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机械酶催化反应研究进展

分子催化（中英文） 2024年第4期38卷 375-385页

作者：程伟辛嘉英陈立新郑梦迪刘天复哈尔滨商业大学食品科学与工程重点实验室黑龙江哈尔滨150028 中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室甘肃兰州730000

机械酶学是一个全新的领域,是在机械化学的基础上提出来的,机械化学主要是把化学作用和机械作用应用到一起的学科.由于传统的化学合成方法可能会存在一些问题,比如:反应速度慢、产率低、污染环境等,而机械酶催化的提出可以改善或部分改... 详细信息

机械酶学是一个全新的领域,是在机械化学的基础上提出来的,机械化学主要是把化学作用和机械作用应用到一起的学科.由于传统的化学合成方法可能会存在一些问题,比如:反应速度慢、产率低、污染环境等,而机械酶催化的提出可以改善或部分改善这一问题.我们主要从机械化学的起源和发展、机械酶催化的反应体系分类以及在机械酶催化过程中常用的酶等方面进行介绍、总结和展望.

关键词：机械化学机械酶催化反应体系

The Homoclinic Orbit Solution for functional Equation

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Communications in Theoretical Physics 2002年第5期38卷 553-554页

作者： liu Shi-Da fu Zun-Tao liu Shi-Kuo REN Kui School of Physics Peking University Beijing 100871 China STCS Peking University Beijing 100871 China School of Physics Peking University Beijing 100871 China STCS Peking University Beijing 100871 China School of Physics Peking University Beijing 100871 China School of Physics Peking University Beijing 100871 China

In this paper, some examples, such as iterated functional systems, scaling equation of wavelet transform,and invariant measure system, are used to show that the homoclinic orbit solutions exist in the functional equat... 详细信息

关键词： functional equation, scaling equation, solitary wave, homoclinic orbit

Comparison of FGFR1 expression on lens epithelial cells between adults and fetuses

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International Journal of Ophthalmology(English edition) 2011年第1期4卷 37-39页

作者： Yu-fu liu, Shu-Ling Peng Beijing Ophthalmology & Visual Sciences Key Lab Tongren Eye Center Beijing Tongren Hospital Capital Medical University Beijing 10005 China Beijing Institute of Ophthalmology Beijing 100730 China

AIM: To study the differences of fibroblast growth factor receptor 1 (FGFR1) gene on human lens epithelial cells (HLECs) of adults and fetuses. METHODS: Indirect in situ RT-PCR was adopted for detection of FGFR1 gene. The cDNA of the nnRNA in the paraffin sections of fetus and adult HLEC was synthesized by reverse transcription reaction. After PCR amplification, in situ hybridization test was performed with synthesized oligonucleotide probe and relative quantification was carried out using image analysis. RESULTS: HLECs of adults and fetuses expressed FGFR1 gene, the expression level was higher in fetuses than in adults. The difference between them had significance (P<0.05). CONCLUSION: FGFR1 Exist in HLEC and the expression is age-related, which could be one of causes of the high occurrence of post operational after-cataract in children.

关键词： human lens epithelial cells fibroblast growth factor receptor 1 indirect in situ RT-PCR after-cataract

稀土合金化对钛合金激光焊接接头超塑变形行为的影响

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材料热处理学报 2024年第8期45卷 227-234页

作者：薛行雁程东海张冠星常云峰刘付丽郑州机械研究所有限公司新型钎焊材料与技术国家重点实验室河南郑州450001 南昌航空大学航空制造工程学院江西南昌330063

通过在TC4钛合金激光焊缝中添加Yb_(2)O_(3),以提高接头超塑性变形均匀性,观察Yb_(2)O_(3)对焊缝超塑性变形前后组织的影响,并以等轴化系数表征组织在超塑变形中的演变进程。结果表明,Yb_(2)O_(3)的加入能够提高焊缝的超塑性能,从而提... 详细信息

通过在TC4钛合金激光焊缝中添加Yb_(2)O_(3),以提高接头超塑性变形均匀性,观察Yb_(2)O_(3)对焊缝超塑性变形前后组织的影响,并以等轴化系数表征组织在超塑变形中的演变进程。结果表明,Yb_(2)O_(3)的加入能够提高焊缝的超塑性能,从而提高接头的变形均匀性。加入Yb_(2)O_(3)后能够降低焊缝原始β晶粒尺寸,并推动焊缝针状组织的等轴化进程,促进超塑性变形。随着Yb_(2)O_(3)含量的升高,其作用效果呈现先增加后减小的趋势,当Yb_(2)O_(3)含量为6 mass%时效果最佳,焊缝伸长率达到最大54.8%,变形协调系数K最大为0.21;β晶粒尺寸最小为308μm,等轴化系数J达到最大0.26。

关键词：钛合金 Yb_(2)O_(3) 超塑性变形变形协调系数K 等轴化系数J

Investigation of the biological roles of autophagy in appressorium morphogenesis in Magnaporthe oryzae

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2008年第10期9卷 793-796页

作者： Xiao-hong liu fu-cheng LIN State Key Laboratory for Rice Biology Biotechnology Institute Zhejiang University Hangzhou 310029 China

Magnaporthe oryzae has been used as a primary model organism for investigating fungus-plant interaction. Many researches focused on molecular mechanisms of appressorium formation to restrain this fungal pathogen. Autophagy is a very high conserved process in eukaryotic cells. Recently, autophagy has been considered as a key process in development and differentia-tion in M. oryzae. In this report, we present and discuss the current state of our knowledge on gene expression in appressorium formation and the progress in autophagy of rice blast fungi.

关键词： Magnaporthe oryzae Appressorium Gene expression Autophagy

Structure and magnetic property of bimetallic hexanuclear cluster based on 5-chlorosalicylaldehyde oxime

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Chinese Chemical Letters 2014年第6期25卷 937-940页

作者： Yuan Zhang Chen-Yan Wei Tian-fu liu School of Chemistry Beijing Institute of Technology

The bimetallic hexanuclear cluster [Mn4Ni2O2（Cl-Sao）6.（CH3OH）8].10CH3OH （1） was synthesized. Single-crystal X-ray analysis reveals that 1 consists of two [Mn2Ni（μ3-O）（Cl-Sao）3] subunits linked together via two pairs of long Ni-O bonds involving two oximate oxygen atoms and two phenolate oxygen atoms. Each Mn and Ni center achieves six-coordination with axial methanol molecules. The spin centers of the Mnm and Niu ions exchange magnetic coupling through O2-, O-phenolate and -N-O- bridges. The magnetic properties of the cluster have been investigated.

关键词： Cluster Crystal structure Magnetic property Manganese complex Nickel complex

OPEN ARCHITECTURE CNC SYSTEM HITCNC AND KEY TECHNOLOGY

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Chinese Journal of Mechanical Engineering 2007年第2期20卷 13-16页

作者： WANG Yongzhang liu Tao fu Hongya HAN Zhenyu School of Mechanical and Electrical Engineering Harbin Institute of Technology Harbin 150001 China

Aiming at the characteristics of modularity and reconfigurable in open architecture computer numerical control （CNC） system, the open architecture CNC system, Harbin Institute of Tech- nology computer numerical control （HITCNC）, is researched and manufactured based on the interface standards. The system＇s external interfaces are coincident with the corresponding international standards, and the internal interfaces follow the open modular architecture controller （OMAC） agreement. In the research and manufacturing process, object-oriented technology is used to ensure the openness of the HITCNC, and static programming is applied in the CNC system according to the idea of modularization disassembly. The HITCNC also actualizes real-time and unreal-time modules adopting real-time dynamical linked library （RTDLL） and component object model （COM）. Finite state ma- chine （FSM） is adopted to do dynamically modeling of HITCNC. The complete separation between the software and the hardware is achieved in the HITCNC by applying the SoftSERCANS technique. The application of the above key techniques decreases the programming workload greatly, and uses software programs replacing hardware functions, which offers plenty technique ensures for the openness of HITCNC. Finally, based on the HITCNC, a three-dimensional milling system is established. On the system, series experiments are done to validate the expandability and interchangeability of HITCNC. The results of the experiments show that the established open architecture CNC system HITCNC is correct and feasible, and has good openness.

关键词： Harbin Institute of Technology computer numerical control(HITCNC) Open architecture CNC system Interface standard Statically modeling Finite state machine (FSM) SoflSERCANS

Synthesis　and　Characterization　of　Tri(organotin)Substituted　Heteropolytungstates

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Chemical Research in Chinese Universities 1998年第1期14卷 6-11页

作者： Yang, Qi-hua Dai, Hui-cong liu, Jing-fu NE Normal Univ Dept Chem Changchun 130024 Peoples R China

ＳｙｎｔｈｅｓｉｓａｎｄＣｈａｒａｃｔｅｒｉｚａｔｉｏｎｏｆＴｒｉ（ｏｒｇａｎｏｔｉｎ）ＳｕｂｓｔｉｔｕｔｅｄＨｅｔｅｒｏｐｏｌｙｔｕｎｇｓｔａｔｅｓＹＡＮＧＱｉ－ｈｕａ，ＤＡＩＨｕｉ－ｃｏｎｇ，ＬＩＵＪｉｎｇ－ｆｕ... 详细信息

ＳｙｎｔｈｅｓｉｓａｎｄＣｈａｒａｃｔｅｒｉｚａｔｉｏｎｏｆＴｒｉ（ｏｒｇａｎｏｔｉｎ）ＳｕｂｓｔｉｔｕｔｅｄＨｅｔｅｒｏｐｏｌｙｔｕｎｇｓｔａｔｅｓＹＡＮＧＱｉ－ｈｕａ，ＤＡＩＨｕｉ－ｃｏｎｇ，ＬＩＵＪｉｎｇ－ｆｕ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍ...

关键词： organotin)Substituted Heteropolytungstates Synthesis Tri Characterization

Growth characteristics of directionally solidified Al_2O_3/YAG/ZrO_2 ternary hypereutectic in situ composites under ultra-high temperature gradient

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International Journal of Minerals,Metallurgy and Materials 2011年第1期18卷 121-125页

作者： Hai-jun Su Jun Zhang Lin liu Heng-zhi fu State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi＇an 710072 China

Oxide eutectic ceramic in situ composites have attracted significant interest in the application of high-temperature structural materials because of their excellent high-temperature strength,oxidation and creep resistance,as well as outstanding microstructural *** directionally solidified ternary Al2O3/YAG/ZrO2 hypereutectic in situ composite was successfully prepared by a laser zone remelting method,aiming to investigate the growth characteristic under ultra-high temperature *** microstructures and phase composition of the as-solidified hypereutectic were characterized by using scanning electron microscopy（SEM）,energy dispersive spectroscopy（EDS）,and X-ray diffraction（XRD）.The results show that the composite presents a typical hypereutectic lamellar microstructure consisting of fine Al2O3 and YAG phases,and the enriched ZrO2 phases with smaller sizes are randomly distributed at the Al2O3/YAG interface and in Al2O3 *** power and scanning rate strongly affect the sample quality and microstructure ***,coarse colony microstructures were also observed,and their formation and the effect of temperature gradient on the microstructure were discussed.

关键词： eutectics ceramic materials microstructure thermal gradients remelting solidification