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Investigation of protein-styrene oxide adducts as a molecular biomarker of human exposed to styrene

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Journal of Environmental Sciences 2001年第4期13卷 391-397页

作者： liu, S.-F. Fang, Q.-M. Jin, z.-L. Rappaport, M.S. Res. Cntr. Eco-Environmental Sci. Chinese Academy of Sciences Beijing 100085 China

Hemoglobin-styrene oxide adducts in blood have been studied as a molecular biomarker of worker exposed to styrene. Determination of protein-styrene oxide adducts in different biological samples with modified Raney-Ni procedure is described in this paper. The following biological samples have been investigated: fresh rat blood reacted with styrene oxide in vitro: rat blood reacted with styrene or styrene oxide in vivo: vein blood from workers exposed to styrene in two factories. The data showed that there was a good linear dose-response relationship between reacting dose of styrene oxide or styrene and amount of protein-styrene oxide adducts in both in vitro and in vivo experiments. For human samples, a dose-response relationship between protein adducts and styrene exposure can be found in glass fiber factory, but not in piano manufacture plant.

关键词： Blood Drug dosage Glass fibers Hemoglobin Manufacture Oxides Proteins Styrene

Transfer kinetics of phenol between aqueous phase and N,N-di(1-methyl-heptyl) acetamide in kerosene

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Journal of Environmental Sciences 2000年第2期12卷 19-23页

作者： z.u-xian, Y. Hui-fang, D. Qi-hong, z. z.-ming, z. Dept. of Environmental Sci./Eng. Fudan University Shanghai 200433 China

The transfer kinetics of phenol between aqueous phase and N,N di(methyl heptyl) acetaminde (N503) in kerosene has been studied using Lewis cell technique. The effects of the factors including the concentrations of phenol in aqueous phase and organic phase, the concentration of N503 in organic phase, the acidity of aqueous phase, the stirring speed and the temperature on the rates of forward and backward extraction of phenol have been examined. The regularity of extraction rate has been obtained. According to experimental results, the rates of both forward and backward extraction of phenol might be controlled by diffusion process. The diffusion step of phenol from aqueous phase to interface for forward extraction and from interface to aqueous phase for backward extraction might be the rate controlling steps.

关键词： phenol transfer kinetics N,N di(1 methyl heptyl) acetamide CLC number: X703 Document code: A Introduction

Current status and future directions of high-throughput ADME screening in drug discovery

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Journal of Pharmaceutical Analysis 2020年第3期10卷 201-208页

作者： Wilson z.Shou Bristol-Myers Squibb PO Box 4000PrincetonNJ08540USA

During the last decade high-throughput in vitro absorption,distribution,metabolism and excretion(HTADME)screening has become an essential part of any drug discovery effort of synthetic *** conduct of HT-ADME screening has been"industrializ.d"due to the extensive development of software and automation tools in cell culture,assay incubation,sample analysis and data *** HT-ADME assay portfolio continues to expand in emerging areas such as drug-transporter interactions,early soft spot identification,and ADME screening of peptide drug ***,thanks to the very large and high-quality HT-ADME data sets available in many biopharma companies,in silico prediction of ADME properties using machine learning has also gained much momentum in recent *** this review,we discuss the current state-of-the-art practices in HT-ADME screening including assay portfolio,assay automation,sample analysis,data processing,and prediction model *** addition,we also offer perspectives in future development of this exciting field.

关键词： In vitro HT-ADME Automation Bioanalysis Mass spectrometry Acoustic ejection mass spectrometry

Electrochemical manufacturing of nanocarbons from carbon dioxide in molten alkali metal carbonate salts： roles of alkali metal cations

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Advances in Manufacturing 2016年第1期4卷 23-32页

作者： Happiness V. Ijije George z. Chen Department of Chemical and Environmental Engineering Faculty of Engineering University of NottinghamNottingham NG7 2RD UK Department of Chemical and Environmental Engineering and Centre for Sustainable Energy Technologies Faculty ofScience and Engineering University of Nottingham NingboChina Ningbo 315100 People's Republic of China

One simple and fast way to manufacture a useful product from CO2 is to capture the gas by, and then carry out electrolysis in molten alkali metal carbonates. Carbon electro-deposition in molten Li2CO3-Na2CO3- KaCO3 （molar ratio： 43.5：31.5：25.0） has been widely reported in literature. However, studies in each of the individual alkali metal carbonates either have received less attention or are simply lacking in literature. Electrochem- ical studies of these molten carbonates are important to understand their underlying processes and reactions during the electrolysis. In this work, cyclic voltammograms （CVs） were recorded in each of the above-mentioned molten alkali carbonate salts using a 0.25 mm diameter Pt wire working electrode. In molten Na2CO3 and K2CO3, the main cathodic reaction was likely the formation of alkali metal, while that in Li2CO3 was carbon deposition. The results also suggest that other competing reactions such as CO and alkali metal carbide formation are possible as well in dif- ferent molten salts. On the CVs, the anodic current peaks observed are mostly associated with the oxidation of cathodic products. Flake/ring/sheet-like structures and quasi-spherical particles were observed in the produced carbon. The morphology of the carbon contained both amorphous and graphitic structures, which varied with different electrolysis variables.

关键词： Carbon capture and utilisation Electro-deposition Cyclic voltammetry Nanocarbons Moltensalts Alkali metal carbonates

Designing Electronic Structures of Multiscale Helical Converters for Tailored Ultrabroad Electromagnetic Absorption

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Nano-Micro Letters 2025年第1期17卷 439-455页

作者： z.aobo Feng Chongbo liu Xin Li Guangsheng Luo Naixin z.ai Ruiz.e Hu Jing Lin Jinbin Peng Yuhui Peng Renchao Che Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle School of Environmental and Chemical EngineeringNanchang Hangkong UniversityNanchang 330063People’s Republic of China School of Physics and Materials Nanchang UniversityNanchang 330031People’s Republic of China Key Laboratory of Nondestructive Testing Ministry of EducationNanchang Hangkong UniversityNanchang 330063People’s Republic of China Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative MaterialsAcademy for Engineering and TechnologyFudan UniversityShanghai 200438People’s Republic of China

Atomic-scale doping strategies and structure design play pivotal roles in tailoring the electronic structure and physicochemical property of electromagnetic wave absorption(EMWA)***,the relationship between configuration and electromagnetic(EM)loss mechanism has remained ***,drawing inspiration from the DNA transcription process,we report the successful synthesis of novel in situ Mn/N co-doped helical carbon nanotubes with ultrabroad EMWA *** calculation and EM simulation confirm that the orbital coupling and spin polariz.tion of the Mn–N4–C configuration,along with cross polariz.tion generated by the helical structure,endow the helical converters with enhanced EM *** a result,HMC-8 demonstrates outstanding EMWA performance,achieving a minimum reflection loss of−63.13 dB at an ultralow thickness of 1.29 *** precise tuning of the graphite domain siz.,HMC-7 achieves an effective absorption bandwidth(EAB)of 6.08 GHz.at 2.02 mm ***,constructing macroscale gradient metamaterials enables an ultrabroadband EAB of 12.16 GHz.at a thickness of only 5.00 mm,with the maximum radar cross section reduction value reaching 36.4 dB *** innovative approach not only advances the understanding of metal–nonmetal co-doping but also realiz.s broadband EMWA,thus contributing to the development of EMWA mechanisms and applications.

关键词： Metal-nonmetal co-doping 3d-2p orbital coupling Spin polariz.tion Helical structure Broadband EM wave absorption

Wavelet-Based Mixed-Resolution Coding Approach Incorporating with SPT for the Stereo Image

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Journal of Systems Engineering and Electronics 2001年第3期12卷 39-44页

作者： Xu, C. z.ang, z. An, P. Communication School Shanghai University Shanghai 200072 China

With the advances of display technology, three-dimensional(3-D) imaging systems are becoming increasingly popular. One way of stimulating 3-D perception is to use stereo pairs, a pair of images of the same scene acquired from different perspectives. Since there is an inherent redundancy between the images of a stereo pairs, data compression algorithms should be employed to represent stereo pairs efficiently. The proposed techniques generally use block-based disparity compensation. In order to get the higher compression ratio, this paper employs the wavelet-based mixed-resolution coding technique to incorporate with SPT-based disparity-compensation to compress the stereo image data. The mixed-resolution coding is a perceptually justified technique that is achieved by presenting one eye with a low-resolution image and the other with a high-resolution image. Psychophysical experiments show that the stereo image pairs with one high-resolution image and one low-resolution image provide almost the same stereo depth to that of a stereo image with two high-resolution images. By combining the mixed-resolution coding and SPT-based disparity-compensation techniques, one reference (left) high-resolution image can be compressed by a hierarchical wavelet transform followed by vector quantiz.tion and Huffman encoder. After two level wavelet decompositions, for the low-resolution right image and low-resolution left image, subspace projection technique using the fixed block siz. disparity compensation estimation is used. At the decoder, the low-resolution right subimage is estimated using the disparity from the low-resolution left subimage. A full-siz. reconstruction is obtained by upsampling a factor of 4 and reconstructing with the synthesis low pass filter. Finally, experimental results are presented, which show that our scheme achieves a PSNR gain (about 0.92dB) as compared to the current block-based disparity compensation coding techniques.

关键词： Data reduction Decoding Image coding Image compression Image reconstruction Imaging techniques Motion compensation Motion estimation Optical resolving power Projection systems Stereo vision Wavelet transforms

Modelling of a Multi-Temperature Plasma Composition

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Chinese Physics Letters 2005年第12期22卷 3119-3122页

作者： B. Liani R. Benallal z. Bentalha Laboratoire Physique Théorique B.P. 119 Bel Horizon 13000 Tlemcen Algérie

Knowledge of plasma composition is very important for various plasma applications and prediction of plasma properties. We use the Saha equation and Debye length equation to calculate the non-local thermodynamic-equilibrium plasma composition. It has been shown that the model to 2T with T representing the temperature （electron temperature and heavy-particle temperature） described by Chen and Han [J. Phys. D 32 （1999）1711] can be applied for a mixture of gases, where each atomic species has its own temperature, but the model to 4T is more general because it can be applicable to temperatures distant enough of the heavy particles. This can occur in a plasma composed of big- or macro-molecules. The electron temperature Te varies in the range 8000＊20000K at atmospheric pressure.

关键词： 2-TEMPERATURE PLASMA SCATTERING

A HOMOTOPY METHOD OF SWITCHING SOLUTION BRANCHES AT THE PITCHFORK BIFURCATION POINT

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Journal of Computational Mathematics 2001年第3期19卷 299-308页

作者： Cong, Y.-H. z.u, z.-Y. College of Mathematical Sciences Shanghai Teachers University Shanghai 200234 China

Provides information on a study which proposed a continuation method for switching solution branches at a pitchfork point. Problem of the standard pitchfork; Information on the systems of equations; Numerical examples... 详细信息

关键词： homotopy method switching solution branches pitchfork point

A method for analyz.ng on-line video images of crystalliz.tion at high-solid concentrations

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Particuology 2008年第1期6卷 9-15页

作者： Jian Wan Cai Y. Ma Xue z. Wang Institute of Particle Science and Engineering School of Process Environmental and Materials Engineering University of Leeds Leeds LS2 9JT UK

Recent research has demonstrated that on-line video imaging is a very promising technique for monitoring crystalliz.tion processes. The bottleneck in applying the technique for real-time closed-loop control is considered as image analysis that needs to be robust, fast and able to handle varied image qualities due to temporal variations of operating conditions such as mixing and solid concentrations. Image analysis at highsolid concentrations turns out to be extremely challenging because crystals tend to overlap or attach to each other and the boundaries between the crystals are usually ambiguous. This paper presents an image segmentation algorithm that can effectively deal with images taken at high-solid concentrations. The method segments crystals attached to each other along the mostly related concave points on the contours of crystal blocks. The detailed procedure is introduced with application to crystalliz.tion of L-glutamic acid in a hot-stage reactor.

关键词： Crystalliz.tion High-solid concentrations Image processing Multi-scale segmentation Watershed segmentation Crystal siz. distribution