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research on Flexural Fatigue of Fiber Bundles for Lay-flat Hose

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Research on Flexural Fatigue of Fiber Bundles for Lay-flat H...

A modified averaging scheme with application to the secondary Hopf bifurcation of a delayed van der pol oscillator

2012 China Functional Materials Technology and Industry Forum

作者： Zhong-yao Huang Li-hai Cai Jian-Xiong Yang pol research institute of General Logistics Department PLA

This paper studies the flexural fatigue performance for hose reinforcement layer fiber bundles including polyester fibers,para-aramid fiber and liquid crystal polyester *** fatigue life and changes of three fiber bundles strength during the course of fatigue development were *** of three fiber bundles was observed by scanning electron *** the analysis of the molecular structure of the three fibers,the Molecular chain flexibility is one of the main factors of impacting resistance to bending fatigue *** crystal polyester fiber bundles have excellent mechanical properties and the high strength retention in bending fatigue test, which is an ideal material for the production of high-strength hose.

关键词： flexural fatigue bending fatigue lay-flat hose collapsible hose polyester fiber para-aramid fiber liquid crystal polyester fiber

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Acta Mechanica Sinica 2008年第4期24卷 449-454页

作者： Z.H.Wang H.Y.Hu institute of Sciences PLA University of Science and Technology Nanjing 211101 China institute of Vibration Engineering research Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

In this paper, a modified averaging scheme is presented for a class of time-delayed vibration systems with slow variables. The new scheme is a combination of the averaging techniques proposed by Hale and by Lehman and Weibel, respectively. The averaged equation obtained from the modified scheme is simple enough but it retains the required information for the local nonlinear dynamics around an equilibrium. As an application of the present method, the delay value for which a secondary Hopf bifurcation occurs is successfully located for a delayed van der pol oscillator.

关键词： Time delay ·Secondary Hopf bifurcation·The averaging technique van der pol oscillator

Investigating the Effect of Methylcyclopentadienyl Manganese Tricarbonyl on the Properties of Unleaded Motor Gasoline (1): Induction Period

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China Petroleum Processing & Petrochemical Technology 2004年第1期6卷 17-22页

作者： Lu Changbo Xiong Chunhua Liu Huiying Wei Rui( pol research institute of General Logistics Department, pla, Beijing 102300) pol Res. Inst. Ceneral Log. Dept. PLA Beijing 102300 China

In this paper, the effect of MMT on the induction period of unleaded motor gasoline was studied, the manganese concentration, storage period of MMT-blended gasoline and environmental variables such as temperature and radiation intensity were considered to be main factors affecting the induction period of gasoline,when MMT-blended gasoline was exposed to light. It is found from experiments that the addition of MMT can improve the induction period of gasoline that is shielded from light, and reduce the induction period remarkably,when the gasoline is exposed to light. However, the radiation intensity is proved to be the leading influencing factor among all the environmental variables investigated.

关键词： MMT gasoline base gasoline induction period stability storage experiment exposure experiment

Effect of the hyaluronic acid-poloxamer hydrogel on skin-wound healing: in vitro and in vivo studies

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Animal Models and Experimental Medicine 2019年第2期2卷 107-113页

作者： Xiaojuan Li Aimin Li Fan Feng Qiyu Jiang Huiwei Sun Yantao Chai Ruichuang Yang Zhijie Wang Jun Hou Ruisheng Li research Center for Clinical and Translational Medicine Fifth Medical Center General Hospital of Chinese PLA Beijing People's Republic of China Department of Rheumatology and Immunology Fifth Hospital of Qingdao City Qingdao Shandong Province People's Republic of China Center for Clinical Laboratory Fifth Medical Center General Hospital of Chinese PLA Beijing People's Republic of China

Background: Recent research into skin injury and wound healing has focused mainly on post‐trauma hemostasis, infection prevention, dermal regeneration and angiogenesis. However, less attention has been paid to air permeability and moisture loss prevention which also play important roles in injury healing. Methods: In the present work, we prepared a hyaluronic acid‐poloxamer (HA‐pol) hydrogel and tested the therapeutic effect of the hydrogel on skin‐wound healing. Results: The HA‐pol hydrogel transformed from sol to gel at 30°C, close to body temperature, and had stable moisturizing properties. HA‐pol hydrogel promoted skin‐wound healing and increased protein accumulation in the wound area. HA‐pol hydrogel allowed greater air permeability than Band‐aid, a typical wound covering. Results from transwell assays showed that the HA‐pol hydrogel effectively isolated skin‐wounds from bacterial invasion. Conclusion: This work demonstrates the advantages of using HA‐pol gel materials in the treatment of cutaneous wounds.

关键词： HA‐pol hydrogel hyaluronic acid poloxamer 407 skin‐wound healing

RNA binding protein TIAR modulates HBV replication by tipping the balance of pgRNA translation

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Signal Transduction and Targeted Therapy 2023年第10期8卷 4889-4902页

作者： Ting Zhang Huiling Zheng Danjuan Lu Guiwen Guan Deyao Li Jing Zhang Shuhong Liu Jingmin Zhao Ju-Tao Guo Fengmin Lu Xiangmei Chen Department of Microbiology and Infectious Disease Center School of Basic Medical SciencesPeking University Health Science CenterBeijing 100191China Department of Pathology and Hepatology The Ffth Medical Center of Chinese PLA General HospitalBeijing 100039China Department of Experimental Therapeutics Baruch S.Blumberg InstituteDoylestownPA 18902USA Bejing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases Peking University Hepatology InstitutePeking University People's HospitalBeijing 100044China

The pregenomic RNA(pgRNA)of hepatitis B virus(HBV)serves not only as a bicistronic message RNA to translate core protein(Cp)and DNA polymerase(pol),but also as the template for reverse transcriptional replication of viral DNA upon packaging into *** it is well known that pgRNA translates much more Cp than pol,the molecular mechanism underlying the regulation of Cp and pol translation efficiency from pgRNA remains elusive.

关键词： translate template translation

Ecofriendly E-Nose Based in pla and Only 0.3 wt%of CNTs

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Journal of Renewable Materials 2019年第4期7卷 355-363页

作者： Laura Ribba Jonathan Cimadoro Silvia Goyanes Universidad de Buenos Aires Facultad de Ciencias Exactas y NaturalesDepartamento de FísicaLaboratorio de Polímeros y Materiales Compuestos(LP&MC)Instituto de Física de Buenos Aires(IFIBA-CONICET)Ciudad Universitaria(1428)Ciudad Autónoma de Buenos AiresArgentina

In this work,conductive polymer nanocomposites were developed based on a biodegradable and biobased polymer(poly(lactic acid)),with the incorporation of only 0.3 wt%of carbon nanotubes(CNTs)to be used as volatile solvent *** correct dispersion of the nanofiller was achieved thanks to a CNT non-covalent modification with an azo-dye(disperse orange 3)which allowed to reach the percolation for electric conduction in values as low as 0.3 wt%.The chemo-resistive properties of the developed sensors were investigated by exposure to organic vapors(ethanol,tetrahydrofuran and toluene)and water vapor,showing good *** addition,considering the manipulation to which the sensor will be exposed,wear resistance was characterized,finding that the incorporation of CNTs produced an increase in more than a 50%.

关键词： poly(lactic acid) carbon nanotubes sensor CPC organic solvent vapor DO3

Expression of polt in tissues and cell lines of transitional cell carcino-ma

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Journal of Medical Colleges of pla(China) 2007年第6期22卷 337-340页

作者：赵谦金锡御杨劲陈志文宋波曾益军位全芳季惠翔李劲周虎传 institute of Urology Southwest HospitalThird Military Medical University Department of Biochemistry and Molecular Biology College of MedicineThird Military Medical Universi-ty

Objective：To explore the expression of DNA polymerase iota in transitional cell carcinoma ceils and tissues; Methods： RT-PCR was applied to detect the expression of polymerase iota in BIU87 and T24 ceils, then the expression of polymerase iota was also detected in the same way in transitional cell car- cinoma which was derived from clinical bladder carcinoma and renal pelvic carcinoma. Results ： The expres- sion of Poh was low in bladder normal membrana mucosa but significantly elevated in transitional cell car- cinoma ceils. Compared with the expression of polymerase iota in bladder normal mucous membranes, the expression of polymerase iota was significantly increased in transitional cell carcinoma tissue （P〈0. 01 ） and associated with the grade of transitional cell carcinoma. Conclusion： The significantly increased ex- pression of polymerase iota may be associated with the generation and development of transitional cell carcinoma, even with its high heterogenicity.

关键词： translesion synthesis DNA polymerase iota transitional cell carcinoma reverse transcription-polymerase chain reaction