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Hydrothermal Synthesis,Crystal Structure and Spectral Characterization of a New Copper Isopolytungstate: [Cu(phen)_3][W_6O_(19)]

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Chinese Journal of Structural Chemistry 2006年第7期25卷 837-843页

作者： MENG fan-Xia LIU kun CHEN Ya-Guang Institute of Polyoxometalate Chemistry Faculty of Chemistry Northeast Normal University Changchun 130024 China

An unusual inorganic-organic hybrid hexatungstate complex [Cu（phen）3][W6O19] 1 （C36H24 CuN6O19W6, Mr= 2011.20） was hydrothermally synthesized and characterized by singlecrystal X-ray diffraction, IR spectrum, UV-VIS spectrum and elemental analyses. This compound crystallizes in the monoclinic system, space group C2/c with a = 19.1005（11）, b = 11.2585（11）, c = 20.2867（15） A, β= 102.177（2）°, V= 4264.4 A^ 3, μ（MoKa） = 16.691 mm^-1, Dc = 3.133 g/cm^3, Z = 4, F（000） = 3628, the final R = 0.0338 and wR = 0.0798 for 4090 observed reflections with I 〉 2σ（I）. The result of structure determination shows that the crystal structure is constructed from [W6O19]^2- cluster anions and [Cu（phen）3]^2＋ complex fragments, which are held together into a three-dimensional network through hydrogen-bonding interactions.

关键词： hydrothermal synthesis tungstates polyoxometalates copper coordination complexes

Transitional phenomenon of particle dispersion in gas-solid two-phase flows

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Chinese Science Bulletin 2007年第3期52卷 408-417页

作者： LUO kun fan JianRen CEN KeFa State Key Laboratory of Clean Energy Utilization Zhejiang University Hangzhou 310027 China

Without using any turbulent model, direct numerical simulation of a three-dimensional gas-solid two-phase turbulent jet was performed by finite volume method. The effects on dispersion of particles with different Stokes numbers by the transitional behavior of turbulent structures were investigated. To produce high-resolution results and reduce the computation and storage, the fractional-step projection algorithm was used to solve the governing equations of gas phase fluid. The low-storage, three-order Runge-Kutta scheme was used for time integration. The governing equations of particles were solved in the Lagrangian framework. These numerical schemes were validated by the good agreement be-tween the statistical results of flow field and the related experimental data. In the study of particle dis-persion, it was found that the effects on particle dispersion by the spanwise vortex structures were prominent. The new behaviors of particle dispersion were also observed during the evolution of the flow field, i.e. the transitional phenomenon of particle dispersion occurs for the particles with small and intermediate Stokes numbers.

关键词：气固两相流颗粒分散瞬变现象湍流模型直接数值模拟

Cloning and Expression of Low Molecular Weight Glutenin Genes from the Chinese Elite Wheat Cultivar ＂Xiaoyan 54＂

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Journal of Integrative Plant Biology 2006年第2期48卷 212-218页

作者： Xin-Yu Wang kun-fan Liu Wang-Zhen Guo College of Life Sciences Nanjing Agricultural University Nanjing 210095 China Institute of Genetics and Developmental Biology the Chinese Academy of Sciences Beijing 100101 China State Key Laboratory of Crop Genetics ＆ Germplasm Enhancement Nanjing Agricultural University Nanjing 210095 China

The low molecular weight （LMW） glutenln subunlts account for 40% of wheat gluten protein content by mass and these proteins are considered to significantly affect dough quality characteristics. Five new full-length LMW glutenln genes （designated LMW-5, LMW-7, LMW-42, LMW-58, and LMW-34） were isolated from the Chinese elite wheat cultivar ＂Xlaoyan 54＂ by PCR amplification of genomlc DNA using a pair of degenerate primers designed from the conserved sequences of the N- and C-terminal regions of published LMW glutenln genes. Deduced amino acid sequence analysis showed that LMW-5 belongs to the LMW-i type genes and that the other four belong to LMW-m type genes. Sequence comparisons revealed that point mutations occasionally occurred in signal peptide and N-terminus domains and often existed in domain III and domain V. Small insertions and deletions are represented in the repetitive domain. There is a stop codon after amino acid position 110 In the repetitive domain of LMW.34, indicating that It is a pseudogene. The other four genes have complete open reading frames and the putative mature regions of these genes were subcloned Into pET-30a expression vector and successfully expressed in Escherlchla coll. Protein sodium dodecyl sulfate-polyacrylamlde gel electro- phoresls analysis showed that all proteins expressed in E. coil by the four genes could be related to B-group LMW glutenln subunits of wheat.

关键词： low molecular weight glutenin subunit M-type low molecular weight glutenin gene I-type low molecular weightglutenin gene.

Endometrial stromal sarcoma extending to the pulmonary artery:A rare case report

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World Journal of Clinical Cases 2020年第22期8卷 5625-5631页

作者： Jian-kun fan Guang-Cai Tang Han Yang Department of Radiology The Affiliated Hospital of Southwest Medical UniversityLuzhou 646000Sichuan ProvinceChina

BACKGROUND Endometrial stromal sarcoma(ESS)is a rare malignant mesenchymal *** in the disease,the findings on magnetic resonance imaging are similar to those of *** the lesion involves both vascular and cardiac tissue,it might be misdiagnosed as intravenous leiomyomatosis,which is not common in the *** SUMMARY We present the case of a 34-year-old female patient with tumor embolus,which extended from the right iliac vein and ovarian vein to the inferior vena cava(IVC),and then to the right atrium and right ventricle,and finally protruded into the pulmonary *** patient had undergone a hystero-myomectomy 7 years *** on the findings of the imaging examinations,the diagnosis of intravenous leiomyomatosis was considered *** patient then underwent complete resection of the endovascular and intracardiac tumor *** postoperative pathology results confirmed metastatic ESS with endovascular and intracardiac *** patient was discharged from hospital in good condition,and there was no sign of recurrence 5 mo after the *** Extending from the iliac vein and ovarian vein to the IVC,this metastatic ESS invaded both vascular and cardiac *** patients with ESS involving vascular and cardiac tissues,pathological examinations are essential for the differential diagnosis,such as intravenous *** addition,due to the high recurrence rate of ESS,long-term and close follow-up evaluation is necessary.

关键词： Endometrial stromal sarcoma Pulmonary artery Inferior vena cava Intracardiac extension Endovascular extension Case report

Design,synthesis and preliminary bio-evaluation of glucose-cholesterol derivatives as ligands for brain targeting liposomes

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Chinese Chemical Letters 2011年第7期22卷 831-834页

作者： fan Lei Wei fan Xian kun Li Shan Wang Li Hai Yong Wu Key Laboratory of Drug Targeting and Drug Delivery Systems West China School of Pharmacy Sichuan University Chengdu 610041 China

A series of glucose-cholesterol derivatives 8a-8e as ligands for brain targeting liposomes were synthesized. The preparation of compound 6 involved temporary protection of glucose with chlorotrimethylsilicane and hexamethyldisilazane followed by selectively hydrolyzed. The known cholesteryl tosylate 1 were coupled to ethylene glycols to afford alcohol 2a-2e. Substitution and deprotection of alcohol 2a-2e furnished the acids 4a-4e, which was condensed with compound 6 to get compounds 7a-7e, and then was deprotected in tetrahydrofuran with TFA to obtain the title compounds. As a model drug, tegafur was entrapped by liposomes coupled with 8b, and preliminary in vivo evaluation shown 8b could enhance the ability of liposomes delivering tegafur across the blood brain barrier.

关键词： Liposome ligands Brain target GLUTt transporter Tegafur Synthesis

Low Cycle Fatigue Behavior and Cyclic Softening of P92 Ferritic-martensitic Steel

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Journal of Iron and Steel Research International 2015年第6期22卷 534-542页

作者： Zhen ZHANG Zheng-fei HU Li-kun fan Bin WANG School of Materials Science and Engineering Tongji University Shanghai Key Laboratory for Engineering Materials Application Evaluation Shanghai Research Institute of Materials

The low cycle fatigue （LCF） behavior of P92 martensitic steel was investigated under different controlled strain amplitudes at room and high temperatures （873 K）. The cyclic stress responses at all temperatures and strain amplitudes exhibited obviously rapid softening behavior at the early stage of fatigue life, and there was no saturated stage at high temperature. The fracture surfaces of the fatigue samples were observed by scanning electron microsco py （SEM） and optical microscopy. It was shown that crack initiation and propagation occurred transgranularly at both testing temperatures. A typical character was the high density crack branches or secondary cracks along fatigue striations at high temperature, which initiated from the oxidized inclusions and grain boundaries. Further investiga- tion by transmission electron microscopy （TEM） showed that the softening behavior was attributed to the micro- structure evolution during fatigue life, such as annihilation of dislocations and migration of martensite laths as well as carbide coarsening, especially for samples tested at high temperature.

关键词： low cycle fatigue P92 steel oxidative damage cyclic softening

Tuning electronic structure of Pt to enhance ethanol electrooxidation performance of SnO_(2) patched ultrathin PtRhNi nanowires

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Rare Metals 2023年第11期42卷 3614-3621页

作者： Xiao-kun fan Wen Chen Yun-Hua Zhu Wen-Hui Wang Bay Area Center for Electron Microscopy Songshan Lake Materials LaboratoryDongguan523808China School of Civil and Environmental Engineering Harbin Institute of TechnologyShenzhen518055China State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and EngineeringTongji UniversityShanghai200092China

Developing highly active and stable Pt-based nanocatalysts towards the ethanol oxidation reaction(EOR)is still a challenge for the commercialization of direct ethanol fuel ***,SnO_(2) patched ultrathin PtRhM(M=Ni or C... 详细信息

关键词： nanowires electronic structure

Special Topic:Resonance Spectroscopy and Spectrometry

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Journal of Analysis and Testing 2021年第3期5卷 195-196页

作者： Mei-kun fan Cheng-Zhi Huang Faculty of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengdu 611756China College of Pharmaceutical Sciences Southwest UniversityChongqing 400715China

Resonance exists very commonly ranging from elementary particles to large celestial bodies,creating variety of new things and *** a typical forced vibration,resonance makes a physical system to absorb more energy from the surrounding environment at its natural vibration frequency,leading up to enhancement eff ect and bringing new opportunities to improve sensitivity in analytical chemistry.

关键词： chemistry. elementary absorb

Gemcitabine-based combination therapy compared with gemcitabine alone for advanced pancreatic cancer： a meta-analysis of nine randomized controlled trials

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Hepatobiliary & Pancreatic Diseases International 2017年第3期16卷 236-244页

作者： Shui-fang Jin Zhao-kun fan Lei Pan Li-Ming Jin Intensive Care Unit First Affiliated Hospital Zhejiang Chinese Medical University Hangzhou 310006 China Department of Oncology First Affiliated Hospital Zhejiang Chinese Medical University Hangzhou 310006 China Department of General Surgery Zhejiang Provincial People's Hospital Hangzhou 310014 China

BACKGROUND： Pancreatic cancer is one of the most aggressive malignancies and chemotherapy is an effective strategy for advanced pancreatic cancer. Gemcitabine （GEM） is one of first-line agents. However, GEM-based combination therapy has shown promising efficacy in patients with advanced pancreatic cancer. This meta-analysis aimed to compare the efficacy and safety of GEM-based combination therapy versus GEM alone in the treatment of advanced pancreatic *** SOURCES： A comprehensive search of literature was performed using PubMed, EMBASE, Web of Science and Cochrane Central Register of Controlled Trials. A quantitative meta-analysis was performed based on the inclusion criteria from all eligible randomized controlled trials. The outcome indicators included overall survival （OS）, 6-month survival, 1-year survival, progression-free survival/time-to-progression （PFS/TTP）, and toxicities. RESULTS： A total of nine randomized controlled trials involving 1661 patients were included in this meta-analysis. There was significant improvement in the GEM-based combination therapy with regard to the OS （HR=0.85, 95% CI： 0.76-0.95, P=0.003）, PFS （HR=0.76, 95% CI： 0.65-0.90, P-0.002）, 6-month survival （RR=1.09, 95% CI： 1.01-1.17, P=0.03）, and the overall toxicity （RR=l.68, 95% CI： 1.52-1.86, P〈0.01）. However, there was no significant difference in the 1-year ***： GEM-based combination chemotherapy might improve the OS, 6-month survival, and PFS in advanced pancreatic cancer. However, combined therapy also added toxicity.

关键词： gemcitabine pancreatic cancer chemotherapy cisplatin S-1 meta-analysis