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Creator | Title | Description | Subject | Date |
| 1 |
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Beckerle, Mary C. | Atrial natriuretic peptide promotes cardiomyocyte survival by cGMP-dependent nuclear accumulation of zyxin and Akt | This study delineates a mechanism for antiapoptotic signaling initiated by atrial natriuretic peptide (ANP) stimulation leading to elevation of cGMP levels and subsequent nuclear accumulation of Akt kinase associated with zyxin, a cytoskeletal LIM-domain protein. Nuclear targeting of zyxin induces r... | Zyxin; Akt; Cyclic guanosine monophosphate | 2005 |
| 2 |
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Davidson, Diane W. | Cecropia and its biotic defenses | In all the world, the genus Cecropia is unrivaled for the number of myrmecophytes, or true "antplants" counted among its species (McKey & Davidson, 1993). Based on the proportion of Cecropia species producing Mullerian bodies in at least some parts of their distribution, myrmecophytes comprise the ... | Myrmecophytes; Mullerian bodies; Pearl bodies | 2005 |
| 3 |
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Miller, Joel Steven | Crystal engineering or crystal mysticism? A case study | The de novo design and synthesis of a crystalline motif of a substance is a holy grail for a growing number of organic and inorganic synthetic chemists. Achievement of targeted architectural arrangements is less reliable as the complexity increases. Simple substitution of, for example, alkyl penda... | Synthesis, Structure, Chemistry | 2005 |
| 4 |
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Coley, Phyllis D.; Lokvam, John; Kursar, Thomas A. | Divergent defensive strategies of young leaves in two species of Inga | In the recently radiated genus Inga (Fabaceae), few nucleotide substitutions have accumulated among species, yet large divergences have occurred in defensive phenotypes, suggesting strong selection by herbivores. We compared herbivory and defenses of young leaves for I. goldmanii, a more derived spe... | Bioassays; Flavanoids; Heliothis virescens; Herbivory; Inga goldmanii; Inga umbellifera; Leaf development; Non-protein amino acids; Phoebis philea | 2005 |
| 5 |
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Hultine, Kevin | Ecohydrological implications of woody plant encroachment | Increases in the abundance or density of woody plants in historically semiarid and arid grassland ecosystems have important ecological, hydrological, and socioeconomic implications. Using a simplified water-balance model, we propose a framework for conceptualizing how woody plant encroachment is li... | Carbon cycling; ecohydrology; evapotranspiration | 2005 |
| 6 |
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Ehleringer, James R.; Bush, Sarah Elizabeth; Solomon, Douglas Kip | Ecohydrology in a Colorado River riparian forest: implications for the decline of Populus fremontii | Populus fremontii (Fremont cottonwood) was once a dominant species in desert riparian forests but has been increasingly replaced by the exotic invasive Tamarix ramosissima (saltcedar). Interspecific competition, reduced flooding frequency, and increased salinity have been implicated in the widespre... | Populus fremontii; Decline; Colorado River; Utah; Invasive species; Riparian; Salinity; Sap flow; Tamarix ramosissima; Transpiration | 2005 |
| 7 |
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Vardeny, Zeev Valentine | Efficiency enhancement of an organic light-emitting diode with a cathode forming two-dimensional periodic hole array | We fabricated an organic light-emitting diode using a ∏-conjugated polymer emissive layer sandwiched between two semitransparent electrodes: an optically thin gold film anode, whereas the cathode was in the form of an optically thick aluminum (Al) film with patterned periodic subwavelength two-dim... | pi-conjugated polymers; Organic light-emitting diode; OLED | 2005 |
| 8 |
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Vardeny, Zeev Valentine | Electroabsorption spectroscopy of single walled nanotubes | We have measured the electric field modulated absorption of a sample of single-walled nanotubes (SWNT) suspended in a solid polyvinyl alcohol matrix. The electroabsorption (EA) spectrum roughly follows the first derivative of the absorption with respect to photon energy, scales quadratically with t... | Electroabsorption spectroscopy; Single-walled nanotubes; SWNT | 2005 |
| 9 |
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Sperry, John S. | Embolized conduits of rice (Oryza sativa, poaceae) refill despite negative xylem pressure | Embolism reversal in rice plants was studied by testing the plant's ability to refill embolized conduits while xylem pressures were substantially negative. Intact, potted plants were water-stressed to a xylem pressure of -1.88 + 0.1 MPa and a 66.3 + 3.8% loss of xylem conductivity (PLC) by cavitatio... | Embolism; novel revilling; Oryza | 2005 |
| 10 |
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Sperry, John S. | Evaluation of Murray's law in Psilotum nudum (Psilotaceae), an analogue of ancestral vascular plants | Previous work has shown that the xylem of seed plants follows Murray's law when conduits do not provide structural support to the plant. Here, compliance with Murray's law was tested in the stem photosynthesizer Psilotum nudum, a seedless vascular plant. Psilotum nudum was chosen because the central... | Conduit furcation number; hydraulic architecture; Murray's law | 2005 |
| 11 |
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Bohs, Lynn A. | Four-gene study of evolutionary relationships in Solanum section Acanthophora | The "spiny solanums," Solanum subgenus Leptostemonum (Solanaceae), comprise a large lineage with over 350 species and include the cultivated eggplant, Solanum melongena. Despite the importance of this subgenus, phylogenetic relationships among these taxa are currently unclear. The present research... | Acanthophora; Granule-bound starch synthase gene; GBSSI; ITS; Internal transcribed spacer; Solanum; trnS-trnG; trnT-trnF; Waxy | 2005 |
| 12 |
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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 |
| 13 |
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Armentrout, Peter B. | Guided ion-beam studies of the reactions of Con + (n=2-20) with O2: cobalt cluster-oxide and -dioxide bond energies | The kinetic-energy dependence for the reactions of Con + (n=2-20) with O2 is measured as a function of kinetic energy over a range of 0 to 10 eV in a guided ion-beam tandem mass spectrometer. A variety of Com+ , ComO+, and ComO2 + (m<n) product ions is observed, with the dioxide cluster ions domina... | Metal clusters; Cobalt ions; Collision-induced dissociation; Bond energies; Exothermic reactions; Endothermic reactions | 2005 |
| 14 |
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Olivera, Baldomero M. | Identification of a novel pharmacophore for peptide toxins interacting with K+ channels | қM-conotoxin RIIIK blocks TSha1 K+ channels from trout with high affinity by interacting with the ion channel pore. As opposed to many other peptides targeting K+ channels, қM-RIIIK does not possess a functional dyad. In this study we combine thermodynamic mutant cycle analysis and docking calc... | Conotoxins; Peptide toxins; қM-conotoxin RIIIK; Pharmacophore | 2005 |
| 15 |
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Vardeny, Zeev Valentine | Infrared ultrafast optical probes of photoexcitations in ∏-conjugated organic semiconductors | We measured the ultrafast dynamics of photoexcitations in a variety of semiconductor ∏-conjugated polymer films and solutions, in the spectral range from 0.13 eV to 1.05 eV and time domain from 100 fs to 800 ps. The measurements were made in the low signal regime, where the relative changes in tra... | Infrared ultrafast optical probes; Photoexcitations; Ultrafast dynamics; MEH-PPV | 2005 |
| 16 |
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Adler, Frederick R.; Carrier, David R. | Interaction between the X chromosome and an autosome regulates size sexual dimorphism in Portuguese Water Dogs | Size sexual dimorphism occurs in almost all mammals. In Portuguese Water Dogs, much of the difference in skeletal size between females and males is due to the interaction between a Quantitative Trait Locus (QTL) on the X-chromosome and a QTL linked to Insulin-like Growth Factor 1 (IGF-1) on the CFA... | Phenotypes; QTL; Selection | 2005 |
| 17 |
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Vardeny, Zeev Valentine | Linear and nonlinear optical spectroscopies of PPV/PPE copolymer semiconductors | We used a variety of picosecond transient and cw spectroscopies to investigate the linear and nonlinear optical properties of films of PPE/PPV copolymer semiconductor. The spectroscopies used include absorption, electroabsorption (EA) and two-photon-absorption (TPA). In addition to the odd parity e... | Linear optical spectroscopy; Nonlinear optical spectroscopy; PPV/PPE copolymer; pi-conjugated polymers | 2005 |
| 18 |
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Bohs, Lynn A. | Major clades in Solanum based on ndhF sequence data | Analysis of sequence data from the chloropiast gene ndhF identifies at least 12 major well-supported clades within the genus Solanum. These are briefly described, given informal clade names, and compared with the groups recognized by previous Solanum workers. Non-molecular synapomorphies are propos... | Solanum; ndhF | 2005 |
| 19 |
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Beckerle, Mary C.; Yoshigi, Masaaki; Hoffman, Laura M.; Yost, H. Joseph | Mechanical force mobilizes zyxin from focal adhesions to actin filaments and regulates cytoskeletal reinforcement | Organs and tissues adapt to acute or chronic mechanical stress by remodeling their actin cytoskeletons. Cells that are stimulated by cyclic stretch or shear stress in vitro undergo bimodal cytoskeletal responses that include rapid reinforcement and gradual reorientation of actin stress fibers; howev... | Zyxin; Actin | 2005 |
| 20 |
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Vardeny, Zeev Valentine; Efros, Alexei L. | Optical studies of 2D and 3D metallo-dielectric photonic crystals | We have fabricated and studied two-dimensional (2D) and three-dimensional (3D) metallo-dielectric photonic crystals (MDPC) in the visible/near ir spectral range using a variety of optical techniques. The 2D MDPC showed anomalous transmission due to surface plasmon polaritons in resonance with the ph... | Metallo-dielectric photonic crystals; Organic light emitting diodes; Anomalous transmission; surface plasmon polaritons; Opal photonic crystals; Metal infiltrated opals; Optical reflectivity; Transmission spectra | 2005 |
| 21 |
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Vardeny, Zeev Valentine | Optical studies of spin coherence in organic semiconductors | Spin coherence in organic oligomer and polymer semiconductors is a crucial property in determining the performance of organic spin devices. Using the techniques of photo-induced absorption (PA) detected magnetic resonance (PADMR) and photoluminescence (PL) detected magnetic resonance (PLDMR), we ha... | Spin coherence; Organic spin devices | 2005 |
| 22 |
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Vardeny, Zeev Valentine | Organic spin-valves: physics and applications | Spin-valve devices of organic semiconductors in the vertical configuration using a variety of exotic and regular ferromagnetic electrodes were fabricated and studied as a function of applied magnetic field, temperature and applied bias voltage. These devices show that spin polarized carriers can be ... | Organic spin-valves; Spin-polarized transport; Spin-polarized carrier injection; Spin polarization | 2005 |
| 23 |
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Ehleringer, James R. | Oxygen isotope ratios of waters and respired CO2 in Amazonian forest and pasture ecosystems | The oxygen isotope ratio (d18O, SMOW) of atmospheric CO2 is a powerful indicator of large-scale CO2 exchange on land. Oxygen isotopic exchange between CO2 and water in leaves and soils controls the d18O of atmospheric CO2. Currently there is little empirical information on the spatial and temporal ... | Amazonia; Carbon dioxide (CO2); Oxygen isotope ratio; Photosynthesis; Respiration; Stable isotope ratio; Tropical forests | 2005 |
| 24 |
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Bromley, Benjamin C. | Periodic standing-wave approximation: nonlinear scalar fields, adapted corrdinates, and the eigenspectral method | The periodic standing wave (PSW) method for the binary inspiral of black holes and neutron stars computes exact numerical solutions for periodic standing-wave spacetimes and then extracts approximate solutions of the physical problem, with outgoing waves. The method requires solution of a boundary-... | Periodic standing wave method; Black holes; Neutron stars | 2005 |
| 25 |
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Olivera, Baldomero M.; Yoshikami, Doju; Bulaj, Grzegorz | Post-translational amino acid isomerization: a functionally important D-amino acid in an excitatory peptide | The post-translational modification of an L- to a D-amino acid has been documented in relatively few gene products, mostly in small peptides under 10 amino acids in length. In this report, we demonstrate that a 46-amino acid polypeptide toxin has one D-phenylalanine at position 44, and that the ... | D-amino acid; Excitatory peptides; Conotoxins | 2005 |
