Research Topics
| Xu LiSummaryAffiliation: Northwestern University Country: USA Publications
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Detail Information
Publications
Analytical techniques for addressing forward and inverse problems of light scattering by irregularly shaped particlesXu Li
Department of Biomedical Engineering, Northwestern University, Evanston, Illinois 60208, USA
Opt Lett 29:1239-41. 2004..We also demonstrate that these approaches have the potential to address the inverse-scattering problem by means of a spectral analysis of the total scattering cross section of arbitrarily shaped particles...- Modeling low-coherence enhanced backscattering using Monte Carlo simulationHariharan Subramanian
Department of Biomedical Engineering, Northwestern University, Evanston, Illinois 60208, USA
Appl Opt 45:6292-300. 2006..We show that small exit angles are highly sensitive to low-order scattering, which is crucial for accurate modeling of LEBS. Our results show that the predictions of the model are in excellent agreement with the experimental data... - Superenhanced backscattering of light by nanoparticlesZhigang Chen
Department of Electrical and Computer Engineering, Northwestern University, Evanston, Illinois 60208, USA
Opt Lett 31:196-8. 2006..Potential applications of this phenomenon include visible-light detection, characterization, and manipulation of particles as small as a few nanometers... - Backscattering enhancement of light by nanoparticles positioned in localized optical intensity peaksZhigang Chen
Department of Electrical and Computer Engineering, Northwestern University, Evanston, Illinois 60208, USA
Appl Opt 45:633-8. 2006..Potential applications include visible-light detection, characterization, and manipulation of nanoparticles... 
B-scan based acoustic source reconstruction for magnetoacoustic tomography with magnetic induction (MAT-MI)Leo Mariappan
Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455, USA
IEEE Trans Biomed Eng 58:713-20. 2011..We have also conducted phantom experiments to evaluate the proposed method, and the reconstructed image shows a good agreement with the target phantom...- Comparison study of three different image reconstruction algorithms for MAT-MIRongmin Xia
Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455, USA
IEEE Trans Biomed Eng 57:708-13. 2010..The computer simulation results indicate that the potential energy method and vectored pressure method can directly reconstruct the Lorentz force distribution and give a more accurate reconstruction of electrical conductivity... - Anomalous oscillations in the spectra of light backscattered by inhomogeneous microparticlesXu Li
Department of Biomedical Engineering, Northwestern University, Evanston, Illinois 60208, USA
Phys Rev E Stat Nonlin Soft Matter Phys 75:037601. 2007..We explain this anomalous behavior by examining the path-length distributions of the backscattered photons in the cross polarization... - Multi-excitation magnetoacoustic tomography with magnetic induction for bioimpedance imagingXu Li
Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455, USA
IEEE Trans Med Imaging 29:1759-67. 2010..Benefits that come with this new method include better differentiation of tissue types with conductivity contrast using the MAT-MI approach, specifically for potential breast cancer screening application in the future... - Characterization of malignant brain tumor using elastic light scattering spectroscopyJianmin Gong
Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
Dis Markers 25:303-12. 2008..We also demonstrate that all three classification methods discriminate between tumor and normal tissue and have the potential to identify and quantitatively characterize tumor-infiltrated brain tissues... - Optical methodology for detecting histologically unapparent nanoscale consequences of genetic alterations in biological cellsHariharan Subramanian
Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
Proc Natl Acad Sci U S A 105:20118-23. 2008..These data indicate that this advance in single-cell optics represented by PWS may have significant biomedical applications... - Analyzing absorption and scattering spectra of micro-scale structures with spectroscopic optical coherence tomographyJi Yi
Biomedical Engineering Department, Northwestern University, 2145 Sheridan Rd, Evanston IL, 60208 USA
Opt Express 17:13157-67. 2009..Two different types of microspheres in gel phantom are discriminated based on their distinguished absorbent feature... 
Estimation of oxygen saturation from erythrocytes by high-resolution spectroscopic optical coherence tomographyJi Yi
Biomedical Engineering Department, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA
Opt Lett 35:2094-6. 2010..The result shows a reliable linear association between the SaO(2) derived from SOCT and the DS measurement, indicating this methodology has potential on in vivo applications to evaluate blood oxygenation...- Imaging electrical impedance from acoustic measurements by means of magnetoacoustic tomography with magnetic induction (MAT-MI)Xu Li
Department of Biomedical Engineering, University of Minnesota, Minneapolis 55455, USA
IEEE Trans Biomed Eng 54:323-30. 2007..The feasibility of MAT-MI in providing high spatial resolution images containing impedance-related information has also been demonstrated in a phantom experiment... - 3D current source density imaging based on the acoustoelectric effect: a simulation study using unipolar pulsesRenhuan Yang
Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455, USA
Phys Med Biol 56:3825-42. 2011..We have shown in computer simulation that using the present method it is feasible to image with high spatial resolution an arbitrary 3D current density distribution in an inhomogeneous conductive media... - Three-dimensional multiexcitation magnetoacoustic tomography with magnetic inductionXu Li
Department of Biomedical Engineering, University of Minnesota, Minnesota 55455, USA
J Appl Phys 108:124702. 2010.... - Elastic backscattering spectroscopic microscopyYang Liu
Department of Biomedical Engineering, Northwestern University, Evanston, Illinois 60208, USA
Opt Lett 30:2445-7. 2005..We also demonstrate that the spectroscopic data can provide nanoscale structural information beyond what conventional microscopy reveals... - Confocal microwave imaging for breast cancer detection: localization of tumors in three dimensionsElise C Fear
University of Calgary, Electrical and Computer Engineering, Canada
IEEE Trans Biomed Eng 49:812-22. 2002..The influences of the synthetic array size and position relative to the tumor are also explored... - Core-corona structure of cubic silsesquioxane-poly(ethylene oxide) in aqueous solution: fluorescence, light scattering, and TEM studiesK Yi Mya
Institute of Materials Research and Engineering, 3 Research Link, Singapore 117602, Republic of Singapore
J Phys Chem B 109:9455-62. 2005..The long PEO segments act as a spacer between the spherical aggregates, which facilitate the formation of a network-like structure at high concentration... - Supramolecular assembled nanostructure containing cubic silsesquioxane in aqueous solutionKhine Yi Mya
Institute of Materials Research and Engineering, 3 Research Link, Singapore 117602
J Nanosci Nanotechnol 6:3955-9. 2006..The size of the drug loaded CSSQ-PEO nanospheres are found to be larger (250-300 nm) than that of the core-corona CSSQ-PEO micellar aggregates (approximatly 180 nm) in dilute aqueous solution... - Determination and load of organophosphorus and organochlorine pesticides at water from Jiulong River Estuary, ChinaZhang Zulin
Key Laboratory of Marine Environmental Science of Ministry of Education, Environmental Science Research Center, Xiamen University, China
Mar Pollut Bull 45:397-402. 2002..When compared with other areas, the OPs and OCs level in JLRE are some moderate... - Analysis of bacterial adhesion using a gradient force analysis method and colloid probe atomic force microscopyXu Li
Department of Civil and Environmental Engineering, Pennsylvania State University, University Park 16802, USA
Langmuir 20:8817-22. 2004..These results show that gradient analysis is useful for studying the contribution of the length of the exopolymers on the cell surface to bacterial adhesion to glass surfaces... - Characterization of the heptad repeat regions, HR1 and HR2, and design of a fusion core structure model of the spike protein from severe acute respiratory syndrome (SARS) coronavirusYanhui Xu
Laboratory of Structural Biology, Tsinghua University, Beijing 100084, China
Biochemistry 43:14064-71. 2004..We also propose an important target site for fusion inhibitor design and several strategies, which have been successfully used in fusion inhibitor design for human immunodeficiency virus (HIV), for the treatment of SARS infection... - cDNA cloning, functional expression and antifungal activities of a dimeric plant defensin SPE10 from Pachyrrhizus erosus seedsXiaomin Song
National Laboratory of Biomacromolecules, Institute of Biophysics, University of Science and Technology of China, Key Laboratory of Structural Biology, Chinese Academy of Sciences, P R China
Plant Mol Biol 57:13-20. 2005..Several evidence suggested SPE10 should be the first dimeric plant defensin reported so far... - Micellization phenomena of biodegradable amphiphilic triblock copolymers consisting of poly(beta-hydroxyalkanoic acid) and poly(ethylene oxide)Jun Li
Institute of Materials Research and Engineering, National University of Singapore, 3 Research Link, Singapore 117602, Singapore
Langmuir 21:8681-5. 2005.... - Poly(ester urethane)s consisting of poly[(R)-3-hydroxybutyrate] and poly(ethylene glycol) as candidate biomaterials: characterization and mechanical property studyXu Li
Institute of Materials Research and Engineering (IMRE, National University of Singapore, 3 Research Link, Singapore 117602
Biomacromolecules 6:2740-7. 2005..Young's modulus and the stress at break increased with increasing PHB segment length or PEG segment length, whereas the strain at break increased with increasing PEG segment length or decreasing PHB segment length... - Early subfoveal choroidal neovascularization secondary to an accidental stage laser injuryZuhua Sun
Key Laboratory of Ophthalmology of Ministry of Education, and Zhongshan Ophthalmic Center, Sun Yat-sen University, 54 Xianlie Road, Guangzhou, 510060, People's Republic of China
Graefes Arch Clin Exp Ophthalmol 244:888-90. 2006..01. Funduscopic examination revealed the lesion unchanged and the hemorrhage diminished. CONCLUSIONS: Stage laser light with a wavelength of 532 nm may cause early subfoveal choroidal neovascularization when used inappropriately... - Synthesis of large-pore methylene-bridged periodic mesoporous organosilicas and its implicationsXiao Ying Bao
Department of Chemical and Biomolecular Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119620
J Phys Chem B 110:2656-61. 2006.... - Comparative proteomics analysis of light responses in cryptochrome1-304 and Columbia wild-type 4 of Arabidopsis thalianaYuejun Yang
College of Life Science and Biotechnology, Hunan University, Changsha 410082, China
Acta Biochim Biophys Sin (Shanghai) 40:27-37. 2008..This assessment was consistent with the known physiological responses of plants to light... - Light scattering and luminescence studies on self-aggregation behavior of amphiphilic copolymer micellesJun Hong Yao
Institute of Materials Research and Engineering, 3 Research Link, Singapore 117602, Singapore
J Phys Chem B 112:749-55. 2008..The excimer emission was further investigated by time-resolved fluorescence spectroscopy... - Use of a fluorescence lifetime imaging microscope in an apoptosis assay of Ewing's sarcoma cells with a vital fluorescent probeXu Li
Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, Nishi ku, Fukuoka 819 0395, Japan
Anal Biochem 367:219-24. 2007..In this study, the FLIM system was employed to investigate early-stage apoptosis that involves only small morphological changes, suggesting the potential advantage of this method for evaluating small biological effects in living cells... - Dynamic and static light scattering studies on self-aggregation behavior of biodegradable amphiphilic poly(ethylene oxide)-poly[(R)-3-hydroxybutyrate]-poly(ethylene oxide) triblock copolymers in aqueous solutionXu Li
Institute of Materials Research and Engineering, National University of Singapore, 3 Research Link, Singapore 117602, Republic of Singapore
J Phys Chem B 110:5920-6. 2006..The morphology of PEO-PHB-PEO spherical micelles determined by DLS and SLS measurements was further confirmed by TEM... - Crystal structures of E. coli laccase CueO at different copper concentrationsXu Li
Hefei National Laboratory for Physical Sciences at Microscale and School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230027, People s Republic of China
Biochem Biophys Res Commun 354:21-6. 2007..In addition, an extra alpha-helix from Leu351 to Gly378 covers substrate biding pocket of CueO and might compromises the electron transfer from substrate to type I copper...