinin Ions in a Linear Quadrupole Ion Trap", Dunmin Mao and D. J. Douglas , J. Am. Soc. Mass Spectrom. 14 , 85 (2003).
"H/D Exchange of Myoglobin Ions in a Linear Quadrupole Ion Trap", Dunmin Mao, Chuanfan Ding and D. J. Douglas , Rapid Communications in Mass Spectrometry 16 , 1941 (2002).
"A Multiple Sprayer System for High-Throughput Electrospray Ionization Mass Spectrometry", Bradley Schneider, D. J. Douglas and David D. Y. Chen , Rapid Communications in Mass Spectrometry 16 , 1982 (2002).
"Influence of the 6th and 10th Spatial Harmonics on the Peak Shape of a Quadrupole Mass Filter with Round Rods", D. J. Douglas and N. V. Konenkov , Rapid Communications in Mass Spectrometry 16 , 1425 (2002).
"An Atmospheric Pressure Ion Lens That Improves Nebulizer Assisted Ion Sources", Bradley B. Schneider, D. J. Douglas and David D. Y. Chen, , J. Am. Soc. Mass Spectrom., 13 , 906 (2002).
"Matrix Methods to Calculate Stability Diagrams in Quadrupole Mass Spectrometry(invited "Account and Perspective").", N. V. Konenkov, M. Sudakov, and D. J. Douglas , J. Am. Soc. Mass Spectrom. 13 , 597 (2002).
"High Intensity Ion Beams from an Atmospheric Pressure Inductively Coupled Plasma", S. Al. Moussalami and D. J. Douglas , Rev. Sci. Instruments 73 , 884 (2002).
"Collision Cross Sections of Gas Phase DNA Ions", Annie Moradian, Mark Scalf, Mike Westphall, Lloyd Smith and D. J. Douglas, , The International Journal of Mass Spectrometry 219 , 161 (2002).
"Tandem Mass Spectrometry of Protein-Protein Complexes: Cytochrome c-Cytochrome b5", Yu-Luan Chen, M. R. Mauk, A. G. Mauk and D. J. Douglas , J. Am. Soc. Mass Spectrom. 13 , 59 (2002).
"Mass Spectrometer Including Multiple Mass Analysis Stages and Method of Operation to Give Improved Resolution ", D. J. Douglas, Zhaohui Du and B. A. Collings US patent 6,191,417, February 20 (2001).
"Reaction of Human Myoglobin and Peroxynitrite: Characterizing Biomarkers for Myoglobin-Derived Oxidative Stress", Paul K. Witting, A. Grant Mauk, D. J. Douglas and Roland Stocker , Biochem. Biophys. Research Commun 286 , 352 (2001).
"An Ion lens to Improve Electrospray Ionization at Low Solution Flow Rates", Bradley B Schneider, D. J. Douglas and David D. Y. Chen , Rapid Communications in Mass Spectrometry 15 , 2168 (2001).
"A Combined Linear Ion Trap Time-of-Flight System with Improved Performance and MSn Capabilities", B. A. Collings, J. M. Campbell, Dunmin Mao and D. J. Douglas , Rapid Communications in Mass Spectrometry 15 , 1777 (2001).
"Collision-Induced Dissociation of Bradykinin Ions in the Interface Region of an ESI-MS", Bradley B. Schneider, D. J. Douglas and David D. Y. Chen , J. Am. Soc. Mass Spectrom 12 , 772 (2001).
"Ion Fragmentation in an Electrospray Ionization-Mass Spectrometer Interface with Different Gases", Bradley B. Schneider, D. J. Douglas, and David D. Y. Chen , Rapid Communications in Mass Spectrometry 15 , 249 (2001).
"The Methanol-Induced Conformational Transitions of ?-Lactoglobulin, Cytochrome c and Ubiquitin at Low pH: A Study by Electrospray Ionization Mass Spectrometry", Kodali Ravindra Babu and D. J. Douglas , J. Am. Soc. Mass Spectrom., 12 , 317 (2001).
"Reaction of Human Myoglobin and Nitric Oxide Heme Iron- or Protein Sulfhydryl (s)-Nitrosation depends on the Absence or Presence of Oxygen", Paul K. Witting, D. J. Douglas and A. G. Mauk , The Journal of Biological Chemistry 276 , 3991 (2001).
"Reaction of Human Myoglobin and Nitric Oxide Yields a Heme Iron-or Sulfhydryl (s)-nitrosated Protein Dependent on the Oxidation State of Iron and the Absence or Presence of Oxygen", Paul K. Witting, D. J. Douglas and A. G. Mauk , J. Biol. Chem. 276 , 3991 (2001).
