UScholar Works
 
Filters: Collection: "ir_uspace"
251 - 275 of 1,196
Number of results to display per page
CreatorTitleDescriptionSubjectDate
251 Miller, Joel StevenStructural and magnetic characterization of a- and B-2,4-hexadiyne-1,6-diyl Bis(2,2,5,5-tetramethyl-1-oxyl-3-pyrroline-3-carboxylate) and its thermal degradation productThe search for ferromagnetic organic compounds and polymers is the focus of contemporary research.1 - 5 Polymerization of di-iminoxyl diacetylene monomers has been suggested as a means to prepare a high spin potentially ferromagnetically coupled polymers3 and the thermal, photochemical, and glow di...Ferromagnetic; Magnetization; Polymers1989
252 Lupton, John MarkIntrinsic room-temperature electrophosphorescence from a π-conjugated polymerElectrically induced phosphorescence from a poly(para-phenylene) ladder-type polymer is observed for the first time and characterized using time resolved spectroscopy. Short-lived phosphorescence is also observed in gated fluorescence spectra and is found to be quenched reversibly by oxygen. Therm...pi-conjugated polymers; Electrophosphorescence; Ladder-type polymer; Gated fluorescence spectra2002-09
253 Khan, Faisal HabibMagnetic stimulation of mammalian peripheral nerves in vivo: An alternative to functional electrical stimulationFunctional electrical stimulation is the current gold standard for stimulating neuronal interfaces for functional neuromuscular and cortical applications, but it is not without its drawbacks. One such fault is the need to have direct electrical contact with the nerve tissue, and any side effect...2014-01-01
254 Couldwell, William T.Malignant glioma-derived soluble factors regulate proliferation of normal adult human astrocytesMalignant gliomas are characteristically surrounded by marked gliosis. To assess whether glioma-derived products contribute to the proliferation of astrocytes, a feature of the gliosis response, we evaluated the influence of culture supernatants from malignant human glioma lines and tumor cyst fluid...Astrocyte; Glioma; Gliosis; Proliferation; Soluble factors1992
255 Hansen, Mark S.; Healy, Lindsey J.; Johnson, Christopher R.; Capecchi, Mario R.; Keller, Charles; Jones, Greg M.Virtual histology of transgenic mouse embryos for high-throughput phenotyping.A bold new effort to disrupt every gene in the mouse genome necessitates systematic, interdisciplinary approaches to analyzing patterning defects in the mouse embryo. We present a novel, rapid, and inexpensive method for obtaining high-resolution virtual histology for phenotypic assessment of mouse ...Forkhead Transcription Factors; Paired Box Transcription Factors2006
256 Mitchell, Joyce A.International efforts in nanoinformatics research applied to nanomedicineBackground: Nanomedicine and nanoinformatics are novel disciplines facing substantial challenges. Since nanomedicine involves complex and massive data analysis and management, a new discipline named nanoinformatics is now emerging to provide the vision and the informatics methods and tools needed fo...2011-01-01
257 Regehr, JohnCPU reservations and time constraints: implementation experience on windows NTThis paper presents an implementation of scheduling abstractions originally developed for the Rialto real-time operating system within a research version of Windows NT called Rialto/NT. These abstractions, CPU Reservations and Time Constraints, as described in the 1997 SOSP paper [Jones et al. 97], ...1999-01-01
258 Gesteland, Raymond F.Cell-free synthesis of herpes simplex virus proteinsPolyribosomes isolated from herpes simplex virus type I (HSV-1)-infected cells have been used to program a eucaryotic cell-free translation system. At least 10 HSV-specific polypeptides, with apparent molecular weights of 25,000 to 160,000, are synthesized by wild-type HSV-infected polyribosomes. Po...Viral Proteins; Herpes Simplex; Peptide Biosynthesis; Thymidine Kinase1977
259 Furse, Cynthia M.Feasibility of spread spectrum sensors for location of arcs on live wiresSpread spectrum methods are an important emerging class of sensors that have the potential to locate small, intermittent faults on energized aircraft power circuit wires. Previous work has demonstrated the use of these methods for hard faults (open and short circuits). This paper extends that work ...Spread spectrum sensors; Wire fault location; Live wires2005-12
260 Liu, FengNature of reactive O2 and slow CO2 evolution kinetics in CO oxidation by TiO2 supported Au clusterRecent experiments on CO oxidation reaction using seven-atom Au clusters deposited on TiO2 surface correlate CO2 formation with oxygen associated with Au clusters. We perform first principles calculations using a seven-atom Au cluster supported on a reduced TiO2 surface to explore potential candidat...Au clusters; TiO2; Kinetic evolution2006
261 Olivera, Baldomero M.; McIntosh, J. MichaelNuclear magnetic resonance solution conformation of α-conotoxin AuIB, an α3ß4 subtype-selective neuronal nicotinic acetylcholine receptor antagonistThe neuronal nicotinic acetylcholine receptors constitute a highly diverse group, with subtypes consisting of pentameric combinations of α and ß subunits. α-Conotoxins are a homologous series of small peptides that antagonize these receptors. We present the three-dimensional solution structure ...Conotoxins; a-conotoxin AuIB2000
262 DeTar, CarletonHigh-precision lattice QCD confronts experimentThe recently developed Symanzik-improved staggered-quark discretization allows unquenched lattice-QCD simulations with much smaller (and more realistic) quark masses than previously possible. To test this formalism, we compare experiment with a variety of nonperturbative calculations in QCD draw...Staggered quarks2004-01
263 Vardeny, Zeev ValentinePhotoexcitation dynamics in C60-doped PPV under bias illuminationWe have studied photoexcitation dynamics in pristine and C60-doped PPV films under bias Olumination by photoinduced absorption (PA), optically-detected magnetic resonance (ODMR), and electromodulated PA (EPA). Intrachain polaron pair species are the dominant excitations under these conditions. The p...Photoexcitation dynamics; C60-doped PPV; Bias illumination; PPV films; Photoinduced absorption; ODMR; Electroabsorption1996
264 Couldwell, William T.Transmaxillary approach to the anterior cavernous sinus: a microanatomic studyOBJECTIVE: Several approaches to expose the anterior cavernous sinus have been used, such as frontotemporal, orbitofrontal, anterior subtemporal, and various transfacial approaches. In an effort to gain exposure to the anterior cavernous sinus without necessitating a craniotomy or wide transfacial ...Anterior cavernous sinus; Clivus; Cranial base; Maxillary sinus1997
265 Gerig, GuidoBrain volumes in psychotic youth with schizophrenia and mood disordersBackground: We sought to test the hypothesis that deficits in grey matter volume are characteristic of psychotic youth with early-onset schizophrenia-spectrum disorders (EOSS) but not of psychotic youth with early-onset mood disorders (EOMD). Methods: We used magnetic resonance imaging to examine br...2010-01-01
266 Miller, Joel Steven; Epstein, Arthur J.Molecule-based magnets - an overviewMolecule-based* magnets are a broad, emerging class of magnetic materials that expand the materials properties typically associated with magnets to include low density, transparency, electrical insulation, and low-temperature fabrication, as well as combine magnetic ordering with other proper...Spin; Magnetization; Magnetic ordering2000
267 Christensen, Douglas A.Acoustic droplet vaporization, cavitation, and therapeutic properties of copolymer-stabilized perfluorocarbon nanoemulsionsAcoustic and therapeutic properties of Doxorubicin (DOX) and paclitaxel (PTX)-loaded perfluorocarbon nanoemulsions have been investigated in a mouse model of ovarian cancer. The nanoemulsions were stabilized by two biodegradable amphiphilic block copolymers that differed in the structure of the hydr...Cancer therapy; Targeted drug delivery; Nanobubbles; Ultrasound; Perfluoropentane2009
