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Creator | Title | Description | Subject | Date |
1 |
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Beckerle, Mary C. | Adhesion plaque protein, talin, is phosphorylated in vivo in chicken embryo fibroblasts exposed to the tumor-promoting phorbol ester | Talin is a high molecular weight phosphoprotein that is localized at adhesion plaques. We have found that talin phosphorylation increases 3.0-fold upon exposure of chicken embryo fibroblasts to the tumor-promoting phorbol ester, phorbol 12-myristate 13-acetate. | Talin; Vinculin; Chicken embryo fibroblasts | 1990 |
2 |
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Olivera, Baldomero M.; Parks, Thomas N. | Conantokin-T: a γ-carboxyglutamate containing peptide with N-methyl-D-aspartate antagonist activity | Conantokin-T, a 21-amino acid peptide which induces sleep-like symptoms in young mice was purified from the venom of the fish-hunting cone snail, Conus tulipa. The amino acid sequence of the peptide was determined and verified by chemical synthesis. The peptide has 4 residues of the modified amino ... | Conotoxins; Conantokin-T; N-methyl-D-aspartate antagonist; Conus tulipa | 1990 |
3 |
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Golden, Kenneth M. | Convexity and exponent inequalities for conduction near percolation | The bulk conductivity o*(p) of the bond lattice in Zd with a fraction p of conducting bonds is analyzed. Assuming a hierarchical node-link-blob (NLB) model of the conducting backbone, it is shown that o*(p) (for this model) is convex in p near the percolation threshold pc, and that its critical expo... | Lattice; Conductivity; Model | 1990 |
4 |
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Armentrout, Peter B. | Dissociative charge transfer reactions of Ar+, Ne+, and He+ with CF4 from thermal to 50 eV | Guided ion-beam techniques are used to measure the cross sections for reaction of CF4 with Ar+, Ne+, and H e + from thermal to 50 eV. Dissociative charge transfer followed by successive loss of F atoms are the major processes observed. Only CFx+ (x = 1,2,3) products are observed in the reactions of ... | Ion-molecule reactions; Transfer reactions; Carbon tetrafluoride; Rare gas ions; Exothermic reactions; Endothermic reactions; Plasma systems | 1990 |
5 |
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Olivera, Baldomero M. | DNA-topoisomerase modification | The first reports of topoisomerase modification were published in 1982 and 1983 (Mills et al. 1982; Durban et al. 1983; Ferro et al. 1983; Jongstra-Bilen et al. 1983). Although a wide variety of posttranslational modifications of DNA topoisomerases may occur, this chapter focuses only on phosphoryl... | Poly(ADP-ribosylation); Serine residues | 1990 |
6 |
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Mattis, Daniel C. | Dynamics of quasiparticles in the two-dimensional Hubbard model | The Hubbard model at half-filling is a collective, antiferromagnetic insulator. We study added electrons or holes. The insulating energy gap and the dispersion of the added carriers are calculated variationally in two dimensions with use of a Monte Carlo evaluation of the electronic correlation f... | Dispersion; Electrons; Carriers | 1990 |
7 |
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Armentrout, Peter B. | Kinetic energy dependence of dissociative charge-transfer reactions of He+, Ne+, Ar+, Kr+, and Xe+ with silane | Guided ion-beam techniques are used to measure the cross sections as a function of kinetic energy for reaction of SiH4 with He +, Ne +, Ar +, Kr +, and Xe +. State-specific data for the 2P3/2 ground spin-orbit states of Kr+ and Xe+ are also obtained. | Silane; Charge-transfer reactions; Ion-molecule reactions; Ion energy; Rare gas ions; Plasma systems | 1990 |
8 |
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Williams, Clayton C. | Lateral dopant profiling in MOS structures on a 100 nm scale using scanning capacitance microscopy | Scanning capacitance microscopy and atomic force microscopy have been used to image the extent of lateral dopant diffusion in MOS structures. The data are capacitance vs. voltage measurements made on a submicron scale. The technique is non-destructive when imaging uncleaved samples. New experim... | Scanning capacitance microscopy; Dopant profiling | 1990 |
