Search Results - (Author, Cooperation:W. Ho)
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1Latest Papers from Table of Contents or Articles in PressBastarache, L., Hughey, J. J., Hebbring, S., Marlo, J., Zhao, W., Ho, W. T., Van Driest, S. L., McGregor, T. L., Mosley, J. D., Wells, Q. S., Temple, M., Ramirez, A. H., Carroll, R., Osterman, T., Edwards, T., Ruderfer, D., Velez Edwards, D. R., Hamid, R., Cogan, J., Glazer, A., Wei, W.-Q., Feng, Q., Brilliant, M., Zhao, Z. J., Cox, N. J., Roden, D. M., Denny, J. C.
American Association for the Advancement of Science (AAAS)
Published 2018Staff ViewPublication Date: 2018-03-16Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyGeosciencesComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: GeneticsPublished by: -
2Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2018-01-28Publisher: BMJ PublishingElectronic ISSN: 2044-6055Topics: MedicineKeywords: Open access, Nursing, NursingPublished by: -
3Latest Papers from Table of Contents or Articles in PressTran, B. X., Boggiano, V. L., Thi Nguyen, H. L., Nguyen, L. H., Nguyen, H. V., Hoang, C. D., Le, H. T., Tran, T. D., Le, H. Q., Latkin, C. A., Thi Vu, T. M., Zhang, M. W., Ho, R. C.
BMJ Publishing
Published 2018Staff ViewPublication Date: 2018-03-23Publisher: BMJ PublishingElectronic ISSN: 2044-6055Topics: MedicineKeywords: Open access, Public healthPublished by: -
4Latest Papers from Table of Contents or Articles in PressLeeman, D. S., Hebestreit, K., Ruetz, T., Webb, A. E., McKay, A., Pollina, E. A., Dulken, B. W., Zhao, X., Yeo, R. W., Ho, T. T., Mahmoudi, S., Devarajan, K., Passegue, E., Rando, T. A., Frydman, J., Brunet, A.
American Association for the Advancement of Science (AAAS)
Published 2018Staff ViewPublication Date: 2018-03-16Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyGeosciencesComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: Cell BiologyPublished by: -
5Latest Papers from Table of Contents or Articles in PressJ. W. Ho ; Y. L. Jung ; T. Liu ; B. H. Alver ; S. Lee ; K. Ikegami ; K. A. Sohn ; A. Minoda ; M. Y. Tolstorukov ; A. Appert ; S. C. Parker ; T. Gu ; A. Kundaje ; N. C. Riddle ; E. Bishop ; T. A. Egelhofer ; S. S. Hu ; A. A. Alekseyenko ; A. Rechtsteiner ; D. Asker ; J. A. Belsky ; S. K. Bowman ; Q. B. Chen ; R. A. Chen ; D. S. Day ; Y. Dong ; A. C. Dose ; X. Duan ; C. B. Epstein ; S. Ercan ; E. A. Feingold ; F. Ferrari ; J. M. Garrigues ; N. Gehlenborg ; P. J. Good ; P. Haseley ; D. He ; M. Herrmann ; M. M. Hoffman ; T. E. Jeffers ; P. V. Kharchenko ; P. Kolasinska-Zwierz ; C. V. Kotwaliwale ; N. Kumar ; S. A. Langley ; E. N. Larschan ; I. Latorre ; M. W. Libbrecht ; X. Lin ; R. Park ; M. J. Pazin ; H. N. Pham ; A. Plachetka ; B. Qin ; Y. B. Schwartz ; N. Shoresh ; P. Stempor ; A. Vielle ; C. Wang ; C. M. Whittle ; H. Xue ; R. E. Kingston ; J. H. Kim ; B. E. Bernstein ; A. F. Dernburg ; V. Pirrotta ; M. I. Kuroda ; W. S. Noble ; T. D. Tullius ; M. Kellis ; D. M. MacAlpine ; S. Strome ; S. C. Elgin ; X. S. Liu ; J. D. Lieb ; J. Ahringer ; G. H. Karpen ; P. J. Park
Nature Publishing Group (NPG)
Published 2014Staff ViewPublication Date: 2014-08-29Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Animals ; Caenorhabditis elegans/*cytology/*genetics ; Cell Line ; Centromere/genetics/metabolism ; Chromatin/chemistry/*genetics/*metabolism ; Chromatin Assembly and Disassembly/genetics ; DNA Replication/genetics ; Drosophila melanogaster/*cytology/*genetics ; Enhancer Elements, Genetic/genetics ; Epigenesis, Genetic ; Heterochromatin/chemistry/genetics/metabolism ; Histones/chemistry/metabolism ; Humans ; Molecular Sequence Annotation ; Nuclear Lamina/metabolism ; Nucleosomes/chemistry/genetics/metabolism ; Promoter Regions, Genetic/genetics ; Species SpecificityPublished by: -
6Latest Papers from Table of Contents or Articles in PressY. Jiang ; Y. N. Zhang ; J. X. Cao ; R. Q. Wu ; W. Ho
American Association for the Advancement of Science (AAAS)
Published 2011Staff ViewPublication Date: 2011-07-19Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsPublished by: -
7Latest Papers from Table of Contents or Articles in PressSantacroce, A., Wastesson, J. W., Höhn, A., Christensen, K., Oksuzyan, A.
