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Excellent magnetic softness in TbFe/FeCoV multilayers

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Rare Metals 2011年第4期30卷 322-326页

作者： feng Tangf LI Yongle CHEN Ziyu Department of Physics Beihang University Beijing 100191 China Key Laboratory of Micro-nano Measurement-Manipulation and Physics （Ministry of Education of China） Beihang University Beijing 100191 China

[Tb4oFe6o（x nm）/Fe49Co49V2（y nm）]N multilayers were prepared by multitarget magnetron sputtering using a rotary turn-table technique in a stop-and-go mode. The mulfilayers were investigated using X-ray diffraction, field emission scan electron microscopy and vibrating sample magnetometry. The result shows that the coercive field drops abruptly with increasing number of bilayers, and it remains generally stable when the number of bilayers is 10 or higher. An excellent magnetic softness with a coercivity of 1.0 mT is obtained for x = 5 and y = 5 after annealing at 250℃. A crystalline state is observed in FeCoV layers before and after annealing by X-ray diffraction.

关键词： rnagnetostdctive devices multiplayer films magnetic softness magnetron sputtering coercivity

Generation and Measurement of Isolated 160-Attosecond XUV Laser Pulses at 82eV

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Chinese Physics Letters 2013年第9期30卷 54-57页

作者： ZHAN Min-Jie YE Peng TENG Hao HE Xin-Kui ZHANG Wei ZHONG Shi-Yang WANG Li-feng YUN Chen-Xia WEI zhi-Yi Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190

Isolated attosecond extreme-ultraviolate(XUV)pulses are generated based on high-harmonic-generation from a neon gas cell driven by carrier-envelope phase stabilized sub-5-fs Ti:sapphire laser pulses at repetition rate of *** characterization of isolated attosecond XUV pulses is demonstrated to be 160-attosecond by attosecond streaking *** development of attosecond source and streaking spectroscopy will allow scientists to explore the electron dynamics in matter.

关键词： spectroscopy second extreme

[^188Re(CO)3L]^n新型配合物的小鼠体内生物分布

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核化学与放射化学 2008年第2期30卷 86-92页

作者：夏姣云汪勇先于俊峰尹端沚长沙理工大学化学与环境工程学院长沙410076 中国科学院上海应用物理研究所放射性药物研究中心上海201800

选择了3种三齿配体(二(2-吡啶甲基)-胺基)-乙胺(L1NH2)、(二(2-吡啶甲基)-氨基)-乙酸(L2H)和((6-胺基-N-叔丁氧基羰基-己基)-吡啶-2-甲基氨基)-乙酸(L3NH2),用于设计合成新的以fac-[188Re(CO)3]+为核心的放射性药物。3种配体在低浓度(10... 详细信息

选择了3种三齿配体(二(2-吡啶甲基)-胺基)-乙胺(L1NH2)、(二(2-吡啶甲基)-氨基)-乙酸(L2H)和((6-胺基-N-叔丁氧基羰基-己基)-吡啶-2-甲基氨基)-乙酸(L3NH2),用于设计合成新的以fac-[188Re(CO)3]+为核心的放射性药物。3种配体在低浓度(10-5mol/L)的条件下,反应时间小于60 min,标记率可达90%以上,放射化学纯度大于92%;3种标记物的体外稳定性均很高,标记后24 h内基本不分解。生物分布结果表明,配合物均能较快地从血液和多数的组织器官中清除,主要通过排泄系统代谢,并初步探讨了这3个配合物在小鼠体内的生物分布行为可能与它们的脂水分配系数lgP有关。lgP值(-0.36)高的配合物[188Re(CO)3L3NH2],24h时在各个器官中放射性保留均高于其它2个配合物,但可能不是唯一的影响因素。总的来说,3个配基是用fac-[188Re(H2O)3(CO)3]+标记的比较理想的双功能螯合剂。

关键词： ^188Re 双功能螯合剂生物分布

Male gender is associated with an increased risk of anastomotic leak in rectal cancer patients after total mesorectal excision

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Gastroenterology Report 2018年第2期6卷 137-143,I0003页

作者： Jian-ping Wang and Ping Lan Chi Zhou xian-rui Wu Xuan-hui Liu Yu-feng Chen Jia Ke Xiao-wen He Xiao-sheng He Tuo Hu Yi-feng Zou Xiao-bin Zheng Hua-shan Liu Jian-cong Hu Xiao-jian Wu Jian-ping Wang Ping Lan Department of Colorectal Surgery the Sixth Affiliated Hospital of Sun Yat-sen UniversityGuangdong Provincial Key Laboratory of Colorectal and Pelvic Floor DiseasesGuangzhouGuangdong 510065China

Background:The impact of a patient’s gender on the development of anastomotic leak(AL)in rectal cancer patients following total mesorectal excision(TME)remains *** aim of this study was to evaluate the association between patients’gender and the risk of ***:All rectal cancer patients following TME with a primary anastomosis during the study period from 2010 to 2014 were *** of the post-operative AL incidence rate between male and female patients were ***:Of all patients examined(n¼956),587(61.4%)were males and 369(38.6%)were *** patients were more likely to have a history of smoking and drinking alcohol,but less likely to have a history of abdominal surgery compared to female patients.A higher incidence rate of pre-operative bowel obstruction and larger tumor volume in male patients was observed in our *** all the patients,81(8.5%)developed post-operative *** male patients(n¼62,10.6%)suffered from AL than females(n¼19,5.1%)(P¼0.003).Multivariate logistic regression analyses confirmed the association between male gender and AL[odds ratio(OR):2.41,95%confidence interval(CI):1.37–4.23,P¼0.002].Similar results were also obtained in patients who underwent laparoscopic TME(OR:2.11,95%CI:1.15–3.89,P¼0.016).Conclusions:Male patents were found to have an increased risk for AL following TME with a primary anastomosis.A temporary protecting stoma may help to protect the anastomosis and lessen the risk for AL especially in male patients.

关键词： rectal cancer anastomotic leak gender risk factor total mesorectal excision primary anastomosis

Atomically thin InSe:A high mobility two-dimensional material

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Science China(Technological Sciences) 2017年第7期60卷 1121-1122页

作者： feng Wei ZHENG Wei GAO feng HU PingAn Key Lab of Microsystem and Microstructure Harbin Institute of TechnologyHarbin 150080China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150080China

Since silicon is limited by its physical properties,it is challenging and important to find candidate materials for high performance electronic ***-dimensional（2D）semiconductor materials have attracted dramatically ... 详细信息

关键词： challenging promise candidate dramatically outperform compatible phosphorus fabrication extremely attributed

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PX生产工艺及研究进展

现代化工 2019年第9期39卷 58-62页

作者：冯志武阳泉煤业化工集团有限责任公司

介绍了工业上芳烃联合装置生产对二甲苯的甲苯歧化工艺、C9A芳烃烷基转移工艺、二甲苯异构化工艺、近几年工业化的甲苯甲醇烷基化工艺,相比甲苯歧化工艺,甲苯甲醇烷基化工艺具有甲苯转化率高、不会副产苯的优点,不会像甲苯歧化工艺存在... 详细信息

介绍了工业上芳烃联合装置生产对二甲苯的甲苯歧化工艺、C9A芳烃烷基转移工艺、二甲苯异构化工艺、近几年工业化的甲苯甲醇烷基化工艺,相比甲苯歧化工艺,甲苯甲醇烷基化工艺具有甲苯转化率高、不会副产苯的优点,不会像甲苯歧化工艺存在甲苯异构化及多次分离的工艺过程。利用其他原料生产PX的新工艺包括合成气一步制PX工艺、苯和合成气制PX工艺、甲苯和合成气制PX工艺、烷烃转化制PX工艺,其中,合成气制二甲苯前景广阔,可在很大程度上减少PX生产的化学反应步骤,符合化学反应原子经济学原则,给合成气找到一条制取高附加值化学品的工艺途径。

关键词：对二甲苯甲苯甲基化合成气烷烃

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国家科技发展规划与中国的资源科学

自然资源学报 2005年第3期20卷 441-446页

作者：封志明中国科学院地理科学与资源研究所北京100101

国家先后编制了七次科技发展规划,资源科学研究也从最初的自然资源综合考察发展成了一门综合性交叉学科。其中以《1956—1967年科学技术发展远景规划》和《1978—1985年全国科学技术发展规划纲要》,对资源科学的形成与发展影响最大。前... 详细信息

国家先后编制了七次科技发展规划,资源科学研究也从最初的自然资源综合考察发展成了一门综合性交叉学科。其中以《1956—1967年科学技术发展远景规划》和《1978—1985年全国科学技术发展规划纲要》,对资源科学的形成与发展影响最大。前者推动了中国自然资源综合考察事业的形成与发展,后者促进了中国资源科学考察事业的发展与壮大,进而推动了资源科学的形成与发展。全文在回顾与展望国家科技发展规划与中国资源科学发展的基础上,提出了新世纪初期国家中长期科学技术发展规划有关资源科学发展的3条建议。

关键词：资源科学国家科技发展规划资源综合考察中国

Cloning and Expression Analysis of Sucrose Non-fermenting-1 Related Protein Kinase (SnRK) in Cucumis sativus L. Under Low Nitrogen Conditions

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Journal of Northeast Agricultural University(English Edition) 2013年第4期20卷 1-9页

作者： He Hong-mei Qin zhi-wei feng Zhuo Wu Tao College of Horticulture Northeast Agricultural University

The sucrose non-fermenting-1 related protein kinase（SnRK）, whose expression is induced by kinds of hyperosmotic stresses, plays a key role in improving stress resistance of plants. In order to investigate the molecular mechanism of low nitrogen resistance in cucumber, the full-length cDNA of SnRK gene was cloned in this study. The result showed that SnRK gene was 1 548 bp in length, encoded 515 amino acids, and had more than 80% homology with other crops. The protein encoded by this gene was an unstable and hydrophilic protein with no transmembrane structure and no signal peptide. Under nitrogen-free conditions and low nitrogen conditions, the expression pattern analysis of SnRK gene showed that this gene was up-regulated and its expression increased and was significantly higher than the normal level as the nitrogen concentration decreased. In addition, the expression of SnRK gene was also inhibited in the high nitrogen level and was significantly lower than the normal level. The result of this study would help us understand the molecular mechanism of low nitrogen resistance in cucumber.

关键词： cucumber SnRK gene clone expression analysis low nitrogen

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海洋立管涡激损伤分析的虚拟激励法概述

应用数学和力学 2017年第1期38卷 60-66页

作者：宗智吴锋大连理工大学船舶工程学院辽宁省深海浮动结构工程实验室工业装备结构分析国家重点实验室(大连理工大学) 高新船舶与深海开发装备协同创新中心辽宁大连116024

立管是连接海底钻井和海上平台的重要系统.涡激振动是造成立管疲劳损伤的主要因素.受海流的随机作用,立管涡激振动表现出不确定性,对这种随机振动进行快速有效地分析,对于立管的工程设计具有非常重要的意义.考虑随机激励作用,要比确定... 详细信息

立管是连接海底钻井和海上平台的重要系统.涡激振动是造成立管疲劳损伤的主要因素.受海流的随机作用,立管涡激振动表现出不确定性,对这种随机振动进行快速有效地分析,对于立管的工程设计具有非常重要的意义.考虑随机激励作用,要比确定性激励困难得多,虚拟激励法对于克服这种困难具有很好的效果.近年来,应用虚拟激励法分析立管的涡激损伤问题,取得一些成果,该文对此作一概略的叙述.

关键词：海洋立管涡激振动疲劳损伤随机振动虚拟激励法