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Chinese Chemical Letters 2002年第12期13卷 1193-1194页

作者： Xiao Qian HAN Yong Min LI Yu Hua ZHANG Sheng Xiang JIANG Li Ren CHEN Lanzhou Institute of Chemical Physics Chinese Academy of SciencesLanzhou 730000

Amylose tris (phenylcarbamate) chiral stationary phase (ATPC-CSP) was prepared and used for optical resolution of clusters 1 and 2. n-Hexane/2-propanol ( 99/1; v/v) were found to be the most suitable mobile phase on ... 详细信息

关键词： optical resolution amylose tris (phenylcarbamate) chiral stationary phase chiral tetrahedrone type cluster.

resolution and Crystal Structure of 9α-(3-Azabicyclo[3,3,1]nonanyl)- 2′-cyclopentyl-2′-hydroxyl-2′-thienylacetate

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Chinese Journal of Structural Chemistry 2006年第5期25卷 547-551页

作者： LIU He HAN Xiang-Yu ZHANG Yan-Ping ZHONG Bo-Hua LIU Ke-Liang Beijing Institute of Pharmacology and Toxicology 27 Taiping Road Beijing 100850 China

The crystal structure of 9α-（3-azabicyclo[3,3,1]nonanyl）-2′-cyclopentyl-2′-hydro- xyl-2′-thienylacetate （C16H27NO3S, Mr = 349.48） has been determined by single-crystal X-ray diffraction analysis. The crystal belongs to orthorhombic, space group P212121 with a = 14.937（3）, b = 8.1673（16）, c = 15.423（3） ,A, V = 1881.5（6） ,A^3, Z = 4, Dc =1.234 g/cm^3, μ = 0.188 mm^-1, F（000） = 752, the final R = 0.0468 and wR = 0.1251. The bicyclo[3,3,1]nonane ring system adopts the most favored twin-chair conformation. The crystal structure shows the existence of intramolecular O-H…O hydrogen bonds by which a one-dimensional chain structure is formed.

关键词： optical resolution crystal structure muscarinic receptor antagonist

Synthesis of the optically pure 5,5"-dihydroxy-7,7"-dimethoxy-8,8"-biflavone and its derivatives

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Chinese Journal of Chemistry 1997年第5期15卷 464-471页

作者： Zhang, FJ Lin, GQ Chinese Acad Sci Shanghai Inst Organ Chem Shanghai 200032 Peoples R China

(+/-)-5,5 '-Dihydroxy-7,7 '-dimethoxy-8,8 '-biflavone ((+/-)-1) was resolved into its optically pure forms via the formation and recrystallization of its (2R)- and (2S)-1-(4-toluenesulfonyl)prolylate, and the methylated derivatives of (+)- and (-)-1 were also prepared. The absolute configurations of all these 8,8 '-biflavones have been confirmed by their CD spectra.

关键词： 8,8 ''-biflavones synthesis optical resolution absolute configuration CD spectra

resolution enhancement with deblurring by pixel reassignment

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Advanced Photonics 2023年第6期5卷 59-71页

作者： Bingying Zhao Jerome Mertz Boston University Department of Electrical and Computer EngineeringBostonMassachusettsUnited States Boston University Department of Biomedical EngineeringBostonMassachusettsUnited States

Improving the spatial resolution of a fluorescence microscope has been an ongoing challenge in the imaging *** address this challenge,a variety of approaches have been taken,ranging from instrumentation development to image *** example of the latter is deconvolution,where images are numerically deblurred based on a knowledge of the microscope point spread ***,deconvolution can easily lead to noise-amplification *** by postprocessing can also lead to negativities or fail to conserve local linearity between sample and *** describe here a simple image deblurring algorithm based on pixel reassignment that inherently avoids such artifacts and can be applied to general microscope modalities and fluorophore *** algorithm helps distinguish nearby fluorophores,even when these are separated by distances smaller than the conventional resolution limit,helping facilitate,for example,the application of single-molecule localization microscopy in dense *** demonstrate the versatility and performance of our algorithm under a variety of imaging conditions.

关键词： image deblurring microscopy bio-imaging image reconstruction optical resolution

Non-interferometric photoacoustic remote sensing microscopy

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Light(Science & Applications) 2017年第1期6卷 753-760页

作者： Parsin Hajireza Wei Shi Kevan Bell Robert J Paproski Roger J Zemp Department of Electrical and Computer Engineering University of AlbertaEdmontonAlbertaT6G 2V4 Canada IllumiSonics Inc.5205-38A Ave.N.W.EdmontonAlbertaT6L 2J4Canada

Elasto-optical refractive index modulation due to photoacoustic initial pressure transients produced significant reflection of a probe beam when the absorbing interface had an appreciable refractive index *** effect was harnessed in a new form of non-contact optical resolution photoacoustic microscopy called photoacoustic remote sensing microscopy.A noninterferometric system architecture with a low-coherence probe beam precludes detection of surface oscillations and other phase-modulation *** probe beam was confocal with a scanned excitation beam to ensure detection of initial pressure-induced intensity reflections at the subsurface origin where pressures are *** studies confirmed signal dependence on optical absorption,index contrast and excitation *** vivo imaging of superficial microvasculature and melanoma tumors was demonstrated with~2.7±0.5μm lateral resolution.

关键词： all optical medical imaging optical resolution photoacoustic remote sensing

Multi-mode Scanning Near-field optical Microscope

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Semiconductor Photonics and Technology 2002年第2期8卷 116-120页

作者： WANG Jia, LIU Xiu-mei (State Key Lab. of Precision Measurement Technology and Instruments, Dept. of Precision Instruments, Tsinghua University, Beijing 100084, CHN) Dept. of Precision Instruments Tsinghua University State Key Lab. of Procision Measurement Technology and Instruments 北京 100084

A scanning near-field optical microscope using uncoated fiber tipis described, which can work in transmission and reflectionconfigurations, both capable of working in illumination andcollection-mode, so that either transparent of opaque sample can beinvestigated. Depending on different applications, eitherconstant-gap or constant-height images can be achieved. A compacthomemade translator permits to elect interested area of sample in therange of 4 mm×4 mm.

关键词： Near-field optical scanning microscope optical resolution