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Experiment of drag characteristics of a novel variable geometry flame-holder

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航空动力学报 2011年第11期26卷 2485-2494页

作者： LIU Yang jin Jie WANG Hui-ru LIU yu-ying YANG Mao-lin School of Jet Propulsion Beijing University of Aeronautics and AstronauticsBeijing 100191China

A novel variable geometry flame-holder(VGF) based on V-gutter was *** structural characteristics of the flame holder were *** study on drag characteristics of the VGF on un-burning and burning states was conducted in a rectangular combustion test *** influence of the change of gutter trailing edge width w on pressure recovery in different operating conditions was analyzed ***,drag characteristics in different trailing edge width variation modes were *** show that:(1) Narrowing w can observably raise the total pressure recovery σ but the highest σ is not obtained at minimum w.(2) The relationship of drag coefficient ψ and w in the un-burning conditions can be well expressed in a form of exponential equation(w/d>0.4).(3) Drag characteristics are not sensitive to the variation modes and speeds of w.(4) In the burning condition,σ decreases with the increasing of w basically and the course can be divided into three *** results and experimental data presented in this paper would enhance the phenomenological understanding of this type of VGF,and would contribute to the next experimental study and numerical calculus of this novel VGF.

关键词： flame-holder variable geometry afterburner augmentor drag characteristics

Characterization of Mass Spectra of Aluminum Anion Clusters Generated by Laser Vaporization and Pulsed Molecular Beam Techniques

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Chinese Physics Letters 1996年第11期13卷 829-832页

作者： NI Guo-quan ZHOU ru-fang ZHAI Hua-jin WANG yu-zhu Shanghai Institute of Optics and Fine Mechanics Joint Laboratory for Quantum OpticsChinese Academy of SciencesShanghai 201800

Aluminum anion clusters are generated by laser vaporization and molecular beam *** abundance spectra exhibit a pronounced odd-even alternation for clusters ranging from n=5 to n=17,which is related to the presence of trace oxygen and water resident in He carrier gas and explained by electron pairing *** addition,confirmation of jellium model predictions is revealed at peaked A113-,and for the first time at Al_(7)O^(-).A local maximum Al7-is also observed.

关键词： confirmation pairing Molecular

S-acylation of YKT61 modulates its unconventional participation in the formation of SNARE complexes in Arabidopsis

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Journal of Genetics and Genomics 2024年第10期51卷 1079-1088页

作者： Ting Ma Jun-ru Tan jin-yu Lu Sha Li Yan Zhang College of Life Sciences Shandong Agricultural UniversityTaianShandong 271018China Frontiers Science Center for Cell Responses College of Life SciencesNankai UniversityTianjin 300071China

Hetero-tetrameric soluble N-ethylmaleimide-sensitive factor attachment protein receptors(SNAREs)complexes are critical for vesicle-target membrane fusion within the endomembrane system of eukaryotic *** assembly involves four different SNARE motifs,Qa,Qb,Qc,and R,providedby three orfour SNARE ***6 is an atypical R-SNARE that lacks a transmembrane domain and is involved in multiple vesicle-target membrane *** YKT6 is evolutionarily conserved and essential,its function and regulation in different phyla seem *** YKT61,the yeast and metazoan YKT6 homologue,is essential for gametophytic development,plays a critical role in sporophytic cells,and me-diates multiple vesicle-target membrane ***,its molecular regulation is *** report here that YKT61 is *** its S-acylation by a C195S mutation dissociates YKT61 from endomembrane structures and causes its functional *** interacting with various SNARE pro-teins,YKT61functions not as a canonical R-SNAREbut coordinates with otherR-SNAREs to participate in theformationof ***-specific molecular regulation of YKT6 may be evolvedto allow more efficient SNARE assembly in different eukaryotic cells.

关键词： Longin domain S-acylation Vesicle trafficking R-SNARE Arabidopsis thaliana

Hollow carbon spheres and their noble metal-free hybrids in catalysis

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Frontiers of Chemical Science and Engineering 2021年第6期15卷 1380-1407页

作者： Xiang-Hui yu jin-Long Yi ru-Liang Zhang Feng-yun Wang Lei Liu School of Materials Science and Engineering Shandong University of Science and TechnologyQingdao266590China College of Physics and State Key Laboratory of Bio Fibers and Eco Textiles Qingdao UniversityQingdao 266071China

Hollow carbon spheres have garnered great interest owing to their high surface area,large surface-tovolume ratio and reduced transmission ***,we overview hollow carbon sphere-based materials and their noble metal-free hybrids in ***,we summarize the key fabrication techniques for various kinds of hollow carbon spheres,with a particular emphasis on controlling pore structure and surface morphology,and then heterogeneous doping as well as their metal-free/containing hybrids are presented;next,possible applications for non-noble metal/hollow carbon sphere hybrids in the area of energy-related catalysis,including oxygen reduction reaction,hydrogen evolution reaction,oxygen evolution reaction,water splitting,rechargeable Zn-air batteries and pollutant degradation are discussed;finally,we introduce the various challenges and opportunities offered by hollow carbon spheres from the perspective of synthesis and catalysis.

关键词： hollow carbon spheres functionalization noble metal-free catalysis

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葡萄籽原花青素抗衰老作用的研究

食品与药品 2020年第6期22卷 448-452页

作者：方欢乐于晋茹陶炎炎张慧刘建利西安培华学院医学院陕西西安710125

目的观察葡萄籽原花青素(grape seed proanthocyanidin extract,GSPE)对D-半乳糖致衰老模型小鼠的抗衰老作用。方法将小鼠随机分为空白组、模型组、GSPE低、中、高剂量组、维生素C阳性对照组,采取注射D-半乳糖30 d致小鼠衰老模型,灌胃... 详细信息

目的观察葡萄籽原花青素(grape seed proanthocyanidin extract,GSPE)对D-半乳糖致衰老模型小鼠的抗衰老作用。方法将小鼠随机分为空白组、模型组、GSPE低、中、高剂量组、维生素C阳性对照组,采取注射D-半乳糖30 d致小鼠衰老模型,灌胃给药治疗60 d后,测定小鼠脾脏、胸腺、肝脏指数;生化法测定小鼠肝组织、血液中超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)、丙二醛(MDA)含量及皮肤组织中SOD、GSH-Px、羟脯氨酸(HYP)含量;HE染色观察肝脏形态变化。结果 GSPE中、高剂量组脾脏、胸腺、肝脏指数显著改善,肝组织、血液及皮肤组织中SOD、GSH-Px含量显著增加,MDA及HYP含量显著降低。肝细胞形态和排列趋于正常,炎症情况减轻。结论 GSPE对D-半乳糖致衰老模型小鼠氧化应激反应的各项生化指标及肝脏组织病理状态有一定的改善作用。

关键词：葡萄籽原花青素 D-半乳糖抗氧化作用抗衰老作用

INFLUENCE OF MIMIC CARDIAC RATE ON HYDRODYNAMICS OF DIFFERENT MECHANICAL PROSTHETIC CARDIAC VALVES IN VITRO

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Chinese Medical Sciences Journal 2005年第2期20卷 138-141,页

作者： Yin-pingChu jin-lianCheng ru-kunChen yu-boFan FangPu DepartmentofThoracic＆CardiovascularSurgery SecondAffiliatedHospital DepartmentofNursingResearch FirstAffiliatedHospitalShanxiMedicalUniversityTaiyuan030001 DepartmentofThoracic＆CardiovascularSurgery SecondHospitalZhejiangUniversityHangzhou310009 BiomedicalEngineeringCenter SichuanUniversityChengdu610065

Objective To assess the influence of mimic cardiac rate on hydrodynamics of different mechanical prosthetic cardiac valves. Methods US-made CarboMedics bileaflet valve, China-made Jiuling bileaflet valve and C-L tilting disc valve were tested via a pulsatile flow simulator in the aortic position. Testing conditions were set at mimic cardiac rates of 55 bpm, 75 bpm, 100 bpm with a constant mimic cardiac output of 4 L/min. The mean pressure differences (ΔP), leakage volumes (LEV) and closing volumes (CLV) across each valve, and effective orifice areas (EOA) were analyzed. Results Within physiological range, ΔP, LEV, and CLV decreased as mimic cardiac rate increased, with a large extent of variance. EOA increased along with an increase in mimic cardiac rate. It was a different response in terms of cardiac rate alteration for different types of mechanical prosthetic cardiac valves. Conclusion Mimic cardiac rate change affects hydrodynamics of mechanical prosthetic cardiac valves. Within physiological range, the hydrodynamic of prosthetic bileaflet valve is better than that of tilting disc valve.

关键词： mimic cardiac rate mechanical prosthetic cardiac valves hydrodynamics

Syntheses,Structures,and Luminescent Properties of New Zn~Ⅱ-Y~Ⅲ and Zn~Ⅱ-Ln~Ⅲ Schiff Base Complexes

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Chinese Journal of Structural Chemistry 2015年第8期34卷 1273-1280页

作者： HU jin-Fa QIN Ya-ru LI yu LIU Wei WANG Yong LI Ya-Hong College of Chemistry Chemical Engineering and Materials ScienceSoochow University

Eight new ZnⅡ-yⅢ and ZnⅡ-LnⅢ heterometallic Schiff base complexes： MZnL2（NO3）3 （M = Y （1）, La （2）, Pr （3）, Nd （4）, Eu （5）, Gd （6）, Dy （7）, Er （8）; L = 2-（（（2- （imidazo[1,5-a]pyridin-3-yl）phenyl）imino）methyl）-6-methoxyphenol）, have been rationally synthesized under solvothermal conditions and characterized by IR, elemental analyses （EA）, single-crystal X-ray diffraction, and powder XRD. Furthermore, luminescence in the visible region for solids 1-8 suggested zine/ligand-centered emission at room temperature.

关键词： heterometallic complex, crystal structure, luminescence

Photoionization Time-of-Flight Mass Spectra of Aluminum Clusters-Associated Complexes

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Chinese Physics Letters 1997年第9期14卷 663-666页

作者： NI Guo-quan ZHOU ru-fang ZHAI Hua-jin WANG yu-zhu Laboratory for Quantum Optics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800

Using a laser vaporization/pulsed molecular beam source,photoionization time-of-flight mass spectra of bare aluminum clusters Aln(n up to larger than 70)and of carbon-,oxygen-,and hydrogen-adducted aluminum clusters-associated complexes are *** cause of the observed odd-even alternation in reactivity of Aln and the formation mechanism of the informative products are discussed.

关键词： reactivity mechanism clusters

Photoionization Mass Spectrometric Study of Neutral Bare Aluminum Clusters and Aluminum-Carbon Mixed Clusters

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Chinese Physics Letters 1997年第12期14卷 901-904页

作者： NI Guo-quan ZHOU ru-fang ZHAI Hua-jin WANG yu-zhu Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciencesand Joint Laboratory for Quantum OpticsChinese Academy of SciencesShanghai 201800

Photoionization time of flight mass spectra of bare aluminum and aluminum-carbon mixed clusters as well as a variety of oxygen-and oxygen-carbon-adducted aluminum clusters are recorded and *** discontinuities in the mass abundance spectra at AI_(7),AI_(13),AI_(23),AI_(7)C,AI_(13)C,and AI_(24)C are *** findings are interpreted in terms of the electronic and geometric structures of these species.

关键词： species finding assigned