D. W. Shen

Electronic structure and exotic exchange splitting in spin-density-wave states of BaFe$_2$As$_2$ (2008)

Yang, L. X., Zhang, Y., Ou, H. W., Zhao, J. F., Shen, D. W., Zhou, B., ...

The magnetic properties in the parent compounds are often intimately related to the microscopic mechanism of superconductivity. Here we report the first direct measurements on the electronic...

Novel electronic structure induced by a highly strained oxide interface with incommensurate crystal fields (2008)

Ou, H. W., Zhao, J. F., Zhang, Y., Xie, B. P., Shen, D. W., Zhu, Y., ...

The misfit oxide, Bi$_{2}$Ba$_{1.3}$K$_{0.6}$Co$_{2.1}$O$_{y}$, made of alternating rocksalt-structured [BiO/BaO] layers and hexagonal CoO$_{2}$ layers, was studied by angle-resolved photoemission...

Primary role of the barely occupied states in the charge density wave formation of NbSe2 (2008)

Shen, D. W., Zhang, Y., Yang, L. X., Wei, J., Ou, H. W., Dong, J. K., ...

NbSe2 is a prototypical charge-density-wave (CDW) material, whose mechanism remains mysterious so far. With angle resolved photoemission spectroscopy, we mapped out the CDW gap and recovered the...

Doping-insensitive density-of-states suppression in polycrystalline iron-based superconductor SmO$_{1-x}$F$_{x}$FeAs (2008)

Ou, H. W., Zhang, Y., Zhao, J. F., Wei, J., Shen, D. W., Zhou, B., ...

We investigated the temperature dependence of the density-of-states in the iron-based superconductor SmO_1-xF_xFeAs (x=0, 0.12, 0.15, 0.2) with high resolution angle-integrated photoemission...

Angle integrated photoemission study of SmO$_{0.85}$F$_{0.15}$FeAs (2008)

Ou, H. W., Zhao, J. F., Zhang, Y., Shen, D. W., Zhou, B., Yang, L. X., ...

The electronic structure of the new superconductor, SmO$_{1-x}$F$_x$FeAs ($x=0.15$), has been studied by angle-integrated photoemission spectroscopy. Our data show a sharp feature very close to the...

Superconducting coherence peak in the electronic excitations of a single layer cuprate superconductor $Bi_2 Sr_{1.6} La_{0.4} Cu O_{6+\delta}$ (2008)

Wei, J., Zhang, Y., Ou, H. W., Xie, B. P., Shen, D. W., Zhao, J. F., ...

Angle resolved photoemission spectroscopy study is reported on a high quality optimally doped Bi2Sr1.6La0.4CuO6+delta high Tc superconductor. In the antinodal region with maximal d-wave gap, the...

Evolution of the Electronic Structure of 1T-CuxTiSe2 (2006)

Zhao, J. F., Ou, H. W., Wu, G., Xie, B. P., Zhang, Y., Shen, D. W., ...

The electronic structure of a new charge-density-wave/ superconductor system, 1T-CuxTiSe2, has been studied by photoemission spectroscopy. A correlated semiconductor band structure is revealed for...

A novel mechanism of charge density wave in a transition metal dichalcogenide (2006)

Shen, D. W., Xie, B. P., Zhao, J. F., Yang, L. X., Fang, L., Shi, J., ...

Charge density wave, or CDW, is usually associated with Fermi surfaces nesting. We here report a new CDW mechanism discovered in a 2H-structured transition metal dichalcogenide, where the two...

Inelastic X-Ray Scattering Study of Exciton Properties in an Organic Molecular crystal (2006)

Yang, K., Chen, L. P., Cai, Y. Q., Hiraoka, N., Li, S., Zhao, J. F., ...

Excitons in a complex organic molecular crystal were studied by inelastic x-ray scattering (IXS) for the first time. The dynamic dielectric response function is measured over a large momentum...

High-energy scale revival and giant kink in the dispersion of a cuprate superconductor (2006)

Xie, B. P., Yang, K., Shen, D. W., Zhao, J. F., Ou, H. W., Wei, J., ...

In the present photoemission study of a cuprate superconductor Bi1.74Pb0.38Sr1.88CuO6+delta, we discovered a large scale dispersion of the lowest band, which unexpectedly follows the band structure...

