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  1. No Access

    Chapter

    QP-S — The Electron Acceptor of Succinate Dehydrogenase

    A ubiquinone protein called QP-S accepts electrons from succinate via succinate dehydrogenase (SDH). A method, different from the previously reported one from this laboratory (Biochemistry 19, 3579), produced a n...

    Tsoo E. King, Yan Xu in Cytochrome Systems (1987)

  2. No Access

    Article

    An investigation into the conversion of methanol to hydrocarbons over a SAPO-34 catalyst using magic-angle-spinning NMR and gas chromatography

    13C magic-angle-spinning (MAS) NMR, along with the results of Fourier transform infrared and gas chromatographic analysis, has been used to identify the hydrocarbon products, and to distinguish mobile from stati...

    Yan Xu, Clare P. Grey, John M. Thomas, Anthony K. Cheetham in Catalysis Letters (1990)

  3. No Access

    Article

    Effects of quench rate on the microstructure in melt-spun Nd–Fe–B alloys

    Electron microscope studies have shown significant changes in the microstructure of the Nd14Fe80B6 melt-spun ribbons, depending on the quenching conditions. The average grain size of about 20 nm near the wheel si...

    A. Zaluska, Yan Xu, Z. Altounian, J. O. Ström-Olsen… in Journal of Materials Research (1991)

  4. No Access

    Article

    The KN algebras and the geometrical quantization of heterotic strings

    By means of the KN algebra, the Virasoro and Kac-Moody superalgebras are extended on a genus-g Riemann surface. These are realized in the framework of heterotic superstring with the WZ term coupling the fiber bun...

    Bang-qing Xu, Dian-yan Xu, Chang-giu Chao in International Journal of Theoretical Physics (1993)

  5. No Access

    Article

    (2,0) Heterotic superstring with Wess-Zumino coupling

    By means of the identity operator and vertex operator technique, reparametrization invariance and BRST symmetry are proven for the heterotic string with Wess-Zumino term coupling the fiber bundle. The motion s...

    Bang-qing Xu, Peng Xu, Dianyan Xu… in International Journal of Theoretical Physi… (1994)

  6. No Access

    Article

    Accelerated microwave synthesis of magnesium sulfide with the pro-heating medium of graphite

    Two reaction routes have been tried for the synthesis of magncsium sulfide by applying microwave irradiation. In the first trial, finely ground Mg and S were mixed thoroughly and heated in a microwave oven for...

    Yan Xu, **aoyue **ao in Journal of Materials Research (1995)

  7. Chapter

    High-Level Security Issues in Multimedia/Hypertext Systems

    Multimedia/hypertext systems are growing at an enormous rate. A large variety of trans­actions take place over the Internet. We have today different types of documents available as hypertext on the WWW for the...

    Eduardo B. Fernandez, Krishnakumar R. Nair… in Communications and Multimedia Security II (1996)

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  8. No Access

    Article

    The role of ordered A1-site vacancies in belt nano-domains of Pb1−xBaxNb2O6 (PBN) solid solution

    The order-disorder states of the A-site vacancy of PBN solid solution affected by different thermal treatments were studied with the aid of High Resolution Electron Microscopy (HREM). PBN ceramics around the m...

    **aoyue **ao, Yan Xu, Zhigang Zeng, Zhilun Gui, Longtu Li… in Journal of Materials Research (1996)

  9. No Access

    Article

    Tutorial: Capillary Electrophoresis

    Capillary electrophoresis (CE) is electrophoresis performed in a capillary tube [1–3]. It is the most efficient separation technique available for the analysis of both large and small molecules. The transforma...

    Yan Xu in The Chemical Educator (1996)

  10. No Access

    Article

    Effect of A-site vacancy order-disorder states on diffuse phase transition of the morphotropic phase boundary Pb1−xBaxNb2O6 ferroelectrics

    The effect of A-site vacancy order-disorder states on diffuse phase transition (DPT) of tungsten bronze Pb1−xBaxNb2O6 (PBN) ferroelectrics has been investigated. The A-site vacancy disordered PBN ceramics exhibit...

