Search Results - "Collings, B. A."

Cytochrome c Folding Kinetics Studied by Time-Resolved Electrospray Ionization Mass Spectrometry by Konermann, L, Collings, B. A, Douglas, D. J

“…A new method for studying the folding kinetics of proteins is described. The method combines a continuous flow mixing technique with an electrospray mass…”
Get full text

Increased Fragmentation Efficiency of Ions in a Low Pressure Linear Ion Trap with an Added dc Octopole Field by Collings, B.A.

“…In-trap fragmentation of ions in a hybrid linear ion trap triple quadrupole mass spectrometer occurs at pressures about 5e-5 torr. At these low pressures,…”
Get full text

Resonant excitation in a low-pressure linear ion trap by Collings, B.A, Stott, W.R, Londry, F.A

“…It has been shown that through the process of resonant excitation the fragmentation of ions confined in a low-pressure (<0.05 mTorr) linear ion trap (LIT) can…”
Get full text

Collision cross sections of myoglobin and cytochrome c ions with Ne, Ar, and Kr by Chen, Yu-Luan, Collings, B.A., Douglas, D.J.

“…The energy losses of ions of myoglobin and cytochrome c in collisions with Ne, Ar, and Kr have been measured with a triple quadrupole mass spectrometer system…”
Get full text

High-resolution excitation of ions in a low-pressure linear ion trap by Collings, B. A.

“…An exploration of the parameters necessary to obtain high‐resolution excitation, using dipolar excitation, of an ion in a linear ion trap has been undertaken…”
Get full text

Conformation of Gas-Phase Myoglobin Ions by Collings, B. A, Douglas, D. J

Get full text

Observation of higher order quadrupole excitation frequencies in a linear ion trap by Collings, B.A, Douglas, D.J

“…The resonant frequencies for quadrupole excitation of ions confined with a buffer gas in a linear quadrupole ion trap with Mathieu parameters a = 0 and q ≈…”
Get full text

High-Resolution Mass Spectrometry with a Quadrupole Operated in the Fourth Stability Region by Chen, Wei, Collings, B. A, Douglas, D. J

“…The properties of a quadrupole mass filter operated in the fourth stability region with Mathieu parameters (a,q) = (2 × 10-3,21.3) have been investigated…”
Get full text

Resonance shifts in the excitation of the n = 0, K = 1 to 6 quadrupolar resonances for ions confined in a linear ion trap by Collings, B.A., Sudakov, M., Londry, F.A.

“…Experiments examining the excitation of the quadrupolar n = 0, K = 1 to 6 resonances for the ion reserpine in a linear ion trap have been shown to produce…”
Get full text

Stability of a highly charged noncovalent complex in the gas phase: holomyoglobin by Chen, Yu-Luan, Campbell, J. M., Collings, B. A., Konermann, Lars, Douglas, D. J.

“…Gas phase holomyoglobin (hMb) ions in charge states +7 to +21 were formed by electrospray ionization in combination with a continuous‐flow mixing apparatus…”
Get full text

A combined linear ion trap time-of-flight system with improved performance and MS(n) capabilities by Collings, B A, Campbell, J M, Mao, D, Douglas, D J

“…A detailed description of a linear ion trap time-of-flight (TOF) mass spectrometer system, capable of sequential mass spectrometry (MS(n)), is given. Many…”
Get full text

Detection of noncovalent complex between α-amylase and its microbial inhibitor tendamistat by electrospray ionization mass spectrometry by Douglas, D. J., Collings, B. A., Numao, S., Nesatyy, Victor J.

“…Electrospray ionization mass spectrometry (ESI‐MS) is now routinely used for detection of noncovalent complexes. However, detection of noncovalent…”
Get full text

A new linear ion trap time-of-flight system with tandem mass spectrometry capabilities by Campbell, J. M., Collings, B. A., Douglas, D. J.

“…A new hybrid linear ion trap time‐of‐flight mass spectrometer has been constructed and the first results for tandem‐in‐time MS/MS in a 2‐dimensional Paul trap…”
Get full text

A combined linear ion trap time-of-flight system with improved performance and MSn capabilities by Collings, B. A., Campbell, J. M., Mao, Dunmin, Douglas, D. J.

“…A detailed description of a linear ion trap time‐of‐flight (TOF) mass spectrometer system, capable of sequential mass spectrometry (MSn), is given. Many…”
Get full text

Observation of the transition state HD2++ in collisions, H+D2 by COLLINGS, B. A, POLANYI, J. C, SMITH, M. A, STOLOW, A, TARR, A. W

Get full text

Photoinduced charge-transfer dissociation of HCl on Ag(111) by CHO, C.-C, COLLINGS, B. A, HAMMER, R. E, POLANYI, J. C, STANNERS, C. D, WANG, J. H, XU, G.-Q

Get full text

Conformation of native, reduced and [5-55]Ala bovine pancreatic trypsin inhibitor in the gas phase by Nesatiy, Victor, Chen, Yu-Luan, Collings, B. A., Douglas, D. J.

“…Collision cross sections have been measured for gas phase ions of native oxidized bovine pancreatic trypsin inhibitor (BPTI), native reduced BPTI and a mutant…”
Get full text

An atom-resolved view of silicon nanoclusters by McComb, D.W., Collings, B.A., Wolkow, R.A., Moffatt, D.J., MacPherson, C.D., Rayner, D.M., Hackett, P.A., Hulse, J.E.

“…Atomically resolved scanning tunneling microscope images of Si clusters deposited onto a Si(111)-7 × 7 substrate have been obtained. The clusters display a…”
Get full text

Absorption spectra of small niobium and gold clusters measured by photodepletion of their rare gas van der Waals complexes: some preliminary experiments by Collings, B. A., Athanassenas, K., Rayner, D. M., Hackett, P. A.

Get full text

Branching in the gaseous reaction hydrogen atom + deuterium chloride as a function of collision energy by Barclay, V. J, Collings, B. A, Polanyi, J. C, Wang, J. H

Get full text