Search Results - (Author, Cooperation:Q. Zhong)
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1Latest Papers from Table of Contents or Articles in PressQ. Zhong, D. N. Christodoulides, M. Khajavikhan, K. G. Makris, and R. El-Ganainy
American Physical Society (APS)
Published 2018Staff ViewPublication Date: 2018-02-23Publisher: American Physical Society (APS)Print ISSN: 1050-2947Electronic ISSN: 1094-1622Topics: PhysicsKeywords: Fundamental conceptsPublished by: -
2Latest Papers from Table of Contents or Articles in PressZ. Tang ; M. G. Lin ; T. R. Stowe ; S. Chen ; M. Zhu ; T. Stearns ; B. Franco ; Q. Zhong
Nature Publishing Group (NPG)
Published 2013Staff ViewPublication Date: 2013-10-04Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Animals ; *Autophagy/genetics ; Cell Line ; Centrioles/*metabolism ; Cilia/genetics/metabolism/*physiology ; Gene Knockdown Techniques ; HEK293 Cells ; Humans ; MCF-7 Cells ; Mice ; Protein Transport ; Proteins/genetics/*metabolismPublished by: -
3Latest Papers from Table of Contents or Articles in PressJ. Diao ; R. Liu ; Y. Rong ; M. Zhao ; J. Zhang ; Y. Lai ; Q. Zhou ; L. M. Wilz ; J. Li ; S. Vivona ; R. A. Pfuetzner ; A. T. Brunger ; Q. Zhong
Nature Publishing Group (NPG)
Published 2015Staff ViewPublication Date: 2015-02-18Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Adaptor Proteins, Vesicular Transport/*chemistry/*metabolism ; *Autophagy ; Endosomes/*metabolism ; HEK293 Cells ; HeLa Cells ; Humans ; Lysosomes/*metabolism ; *Membrane Fusion ; Phagosomes/chemistry/*metabolism ; Protein Binding ; Protein Multimerization ; Protein Structure, Tertiary ; Qa-SNARE Proteins/metabolism ; Qb-SNARE Proteins/metabolism ; Qc-SNARE Proteins/metabolism ; R-SNARE Proteins/metabolism ; SNARE Proteins/chemistry/metabolismPublished by: -
4Articles: DFG German National LicensesZhong, Q.-M. ; Arrott, A. S. ; Heinrich, B. ; Celinski, Z.
[S.l.] : American Institute of Physics (AIP)
Published 1990Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: Surface magneto-optical Kerr effect is used to measure magnetic hysteresis loops for Ni-Fe bilayers previously studied by ferromagnetic resonance [Phys. Rev. 38, 12879 (1988)]. The approach to saturation in the [11] direction confirms the existence of enhanced fourfold in-plane magnetic anisotropy, attributed to the effect of arrays of misfit dislocations arising during the epitaxial growth of bcc Ni overlayers on ultrathin layers of bcc (001)Fe. The [11] magnetization curves for 10 monolayers (ML) of Ni on 7 ML of Fe shows a breaking of symmetry between positive and negative fields. This is ascribed to spin configurations frozen during growth.Type of Medium: Electronic ResourceURL: -
5Articles: DFG German National LicensesInniss, D. ; Zhong, Q. ; Vengsarkar, A. M. ; Reed, W. A. ; Kosinski, S. G. ; Lemaire, P. J.
Woodbury, NY : American Institute of Physics (AIP)
Published 1994Staff ViewISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: Thermally treated and uv-exposed hydrogen-loaded germanosilicate fibers are profiled with an atomic force microscope after cleaving the fiber in the exposed region and etching the cleaved endface in hydrofluoric acid. Thermally treated fibers etch symmetrically throughout the core region, but the uv-exposed fibers etch differently. In the uv-exposed fibers, both the etch depth and the refractive index are asymmetric. They are highest at the core-cladding interface on the side exposed to the uv radiation. We propose that a photolytic process increases the refractive index across the entire core, but the asymmetry is the result of transient heating due to uv absorption. Furthermore, we demonstrate that uniform circumferential exposure symmetrizes the etch depth and refractive index change and reduces the induced birefringence.Type of Medium: Electronic ResourceURL: -
6Articles: DFG German National LicensesIgnatiev, A. ; Zhong, Q. ; Chou, P. C. ; Zhang, X.
Woodbury, NY : American Institute of Physics (AIP)
Published 1997Staff ViewISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: Thick superconducting films of YBa2Cu3O7−δ grown by photoassisted metalorganic chemical vapor deposition that have shown a decrease of Jc with increasing thickness (〉1 μm) have been exposed to ion irradiation in an attempt to enhance Jc. A 4.5 μm thick film irradiated with 1 MeV protons at a dose of 3×1014/cm2 has shown an increase of Jc by a factor of nearly 20–1.7×106 A/cm2 corroborating the proposal that a lack of pinning centers in the grown thick films, due to their high crystalline quality, contributed to the observed decrease of Jc with increasing film thickness. © 1997 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
7Articles: DFG German National LicensesBeyer, J. ; Zhong, Q. ; Schurig, TH.
Woodbury, NY : American Institute of Physics (AIP)
Published 2000Staff ViewISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: An approach for the localization and characterization of electrically active defects in multicrystalline silicon and of artefacts in photovoltaic devices is presented. The essential idea of the method is the noninvasive magnetic detection of photocurrents generated in the sample by local illumination. Magnetic imaging with high spatial and magnetic resolution is performed by scanning the sample under investigation and synchronously measuring the magnetic field of the photocurrents using highly sensitive superconducting quantum interference device magnetometers. The technique enables the nondestructive and nonpolluting detection and investigation of electrically active grain boundaries in multicrystalline silicon wafers. Results obtained from photovoltaic devices show that typical, performance-limiting defects can be localized, as they cause distinct features in the magnetic field topography. © 2000 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
8Articles: DFG German National LicensesHurley, S. M. ; Zhong, Q. ; Castleman, A. W.
College Park, Md. : American Institute of Physics (AIP)
Published 2000Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: The dynamics of the interaction of the Rydberg E(1Σ+) state and the valence state V(1Σ+) of HBr and DBr were investigated using a reflectron time-of-flight mass spectrometer coupled with a femtosecond laser system. Interrogation of the state formed by the avoided crossing of the Rydberg and valence states revealed dynamic behavior that was different for the two isotopes. Pump–probe experiments on HBr showed no change in the lifetime over the range of pump wavelengths of 256.7–254.7 nm. However, the lifetime of DBr decreased as the pump wavelength was tuned bluer. Tunneling is involved in the evolution of the population in photoexcited Rydberg state to the ion-pair state. © 2000 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
9Articles: DFG German National LicensesZhong, Q. ; Poth, L. ; Castleman, A. W.
College Park, Md. : American Institute of Physics (AIP)
Published 1999Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: Because of the dispute in the literature over the dissociation rate and energy partitioning of the acetone molecule upon photoexcitation to the S1 state (π*←n) and 3s Rydberg state (3s←n), we have remeasured the lifetime of acetone (also d6-acetone) on the S1 and 3s surfaces by a femtosecond time-resolved multiphoton ionization technique, coupled with a reflectron time-of-flight mass spectrometer. The measured dissociation rate of acetone on the S1 surface is prompt, and the acetyl radical is long lived. The lifetime of acetone on the 3s surface is measured to be 3.2±0.4 ps (6.0±0.5 ps for d6-acetone). The dissociation rate of acetyl is approximately 1.7 ps (2.5 ps for d3-acetyl) from the curve fitting. This agrees well with the Rice–Ramsperger–Kassel–Marcus theory predicted lifetime of 1.0 ps (1.9 ps for d3-acetyl) when the internal excitation energy of the acetyl radical is treated by a statistical-adiabatic-impulsive model. © 1999 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
10Articles: DFG German National LicensesPoth, L. ; Zhong, Q. ; Ford, J. V. ; Castleman, A. W.
College Park, Md. : American Institute of Physics (AIP)
Published 1998Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: The photodissociation dynamics of methyl iodide clusters using λ=270 nm as pump and λ=405 nm as probe are studied using a femtosecond two color pump–probe laser arrangement combined with a reflectron time-of-flight (RTOF) mass spectrometer. This enables the A˜ state and 10s Rydberg state of methyl iodide to be accessed with the pump beam. Of particular interest is a comparison of the femtosecond dynamics of the methyl iodide monomer with the clustered species. Clocking of the monomer dissociation shows a transient which is indicative of a fast C–I bond breakage as is to be expected upon excitation of methyl iodide into the fast dissociating A˜ state, or into the predissociative 10s Rydberg state. Clusters, however, show a very different pump–probe transient composed of a fast decay and a subsequent dip in ion signal followed by a rise for pump–probe delay times greater than 2 ps. The cluster ion signal shows an enhancement for pump probe delay times up to 70 ps. The results are interpreted in terms of the electronic state diagram of the methyl iodide monomer and effects resulting from clustering of these species, shifts of electronic energy levels and caging of excited species in the cluster. © 1998 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
11Articles: DFG German National LicensesFord, J. V. ; Zhong, Q. ; Poth, L. ; Castleman, A. W.
College Park, Md. : American Institute of Physics (AIP)
Published 1999Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: The study of the interaction of femtosecond laser radiation with matter, especially clusters, has blossomed in recent years due to advances in laser technology. One aspect of this interaction is Coulomb explosion. This effect occurs when the repulsive energy of like charges, known as Coulomb repulsion, overcomes the cluster's total cohesive energy, causing the cluster to disintegrate into charged fragments. In this study, the interactions of methyl iodide clusters, formed in a supersonic expansion using argon and helium as carrier gases, were investigated at 795 nm using a Ti:Sapphire femtosecond laser. The resulting atomic and cluster ions were analyzed in a reflection time-of-flight mass spectrometer. The focus of these studies was the elucidation of the effects of carrier gas and laser wavelength on the laser-cluster interactions leading to Coulomb explosion. To achieve these goals, the effects of different carrier gases, laser power, cluster distribution, and the resulting Coulomb explosion energies were examined. A secondary consideration was to examine the experimental results with regard to the Coherent Electron Motion and Ionization Ignition models. © 1999 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
12Articles: DFG German National LicensesStaff View
ISSN: 1750-3841Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionProcess Engineering, Biotechnology, Nutrition TechnologyNotes: Tap water and 1% CMC solutions were heated in a 40.68 MHz, 30 kW continuous flow radio frequency unit. Temperatures at different vertical and radial locations were monitored by fiber optic probes during batch heating of tap water and 1% CMC solution. Temperatures at different locations were similar during batch heating of tap water, while a significant temperature difference was observed for 1% CMC solutions, with the temperature close to the wall being higher than that at the center. Similar trends were observed during continuous heating of tap water and 1% CMC solutions, with Twall 〉 TR/2 〉 Tcenter for the latter. The observations were a result of different dielectric properties of these 2 fluids, as well as the fluid flow characteristics during continuous heating.Type of Medium: Electronic ResourceURL: -
13Articles: DFG German National LicensesStaff View
ISSN: 0013-4686Keywords: Li-ion cells ; carbon anodes ; intercalation ; lithium intercalated carbon.Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Chemistry and PharmacologyPhysicsType of Medium: Electronic ResourceURL: -
14Articles: DFG German National LicensesStaff View
ISSN: 0039-6028Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: PhysicsType of Medium: Electronic ResourceURL: -
15Articles: DFG German National LicensesStaff View
ISSN: 0039-6028Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: PhysicsType of Medium: Electronic ResourceURL: -
16Articles: DFG German National LicensesStaff View
ISSN: 0009-2614Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Chemistry and PharmacologyPhysicsType of Medium: Electronic ResourceURL: -
17Articles: DFG German National LicensesNishino, Y. ; Kameoka, M. ; Okada, Y. ; Zhong, Q. ; Kimura, T. ; Azuma, I. ; Ikuta, K.
Amsterdam : ElsevierStaff ViewISSN: 0264-410XKeywords: Env ; Gag ; Human immunodeficiency virus ; cytotoxic T lymphocyte ; delayed-type hypersensitivitySource: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: MedicineType of Medium: Electronic ResourceURL: -
18Articles: DFG German National LicensesStaff View
ISSN: 0167-2738Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: PhysicsType of Medium: Electronic ResourceURL: -
19Articles: DFG German National LicensesStaff View
ISSN: 0167-2584Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: PhysicsType of Medium: Electronic ResourceURL: -
20Articles: DFG German National LicensesStaff View
ISSN: 0040-6031Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Chemistry and PharmacologyType of Medium: Electronic ResourceURL: