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Triton　X－100对紫膜蛋白的效应

生物物理学报 1996年第1期12卷 153-156页

作者：生文君张志杰董宝中杨恒林胡坤生王敖金中国科学院高能物理研究所中国科学院生物物理研究所

本文采用同步辐射小角Ｘ射线散射方法研究了用非离子表面活性剂ＴｒｉｔｏｎＸ—１００处理后的嗜盐菌紫膜及其视紫红质蛋白结构的变化。实验结果表明，用不同浓度的ＴｒｉｔｏｎＸ—１００处理紫膜碎片时，紫膜及其蛋白所处的状态有着... 详细信息

本文采用同步辐射小角Ｘ射线散射方法研究了用非离子表面活性剂ＴｒｉｔｏｎＸ—１００处理后的嗜盐菌紫膜及其视紫红质蛋白结构的变化。实验结果表明，用不同浓度的ＴｒｉｔｏｎＸ—１００处理紫膜碎片时，紫膜及其蛋白所处的状态有着很大变化。

关键词：紫膜生物膜蛋白表面活性剂

A new way of transformation from a-quartz to coesite

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Progress in Natural science:Materials International 2006年第10期16卷 1090-1097页

作者： SU Wenhui, LIU Shue, XU Dapeng, WANG Weiran, YAO Bin, GUO Xingyuan, LIU Zhiguo, and ZHONG Zheng ( Center for the Condensed Matter science and Technology, Harbin institute of Technology, Harbin 150001,{2. Center for Rare-Earth Solid State physics, Jilin University, Changchun 13002.,{2. International Center for Materials physics, chinese A-cademy of sciences, Shenyang 110015,{2. Center for Condensed Matter and radiation physics,{2. Center of Advanced science and Technology (World laboratory), beijing 100080,{2. Department of physics, University of Windsor, Windsor, ON N9B 3P4, Canada) Center for Rare-Earth Solid State physics Jilin University Changchun 130023 China International Center for Materials physics Chinese Academy of Sciences Shenyang 110015 China Center for Condensed Matter and radiation physics China Center of Advanced Science and Technology (World Laboratory) Beijing 100080 China Center for the Condensed Matter science and Technology Harbin Institute of Technology Harbin 150001 China Department of physics University of Windsor Windsor ON N9B 3P4 Canada

A laboratory method combining the high-{2. mechanical ball milling and high static pressure has been suggested for modelling synthesis of coesite in the Earth's crust. A window of milling time, a mechanical collision-induced intermediate phase ofα-quartz and its condition of easily crystallizing into coesite under the condition of 3.0 GPa, 92. K, science research and implied the other possible mechanism of coesite formation in the Earth's crust.

关键词： quartz-coesite high-energy mechanical ball milling high state pressure Raman spectrum metastable phase sub-duction-exhumation of plate.

Structural insights into a dual-specificity histone demethylase ceKDM7A from Caenorhabditis elegans

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Structural insights into a dual-specificity histone demethyl...

ESTIMATION OF THE GRAVITATIONAL radiation (GR) FROM THE PULSAR PSR 1937+2.4

第十七届国际生物物理大会;第十二届中国生物物理大会

作者： Ying Yang~(1,2,3),Lu Zhou~5,Hanqin Lin~6,Degui Chen~6,Yanhui Xu~(1,2,3),Lulu Hu~(2,3),Ping Wang~(2,3),Haifeng Hou~4,Yan Lin~(2,3),Yi Liu~(2,3) 1.Cancer institute,Shanghai Cancer Center,Fudan University Department of Oncology,Shanghai Medical College,Fudan University,Shanghai,china 2.School of Life sciences,Fudan University,220 Han-Dan Road,Shanghai,china 3.institutes of Biomedical sciences,Fudan University,Shanghai,china 4.beijing synchrotron radiation Facility,institute of high energy physics,chinese academy of sciences, beijing,china 5.School of Pharmacy,Fudan Univercity,South Chemistry Building,Room 315,826 Zhangheng Road, Shanghai,china 6.State Key laboratory of Molecular Biology,Shanghai institutes for Biological sciences,chinese academy of sciences,Shanghai,china

Histone lysine nethylation can be removed by JmjC domain-containing proteins in a sequence- and methylation-state-specific ***,how substrate specificity is determined and how the enzymes are regulated were largely ***... 详细信息

关键词： histone methylation demethylase PHD Jmjc

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chinese science Bulletin 1985年第1期30卷 29-32页

作者：秦荣先毛东宁 institute of high {2. physics Academia sinica Beijing

A pulsar, PSR 1937+2.4, with rotational frequency of 642.Hz was newly discovered by Arecibo Observator in Puerto Rico in November, 1982. It has the fastest rotational frequency among all the found pulsars. The discovery of the pulsar shocked the astrophysical world, and attracted a number of gravitational wave (GW) researchers. Because this pulsar radiates GW at a frequency of 12.4 Hz, it is expected that the Weber-type antenna, L, the sound velocity V_s and the frequency of the detected GWv, have the relationship l-V_a/2.. The antenna for this pulsar is therefore required to have a length of 195 cm. If the GW radiation is strong enough, under the realizable conditions of great mass antenna and low-temperature ambient, using the method of

关键词： antenna Weber gravitational fastest enough rotational ambient length radius gravity

Discovery of a high confidence soft lag from an X-ray flare of Markarian 42.

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science china({2.,Mechanics & Astronomy) 2010年第S1期53卷 224-227页

作者： ZHANG YouHong1,HOU ZhengTian2.SHAO Li3 & ZHANG Peng1 1 Department of physics and Tsinghua Center for Astrophysics(THCA),Tsinghua University,{2. 100084,china 2.Group of Mathematics and physics,Shangqiu Medical College,Shangqiu 476100,china 3 Max-Planck-Institut für extraterrestrische Physik,Postfach 1312.Garching 85741,Germany 1. Department of physics and Tsinghua Center for Astrophysics (THCA) Tsinghua University Beijing 100084 China 2. Group of Mathematics and physics Shangqiu Medical College Shangqiu 476100 China 3. Max-Planck-Institut für extraterrestrische Physik Postfach 1312 Garching 85741 Germany

We present the X-ray variability properties of the X-ray and TeV bright blazar Mrk 42. with a-60 ks long XMM-Newton observation performed on November 9-10,*** source experienced a pronounced flare,of which the inter-band time lags were determined with a very high confidence *** soft(0.6-0.8 keV) X-ray variations lagged the hard(4-10 keV) ones by 1.09+0.11-0.12.ks,and the soft lag increases with increasing difference in the photon *** energy-dependent soft lags can be well fitted with the difference of the energy-dependent cooling timescales of the relativistic electron distribution responsible for the observed X-ray emission,which constrains the magnetic field strength and Doppler factor of the emitting region to be Bδ 1/3-1.78 Gauss.

关键词： BL Lacertae objects:individual:Mrk-42. galaxies:active radiation mechanisms:non-thermal X-rays:galaxies

Pressure-Induced Phase Transition of Nanocrystalline Iron Sulfide （FeS） coated by Polyvingl alcohol （PVA）

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Pressure-Induced Phase Transition of Nanocrystalline Iron Su...

同步辐射X荧光微探针扫描分析氟碳铈矿物中的稀土元素

18th International Conference on high Pressure science and Technology

作者： Wei Gao Qiliang Cui Shihai Kan Yuewu Pan Xin Wang Guangtian Zou Jing Liu National Lab of SuperhardMaterials Jilin University Changchun 13002. P.R.china BSRF institute of {2. energy physics Academia Sinica beijing 100039 P.R.china

＜正＞ Nanocrystalline Iron Sulfide （FeS） coated with Polyvingl alcohol （PVA） in size ranging from several to several tens of nanometers has been prepared by the chemical precipitation synthesis method. The phase transition of FeS have been investigated by using in situ high pressure diffraction with synchrotron {2. at pressure up to 42.5Gpa. Eleven X-ray reflection of high-pressure FeS were recorded;however, the crystal structure is unknown. According to the high pressure X-ray diffraction results, the most interplanar spacings of the diffraction line are broadened and weakened, the diffraction line d=0.3863nm is disappeared on 6.5GPa and d=0.3154nm is appeared on ***. At pressure 6.5GPa and ***, the two previous phase transitions were observed. At atmospheric pressure, the structure of bulk FeS is similar to the hexagonal structure of NiAs-typt. From the X-ray power diffraction data, our samples of nanocrystalline FeS consisted entirely of troilite. Taylor＆Mao[1] reported the experiments at 12.±40kbar and 2.°c, and 50±2.kbar and 12.±30°c revealed the presence of a new high-pressure form of FeS. Compared the subsequent of X-ray diffraction, we found the atmospheric pressure structure of nanocrystalline FeS is the same as the high pressure structure of Taylor＆Mao[1]s bulk FeS. It is obvious that nanocrystalline FeS is different from bulk FeS. Especially, from figure 2. we can see clearly that the transition pressure is lower than that of Taylor ＆ Mao[1] and King[3] el. reported.

关键词： NanoFeS PVA DAC high pressure energy dispersive X-ray diffraction

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中国稀土学报 1996年第3期14卷 280-283页

作者：安庆骧王锐兵邓赛文潘巨祥吴应荣吴澄宇国家地质实验测试中心中国科学院高能物理研究所中国地质科学院矿床研究所北京科技大学化学系

北京正负电子对撞机（ＢＥＰＣ）国家实验室的增频（或扭摆）磁铁（Ｗｉｇｇｌｅｒ）光源（储存环电子能量２．２ＧｅＶ；最大束流强度７５ｍＡ）提供的同步辐射（ＳＲ）白光，激发ＬＲＥＥ　Ｋ－系线，用ＳＲＸＲＦＭ扫描分析氟碳铈矿... 详细信息

北京正负电子对撞机（ＢＥＰＣ）国家实验室的增频（或扭摆）磁铁（Ｗｉｇｇｌｅｒ）光源（储存环电子能量２．２ＧｅＶ；最大束流强度７５ｍＡ）提供的同步辐射（ＳＲ）白光，激发ＬＲＥＥ　Ｋ－系线，用ＳＲＸＲＦＭ扫描分析氟碳铈矿物中的轻稀土元素（Ｌａ、Ｃｅ、Ｐｒ、Ｎｄ、Ｓｍ、Ｅｕ）的分布。取同一矿区的氟碳铈矿物，粉碎至粒度＜３００目。一部分熔融，沉淀分离，转成稀土氧化物后，用ＸＲＦ法分析稀土分量。另一部分，不加任何粘结物质，压成Φ２６ｍｍ（１５ｇ）圆片作为ＳＲＸＲＦＭ扫描分析的参比样品，从而可计算样品中稀土的含量。

关键词：同步辐射X荧光稀土元素氟碳铈矿物稀土矿床

A prototype RF power source for CSNS/RCS

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science china({2.,Mechanics & Astronomy) 2011年第S2期54卷 218-221页

作者： WeiLing Huang (1) Hong Sun (1) HaiQi Zhao (2. Yu Liu (2. YanDong Li (2. ZhiGuang Qiao (2. Xiao Li (1) ChunLin Zhang (1) 1. Accelerator Center Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China2. 23rd Institute of China Aerospace Science and Industry Corporation Beijing 100854 China

A prototype RF power source has been built to supply high RF power to a ferrite-loaded cavity, which is a part of R&D of the Rapid Cycling synchrotron of{2. Spallation Neutron Source (CSNS/RCS). A direct fast RF feedback amplifier, a 4:1 impedance transformer and auto tuning grid were locally located to compensate the heavy beam loading of CSNS/RCS. Design and commissioning of the RF power source is discussed here, also with some advice on system improvement.

关键词： RF power source synchrotron beam loading RF feedback amplifier

Noise properties of multi-combination information in x-ray grating-based phase-contrast imaging

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chinese physics B 2020年第1期29卷 329-335页

作者： Wali Faiz Ji Li Kun Gao Zhao Wu Yao-Hu Lei Jian-Heng Huang Pei-Ping Zhu Key laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China National synchrotron radiation {2. University of Science and Technology of ChinaHefei 230029China institute of high {2. physics Chinese Academy of SciencesBeijing 100049China University of chinese academy of {2.s Beijing 100049China

Grating-based x-ray phase contrast imaging has attracted increasing interest in recent decades as multimodal and laboratory source usable *** efforts have been focused on establishing a new extraction method to perform practical *** this work,noise properties of multi-combination information of newly established information extraction method,so-called angular signal radiography method,are investigated to provide guidelines for targeted and specific *** results show that how multi-combination of images can be used in targeted practical applications to obtain a high-quality image in terms of signal-to-noise *** conclusions can also hold true for upcoming targeted practical applications such as biomedical imaging,non-destructive imaging,and materials {2..

关键词： grating-based phase-contrast imaging signal-to-noise ratio refraction scattering