检索结果-南通市图书馆

Effect of exogenous spastin combined with polyethylene glycol on sciatic nerve injury

Neural Regeneration Research 2019年第7期14卷 1271-1279页

作者： Yao-Fa Lin Zheng Xie Jun Zhou Hui-Hao Chen wan-wan shao Hao-Dong Lin Department of Orthopedics Changzheng Hospitalthe Second Military Medical University Department of Orthopedics the Second People's Hospital of Karamay

Polyethylene glycol can connect the distal and proximal ends of an injured nerve at the cellular level through axonal fusion to avoid Wallerian degeneration of the injured distal nerve and promote peripheral nerve ***,this method can only prevent Wallerian degeneration in 10% of axons because the cytoskeleton is not repaired in a timely *** of the cytoskeletal trunk and microtubule network has been suggested to be the key for improving the efficiency of axonal *** a microtubule-severing protein,spastin has been used to enhance cytoskeletal ***,we hypothesized that spastin combined with polyethylene glycol can more effectively promote peripheral nerve regeneration.A total of 120 male Sprague-Dawley rats were randomly divided into sham,suture,polyethylene glycol,and polyethylene glycol + spastin *** suture group rats,only traditional nerve anastomosis of the end-to-end suture was performed after transection of the sciatic *** polyethylene glycol and polyethylene glycol + spastin groups,50 μL of polyethylene glycol or 25 μL of polyethylene glycol + 25 μL of spastin,respectively,were injected immediately under the epineurium of the distal *** fiber regeneration distance,which was used to assess early nerve regeneration at 1 week after surgery,was shortest in the suture group,followed by polyethylene glycol group and greatest in the polyethylene glycol + spastin *** assessment of motor function recovery in rats showed that limb function was restored in polyethylene glycol and polyethylene glycol + spastin groups at 8 weeks after *** 1,2,4 and 8 weeks after surgery,sciatic functional index values and percentages of gastrocnemius muscle wet weight were highest in the sham group,followed by polyethylene glycol + spastin and polyethylene glycol groups,and lowest in the suture *** staining was utilized to assess the morphology of muscle *** change

关键词： nerve regeneration peripheral nerves Wallerian degeneration polyethylene glycol axonal fusion spastin peripheral nerve injuries Masson staining microtubule neural regeneration

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Review of non-reactive CaO-Al2O3-based mold fluxes for casting high-aluminum steel

引用

Journal of Iron and Steel Research International 2019年第4期26卷 336-344页

作者： Lei Zhang wan-lin wang Han-qing shao School of Metallurgy and Environment Central South UniversityChangsha 410083HunanChina

Advanced high-strength steels (AHSSs) have been gradually applied to modern auto industry, as they have the advantages of improving the steel strength and lightening the car weight, which not only ensures the safety but also saves the energy. However, the high-aluminum (Al) content in AHSSs may react with SiO2 in conventional CaO-SiO2-based mold flux during the process of continuous casting, which leads to the deterioration of the mold flux properties and a poor slab quality. Then, the non-reactive CaO-Al2O3-based mold flux was proposed and has been developing for the casting process of high-Al steels, but there are some problems of low consumption and insufficient lubrication that need to be solved. Thus, previous researches on the effect of each component on the properties of CaO-Al2O3-based mold flux were systematically summarized, and the situation of plant trials on CaO-Al2O3-based mold flux was evaluated. The results indicated that the proposed CaO-Al2O3-based mold fluxes could avoid the slag-metal reaction problems;however, the problems of lubri-cation, crystallization and heat transfer issues still exist. Therefore, tremendous works still need to be conducted for the development of new generation of CaO-Al2O3-based mold flux system. The review was performed aiming to provide a technical guidance for designing and optimizing CaO-Al2O3-based mold flux system that meets the demand of the continuous casting process of high-Al steels.

关键词： High-Al steel CaO-Al2O3-based mold flux Thermophysical property Lubrication Crystallization

来源：

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

Polaronic Band Structure of Holstein Model

引用

Chinese Physics Letters 2000年第2期17卷 129-131页

作者： wan shao-Long wanG Ke-Lin CCAST(World Laboratory) P.O.Box 8730Beijing 100080 Department of Astronomy and Applied Physics University of Science and Technology of ChinaHefei 230026

A new concise approach is presented for analytic study of the properties of the Holstein model. New analytic results for the polaronic band structure and phonon distribution, of the Holstein molecular crystal model, are given in one dimension. And all analytic results given are in accordance with the known numerical research results.

