Filters: Date: "1994" Format: "application/pdf" School Or College: "College of Science" Collection: "ir_uspace" Type: "Text"
| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
| 1 |
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Ailion, David Charles | 93Nb NMR in the imcommensurate and quasi-commensurate phases of barium sodium niobate | NMR spectra have been measured for the quadrupole perturbed 1/2 -1/2 transition of 9 3Nb in barium sodium niobate (BSN) between 300 and 650 K. The spectra are inhomogeneously broadened in the incommensurate (/) phase between T7 = 580 K and r c = 540 K as well as in the quasicommensurate (QC) phase ... | NMR; Spectra; Barium sodium niobate; Line shapes | 1994 |
| 2 |
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Gesteland, Raymond F.; Ives, Jeffrey T.; Stockham, Thomas G. | Automated film reader for DNA sequencing based on homomorphic deconvolution | An automated reader for electrophoresis based DNA sequencing methods is described that provides fast and accurate sequence determination. Digitized sequencing lanes are processed with homomorphic blind deconvolution in preparation for peak detection, interlane alignment, peak refinement and base cal... | Sequence Analysis; Electrophoresis; Automated Film Reader; Homomorphic Deconvolution | 1994 |
| 3 |
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Beckerle, Mary C. | Biochemical and molecular characterization of the chicken cysteine-rich protein, a developmentally regulated LIM-domain protein that is associated with the actin cytoskeleton | LIM domains are present in a number of proteins including transcription factors, a protooncogene product, and the adhesion plaque protein zyxin. The LIM domain exhibits a characteristic arrangement of cysteine and histidine residues and represents a novel zinc binding sequence (Michelsen et al., ... | Zyxin; Cysteine-rich proteins; cCRP; Actin; LIM domains | 1994 |
| 4 |
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Olivera, Baldomero M. | Conodipine-M, a novel phospholipase A2 isolated from the venom of the marine snail Conus magus | We describe the purification and first biochemical characterization of an enzymatic activity in venom from the marine snail Conus magus. This enzyme, named conodipine-M, is a novel phospholipase A2 with a molecular mass of 13.6 ĸDa and is comprised of two polypeptide chains linked by one or more di... | Conotoxins; Conodipine-M; Conus magus | 1994 |
| 5 |
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Adler, Frederick R. | Construction of multidimensional clustered patterns | Ecological processes often depend upon the patterning, as well as the absolute density, of resources. In this paper, we develop methods for describing pattern from the perspective of the organism encountering and exploiting the resources, and for reconstructing pattern from the description. | Algorithms; clustered resources; foraging | 1994 |
| 6 |
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Bohs, Lynn A. | Cyphomandra (Solanaceae) | Unusual ecological aspects of Cyphomandra include its pollination syndrome and herbivore relationships. Male euglossine bees may be important pollinators of Cyphomandra flowers, and the primary attractants may not be pollen, but odor substances secreted by the anther connectives. Specialized herbi... | Cyphomandra; Latin America | 1994 |
| 7 |
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Adler, Frederick R. | Defended fortresses or moving targets? Another model of inducible defenses inspired by military metaphors | We use a common framework to compare three models of plant strategies to confront herbivory: constitutive defense, optimal inducible defense, and the "moving target." Plants with constitutive defenses retain a fixed defensive phenotype. Plants with optimal inducible defenses respond to attack by inc... | Constitutive defense; optimal inducible defense; phenotype | 1994 |
| 8 |
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Williams, Clayton C.; Stringfellow, Gerald B. | Effect of substrate misorientation on ordering in Ga0.5In0.5P | Ordering produced in Gao.5Ino.5P epitaxial layers grown by OMVPE can be controlled by variations in the substrate misorientation as well as the growth temperature and the growth rate. The ordering produced at a growth temperature of 620°C and a relatively low growth rate of 0.5 /μm/hr is found to ... | Ga0.5In0.5P; Epitaxial layers; Epitaxial growth; OMVPE | 1994 |
