Hong Yang

China CAMC Engineering Co., Ltd., Peping, Beijing, China

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Publications (396)1479.11 Total impact

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    ABSTRACT: Pt epitaxial layer on a nanoparticle with twinned structure and well-defined shape is highly desirable in order to achieve high performance in both catalytic activity and durability towards oxygen reduction reaction (ORR). However, it remains tremendously challenging to produce conformal, heterogeneous, twinned nanostructures due to the high internal strain and surface energy of Pt. In addition, these twinned nanostructures may be subject to degradation in highly corrosive ORR environments due to the high energy of twin boundary. Here we report the synthesis of Au-Pt core-shell star-shaped decahedra bounded mainly by {111} facets, in which Pt shells with controlled thickness epitaxially grew on Au cores with a five-fold twinned structure. The incorporation of amine group decreases the surface energy of Pt by strong adsorption, and thus facilitates the epitaxial growth of Pt on Au core instead of the dendritic growth. In addition, Br- ion could largely stabilize the {111} facets of Pt, which prevent the formation of spherical nanoparticles. The Au-Pt core-shell decahedra with thicker Pt shell exhibited enhanced ORR properties in terms of activity and durability. Specifically, AuPt1.03 star-shaped decahedra achieved the highest mass activity (0.94 mA/μgPt) and area activity (1.09 mA/cm2Pt), which is ~6.7 and 5 times, respectively, as high as those of the commercial Pt/C (ETEK). Significantly, such star-shaped decahedra were highly stable with ~10% loss in area activity and ~20% loss in mass activity after 30,000 CV cycles in O2 saturated acid solution.
    Nano Letters 11/2015; DOI:10.1021/acs.nanolett.5b02960 · 13.59 Impact Factor
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    ABSTRACT: Coxsackievirus A8 (CV-A8), a member of the genus Enterovirus of the family Picornaviridae, can cause a variety of infectious diseases, such as hand, foot and mouth disease (HFMD), herpangina (HA), encephalitis, paralysis, myelitis, and meningitis. This is a first report of complete genome sequences of CV-A8 strains associated with HFMD/HA since the prototype strain Donovan was identified in 1949. The complete genome sequences of eight new CV-A8 strains showed 19.2 %-20.6 % nucleotide differences when compared to the prototype strain Donovan, and 81.5 %-99.9 % similarity to each other. The topology of a polyphyletic tree based on complete capsid protein gene sequences indicated that the new CV-A8 strains and Donovan are monophyletic. However, seven CV-A8 strains clustered with CV-A10 and CV-A2 in the 5'UTR and P2 region, respectively. In the P3 region, three and four CV-A8 strains grouped with CV-A6 and CV-A2, respectively. Seven CV-A8 strains segregated from Donovan and grouped in a separate lineage in the 3'UTR. The strain CVA8/SZ266/CHN/2014 was most similar to EV71 in the nonstructural proteins regions. Phylogenetic analysis classified worldwide CV-A8 isolates into four distinct clusters, and almost all Chinese and Thai CV-A8 strains evolved independently in their respective lineages, which indicated geographical evolution of CV-A8.
    Archives of Virology 10/2015; DOI:10.1007/s00705-015-2646-1 · 2.39 Impact Factor
  • Yung‐Tin Pan · Jianbo Wu · Xi Yin · Hong Yang ·
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    ABSTRACT: Dynamics of thermally induced composition redistribution of sandwich-like Pt-Ni octahedral electrocatalysts was studied in situ using a variable-temperature environmental transmission electron microscope (ETEM). Dislocations were observed and on heating treatment moved toward the surface over time, resulting in an alloy nanoparticle with significant increase Ni content on the surface, which was confirmed by X-ray photoelectron spectroscopy. The thermally treated Pt-Ni octahedral catalysts showed significant improvement in catalyzing oxygen reduction reaction over the as-made nanoparticles, reaching values of 1.4 A/mgPt in mass activity and 4.8 mA/ in area specific activity. Our study shows the important effect of postsynthesis treatment on the optimization of Pt and Ni atomic distribution, thus the catalytic activity and stability; and the power of in situ ETEM in understanding the structural origin of enhanced catalytic performance with atomic level of details. © 2015 American Institute of Chemical Engineers AIChE J, 2015
    AIChE Journal 10/2015; DOI:10.1002/aic.15070 · 2.75 Impact Factor
  • Hao Ran Geng · Shan Shan Miao · She Feng Jin · Hong Yang ·
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    ABSTRACT: A new surface molecularly imprinted polymer (MIP) based on nano-TiO2 was developed using propazine (Pro) as a template molecule, ethyleneglycol dimethacrylate (EGDMA) as a crosslinker, methacrylic acid (MAA) as a functional monomer, and 2,2'-azobis (isobutyronitrile) (AIBN) as an initiator. Structures of the newly synthesized surface MIPs were characterized by Fourier transmission infrared spectrometry (FT-IR), scanning electron microscope (SEM), transmission electron microscope (TEM), and X-ray diffraction (XRD). The MIP had a good adsorption capacity and high recognition selectivity to propazine. Meanwhile, it exhibited a cross-selectivity for simazine (Sim) and atrazine (Atr). The MIPs were used as a solid phase extraction (SPE) material. Concomitant extraction, purification, and determination of three pesticides (Pro, Sim, and Atr) residues in water, soil, and maize plant and grain samples were performed by MIP-SPE coupled with high performance liquid chromatography (HPLC). The highly selective separation and enrichment of Pro, Atr, and Sim from the complex environmental media can be achieved. Thus, the newly developed technique provides an analytical platform to quantify the trace amount of Pro, Sim, and Atr residues in multi environmental media and food source.
    Analytical and Bioanalytical Chemistry 09/2015; DOI:10.1007/s00216-015-9039-x · 3.44 Impact Factor
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    ABSTRACT: This is a report of the complete genomic sequences of two rare group C rotavirus strains RVC/SZ94/CHN/2011 and RVC/SZ272/CHN/2011, isolated from two cases of acute gastroenteritis in Shenzhen, southern China, in 2011. These two strains display a close genetic relationship to 2007 Chinese strain YNR001 and 2008 Japanese strain BK0830.
    Genome Announcements 09/2015; 3(5). DOI:10.1128/genomeA.01014-15
  • Jianbo Wu · Yung-Tin Pan · Dong Su · Hong Yang ·

    08/2015; DOI:10.1007/s40843-015-0072-z
  • Xi Yin · Jianbo Wu · Panpan Li · Miao Shi · Hong Yang ·
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    ABSTRACT: Heat released from the exothermic reaction between amine Heat released from the exothermic reaction between amine (R-NH2) and carboxylic acid (R'-COOH) was systematically utilized to prepare noble metal nanocrystals (NCs) of various shapes in the presence of carbon monoxide (CO). The heating profile of the solution mixtures was controllable by adjusting both the type and ratio of these two kinds of molecules. A maximum heating rate of 20°C/s was achieved. Uniform gold nanowires and nanoparticles were produced by tuning the molar ratio between carboxylic acid and oleylamine (OAm). In addition, concave tetrahedral palladium nanocrystals were also produced. This self-heating method is highly versatile for making a variety of metal nanostructures. It represents a new, potentially scalable and extremely fast production route of metal nanostructures. This novel production route arises from the unique manner in which homogeneous heat releases from ligand-based chemical reactions.
    08/2015; DOI:10.1002/cnma.201500123
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    ABSTRACT: Flexible, charged Pd nanosheets were prepared by using short chain thiolated carboxylic acids and amines. They could wrap around amine or hydroxyl functionalized micron-sized spheres driven by electrostatic interactions. When incubation with HepG2 cells, positively charged cysteamine (CA) functionalized Pd nanosheets exhibited a much higher cytotoxicity, showing more than 80% cell death at 100 ppm than the negatively charged 3-mecaptopropionic acid (MPA) functionalized ones which caused 30% of the cell death. The results show through surface functionalization, Pd nanosheets can be modified to interact differently with HepG2 cancerous cells, resulting in varied cytotoxicity.
    Chemical Communications 07/2015; 51(75). DOI:10.1039/C5CC04727G · 6.83 Impact Factor
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    ABSTRACT: Malathion is an organophosphorous insecticide for controlling insects on fruits and vegetables, miscellaneous household insects, and animal parasites. It is important to develop highly efficient and selective pre-treatment method for analyzing malathion residues in environment and samples from agricultural products based on the molecularly imprinted polymers (MIPs). In this study, we developed a tailor-made MIP method with highly specific recognization to the template. The MIPs were prepared using malathion as a template, methacrylic acid (MAA) as a functional monomer, ethylene glycol dimethacrylate (EGDMA) as a crosslinker, azodiisobutyronitrile (AIBN) as an initiator, and the acetonitrile-chloroform (1:1, v/v) as a porogen. The molecular recognization mechanism of malathion and MAA was evaluated by molecular simulation, ultraviolet spectrometry (UV), and (1)H-nuclear magnetic resonance ((1)H-NMR). MAA interacted specifically with malathion by hydrogen bond with a ratio of 2:1. The MIPs exhibit a high affinity, recognition specificity, and efficient adsorption performance for malathion. The Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), surface area and porosimeter analyzer, thermogravimetric/differential thermal analyzer (TG/DTA) were used to characterize the properties of MIP. The malathion residues in soil, tap water, and cabbage were cleaned up by MIP-SPE, detected quantitatively using GC-FPD, and confirmed by GC-MS/MS. The limits of tap water, soil, and cabbage were confined to 0.001 mg L(-1), 0.004 and 0.004 mg kg(-1), respectively. The spiked recoveries of malathion were 96.06-111.49 % (with RSD being 5.7-9.2 %), 98.13-103.83 % (RSD, 3.5-8.7 %), and 84.94-93.69 % (RSD, 4.7-5.8 %) for tap water, soil, and cabbage samples, respectively. Thus, the method developed here can be used effectively in assessing malathion residues in multiple environmental samples. The aim of the study was to provide an efficient, selective, and accurate method for analyzing malathion at trace levels in multiple media.
    Environmental Monitoring and Assessment 07/2015; 187(7):4641. DOI:10.1007/s10661-015-4641-0 · 1.68 Impact Factor
  • Li Rong Tan · Yi Chen Lu · Jing Jing Zhang · Fang Luo · Hong Yang ·
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    ABSTRACT: Plant cytochrome P450 monooxygenases constitute one of the largest families of protein genes involved in plant growth, development and acclimation to biotic and abiotic stresses. However, whether these genes respond to organic toxic compounds and their biological functions for detoxifying toxic compounds such as herbicides in rice are poorly understood. The present study identified 201 genes encoding cytochrome P450s from an atrazine-exposed rice transcriptome through high-throughput sequencing. Of these, 69 cytochrome P450 genes were validated by microarray and some of them were confirmed by real time PCR. Activities of NADPH-cytochrome P450 reductase (CPR) and p-nitroanisole O-demethylase (PNOD) related to toxicity were determined and significantly induced by atrazine exposure. To dissect the mechanism underlying atrazine modification and detoxification by P450, metabolites (or derivatives) of atrazine in plants were analyzed by ultra performance liquid chromatography mass spectrometry (UPLC/MS). Major metabolites comprised desmethylatrazine (DMA), desethylatrazine (DEA), desisopropylatrazine (DIA), hydroxyatrazine (HA), hydroxyethylatrazine (HEA) and hydroxyisopropylatrazine (HIA). All of them were chemically modified by P450s. Furthermore, two specific inhibitors of piperonyl butoxide (PBO) and malathion (MAL) were used to assess the correlation between the P450s activity and rice responses including accumulation of atrazine in tissues, shoot and root growth and detoxification. Copyright © 2015 Elsevier Inc. All rights reserved.
    Ecotoxicology and Environmental Safety 05/2015; 119:25-34. DOI:10.1016/j.ecoenv.2015.04.035 · 2.76 Impact Factor
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    ABSTRACT: Hand, foot, and mouth disease (HFMD) is caused by human enteroviruses, especially by enterovirus 71 (EV71) and coxsackievirus A16 (CA16). Patients infected with different enteroviruses show varied clinical symptoms. The aim of this study was to determine whether the etiological spectrum of mild and severe HFMD changed, and the association between pathogens and clinical features. From 2009 to 2013, a total of 2,299 stool or rectal specimens were collected with corresponding patient data. A dynamic view of the etiological spectrum of mild and severe HFMD in Shenzhen city of China was provided. EV71 accounted for the majority proportion of severe HFMD cases and fatalities during 2009-2013. CA16 and EV71 were gradually replaced by coxsackievirus A6 (CA6) as the most common serotype for mild HFMD since 2010. Myoclonic jerk and vomiting were the most frequent severe symptoms. Nervous system complications, including aseptic encephalitis and aseptic meningitis were observed mainly in patients infected by EV71. Among EV71, CA16, CA6, and CA10 infection, fever and pharyngalgia were more likely to develop, vesicles on the hand, foot, elbow, knee and buttock were less likely to develop in patients infected with CA10. Vesicles on the mouth more frequently occurred in the patients with CA6, but less in the patient with EV71. Associations between diverse enterovirus serotypes and various clinical features were discovered in the present study, which may offer further insight into early detection, diagnosis and treatment of HFMD. J. Med. Virol. © 2015 Wiley Periodicals, Inc. © 2015 Wiley Periodicals, Inc.
    Journal of Medical Virology 05/2015; 87(9). DOI:10.1002/jmv.24200 · 2.35 Impact Factor
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    ABSTRACT: Background Human cytomegalovirus (CMV) is an opportunistic pathogen that can be treated with ganciclovir. Mutations in the UL97 gene of CMV render the virus ganciclovir resistance. These include H520Q and C603W mutations, against which we developed a novel genotyping assay for their identification.MethodsPCR reactions were performed to amplify fragments of the UL97 gene containing H520Q or C603W mutations. High resolution melting analysis (HRMA) coupled with unlabeled DNA probes was employed to identify the shift in melting temperature of the probe–template complex, which reflexes the presence of point mutations.ResultsMelting point analysis performed on the dimeric DNA of PCR products of UL97 gene could not identify mutations in the gene. When coupled to unlabeled probes, point mutations in UL97 can be identified by analyzing the melting curve of probe–template complex. When WT and mutant UL97 DNAs were mixed together to mimic heterogeneous viral population in clinical samples, the genotyping assay is sensitive enough to detect H520Q and C603W mutants that constitute 10% of total DNA input.Conclusion Probe-based HRMA is effective in detecting H520Q and C603W mutations in the UL97 gene of CMV.
    Journal of Clinical Laboratory Analysis 05/2015; DOI:10.1002/jcla.21858 · 1.04 Impact Factor
  • Li Na Wei · Ping Wu · Fu Rong Wang · Hong Yang ·
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    ABSTRACT: Thifluzamide fungicide is widely used to protect rice (Oryza sativa) against the sheath blight fungus (Rhizoctonia solani). The continuous application of thifluzamide may lead to accumulation in soil and contaminate rice crop. To sustain the environment, it is necessary to assess its accumulation and degradation in field. The method limit of detection (LOD) was 0.022 ng. The limits of quantitation detection (LOQ) were 5.0 μg L−1 in water and 4.0 μg kg−1 in paddy soil and rice crop. In this study, a 2-year (2011-2012) field study was performed to monitor thifluzamide degradation in the rice production areas of Nanjing, Xiaoxian, and Changsha. The degradation dynamics of thifluzamide in paddy water, paddy soil, and rice crop were well described by the first-order kinetics equation. The 2-year average half-lives of thifluzamide in paddy water, paddy soil, and rice crop were 26.19, 17.92, 14.61 days (Nanjing), 15.63, 20.71, 9.10 days (Xiaoxian), and 9.47, 13.92, 10.08 days (Changsha), respectively. Thifluzamide degraded more rapidly in rice crop than in soil and paddy water. The variation in thifluzamide degradation was attributed to the difference in rainfall during the period of rice cultivation. The maximum residue of thifluzamide in brown rice was 0.0303 mg kg−1 in Nanjing and the residue of thifluzamide in brown rice was not detected in other two sites before thifluzamide was applied at pre-harvest. The experimental data demonstrated that thifluzamide recommended dosage of 72 g a.i.ha−1 can be used in rice fields with less than three times within a 30-day time interval.
    Water Air and Soil Pollution 05/2015; 226(5). DOI:10.1007/s11270-015-2387-5 · 1.55 Impact Factor
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    ABSTRACT: This review presents a handful of selective recent examples on the preparation of electrocatalysts that are critical for the development of low temperature hydrogen polymer electrolyte membrane fuel cells (PEMFCs). The emphasis is placed on the following three aspects: first, methods that show the potentials for low-cost production and ease in the development of high-performance membrane electrode assembly (MEA); second, new approaches for the continuous production of well-controlled catalysts; and third, Pt-free electrocatalysts.
    Current Opinion in Chemical Engineering 05/2015; 8:89-97. DOI:10.1016/j.coche.2015.03.005
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    ABSTRACT: We determined the complete genome sequence of a coxsackievirus A16 strain (CVA16/SZ29/CHN/2014) from a fatal case in Shenzhen, southern China, in 2014. The strain was assigned to subgenotype B1b based on phylogenetic analysis of the VP1 gene.
    Genome Announcements 04/2015; 3(2). DOI:10.1128/genomeA.00391-15
  • Hong Yang · Hua Chun Zeng ·

    Current Opinion in Chemical Engineering 04/2015; 8. DOI:10.1016/j.coche.2015.04.004
  • Jianbo Wu · Hong Yang ·
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    ABSTRACT: Heterogeneous catalysts play a pivotal role in the conversion of hydrocarbons, such as natural gas, liquid petroleum and coal, into various value-added chemicals. Catalyst performance can be enhanced through the control of synergistic effect generated by the different surface components, that is, the multifunctional nanostructures including the supports. This chapter discusses a few selected synthetic approaches aiming at the control of such structural parameters relevant to the preparation of heterogeneous catalysts. Organic capping agents play important roles in shape control of colloidal nanocystals. Metal core–shell nanostructures can be obtained when two precursors are mixed from the onset. This strategy is usually used for reaction mixtures with mild reducing agents, as the sequential reduction of two metal precursors depends on the difference in reduction potentials of the metal ions. Underpotential deposition (UPD) is one useful way for the fabrication of metal monolayer on metal nanoparticles.
    Heterogeneous Catalysis at Nanoscale for Energy Applications, 04/2015: pages 9-29; , ISBN: 9780470952603
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    ABSTRACT: WS2 nanosheets were prepared by the solvent-thermal method in the presence of n-butyl lithium, then the exfoliation under the condition of ultrasound. The formed WS2 nanosheets were conjugated with thiol-modified polyethylene glycol (PEG-SH) to improve the biocompatibility. The nanosheets (WS2-PEG) were able to inhibit the growth of a model HeLa cancer cell line in vitro due to the high photothermal conversion efficiency of ∼ 35% irradiated by an 808 nm laser (1 W/cm2). As a proof of concept, WS2-PEG nanosheets with the better X-ray attenuation property than the clinical computed tomography (CT) contrast agent (Iohexol) could be performed for CT imaging of the lymph vessel.
    Chinese Chemical Letters 04/2015; 26(6). DOI:10.1016/j.cclet.2015.03.034 · 1.59 Impact Factor
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    ABSTRACT: Sulfonylurea herbicides are widely used at lower dosage for controlling broad-leaf weeds and some grasses in cereals and economic crops. It is important to develop highly efficient and selective pre-treatment method for analyzing sulfonylurea herbicides residues in environments and samples from agricultural products based on the magnetic molecularly imprinted polymers (MIPs). The MIPs were prepared by surface molecular imprinting technique specially using vinyl-modified Fe3O4@SiO2 nanoparticle as supporting matrix, bensulfuron-methyl (BSM) as template molecule, methacrylic acid (MAA) as a functional monomer, trimethylolpropane trimethacrylate (TRIM) as a cross-linker, and azodiisobutyronitrile (AIBN) as an initiator. The MIPs show a high affinity, recognition specificity, fast mass transfer rate, efficient adsorption performance towards BSM with the adsorption capacity reaching up to 27.17 mg g-1. Furthermore, the MIPs also showed cross-selectivity for herbicides triasulfuron (TS), prosulfuron (PS) and pyrazosulfuron-ethyl (PSE). The MIP solid phase extraction (SPE) column was easier to operate, regenerate and retrieve compared to C18 SPE column. The developed method showed highly selective separation and enrichment of sulfonylurea herbicide residues, which enable its application in the pretreatment of multi-sulfonylurea herbicide residues.
