Now showing items 172-191 of 1196

    • Daptomycin Resistance in Enterococci Is Associated with Distinct Alterations of Cell Membrane Phospholipid Content 

      Mishra, Nagendra N.; Bayer, Arnold S.; Tran, Truc T.; Shamoo, Yousif; Mileykovskaya, Eugenia; Dowhan, William; Guan, Ziqiang; Arias, Cesar A. (2012)
      Background: The lipopeptide antibiotic, daptomycin (DAP) interacts with the bacterial cell membrane (CM). Development of DAP resistance during therapy in a clinical strain of Enterococcus faecalis was associated with ...
    • Daptomycin-Resistant Enterococcus faecalis Diverts the Antibiotic Molecule from the Division Septum and Remodels Cell Membrane Phospholipids 

      Tran, Truc T.; Panesso, Diana; Mishra, Nagendra N.; Mileykovskaya, Eugenia; Guan, Ziqianq; Munita, Jose M.; Reyes, Jinnethe; Diaz, Lorena; Weinstock, George M.; Murray, Barbara E.; Shamoo, Yousif; Dowhan, William; Bayer, Arnold S.; Arias, Cesar A. (2013)
      Treatment of multidrug-resistant enterococci has become a challenging clinical problem in hospitals around the world due to the lack of reliable therapeutic options. Daptomycin (DAP), a cell membrane-targeting cationic ...
    • Dark Matter Results from 225 Live Days of XENON100 Data 

      The XENON100 collaboration; Shagin, P. (2012-11)
      We report on a search for particle dark matter with the XENON100 experiment, operated at the Laboratori Nazionali del Gran Sasso for 13 months during 2011 and 2012. XENON100 features an ultralow electromagnetic background ...
    • Decomposition of Phragmites australis litter retarded by invasive Solidago canadensis in mixtures: an antagonistic non-additive effect 

      Zhang, Ling; Zhang, Yaojun; Zou, Jianwen; Siemann, Evan (2014)
      Solidago canadensis is an aggressive invader in China. Solidago invasion success is partially attributed to allelopathic compounds release and more benefits fromAMfungi, which potentially makes the properties of Solidago ...
    • Defining and resolving current systems in geospace 

      Ganushkina, N.Y.; Liemohn, M.W.; Dubyagin, S.; Daglis, I.A.; Dandouras, I.; De Zeeuw, D.L.; Ebihara, Y.; Ilie, R.; Katus, R.; Kubyshkina, M.; Milan, S.E.; Ohtani, S.; Ostgaard, N.; Reistad, J.P.; Tenfjord, P.; Toffoletto, F.; Zaharia, S.; Amariutei, O. (2015)
      Electric currents flowing through near-Earth space (R≤12RE) can support a highly distorted magnetic field topology, changing particle drift paths and therefore having a nonlinear feedback on the currents themselves. A ...
    • Deformation of a Trapped Fermi Gas with Unequal Spin Populations 

      Partridge, G.B.; Li, Wenhui; Liao, Y.A.; Hulet, R.G.; Haque, M.; Stoof, H.T.C. (2006)
      The real-space densities of a polarized strongly interacting two-component Fermi gas of Li6 atoms reveal two low-temperature regimes, both with a fully paired core. At the lowest temperatures, the unpolarized core deforms ...
    • Deformation of Indian Ocean lithosphere: Evidence for a highly nonlinear rheological law 

      Gordon, Richard G.; Houseman, Gregory A. (2015)
      The width of diffuse oceanic plate boundaries is determined by the rheology of oceanic lithosphere. Here we apply thin viscous sheet models, which have been successfully applied to deformation in several continental deforming ...
    • Degenerate Fermi Gas of 87Sr 

      DeSalvo, B.J.; Yan, M.; Mickelson, P.G.; Martinez de Escobar, Y.N.; Killian, T.C. (2010-07-13)
      We report quantum degeneracy in a gas of ultracold fermionic Sr87 atoms. By evaporatively cooling a mixture of spin states in an optical dipole trap for 10.5 s, we obtain samples well into the degenerate regime with ...
    • Deletion of liaR Reverses Daptomycin Resistance in Enterococcus faecium Independent of the Genetic Background 

      Panesso, Diana; Reyes, Jinnethe; Gaston, Elizabeth; Deal, Morgan; Londoño, Alejandra; Nigo, Masayuki; Munita, Jose M.; Miller, William; Shamoo, Yousif; Tran, Truc T.; Arias, Cesar A. (2015)
      We have shown previously that changes in LiaFSR, a three-component regulatory system predicted to orchestrate the cell membrane stress response, are important mediators of daptomycin (DAP) resistance in enterococci. Indeed, ...
    • Delivery of nanoparticles to brain metastases of breast cancer using a cellular Trojan horse 

      Choi, Mi-Ran; Bardhan, Rizia; Stanton-Maxey, Katie J.; Badve, Sunil; Nakshatri, Harikrishna; Stantz, Keith M.; Cao, Ning; Halas, Naomi J.; Clare, Susan E. (2012)
      As systemic cancer therapies improve and are able to control metastatic disease outside the central nervous system, the brain is increasingly the first site of relapse. The bloodヨbrain barrier (BBB) represents a major ...
    • Density matrix embedding from broken symmetry lattice mean fields 

