Search Results - (Author, Cooperation:B. Powell)
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1Latest Papers from Table of Contents or Articles in PressHessell, A. J., Shapiro, M. B., Powell, R., Malherbe, D. C., McBurney, S. P., Pandey, S., Cheever, T., Sutton, W. F., Kahl, C., Park, B., Zolla-Pazner, S., Haigwood, N. L.
The American Society for Microbiology (ASM)
Published 2018Staff ViewPublication Date: 2018-05-15Publisher: The American Society for Microbiology (ASM)Print ISSN: 0022-538XElectronic ISSN: 1098-5514Topics: MedicinePublished by: -
2Latest Papers from Table of Contents or Articles in PressC. Zhang ; W. Spevak ; Y. Zhang ; E. A. Burton ; Y. Ma ; G. Habets ; J. Zhang ; J. Lin ; T. Ewing ; B. Matusow ; G. Tsang ; A. Marimuthu ; H. Cho ; G. Wu ; W. Wang ; D. Fong ; H. Nguyen ; S. Shi ; P. Womack ; M. Nespi ; R. Shellooe ; H. Carias ; B. Powell ; E. Light ; L. Sanftner ; J. Walters ; J. Tsai ; B. L. West ; G. Visor ; H. Rezaei ; P. S. Lin ; K. Nolop ; P. N. Ibrahim ; P. Hirth ; G. Bollag
Nature Publishing Group (NPG)
Published 2015Staff ViewPublication Date: 2015-10-16Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Animals ; Cell Line, Tumor ; Enzyme Activation/drug effects ; Female ; Genes, ras/genetics ; Heterocyclic Compounds, 2-Ring/adverse effects/pharmacology ; Humans ; Indoles/adverse effects/pharmacology ; MAP Kinase Signaling System/*drug effects/genetics ; Mice ; Mitogen-Activated Protein Kinases/*metabolism ; Models, Biological ; Mutation/genetics ; Protein Kinase Inhibitors/adverse effects/*pharmacology ; Proto-Oncogene Proteins B-raf/*antagonists & inhibitors/genetics ; Sulfonamides/adverse effects/pharmacologyPublished by: -
3Latest Papers from Table of Contents or Articles in PressIan E Munanura; Kenneth F Backman; Jeffrey C Hallo; Robert B Powell; Edwin Sabuhoro
Medknow Publications
Published 2018Staff ViewPublication Date: 2018-07-03Publisher: Medknow PublicationsPrint ISSN: 0972-4923Topics: Energy, Environment Protection, Nuclear Power EngineeringPublished by: -
4Latest Papers from Table of Contents or Articles in PressFitzsimons, T. C., Lewis, J. M., Wright, A., Kleifeld, O., Schittenhelm, R. B., Powell, D., Harper, M., Boyce, J. D.
The American Society for Microbiology (ASM)
Published 2018Staff ViewPublication Date: 2018-07-24Publisher: The American Society for Microbiology (ASM)Print ISSN: 0019-9567Electronic ISSN: 1098-5522Topics: MedicinePublished by: -
5Latest Papers from Table of Contents or Articles in PressSong, K.-A., Hosono, Y., Turner, C., Jacob, S., Lochmann, T. L., Murakami, Y., Patel, N. U., Ham, J., Hu, B., Powell, K. M., Coon, C. M., Windle, B. E., Oya, Y., Koblinski, J. E., Harada, H., Leverson, J. D., Souers, A. J., Hata, A. N., Boikos, S., Yatabe, Y., Ebi, H., Faber, A. C.
The American Association for Cancer Research (AACR)
Published 2018Staff ViewPublication Date: 2018-11-16Publisher: The American Association for Cancer Research (AACR)Print ISSN: 1078-0432Electronic ISSN: 1557-3265Topics: MedicinePublished by: -
6Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2018-06-08Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyGeosciencesComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: PhysicsPublished by: -
7Latest Papers from Table of Contents or Articles in PressPardee, T. S., Anderson, R. G., Pladna, K. M., Isom, S., Ghiraldeli, L. P., Miller, L. D., Chou, J. W., Jin, G., Zhang, W., Ellis, L. R., Berenzon, D., Howard, D. S., Hurd, D. D., Manuel, M., Dralle, S., Lyerly, S., Powell, B. L.
The American Association for Cancer Research (AACR)
Published 2018Staff ViewPublication Date: 2018-05-02Publisher: The American Association for Cancer Research (AACR)Print ISSN: 1078-0432Electronic ISSN: 1557-3265Topics: MedicinePublished by: -
8Articles: DFG German National LicensesRebelsky, L. ; McElfresh, M. W. ; Torikachvili, M. S. ; Powell, B. M. ; Maple, M. B.