BMJ Publishing Group
Published 2018Staff ViewPublication Date: 2018-05-11Publisher: BMJ Publishing GroupPrint ISSN: 0143-005XElectronic ISSN: 1470-2738Topics: MedicinePublished by: -
8Latest Papers from Table of Contents or Articles in PressTominski, C., Lösekann-Behrens, T., Ruecker, A., Hagemann, N., Kleindienst, S., Mueller, C. W., Höschen, C., Kögel-Knabner, I., Kappler, A., Behrens, S.
The American Society for Microbiology (ASM)
Published 2018Staff ViewPublication Date: 2018-04-17Publisher: The American Society for Microbiology (ASM)Print ISSN: 0099-2240Electronic ISSN: 1098-5336Topics: BiologyPublished by: -
9Latest Papers from Table of Contents or Articles in PressC. L. Chiang ; C. Xu ; Z. Han ; W. Ho
American Association for the Advancement of Science (AAAS)
Published 2014Staff ViewPublication Date: 2014-05-24Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsPublished by: -
10Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2018-01-25Publisher: BMJ Publishing GroupPrint ISSN: 0022-2593Electronic ISSN: 1468-6244Topics: MedicineKeywords: Open accessPublished by: -
11Latest Papers from Table of Contents or Articles in PressZhou, R., Wang, X., Liu, H., Guo, L., Su, Q., Wang, H., Vasiliadis, T., Ho, W., Li, J.
The American Society for Microbiology (ASM)
Published 2018Staff ViewPublication Date: 2018-02-27Publisher: The American Society for Microbiology (ASM)Print ISSN: 0022-538XElectronic ISSN: 1098-5514Topics: MedicinePublished by: -
12Latest Papers from Table of Contents or Articles in PressNelson, V. L., Nguyen, H. C. B., Garcia-Canaveras, J. C., Briggs, E. R., Ho, W. Y., Di; Spirito, J. R., Marinis, J. M., Hill, D. A., Lazar, M. A.
Cold Spring Harbor Laboratory Press
Published 2018Staff ViewPublication Date: 2018-08-02Publisher: Cold Spring Harbor Laboratory PressPrint ISSN: 0890-9369Topics: BiologyPublished by: -
13Articles: DFG German National LicensesStaff View
ISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: The lattice constants of Nd14Fe78−xMnxC8 compounds decrease with the increase of Mn context x and have a minimum at about x=14. The Curie temperature Tc decreases linearly and falls off below room temperature beyond x=14. The strong reduction of the saturation magnetization and Tc are attributed to the antiparallel alignment of the Mn and Fe atoms moments. The behavior of magnetization and magnetization reversal in the high-Mn-containing samples at low temperature can be interpreted by the narrow domain wall effect. The relationship of the intrinsic coercive force i Hc on temperature agrees well with the exponential formula of the narrow Bloch wall.Type of Medium: Electronic ResourceURL: -
14Articles: DFG German National LicensesThoms, B. D. ; Lorraine, P. W. ; Ho, W.
