检索结果-南通市图书馆

Immunohistochemical investigation of CEA, α1- ACT, α1-AT, LF and TF in Warthin＇s tumor

在线全文

学校读者我要写书评

暂无评论

中国口腔颌面外科杂志 2008年第B5期6卷 137-138页

作者： Dong Sheng yu Wei zhao hong Zhang Huang Chao Bin Pan Jin Song Hou Department of Oral Maxillofacial Surgery Hospital ofStomatology SUN Yat-sen University Guangzhou 510055 China

Unraveling the significance of cobalt on transformation kinetics,crystallography and impact toughness in high-strength steels

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

International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 380-390页

作者： Yishuang yu Jingxiao zhao Xuelin Wang Hui Guo Zhenjia Xie Chengjia Shang Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China

This work reveals the significant effects of cobalt(Co)on the microstructure and impact toughness of as-quenched highstrength steels by experimental characterizations and thermo-kinetic *** results show that the Co-bearing steel exhibits finer blocks and a lower ductile-brittle transition temperature than the steel without ***,the Co-bearing steel reveals higher transformation rates at the intermediate stage with bainite volume fraction ranging from around 0.1 to *** improved impact toughness of the Co-bearing steel results from the higher dense block boundaries dominated by the V1/V2 variant ***,the addition of Co induces a larger transformation driving force and a lower bainite start temperature(BS),thereby contributing to the refinement of blocks and the increase of the V1/V2 variant *** findings would be instructive for the composition,microstructure design,and property optimization of high-strength steels.

关键词： high-strength steel cobalt transformation kinetics crystallography impact toughness

均匀化工艺对3104铝合金中弥散相分布的影响

在线全文

学校读者我要写书评

暂无评论

材料热处理学报 2017年第3期38卷 54-60页

作者：鲁法云张军利于宏赵凤赵巍山东南山铝业股份有限公司国家铝合金压力加工工程技术研究中心山东龙口265713 北京南山航空材料研究院北京100048

利用光学显微镜和电导率测试仪对3104铝合金不同均匀化条件下的弥散相析出情况进行研究。结果表明,3104铝合金铸锭中只有存在少量Al_(12)Mn_3Si弥散相,均匀化后基体中析出大量Al_(12)Mn_3Si弥散相,呈点状或短棒状,合金电导率升高。随时... 详细信息

利用光学显微镜和电导率测试仪对3104铝合金不同均匀化条件下的弥散相析出情况进行研究。结果表明,3104铝合金铸锭中只有存在少量Al_(12)Mn_3Si弥散相,均匀化后基体中析出大量Al_(12)Mn_3Si弥散相,呈点状或短棒状,合金电导率升高。随时均匀化温度升高,弥散相发生粗化和回溶,密度减小,尺寸增大,并且合金电导率逐渐降低。因此,经600℃×10 h均匀化弥散相的密度最低,尺寸最大,为400~500 nm。均匀化升温降温速率对弥散相析出有影响,均匀化升温速率减慢,弥散相数量增加,尺寸减小;均匀化冷却速率增加,数量减少,尺寸略有减小;而样品重新在500℃保温2 h后,弥散相数量明显增加,电导率升高,但相互之间差别不大。因此,3104铝合金铸锭在较高温度下(580℃以上)保温较长时间,有利于获得合理的弥散相粒子分布。

关键词： 3104铝合金均匀化 Al12Mn3Si弥散相再结晶

在线全文

学校读者我要写书评

暂无评论

肺癌相关肿瘤标志物的临床价值及研究进展

中国实用内科杂志 2017年第2期37卷 166-169页

作者：雷宇赵洪文中国医科大学附属第一医院呼吸内科辽宁沈阳110001

肺癌是一项重要的全球公共卫生问题。早期肺癌与肺部良性疾病常有相似症状，而部分中晚期肺癌患者又由于各种原因不能明确诊断。目前运用的检测手段包括无创检查（如X线、CT等）和有创检查（如纤维支气管镜、超声支气管镜、胸腔镜或CT... 详细信息

肺癌是一项重要的全球公共卫生问题。早期肺癌与肺部良性疾病常有相似症状，而部分中晚期肺癌患者又由于各种原因不能明确诊断。目前运用的检测手段包括无创检查（如X线、CT等）和有创检查（如纤维支气管镜、超声支气管镜、胸腔镜或CT定位下穿刺活检等），因缺乏依从性和普及运用的可能性、特异度高而敏感度低等原因，确诊时肺癌患者80％已属晚期，5年生存率低于15％，但早期诊断的患者，5年生存率高达80％.

关键词：肺癌肿瘤标志物

Effect of Zn addition on microstructure and mechanical properties of cast Mg-Gd-Y-Zr alloys

在线全文

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of China 2019年第4期29卷 722-734页

作者： Zhi-bing DING yu-hong zhao Ruo-peng LU Mei-ni yuAN Zhi-jun WANG Hui-jun LI Hua HOU College of Materials Science and Engineering North University of ChinaTaiyuan 030051China College of Mechatronic Engineering North University of ChinaTaiyuan 030051China

The effects of Zn addition on the microstructure and mechanical properties of Mg.10Gd.3Y.0.6Zr(wt.%)alloys in the as-cast,solution-treated,and peak-aged conditions were *** results reveal that the microstructure of the as-cast alloy without Zn consists ofα-Mg and Mg24(Gd,Y)5 phases,and the alloy with 0.5 wt.%Zn consists ofα-Mg,(Mg,Zn)3(Gd,Y)and Mg24(Gd,Y,Zn)5 *** the addition of Zn increasing to 1 wt.%,the Mg24(Gd,Y,Zn)5 phase disappears and some needle-like stacking faults distribute along the grain ***,the 18R long-period stacking ordered(LPSO)phase is observed in the as-cast alloy with 2 wt.%*** solution treatment,the Mg24(Gd,Y)5 and Mg24(Gd,Y,Zn)5 eutectic phases are completely dissolved,and the(Mg,Zn)3(Gd,Y)phase,needle-like stacking faults and 18R LPSO phase all transform into 14H LPSO *** the suitable volume fraction of 14H LPSO phases and the fine ellipsoidal-shapedβ′phases make the peak-aged alloy with 0.5 wt.%Zn exhibit excellent comprehensive mechanical properties and the UTS,YS and elongation are 338 MPa,201 MPa and 6.8%,respectively.

关键词： Mg alloy heat treatment microstructure mechanical property LPSO phase

Effect of Dendroflorin on the Growth and Cell Cycles in the Senescent Mrc-5 Cells

在线全文

学校读者我要写书评

暂无评论

Effect of Dendroflorin on the Growth and Cell Cycles in the ...

Effect of applied pressure on microstructure and mechanical properties of Mg-Zn-Y quasicrystal-reinforced AZ91D magnesium matrix composites prepared by squeeze casting

The 8th Asia/Oceania Regional Congress of Gerontology and Geriatrics

作者： Jinghua Jin Hu Zhu yu Liang hong Xie zhao Wang School of Medicine Tsinghua University

＜正＞Aim:To investigate the anti-senescence effect of dendroflorin,one potential active compound extracted from Dendrobium nobile Lindl.,on cell growth and cell cycle in human embryo lung fibroblastic MRC-5 cell line.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of China 2015年第12期25卷 3936-3943页

作者：杨玲侯华赵宇宏杨晓敏中北大学材料科学与工程学院太原030051

The Mg-Zn-Y quasicrystal-reinforced AZ91 D magnesium matrix composites were prepared by squeeze casting process. The effects of applied pressure on microstructure and mechanical properties of the composites were investigated. The results show that squeeze casting process is an effective method to refine the grain. The composites are mainly composed of α-Mg, β-Mg17Al12 and Mg3Zn6Y icosahedral quasicrystal phase（I-phase）. With the increase of applied pressure, the contents of β-Mg17Al12 phase and Mg3Zn6 Y quasicrystal particles increase, further matrix grain refinement occurs and coarse dendritic α-Mg transforms into equiaxed grain structure. The composite exhibits the maximum ultimate tensile strength and elongation of 194.3 MPa and 9.2% respectively when the applied pressure is 100 MPa, and a lot of dimples appear on the tensile fractography. Strengthening mechanisms of quasicrystal-reinforced AZ91 D magnesium matrix composites are chiefly fine-grain strengthening and quasicrystal particles strengthening.

关键词： magnesium matrix composite squeeze casting quasicrystal microstructure mechanical properties

Operating Analysis of the Closed Supply Chain of Green Agricultural Products Based on Logistics Center

在线全文

学校读者我要写书评

暂无评论

Asian Agricultural Research 2010年第3期2卷 44-50页

作者： WANG Duo-hong,LI yu,zhao hong-xia,ZHANG Jiang-quan Traffic transportation department,Southwest Jiaotong University-E’mei,E’mei 614202,China

This thesis gives the overview of concept and constitution of the closed supply chain of green agricultural products based on logistics center,and the necessity of regarding logistics center as core ***,it analyzes the function of logistics center of agricultural products,namely functions of exchange,collection,distribution,storage and *** also poses the prerequisites of logistics *** logistics center of agricultural products must have stable profit expectancy,prominent scale,strong appealing power,capacity of bearing market risk and basic thoughts of supply chain *** functional design of the closed supply chain of green agricultural products has been discussed in 5 aspects,namely logistics center,production base,providers of means of production,retailer and *** operating thoughts of the closed supply chain of green agricultural products based on logistics center are put forward on the basis of the research of operating objective and service target of supply chain as follows:first,based on local principal agricultural products,the logistics center mainly distributes the massed agricultural products;second,it is necessary to choose appropriate strategic cooperative partners to sign contract;third,the operating procedure of supply chain entails bringing in professional managerial talents of supply chain;finally,the relationships of supply chain should be maintained.

关键词： Closed supply chain Operating mode Logistics cente

Preparation of semi-solid ZL101 aluminum alloy slurry by serpentine channel

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

Transactions of Nonferrous Metals Society of China 2016年第7期26卷 1820-1825页

作者：程书建赵宇宏侯华靳玉春郭晓晓中北大学材料科学与工程学院太原030051

Semi-solid slurry of ZL101 aluminum alloy was prepared using serpentine channel. The influences of the pouring temperature, the number of curves and the serpentine channel temperature on the microstructure of semi-solid ZL101 aluminum alloy were investigated. The results show that, satisfied semi-solid slurry of ZL101 aluminum alloy was prepared with pouring at 630-680℃. The morphology of primaryα（Al） grains transforms from rosette to spheroid with the decrease of pouring temperature. At the same pouring temperature, increasing the number of curves can improve the morphology of primaryα（Al） grains and decrease the grain size. Qualified slurry can be attained with lowering the pouring temperature when the serpentine channel temperature is higher. The alloy melt has the effect of“self-stirring”in the serpentine channel, which can make the primary nuclei gradually evolve into spherical and near-spherical grains.

关键词： ZL101 aluminum alloy semi-solid slurry serpentine channel