    **aoyue **ao, Yan Xu, Zhigang Zeng, Zhilun Gui, Longtu Li… in Journal of Materials Research (1996)

  11. No Access

    Article

    Radiating metric, retarded time coordinates of Kerr-Newman-de Sitter black holes and related energy-momentum tensor

    The charged rotating metric in de Sitter space, derived by Mallett and used by Koberlein, is shown incorrect. Mallett’s metric and his energy-momentum tensor do not satisfy the Einstein-Maxwell field equations...

    Dianyan Xu in Science in China Series A: Mathematics (1998)

  12. No Access

    Chapter and Conference Paper

    Supporting Collaborative Work by Process-Based Transaction Model

    Collaborative work presupposes information exchange among participants. In contrast, traditional transaction technologies allow concurrent users to operate on shared data, while providing them with the illusio...

    Tetsuya Furukawa, Haiyan Xu, Yihua Shi in Advances in Database Technologies (1999)

  13. No Access

    Article

    Diode pumped Nd: YVO4 laser at 671 nm with a type-II noncritical phase-matched LBO

    A diode pumped intracavity frequency-doubled Nd: YVO4 laser emitting at 671 nm with a type-II noncritical phase-matched LBO crystal is reported. A maximum output power at 671 nm of 404 mW was obtained under an in...

    Hengli Zhang, Wei Hou, Jianming Wang, Yao Xu, Zuyan Xu… in Chinese Science Bulletin (1999)

  14. No Access

    Chapter and Conference Paper

    2K Q : Resource-Aware Middleware for Active and Configurable Distributed Services

    Rapid growth of distributed services in heterogeneous environments calls for an adaptive and unified QoS framework, which allows flexibility and configurability in distributed service provisioning. In this pap...

    Dongyan Xu, Duangdao Wichadakul, Klara Nahrstedt in Active Middleware Services (2000)

  15. No Access

    Article

    ESR studies of α-hydro p-substituted phenyl nitroxides and correlation analysis of their HFSC values

    Well-resolved ESR spectra of a series of α-hydro p-substituted phenyl nitroxides were obtained in the fast ET reactions of p-substituted anilines with perfluoroacyl peroxides in F113 (CCl2FCClF2) solutions and on...

    Hong-Yan Xu, Zhang-Ke, Yu Zhao, Chen-Lin… in Research on Chemical Intermediates (2000)

  16. No Access

    Chapter

    Implantation and Characterization of Human Breast Carcinomas in SCID Mice

    To establish a better animal model for the study of human breast carcinomas, we investigated the growth and metastatic potential of surgical specimens of human breast carcinomas in SCID mice, using the large a...

    Yan Xu, Stephen B. Edge, Thelma C. Hurd… in Methods in Mammary Gland Biology and Breas… (2000)

  17. No Access

    Article

    Provincial distribution of three HIV-1 resistant polymorphisms (CCR5-Δ32, CCR2-64I, and SDF1-3′ A) in China

    CCR5-Δ32, CCR2-64I, mutants in two chemokine receptors and SDF1-3′A, mutant in a ligand gene, can delay AIDS pathogenesis. The distribution of the three polymorphic loci was studied in 1 046 DNA samples from 2...

    Junhua **ao, Fang Hu, Hongyan Xu, Bing Su… in Science in China Series C: Life Sciences (2000)

  18. No Access

    Article

    Sphingosylphosphorylcholine is a ligand for ovarian cancer G-protein-coupled receptor 1

    Sphingosylphosphorylcholine (SPC) is a bioactive lipid that acts as an intracellular and extracellular signalling molecule in numerous biological processes. Many of the cellular actions of SPC are believed to ...

    Yan Xu, Kui Zhu, Guiying Hong, Weihua Wu, Linnea M. Baudhuin… in Nature Cell Biology (2000)

  19. No Access

    Article

    Developmental changes of NADPH-diaphorase positive structures in the isthmic nuclei of the chick

    Nicotine adenine dinucleotide phosphate-dia- phorase staining was used to study nitric oxide synthase activity and distribution in the midbrain visual structures of white leghorn chick embryos and post-hatched...

    Quan **ao, Hong-Yan Xu, Shu-Rong Wang, G. Lázár in Anatomy and Embryology (2000)

  20. No Access

    Article

    Normal functions and α-Normal Functions

    This paper has studied two open questions about normal functions due to Lappan, and obtained two corresponding results for α-normal functions.

    Yan Xu in Acta Mathematica Sinica (2000)

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