[S.l.] : American Institute of Physics (AIP)
Published 1991Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: We report magnetic susceptibility, neutron, and x-ray diffraction measurements on polycrystalline UAu2Si2. Magnetic susceptibility data show the existence of two phases below 50 K. Since no superlattice neutron peaks were observed within the sensitivity of the apparatus we conclude that the system is not a canted ferromagnet, as was suggested earlier. On the basis of the temperature dependence of the neutron and x-ray intensity we discuss a possibility that UAu2Si2 undergoes two structural phase transitions, at 48 and at 18 K and that these transitions are correlated with the magnetic state of the material.Type of Medium: Electronic ResourceURL: -
9Articles: DFG German National LicensesPowell, B. M. ; Pawley, G. S.
College Park, Md. : American Institute of Physics (AIP)
Published 1989Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: The structural characteristics of the β phase of solid nitrogen have been studied for large samples by the molecular-dynamics simulation technique. An effective interatomic potential appropriate to this phase was developed including nonbonded and quadrupole terms. Several properties of the crystal structure have been studied as functions of both temperature and pressure. In particular, a detailed investigation of the molecular orientational order has been made as a function of these parameters. At high temperatures the simulation sample is found to have a hexagonal structure with randomly oriented molecules. As the temperature decreases an orientational ordering transition is found to occur at ≈35 K. The effects of increasing pressure are found to be analogous to those of reducing the temperature. The nature of the local transition in the sample is investigated by calculating correlation parameters which specify twinning and tetrahedral ordering. The variation of the latter indicates that tetrahedral ordering increases strongly with decreasing temperature or increasing pressure, suggesting that the low-temperature phase is a condensation of this arrangement.Type of Medium: Electronic ResourceURL: -
10Articles: DFG German National LicensesDove, M. T. ; Powell, B. M. ; Pawley, G. S. ; Chaplot, S. L. ; Mierzejewski, A.
College Park, Md. : American Institute of Physics (AIP)
Published 1989Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: Phonon dispersion curves have been obtained along the Δ, Σ, and T directions in a single crystal of sym-C6F3Cl3 at 5 K by inelastic neutron scattering measurements. These have been interpreted within the framework of rigid-molecule lattice dynamics. A model intermolecular potential reproduces the overall behavior, but there remains scope for improvement in the model. Other models based on transferable potentials are found to be less satisfactory.Type of Medium: Electronic ResourceURL: -
11Articles: DFG German National LicensesStaff View
ISSN: 1471-4159Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: MedicineType of Medium: Electronic ResourceURL: -
12Articles: DFG German National LicensesStaff View
ISSN: 1471-4159Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: MedicineNotes: Isolated giant serotonin-containing neurons of the cerebral ganglia of Helix pomatia were shown to produce serotonin when incubated with 5-hydroxytryptophan (5-HTP) whereas cells of the buccal ganglia, which are non-amine-containing cells did not. The rate of production was comparable to that for Ach in the isolated neurons of Aplysia. The significance of these results is discussed.Type of Medium: Electronic ResourceURL: -
13Articles: DFG German National LicensesStaff View
ISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: An atom–atom Lennard-Jones (LJ) model for the intermolecular potential of carborane molecules (B10C2H12) is developed and used in a series of classical constant-pressure molecular dynamics simulations of p-, m- and o-carborane crystals, at several temperatures and zero pressure. The potential model reproduces many structural and dynamical properties of these crystals, in particular the high temperature orientationally disordered plastic phase common to the three compounds. This work stresses the need of further experimental data to improve the potential model. © 1996 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
14Articles: DFG German National LicensesGerlach, P. N. ; Powell, B. M.
College Park, Md. : American Institute of Physics (AIP)
Published 1986Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: The crystal structures of the high temperature (paraelastic) and low temperature (ferroelastic) phases of the cyanospinel K2Hg(CN)4 have been determined by neutron powder diffraction. At 298 K the crystal has the spinel structure and the cyanide coordination is ordered in the sequence N–C–Hg–C–N. Below the phase transition (111 K) the structure is trigonal with space group R3¯c. At the transition Hg(CN)4 tetrahedra adjacent along [111] rotate in antiphase as rigid units by ≈7° and the K ion shifts by ≈0.1A(ring). The transition has an ordering wave vector q0≡{1/2 1/2 1/2}. Comparison is made with the structural characteristics of other cyanospinels and it is suggested that the transitions cannot be understood in terms of steric interactions but must be a dynamic effect.Type of Medium: Electronic ResourceURL: -
15Articles: DFG German National LicensesAnderson, R. W. ; Powell, B. J. ; Pashley, D. H.