Normal state electronic structure in the heavily overdoped regime of Bi1.74Pb0.38Sr1.88CuO6+delta single-layer cuprate superconductors (2006)

Yang, K., Xie, B. P., Shen, D. W., Zhao, J. F., Ou, H. W., Wei, J., ...

We explore the electronic structure in the heavily overdoped regime of the single layer cuprate superconductor Bi1.74Pb0.38Sr1.88CuO6+delta. We found that the nodal quasiparticle behavior is...

Double minute chromosomes carrying the human multidrug resistance 1 and 2 genes are generated from the dimerization of submicroscopic circular DNAs in colchicine-selected KB carcinoma cells.

Schoenlein, P V, Shen, D W, Barrett, J T, Pastan, I, Gottesman, M M

This study characterizes amplified structures carrying the human multidrug resistance (MDR) genes in colchicine-selected multidrug resistant KB cell lines and strongly supports a model of gene...

Isolation of human mdr DNA sequences amplified in multidrug-resistant KB carcinoma cells.

Roninson, I B, Chin, J E, Choi, K G, Gros, P, Housman, D E, Fojo, A, ...

The ability of tumor cells to develop simultaneous resistance to structurally different cytotoxic drugs constitutes a major problem in cancer chemotherapy. It was previously demonstrated that...

Multidrug resistance of DNA-mediated transformants is linked to transfer of the human mdr1 gene.

Shen, D W, Fojo, A, Roninson, I B, Chin, J E, Soffir, R, Pastan, I, ...

Mouse NIH 3T3 cells were transformed to multidrug resistance with high-molecular-weight DNA from multidrug-resistant human KB carcinoma cells. The patterns of cross resistance to colchicine,...

Protein p53 and inducer-mediated erythroleukemia cell commitment to terminal cell division.

Shen, D W, Real, F X, DeLeo, A B, Old, L J, Marks, P A, Rifkind, R A

Inducer-mediated murine erythroleukemia cell (MELC) differentiation provides a model for examining factors determining terminal cell differentiation. The nuclear protein, p53, has been implicated as...

Double minute chromosomes carrying the human multidrug resistance 1 and 2 genes are generated from the dimerization of submicroscopic circular DNAs in colchicine-selected KB carcinoma cells.

Schoenlein, P V, Shen, D W, Barrett, J T, Pastan, I, Gottesman, M M

This study characterizes amplified structures carrying the human multidrug resistance (MDR) genes in colchicine-selected multidrug resistant KB cell lines and strongly supports a model of gene...

Isolation of human mdr DNA sequences amplified in multidrug-resistant KB carcinoma cells.

Roninson, I B, Chin, J E, Choi, K G, Gros, P, Housman, D E, Fojo, A, ...

The ability of tumor cells to develop simultaneous resistance to structurally different cytotoxic drugs constitutes a major problem in cancer chemotherapy. It was previously demonstrated that...

Multidrug resistance of DNA-mediated transformants is linked to transfer of the human mdr1 gene.

Shen, D W, Fojo, A, Roninson, I B, Chin, J E, Soffir, R, Pastan, I, ...

Mouse NIH 3T3 cells were transformed to multidrug resistance with high-molecular-weight DNA from multidrug-resistant human KB carcinoma cells. The patterns of cross resistance to colchicine,...

Protein p53 and inducer-mediated erythroleukemia cell commitment to terminal cell division.

Shen, D W, Real, F X, DeLeo, A B, Old, L J, Marks, P A, Rifkind, R A

Inducer-mediated murine erythroleukemia cell (MELC) differentiation provides a model for examining factors determining terminal cell differentiation. The nuclear protein, p53, has been implicated as...

Characterisation of high-level cisplatin-resistant cell lines established from a human hepatoma cell line and human KB adenocarcinoma cells: cross-resistance and protein changes.

Shen, D. W., Akiyama, S., Schoenlein, P., Pastan, I., Gottesman, M. M.

Human liver carcinoma cells (BEL-7404) and human KB adenocarcinoma cells were selected by stepwise increases in cisplatin. Drug sensitivity assays indicated that the IC50 value for 7404-CP7.5 cells...

Reduced endocytosis and altered lysosome function in cisplatin-resistant cell lines

Chauhan, S S, Liang, X J, Su, A W, Pai-Panandiker, A, Shen, D W, Hanover, J A, ...

We isolated human KB adenocarcinoma cisplatin-resistant (CP-r) cell lines with multidrug-resistance phenotypes because of reduced accumulation of cisplatin and other cytotoxic compounds such as...