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国家重点基础研究发展计划(2011CB911104)

作品数:5 被引量:23H指数:3
相关作者:洪春霞李怡雯王劼边风刚杨春明更多>>
相关机构:中国科学院大学中国科学院上海应用物理研究所更多>>
发文基金:国家重点基础研究发展计划国家自然科学基金国家教育部博士点基金更多>>
相关领域:理学自动化与计算机技术机械工程生物学更多>>

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A program for SAXS data processing and analysis被引量:14
2013年
A computer program for small angle X-ray scattering (SAXS) data processing and analysis named S.exe written in Intel Visual Fortran has been developed. This paper briefly introduces its main theory and function.
李志宏
关键词:SAXSPROGRAM
一种生物X射线小角散射光束线站自动换样溶液蠕动装置被引量:3
2016年
利用同步辐射X射线小角散射技术可以研究溶液中蛋白质的结构信息。但是在实验过程中,高通量的X射线易造成蛋白质的辐射损伤,发生结构变化。本文介绍了一种自动换样溶液样品蠕动装置,在实验过程中利用Hamilton的PSD/4注射泵控制样品上下运动,减小单位体积照射时间以降低X射线对蛋白质的辐射损伤。此外,通过对注射泵、准直调节台和样品/缓冲液支撑台的协调控制实现了自动换样、回样和清洗功能,提高了实验效率。在上海光源生物X射线小角散射实验站进行了实验,通过对静止模式和蠕动模式下溶菌酶的散射曲线及回旋半径的测量,表明该装置可达到很好的防辐射损伤效果,实现了预期的样品蠕动装置功能。
洪春霞周平李怡雯曾建荣边风刚王劼
A novel heating area design of temperature-jump microfluidic chip for synchrotron radiation solution X-ray scattering被引量:1
2016年
In this paper, we present a novel design scheme of temperature-jump(T-jump) area for microfluidic device.Numerical simulation and experimental research of thermal characteristics of the solution in microchannels is completed.Numerical simulation of the temperature-jump microchannel is analyzed to study the heat transfer characteristics by comparing performance of three proposed configurations.Calculation of the power requirement is discussed in the dimensional design of microheater. Temperature-sensitive fluorescent dye is applied to investigate the temperature field of microchannel heated by a designed microheater. It is found that the T-jump microfluidic device can provide rapid heating for solutions with strong convection heat transfer ability.
Yi-Wen LiFeng-Gang BianJie Wang
关键词:微流控芯片X射线散射跳变
同步辐射X射线小角散射溶液样品蠕动实验装置的研制被引量:5
2015年
研制了用于同步辐射X射线小角散射实验的溶液样品蠕动实验装置,其主要特点为可有效抑制X射线对溶液样品的辐射损伤、密封性能好、操作简便,且背景散射低、消耗样品量小,还可根据实验要求实现对样品温度的控制,进行变温原位测量。此外,通过实验对该装置的进样量和蠕动速度进行了标定,对防辐射损伤效果进行了验证。结果表明,该装置控制精度高,并可有效减小X射线在测量过程中对样品的辐射损伤。
李怡雯边风刚洪春霞赵镍杨春明王劼
Structural modeling of proteins by integrating small-angle x-ray scattering data
2015年
Elucidating the structure of large biomolecules such as multi-domain proteins or protein complexes is challenging due to their high flexibility in solution. Recently, an "integrative structural biology" approach has been proposed, which aims to determine the protein structure and characterize protein flexibility by combining complementary high- and lowresolution experimental data using computer simulations. Small-angle x-ray scattering(SAXS) is an efficient technique that can yield low-resolution structural information, including protein size and shape. Here, we review computational methods that integrate SAXS with other experimental datasets for structural modeling. Finally, we provide a case study of determination of the structure of a protein complex formed between the tandem SH3 domains in c-Cb1-associated protein and the proline-rich loop in human vinculin.
张泳辉彭俊辉张志勇
关键词:FLEXIBILITY
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