    Journal of Agricultural and Food Chemistry 03/2015; 63(14). DOI:10.1021/jf506239b · 2.91 Impact Factor
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    ABSTRACT: In the textile industry, high salinity waste streams are a challenge urging for the recovery and purification of dyes and salts (e.g., NaCl), requiring a treatment going beyond the classical filtration by e.g., reverse osmosis to produce pure water. In this work, two commercial loose nanofiltration (NF) membranes (Sepro NF 6 and NF 2A, Ultura) are proposed to fractionate dye/salt aqueous mixtures. It was observed that both NF membranes have a salt rejection <33.3% in solutions with 0.1–40.0 g L−1 of NaCl at 6 bar. Furthermore, both membranes have >99.6% retention of direct dyes (direct red 80, direct red 23, and congo red), even though 40.0 g L−1 NaCl is present, indicating salt addition has no obvious impact on the dye retention. The combination of a low salt rejection and a high dye rejection indicates the feasibility for the reuse of salt from fractionation in forward osmosis and bipolar membrane electrodialysis. Application of diafiltration for an aqueous mixture containing direct red 80 (1000 ppm) and NaCl (~20 g L−1) by both membranes demonstrates that above 95% of NaCl is removed from aqueous mixture, and <0.9 g L−1 NaCl remains after the addition of pure water with a volume factor of 4.0 in the feed solution. At the premise of excellent diafiltration performance, concentration as the post-treatment for dye recovery expectedly indicates direct red 80 is concentrated by a factor of 4.0 for both membranes while keeping the salt concentration with a very slight increase. Over 99.9% dye retention in both diafiltration and concentration procedures yields a very high recovery since <0.045% of dye is permeated. These results indicate that loose nanofiltration membranes have potential for dye/salt fractionation.
    Journal of Membrane Science 03/2015; 477. DOI:10.1016/j.memsci.2014.12.008 · 5.06 Impact Factor

Publication Stats

10k Citations
1,479.11 Total Impact Points


  • 2015
    • China CAMC Engineering Co., Ltd.
      Peping, Beijing, China
  • 2012-2015
    • University of Illinois, Urbana-Champaign
      • Department of Chemical and Biomolecular Engineering
      Urbana, Illinois, United States
  • 2008-2015
    • Shanghai Normal University
      Shanghai, Shanghai Shi, China
  • 2007-2015
    • Nanjing Agricultural University
      • College of Sciences
      Nan-ching, Jiangsu Sheng, China
    • Chinese PLA General Hospital (301 Hospital)
      Peping, Beijing, China
  • 2004-2015
    • Shenzhen Center for Disease Control and Prevention
      Shen-ch’üan-shih, Zhejiang Sheng, China
  • 2014
    • State Key Laboratory of Medical Genetics of China
      Ch’ang-sha-shih, Hunan, China
  • 2000-2014
    • Beijing Institute of Microbiology and Epidemiology
      Peping, Beijing, China
  • 2003-2013
    • University of Rochester
      • Department of Chemical Engineering
      Rochester, New York, United States
  • 1999-2013
    • Peking University
      • • Department of Physics
      • • Department of Chemical Biology
      Peping, Beijing, China
  • 2010-2012
    • Dalian Maritime University
      • College of Information Science and Technology
      Lü-ta-shih, Liaoning, China
    • Chongqing Technology and Business University
      Ch’ung-ch’ing-shih, Chongqing Shi, China
  • 2006-2012
    • Wuhan University
      • • Department of Chemical and Environmental Engineering
      • • School of Resources and Environmental Science
      Wu-han-shih, Hubei, China
  • 2005-2012
    • Academy of Military Medical Sciences
      T’ien-ching-shih, Tianjin Shi, China
    • Government of the People's Republic of China
      Peping, Beijing, China
  • 2011
    • Texas Biomedical Research Institute
      San Antonio, Texas, United States
  • 2006-2011
    • Sichuan University
      • State Key Laboratory of Polymer Material Engineering
      Hua-yang, Sichuan, China
  • 2009
    • Beijing Normal University
      Peping, Beijing, China
  • 2006-2009
    • Xuanwu hospital
      Peping, Beijing, China
  • 2004-2007
    • Chinese Academy of Sciences
      Peping, Beijing, China