| 9 |
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Gesteland, Raymond F.; Weiss, Robert B. | Efficient shine- Dalgarno sequence but not translation is necessary for LacZ mRNA stability in Escherichia coli | The 5' ends of many bacterial transcripts are important in determining mRNA stability. A series of Shine-Dalgarno (SD) sequence changes showed that the complementarity of the SD sequence to the anti-SD sequence of 16S rRNA correlates with lacZ mRNA stability in Escherichia coli. Several initiation c... | Protein Biosynthesis; Ribosomes; Escherichia coli; Shine-Dalgarno Sequence | 1994 |
| 10 |
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Golden, Kenneth M. | Exact result for the effective conductivity of a continuum percolation model | A random two-dimensional checkerboard of squares of conductivities 1 and 8 in proportions p and 1 - p is considered. Classical duality implies that the effective conductivity obeys o* = V8 at p = 1/2. It is rigorously found here that to leading order as 8--0, this exact result holds for all p in the... | Particles; Matrix; Checkerboard | 1994 |
| 11 |
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Miller, Joel Steven; Epstein, Arthur J. | Ferromagnetic behavior and magnetic excitations in a molecular-based alternating-spin chain: decamethylchromocenium tetracyanoethenide | We report the study of magnetic properties of a molecular-based alternating-spin chain: metallocenium electron-transfer salt decamethylchromocenium tetracyanoethanide, [CrCp(*2)] [TCNE]. We give a modified spin-wave theory for the Heisenberg alternating-spin chains. The low-field susceptibility and... | TCNE; Magnetization | 1994 |
| 12 |
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Symko, Orest George | Formation of AlCuFe quasicrystalline thin films by solid state diffusion | We show that thin films 3000 A in thickness of the icosahedral AlCuFe phase can be formed by solid state diffusion of sputtered Al, Cu, and Fe layers. As for bulk materials, we propose that the icosahedral phase grows by diffusion of the 0.1 in the A13Fe layer previously formed by interdiffusion of... | AlCuFe; Quasicrystalline thin films; Solid state diffusion; Icosahedral phase | 1994 |
| 13 |
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Miller, Joel Steven; Epstein, Arthur J. | Forthcoming attractions | Magnets made from molecules and ions having spins in p orbitals have only been discovered in the past decade. Their solubility in organic solvents and room temperature manufacture means that they should find a variety of applications. | Electron; Temperature; Magnets | 1994 |
| 14 |
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Adler, Frederick R. | General test for interaction modification | How can measurements of population dynamics be used to deduce the mechanisms of interaction in an assemblage of species? We present a technique to use such measurements to distinguish among assemblages of species with no direct interactions, sets of species influenced predominantly by pairwise inter... | Species; Population; Dynamics | 1994 |
| 15 |
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Morse, Michael David | Interaction of an aluminum atom with a closed subshell metal atom: spectroscopic analysis of AIZn | Resonant two-photon ionization spectroscopy has been employed to investigate diatomic AlZn produced by laser vaporization of a 1:2 Al:Zn alloy target disk in a supersonic expansion of helium. Several discrete transitions are reported in the energy range from 18 400 to 19 100 cm-?. Most of these are... | 1994 | |
| 16 |
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Morse, Michael David | Interaction of an aluminum atom with an alkaline earth atom: spectroscopic and ab initio investigations of AICa | A spectroscopic analysis of diatomic AlCa generated by laser vaporization of a 2:1 AI:Ca metal alloy followed by supersonic expansion has been completed using resonant two-photon ionization spectroscopy. Four excited electronic states have been identified and investigated in the energy region from 1... | 1994 | |
| 17 |
