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Search Results: 1 - 10 of 19930 matches for " Ling Hou "
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Thiomethyl Derivatives of Two Oligo(p-phenylene vinylenes) as New Aggregation-Induced Piezofluorochromic Emitters  [PDF]
Xueqing Hou, Jing Ling, Navamoney Arulsamy, Jianqiang Huo
Materials Sciences and Applications (MSA) , 2013, DOI: 10.4236/msa.2013.46043
Abstract:

Two piezochromic fluorescent compounds are prepared by introducing thiomethyl substituents to the peripheralpositions of two related cyano oligo(p-phenylene vinylenes) (CN-OPV). The new derivatives, namely, 1,4-bis[2-cyano-2(4-thiomethylphenyl)ethenyl]benzene (TOPV1) and 1,4-bis(1-cyano-2-(4-thiomethylphenyl)ethenyl) benzene (TOPV2), are characterized by NMR, powder X-ray diffraction data (XRD) and differential scanning calorimetric (DSC) data. UV-Vis and fluorescence spectra are also measured. TOPV1 with the cyano groups farther away from the central aromatic ring is photoluminescent, and on application of pressure exhibits a more obvious color change and higher Stokes shift than those measured for TOPV2. We also observe piezochromic aggregation-induced emission (PAIE) for TOPV2, but TOPV1 does not exhibit any PAIE.

Link Availability Prediction for Cognitive Radio Ad Hoc Networks  [PDF]
Ling Hou, Kai-Hau Yeung, Kin-Yeung Wong
Journal of Computer and Communications (JCC) , 2014, DOI: 10.4236/jcc.2014.26003
Abstract:

One critical issue for routing in cognitive radio ad hoc networks (CRAHNs) is how to select a reliable path for forwarding traffic. This is because mobility may cause radio links to break frequently. The reliability of a path depends on the availability of those links that constitutes the path. In this letter, we present a novel approach to predict the probability of the availability of the link between two cognitive radio nodes. The prediction is achieved by estimating the link activation and spectrum activation probabilities. Our prediction is verified by simulation and proved to be accurate. This study can provide reliability assurance on dynamic routing for cognitive radio ad hoc networks.

Online Effective Identification of Glycopeptide Using Liquid Chromatography Combined with Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FTICR-MS)*  [PDF]
Ling Xin, Li Hou, Yue Zhou, Huiping Wang, Heming Yu
Advances in Bioscience and Biotechnology (ABB) , 2015, DOI: 10.4236/abb.2015.69065
Abstract: The detailed glycan structural analysis of glycoprotein is amenable to glycopeptide enrichment. Here, we develop a simple, effective and economical approach to enrich glycopeptides from proteolytically digested peptide mixtures by chromatographic column packed with graphite carbon and activated charcoal (G/A-column). Glycopeptide from ovalbumin was efficiently enriched by homemade G/A-column using liquid chromatography and the structure of glycopeptide was obtained by tandem mass spectrometry using Fourier transform ion cyclotron resonance mass spectrometry. The results in this study demonstrate that G/A-column can be used to enrich N-glycolpeptides and be benefit for online identification of glycopeptide using LC-MS.
Immunotherapy of tumor by targeting angiogenesis
Jianmei Hou,Ling Tian,Yuquan Wei
Science China Life Sciences , 2004, DOI: 10.1360/04yc0044
Abstract: Tumor growth and metastasis are angiogenesis-dependent. Anti-angiogenic therapy represents a new strategy for the development of anti-cancer therapies. In recent years, there has been made great progress in anti-angiogenic therapy. As far as the passive immunotherapy is concerned, a recombinant humanized antibody to vascular endothelial growth factor (VEGF)-Avastin has been approved by FDA as the first angiogenesis inhibitor to treat colorectal cancer. For active specific immunotherapy, various strategies for cancer vaccines, including whole endothelial cell vaccines, dendritic cell vaccines, DNA vaccines, and peptides or protein vaccines, have been developed to break immune tolerance against important molecules associated with tumor angiogenesis and induce angiogenesis-specific immune responses. This article reviews the angiogenesis-targeted immunotherapy of tumor from the above two aspects.
Numerical Simulations of Nonlinear Dynamics of Electron Cyclotron Maser with a Straight Beam

KONG Ling-Bao,HOU Zhi-Ling,

中国物理快报 , 2011,
Abstract:
The Phenotypic Conversion of Macrophage Detected by FACS in EAE Mice Treated with or without Fasudil  [PDF]
Chunyun Liu, Yong Xie, Yanhua Li, Jiezhong Yu, Ling Feng, Shaowei Hou, Haifei Zhang, Cungen Ma, Baoguo Xiao
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.510B101
Abstract:

We studied the changes of macrophage populations in splenic mononuclear cells of experimental autoimmune ence-phalomyelitis (EAE) mice treated with or without Fasudil. Phenotypic analysis using flow cytometry showed that the levels of TLR4, CD11c and CD40 which represent the type 1 macrophage, were depressed in Fasudil-treated mice. Incontrast, it was observed the expressions of CD200 and CD14 which typify the type 2 macrophage were elevated in Fasudil-treated mice as compared to EAE mice. And we also found that Fasudil at dose of 40 mg/kg alleviated the se-verity of symptom in EAE mice. Based on the evidence that M1 macrophages are neurotoxic and M2 macrophages promote a regenerative growth, indicating that polarization and shifting of macrophages into M2 cells may also play key roles in treatment of EAE.

Air Pollution Index and Precipitation Weekly Circulation Characteristics and Its Possible Influencing Mechanism Analysis over Beijing and Its Adjacent Regions
环北京地区空气污染指数与降水的周循环特征及其影响机制分析

HOU Ling,YAO Zhanyu,
侯灵
,姚展予

大气科学 , 2012,
Abstract: Weekly cycles of some meteorological parameters have been found in many regions around the world; however, the phase and magnitude of these cycles vary greatly with regions and seasons. Based on the routine observational meteorological element data, the air pollution index (API) and NCEP/DOE reanalysis data during 1980-2009 over Beijing and its adjacent regions, the weekly circulation characteristics of API, precipitation, and several other meteorological elements have been analyzed, and a preliminary proof of the possible effects of aerosol on precipitation has been presented in this paper. The study indicates that API shows an evident weekly cycle, which reaches the minimum values on Sunday, and then increases to the maximum values on Wednesday. However, the precipitation frequencies, especially for the light rain frequency, demonstrate a significant weekly change with opposite phase distributions to that of API. As for the 24-hour accumulated precipitation amount, aerosols play a trivial effect on it, and the results are rejected at the 5% significance level. According to the weekly variation characteristics of cloud amount, temperature, relative humidity, atmospheric stability, and wind speed, the results have been concluded that the cycles may be triggered by the accumulation of aerosols which causes the nonadiabatic heating in the lower troposphere, and then results in the changes of cloud and precipitation. This conclusion provides a possible indirect effect mechanism of aerosols.
Molecular dynamics study of helium bubble pressure in titanium

Zhang Bao-Ling,Wang Jun,Hou Qing,

中国物理 B , 2011,
Abstract: In this paper, the pressure state of the helium bubble in titanium is simulated by a molecular dynamics (MD) method. First, the possible helium/vacancy ratio is determined according to therelation between the bubble pressure and helium/vacancy ratio; then the dependences of the helium bubble pressure on the bubble radius at different temperatures are studied. It is shown that the product of the bubble pressure and the radius is approximately a constant, a result justifying the pressure-radius relation predicted by thermodynamics-based theory for gas bubble. Furthermore, a state equation of the helium bubble is established based on the MD calculations. Comparison between the results obtained by the state equation and corresponding experimental data shows that the state equation can describe reasonably the state of helium bubble and thus could be used for Monte Carlo simulations of the evolution of helium bubble in metals.
{4-[5-(4-tert-Butylphenyl)-1,3,4-oxadiazol-2-yl]phenyl}methanol
Yu-Ling Zhao,Zhe Lv,Bin Tian,Zhe Hou
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536810052967
Abstract: In the title compound, C19H20N2O2, the 1,3,4-oxadiazole ring is almost coplanar with the two neighboring benzene rings [dihedral angles = 3.76 (4) and 5.49 (4)°]. In the crystal, molecules are connected by strong intermolecular O—H...N hydrogen bonds, forming chains parallel to the c axis.
Poly[di-μ2-aqua-μ4-chlorido-μ4-(2-mercaptopyrimidine-4,6-diolato-κ4O:O:O′:O′)-disodium(I)]
Bao Li,Wen Li,Ling Ye,Guang-Feng Hou
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810045836
Abstract: In the title coordination polymer, [Na2(C4H3N2O2S)Cl(H2O)2]n, the NaI ion lies on a twofold rotation axis and the chloride anion on an inversion center. The NaI ion is six-coordinated by two O atoms from two zwitterionic 2-mercaptopyrimidine-4,6-diolate ligands (mm2 symmetry), two water O atoms (m symmetry) and two Cl atoms in a distorted octahedral geometry. Adjacent NaI ions are bridged by an olate group, a water molecule and a chloride anion into a three-dimensional network. The crystal structure is further stabilized by N—H...Cl, O—H...O and O—H...S hydrogen bonds.
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