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Properties of PA(polyamide) coating and PA/MoS2 composite coatings by flame spraying

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中国有色金属学会会刊：英文版 2004年第z1期14卷 67-71页

作者： XU Hai-yan zhou hui-di CHEN Jian-min FENG Zhi-zhong State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of Sciences Lanzhou 730000 China Graduate School Chinese Academy of Science China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of Sciences Lanzhou 730000 China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of Sciences Lanzhou 730000 China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of Sciences Lanzhou 730000 China

PA and PA/MoS2 composite coatings were prepared by flame-spraying. The thermal properties, crystallinity, microstructure and tribological properties were investigated with Fourier transform infrared (FTIR), differential scanning calorimetry (DSC), scanning electron microscopy(SEM), and MM-200 model wear tester. Temperature influences the final morphological structure of the coatings. Tribological experiment results indicate that the MoS2 filled PA coating has different wear resistance compared with the PA coating without MoS2 filler. A high content of MoS2 decreases the hardness of composite coating and enhances the wear rate. The 1 %-3% content of MoS2 has advantages to the tribological ProPerties of PA composite coatings.

关键词： flame spraying polymer coating wear filler

A Confocal Technique Applicable to Studies of Cellular pH-related Signaling in Plants

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Journal of Integrative Plant Biology 2008年第6期50卷 682-690页

作者： Bing-Bing Lit Zhi-hui Gao Xiao-yan zhou hui-Bo Ren Min Xie Yi-Juan Fan Jian-Fang Hu Wen-Suo Jia College of Agronomy and Biotechnology China Agricultural University Beijing 100094 China

pH may act as a crucial signal in both animal and plant cells. It is very difficult to monitor pH signals and this has largely hindered progress in the investigation of pH signaling, particulady systematic pH signaling. Here, we report the development of a confocal technique to monitor leaf apoplastic pH in intact plants, which is particularly suitable for the studies on root to shoot signaling. A variety of different pH indicators and plant species were tested. It was found that different pH indicators, for example, 2＇,7＇-Bis-（2-carboxyethyl）-5-（and-6）-carboxyfluoresce （BCECF）, SNARF-4F 5-（and-6）- carboxylic acid （SNARF） and DM-NERF （NERF）, were of different properties, and to successfully monitor pH at a sub-cellular level, the comparability between the pH indicator and plant species must be involved according to their suitable pH range and loading characteristics. The loading characteristics of different pH indicators differ with different plant species, cell types and their developing stages. No matter what methods were adopted, BCECF and SNARF could not be loaded specifically in the leaf apoplast in sunflower, tomato, and Comelina communis L. In contrast, regardless of the methods adopted, NERF could be loaded efficiently and specifically in the leaf apoplast in C. communis, but not in other plants. In C. communis, the determination coefficient for in vitro and in situ calibration of NERF was very high, which was respectively 0.9951 and 0.991 6, and therefore, the adoption of NERF together with C. communis could construct an ideal experimental system that is suitable for the investigation of pH systematic signaling. Ratio image analysis demonstrated that the leaf apoplastic pH was about 5.5 in non-stressed conditions, and water deficit could trigger an increase in pH by about half a pH unit, which is the first evidence to directly indicate that pH is able to act as a systematic signal under water deficit conditions.

关键词： confocal microscope pH signaling water deficit.

tRNAs as regulators in gene expression

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Science China(Life Sciences) 2009年第3期52卷 245-252页

作者： LI yan & zhou hui Key Laboratory of Gene Engineering of the Ministry of Education,State Key Laboratory for Biocontrol,Sun yan-Sen University Guangzhou 510275,China 1. Key Laboratory of Gene Engineering of the Ministry of Education State Key Laboratory for Biocontrol Sun Yan-Sen University Guangzhou 510275 China

Transfer RNAs(tRNAs) hold a central place in protein synthesis by interpreting the genetic information stored in DNA into the amino acid sequence of protein,thus functioning as "adaptor" *** recent years,however,various studies have shown that tRNAs have additional functions beyond participating in protein *** suffering from certain nutritional stresses,tRNAs change the level of aminoacylation to became uncharged,and these uncharged tRNAs act as effector molecules to regulate global gene expression,so that the stressed organism copes with the adverse environmental *** budding yeast and certain mammalian cells,the retrograde movement of mature tRNAs from cytoplasm to nucleus serves as a mechanism for the surveillance system within the nucleus to continue monitoring the integrity of *** the other hand,this retrograde action effectively reduces the global protein synthesis level under conditions of nutritional *** recently,various publications have shown that tRNAs are not stable molecules in an absolute *** certain physiological or environmental stresses,they are specifically cleaved into fragments of different lengths in the anticodon loop or anticodon left *** cleavages are not a meaningless random degradation ***,a novel class of signal molecules such as tRNA halves or sitRNAs may be produced,which are closely correlated with the modulation of global gene *** of the regulatory functions of tRNAs is a frontier,which seeks to reveal the structural and functional diversity of tRNAs as well as their vital functions during the expression of genetic information.

关键词： tRNA sitRNA gene expression regulation stress response

Transfer of quantum entangled states between superconducting qubits and microwave field qubits

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Frontiers of physics 2022年第6期17卷 163-174页

作者： Tong Liu Bao-Qing Guo yan-hui zhou Jun-Long Zhao Yu-Liang Fang Qi-Cheng Wu Chui-Ping yang Quantum Information Research Center Shangrao Normal UniversityShangrao 334001China Department of Physics Hangzhou Normal UniversityHangzhou 311121China

Transferring entangled states between matter qubits and microwave-field(or optical-field)qubits is of fundamental interest in quantum mechanics and necessary in hybrid quantum information processing and quantum *** here propose a way for transferring entangled states between superconducting qubits(matter qubits)and microwave-field *** proposal is realized by a system consisting of multiple superconducting qutrits and microwave ***,“qutrit”refers to a three-level quantum system with the two lowest levels encoding a qubit while the third level acting as an auxiliary *** contrast,the microwave-field qubits are encoded with coherent states of microwave *** the third energy level of each qutrit is not populated during the operation,decoherence from the higher energy levels is greatly *** entangled states can be deterministically transferred because measurement on the states is not *** operation time is independent of the number of superconducting qubits or microwave-field *** addition,the architecture of the circuit system is quite simple because only a coupler qutrit and an auxiliary cavity are *** an example,our numerical simulations show that high-fidelity transfer of entangled states from two superconducting qubits to two microwave-field qubits is feasible with present circuit QED *** proposal is quite general and can be extended to transfer entangled states between other matter qubits(e.g.,atoms,quantum dots,and NV centers)and microwave-or optical-field qubits encoded with coherent states.

关键词： tranferring entangled states superconducting qubits microwave field qubits coherent states circuit QED

Changes in blood coagulation during cardiopulmonary bypass in children of different ages with cyanotic congenital heart disease

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中华麻醉学杂志 2010年第B2期30卷 35-37页

作者： CHEN Yu HUANG yan-hui BAI Jie zhou Hong SUN Ying ZHU Ming Department of Anesthesiology Shanghai Children's Medical CenterSchool of Medicine Shanghai Jiaotong University Shanghai 200127China

MESHLESS METHOD OF DUAL RECIPROCITY HYBRID RADIAL BOUNDARY NODE METHOD FOR ELASTICITY

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Acta Mechanica Solida Sinica 2010年第5期23卷 447-458页

作者： Fei yan Xiating Feng hui zhou 1(State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Science,Wuhan 430071,China) [a] State Key Laboratory of Geomechanics Geotechnical Engineering Institute of Rock Soil Mechanics Chinese Academy of Science Wuhan 430071 China

Combining the radial point interpolation method （RPIM）, the dual reciprocity method （DRM） and the hybrid boundary node method （HBNM）, a dual reciprocity hybrid radial boundary node method （DHRBNM） is proposed for linear elasticity. Compared to DHBNM, RPIM is exploited to replace the moving least square （MLS） in DHRBNM, and it gets rid of the deficiency of MLS approximation, in which shape functions lack the delta function property, the boundary condition can not be applied easily and directly and it＇s computational expense is high. Besides, different approximate functions are discussed in DRM to get the interpolation property, in which the accuracy and efficiency for different basis functions are compared. Then RPIM is also applied in DRM to replace the conical function interpolation, which can greatly improve the accuracy of the present method. To demonstrate the effectiveness of the present method, DHBNM is applied for comparison, and some numerical examples of 2-D elasticity problems show that the present method is much more effective than DHBNM.

关键词： meshless method hybrid boundary node method dual reciprocity method radial point interpolation method elasticity

Protective effect and mechanism of stronger neo-minophagen C against fulminant hepatic failure

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World Journal of Gastroenterology 2007年第3期13卷 462-466页

作者： Bao-Shan yang Ying-Ji Ma yan Wang Li-yan Chen Man-Ru Bi Bing-Zhu yan Lu Bai hui zhou Fu-Xiang Wang Department of Infectious Diseases the First Clinical Hospital of Harbin Medical University Harbin 150001 Heilongjiang Province China

