|
|
Creator | Title | Description | Subject | Date |
301 |
|
Miller, Joel Steven; Epstein, Arthur J. | Dynamic spin fluctuations in the molecular ferromagnet (DMeFc)(TCNE) | The static and dynamic magnetic properties of the molecular ferromagnet decamethylferrocenium tetracyanoethenide (DMeFc)(TCNE) are studied via the muon-spin-relaxation technique. Spontaneous order is observed in the ferromagnetic ground state below 5 K, while the muon-spin-relaxation rate in the par... | Magnetic; Magnetization; Paramagnetic | 2001 |
302 |
|
Armentrout, Peter B. | Guided ion-beam studies of the kinetic-energy-dependent reactions of Con+ (n=2-16) with D2: cobalt cluster-deuteride bond energies | The kinetic-energy-dependent cross sections for the reactions of Con + (n=2-16) with D2 are measured as a function of kinetic energy over a range of 0-8 eV in a guided ion-beam tandem mass spectrometer. The observed products are ConD+ for all clusters and ConD2+ for n=4,5,9-16. | Cobalt ions; Metal clusters; Deuteride; Collision-induced dissociation; Endothermic reactions; Bond energies | 2005 |
303 |
|
Borodai, Anastasia S. | The effects of various metal ions on the folding of G-quadruplexes | Divalent metal cations inhibit the folding of G-Quadruplexes | G-Quadruplex; Divalent cations; Metal ions; Nucleic acids; Guanine; Tetrads | 2015-03-31 |
304 |
|
Morse, Michael David | Detection of nonpolar lons in 2?3/2 States by Radioastronomy via Magnetic Dipole Transitions | The possibility of magnetic dipole-induced pure rotational transitions in the interstellar medium is investigated for symmetric Hund?s case (a) linear molecules, such as H-C?C-H+(X~2?3/2u), CO2+ (X~2?3/2g), H-C?C-?C-H+ (X~2?3/2g), and N3 (X~2?3/2g). These species lackan electric dipole moment and th... | | 2011 |
305 |
|
Miller, Joel Steven | Manganese(II)octabutoxynaphthalocyanine and its ferrimagnetic electron-transfer salt with TCNE | The magnetic susceptibility (x) of 1,6,10,15,19,25,28,32- octa-n-butoxynaphthalocyaninatomanganese(III) tetracyanoethanide can be fit to a Curie-Weiss expression with O=54 K for T>150 K, and the xT(T) data are consistent with linear chains and can be fit to a Seiden expression for alternating S=2 a... | Magnetic; Ordering; Magnetization | 2000 |
306 |
|
Armentrout, Peter B. | Guided ion beam and theoretical study of the reactions of Os + with H 2, D 2, and HD | Reactions of the third-row transition metal cation Os+ with H2, D2, and HD to form OsH+ (OsD+) were studied using a guided ion beam tandem mass spectrometer. A flow tube ion source produces Os+ in its 6D (6s15d6) electronic ground state level. Corresponding state-specific reaction cross sections are... | | 2011 |
307 |
|
Miller, Joel Steven; Epstein, Arthur J. | Photoinduced magnetism, dynamics, and cluster glass behavior of a molecule-based magnet | The dynamic susceptibility study of photoinduced magnetism in a molecule-based magnet, (K1-2xCo1+x [Fe(CN)6]. yH2O (0.2<_x<_0.4,y-5), is reported. Upon excitation with visible light the material has substantial changes in linear and nonlinear ac susceptibility and dc magnetization. The results d... | Magnetization; Light; Magnetometer | 2000 |
308 |
|
Miller, Joel Steven; Liao, Yi | Synthesis and structure of an asymmetric copper(I) dimer with two-coordinate and four-coordinate copper(I) sites | Copper(I) coordination compounds have been studied intensively due to their biological relevance, catalytic properties, and theoretical interests. Numerous mononuclear and polynuclear copper(I) complexes with different coordination numbers have been prepared and characterized. Recently the possible ... | Polynuclear; Nitrogens; Electrons | 2000 |