关键词： dimension. model analytic

来源：

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

A Finite Temperature Phase Diagram in Rotating Bosonic Optical Lattices

引用

Chinese Physics Letters 2011年第6期28卷 36-39页

作者： HUANG Bei-Bing wan shao-Long Department of Experiment Teaching Yancheng Institute of TechnologyYancheng 224051 Institute for Theoretical Physics and Department of Modern Physics University of Science and Technology of ChinaHefei 230026

A finite temperature phase diagram of the rotating Bose–Hubbard model,including the crossover between Mott insulator and the normal state,is derived on the frame of the Gutzwiller mean-field *** addition,we calculate... 详细信息

关键词： transition theory phase

来源：

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

Effect of precipitates on high-temperature strength and irradiation behavior of vanadium-based alloys

引用

Journal of Iron and Steel Research International 2018年第12期25卷 1270-1277页

作者： shao-ning Jiang Li-qun Xu Fa-rong wan School of Mechanical and Automotive Engineering Qilu University of Technology (Shandong Academy of Science) Jinan 250353ShandongChina School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China

The formation of precipitates and their effect on mechanical properties and irradiation damage in V-4CraTi alloys have been investigated using transmission electron microscope,high-temperature tensile tests and high-voltage electron microscope (HVEM).V-4Cr-4Ti alloys were aged for 20-40 h at 873 K,and extremely fine precipitates were produced during the aging process,which coarsened with aging *** results of high-temperature (773,873 and 973 K)tensile tests showed an increase in strength with increasing aging time (i.e:,increasing size of precipitates)while a decrease in the uniform *** was evidence that presence of precipitates strengthened V-4Cr-4Ti *** situ HVEM observations showed that the precipitates restricted the growth rate of dislocation loops induced during electron irradiation at 773 *** interactions between precipitates and irradiation-induced dislocation loops were *** presence of particles alleviated the increase in irradiation hardening up to an irradiation dose of 3.42 dpa (displacement per atom).The precipitates shrank in size during electron irradiation,which was due to the dissolution of constituent atoms of the precipitates into the alloy matrix.

关键词： Aging Precipitate strengthening Electron irradiation Irradiation defect Dislocation loop

来源：

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

Glacier Variation in Response to Climate Change in Chinese Tianshan Mountains from 1989 to 2012

引用

Journal of Mountain Science 2015年第5期12卷 1189-1202页

作者： HE Yi YANG Tai-bao JI Qin CHEN Jie ZHAO Gang shao wan-wan College of Earth and Environmental Sciences Lanzhou University

Based on the 1990, 2000 and 2011 Landsat TM/ETM+ remote sensing data, glacier information of three periods in the Chinese Tianshan Mountains were extracted by using ratio threshold method(TM3/TM5) and visual interpretation, combined with digital processing of satellite images and analysis in GIS. The climate data in the surrounding area were analyzed by using linear regression, Mann-Kendall abrupt test, and Morlet wavelet analysis. Study results showed that: over the 23 years investigation, the glacier areas have markedly decreased. In the last 12 years(2000 to 2011), the rate of retreat has begun to accelerate. The most dramatic glacier shrinkage occurred in the central region, the lowest in the eastern region. The mean summer temperature and warm precipitation in Chinese Tianshan Mountains had an increasing trend, with rates of 0.22°C /10 a and 5.1mm/10 a from 1960 to 2011, respectively. Mean summer temperature have experienced a strong increase in 1998. The analysis of the results showed that the rise of mean summer temperature was the main factor that contributed to glacier shrinkage. Regional differences of glacier area changes were investigated by analyzing glacier behavior in five study sub-regions; regional differences are related to local climate, to the relative proportion of glaciers in different size classes, altitudinal and aspect distribution of glaciated areas. In addition, the lag theory indicated that glaciers may accelerate the retreat in the next decade, considering climate trends recognized for the period 2000-2011.

关键词： Climate variation Glacier Remotesensing Tianshan

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Characteristics of the stabilized/solidified municipal solid wastes incineration fly ash and the leaching behavior of Cr and Pb

引用

Frontiers of Environmental Science & Engineering 2016年第1期10卷 192-200页

作者： Yan shao Haobo HOU Guangxing wanG Sha wan Min ZHOU School of Resource and Environment Science Wuhan University Wuhan 430072 China GNSS Research Center Wuhan University Wuhan 430072 China

Fly ash is a hazardous byproduct of municipal solid wastes incineration （MSWI）. An alkali activated blast fumace slag-based cementifious material was used to stabilize/solidify the fly ash at experimental level. The characteristics of the stabilized/solidified fly ash, including metal leachability, mineralogical characteristics and the distributions of metals in matrices, were tested by toxic characteristic leaching procedure （TCLP）, X-ray diffrac- tion （XRD） and scanning electron microscopy-energy dispersive spectrometer （SEM-EDS） respectively. Contin- uous acid extraction was utilized to extract metal ions and characterize their leaching behavior. The stabilization/ solidification procedure for MSWI fly ash demonstrates a strong fixing capacity for the metals by the formation of C- S-H phase, hydrated calcium aluminosilicate and ettringite. The stabilized/solidified fly ash shows a dense and homogeneous microstructure. Cr is mainly solidified in hydrated calcium aluminosilicate, C-S-H and ettringite phase through physical encapsulation, precipitation, adsorption or substitution mechanisms, and Pb is mainly solidified in C-S-H phase and absorbed in the Si-O structure.

