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Search Results: 1 - 10 of 38030 matches for " LIN Saijun "
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Advances in Anti-tumor Activity of Indole-3-carbinol
Chang GE,Saijun FAN
Chinese Journal of Lung Cancer , 2009,
BRCA1: A New Predictive Genomic Marker for Chemotherapy and Radiotherapy of Non-small Cell Lung Cancer
Min LI,Saijun FAN
Chinese Journal of Lung Cancer , 2012, DOI: 10.3779/j.issn.1009-3419.2012.08.06
Abstract: Non-small cell lung cancer (NSCLC) is one of the most common malignant tumors worldwide. Chemotherapy and radiotherapy are the main methods in therapy of NSCLC. The identification and characterization of predictive markers of radio- and chemo-sensitivity will be beneficial with customized treatment of NSCLC patients. This article will review the evidence regarding breast cancer susceptibility gene 1 (BRCA1) as a new predictive marker for chemotherapy and radiotherapy of NSCLC.
Imaging cold atoms with shot-noise and diffraction limited holography
J. P. Sobol,Saijun Wu
Physics , 2014, DOI: 10.1088/1367-2630/16/9/093064
Abstract: We theoretically develop and experimentally demonstrate a holographic method for imaging cold atoms at the diffraction and photon shot noise limits. Aided by a double point source reference field, a simple iterative algorithm robustly removes the twin image of an $^{87}$Rb cold atom sample during the image reconstruction. Shot-noise limited phase shift and absorption images are consistently retrieved at various probe detunings, and during the laser cooling process. We consistently resolve less than 2 mrad phase shift ($0.4~\%$ attenuation) of the probe light, outperforming shot-noise limited phase-contrast (absorption) imaging by a factor of 4 or more if the same camera is used without pixel saturation. We discuss the possible extension of this work for precise phase imaging of dense atomic gases, and for off-resonant probing of multiple atoms in optical lattices.
Simultaneous determination of five yellow dyes in foods by high performance liquid chromatography coupled with tandem mass spectrometry

LIN Saijun,TU Haiyun,SUN Lan,XIAO Hailong,PAN Xiangrong,MA Xiaoyan,

色谱 , 2011,
Abstract: A method based on high performance liquid chromatography coupled with tandem mass spectrometry (HPLC-MS/MS) was developed for simultaneous determination of five yellow industrial dyes. The separations were performed with an Agilent ODS C18 column at a flow rate of 0.3 mL/min. The mobile phase was 5 mmol/L ammonium acetate (containing 0.1% formic acid)-acetonitrile (3:2, v/v). Under the optimized detection conditions, the linear ranges for Chrysoidine G and Basic Yellow 2 were 5.0~80.0 mg/L, and for Acid Orange I, Acid orangeII and Acid Yellow 36 were 10.0~160.0 μg/L. The limits of quantification for Chrysoidine G, Basic Yellow 2, Acid Orange I, Acid OrangeII and Acid Yellow 36 were 20, 20, 40, 40 and 40 ng/g, respectively. The relative standard deviations of reproducibility of this method for retention time and peak area were no more than 0.50% and 2.14%, respectively. The method was applied to determine the recoveries of the above five dyes in chicken, bean products and yellow croaker were between 79.8%~95.2% with satisfactory results.
Atom interferometry using wavepackets with constant spatial displacements
Edward J. Su,Saijun Wu,Mara Prentiss
Physics , 2006, DOI: 10.1103/PhysRevA.81.043631
Abstract: We demonstrate a standing wave light pulse sequence that places atoms into a superposition of displaced wavepackets with precisely controlled displacements that remain constant for times as long as 1 s. The separated wavepackets are subsequently recombined resulting in atom interference patterns that probe energy differences of approximately 10^-34 J, and can provide acceleration measurements that are insensitive to platform vibrations.
Observation of coherence revival and fidelity saturation in a delta-kicked rotor potential
Saijun Wu,Alexey Tonyushkin,Mara G. Prentiss
Physics , 2008, DOI: 10.1103/PhysRevLett.103.034101
Abstract: We experimentally investigate the effect of atomic $\delta$-kicked rotor potentials on the mutual coherence between wavepackets in an atom interferometer. The differential action of the kicked rotor degrades the mutual coherence, leading to a reduction of the interferometry fringe visibility; however, when the repetition rate of the kicked rotor is at or near the quantum resonance, we observe revival of matter-wave coherence as the number of kicks increases, resulting in non-vanishing coherence in the large kick number limit. This coherence saturation effect reflects a saturation of fidelity decay due to momentum displacements in deep quantum regime. The saturation effect is accompanied with an invariant distribution of matter-wave coherence under the kicked rotor perturbations.
Demonstration of a moving guide based atom interferometer for rotation sensing
Saijun Wu,Edward J. Su,Mara Prentiss
Physics , 2006, DOI: 10.1103/PhysRevLett.99.173201
Abstract: We demonstrate area-enclosing atom interferometry based on a moving guide. Light pulses along the free propagation direction of a magnetic guide are applied to split and recombine the confined atomic matter-wave, while the atoms are translated back and forth along a second direction in 50 ms. The interferometer is estimated to resolve ten times the earth rotation rate per interferometry cycle. We demonstrate a ``folded figure 8'' interfering configuration for creating a compact, large-area atom gyroscope with multiple-turn interfering paths.
Time domain deBroglie wave interferometry along a magnetic guide
Saijun Wu,Edward J. Su,Mara Prentiss
Physics , 2005, DOI: 10.1140/epjd/e2005-00212-8
Abstract: Time domain deBroglie wave interferometry [Cahn et al, Phys. Rev. Lett. 79, 784] is applied to Rb87 atoms in a magnetic guide. A standing wave light field is carefully aligned along the guiding direction of the magnetic trapping potential from a soft-ferromagnetic 4-foil structure. A sequence of two standing wave pulses is applied to the magnetically trapped atoms. The backscattered light at the atomic density grating revival time is collected and detected via a heterodyning technique. In addition to the observed recoil oscillations that fit the interferometer theory for atoms in free space, we observe a decay of the interferometer contrast on a millisecond time scale with unexpected millisecond-scale oscillations. We find that the oscillating decay is explained by a residual variation of the linear trapping potential along the standing wave direction.
Water absorption and mechanical properties of water-swellable natural rubber
Diew Saijun,Charoen Nakason,Azizon Kaesaman,Pairote Klinpituksa
Songklanakarin Journal of Science and Technology , 2009,
Abstract: Water-swellable rubber (WSR) was prepared by blending superabsorbent polymer (SAP) of crosslinked poly(acrylamide-co-sodium acrylate) with natural rubber in latex condition. The crosslinked poly(acrylamide-co-sodium acrylate) was first prepared by inverse suspension polymerization from acrylamide and sodium acrylate monomers with potassiumpersulfate initiator and N,N -methylenebisacrylamide crosslinker. The reaction was carried out at 60oC for 40 mins. Water absorption properties, such as the degree of water absorption, water absorption rate, degree of weight loss, and mechanicalproperties of WSR were then investigated. It was found that the degree of water absorption, water absorption rate, and thedegree of weight loss increased, while tensile strength and elongation at break decreased with increasing quantity of SAP inthe blends. However, the degree of water absorption, degree of weight loss, and elongation at break decreased, but tensilestrength increased with increasing quantity of the N-tert-butyl-2-benzothiazyl sulphenamide (TBBS) accelerator used in thecompounds formulation.
A Weyl function approach to matter-wave coherence and Talbot-Lau effects
Saijun Wu,Pierre S. Striehl,Mara G. Prentiss
Physics , 2007,
Abstract: Weyl functions conveniently describe the evolution of wave coherences in periodic or quadratic potentials. In this work we use Weyl functions to study the ``Talbot-Lau effect'' in a time-domain matter-wave interferometer. A ``displacement diagram'' is introduced to analyze and calculate the matter-wave interference for an atomic cloud in a quadratic potential that interacts with a sequence of short optical standing wave pulses producing an atomic grating echo. Unlike previous treatments, this new approach allows the atomic ensemble to have an arbitrary initial phase-space distribution, and the standing wave grating vectors to span three dimensions. Several examples are discussed to illustrate the convenience of the diagrammatic technique including the following: a two-dimensional Talbot-Lau effect, the shift in the echo time and the recoil phase for the interferometer perturbed by a quadratic potential; and the realization of a time-domain ``Lau effect'' using a pulsed harmonic potential. The diagrammatic technique is applicable to diffraction gratings with arbitrary grating transmission functions. We conclude the paper with a general discussion on the Weyl function representations of matter-wave coherence, and relate the conservation of matter-wave coherence with the conservation of purity that distinguishes decoherence effects from dephasing effects.
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