检索结果-南通市图书馆

The value of ^(99m)Tc methylene diphosphonate bone scintigraphy in diagnosing relapsing polychondritis

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2006年第13期119卷 1129-1132页

作者： SHI Xu-hua ZHANG Feng-chun CHEN Li-bo ouyang meng Department of Rheumatology Department of Nuclear Medicine Peking Union Medical College Hospital Chinese Academy of Medical Sciences Beijing 100730 China

Relapsing polychondritis （RP） is a recurrent disease involving cartilage mainly of the ear,nose, larynx, trachea, and bronchus. The typical manifestations of the disease in the ear and nose can be easily recognized, but the symptoms could be ignored or easily confused with those of other diseases when the cartilage of other sites is involved. Thus, it is necessary to develop a new technique for the diagnosis of this disease. Few cases of abnormal accumulation of radioactivity at cartilage shown by ^99mTc methylene diphosphonate （MDP） bone scintigraphy are described in the literature. In this report, we present 4 patients of whom 3 had positive findings on ^99mTc MDP bone scintigraphy with an assessment of ^99mTc MDP bone scintigraphy in the diagnosis of RP.

关键词： relapsing polychondritis ^99mTc methylene diphosphonate bone scintigraphy

Femtosecond Studies on Third-Order Optical Nonlinearities of Polyanilines

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 1994年第8期11卷 491-493页

作者： WANG Hui LAI Tianshu LIN Weizhu MO Dang ouyang meng GONG Kecheng Department of Physics Zhongshan UniversityGuangzhou 510275 Department of Polymer South China University of TechnologyGuangzhou 510641

The ultrafast dynamics of third order nonlinearities of polyaniline(PAn)and polyaniline doped in polymethyl mathacrylate(PAn-PMMA)films are investigated using femtosecond absorption *** ultrafast initial exciton deformation time of about 100fs is observed in PAn *** PAn-PMMA film,the third-order nonlinearity results in an efficient two-photon absorption at about 2eV.

关键词： spectroscopy film absorption

Mussel-inspired Methacrylic Gelatin-dopamine/Ag Nanoparticles/Graphene Oxide Hydrogels with Improved Adhesive and Antibacterial Properties for Applications as Wound Dressings

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2024年第2期39卷 512-521页

作者：宿正楠 HU Yanru meng Lihui ouyang Zhiyuan LI Wenchao ZHU Fang XIE Bin 吴庆知 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Biomedical Material and Engineering Center of Hubei ProvinceWuhan University of TechnologyWuhan 430070China

A novel strategy was developed to prepare the methacrylic gelatin-dopamine(GelMA-DA)/Ag nanoparticles(NPs)/graphene oxide(GO) composite hydrogels with good biocompatibility,mechanical properties,and antibacterial ***-inspired DA was utilized to modify the GelMA molecules,which imparts good adhesive performance to the ***,interfacial enhancer,not only improves mechanical properties of the hydrogels,but also provides anchor sites for loading Ag NPs through numerous oxygencontaining functional groups on the *** experimental results show that the GelMA/Ag NPs/GO hydrogels have good biocompatibility,and exhibit a swelling rate of 202±16%,the lap shear strength of 147±17 kPa,and compressive modulus of 136±53 kPa,in the case of the Ag NPs/GO content of 2 mg/*** activity of the hydrogels against both gram-negative and gram-positive bacteria is dependent on the Ag NPs/GO content derived from the release of Ag^(+).Furthermore,the GelMA/Ag NPs/GO hydrogels possess good adhesive ability,which is resistant to highly twisted state when stuck on the surface of *** results demonstrate promising potential of the GelMA-DA/Ag NPs/GO hydrogels as wound dressings for biomedical applications in clinical and emergent treatment.

关键词： GelMA dopamine,graphene oxide adhesion antibacterial ability

Review of bio-inspired image sensors for efficient machine vision

在线全文

学校读者我要写书评

暂无评论

Advanced Photonics 2024年第2期6卷 7-19页

作者： Wenhao Tang Qing Yang Hang Xu Yiyu Guo Jiqiang Zhang Chunfang ouyang Leixin meng Xu Liu Zhejiang Laboratory Research Center for Frontier Fundamental StudiesHangzhouChina Zhejiang University College of Optical Science and EngineeringState Key Laboratory of Extreme Photonics and InstrumentationHangzhouChina ZJU-Hangzhou Global Scientific and Technological Innovation Center HangzhouChina Shanghai Jiao Tong University Chip Hub for Integrated Photonics Xplore(CHIPX)WuxiChina

With the rapid development of sensor networks,machine vision faces the problem of storing and computing massive *** human visual system has a very efficient information sense and computation ability,which has enlightening significance for solving the above problems in machine *** review aims to comprehensively summarize the latest advances in bio-inspired image sensors that can be used to improve machine-vision processing *** briefly introducing the research background,the relevant mechanisms of visual information processing in human visual systems are briefly discussed,including layerby-layer processing,sparse coding,and neural ***,the cases and performance of image sensors corresponding to various bio-inspired mechanisms are ***,the challenges and perspectives of implementing bio-inspired image sensors for efficient machine vision are discussed.

关键词： bio-inspired image sensor machine vision layer-by-layer processing sparse coding neural adaptation

Charge collection narrowing mechanism in electronic-grade-diamond photodetectors

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Opto-Electronic Advances 2024年第6期7卷 1-3页

作者： Xiaoping ouyang State Key Laboratory of Intense Pulsed Radiation Simulation and Effect and Radiation Detection Research Center Northwest Institute of Nuclear TechnologyXi’an 710024China

Recently,an extreme narrowband spectral response of only 8 nm in electronic-grade diamond-based photodetectors has been observed by Zheng Wei and his colleagues from Sun Yat-sen University for the first time.A charge collection narrowing mechanism assisted by free exciton radiative recombination is proposed,which well reveals the characteristic spectral response of diamond.

关键词： mechanism electronic extreme

Structurally Flexible 2D Spacer for Suppressing the Electron-Phonon Coupling Induced Non-Radiative Decay in Perovskite Solar Cells

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2024年第9期16卷 325-340页

作者： Ruikun Cao Kexuan Sun Chang Liu Yuhong Mao Wei Guo Ping ouyang Yuanyuan meng Ruijia Tian Lisha Xie Xujie Lü Ziyi Ge Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201People’s Republic of China School of Materials Science and Chemical Engineering Ningbo UniversityNingbo 315211People’s Republic of China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049People’s Republic of China Center for High Pressure Science and Technology Advanced Research(HPSTAR) Shanghai 201203People’s Republic of China

This study presents experimental evidence of the dependence of non-radiative recombination processes on the electron-phonon coupling of perovskite in perovskite solar cells(PSCs).Via A-site cation engineering,a weaker electron-phonon coupling in perovskite has been achieved by introducing the structurally soft cyclohexane methylamine(CMA^(+))cation,which could serve as a damper to alleviate the mechanical stress caused by lattice oscillations,compared to the rigid phenethyl methylamine(PEA^(+))*** demonstrates a significantly lower non-radiative recombination rate,even though the two types of bulky cations have similar chemical passivation effects on perovskite,which might be explained by the suppressed carrier capture process and improved lattice geometry *** resulting PSCs achieve an exceptional power conversion efficiency(PCE)of 25.5%with a record-high opencircuit voltage(V_(OC))of 1.20 V for narrow bandgap perovskite(FAPbI_(3)).The established correlations between electron-phonon coupling and non-radiative decay provide design and screening criteria for more effective passivators for highly efficient PSCs approaching the Shockley-Queisser limit.

关键词： Electron-phonon coupling A-site cation engineering Non-radiative recombination

Stable watt-level mode-locked noise-like pulse from an all-PM fiber oscillator at 2 μm

在线全文

学校读者我要写书评

暂无评论

Chinese Optics Letters 2024年第6期22卷 154-157页

作者： meng Wang Junjia Ding Deqin ouyang Yewang Chen Junqing Zhao Xing Liu Shuangchen Ruan Key Laboratory of Advanced Optical Precision Manufacturing Technology of Guangdong Higher Education Institutes Sino-German College of Intelligent ManufacturingShenzhen Technology UniversityShenzhen 518118China

We have experimentally presented a watt-level noise-like (NL) pulse mode-locked all-polarization-maintaining(PM) fiber laser centered at ~1995 nm, which can directly generate stable NL pulses with a maximum output power of ~1.017 W and pulse energy of ~0.61 μJ, representing the highest output power of mode-locked NL pulse at 2 μm from any fiber oscillators,to the best of our knowledge. The mode-locked NL pulse laser exhibits an excellent stability with a power fluctuation of~0.1% in 8 h of monitoring, and a signal-to-noise ratio of ~83 dB at a fundamental frequency of ~1.662 MHz. Moreover, the pulse envelope and coherence spike width of the NL pulse can be widely tuned from ~4.5 ns to ~16 ns, and ~364 fs to~323 fs, respectively, with the enhancement of the pump power. Such an all-PM fiber oscillator is the ideal seed source for the implementation of a high-power NL pulse laser and has potential valuable applications in mid-infrared spectroscopy and industrial processing.

关键词： Tm-doped fiber laser mode locking noise-like pulse

Incorporating metal nanoparticles in porous materials via selective heating effect using microwave

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第4期17卷 3175-3179页

作者： Yingyu Zhou Jiacheng Liu Fuyuan Sun Junchen ouyang Ruifa Su Fanchen meng Yongqi Luo Cheng Xu Weina Zhang Suoying Zhang Fengwei Huo Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) Nanjing Tech UniversityNanjing 211816China

Metal nanoparticle@porous material composites have attracted increasing attention due to their excellent synergistic catalytic ***,it is a challenge to introduce metal nanoparticles into cavities of porous materials without agglomeration on the *** the progress achieved,a universal approach that can integrate different kinds of metal nanoparticles and porous materials is still highly *** we report a facile and general approach to fabricating metal nanoparticle@porous materials by microwave-triggered selective *** microwave can pass through the non-polar solvent and act on the polar solvent in the porous materials,causing the polar solvent to be heated,vaporized,and away from the pores of porous *** local void produced by the escape of polar solvent facilitates non-polar solvent containing metallic precursor to be dragged into the narrow pores,followed by further reduction,resulting in the complete encapsulation of nanoparticles.A series of metal nanoparticles@porous materials,ranging from metal-organic frameworks(MOFs)to zeolites,are successfully prepared by this method and show excellent size selectivity in catalytic reactions.

关键词： porous material nanoparticle encapsulation microwave synthesis selective heating effect selective catalysis

Electroacupuncture ameliorates blood-brain barrier disruption after ischemic stroke through histone acetylation regulation at the matrix metalloproteinase 9 and tissue inhibitor of metalloproteinase 2 genes

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Traditional Chinese Medicine 2024年第4期44卷 734-744页

作者： CHEN Yonglin ouyang Ling meng Lingling WU Bufan PENG Rou LIU Sitong HOU Dan WANG Yaling JING Xinyue LU Shengfeng FU Shuping Key Laboratory of Acupuncture and Medicine Research of Ministry of Education Nanjing University of Chinese Medicine

OBJECTIVE: To explore whether the regulation of matrix metalloproteinase 9(MMP-9)/tissue inhibitors of MMPs(TIMPs) gene expression through histone acetylation is a possible mechanism by which electroacupuncture(EA)protects blood-brain barrier(BBB) integrity in a middle cerebral artery occlusion(MCAO) rat ***: Male Sprague-Dawley rats were divided into four groups: the sham group, the MCAO group, the MCAO + EA(MEA) group, and the MCAO + EA + HAT inhibitor(HATi) group. The MCAO model was generated by blocking the middle cerebral artery. EA was applied to Baihui(GV20). Samples were collected 1 or 3 d after reperfusion. Neurological function scores and Evans blue extravasation were employed to evaluate the poststroke injury. The effect of EA on MMP-9/TIMPs gene expression was assessed by real-time fluorescence quantitative polymerase chain reaction(RT-qPCR) and chromatin immunoprecipitation(ChIP). RESULTS: Our results showed that EA treatment prominently improved neurological function and ameliorated BBB disruption. The RT-qPCR assay showed that EA reduced the expression of MMP-9 and promoted TIMP-2 mRNA expression, but HATi reversed these effects of EA. In addition, ChIP results revealed that EA decreased the enrichment of H3K9ace/H3K27ace at MMP-9 promoters and notably stimulated the recruitment of H3K9ace/H3K27ace at TIMP-2 promoter. CONCLUSION: EA treatment at Baihui(GV20) regulates the transcription of MMP-9 and TIMP-2 through histone acetylation modification in the acute stage of stroke, which preserves the structural integrity of the BBB in MCAO rats. These findings suggested that the histone acetylation-mediated transcriptional activity of target genes may be a crucial mechanism of EA treatment in stroke.

关键词： blood-brain barrier electroacupuncture histone acetylation matrix metalloproteinase 9 tissue inhibitor of metalloproteinases

同方期刊数据库