关键词： municipal solid waste incineration (MSWI)fly ash blast furnace slag leaching behavior Cr Pb

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Novel Route to Synthesize Nano-crystalline Ba_(0.5)Sr_(0.5)Co_(0.8)Fe_(0.2)O(3-δ) Perovskite Oxide at High Temperature

引用

Chinese Chemical Letters 2006年第10期17卷 1353-1356页

作者： Wei ZHOU Zong Ping shao wan Qin JIN Key Laboratory of Materials-Oriented Chemical Engineering of Ministry of Education of China College of Chemistry and Chemical Engineering Nanjing University of Technology Nanjing 210009

It is normally difficult to prepare nano-sized Ba0.5Sr0.5Co0.8Fe0.2O3-δ（BSCF） oxide at high temperature due to its high surface activity. The complexing process, which has successfully applied in the synthesis of nano Sm0.15Ce0.85I1.925 with crystallite size down to 5 nml, just resulted in a coarse BSCF with crystaUite size of 41.9 nm at 900℃. We applied a novel process by simply modifying the solid precursor from the complexing process with concentrated nitric acid treatment. The obtained BSCF powder had a crystaUite size of -25 nm even calcined at 1000℃. The small crystaUite size is extremely promising to enhance the electrochemical performance of cathode for solid oxide fuel cell dramatically.

关键词： Nano-crystallite perovskite solid oxide fuel cells.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Ground State Mass Spectrum for Scalar Diquarks with Bethe-Salpeter Equation

引用

Communications in Theoretical Physics 2007年第2期47卷 287-292页

作者： wanG Zhi-Gang wan shao-Long YANG Wei-Min Department of Physics North China Electric Power University Baoding 071003 China Department of Modern Physics University of Science and Technology of China Hefei 230026 China

In this article, we study the structures of the pseudoscalar mesons π, K and the scalar diquarks U^a, D^a, Sa in the framework of the coupled rainbow Schwinger-Dyson equation and ladder Bethe-Salpeter equation with the confining effective potential. The u, d, s quarks have small current masses, and the renormalization is very large, the mass poles in the timelike region are absent which implements confinement naturally. The Bethe-Salpeter wavefunctions of the pseudoscalar mesons π, K, and the scalar diquarks U^a, D^a, S^a have the same type （Gaussian type） momentum dependence, center around zero momentum and extend to the energy scale about q^2 = 1 GeV^2, which happens to be the energy scale for the chiral symmetry breaking, the strong interactions in the infrargd region result in bound （or quasl-bound） states. The numerical results for the masses and decay constants of the π and K mesons can reproduce the experimental values, and the ground state masses of the scalar diquarks U^a, D^a, S^a are consistent with the existing theoretical calculations. We suggest a new Lagrangian which may explain the uncertainty of the masses of the scalar diauarks.

关键词： Schwinger-Dyson equation Bethe-Salpeter equation diquark confinement

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Aerodynamic modeling and stability analysis of a high-speed train under strong rain and crosswind conditions

引用

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2011年第12期12卷 964-970页

作者： Xue-ming shao Jun wan Da-wei CHEN Hong-bing XIONG Department of Mechanics Zhejiang University Hangzhou 310027 China National Engineering Laborat ory for System Integration of High-Speed Train （South） CSR Qingdao Sifang Co. Ltd. Qingdao 266111 China

With the development of high-speed train,it is considerably concerned about the aerodynamic characteristics and operation safety issues of the high-speed train under extreme weather *** aerodynamic performance of a high-speed train under heavy rain and strong crosswind conditions are modeled using the Eulerian two-phase model in this *** impact of heavy rainfall on train aerodynamics is investigated,coupling heavy rain and a strong *** show that the lift force,side force,and rolling moment of the train increase significantly with wind speed up to 40 m/s under a rainfall rate of 60 mm/*** considering the rain and wind *** increases of the lift force,side force,and rolling moment may deteriorate the train operating safety and cause the train to overturn.A quasi-static stability analysis based on the moment balance is used to determine the limit safety speed of a train under different rain and wind *** results can provide a frame of reference for the train safe operation under strong rain and crosswind conditions.

关键词： High-speed train Aerodynamic characteristics Multiphase flow Rain Crosswind Overturning

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：