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Enhanced Electroactivity of Facet-Controlled Co3O4 Nanocrystals for Enzymeless Biosensing

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Journal of Materials Science & Technology 2016年第1期32卷 24-27页

作者： Kuang-HsuWu xue leng Ian R. Gentle Da-Wei Wang School of Chemistry and Molecular Biosciences the University of Queensland Brisbane QLD 4072 Australia School of Chemical Engineering the University of New South Wales Sydney NSW 2052 Australia

In this work, we report enhanced electroactivity of Co304 nanocrystals （nanocubes, NCs and truncated nano-octahedra, TNO） on the exposed {111} facets as compared to the {001} facets in relation to the surface density and the activity of the octahedral Com species. Transmission electron microscopy, X-ray powder diffraction, X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy were em- ployed to characterize the crystal facets and materials properties. The enhanced electroactivity of {111 } crystal facets was evaluated by cyclic voltammetry and amperometric titration. Our results indicate that the {111 } facets in TNO has a better electroactivity for enzymeless glucose sensing with a decent glucose sensitivity of 32.54 μA （mmol/L）-1 cm-2.

关键词： Co304 nanoparticles Crystal facets Glucose sensing

Analysis of pore system model and physical property of coal reservoir in the Qinshui Basin

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Chinese Science Bulletin 2005年第S1期50卷 52-58页

作者： XU Hao ZHANG Shanghu leng xue TANG Dazhen WANG Mingshou China University of Geosciences Beijing 100083China Shanghai Offshore Oil&Gas Branch SinopecShanghai 200120China

The Qinshui Basin in China is a major area for exploration and development of high rank coalbed methane. Due to the high rank coal and complicated pore system, no substantial breakthrough in the exploration and development of coalbed methane has been made until now. Many systematic tests show that a pore system of coal reservoir has some features as follows: the porosity is relatively low; the pore system is dominated by micropores and transition pores; mesopores take the second place, and macropores are nearly absent, which is exceedingly adverse for production of coal-bed methane. However, testing data also revealed the differential development for the pore of high rank coal reservoirs in the Qinshui Basin, which necessarily led to the different physical properties of desorption, diffusion and permeability. This paper classifies the testing data using cluster analysis method and selects the typical samples to establish four pore system models, analyzes the differences of reservoir physical property, and provides a guidance for the exploration and development of coalbed methane in the Qinshui Basin.

关键词： Qinshui Basin coal reservoirs differential development pore system model reservoir physical property.

Investigation on effects of new physics in c→(s,d)l+νltransitions

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Chinese Physics C 2021年第6期45卷 74-90页

作者： xue leng Xiao-Long Mu Zhi-Tian Zou Ying Li Department of Physics Yantai UniversityYantai 264005China Institute of Particle Physics and Key Laboratory of Quark and Lepton Physics(MOE) Central China Normal UniversityWuhan 430079China Center for High Energy Physics Peking UniversityBeijing 100871China

Anomalies in decays induced by b→ct Ve(l=e,μ,T)transitions may imply lepton flavor universality violations,which raises questions on such phenomena in the D decays induced by c→(s,d)t+ve *** measurements of the pure leptonic and semi-leptonic D decays agree with the standard model(SM)predictions,and such agreements can be used to constrain the new physics(NP)*** this work,we extend SM by as-suming general efective Hamiltonians describing the c→(s,d)t+Ve transitions including the full set of the four-fermion *** the latest experimental data,we perform a least χ^(2) fit of the Wilson cofficient corresponding to each *** results indicate that the Wilson coefficients of tensor and scalar operators in the muon sector are in the order of 0(10^(-2))while others are in the order of 0(10^(-3)).The lepton flavor universality could be violated by interactions with the scalar *** also determine that the pure leptonic decays are significantly sensitive to scalar *** efects of NP on the semi-leptonic decays with electron final state are negligible;however,for the decays with the muon final state,the effects of scalar and tensor operators will appear in the forward-back-ward asymmetries and the muon helicity asymmetries of D→Pμ^(+)Vpμ*** future measurements of these de-cays in the BESIII and Belle II experiments will facilitate the evaluation of NP effects.