309 |
|
Armentrout, Peter B. | Communication: Theoretical exploration of Au++ H2, D2, and HD reactive collisions | A quasi-classical study of the endoergic Au+(¹S) + H₂(X¹Σ+g) → AuH+ (²Σ+) + H(²S) reaction, and isotopic variants, is performed to compare with recent experimental results [F. Li, C. S. Hinton, M. Citir, F. Liu, and P. B. Armentrout, J. Chem. Phys. 134, 024310 (2011)]. For this purpose, a ... | | 2011 |
310 |
|
Armentrout, Peter B. | Statistical modeling of competitive threshold collision-induced dissociation | Collision-induced dissociation of (R1OH)Li+(R2OH) with xenon is studied using guided ion beam mass spectrometry. R1OH and R2OH include the following molecules: water, methanol, ethanol, 1-propanol, 2-propanol, and 1-butanol. In all cases, the primary products formed correspond to endothermic loss of... | Collision-induced dissociation; Xenon ions; Alcohols | 1998 |
311 |
|
Miller, Joel Steven; Epstein, Arthur J. | Effect of disorder on the linear and nonlinear magnetic susceptibilities of two manganeseporphryin-based magnets | We analyze the effects of disorder on the magnetic properties of two manganeseporphyrins, [MnTPP][TCNE] •. x(o-DCB) and [MnTPP][TCNE] . • y(o-Xy) and (TPP=meso-tetraphenylporphyrinato, TCNE=tetracyanoethylene, o-Xy=o-xylene, o-DCB=o-dichlorobenzene, x<_3,y<_1). We present data for the in- ... | Magnetization; Ferrimagnetic; Spins | 1997 |
312 |
|
Blumenthal, Donald K.; Trewhella, Jill | Conformationally dynamic C helix of the RIalpha subunit of protein kinase A mediates isoform-specific domain reorganization upon C subunit binding. | Different isoforms of the full-length protein kinase A (PKA) regulatory subunit homodimer (R2) and the catalytic (C) subunit-bound holoenzyme (R2C2) have very different global structures despite similar molecular weights and domain organization within their primary sequences. To date, it has been th... | Protein Isoforms; Global Structures; cAMP | 2005-10-21 |
313 |
|
Armentrout, Peter B. | Sequential bond energies and barrier heights for the water loss and charge separation dissociation pathways of Cd2+(H2O)n, n 3-11 | The bond dissociation energies for losing one water from Cd2+(H2O)n complexes, n=3?11, are measured using threshold collision-induced dissociation in a guided ion beam tandem mass spectrometer coupled with a thermal electrospray ionization source. Kinetic energy dependent cross sections are obtained... | | 2011 |
314 |
|
Morse, Michael David | Resonant two-photon ionization spectroscopy of jet-cooled RuC | A resonant two-photon ionization study of the jet-cooled RuC molecule has identified the ground state as a 1?+ state arising from the 10?211?25rr42?4 configuration. The 3?i state arising from the 10?211?25rr42?312?1 configuration lies very low in energy, with the 3?3 and 3?2 components lying only 76... | | 1998 |
315 |
|
Poulter, Charles Dale | Yeast squalene synthase. A mechanism for addition of substrates and activation by NADPH | Squalene synthase catalyzes the condensation of two molecules of farnesyl diphosphate (FPP) to give presqualene diphosphate (PSPP) and the subsequent reductive rearrangement of PSPP to squalene. Previous studies of the mechanism of addition of FPP to the enzyme have led to conflicting interpretation... | Enzyme Activation; Sesquiterpenes; Kinetics | 1993-04-15 |
316 |
|
