Search Results - (Author, Cooperation:W. Ge)
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1Latest Papers from Table of Contents or Articles in PressC. Chluba ; W. Ge ; R. Lima de Miranda ; J. Strobel ; L. Kienle ; E. Quandt ; M. Wuttig
American Association for the Advancement of Science (AAAS)
Published 2015Staff ViewPublication Date: 2015-05-30Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsPublished by: -
2Latest Papers from Table of Contents or Articles in PressR. Chowdhury ; R. Sekirnik ; N. C. Brissett ; T. Krojer ; C. H. Ho ; S. S. Ng ; I. J. Clifton ; W. Ge ; N. J. Kershaw ; G. C. Fox ; J. R. Muniz ; M. Vollmar ; C. Phillips ; E. S. Pilka ; K. L. Kavanagh ; F. von Delft ; U. Oppermann ; M. A. McDonough ; A. J. Doherty ; C. J. Schofield
Nature Publishing Group (NPG)
Published 2014Staff ViewPublication Date: 2014-05-13Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Amino Acid Sequence ; Catalytic Domain ; Conserved Sequence ; Eukaryota/classification/*enzymology ; Humans ; *Models, Molecular ; Oxygenases/*chemistry/metabolism ; Phylogeny ; Prokaryotic Cells/classification/*enzymology ; Protein Folding ; Protein Structure, Tertiary ; Ribosomes/*enzymology ; Sequence AlignmentPublished by: -
3Latest Papers from Table of Contents or Articles in PressQ. Zhang ; K. Zhao ; Q. Shen ; Y. Han ; Y. Gu ; X. Li ; D. Zhao ; Y. Liu ; C. Wang ; X. Zhang ; X. Su ; J. Liu ; W. Ge ; R. L. Levine ; N. Li ; X. Cao
Nature Publishing Group (NPG)
Published 2015Staff ViewPublication Date: 2015-08-20Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Acetylation ; Animals ; Chromatin/chemistry/genetics/metabolism ; Colitis/enzymology/immunology/metabolism ; DNA Methylation ; DNA-Binding Proteins/deficiency/*metabolism ; Dendritic Cells/cytology/metabolism ; Down-Regulation/genetics ; Epigenesis, Genetic ; Female ; HEK293 Cells ; Histone Deacetylase 2/*metabolism ; Histones/chemistry/metabolism ; Humans ; I-kappa B Proteins/metabolism ; Inflammation/enzymology/immunology/*metabolism ; Interleukin-6/*antagonists & inhibitors/*biosynthesis/genetics/immunology ; Macrophages/metabolism ; Male ; Mice ; Mice, Inbred C57BL ; Promoter Regions, Genetic/genetics ; Proto-Oncogene Proteins/deficiency/*metabolism ; Transcription, GeneticPublished by: -
4Articles: DFG German National LicensesStaff View
ISSN: 1573-5168Keywords: goldfish ; activin ; inhibin ; receptors ; perifusion ; immunocytochemistry ; cloning ; gene expressionSource: Springer Online Journal Archives 1860-2000Topics: BiologyNotes: Abstract Activin (βAβA, βAβB and βBβB) is a dimeric protein that belongs to the transforming growth factor-β (TGF-β) superfamily of growth factors and is involved in the regulation of many physiological and developmental processes. Recently, we have demonstrated that porcine activin stimulated goldfish gonadotropin-II (GTH-II) and growth hormone (GH) secretion from dispersed pituitary cells in static culture and pituitary fragments in perifusion. The action of activin in the goldfish is unique in that it has an acute stimulatory effect on the secretion of GTH-II and GH, whereas in mammals activin usually exhibits long-term stimulatory actions on FSH secretion. The action mechanism of activin is different from that of gonadotropin-releasing hormone (GnRH). Using domain-specific antibodies against mammalian activin subunits, we subsequently demonstrated the existence of immunoreactive activin subunits (βA and βB) in the goldfish ovary, testis, pituitary and brain, suggesting endocrine, paracrine and autocrine roles for activin in the regulation of goldfish reproduction. Both activin βA and βB subunits have been cloned from goldfish genome by polymerase chain reaction (PCR). Using the PCR fragments as probes, we have cloned a full length cDNA coding for activin βB subunit from the goldfish ovary. Both activin βA and βB subunits show high homology to those of other vertebrates with the βB subunit much more conserved (93 and 98% identity with human and zebrafish βB subunit, respectively). The identity of the cloned βB subunit was further confirmed by expression in the Chinese hamster ovary (CHO) cells and detection of the specific activity of activin in the culture medium. The messenger RNA of activin βB subunit is expressed in a variety of goldfish tissues including ovary, testis, brain, pituitary, kidney and liver, suggesting a wide range of physiological roles for activin in the goldfish. We have also cloned a full length cDNA coding for the activin Type IIB receptor from the goldfish ovary, suggesting that activin may have paracrine or autocrine actions on the ovarian functions. The identity of the cloned receptor was confirmed by specific binding of125 I-activin on COS-1 cells transfected with the cloned Type IIB receptor.Type of Medium: Electronic ResourceURL: -
5Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2018-05-12Publisher: American Physical Society (APS)Print ISSN: 1098-0121Electronic ISSN: 1095-3795Topics: PhysicsKeywords: Semiconductors II: surfaces, interfaces, microstructures, and related topicsPublished by: -
6Latest Papers from Table of Contents or Articles in PressJ. Ge, W. Luo, H. Dong, X. Qiu, H. Liu, H. Wang, Z. Yuan, J. Zhu and H. Zhang
Institute of Physics Publishing (IOP)
Published 2018Staff ViewPublication Date: 2018-09-27Publisher: Institute of Physics Publishing (IOP)Electronic ISSN: 1748-0221Topics: PhysicsPublished by: -
7Latest Papers from Table of Contents or Articles in PressH. Liu, H. Dong, Z. Liu, J. Ge, W. Luo, C. Zhang, Z. Yuan, J. Zhu and H. Zhang
Institute of Physics Publishing (IOP)
Published 2018Staff ViewPublication Date: 2018-09-08Publisher: Institute of Physics Publishing (IOP)Electronic ISSN: 1748-0221Topics: PhysicsPublished by: -
8Latest Papers from Table of Contents or Articles in PressLiu, Y.-M., Fan, H.-R., Deng, S., Zhu, T., Yan, Y., Ge, W.-H., Li, W.-G., Li, F.
The American Society for Pharmacology and Experimental Therapeutics
Published 2018Staff ViewPublication Date: 2018-12-08Publisher: The American Society for Pharmacology and Experimental TherapeuticsPrint ISSN: 0022-3565Electronic ISSN: 1521-0103Topics: MedicinePublished by: -
9Articles: DFG German National LicensesStaff View
ISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: Optical properties of ZnO quantum dots (QDs) capped with polyvinyl pyrrolidone (PVP) molecules have been investigated. It is demonstrated that surface modification by PVP can dramatically change the emission spectra of the ZnO QDs. At the optimized condition with a PVP/Zn2+ ratio of 3:5, the photoluminescence (PL) spectrum of ZnO QDs shows a strong ultraviolet (UV) emission while the low energy green emission is fully quenched. This is a result of the surface passivation of the ZnO QDs by the PVP molecules. The origin of the green emission is attributed to the surface states associated with oxygen vacancies. Temperature and excitation power dependent PL studies suggest that the UV emission is associated with localized states. © 2001 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
10Articles: DFG German National LicensesJiang, P. H. ; Huang, Y. J. ; Ge, W. K. ; Sun, D. Z. ; Zeng, Y. P.
[S.l.] : American Institute of Physics (AIP)
Published 1988Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: If a modulation-doped AlGaAs/GaAs heterostructure is illuminated by light, photoexcitation of deep levels in the GaAs substrate leads to some interesting effects. Below 100 K, the heterostructure shows a persistent photoconductivity effect. Moreover, a strong persistent channel depletion is observed at low temperatures when a small negative voltage is applied to the substrate contact (backgate). The latter effect is explained by a double-layer model of GaAs where the GaAs side of the heterostructure consists of (1) a buffer layer and (2) a semi-insulating substrate. Under illumination, most of the applied negative voltage drops across the very thin buffer layer, and the enhanced electric field in the layer exerts a very strong influence on the conducting channel.Type of Medium: Electronic ResourceURL: -
11Articles: DFG German National LicensesWang, J. N. ; Chen, Z. M. ; Woo, P. W. ; Ge, W. K. ; Wang, Y. Q.
Woodbury, NY : American Institute of Physics (AIP)
Published 1999Staff ViewISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: Intense wide-band photoluminescence (PL) was observed at room temperature from both SiC thin films grown on silicon substrates by hot-filament chemical vapor deposition and anodized SiC thin films formed by electrochemical anodization in HF–ethanol solution. It was found that prolonged irradiation with ultraviolet light from a He–Cd laser (325 nm, 10 mW) generally enhanced the PL intensity of as-grown SiC but induced a new PL band in anodized SiC at room temperature. The light-induced PL emission in anodized SiC was centered at the energy between 2.1 and 2.2 eV in comparison with the initial peak position of about 1.9 eV. These effects were also temperature dependent. © 1999 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
12Articles: DFG German National LicensesFeng, W. ; Wang, Y. ; Wang, J. ; Ge, W. K.