268 Johnson, Christopher R.Map3d: scientific visualization program for multichannel time series data on unstructured, three-dimensional meshes. program user's guideThere are many examples in biomedical research of recording time signals with multi-sensor arrays whose elements are arranged in irregular, three-dimensional grids [1, 2, 3, 4]. If the nodes in such arrays can be connected into "surfaces", it is possible to employ linear interpolation techniques to ...Map3D; Multi-sensor arrays; Scientific visualization; Multichannel time series data; Three-dimensional meshes1994
269 Vardeny, Zeev ValentineOptical studies of excess carrier recombination in α-Si:H: evidence of dispersive diffusionRelaxation of photoinduced optical absorption following pulsed laser excitation was measured between 0.5 pis and 10 ms in doped and undoped a-Si:H as a function of temperature. The recombination was found to be bimolecular diffusion limited. The diffusion coefficient of the excess carriers is time ...Hydrogenated amorphous silicon; a-Si:H; Excess carrier recombination; Dispersive diffusion1980-05
270 Dailey, Andrew T.Resolution of an actinomycotic abscess with nonsurgical treatment: case reportA CASE OF actinomycotic brain abscess is presented. Conservative treatment by prolonged administration of antibiotics after needle biopsy showed complete resolution of the abscess. Previously reported cases suggest that definitive treatment requires excision or open surgical drainage of the abscess...Actinomycotic abscess; Brain abscess; Actinomyces israelii; Nonsurgical treatment1993
271 Stevens, KennethTotal ionizing dose characterization of a commercially fabricated asynchronous FFT for space applicationsThe total ionizing dose characterization of the radiation-hardened implementation of a novel architecture for high-performance, energy efficiency FFT engines is presented. Simulations and test chip measurement results indicate that a radiation-tolerant 1024-point FFT based on this architecture will...2000
272 Gesteland, Raymond F.; Wills, Norma M.; Atkins, John F.Comparative studies of frameshifting and nonframeshifting RNA pseudoknots: a mutational and NMR investigation of pseudoknots derived from the bacteriophage T2 gene 32 mRNA and the retroviral gag-pro frameshift siteMutational and NMR methods were used to investigate features of sequence, structure, and dynamics that are associated with the ability of a pseudoknot to stimulate a "1 frameshift. In vitro frameshift assays were performed on retroviral gag-pro frameshift-stimulating pseudoknots and their derivati...Frameshifting; NMR; Pseudoknot; Retrovirus2002
273 Poulter, Charles DaleEnzymes encoded by the farnesyl diphosphate synthase gene family in the big sagebrush Artemisia tridentata ssp. spiciformisFarnesyl diphosphate synthase catalyzes the sequential head-to-tail condensation of two molecules of isopentenyl diphosphate with dimethylallyl diphosphate. In plants the presence of farnesyl diphosphate synthase isozymes offers the possibility of differential regulation. Three full-length cDNAs enc...Amino Acid Sequence; Base Sequence; Molecular Sequence Data2003-08-22
274 Frederick, Jeanne M.; Thulin, Craig; Bernstein, Paul S.Identification and characterization of a Pi isoform of glutathione S-transferase (GSTP1) as a zeaxanthin-binding protein in the macula of the human eyeUptake, metabolism, and stabilization of xanthophyll carotenoids in the retina are thought to be mediated by specific xanthophyll-binding proteins (XBPs). A membrane-associated XBP was purified from human macula using ion-exchange chromatography followed by gel-exclusion chromatography. Two-dimensio...Circular Dichroism; Isoelectric Focusing; Macula Lutea; Xanthophylls2004
275 Blumenthal, Donald K.In vivo evaluation of the delivery and efficacy of a sirolimus-laden polymer gel for inhibition of hyperplasia in a porcine model of arteriovenous hemodialysis graft stenosisSynthetic arteriovenous (AV) hemodialysis grafts are plagued by hyperplasia resulting in occlusion and graft failure yet there are no clinically available preventative treatments. Here the delivery and degradation of a sirolimus-laden polymer gel were monitored in vivo by magnetic resonance imaging ...2012-01-01
251 - 275 of 1,196