Song, Bin; Molinero, Valeria | Thermodynamics and structural signatures of methane-methane in monatomic water | | | 2013 |
317 |
|
Poulter, Charles Dale | Farnesyl pyrophosphate synthetase. Mechanistic studies of the 1'-4 coupling reaction with 2-fluorogeranyl pyrophosphate. | The mechanism of the 1'-4 coupling reaction between isopentenyl pyrophosphate and geranyl pyrophosphate catalyzed by farnesyl pyrophosphate synthetase from porcine liver was studied with the allylic substrate analogue 2-fluorogeranyl pyrophosphate. 2-Fluorogeranyl pyrophosphate is an alternate subst... | Kinetics; Liver; Mass Spectrometry; Organophosphorus Compounds; Protein Binding | 1978-10-25 |
318 |
|
Poulter, Charles Dale; Davis, Darrell R. | 15N-labeled Escherichia coli tRNAfMet, tRNAGlu, tRNATyr, and tRNAPhe. Double resonance and two-dimensional NMR of N1-labeled pseudouridine. | The N1 imino units in Escherichia coli tRNAfMet, tRNAGlu, tRNAPhe, and tRNATyr were studied by 1H-15N NMR using three different techniques to suppress signals of protons not attached to 15N. Two of the procedures, Fourier internuclear difference spectroscopy and two-dimensional forbidden echo spectr... | Escherichia coli; Magnetic resonance spectroscopy; Nitrogen; Nucleic acid conformation | 1985-08-15 |
319 |
|
Poulter, Charles Dale; Davis, Darrell R. | 15N labeled e. coli tRNAMet, tRNAGlu, tRNATyr, and tRNAPhe. Double resonance and two dimensional NMR of H-N1 units in pseudouridine | The N1 imino units in Escherichia coli tRNAfMet, tRNAGlu, tRNAPhe, and tRNATyr were studied by 1H-15N NMR using three different techniques to suppress signals of protons not attached to 15N. Two of the procedures, Fourier internuclear difference spectroscopy and two-dimensional forbidden echo spectr... | Escherichia coli; Magnetic resonance spectroscopy; Nucleic acid conformation | 1985-08-15 |
320 |
|
Poulter, Charles Dale; Davis, Darrell R. | 15N-labeled tRNA. Identification of 4-thiouridine in Escherichia coli tRNASer1 and tRNATyr2 by 1H-15N two-dimensional NMR spectroscopy. | Uridine is uniquely conserved at position 8 in elongator tRNAs and binds to A14 to form a reversed Hoogsteen base pair which folds the dihydrouridine loop back into the core of the L-shaped molecule. On the basis of 1H NMR studies, Hurd and co-workers (Hurd, R. E., Robillard, G. T., and Reid, B. R. ... | Magnetic resonance spectroscopy | 1986-09-15 |
321 |
|
Poulter, Charles Dale; Davis, Darrell R. | 15N-labeled tRNA. Identification of dihydrouridine in Escherichia coli tRNAfMet, tRNALys, and tRNAPhe by 1H-15N two-dimensional NMR. | The N3 imino units of dihydrouridine were identified in samples of 15N-labeled Escherichia coli tRNAfMet, tRNALys, and tRNAPhe by 1H-15N two-dimensional NMR. The peaks for dihydrouridine had high field 1H (9.7-9.8 ppm) and 15N (147.8-149.5 ppm) chemical shifts. Assignments were made by 1H-15N chemic... | Hydrogen Bonding; Magnetic Resonance Spectroscopy; Magnetic Resonance Spectroscopy | 1986-03-15 |
322 |
|
Poulter, Charles Dale | Isopentenyl diphosphate:dimethylallyl diphosphate isomerase. An improved purification of the enzyme and isolation of the gene from Saccharomyces cerevisiae. | Isopentenyl diphosphate:dimethylallyl diphosphate isomerase (IPP isomerase) is an enzyme in the isoprenoid biosynthetic pathway which catalyzes the interconversion of the primary five-carbon homoallylic and allylic diphosphate building blocks. We report a substantially improved procedure for purific... | Amino Acid Sequence; Base Sequence; Chromatography, Gel; Chromatography, Ion Exchange | 1989-11-15 |