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Poulter, Charles Dale | Isoprenyl diphosphate synthases: protein sequence comparisons, a phylogenetic tree, and predictions of secondary structure | Isoprenyl diphosphate synthases are ubiquitous enzymes that catalyze the basic chain-elongation reaction in the isoprene biosynthetic pathway. Pairwise sequence comparisons were made for 6 farnesyl diphosphate synthases, 6 geranylgeranyl diphosphate synthases, and a hexaprenyl diphosphate synthase... | Catalytic site; Evolution; Farnesyl diphosphate; Geranylgeranyl diphosphate; Prenyltransferase; Substrate binding: | 1994 |
| 18 |
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Vardeny, Zeev Valentine | Leng et al. reply | Conwell, Rothberg, and Mizes (CRM) claim [1] that, as a result of chain length distribution and vibronic sidebands of electronic levels in PPV films, there is little correlation between increase of pump photon energy (Hw) and increase of electronic energy, and therefore data from excitation spectros... | Chain length distribution; Vibronic sidebands; PPV films; Pump photon energy | 1994 |
| 19 |
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Miller, Joel Steven; Epstein, Arthur J. | Molecular magnets V(tetracyanoethylene)x.y(solvent): applications to magnetic shielding | The specific advantages and limitations of a new class of polymer based magnets [exemplified by V(TCNE)x. y (solvent) (TCNE= tetracyanoethylene)] for static and low frequency magnetic shielding and inductive applications are evaluated using results of dc superconducting quantum interference device ... | Frequency; Permeability; Transition | 1994 |
| 20 |
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Beckerle, Mary C.; Davis, Darrell R.; Winge, Dennis R. | Mutational analysis of the metal sites in an LIM domain | Site-directed mutagenesis was carried out map the residues that form the two Zn(I1) sites within a LIM domain. The C-terminal LIM domain derived from the cysteine-rich protein was utilized for this analysis and is referred to as LIMB. | LIM domains; Metal-binding | 1994 |
| 21 |
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Bohs, Lynn A. | New species of Solanum section Cyphomandropsis (Solanaceae) from Bolivia | A new species of Solanum sect. Cyphomandropsis (Solanaceae), S. hibernum, is described from the western part of Dept. Santa Cruz, Bolivia. Its strongly discolorous leaves densely covered below with white dendritic hairs distinguish it from the other species in the section. | Solanum hibernum; Cyphomandropsis | 1994 |
| 22 |
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Morse, Michael David | Ni? revisited: reassignment of the ground electronic state | Resonant two-photon ionization spectroscopy was used to study jet-cooled Ni2 produced by pulsed laser ablation of a nickel target in the throat of a supersonic nozzle using argon as the carrier gas. Spectral regions previously investigated using helium as the carrier gas were reinvestigated, and the... | 1994 | |
| 23 |
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Olivera, Baldomero M. | Nicotinic acetylcholine receptor ligand of unique specificity, α-conotoxin ImI | We report the isolation, characterization, and total synthesis of a small peptide ligand for nicotinic acetylcholine receptors (nAChRs). It is highly active against the neuromuscular receptor in frog but noitn mice. In contrast, it induces seizures when injected centrally in mice and rats, suggesti... | Conotoxins; a-conotoxin ImI | 1994 |
| 24 |
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Ailion, David Charles | NMR in substitutionally disordered incommensurate (Rb1-xKx)2ZnCl4 | The impurity-concentration dependence of the 8 7Rb NMR line shapes and phason-induced spin-lattice relaxation rates has been studied over a wide temperature range in substitutional^ disordered incommensurate (Rb1_xKJ C)2ZnCl4 for x =0.00, 0.02, and 0.06. The results yield information on the impurity... | NMR; Line shapes; Phasons; Spin-lattice; Phase fluctuations | 1994 |
| 25 |
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Gesteland, Raymond F.; Atkins, John F.; Wills, Norma M. | rRNA-mRNA base pairing stimulates a programmed -1 ribosomal frameshift | Base pairing between the 3' end of 16S rRNA and mRNA is shown to be important for the programmed -1 frameshifting utilized in decoding the Escherichia coli dnaX gene. This pairing is the same as the Shine-Dalgarno pairing used by prokaryotic ribosomes in selection of translation initiators, but for ... | Frameshifting; Escherichia coli; Binding Sites; Base Composition | 1994 |