Oxford, UK : Blackwell Publishing Ltd
Published 1990Staff ViewISSN: 1600-0595Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: MedicineNotes: Abstract The effect on microleakage of varying the powder-to-liquid ratio (P/L) of IRM® used to restore endodontic access preparations was evaluated. Crowns of noncarious, nonrestored extracted human teeth were used in this study. Microleakage was measured using a fluid filtration technique prior to access preparation to obtain control measurements. After access preparation, IRM restorations were placed using P/L of 2, 3, 4, 5, and 6 g/ml, using the manufacturer's recommended dispensing scoop and dropper, and using 2 P/L in a new capsulated IRM delivery system (IRM CAPS). Microleakage measurements were made after various time intervals and after thermal stress. The results indicated that the lower P/L provided the best seals. All groups demonstrated significant microleakage measurements after thermal stress. Significantly greater microleakage measurements were obtained with the P/L of 6 g/ml and the manufacturer's recommended dispensing scoop and dropper. A P/L of 2 g/ml demonstrated less microleakage than the other groups tested.Type of Medium: Electronic ResourceURL: -
16Articles: DFG German National LicensesMorel, P. ; Powell, B. S. ; Rogowsky, P. M. ; Kado, C. I.
Oxford, UK : Blackwell Publishing Ltd
Published 1989Staff ViewISSN: 1365-2958Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: BiologyMedicineNotes: virA gene fusion was used to confirm the reading frame of virA. High nucleotide and amino acid sequence homologies were observed between pTiC58 virA and the virA sequences of three octopine-type plasmids. Strong homologies in amino acid sequence were observed between pTiC58 VirA and seven bacterial proteins which control various regulons. Two hydrophobic domains within VirA are also consistent with a model in which VirA acts as a membrane-bound sensor of plant signal molecules.Type of Medium: Electronic ResourceURL: -
17Articles: DFG German National LicensesStaff View
ISSN: 1365-2958Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: BiologyMedicineNotes: Virulence genes of the Agrobacterium tumefaciens Ti plasmid are positively regulated by the products of virA and virG. To study the DNA-binding properties of the VirG protein, a translational fusion between virG and the frpEgene of Escherichia coli was constructed, and antiserum was raised against the encoded fusion protein. Using this antiserum, a protein of Mr= 29000, a size similar to that calculated from the virG nucleotide sequence, was detected in an E. coli strain harbouring a virG expression vector. Both the VirG protein and the fusion protein were found, by filter-binding and gel retardation analyses, to bind DNA nonspecifically. These data support an existing model for the two-component regulatory systems of bacteria.Type of Medium: Electronic ResourceURL: -
18Articles: DFG German National LicensesMorel, P. ; Powell, B. s. ; Rogowsky, P. M. ; Kado, C. I.
Oxford, UK : Blackwell Publishing Ltd
Published 1990Staff ViewISSN: 1365-2958Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: BiologyMedicineType of Medium: Electronic ResourceURL: -
19Articles: DFG German National LicensesPowell, B. S. ; Powell, G. K. ; Morris, R. O. ; Rogowsky, P. M. ; Kado, C. I.
Oxford, UK : Blackwell Publishing Ltd
Published 1987Staff ViewISSN: 1365-2958Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: BiologyMedicineNotes: The nucleotide sequence of the virG locus of the nopaline type plasmid pTiC58 of Agrobacterium tumefaciens has been determined. It contains an open reading frame (ORF) of 759 nucleotides and has 77% homology to the virG sequences of octopine type plasmids. Differences between the sequences of the two types of Ti plasmids in the region of virG are located predominantly outside the ORF. The amino acid sequences inferred from the two virG genes show 80% homology to each other and each shows the same moderate homologies to amino acid sequences derived from genes in a family of two-component regulatory systems. Specific differences in nucleotide and amino acid sequences as well as a structure-function model for the gene product are discussed.Type of Medium: Electronic ResourceURL: -
20Articles: DFG German National LicensesHawkyard, M. ; Powell, B. E. ; Hussey, I. ; Grabowski, L.
Oxford, UK : Blackwell Publishing Ltd
Published 1996Staff ViewISSN: 1460-2695Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision MechanicsNotes: Abstract— Fatigue crack growth rates in corner notched specimens of forged Ti-6A1-4V, used in the manufacture of rotating aero-engine components, have been measured for fatigue loadings that combine major and minor stress cycles. The loadings are simple representations of the flight cycle and the potential in-flight vibrations, each loading block consisting of high-frequency minor cycles superimposed on the major cycle dwell at maximum load. The crack growth rates are dependent on the number and stress ratio of the minor cycles, but only when they individually contribute to the growth of the crack. Estimates of the fatigue threshold values and near-threshold growth rates associated with the minor cycles have been made, all potential load history effects having been ascribed to the minor cycle component of the loading. Using this data, satisfactory crack propagation life predictions have been demonstrated for a wide range of test conditions involving the conjoint action of major and minor stress cycles.Type of Medium: Electronic ResourceURL: