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Crystal Engineering of Multiple-component Organic Compound： Organic co-Crystals of the Functional Groups of Carboxyl and Amino with Persistent Hydrogen Bonding Motifs

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Chemical Research in Chinese Universities 2013年第3期29卷 408-413页

作者： SONG Ge bai Feng-ying XING Na CHEN Chen SHAN hui XING yong-heng College of Chemistry and Chemical Engineering College of Life Science Liaoning Normal University Dalian 116029 P. R. China

Three small organic molecular co-crystal compounds （C3N6H6）·（C6H10O4）·H2O（I）, C3HsN2O（3） and （H4btec）2.（4,4＇-bipy）（4）（H4btec=1,2,4,5-benzenetetracarboxylic acid, 4,4＇-bipy=4,4＇-bipyridine） and one coordination supramolecular compound [Mn（CEO4）（HEO）E]＇C6HllNO2（2） were synthesized by hydrothermal reaction. They were characterized by elemental analysis, infrared（IR） spectroscopy and single crystal X-ray diffraction（XRD）. Structural analyses reveal that these 2D or 3D supramolecular networks of the compounds were formed by C--H…O, N--H…O, N--H…N, O--H…O and O-H…N hydrogen bonds. Therein, the functional groups of--COOH, --NH2 and --OH play important roles in constructing supramolecular architectures.

关键词： co-Crystal compound Hydrogen bond Hydrothermal reaction

Contribution of Mass Elevation Effect to the Altitudinal Distribution of Global Treelines

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Journal of Mountain Science 2015年第2期12卷 289-297页

作者： ZHAO Fang ZHANG bai-ping ZHANG Shuo QI Wen-wen HE Wen-hui WANG Jing YAO yong-hui State Key Laboratory of Resource and Environment Information System Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences University of Chinese Academy of Sciences Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application

Alpine treeline, as a prominent ecological boundary between forested mountain slopes and alpine meadow/shrub, is highly complex in altitudinal distribution and sensitive to warming climate. Great efforts have been made to explore their distribution patterns and ecological mechanisms that determine these patterns for more than 100 years, and quite a number of geographical and ecophysiological models have been developed to correlate treeline altitude with latitude or a latitude related temperature. However,on a global scale, all of these models have great difficulties to accurately predict treeline elevation due to the extreme diversity of treeline site *** of the major reasons is that "mass elevation effect"(MEE) has not been quantified globally and related with global treeline elevations although it has been observed and its effect on treeline elevations in the Eurasian continent and Northern Hemisphere recognized. In this study, we collected and compiled a total of 594 treeline sites all over the world from literatures, and explored how MEE affects globaltreeline elevation by developing a ternary linear regression model with intra-mountain base elevation(IMBE, as a proxy of MEE), latitude and continentality as independent variables. The results indicated that IMBE, latitude and continentality together could explain 92% of global treeline elevation variability, and that IMBE contributes the most(52.2%), latitude the second(40%) and continentality the least(7.8%) to the altitudinal distribution of global treelines. In the Northern Hemisphere, the three factors' contributions amount to 50.4%, 45.9% and 3.7% respectively; in the south hemisphere, their contributions are 38.3%, 53%, and 8.7%, respectively. This indicates that MEE, virtually the heating effect of macro-landforms, is actually the most significant factor for the altitudinal distribution of treelines across the globe, and that latitude is relatively more significant for treeline elevation in the

关键词： Alpine treeline Intra-mountain base elevation Multiple regression analysis Geographicalfactor Continentality Contribution rate

Simulation method for measurement of the cross-section of the^(14)N(n,a)^(11)B reaction using a gridded ionization chamber

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Nuclear Science and Techniques 2021年第8期32卷 1-11页

作者： Yi-Wei Hu Hao-Yu Jiang Zeng-Qi Cui Jie Liu Hao-Fan bai Huai-yong bai Jin-Xiang Chen Guo-hui Zhang State Key Laboratory of Nuclear Physics and Technology Institute of Heavy lon PhysicsSchool of Physics.PekingUniversityBeijing 100871China Institute of Materials China Academy of EngineeringPhysicsJiangyou 621907China

A simulation method for measurement of the cross-section of the^(14)N(n,a)^(11)B reaction with gas and solid samples using a gridded ionization chamber(GIC)has been *** the simulation,the experimental spectra of both^(14)N(n,a)^(11)B events and background from other reactions can be predicted,and the experimental scheme can be *** to the simulation results,the optimal experimental parameters,including the pressure of the working gas and the compositions of the working gas and the sample,can be *** addition,the simulation results can be used to determine the valid event area and calculate the detection efficiency for valid events.A measurement of the cross-sections of the^(14)N(n,a)^(11)B reaction at E_(n)=4.25,4.50,4.75,5.00,5.25,and 5.50 MeV,based on the 4.5-MV Van de Graff accelerator at Peking University(PKU)using a GIC as the detector for the outgoing a particles,has been *** good agreement of the spectra from the simulation and experiment demonstrated the universality of this simulation method,which can be used to accurately measure neutroninduced light-charged particle emission reactions.

关键词： Gridded ionization chamber Monte Carlo simulation Cathode–anode two-dimensional spectrum ^(14)N(n,a)^(11)B reaction

PICARD ITERATION FOR NONSMOOTH EQUATIONS

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Journal of Computational Mathematics 2001年第6期19卷 583-590页

作者： Song-bai Sheng hui-fu Xu College of Science Nanjing University of Aeronautics and AstronauticsNanjing 210016China Australian Graduate School of Management the University of New South WalesSydneyAustralia

Presents an analysis of the generalized Newton method, approximate Newton methods, and splitting methods for solving nonsmooth equations from Picard iteration viewpoint. Details of the radius of the weak Jacobian of P... 详细信息

关键词： nonsmooth equations picard iteration weak Jacobian convergence

Widespread lymph node recurrence of major duodenal papilla cancer following pancreaticoduodenectomy

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World Journal of Gastroenterology 2015年第48期21卷 13593-13598页

作者： bai-Sen Li hui Shi Min Wen Ming-yong Xiao Jian Wang Department of Radiation Oncology Sichuan Cancer Hospital and Institute Department of Thoracic Surgery Sichuan Cancer Hospital and Institute Department of Breast Surgery Sichuan Cancer Hospital and Institute

Major duodenal papilla cancer(MDPC) represents the primary type of duodenal cancer, and is typically considered a periampullary carcinoma as most tumors arise in this region. This report describes an extremely rare case involving a patient with rapidly and extensively recurrent MDPC following pancreaticoduodenectomy, who achieved complete response by concurrent image-guided radiation and intravenous oxaliplatin plus oral capecitabine therapies. The patient was a 50-year-old female who was admitted to our hospital 6 wk after resection for MDPC for evaluation of a nontender and enlarged node in the left side of her neck. After clinical work-up, the patient was diagnosed with postoperatively recurrent MDPC with widespread lymph node metastases at the bilateral cervix, mediastinum, abdominal cavity, and retroperitoneal area. She was administered whole field image-guided radiation therapy along with four cycles of the intravenous oxaliplatin plus oral capecitabine regimen. A complete response by positron emission tomography with 18-fluorodeoxyglucose was observed 4 months after treatment. The patient continues to be disease-free 2 years after the diagnosis of recurrence.

关键词： Chemoradiotherapy Complete response Neoplasm recurrence Periampullary cancer Pancreatico duodenectomy

Engineering N3C vacancies in hierarchical porous carbon nitride nanosheets for room temperature ultradeep photocatalytic aerobic oxidative desulfurization

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Science China Chemistry 2025年

作者： Yina Nie Weijie Yang Xin Wang Xiang Li Lele Wei Xiaolin bai Lin Liu Feng Fu Jun Wan College of Chemistry & Chemical Engineering Research Institute of Comprehensive Energy Industrial Technology Shaanxi Key Laboratory of Chemical Reaction Engineering Yan'an University Anhui Engineering Research Center of Carbon Neutrality College of Chemistry and Materials Science Anhui Normal University

The production of ultra-low sulfur clean fuels holds global significance for improving energy efficiency and reducing environmental pollution. Photocatalytic aerobic oxidative desulfurization（PODS） offers an attractive approach to efficiently remove refractory heterocyclic aromatic sulfur compounds under mild conditions. However, the sluggish charge dynamics,insufficient molecule activation, and slow mass transfer within photocatalysts restrict the overall desulfurization efficiency,hindering the widespread application of this technology. Herein, we developed a defective g-C3N4（M1U3CN） photocatalyst with bridged N3Cvacancies and hierarchical porous structures to address these limitations. This catalyst not only demonstrates outstanding dibenzothiophene（DBT） removal efficiency of 99.6% for model oil with high conversion and selectivity but also achieves complete sulfur removal from gasoline as well as 96.7% sulfur removal for distilled diesel at room temperature,successfully achieving ultradeep aerobic oxidative desulfurization. The introduction of rich N3Cvacancies and abundant micromeso-macroporous distribution in M1U3CN enhances kinetic efficiencies by promoting charge carrier separation, mass transfer,and molecular activation simultaneously; resulting in exceptional PODS performance. This work provides a collaborative strategy to overcome kinetic challenges in aerobic oxidative desulfurization via defect and structural engineering of the catalyst.

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Synthesis and application of bilayer-surfactant-enveloped Fe_3O_4 nanoparticles: water-based bilayer-surfactant-enveloped ferrofluids

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International Journal of Minerals,Metallurgy and Materials 2016年第2期23卷 234-240页

作者： bai-yi Chen Jian-hui Qiu hui-xia Feng Department of Machine Intelligence and Systems Engineering Faculty of Systems Engineering Akita Prefectural University College of Petrochemical Technology Lanzhou University of Technology

Superparamagnetic carbon-coated Fe3O4 nanoparticles with high magnetization（85 emu·g-（-1）） and high crystallinity were synthesized using polyethylene glycol-4000（PEG（4000）） as a carbon ***3O4 water-based bilayer-surfactant-enveloped ferrofluids were subsequently prepared using sodium oleate and PEG（4000） as *** using X-ray photoelectron spectroscopy,X-ray diffraction,and Fourier-transform infrared spectroscopy indicate that the Fe3O4 nanoparticles with a bilayer surfactant coating retain the inverse spinel-type structure and are successfully coated with sodium oleate and PEG（4000）.Transmission electron microscopy,vibrating sample magnetometry,and particle-size analysis results indicate that the coated Fe3O4 nanoparticles also retain the good saturation magnetization of Fe3O4（79.6 emu·g^-1） and that the particle size of the bilayer-surfactant-enveloped Fe3O4 nanoparticles is 42.97 nm,which is substantially smaller than that of the unmodified Fe3O4 nanoparticles（486.2 nm）.UV-vis and zeta-potential analyses reveal that the ferrofluids does not agglomerate for 120 h at a concentration of 4 g·L^-1,which indicates that the ferrofluids are highly stable.

关键词： magnetic fluids iron oxides nanoparticles bilayers sodium oleate polyethylene glycol

MODIFIED BERNOULLI ITERATION METHODS FOR QUADRATIC MATRIX EQUATION

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Journal of Computational Mathematics 2007年第5期25卷 498-511页

作者： Zhong-Zhi bai yong-Hua Gao LSEC ICMSEC Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing 100080 China

We construct a modified Bernoulli iteration method for solving the quadratic matrix equation AX^2 ＋ BX ＋ C = 0, where A, B and C are square matrices. This method is motivated from the Gauss-Seidel iteration for solving linear systems and the ShermanMorrison-Woodbury formula for updating matrices. Under suitable conditions, we prove the local linear convergence of the new method. An algorithm is presented to find the solution of the quadratic matrix equation and some numerical results are given to show the feasibility and the effectiveness of the algorithm. In addition, we also describe and analyze the block version of the modified Bernoulli iteration method.

关键词： Quadratic matrix equation Quadratic eigenvalue problem Solvent Bernoulli's iteration Newton's method Local convergence.

Generating CD8αα IELs from two sources of thymic precursors

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Cellular & Molecular Immunology 2018年第6期15卷 640-641页

作者： Lu bai hui Peng Institute of Immunology and The CAS Key Laboratory of Innate Immunity and Chronic Disease School of Life Sciences and Medical CenterUniversity of Science and Technology of ChinaHefeiAnhui 230027China

As the interface between the gut lumen and the body,the intestinal epithelial layer is continuously exposed to large numbers of microbial and dietary ***,intestinal homeostasis requires sophisticated immune networks that effectively clear pathogenic microbes while maintaining tolerance to harmless *** achieve this balance,intraepithelial lymphocytes(IELs)that are scattered among intestinal epithelial cells carry out numerous important functions.

关键词： homeostasis dietary carry