      Bulik, Ireneusz W.; Scuseria, Gustavo E.; Dukelsky, Jorge (2014)
      Several variants of the recently proposed density matrix embedding theory (DMET) [G. Knizia and G. K-L. Chan, Phys. Rev. Lett. 109, 186404 (2012)] are formulated and tested. We show that spin symmetry breaking of the lattice ...
    • The Density of States Measure of the Weakly Coupled Fibonacci Hamiltonian 

      Damanik, David; Gorodetski, Anton (2012)
      We consider the density of states measure of the Fibonacci Hamiltonian and show that, for small values of the coupling constant V , this measure is exact-dimensional and the almost everywhere value dV of the local ...
    • Dephasing of G-band phonons in single-wall carbon nanotubes probed via impulsive stimulated Raman scattering 

      Kim, J.-H.; Yee, K.-J.; Lim, Y.-S.; Booshehri, L.G.; Haroz, E.H.; Kono, J. (2012)
      We study the coherent dynamics of G-band phonons in single-wall carbon nanotubes through impulsive stimulated Stokes and anti-Stokes Raman scattering. The probe energy dependence of the phonon amplitude as well as the ...
    • Depinning transition of bubble phases in a high Landau level 

      Wang, Xuebin; Fu, Hailong; Du, Lingjie; Liu, Xiaoxue; Wang, Pengjie; Pfeiffer, L.N.; West, K.W.; Du, Rui-Rui; Lin, Xi (2015)
      In the higher Landau levels (N>0) a reentrant integer quantum Hall effect (RIQHE) state, which resides at fractional filling factors but exhibits integer Hall plateaus, has been previously observed and studied extensively. ...
    • Depinning transition of bubble phases in a high Landau level 

      Wang, Xuebin; Fu, Hailong; Du, Lingjie; Liu, Xiaoxue; Wang, Pengjie; Pfeiffer, L.N.; West, K.W.; Du, Rui-Rui; Lin, Xi (2015)
      In the higher Landau levels (N>0) a reentrant integer quantum Hall effect (RIQHE) state, which resides at fractional filling factors but exhibits integer Hall plateaus, has been previously observed and studied extensively. ...
    • Description and performance of track and primary-vertex reconstruction with the CMS tracker 

      Adair, A.; Akgun, B.; Ecklund, K.M.; Geurts, F.J.M.; Li, W.; Michlin, B.; Padley, B.P.; Redjimi, R.; Roberts, J.; Zabel, J. (2014)
      A description is provided of the software algorithms developed for the CMS tracker both for reconstructing charged-particle trajectories in proton-proton interactions and for using the resulting tracks to estimate the ...
    • Detecting antiferromagnetism of atoms in an optical lattice via optical Bragg scattering 

      Corcovilos, T.A.; Baur, S.K.; Hitchcock, J.M.; Mueller, E.J.; Hulet, R.G. (2010)
      Antiferromagnetism of ultracold fermions in an optical lattice can be detected by Bragg diffraction of light, in analogy to the diffraction of neutrons from solid-state materials. A finite sublattice magnetization will ...
    • DETECTION OF SPECTRAL EVOLUTION IN THE BURSTS EMITTED DURING THE 2008–2009 ACTIVE EPISODE OF SGR J1550−5418 

      Von Kienlin, Andreas; Gruber, David; Kouveliotou, Chryssa; Granot, Jonathan; Baring, Matthew G.; Gogus, Ersin; Huppenkothen, Daniela; Kaneko, Yuki; Lin, Lin; Watts, Anna L.; Bhat, Narayana P.; Guiriec, Sylvain; Van Der Horst, Alexander J.; Bissaldi, Elisabetta; Greiner, Jochen; Meegan, Charles A.; Paciesas, William S.; Preece, Robert D.; Rau, Arne (2012)
      In early 2008 October, the soft gamma repeater SGR J1550−5418 (1E 1547.0−5408, AX J155052−5418, PSR J1550−5418) became active, emitting a series of bursts which triggered the Fermi Gamma-ray Burst Monitor (GBM) after ...
    • Determination of Ligand Pathways in Globins: Apolar Tunnels Versus Polar Gates 

      Salter, Mallory D.; Blouin, George C.; Soman, Jayashree; Singleton, Eileen W.; Dewilde, Sylvia; Moens, Luc; Pesce, Alessandra; Nardini, Marco; Bolognesi, Martino; Olson, John S. (2012)
      Background: O2 pathways in animal hemoglobins and myoglobins are controversial. Results: Ligands enter and exit sperm whale Mb and Cerebratulus lacteus Hb by completely different pathways. Conclusion: Rational mutagenesis ...
    • Determination of the top-quark pole mass and strong coupling constant from the tt production cross section in pp collisions at √s = 7 TeV 

      Adair, A.; Akgun, B.; Ecklund, K.M.; Geurts, F.J.M.; Li, W.; Michlin, B.; Padley, B.P.; Redjimi, R.; Roberts, J.; Zabel, J. (2014)
      The inclusive cross section for top-quark pair production measured by the CMS experiment in proton–proton collisions at a center-of-mass energy of 7 TeV is compared to the QCD prediction at next-to-next-to-leading order ...