AIM： To investigate the protective effect of stronger neo-minophafen C （SNMC） on fulminant hepatic failure （FHF） and its underlying mechanism. METHODS： A mouse model of FHF was established by intraperitoneal injection of galactosamine （D-Gal N） and lipopolysaccharide （LPS）. The survival rate, liver function, inflammatory factor and liver pathological change were obtained with and without SNMC treatment. Hepatoo/te survival was estimated by observing the stained mitochondria structure with terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate fluorescence nick end labeling （TUNEL） method and antibodies against cytochrome C （Cyt-C） and caspase-3. RESULTS： The levels of plasma tumor necrosis factor alpha （TNF-α）, nitric oxide （NO）, ET-1, interleukin-6 （IL-6）, and the degree of hepatic tissue injury were decreased in the SNMC-treated groups compared with those in the model group （P 〈 0.01）. However, there were no differences after different dosages administered at different time points. There was a significant difference in survival rates between the SNMC-treated groups and the model group （P 〈 0.01）. The apoptosis index was 32.3% at 6 h after a low dose of SNMC, which was considerably decreased from 32.3% ± 4.7% vs 5% ± 2.83% （P 〈 0.05） to 5% on d 7. The expression of Cyt-C and caspase-3 decreased with the prolongation of therapeutic time. Typical hepatocyte apoptosis was obviously ameliorated under electron microscope with the prolongation of therapeutic time. CONCLUSION： SNMC can effectively protect liver against FHF induced by LPS/D-Gal N. SNMC can prevent hepatocyte apoptosis by inhibiting inflammatory reaction and stabilizing mitochondria membrane to suppress the release of Cyt-C and sequent activation of caspase-3.

关键词： Stronger neo-minophagen C Fulminant hepatic failure Cytochrome C Caspase-3

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柑橘病毒类病害诊断技术研究进展

园艺学报 2016年第9期43卷 1675-1687页

作者：金鑫张艳慧唐萌周彦西南大学/中国农业科学院柑桔研究所重庆400712

柑橘病毒类病害对世界柑橘产业造成了严重的损失。诊断技术是防控柑橘病毒类病害的重要保障。对指示植物鉴定、电镜技术、血清学方法、核酸杂交、(RT-)PCR以及新近出现的环介导恒温扩增、基因芯片和高通量测序等技术在柑橘病毒类病害诊... 详细信息

柑橘病毒类病害对世界柑橘产业造成了严重的损失。诊断技术是防控柑橘病毒类病害的重要保障。对指示植物鉴定、电镜技术、血清学方法、核酸杂交、(RT-)PCR以及新近出现的环介导恒温扩增、基因芯片和高通量测序等技术在柑橘病毒类病害诊断中所取得的进展进行综述,并对今后的发展方向进行了展望,旨在为更好地防治柑橘病毒类病害提供借鉴。

关键词：柑橘病毒类病害诊断技术

Integration of Electrical Properties and Polarization Loss Modulation on Atomic Fe–N‑RGO for Boosting Electromagnetic Wave Absorption

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Nano-Micro Letters 2025年第2期17卷 517-532页

作者： Kaili Zhang Yuefeng yan Zhen Wang Guansheng Ma Dechang Jia Xiaoxiao Huang Yu zhou State Key Laboratory of Precision Welding&Joining of Materials and Structures Harbin Institute of TechnologyHarbin 150001People’s Republic of China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001People’s Republic of China MIIT Key Laboratory of Advanced Structural‑Functional Integration Materials&Green Manufacturing Technology Harbin Institute of TechnologyHarbin 150001People’s Republic of China

Developing effective strategies to regulate graphene’s conduction loss and polarization has become a key to expanding its application in the electromagnetic wave absorption(EMWA)*** on the unique energy band structure of graphene,regulating its bandgap and electrical properties by introducing heteroatoms is considered a feasible ***,metal-nitrogen doping reduced graphene oxide(M–N-RGO)was prepared by embedding a series of single metal atoms M–N_(4) sites(M=Mn,Fe,Co,Ni,Cu,Zn,Nb,Cd,and Sn)in RGO using an N-coordination atom-assisted *** composites had adjustable conductivity and polarization to optimize dielectric loss and impedance matching for efficient EMWA *** results showed that the minimum reflection loss(RL_(min))of Fe–N-RGO reaches−74.05 dB(2.0 mm)and the maximum effective absorption bandwidth(EAB_(max))is 7.05 GHz(1.89 mm)even with a low filler loading of only 1 wt%.Combined with X-ray absorption spectra(XAFS),atomic force microscopy,and density functional theory calculation analysis,the Fe–N_(4) can be used as the polarization center to increase dipole polarization,interface polarization and defect-induced polarization due to d-p orbital hybridization and structural ***,electron migration within the Fe further leads to conduction loss,thereby synergistically promoting energy *** study demonstrates the effectiveness of metal-nitrogen doping in regulating the graphene′s dielectric properties,which provides an important basis for further investigation of the loss mechanism.

关键词： Electromagnetic wave absorption Fe-N-RGO Dipole polarization Conduction loss Impedance matching