Woodbury, NY : American Institute of Physics (AIP)
Published 1998Staff ViewISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: The low-temperature grown AlGaAs/GaAs multiple quantum well structures were characterized by photoluminescence (PL) spectroscopy. The samples were grown at 270–400 °C and annealed at 500–900 °C. After anneal, photoluminescence quenching was observed for the samples grown at temperatures below 350 °C, and found to show a strong dependence on the growth and anneal temperatures. The luminescence intensity for the PL-quenched sample exhibits a power law dependence on the excitation level with an exponent close to 2, indicating a bimolecular recombination process in parallel with strong nonradiative recombination. The photoluminescence quenching upon anneal is attributed to the formation of arsenic clusters that serve as new nonradiative recombination channels. © 1998 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
13Articles: DFG German National LicensesZhang, Yaohui ; Jiang, D. S. ; Xia, J. B. ; Cui, L. Q. ; Song, C. Y. ; Zhou, Z. Q. ; Ge, W. K.
Woodbury, NY : American Institute of Physics (AIP)
Published 1996Staff ViewISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: A voltage-controlled tunable two-color infrared detector with photovoltaic (PV) and photoconductive (PC) dual-mode operation at 3–5 μm and 8–14 μm using GaAs/AlAs/AlGaAs double barrier quantum wells (DBQWs) and bound-to-continuum GaAs/AlGaAs quantum wells is demonstrated. The photoresponse peak of the photovoltaic GaAs/AlAs/GaAlAs DBQWs is at 5.3 μm, and that of the photoconductive GaAs/GaAlAs quantum wells is at 9.0 μm. When the two-color detector is under a zero bias, the spectral response at 5.3 μm is close to saturate and the peak detectivity at 80 K can reach 1.0×1011 cmHz1/2/W, while the spectral photoresponsivity at 9.0 μm is absolutely zero completely. When the external voltage of the two-color detector is changed to 2.0 V, the spectral photoresponsivity at 5.3 μm becomes zero while the spectral photoresponsivity at 9.0 μm increases comparable to that at 5.3 μm under zero bias, and the peak detectivity (9.0 μm) at 80 K can reach 1.5×1010 cmHz1/2/W. Strictly speaking, this is a real bias-controlled tunable two-color infrared photodetector. We have proposed a model based on the PV and PC dual-mode operation of stacked two-color QWIPs and the effects of tunneling resonance with narrow energy width of photoexcited electrons in DBQWs, which can explain qualitatively the voltage-controlled tunable behavior of the photoresponse of the two-color infrared photodetector. © 1996 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
14Articles: DFG German National LicensesYang, C. L. ; Wang, J. N. ; Ge, W. K.
Woodbury, NY : American Institute of Physics (AIP)
Published 2001Staff ViewISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: Chemically hybridized CdS-poly(N-vinylcarbazole) (PVK) nanocomposites with different molar ratios of CdS to PVK were prepared. A variety of techniques including optical absorption, photoluminescence (PL), photocurrent spectroscopy, and time-resolved PL were employed to investigate the properties of CdS–PVK nanocomposites. A significant enhancement of photoconductivity was observed in CdS–PVK nanocomposites as compared to pure PVK and CdS/PVK nanoblends. We interpret this result as the improved interface quality between CdS and PVK in CdS–PVK nanocomposites, which facilitates fast interfacial carrier transfer and thus increases the charge generation efficiency. © 2001 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
15Articles: DFG German National LicensesTsang, M. S. ; Wang, J. N. ; Ge, W. K.
Woodbury, NY : American Institute of Physics (AIP)
Published 2001Staff ViewISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: Photoluminescence from a GaN0.015As0.985/GaAs quantum well has been measured at 15 K under hydrostatic pressure up to 9 GPa. Both the emissions from the GaNAs well and GaAs barrier are observed. The GaNAs-related peak shows a much weaker pressure dependence compared to that of the GaAs band gap. A group of new peaks appear in the spectra when the pressure is beyond 2.5 GPa, which is attributed to the emissions from the N isoelectronic traps in GaAs. The pressure dependence of the GaNAs-related peaks was calculated using the two-level model with the measured pressure coefficients of the GaAs band gap and N level as fitting parameters. It is found that the calculated results deviate seriously from the experimental data. An increasing of the emission intensity and the linewidth of the GaNAs-related peaks was also observed and briefly discussed. © 2001 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
16Articles: DFG German National LicensesStaff View
ISSN: 0006-291XSource: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: BiologyChemistry and PharmacologyPhysicsType of Medium: Electronic ResourceURL: -
17Articles: DFG German National LicensesStaff View
ISSN: 0016-6480Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: BiologyMedicineType of Medium: Electronic ResourceURL: -
18Articles: DFG German National LicensesStaff View
ISSN: 0016-6480Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: BiologyMedicineType of Medium: Electronic ResourceURL: -
19Articles: DFG German National LicensesStaff View
ISSN: 0022-0248Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Chemistry and PharmacologyGeosciencesPhysicsType of Medium: Electronic ResourceURL: -
20Articles: DFG German National LicensesStaff View
ISSN: 0022-1139Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Chemistry and PharmacologyType of Medium: Electronic ResourceURL: