检索结果-南通市图书馆

Coarsening behavior of γ' particles in a nickel-base superalloy

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2009年第2期28卷 197-201页

作者： li, Hongyu zuo, lingli Song, Xiping Wang, Yanli Chen, Guoliang State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China

The coarsening behavior of γ particles in a nickel-base superalloy FGH95 was investigated by means of experimental observations and growth kinetics calculations. The results show that when aging at 1000,1080 and 1140°C for different times,the relation of average particle size to time obeys the cube law ( a /2)3= kt,where k is 15.49 × 103,77.5 × 103 and 230.04 × 103 nm3/min,respectively. The particle size distributions are better fit to the LSW theoretical distributions when aging at 1000°C within 1440 min....

关键词： nickel-base superalloys γ particles coarsening behavior particle size distribution activation energy

Using Raman Spectroscopy and ab initio Calculations to Investigate Intermolecular Hydrogen Bonds in Binary Mixture (Tetrahydrofuran+Water)

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2011年第4期27卷 693-696页

作者： WU Nan-nan OUYANG Shun-li li zuo-wei liU Jing-yao GAO Shu-qin State Key Laboratory of Theoretical and Computational Chemistry Institute of Theoretical Chemistry Jilin University Changchun 130021 R R. China College of Physics Jilin University Changchun 130012 P. R. China

We analyzed the properties and structures of the hydrogen-bonded complexes of tetrahydrofuran（THF） and water by means of experimental Raman spectra and ab initio *** optimized geometries and vibrational frequencies of the neat THF molecule and its hydrogen-bonded complexes with water（THF/H2O） were calculated at the MP2/6-311＋G（d,p） level of *** found that the intermolecular hydrogen bonds which are formed from the binary mixtures of the neat THF and water with different molar ratios could explain the changes in wavenumber position and linewidth very *** combination of ab initio calculations and experimental Raman spectral data provides an insight into the hydrogen bonds leading to the concentration dependent changes in the spectral features.

关键词： Hydrogen bond Raman spectroscopy Ab initio calculation

Kudo's pit pattern classification for colorectal neoplasms:A meta-analysis

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2014年第35期20卷 12649-12656页

作者： Ming li Syed Mohsin Ali Syeda Umm-a-OmarahGilani Jing liu Yan-Qing li Xiu-li zuo Department of Gastroenterology Qilu HospitalShandong University

AIM: To analyze the current available evidence of Kudo’s pit pattern classification for diagnosing colorectal neoplasms.

关键词： Meta-analysis Sensitivity Specificity Colonic neoplasia Endoscope Magnifying endoscopy

Development of Biomimetic Needle-like Apatite Nanocrystals by a Simple New Method

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 Materials Science & Technology 2004年第6期20卷 665-667页

作者： Jie WEI, Yubao li, Yi zuo, Xueling PENG and li ZHANGResearch Center for Nano-Biomaterials, Sichuan University, Chengdu 610064, China Res. Ctr. for Nano-Biomaterials Sichuan Univ. Chengdu 610064 China

A new method of calcium nitrate and sodium phosphate as reactants was employed to prepare biomimetic apatite nanocrystals by a simple heating treatment in water. The structure and properties of the apatite crystals were investigated by TEM, XRD, IR, ICP and TG. It is found that the apatite nanocrystals contain OH-, CO32-, Na+ and HPO42- ions in their crystal structure. The crystal water is removed during heating from 200℃ to 400℃. CO32-and HPO42- are decomposed at 600℃ to 800℃, also there is lattice vvater lost at this temperature stage. The morphology of the apatite nanocrystals is needle-like with a length less than 80 nm. The size and crystallinity of the apatite nanocrystals increase with vvater treatment temperature and time. Compared to the apatite crystals sintered at 800℃, water treated apatite nanocrystals are poorly crystallized apatite. The results indicate that the apatite nanocrystals have similarity in composition, structure, morphology and crystallinity to that of bone apatite crystals. It can be used to make apatite crystals/polymer biomimetic bone repair materials or for other biomedicai applications.

关键词： Biomimetic Apatite Nanocrystals Biomedical applications

Effect of CC Coherent Vibration on Relative Raman Scattering Cross Sections of All-trans β-Carotene

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2010年第4期26卷 608-611页

作者： li Zhan-long li Dong-fei SUN Cheng-lin li zuo-wei ZHOU Qiang CAO Jun-sheng GAO Feng-li State Key Laboratory of Superhard Materials Jilin University Changchun 130012 P. R. China College of Physics Jilin Universty Changchun 130021 P. R. China Lab of Excited State Processes Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun 130033 P R. China State Key Laboratory of lntegrated Optoelectronics College of Electronic Science and Engineering Jilin University Changchun 130012 P R. China

We have determined the Raman scattering cross sections（RSCSs） of fl-carotene for C=C and C-C stretching modes, with the 1444 cm^-1 Raman band of cyclohexane as internal standard, in different solvents at low concentrations by measuring Raman intensity. The results show that RSCSs of β-carotene were 10^6-10^7 times larger than the general RSCSs, we analyzed that this enhancement was caused not only by the resonance Raman effect but also by nonlinear coherent CC vibration in aqueous β-carotene. Moreover, overtone and combinations of it were also observed and their intensities were 10%-20% of those of their fundamentals when β-carotene was dissolved in non-polar solvents, respectively.

