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Preparation of nano-CuO-loaded halloysite nanotubes with high catalytic activity for selective oxidation of cyclohexene

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Chinese Chemical Letters 2016年第1期27卷 81-84页

作者： Zhi-Lin Cheng Wei sun College of Chemistry and Chemical Engineering Yangzhou University

A facile preparation method of nano-CuO catalysts, assembled in the hollow nanotube of halloysite nanotubes（HNTs）, was developed. The characterizations of XRD, TEM, SEM, BET, XRF and FT-IR were used to analyze the structure and properties of the nano-CuO/HNT loaded catalyst. The XRD patterns indicated that the CuO nanoparticles on HNTs were monoclinic phase. The TEM-EDX and SEM images confirmed that most of nano-CuO catalysts with the crystal size of ca. 20 nm were assembled into the hollow nanotube of HNTs. The catalytic performance of the nano-CuO/HNT catalysts was evaluated by using selective oxidation of cyclohexene. The reaction temperature and recycling times were investigated. The results reveal that the nano-CuO/HNT catalysts exhibit an excellent catalytic oxidation performance for selective oxidation of cyclohexene to 2-cyclohexene-1-one.

关键词： Cyclohexene CuO Selective oxidation HNTs

A small difference in nuclear mass could make a big impact in the cosmos

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Chinese Science Bulletin 2011年第16期56卷 1637-1638页

作者： sun yang Department of Physics Shanghai Jiao Tong University Shanghai 200240 China

In a recent paper [1] published in Physical Review Letters, scientists at the Institute of Modern Physics, Chinese Academy of Sciences, have reported their first results from the Cooler Storage Ring at the Heavy Ion Research Facility, a newly-constructed major scientific facility in Lanzhou, China. As a part of an international collaboration including colleagues from Europe, USA and Japan, they were able to identify in experiments the

关键词：近代物理研究所重离子研究装置核质宇宙冷却储存环中国科学院科学家大科学

ACSL5,a prognostic factor in acute myeloid leukemia,modulates the activity of Wnt/β-catenin signaling by palmitoylation modification

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Frontiers of Medicine 2023年第4期17卷 685-698页

作者： Wenle ye Jinghan Wang Jiansong Huang Xiao He Zhixin Ma Xia Li xin Huang Fenglin Li Shujuan Huang Jiajia Pan Jingrui Jin Qing Ling yungui Wang yongping yu Jie sun Jie Jin Department of Hematology The First Affiliated HospitalZhejiang University College of MedicineHangzhou 310003China Key Laboratory of Hematopoietic Malignancies Diagnosis and TreatmentHangzhou 310009China Research Centre Centre hospitalier de l’Universitéde Montréal(CRCHUM)MontrealQuebec H2L 4M1Canada Women’s Hospital School of MedicineZhejiang UniversityHangzhou 310006China Zhejiang Province Key Laboratory of Anti-Cancer Drug Research College of Pharmaceutical SciencesZhejiang UniversityHangzhou 310058China Cancer Center Zhejiang UniversityHangzhou 310058China

Acyl-CoA synthetase long chain family member 5(ACSL5),is a member of the acyl-CoA synthetases(ACSs)family that activates long chain fatty acids by catalyzing the synthesis of fatty *** dysregulation of ACSL5 has been reported in some cancers,such as glioma and colon ***,little is known about the role of ACSL5 in acute myeloid leukemia(AML).We found that the expression of ACSL5 was higher in bone marrow cells from AML patients compared with that from healthy ***5 level could serve as an independent prognostic predictor of the overall survival of AML *** AML cells,the ACSL5 knockdown inhibited cell growth both in vitro and in ***,the knockdown of ACSL5 suppressed the activation of the Wnt/β-catenin pathway by suppressing the palmitoylation modification of ***,triacsin c,a pan-ACS family inhibitor,inhibited cell growth and robustly induced cell apoptosis when combined with ABT-199,the FDA approved BCL-2 inhibitor for AML *** results indicate that ACSL5 is a potential prognosis marker for AML and a promising pharmacological target for the treatment of molecularly stratified AML.

关键词： acute myeloid leukemia acyl-CoA synthetase long chain family member 5 Wnt3a palmitoylation ABT-199

Contrastive Analysis of the Domestic and Oversea Research on Linguistic Economics

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学术界 2014年第12期 262-266页

作者： sun Xiaojun School of Business Administration Zhongnan University of Economics and Law

As a newly-rising inter-discipline,linguistic economics has been developing rapidly since half a century ago and drawing attention from the academic circle both at home and abroad. This paper reviews the origin of the research upon linguistic economics and the historical development,enumerates the hot points and important achievements and at last introduces the three possible development directions of the future research upon linguistic economics.

关键词： linguistic economics language industry language planning language policies

Surgical reconstruction after ablative maxillary tumor surgery

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中国口腔颌面外科杂志 2008年第B5期6卷 90-91页

作者： Jian sun J Li y Weng Department of Oral & Maxillofacial Surgery Ninth People'sHospital Shanghai Jiao Tong University School of MedicineShanghai 200011 China

Comparative Study on Traction Battery Charging Strategies from the Perspective of Material Structure

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Automotive Innovation 2022年第4期5卷 427-437页

作者： Mengyang Gao Liduo Chen Tianyi Ma Weijian Hao Zhipeng sun yuhan sun Shiqiang Liu China Automotive Technology and Research Center Co.Ltd Tianjin 300300China CAT ARC NEV Test Center(Tianjin)Co.Ltd Tianjin 300300China

The service life of an electric vehicle is,to some extent,determined by the life of the traction battery.A good charging strat-egy has an important impact on improving the cycle life of the lithium-ion ***,this paper presents a comparative study on the cycle life and material structure stability of lithium-ion batteries,based on typical charging strategies currently applied in the market,such as constant current charging,constant current and constant voltage charging,multi-stage constant current charging,variable current intermittent charging,and pulse *** with the reference charging strategy,the charging capacity of multi-stage constant current charging reaches 88%.Moreover,the charging time is reduced by 69%,and the capacity retention rate after 500 cycles is 93.3%.Through CT,XRD,SEM,and Raman spectroscopy analysis,it is confirmed that the smaller the damage caused by this charging strategy to the overall structure of the battery and the layered structure and particle size of the positive electrode material,the higher the capacity retention rate *** work facilitates the development of a better charging strategy for a lithium-ion battery from the perspective of material structure.

关键词： Traction battery Charging strategy Cycle life Material evolution

An active self-cleaning surface system for photovoltaic modules using anisotropic ratchet conveyors and mechanical vibration

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Microsystems & Nanoengineering 2020年第1期6卷 413-424页

作者： Di sun Karl F.Bohringer Department of Electrical and Computer Engineering University of WashingtonSeattleWA 98195USA Institute for Nano-Engineered Systems University of WashingtonSeattleWA 98195USA

The purpose of this work is to develop an active self-cleaning system that removes contaminants from a solar module surface by means of an automatic,water-saving,and labor-free *** output efficiency of a solar module can be degraded over time by dust accumulation on top of the cover glass,which is often referred to as“soiling”.This paper focuses on creating an active self-cleaning surface system using a combination of microsized features and mechanical *** features,which are termed anisotropic ratchet conveyors(ARCs),consist of hydrophilic curved rungs on a hydrophobic *** different ARC systems have been designed and fabricated with self-assembled monolayer(SAM)silane and fluoropolymer thin film(Cytop).Fabrication processes were established to fabricate these two systems,including patterning Cytop without degrading the original Cytop *** droplet transport characteristics,including anisotropic driving force,droplet resonance mode,cleaning mechanisms,and system power consumption,were studied with the help of a high-speed camera and custom-made test *** droplet can be transported on the ARC surface at a speed of 27 mm/s and can clean a variety of dust particles,either water-soluble or *** transmission was measured to show that Cytop can improve transmittance by 2.5~3.5%across the entire visible wavelength ***-time demonstrations of droplet transport and surface cleaning were performed,in which the solar modules achieved a 23 percentage-point gain after cleaning.

关键词： anisotropic cleaning remove

Effects of building aspect ratio,diurnal heating scenario,and wind speed on reactive pollutant dispersion in urban street canyons

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Journal of Environmental Sciences 2012年第12期24卷 2091-2103页

作者： Nelson y.O.Tong Dennis y.C.Leung Department of Mechanical Engineering The University of Hong Kong

A photochemistry coupled computational fluid dynamics （CFD） based numerical model has been developed to model the reactive pollutant dispersion within urban street canyons, particularly integrating the interrelationship among diurnal heating scenario （solar radiation affections in nighttime, daytime, and sun-rise/set）, wind speed, building aspect ratio （building-height-to-street-width）, and dispersion of reactive gases, specifically nitric oxide （NO）, nitrogen dioxide （NO2） and ozone （O3） such that a higher standard of air quality in metropolitan cities can be achieved. Validation has been done with both experimental and numerical results on flow and temperature fields in a street canyon with bottom heating, which justifies the accuracy of the current model. The model was applied to idealized street canyons of different aspect ratios from 0.5 to 8 with two different ambient wind speeds under different diurnal heating scenarios to estimate the influences of different aforementioned parameters on the chemical evolution of NO, NO2 and 03. Detailed analyses of vertical profiles of pollutant concentrations showed that different diurnal heating scenarios could substantially affect the reactive gases exchange between the street canyon and air aloft, followed by respective dispersion and reaction. Higher building aspect ratio and stronger ambient wind speed were revealed to be, in general, responsible for enhanced entrainment of 03 concentrations into the street canyons along windward walls under all diurnal heating scenarios. Comparatively, particular attention can be paid on the windward wall heating and nighttime uniform surface heating scenarios.

关键词： photochemistry reactive pollutant dispersion building aspect ratio diurnal heating scenario wind speed urban streetcanyon

Enforcing Strong Stability of Explicit Runge-Kutta Methods with Superviscosity

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Communications on Applied Mathematics and Computation 2021年第4期3卷 671-700页

作者： Zheng sun Chi-Wang Shu Department of Mathematics The Ohio State UniversityColumbusOH 43210USA Division of Applied Mathematics Brown UniversityProvidenceRI02912USA

A time discretization method is called strongly stable(or monotone),if the norm of its numerical solution is *** this property is desirable in various of contexts,many explicit Runge-Kutta(RK)methods may fail to preserve *** this paper,we enforce strong stability by modifying the method with superviscosity,which is a numerical technique commonly used in spectral *** main focus is on strong stability under the inner-product norm for linear problems with possibly non-normal *** propose two approaches for stabilization:the modified method and the filtering *** modified method is achieved by modifying the semi-negative operator with a high order superviscosity term;the filtering method is to post-process the solution by solving a diffusive or dispersive problem with small *** linear problems,most explicit RK methods can be stabilized with either approach without accuracy ***,we prove a sharp bound(up to an equal sign)on diffusive superviscosity for ensuring strong *** nonlinear problems,a filtering method is *** examples with linear non-normal ordinary differential equation systems and for discontinuous Galerkin approximations of conservation laws are performed to validate our analysis and to test the performance.

关键词： Runge-Kutta(RK)methods Strong stability Superviscosity Hyperbolic conservation laws Discontinuous Galerkin methods