Hui Li

Central South University, Ch’ang-sha-shih, Hunan, China

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Publications (343)1082.12 Total impact

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    ABSTRACT: A fluorescence turn-on thrombin aptasensor using polyA-based AuNP probe is presented.•Utility of polyA-based nanoconjugates for protein bioassays is first demonstrated.•A divide-and-conquer strategy was applied to destroy the strong AuNP-polyA interaction.•I− and were first adopted to detach the polyA-tailed DNA strands from AuNP surface.•Fluorescence turn-on bioassay was achieved using iodide-induced ligand displacement.
    Biosensors & Bioelectronics 04/2015; 66. · 6.45 Impact Factor
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    ABSTRACT: Relative stability of geometric magic-number gold nanoclusters with high point-group symmetry (Ih, D5h, Oh) and size up to 3.5 nm, as well as structures obtained by global optimization using an empirical potential, is investigated using density functional theory (DFT) calculations. Among high-symmetry nanoclusters, our calculations suggest that from Au(147) to Au(923), the stability follows the order Ih > D5h > Oh. However, at the largest size of Au(923), the computed cohesive energy differences among high-symmetry Ih, D5h and Oh isomers are less than 4 meV/atom (at PBE level of theory), suggesting the larger high-symmetry clusters are similar in stability. This conclusion supports a recent experimental demonstration of controlling morphologies of high-symmetry Au(923) clusters ( Plant , S. R. ; Cao , L. ; Palmer , R. E. J. Am. Chem. Soc. 2014 , 136 , 7559 ). Moreover, at and beyond the size of Au(549), the face-centered cubic-(FCC)-based structure appears to be slightly more stable than the Ih structure with comparable size, consistent with experimental observations. Also, for the Au clusters with the size below or near Au(561), reconstructed icosahedral and decahedral clusters with lower symmetry are slightly more stable than the corresponding high-symmetry isomers. Catalytic activities of both high-symmetry and reconstructed Ih-Au(147) and both Ih-Au(309) clusters are examined. CO adsorption on Au(309) exhibits less sensitivity on the edge and vertex sites compared to Au(147), whereas the CO/O2 coadsorption is still energetically favorable on both gold nanoclusters. Computed activation barriers for CO oxidation are typically around 0.2 eV, suggesting that the gold nanoclusters of ∼2 nm in size are highly effective catalysts for CO oxidation.
    Nano letters. 12/2014;
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    ABSTRACT: Deficits in gamma-aminobutyric acid (GABA) inhibitory neurotransmission have been associated with pathophysiological mechanisms underlying schizophrenia. However, little is known about whether these deficits occur before or after the onset of psychosis. We recruited 16 drug-naive subjects at ultra-high risk of psychosis (UHR), 17 schizophrenia patients and 28 healthy controls. Cortical inhibition was determined using transcranial magnetic stimulation (TMS) over the left primary motor cortex. TMS markers such as short-interval cortical inhibition (SICI), cortical silent period (CSP) and intracortical facilitation (ICF) were obtained from each subject. While SICI can reflect GABA type A (GABAA) mediated inhibition, CSP is thought to indicate GABA type B (GABAB) mediated inhibitory circuits. As compared with healthy controls, UHR subjects showed a prolonged CSP with no change in SICI, whereas schizophrenia patients demonstrated both a prolonged CSP and a reduced SICI. No group differences were found for ICF. CSP in schizophrenia patients also had a positive correlation with positive symptom score of the positive and negative symptom scale (PANSS). Cortical inhibitory deficits among UHR subjects were relatively limited compared to those among schizophrenia patients. Alterations might occur in some subgroup of GABA-mediated neurotransmitter systems before the onset of psychosis, while alterations in both GABAA and GABAB networks might contribute to full-blown psychosis. Copyright © 2014 Elsevier B.V. All rights reserved.
    Schizophrenia Research 12/2014; 160(1-3):124-30. · 4.59 Impact Factor
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    ABSTRACT: In this paper, we develop a facile strategy for fabricating a yolk-shell structured catalytic system that consists of a core made of Ru supported on mesoporous carbon, which is encaged within a silica shell that has ordered radial mesochannels. A region-selective etching mechanism for the formation of the yolk-shell nanoarchitectures is proposed based on the stronger adsorption ability of the carbon core for etching agent than that of the silica shell for etching agent. By combining such material with amyloglucosidase, one-pot hydrolysis-hydrogenation of dextrin to sorbitol can be conducted, delivering enhanced efficiency and showing great promise for biomass conversion applications.
    ACS Applied Materials & Interfaces 11/2014; · 5.90 Impact Factor
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    ABSTRACT: Adsorption geometry of dye molecules on nanocrystalline TiO2 plays a central role in dye-sensitized solar cells, enabling effective sunlight absorption, fast electron injection, optimized interface band offsets, and stable photovoltaic performance. However, precise determination of dye binding geometry and proportion has been challenging due to complexity and sensitivity at interfaces. Here employing combined vibrational spectrometry and density functional calculations, we identify typical adsorption configurations of widely adopted cyanoacrylic donor-π bridge-acceptor dyes on nanocrystalline TiO2. Binding mode switching from bidentate bridging to hydrogen bonded monodentate configuration with Ti-N bonding has been observed when dye sensitizing solution becomes more basic. Raman and infrared spectroscopy measurements confirm this configuration switch and determine quantitatively the proportion of competing binding geometries, with vibration peaks assigned using density functional theory calculations. We further found that the proportion of dye binding configurations can be manipulated by adjusting pH value of dye sensitizing solutions. Controlling molecular adsorption density and configurations lead to enhanced energy conversion efficiency from 2.4% to 6.1% for the fabricated dye-sensitized solar cells, providing a simple method to improve photovoltaic performance by suppressing unfavorable binding configurations in solar cell applications.
    ACS Applied Materials & Interfaces 11/2014; · 5.90 Impact Factor
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    ABSTRACT: The ever emerging demands on miniaturization of electronic devices have pushed the development of innovative materials with desired properties. One major endeavor is the development of organic or organic-inorganic hybrid based electronics as alternatives or supplements to silicon-based devices. Herein we demonstrate the first observation of the co-existence of resistance-switching and ferroelectricity in a metal-organic framework (MOF) materials, [InC16H11N2O8](1.5H2O), denoted as RSMOF-1. Electrical resistance of RSMOF-1 can be turned on and off repeatedly with a current ratio of 30. First-principle molecular dynamics simulation suggests that the resistive switching effect is related to the ferroelectric transition of N∙∙∙H-O∙∙∙H-N bridge-structured dipoles of the guest water molecules and the amino-tethered MOF nano-channel. The discovery of the resistive switching effect and ferroelectricity in MOFs offers great potential for the physical implementation of novel electronics for the next generation digital processing and communication.
    Journal of the American Chemical Society 11/2014; · 10.68 Impact Factor
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    ABSTRACT: Water transport through a two-dimensional nanoporous membrane has attracted increasing attention in recent years thanks to great demands in water purification and desalination applications. However, few studies have been reported on the microscopic mechanisms of water transport through structured nanopores, especially at the atomistic scale. Here we investigate the microstructure of water flow through two-dimensional model graphene membrane containing a variety of nanopores of different size by using molecular dynamics simulations. Our results clearly indicate that the continuum flow transits to discrete molecular flow patterns with decreasing pore sizes. While for pores with a diameter ≥15 Å water flux exhibits a linear dependence on the pore area, a nonlinear relationship between water flux and pore area has been identified for smaller pores. We attribute this deviation from linear behavior to the presence of discrete water flow, which is strongly influenced by the water-membrane interaction and hydrogen bonding between water molecules.
    The Journal of chemical physics. 11/2014; 141(18):18C528.
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    ABSTRACT: We report on a Kondo effect on Co/Sb(111) mediating topological protection of the surface states against local magnetic perturbations. A sharp scanning tunneling spectroscopic peak near the Fermi energy is interpreted as a fingerprint of the Kondo resonance with a high Kondo temperature of about 200 K. Density function theory calculations reveal that the protruding Co adatoms are responsible for the Kondo peak, while the underneath Co atoms present as nonmagnetic impurities. By identifying the quasiparticle interference wavevectors, we demonstrate that only scattering channels related to backscattering confinements are observed for surfaces with and without the Co adsorption. It suggests that the Kondo effect suppresses the backscattering of the topological surface states and may help to expand the functionality of magnetically coupled topological materials for spintronics applications.
    ACS Nano 10/2014; · 12.03 Impact Factor
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    ABSTRACT: Reduced gray matter volume in left superior temporal gyrus (STG) is considered to be associated with auditory P300 amplitude in schizophrenia. Little is known about possible pathological circuits regarding sub-regions of STG that contribute to auditory P300 abnormality in schizophrenia. The current study investigated gray matter volume in STG and functional connectivity of Heschl's gyrus in first-episode schizophrenia (FESZ), as well as their correlations with P300 amplitude.
    Schizophrenia Research 10/2014; · 4.59 Impact Factor
  • Hui Li, Danke Xu
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    ABSTRACT: Silver nanoparticles (AgNPs) have attracted increasing attention for applications in bioanalytical chemistry because of their unique optical, electrical, chemical and catalytic properties. The review describes the properties of AgNPs and covers recent developments in bioanalytical applications based on the electrochemical, optical and catalytic properties of AgNPs.
    TrAC Trends in Analytical Chemistry 10/2014; · 6.35 Impact Factor
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    ABSTRACT: In this paper, we develop a simple vesicle-assisted chemical reduction approach for synthesizing hollow Ni-Co-B nanospheres. With various characterizations, the resulting Ni-Co-B nanospheres are identified to be amorphous alloys with a hollow chamber. Coexistence of NiII and CoII species play a significant role in fabricating hollow nanospheric structures, because only solid nanoparticles can be obtained in the presence of mono-metallic precursor. During liquid-phase hydrogenation of 2-ethyl-2-hexenaldehyde, hollow Ni-Co-B catalyst displays significant bi-site catalysis from bimetals and delivers much greater activity as well as better selectivity than those associated with the dense Ni-Co-B catalyst. Additionally, this catalyst is also easily handled in liquid phase reaction due to its lower density and magnetic property. The material design concept present in this work opens a new avenue for the development of hollow non-noble metallic nanospheres and will draw more attention in the foreseeable future.
    J. Mater. Chem. A. 09/2014;
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    ABSTRACT: Panic disorder (PD) is a common type of anxiety disorder, characterized by unexpected and repeated panic attacks or fear of future panic attacks, or both. Individuals with PD are often resistant to pharmacological or psychological treatments and this can lead to the disorder becoming a chronic and disabling illness. Repetitive transcranial magnetic stimulation (rTMS) can deliver sustained and spatially selective current to suppress or induce cortical excitability, and its therapeutic effect on pathological neuronal activity in people with PD has already been examined in case studies and clinical trials. However, a systematic review is necessary to assess the efficacy and safety of rTMS for PD.
    Cochrane database of systematic reviews (Online) 09/2014; 9:CD009083. · 5.70 Impact Factor
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    ABSTRACT: With a significant advance in ciphertext searchability, public-key encryption with keyword search (PEKS) guarantees both security and convenience for outsourced keyword search over ciphertexts. In this paper, we establish static index (SI) and dynamic index (DI) for PEKS to make search efficient and secure in the state of the art. Suppose there are uu senders to generate nn searchable ciphertexts for ww keywords. The search complexity of PEKS always is O(n)O(n) for each query, even if the keyword has been searched for multiple times. It is obviously inefficient for massive searchable ciphertexts. Fortunately, SI and DI help PEKS lowering the burden respectively in two phases: if the queried keyword is the first time to be searched, apply SI to reduce the complexity from O(n)O(n) to O(u⋅w)O(u⋅w); otherwise, apply DI to reduce the complexity from O(n)O(n) to O(w)O(w). Because DI is invalid for the first time search on any keyword, SI and DI are simultaneously applied with PEKS to complete our work as the secure hybrid indexed search (SHIS) scheme. Since u≪w≪nu≪w≪n in practice, our SHIS scheme is significantly more efficient than PEKS as demonstrated by our analysis. In the end, we show the extension of SHIS to multi-receiver applications, which is absent for pure PEKS.
    Future Generation Computer Systems 08/2014; · 2.64 Impact Factor
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    ABSTRACT: To explore the presence, frequency and clinical value of myeloid-derived suppressor cells (MDSCs) in peripheral blood of patients with small cell lung cancer (SCLC). Flow cytometry using antibodies against CD11b, CD33, CD14 or HLA-DR was conducted to explore the unique cell surface markers of MDSCs and statistical analysis was performed to explore the correlation of MDSCs and clinical features. MDSCs were present in 36 patients with SCLC and uniquely marked by CD11b and CD33-positive, but HLA-DR-negative on cell surfaces and possessed mononuclear phenotype. The levels of CD11b(+)CD33(+)HLA-DR(-)cells (MDSCs) in the SCLC patients and healthy controls were (26.87 ± 6.87)% and (11.04 ± 3.76)%, respectively, with a statistically significant difference (P < 0.001). MDSCs level was significantly associated with clinical stage and tumor distant metastasis (P < 0.05) , but not with age, sex, smoking status and performance status. The later was the clinical stage, the higher was the MDSCs level (r = 0.665, P < 0.001). The level of MDSCs was higher in SCLC patients with distant metastasis than in those without metastasis (r = 0.489, P = 0.003). The level of MDSCs was higher before treatment than after treatment and the difference was statistically significant (P = 0.003). The results of our study demonstrate the existence of MDSCs in SCLC patients and the MDSCs level is associated with SCLC stage, metastasis and treatments. MDSCs might be a novel biomarker for early diagnosis and prognosis for SCLC patients.
    Zhonghua zhong liu za zhi [Chinese journal of oncology] 08/2014; 36(8):592-6.
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    ABSTRACT: The objective of this study was to investigate the influences of cultural diversity and group composition on computer-mediated group decision making for mixed American–Chinese groups. Seventy-five Chinese and fifty Americans participated in a laboratory experiment. Twenty-five five-person groups were formed. Each group performed four preference decision-making tasks with different levels of impact and complexity. Group-level measurements of group outcomes and individual-level measurements of group processes were collected. The results indicated that cultural diversity had both positive and negative effects on group decision making. Culturally heterogeneous groups made better decisions than did culturally homogeneous groups, but took longer to make decisions. Moreover, in terms of improvement of the quality of decisions, groups with a balanced representation from each culture outperformed unbalanced groups. Meanwhile, participants in the balanced groups had greater sensitivity to leader emergence and perceived less conflict. The results of this study also revealed the effects of self-construal and self-efficacy in communication on group performance. Implications for intercultural management were provided. © 2012 Wiley Periodicals, Inc.
    Human Factors and Ergonomics in Manufacturing 07/2014; 24(4). · 0.62 Impact Factor
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    ABSTRACT: A modified latex compounding approach was used to prepare graphene/styrene-butadiene rubber (GE/SBR) nanocomposites with multifunctional properties as well as enhanced mechanical property. It is found that the method is efficient in achieving a molecular level dispersion of GE nanosheets in the rubber matrix. Moreover, the well dispersed GE nanosheets have strong interfacial interaction with SBR. As a result, the mechanical property of SBR is greatly improved. Nearly 11 folds of increase in the tensile strength is attained upon addition of 7 phr of GE, which is comparable to the reinforcement effect of 30 phr of carbon black (N330) or 40 phr of fumed nanosilica. More intriguingly, the GE/SBR nanocomposites have low heat buildup and gas permeability, as well as high wear resistance, thermal stability and electrical conductivity. Such versatile functional properties promise GE/SBR nanocomposites for many new applications, for example, green tires and electronic skin.
    Composites Science and Technology 07/2014; · 4.48 Impact Factor
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    ABSTRACT: We present a design framework of regenerating codes for distributed storage systems which employ binary additions and bit-wise cyclic shifts as the basic operations. The proposed coding method can be regarded as a concatenation coding scheme with the outer code being a binary cyclic code, and the inner code a regenerating code utilizing the binary cyclic code as the alphabet set. The advantage of this approach is that encoding and repair of failed node can be done with low computational complexity. It is proved that the proposed coding method can achieve the fundamental tradeoff curve between the storage and repair bandwidth asymptotically when the size of the data file is large.
    2014 IEEE International Symposium on Information Theory (ISIT); 06/2014
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    ABSTRACT: 1. Pathogens can affect their hosts and change community composition and structure. Pathogens may be key determinants of biological invasions. However, few empirical studies exist examining how non-native plants drive their invasions through indirect effects involved with pathogens. Here, indirect effects refer to how one species alters the effect that another species has on a third.2. Fusarium palustre was associated with the dieback of Spartina alterniflora in its native North American salt marshes. Native plant Phragmites australis was also found to die back in the Dongtan wetland of the Chinese Yangtze River estuary invaded by non-native Spartina alterniflora. This phenomenon suggests that Spartina might not escape from its pathogen when being introduced from its native North America, and has indirectly caused the dieback of Phragmites in China.3. To investigate the indirect effect of Spartina involving Fusarium, we sampled plants and soils in dieback patches to isolate the pathogen. Next, we used an artificial inoculation study to determine the virulence of Fusarium to both Phragmites and Spartina. Finally, the spatial distribution of Fusarium was studied through examining its incidence in salt marshes along the east coast of China.4. The endophytic fungus F. palustre was found to be closely associated with Phragmites dieback in the Dongtan wetland and it is likely that it was transported by non-native Spartina from their native North American salt marshes to the Chinese salt marshes. The spillover of F. palustre from non-native Spartina to native Phragmites might subsequently facilitate Spartina invasion.5. Synthesis. Invasive plants do not only directly compete with native plants, but also indirectly cause pathogen infection on the latter, by acting as vectors and reservoirs for pathogens shared with native plants. Our findings highlight the significance of indirect effects involving pathogens in biological invasions. It is necessary to consider these pathogen-mediated indirect effects of non-native plant species in multi-host-pathogen systems for management and restoration purposes.This article is protected by copyright. All rights reserved.
    Journal of Ecology 06/2014; · 5.69 Impact Factor
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    ABSTRACT: Neuronal oscillations reflect the activity of neuronal ensembles engaged in integrative cognition, and may serve as a functional measure for the cognitive impairment in schizophrenia. This study aims to reveal the abnormal amplitude dynamics of electroencephalogram (EEG) oscillations in schizophrenia patients on multiple time scales. EEGs were recorded from schizophrenia patients ( n = 19) and healthy controls ( n = 16) while they were at resting state with eyes closed, at resting state with eyes open, and at watching video. Detrended fluctuation analysis and measures of life-time and waiting-time were used to characterize the abnormal dynamics of EEG oscillations on both long (1-20 s) and short (≤1 s) time scales. Abnormal dynamics of EEG oscillations in alpha and beta bands were observed. In particular, compared with healthy controls, schizophrenia patients have smaller DFA exponent (implying weaker long-range temporal correlation) in the left fronto-temporal area and smaller DFA exponent, smaller life-time (indicating shorter oscillation burst), and smaller waiting-time in the occipital area in beta band at resting state with eyes open. In addition, schizophrenia patients have larger DFA exponent, larger life-time, and larger waiting-time at some clustered channels in the temporo-parietal area in alpha band at watching video. The present results provide new insights for cognitive deficits and the underlying neuronal dysfunction in schizophrenia.
    IEEE transactions on bio-medical engineering 06/2014; 61(6):1756-64. · 2.15 Impact Factor
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    ABSTRACT: A new type of magnetic halloysite nanotubes molecularly imprinted polymer (MHNTs@MIP) based on halloysite nanotubes (HNTs) with embedded magnetic nanoparticles was introduced in this study. MHNTs@MIP was prepared through surface imprinting technology, using 2,4-dichlorophenoxyacetic acid (2,4-D) as a template, 4-vinylpyridine as the monomer, divinylbenzene as cross-linking agents, and 2,2-azodiisobutyronitrile as initiator. MHNTs@MIP was characterized by Fourier Transform Infrared Spectrometer, transmission electron microscopy, X-ray diffraction, and vibrating sample magnetometer. MHNTs@MIP exhibited rapid and reliable analysis with supermagnetic properties, as well as repeated use and template-specific recognition. The adsorption capacity of magnetic halloysite nanotubes non-imprinted polymer (MHNTs@NIP) and MHNTs@MIP was 10.3mg/g and 35.2mg/g, respectively. In the detailed discussion on specific selectivity, MHNTs@MIP can be applied as an adsorbent for sample pretreatment extraction and obtain high recoveries of about 85-94%. After extraction, high-performance liquid chromatography was used to detect 2,4-D residue in water.
    Journal of hazardous materials. 05/2014; 276C:58-65.

Publication Stats

3k Citations
1,082.12 Total Impact Points

Institutions

  • 2014
    • Central South University
      • Department of Chemistry Engineering
      Ch’ang-sha-shih, Hunan, China
  • 2008–2014
    • Nanjing University
      • Department of Chemical Engineering
      Nan-ching, Jiangsu Sheng, China
    • University of Nebraska at Lincoln
      • Department of Chemistry
      Lincoln, Nebraska, United States
    • South China Normal University
      Shengcheng, Guangdong, China
    • Peking Union Medical College Hospital
      Peping, Beijing, China
  • 2006–2014
    • Tsinghua University
      • • Department of Industrial Engineering
      • • Department of Architecture
      Peping, Beijing, China
    • Shanghai Jiao Tong University
      • School of Medicine
      Shanghai, Shanghai Shi, China
    • National Institute of Advanced Industrial Science and Technology
      • Computational Biology Research Center
      Tsukuba, Ibaraki, Japan
  • 2002–2014
    • Peking University
      • • Shenzhen Graduate School
      • • Health Science Center
      • • School of Basic Medical Science
      • • Department of Chemical Biology
      Peping, Beijing, China
    • Beijing Medical University
      • School of Pharmaceutical Sciences
      Peping, Beijing, China
  • 1999–2014
    • Fudan University
      • • Institute of Biodiversity Science
      • • Department of Chemistry
      Shanghai, Shanghai Shi, China
  • 2013
    • Sichuan University of Science and Engineering
      Hua-yang, Sichuan, China
    • Beijing University of Technology
      Peping, Beijing, China
  • 2009–2013
    • Northeast Institute of Geography and Agroecology
      • Institute of Physics
      Beijing, Beijing Shi, China
    • Renji Hospital
      Shanghai, Shanghai Shi, China
    • Huazhong University of Science and Technology
      • Department of Electronics and Information Engineering
      Wu-han-shih, Hubei, China
    • Michigan State University
      East Lansing, Michigan, United States
  • 2001–2013
    • Chinese Academy of Sciences
      • • Institute of Physics
      • • Institute of Health Sciences
      • • Institute of High Energy Physics
      • • Condensed Matter Physics
      Peping, Beijing, China
  • 2012
    • Shanxi Normal University
      Saratsi, Shanxi Sheng, China
    • Southwest Jiaotong University
      • School of Information Science and Technology
      Hua-yang, Sichuan, China
  • 2006–2012
    • Shanghai Normal University
      Shanghai, Shanghai Shi, China
  • 2011
    • Zhejiang Medical University
      Hang-hsien, Zhejiang Sheng, China
  • 2010–2011
    • China Pharmaceutical University
      • Division of Analytical Chemistry
      Nan-ching-hsü, Jiangxi Sheng, China
  • 2008–2009
    • National University of Singapore
      • • Department of Chemistry
      • • Department of Physics
      Singapore, Singapore
  • 2005–2009
    • Chinese Academy of Medical Sciences
      • Institute of Basic Medical Sciences (IBMS)
      Peping, Beijing, China
    • Beijing Cancer Hospital
      Peping, Beijing, China
  • 2007
    • Peking University Health Science Center
      Peping, Beijing, China
    • Dalian Ocean University
      Lü-ta-shih, Liaoning, China
    • University of Texas Southwestern Medical Center
      Dallas, Texas, United States
    • China University of Mining Technology
      Wu-hsien, Jiangsu Sheng, China
  • 2006–2007
    • Iowa State University
      • Department of Chemistry
      Ames, IA, United States
  • 2002–2006
    • University of Iowa
      • Department of Chemistry
      Iowa City, IA, United States
  • 2004–2005
    • Second Military Medical University, Shanghai
      Shanghai, Shanghai Shi, China
    • Shanghai Institutes for Biological Sciences
      Shanghai, Shanghai Shi, China
  • 1998–1999
    • Shanghai Institute of Health Sciences
      Shanghai, Shanghai Shi, China