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Blair, David F. | MotA protein of E. coli is a proton-conducting component of the flagellar motor | A number of mutants of motA, a gene necessary for flagellar rotation in E. coli, were isolated and characterized. Many mutations were dominant, owing to competition between functional and nonfunctional MotA for a limited number of sites on the flagellar motor. A new class of mutant was discovered... | MotA protein; MotA gene; Flagellar motor; Proton-conducting | 1990 |
10 |
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Ailion, David Charles | NMR determination of the Edwards-Anderson order parameter in the deuterated pseudo-spin glass Rb1-x(ND4)xD2PO4: anisotropy and concentration dependence of the ND4 deuteron second moment | We measured the rotationally averaged N D 4 + deuteron second moment in deuterated mixed single crystals Rb1_x(ND4 ) xD2P04 with x = 0.22, 0.44, 0.78, and pure ND4D2P04 . We found that the linewidths of the mixed systems show a strong dependence on the crystal's orientation with respect to the exter... | NMR; Crystals; Deuteron second moment; Anisotropy; Linewidth | 1990 |
11 |
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Vardeny, Zeev Valentine | Picosecond photomodulation study of nanocrystalline hydrogenated silicon | We have extended our photomodulation studies of nc-Si:H to the picosecond time domain. We measured the decays of photoinduced reflectivity with lOOfs temporal resolution as a function of. light intensity. Comparison with the data obtained on a-Si:H and c-Si indicates that ultrafast trapping and reco... | Picosecond photomodulation; Nanocrystalline silicon | 1990 |
12 |
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Morse, Michael David | Spectroscopy and electronic structure of jet-cooled Al? | Resonant two-photon ionization spectroscopy has been used to study the jet-cooled Al? molecule. The ground state has been conclusively demonstrated to be of 3IIu symmetry, deriving from the ???rr?u electronic configuration. High resolution studies have established the bond length of the X?IIu state ... | | 1990 |
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Morse, Michael David | Spectroscopy and electronic structure of jet-cooled NiPd and PdPt | Resonant two-photon ionization spectroscopy of jet-cooled NiPd and PdPt has revealed a dense vibronic spectrum for NiPd and a much more sparse spectrum for PdPt. Four vibrational progressions have been identified for NiPd, and three have been located for PdPt. High resolution investigations of NiPd... | | 1990 |
14 |
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Vardeny, Zeev Valentine | Studies of picosecond carrier dynamics in polysilane alloys: evidence for geminate recombination in small hydrogenated amorphous silicon clusters | The ultrafast photocarrier dynamics in polysilane alloys amorphous (SiH2)n' has been studied using the picosecond photoinduced absorption (PA) technique. For excitation below the optical gap, the PA response decays exponentially and is faster at low temperatures. This is interpreted in terms of e-h ... | Picosecond carrier dynamics; Polysilane alloys; Geminate recombination; a-Si:H; Amorphous silicon; Ultrafast relaxation; Photoexcited carriers | 1990 |
15 |
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Potts, Wayne K. | Surprisingly uneven distribution of the T cell receptor Vβ repertoire in wild mice | Heterodimeric TCRa/Bs are made up of combinations of V D, J, and C elements. The majority of laboratory inbred mouse strains are of the VBh haplotype and have at least 20 VB genes from which to construct TCRs (1, 2); however, a number of strains have been reported to have deletions of large portion... | | 1990 |
16 |
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Bohs, Lynn A. | Systematics of Solanum section Allophyllum (Solanaceae) | Three species of Solarium are included in a new section, Solarium sect. Allophyllum. Two of the species, S. allophyllum and S. mapiriense, have been previously known; the third, S. morellifolium Bohs, is described as new. The combination of characters exhibited by members of this section, such as un... | Solanum section Allophyllum; Solanum allophyllum; Solanum morellifolium; Solanum mapiriense | 1990 |
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Vardeny, Zeev Valentine | Ultrafast electronic and acoustic effects in conducting polymers | The polarized picosecond pump and probe technique with 50 fsec resolution has been used to generate and detect electronic excitations and propagation of ultrasonic phonons in thin films of oriented and unoriented polyacetylene and polythiophene. We found that the photoexcitations are instantaneou... | Ultrafast electronic effects; Ultrafast acoustic effects; Polarized picosecond pump; Pump and probe technique; Ultrasonic phonons | 1990 |