关键词： D decays new physics semi-leptonic decays

NUMERICAL SIMULATION OF FLOW AND HEAT TRANSFER CHARA-CTERISTICS OUTSIDE A PERIODICALLY VIBRATING TUBE

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Journal of Hydrodynamics 2008年第5期20卷 629-636页

作者： JIANG Bo TIAN Mao-cheng leng xue-li TANG Yu-feng PAN Ji-hong School of Energy Source and Power Engineering Shandong University Jinan 250061 China

Fluid flow and heat transfer characteristics outside a vibrating tube were numerically simulated by the dynamic mesh method. The mechanism of heat transfer enhancement via periodic vibration of the tube was explored by using the field synergy principle. It is found that the field synergy angle between fluid velocity vector and temperature gradient vector for a periodically vibrating tube is significantly smaller than that for a stationary tube, and it changes approximately according to the sinusoidal law in a vibration period. The effect of time phase of the vibration on the field synergy angle and convective heat transfer coefficient were also discussed. Results indicate that the vibration can enhance heat transfer and this effect is more remarkable when time phase angle ranges between 50° and 1400 in a half period. Especially when the time phase angle is 90°, the average field synergy angle outside the tube reaches the minimum, which leads to the best heat transfer performance.

关键词： heat transfer enhancement dynamic mesh vibration field synergy Computational Fluid Dynamics (CFD)

Phenformin activates ER stress to promote autophagic cell death via NIBAN1 and DDIT4 in oral squamous cell carcinoma independent of AMPK

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International Journal of Oral Science 2024年第3期16卷 471-485页

作者： Dexuan Zhuang Shuangshuang Wang Huiting Deng Yuxin Shi Chang Liu xue leng Qun Zhang Fuxiang Bai Bin Zheng Jing Guo Xunwei Wu School and Hospital of Stomatology Cheeloo College of MedicineShandong University&Shandong Key Laboratory of Oral Tissue Regeneration&Shandong Engineering Research Center of Dental Materials and Oral Tissue Regeneration&Shandong Provincial Clinical Research Center for Oral DiseasesJinanChina Engineering Laboratory for Biomaterials and Tissue Regeneration Ningbo Stomatology HospitalSavaid Stomatology SchoolHangzhou Medical CollegeNingboChina Cedars-Sinai Cancer Institute Department of Biomedical SciencesCedars-Sinai Medical CenterLos AngelesCAUSA

The efficient clinical treatment of oral squamous cell carcinoma(OSCC)is still a challenge that demands the development of effective new *** has been shown to produce more potent anti-tumor activities than metformin on different tumors,however,not much is known about the influence of phenformin on OSCC *** found that phenformin suppresses OSCC cell proliferation,and promotes OSCC cell autophagy and apoptosis to significantly inhibit OSCC cell growth both in vivo and in ***-seq analysis revealed that autophagy pathways were the main targets of phenformin and identified two new targets DDIT4(DNA damage inducible transcript 4)and NIBAN1(niban apoptosis regulator 1).We found that phenformin significantly induces the expression of both DDIT4 and NIBAN1 to promote OSCC ***,the enhanced expression of DDIT4 and NIBAN1 elicited by phenformin was not blocked by the knockdown of AMPK but was suppressed by the knockdown of transcription factor ATF4(activation transcription factor 4),which was induced by phenformin treatment in OSCC ***,these results revealed that phenformin triggers endoplasmic reticulum(ER)stress to activate PERK(protein kinase R-like ER kinase),which phosphorylates the transitional initial factor eIF2,and the increased phosphorylation of eIF2 leads to the increased translation of *** summary,we discovered that phenformin induces its new targets DDIT4 and especially NIBAN1 to promote autophagic and apoptotic cell death to suppress OSCC cell *** study supports the potential clinical utility of phenformin for OSCC treatment in the future.

关键词： drugs treatment AMPK DDI

THE TYPES OF LAKE IN SONGNEN PLAIN AND THEIR REGIONAL CHARACTER

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Chinese Geographical Science 2000年第4期10卷 79-83页

作者： LU Jin-fu JIE Dong-mei LI Zhi-min leng xue-tian Geography Department Northeast Normal UniversityChangchun 130024P.R.China

The lake groups in the Songnen Plain are low plain lake groups, which are located in the temperate semihumid area in China. They are characterized by small area, shallow basin, thick density and various types. In the try for classifying comprehensively the lake groups, a classification system is developed based on three main factors, i.e. forming cause, water quantity and water quality. The most internal character can be concisely grasped through three principal indexes and three auxiliary indexes of three main factors. A sample of complicated changeable path is put forward for further analyzing and outlining these basic types, in the meantime, it’s linking up easily with the classification system of the single factor. According to the regional environment, the regional differences of the type composition and the principal types, the lake groups in the Songnen Plain can be divided into 6 sub-regions.

关键词： Songnen Plain types of lake regional character

近十年我国档案学与图书馆学领域知识管理研究的计量分析

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档案学研究 2013年第6期 9-14页

作者：冷雪华东师范大学商学院上海200241

文章选取期刊研究论文,从文献量、来源期刊、作者情况、发文机构、高频关键词、主题分布和基金来源等角度对我国档案学和图书馆学领域知识管理研究的差距进行了计量分析,指出档案学领域应更加重视知识管理的研究,并从宏观、中观和微观... 详细信息

文章选取期刊研究论文,从文献量、来源期刊、作者情况、发文机构、高频关键词、主题分布和基金来源等角度对我国档案学和图书馆学领域知识管理研究的差距进行了计量分析,指出档案学领域应更加重视知识管理的研究,并从宏观、中观和微观三个层面为档案学知识管理研究给出了具体建议。

关键词：知识管理档案学图书馆学文献计量

睡美人创新研究在科学、技术及创新政策制定中的应用

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情报杂志 2019年第2期38卷 43-48页

作者：冷雪中国科学院文献情报中心北京100190 中国科学院大学北京100190

[目的/意义]睡美人创新是指被专利唤醒的睡美人文献,体现了论文与专利之间的知识扩散情况,论文与专利作为基础研究与应用研究最重要的产出,论文与专利之间的关系能够反映基础研究与应用研究之间的转化情况,为以基础研究与应用研究为政... 详细信息

[目的/意义]睡美人创新是指被专利唤醒的睡美人文献,体现了论文与专利之间的知识扩散情况,论文与专利作为基础研究与应用研究最重要的产出,论文与专利之间的关系能够反映基础研究与应用研究之间的转化情况,为以基础研究与应用研究为政策客体的科学、技术与创新政策提供定量依据。[方法/过程]首先梳理了推迟认可相关概念之间的关系,并对睡美人文献的研究现状从识别与机理两个方面进行了总结,归纳了睡美人创新的内涵,提出了睡美人创新研究的现状以及存在的不足与局限,最后结合政策实践指出睡美人创新在科学、技术与创新政策中的应用情况。[结果/结论]睡美人创新是科学计量学领域的最新研究热点,对睡美人创新进行研究不仅对科学计量学和科学学有着重要意义,而且也能为科学政策、技术政策和创新政策带来新的科学依据。

关键词：科学计量学创新政策睡美人创新睡美人文献

Piezoresponse Force Microscopy Imaging of Ferroelectric Domains in Bi(Zn_(1/2)Ti_(1/2))O_(3)−Pb(Mg_(1/3)Nb_(2/3))O_(3)−PbTiO_(3) Piezoelectric Ceramics

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Chinese Physics Letters 2011年第8期28卷 297-299页

作者： LIU Li-Ming ZENG Hua-Rong CAO Zhen-Zhu leng xue ZHAO Kun-Yu LI Guo-Rong YIN Qing-Rui Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai 200050 Kunming Institute of Physics Kunming 650223 College of Chemical Engineering Inner Mongolia University of TechnologyHuhhot 010051

Bismuth zinc titanate dopied lead magnesium niobate-lead titanate[Bi(Zn_(1/2)Ti_(1/2))O_(3)−Pb(Mg_(1/3)Nb_(2/3))O_(3)−PbTiO_(3)(BZT-PMN-PT)]piezoelectric ceramics are synthesized by the conventional solid state reaction *** domain structures and the evolutionary behavior of BZT-PMN-PT ceramics under an external in-plane electric field are investigated by piezoresponse force microscopy(PFM).It is found that the BZT doping has a significant effect on the domain configurations and the domain kinetic behavior of the piezoelectric BZT-PMN-PT solid solution *** embedded in the macrodomains,induced by the BZT dopant in the solid solution ceramics,are clearly observed by PFM and their volume increases with increasing amounts of BZT *** microdomains of BZT-PMN-PT piezoelectric ceramics exhibit better domain dynamic behavior stability than macrodomains under an external in-plane electric field.

关键词： ceramics piezoelectric behavior