"The Methanol-Induced Conformational Transisitions of beta-Lactoglobulin, Cytochrome c and Ubiquitin at Low pH: A Study by Electrospray Ionization Mass Spectrometry", Kodali Ravindra Babu and D. J. Douglas , J. Am. Soc. Mass Spectrom. 12 , 317 (2001).
"Collision-Induced Dissociation of Bradykinin Ions in the Interface Region of an ESI-MS", Bradley B. Schneider, D. J. Douglas and David D. Y. Chen , J. Am. Soc. Mass Spectrom. 12 , in press (2001).
"Ion Fragmentation in an Electrospray Ionization Mass Spectrometer Interface with Different Gases", Bradley B. Schneider, D. J. Douglas and David D. Y. Chen , Rap. Commun. Mass Spectrom. 15 , 249 (2001).
"Method and Apparatus for Determining the Kinetics of Solution Reactions by Mass Spectrometry", D. J. Douglas, B. A. Collings and L. Konermann US patent 6,054,709 , April (2000).
"Methanol-Induced Conformations of Myoglobin at pH 4.0", Kodali Ravindra Babu and D. J. Douglas , Biochemistry 39 , 14702 (2000).
"An Interface with a Linear Quadrupole Ion Guide for an Electrospray-Ion Trap Mass Spectrometer System, Byungchul Cha, Michael Blades and D. J. Douglas", Byungchul Cha, Michael Blades and D. J. Douglas , Anal. Chem., 72 , 5647 (2000).
"Observation of Higher Order Quadrupole Excitation Frequencies in a Linear Ion Trap", B. A. Collings and D. J. Douglas , J. Am. Soc. Mass Spectrom., 11 , 1016 (2000).
"High Resolution Mass Spectrometry with a Quarupole Operated in the Fourth Stability Region", Wei Chen, B. A. Collings and D. J. Douglas , Anal. Chem. 72 , 540 (2000).
"Biochemical Characterization of the Reaction of Recombinant Human Myoglobin and H2O2: A role for the Thiyl Radical Produced at Cysteine 110", Paul K. Witting, D. J. Douglas and A. G. Mauk , J. Biol. Chem. 275 , 20391 (2000).
"A New Interface with a Linear Quadrupole Ion Guide for an Electrospray-Ion Trap Mass Spectrometer System", Byungchul Cha, Michael Blades and D. J. Douglas , Anal. Chem. 72 , 5647 (2000).
"Methanol-Induced Conformations of Myoglobin at pH 4.0", Kodali Ravindra Babu and D. J. Douglas , Biochemistry 39 , 14702 (2000).
"Observation of Higher Order Quadrupole Excitation Frequencies in a Linear Ion Trap", B. A. Collings and D. J. Douglas , J. Am. Soc. Mass Spectrom. 11 , 1016 (2000).
"Peak Structure with a Quadrupole Mass Filter Operated in the Third Stability Region", Zhaohui Du, N. V. Konenkov and D. J. Douglas , Int. J. Mass Spectrom. 197 , 113 (2000).
"Excitation Frequencies of Ions Confined in a Quadrupole Field with Quadrupole Excitation", M. Sudakov, N. Konenkov, D. J. Douglas, T. Glebova , J. Am. Soc. Mass Spectrom. 11 , 10-18 (2000).
"High Resolution Mass Spectrometry with a Quadrupole Operated in the Fourth Stability Region", Wei Chen, B. A. Collings and D. J. Douglas , Anal. Chem. 72 , 540-545 (2000).
"Peak Splitting with a Quadrupole Mass Filter Operated in the Second Stability Region", Zhaohui Du, D. J. Douglas and N. V. Konenkov , J. Am. Soc. Mass Spectrom. 10 , 1263-1270 (1999).
"Elemental Analysis with Quadrupole Mass Filters Operated in Higher Stability Regions", Zhaohui Du, D. J. Douglas and N. V. Konenkov , J. Anal. Atom. Spectrom. 14 , 1111-1119 (1999).
"A Novel Tandem Quadrupole Mass Analyzer", Zhaohui Du and D. J. Douglas , J. Am. Soc. Mass Spectrom. 10 , 1053-1055 (1999).
"Gas Dynamics of the ICP-MS Interface: Impact Pressure Probe Measurements of Gas Flow Profiles", Wei Chen, Terry Olney and D. J. Douglas , J. Anal. Atom. Spectrom. 14 , 9 (1999).
"Conformation of Native, Reduced and [5-55] Ala Bovine Pancreatic Trypsin Inhibitor in the Gas Phase", V. Nesati, Y-L Chen, B. A. Collings and D. J. Douglas , Rapid Commun. Mass Spectrom. 12 , 40 (1998).
"Unfolding of Proteins Monitored by Electrospray Ionization Mass Spectrometry: A Comparison of Positive and Negative Ion Modes", Lars Konermann and D. J. Douglas , J. Am. Soc. Mass Spectrom. 9 , 1248 (1998).
"Equilibrium Unfolding of Proteins Monitored by Electrospray Ionization Mass Spectrometry: Distinguishing Two State from Multi-State Transitions", L. Konermann and D. J. Douglas , Rapid Commun. Mass Spectrom. 12 , 435 (1998).
"Stability of a Highly Charged Noncovalent Complex: Holomyoglobin", Y. L. Chen, J. Campbell, B. A. Collings Lars Konermann and D. J. Douglas , Rapid Commun. Mass Spectrom. 12 , 1003 (1998).
"A Linear Ion Trap Time of Flight System with MS/MS Capabilities", Jennifer Campbell, B. A. Collings and D. J. Douglas , Rapid. Commun. Mass Spectrom. 12 , 1463 (1998).
"Pre-Steady State Kinetic Analysis of an Enzymatic Reaction Monitored by Time-Resolved Electrospray Ionization Mass Spectrometry", David L. Zechel, Lars Konermann, Stephen G. Withers and D. J. Douglas , Biochemistry 37 , 7664 (1998).
"Ion Source Emittance Influence on the Transmission of a Quadrupole Operated in the Second Stability Region", D. J. Douglas and N. Konenkov , J. Am. Soc. Mass Spectrom. 9 , 1074 (1998).
"Acid Induced Unfolding of Cytochrome c at Different Methanol Concentrations: Electrospray Ionization Mass Spectrometry Specifically Monitors Changes in Tertiary Structure", L. Konermann and D. J. Douglas , Biochemistry 36 , 12296 (1997).
"Collision Cross Sections of Myoglobin and Cytochrome c Ions with Ne, Ar, Kr", Y-L. Chen, B. A. Collings and D. J. Douglas , J. Am. Soc. Mass Spectrom. 8 , 681 (1997).
"Cytochrome c Folding Kinetics Studied by Time Resolved Electrospray Ionization Mass Spectrometry", L. Konermann, B. A. Collings and D. J. Douglas , Biochemistry 36 , 5554 (1997).
"Dissociation of Heme from Myoglobin and Cytochrome b5: Comparison of Behavior in Solution and in the Gas Phase", C. L. Hunter, A. G. Mauk and D. J. Douglas , Biochemistry 36 , 1018 (1997).
"Acid Induced Denaturation of Myoglobin Studied by Time Resolved Electrospray Mass Spectrometry", L. Konermann, F. I. Rosell, A. G. Mauk and D. J. Douglas , Biochemistry 36 , 6448 (1997).
"An Extended Mass Range Quadrupole for Electrospray Mass Spectrometry", B. A. Collings and D. J. Douglas , Int. J. Mass Spec. Ion Proc. 162 , 121 (1997).
"Inductively Coupled Plasma Mass Spectrometry with a Quadrupole Operated in the Third Stability Region", Z. Du, T. N. Olney and D. J. Douglas , J. Am. Soc. Mass Spectrom. 8 , 1230 (1997).
"Method of Plasma Analysis with Reduced Space Charge Effects", L. Cousins, D. J. Douglas and S. D. Tanner U.S. patent 5,565,679, October (1996).
"Conformation of Gas Phase Myoglobin Ions", B. A. Collings and D. J.Douglas , J. Am. Chem. Soc. 118 , 4488 (1996).
"High Resolution ICP Mass Spectra with a Quadrupole Mass Filter", Ji-Feng Ying and D. J. Douglas , Rapid Communications in Mass Spectrometry 10 , 649 (1996).
"Method for Increased Resolution in Tandem Mass Spectrometry", D. J. Douglas, J. Corr, B. Thomson and J. Hager U.S. patent 5,248,875, (1993).
"Multipole Inlet System for Ion Traps", D. J. Douglas U.S. Patent 5,179,278, (1993).
"Collision Cross Sections for Protein Ions", T. Covey and D. J. Douglas , J. Am. Soc. Mass Spectrom. 4 , 616-623 (1993).
"Collisional Focusing Effects in Radio Frequency Quadrupoles", D. J. Douglas and J. B. French , J. Am. Soc. Mass Spectrom. 3 , 398-408 (1992).
"Mass Spectrometer and Method with Improved Ion Transmission", D. J. Douglas and J. B. French U.S. Patent 4,963,736, , (1990).
"Mass Analyzer System with Reduced Drift", , J. B. French, D. J. Douglas, J. E. Fulford and P. A. Arrowsmith U.S. Patent 4,746,794, (1988).
"Method and Apparatus for Sampling a Plasma Into a Vacuum Chamber, , ", D. J. Douglas U.S. Patent 4,501,965, (1985).
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