College Park, Md. : American Institute of Physics (AIP)
Published 1992Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: The interaction of a molecular beam of ethane with the Si(111)7×7 surface has been studied using electron energy loss spectroscopy (EELS), low energy electron reflectivity (LEER), and temperature programmed desorption (TPD). Dissociative adsorption of ethane is not observed on this surface at 〈90 K for incident energies up to 1.5 eV and nozzle temperature of 1000 K. Ethane adsorbs molecularly on Si(111)7×7 at 〈80 K in submonolayer coverages and forms multilayers at temperatures below 66 K. The monolayer is found to desorb with first order kinetics with an activation energy of 0.25 eV and pre-exponential factor of 1014±1 s−1. At normal incidence, the probability of trapping is found to decrease with increasing translational energy, falling by a factor of 10 as the incident energy is increased from 0.1 to 1.5 eV. The data are fit by a hard cube model with an effective surface mass of 100 amu, which is between three and four times the mass of a silicon atom. For impact energies (approximately-greater-than)0.8 eV, trapping is observed to be higher than would be expected from the hard cube model. Possible explanations for this deviation are discussed. The trapping probability is found to obey total energy scaling. Changes in the internal energy of the ethane due to variations in the nozzle temperature from 300 to 1000 K are observed to produce negligible effects on the trapping probability.Type of Medium: Electronic ResourceURL: -
15Articles: DFG German National LicensesLorraine, P. W. ; Thoms, B. D. ; Machonkin, R. A. ; Ho, W.
College Park, Md. : American Institute of Physics (AIP)
Published 1992Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: The interaction of CO2 molecules with the Si(111)7×7 surface for translational energies between 0.2 and 1.6 eV and varying vibrational energies has been studied with time-resolved electron-energy-loss spectroscopy (TREELS), temperature-programed desorption, and Auger electron spectroscopy. Energy from the normal component of translational motion has been found to strongly increase the dissociation probability of CO2 on the surface. TREELS has been used to tentatively identify the resulting surface complex as O on a Si adatom with CO bonded in a bridging site to a next-layer Si rest atom. This complex decomposes at 400 K to a surface oxide and gas-phase CO. In addition, vibrational excitation has been found to increase the initial sticking coefficient for normal translational energies less than 0.5 eV.Type of Medium: Electronic ResourceURL: -
16Articles: DFG German National LicensesStaff View
ISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: The relative yield of photoinduced desorption from NO-exposed Si(111)7×7 has been measured as a function of photon power, wavelength, polarization, incident angle, and coverage of coadsorbed potassium. The results are analyzed in terms of two possible mechanisms: direct photoelectronic excitation of the NO-surface complex and interaction of hot carriers photogenerated in the substrate with the NO-surface complex. The substrate-mediated mechanism is found to be principally responsible for the photoreactions.Type of Medium: Electronic ResourceURL: -
17Articles: DFG German National LicensesSo, S. K. ; Franchy, R. ; Ho, W.
College Park, Md. : American Institute of Physics (AIP)
Published 1989Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: The adsorption of NO on Ag(111) at 80 K has been studied by high resolution electron energy loss spectroscopy (HREELS) and thermal desorption spectroscopy (TDS). At low exposures (≤0.05 L) NO is adsorbed in part dissociatively and in part molecularly in two different threefold bridge states (in upright and bent or tilted orientation with respect to the surface normal). The NO molecules in the threefold bridge position are desorbed at 100 K. With increasing exposure the desorption temperature shifts gradually to 110 K. At medium exposures (∼0.13 L) additional NO is adsorbed molecularly in an atop position with an upright orientation in admixture with atomic N and O and molecular NO adsorbed in threefold bridge states. The NO molecules adsorbed in atop position are weakly bonded on the surface and are desorbed at about 90 K. Simultaneously, N2O is formed and adsorbed on the surface. At saturation a new bent or tilted NO species in atop position appears on the surface and the amount of N2O significantly increases. The N2O molecules are desorbed at 90, 110, and 190 K. At saturation all the NO and NO-derived species (the threefold bridge and atop states, N2O and atomic oxygen and nitrogen) coexist on Ag(111).Type of Medium: Electronic ResourceURL: -
18Articles: DFG German National LicensesWhitman, L. J. ; Richter, L. J. ; Gurney, Bruce A. ; Villarrubia, J. S. ; Ho, W.