关键词： Raman scattering cross section Electron-phonon coupling Coherent vibration

Role of immune cell interactions in alcohol-associated liver diseases

在线全文

学校读者我要写书评

暂无评论

liver Research 2024年第2期8卷 72-82页

作者： Xianda Wang Juan Wang Haodong Peng li zuo Hua Wang Innovation and Entrepreneurship Laboratory for College Students Anhui Medical UniversityHefeiAnhuiChina Laboratory of Molecular Biology Department of BiochemistrySchool of Basic Medical SciencesAnhui Medical UniversityHefeiAnhuiChina The First School of Clinical Medicine Anhui Medical UniversityHefeiAnhuiChina Inflammation and Immune-Mediated Diseases Laboratory of Anhui Province Anhui Medical UniversityHefeiAnhuiChina Department of Oncology The First Affiliated Hospital of Anhui Medical UniversityHefeiAnhuiChina

Research on inflammatory response,liver injury,and immune regulation has demonstrated that the intricate interactions among immune cells constitute a critical regulatory *** consumption alters the liver microenvironment,triggering inflammation and immune *** the inhibitory,cooperative,and synergistic effects among lymphocytes and myeloid cells may reveal the core mechanisms of alcohol-associated liver disease(ALD)pathogenesis and identify promising therapeutic *** review seeks to elucidate the intricate and multifaceted interactions among immune cells,encompassing both direct cellular interactions and the secretion of various effector *** is essential to underscore that these interactions have broader and more complex roles in ALD than the activities of individual immune cell *** interactions play a crucial role in mutually regulating one another,thereby preserving the homeostasis of the inflammatory and immune response in the liver *** these immune cell interactions is anticipated to offer a novel approach to the prevention and treatment of ALD.

关键词： Immune cell Cell interactions Inflammation Alcohol-associated liver disease(ALD)

Optical and Electric and Structural Properties of Ti_(1-x)Al_(x)N Thin Films

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 1998年第7期15卷 533-534页

作者： li zuo-yi XIONG Rui YANG Xiao-fei HU zuo-qi XU Ying liN Geng-qi LU Zhi-hong Department of Solid State Electronics Huazhong University of Science and TechnologyWuhan 430074 Shanghai Institute of Metallugy Chinese Academy of SciencesShanghai 200050

A sequence of Ti_(1-x)Al_(x)N films has been prepared by rf reactive magnetron *** optical and electric properties versus aluminum content x have been *** suitable for magneto-optic protective layers have been achieved in Ti_(1-x)Al_(x) N thin films with aluminum content x>0.75.X-ray diffraction results show that Ti_(1-x)Al_(x) N thin films in this study are a bcc structure up to x=0.75,further increase in the aluminum content gives a wurtzite *** of the results show that the optical and electric properties of Ti_(1-x)Al_(x) N films might be related to the crystal structure.

关键词： structure films

Responses of river bed evolution to flow-sediment process changes after Three Gorges Project in middle Yangtze River:A case study of Yaojian reach

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Water Science and Engineering 2020年第2期13卷 124-135页

作者： li-qin zuo Yong-jun Lu Huai-xiang liu Fang-fang Ren Yuan-yuan Sun State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Nanjing Hydraulic Research InstituteNanjing 210029China Middle Changjiang River Survey Bureau of Hydrology and Water Resources Wuhan 430010China

The Three Gorges Project(TGP)has changed the flow-sediment process in the middle Yangtze *** navigation purposes,there is an urgent need to study the changes of the river regime over a long-term period and the shoal-channel evolution over different seasons since the completion of the *** on analysis of the measured data and the results of a two-dimensional mathematical model,the changes of the river regime and river bed evolution in the Yaojian reach downstream of the TGP were *** show that a high sediment transport flux helps to keep the main flow in the North Branch,while a low sediment transport flux helps to keep the main flow in the South ***,the main branch will not change in the near future because of the low sediment transport *** this study,the flow-sediment process adjusted by the TGP was restored to the conditions before the TGP,and the river bed evolution under the adjusted and non-adjusted flow-sediment conditions was *** the completion of the TGP,the reservoir storage accelerated the flood recession process and decreased the erosion by 11.9%under the flow-sediment conditions in 2010,and the deposition in the flood season decreased by 56.4%.

关键词： River regime River bed evolution Flow-sediment process Three Gorges Project Yaojian reach Middle Yangtze River Navigation channel

Propofol vs midazolam plus fentanyl for upper gastrointestinal endomicroscopy:A randomized trial

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2012年第15期18卷 1814-1821页

作者： Xiu-li zuo Zhen li Xiao-Ping liu Chang-Qing li Rui Ji Peng Wang Cheng-Jun Zhou Han liu Yan-Qing li Department of Gastroenterology QiluHospitall Shandong University Jinan 250012 Shandong Province China Department of Anesthesiology Qilu Hospital Shandong University Jinan 250012 Shandong Province China Department of Pathology the Second Affiliated Hospital Shandong University Jinan 250033 Shandong Province China

AIM:To compare the endomicroscopic image quality of integrated confocal laser endomicroscopy(iCLE)and sedation efficacy of propofolvs midazolam plus fentanyl(M/F).METHODS:Consecutive outpatients undergoing iCLE were prospectively recruited and randomized to the propofol group(P group)or M/F *** patient,performing endoscopist and endoscopic assistant were blinded to the *** quality of endomicro-scopic images and anesthetic efficacy outcomes were blindly evaluated after iCLE ***:There were significantly more good quality endomicroscopic images in the propofol group than in the M/F group(72.75%vs 52.89%,Plity endomicroscopic images,and may result in improved procedural efficacy and diagnostic accuracy during iCLE examination.

关键词： Confocal laser endomicroscopy Conscious sedation Randomized trial Sensitivity and specificity Image quality