College Park, Md. : American Institute of Physics (AIP)
Published 1989Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: The CO adsorption site occupations on Fe(111) have been determined as a function of coverage and temperature using temperature programmed desorption (TPD) and time-resolved electron energy loss spectroscopy (TREELS). CO does not adsorb in a thermally equilibrated distribution among the four adsorption sites at 100 K; selective adsorption occurs due to different coverage and temperature dependent sticking probabilities. Upon heating, the nonequilibrium distribution relaxes via CO site changes. At (approximate)250 K and moderate coverage, CO adsorbed in the on-top site changes to the bridge-like shallow hollow site. A heating rate variation analysis yielded an activation barrier E=4.5±0.5 kcal mol−1 and effective first order preexponential ν1=101.5±0.5 s−1 for this process. A similar site change from the deep hollow to the shallow hollow occurs at low coverage near 160 K. Dissociation occurs at (approximate)300 K when all CO are adsorbed in the shallow hollow site. With low coverages the dissociation reaction occurs with E=20±5 kcal mol−1 and ν1=1011±2 s−1. The resulting adsorbed atomic C and O recombinatively desorb at (approximate)760 K with E(approximate)48 kcal mol−1 and ν2(approximate)0.1 cm2 s−1. At higher coverages, in addition to dissociation, some of the CO in the shallow hollow desorb, with E(approximate)32 kcal mol−1 and ν1(approximate)1017 s−1.Type of Medium: Electronic ResourceURL: -
19Articles: DFG German National LicensesStaff View
ISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: The adsorption, desorption, and dissociation of NO on potassium-precovered Rh(100) have been characterized for T ≥100 K and potassium coverages θK≤0.5 ML (1 ML≡1 NO/surface Rh) with low energy electron diffraction (LEED), Auger electron spectroscopy (AES), work function change (Δφ) measurements, temperature programmed reaction spectroscopy (TPRS), and time resolved electron energy loss spectroscopy (TREELS). The saturation NO coverage increases monotonically with θK from 0.4 ML with a K-free surface to 0.8 ML when θK =0.41 ML, and the initial sticking probability increases by up to (approximate)30%. K precoverage promotes the dissociation of NO; the percentage of a saturation NO coverage that dissociates during TPRS increases monotonically with θK from 75% to 100%. Combined with the larger saturation NO coverage, this effect increases nearly threefold the maximum amount of NO that can be dissociated on the surface. The adsorption of NO is characterized by two molecular species, the side-on bonded (or highly inclined) dissociation precursor α1NO (νN–O (approximate)115 meV on the K-free surface) and the vertically bonded desorption precursor α2NO (νN–O (approximate)200 meV on the K-free surface), the populations of which have been determined as a function of both θNO and θK via TREELS. The θNO and θK dependence of the adsorption and reaction of NO on both K-free and precovered surfaces, as evidenced by the α1NO and α2NO populations and N–O loss energies, can be qualitatively understood in terms of a competition for surface electrons; electrophilic α1NO is stabilized (destabilized) with respect to α2NO by an increase (decrease) in the surface electron density caused by coadsorbed K (NO, N, or O). In the presence of K, which is observed to perturb all NO adsorption sites including the next-nearest neighbor, the stabilization is enhanced when the surface electron cloud extends towards the vacuum (θK 〉0.1 ML), but diminished by strong dipole fields emanating from charged K adatoms (θK 〈0.1 ML). The heating rate variation method has been combined with TREELS to determine the α1NO dissociation kinetics in the low coverage limit. Surprisingly, coadsorption with 0.14 ML K reduces the dissociation rate; although the activation energy is reduced from 10.5±0.7 to 4.5±0.4 kcal mol−1, there is a compensating decrease in the effective first order preexponential from 1011.8±0.7 to 102.9±0.5 s−1. Similar results are observed when θK =0.17 ML. In light of the measured kinetics, the K promotion of dissociation is attributed to the stabilization of the dissociation precursor α1NO; when coadsorbed with 〉0.1 ML K essentially all the NO dissociates for all initial NO coverages, independent of the α1NO dissociation rate (which may actually be reduced), because the conversion of α1NO to α2NO is hindered and the reorientation of α2NO is facilitated. We conclude that the stabilization of side-on bonded (or highly inclined) adsorption states and its effect on precursor mediated dissociation is a general phenomenon. Contrary to previous assumptions, we find that the promotion of dissociation is not necessarily due to an increase in the dissociation rate.Type of Medium: Electronic ResourceURL: -
20Articles: DFG German National LicensesTranslational and internal energy distributions of CO photochemically desorbed from oxidized Ni(111)Asscher, M. ; Zimmermann, F. M. ; Springsteen, L. L. ; Houston, P. L. ; Ho, W.
College Park, Md. : American Institute of Physics (AIP)
Published 1992Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: The first translational,rotational and vibrational energy resolved study of CO desorption from epitaxically grown NiO(111) at 70 K in photochemistry study is reporeted. (AIP)Type of Medium: Electronic ResourceURL: