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Two-dimensional materials of group-IVA boosting the development of energy storage and conversion

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Carbon Energy 2020年第1期2卷 54-71页

作者： Qiang guo Nan Chen Liangti qu Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials Key Laboratory of Cluster ScienceMinistry of Education of ChinaSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijingChina Key Laboratory for Advanced Materials Processing Technology Ministry of Education of ChinaState Key Laboratory of TribologyDepartment of Mechanical EngineeringTsinghua UniversityBeijingChina Department of Chemistry Tsinghua UniversityBeijingChina

Graphene,an emerging fabric of carbon atoms,has manifested its versatility in all kinds of fields encompassing electronics,optoelectronics,thermoelectrics,taking advantage of its excellent mechanical strength,exceptional electronic and thermal conductivities,high surface specific area,and so *** prosperity of graphene never seen before has led the attention to silicene,siloxene,germanene,stanene,and plumbene due to their promising applications in the quantum spin Hall effect,topological insulator,batteries,capacitors,catalysis,and topological ***,we review the existing production methods,numerous applications of two-dimensional group-IVA materials,and critically discuss the challenges of these materials,providing potential implications to the exploration of uncharted material systems.

关键词： germanene graphene plumbene silicene siloxene stanene

Significance of viral status on occurrence of hepatitis B-related hepatocellular carcinoma

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World Journal of Gastroenterology 2014年第20期20卷 5999-6005页

作者： Li-Shuai qu guo-Xiong Zhou Department of Gastroenterology Affiliated Hospital of Nantong University

Hepatitis B virus(HBV)infection remains a challenging global health problem,with more than 350 million people chronically infected and at risk of developing hepatocellular carcinoma(HCC).Interactions that occur among host,environmental,and viral factors determine the natural course and predict the prognosis of patients with chronic HBV *** the past decades,several important viral factors of predictive of HCC have been identified,such as high hepatitis B surface antigen level,seropositivity of hepatitis B e antigen,high viral load,viral genotype,and specific viral sequence *** of certain viral risk factors for HCC development and stratification of patient risk are very important to perform future surveillance *** this article,we thus reviewed the risk of viral factors involved in hepatocarcinogenesis.

关键词： Hepatitis B virus Hepatocellular carcinoma Mutation Serum hepatitis B virus-DNA levels Genotype

Novel preparation of NaA/carbon nanocomposite thin films with high permeance for CO_2/CH_4 separation

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Chinese Chemical Letters 2007年第4期18卷 455-457页

作者： Zhi Hui Zhou Jian Hua Yang Li feng Chang Yan Zhang Wei guo Sun Jin qu Wang State Key Laboratory of Fine Chemicals Institute of Adsorption and Inorganic Membrane Dalian University of Technology Dalian 116012 PR China

Novel NaA/carbon nanocomposite thin films were successfully prepared on a porous α-Al2O3 substrate by incorporating nanosized NaA zeolite into novolak-type phenolic resin. The prepared films were characterized by XRD, SEM and single gas permeation tests. The NaA zeolite/carbon nanocomposite thin films exhibited that the ideal separation factor of CO2/CH4 was 28.4 and the carbon dioxide flux was 3.39 ×10^-7 mol/（Pa m^2 s） at room temperature and under a pressure difference of 100 kPa, which was two orders of magnitude higher than that of pure carbon membrane prepared at the same procedures and conditions as those of composite films. From the SEM images, the films were continuous and highly intergrown. Compared with carbon membranes, the thickness of nanocomposite films was drastically decreased, which was helpful to reduce the diffusion resistance and increase the flux of gas permeance.

关键词： Nanocomposite Thin films High performance Gas separation

Unrecognized congenital heart disease in rural school-age children:getting to the root of the problem

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World Journal of Pediatrics 2022年第5期18卷 305-307页

作者： qu-Ming Zhao guo-Ying Huang Pediatric Heart Center Children's Hospital of Fudan UniversityNational Children's Medical Center399 Wan Yuan RoadShanghai 201102China Shanghai Key Laboratory of Birth Defects ShanghaiChina

Congenital heart disease(CHD)is an important contributor to morbidity and mortality in children,and the global burden of this illness has raised unique challenges to the healthcare system[1,2].China is among the countries with the highest burden of this disorder despite having achieved huge advances in cardiac surgery or interventional therapies in CHD during the past two decades[3].Interestingly and unexpected is the lower prevalence rate of CHD reported in *** prevalence of CHD at live birth is estimated to be 9.4 per 1000 worldwide[4],However,this figure is much lower in China,with only 4.9 per 1000 live births between 2015 and 2019[5].

关键词： mortality congenital raised

Isolation of a Tomato Protease that May Be Involved in Proteolysis of 1-Aminocyclopropane-l-Carboxylate Synthase

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Journal of Integrative Plant Biology 2005年第10期47卷 1220-1227页

作者： Jian-feng LI Liang-Hu qu Ning LI Key Laboratory of Gene Engineering of the Ministry of Education Zhongshan University Guangzhou 510275 China Department of Biology The Hong Kong University of Science and Technology Clear Water Bay Hong Kong SAR China

1-aminocyclopropane- 1-carboxylate （ACC） synthase is a principal enzyme that catalyses the committed step in phytohormone ethylene biosynthesis. Previous evidence indicates that the hypervariable C-terminus of ACC synthase is most likely to be processed proteolytically in vivo. However, the protease responsible has not been identified thus far. In the present study, we detected proteolytic activity against ACC synthase （LeACS2） in tomato （Lycopersicon esculentum Mill.） fruit extract based on a newly established in vitro assay system. Purification of the protease through DEAE, gel filtration and MonoQ chromatography resulted in considerable enrichment of a 64-kDa protein species. Subsequent biochemical analysis of the purified tomato protease revealed that the optimal conditions for its proteolytic activity were at pH 8.0 and at 37 ~C. In addition, the protease activity was blocked completely by the metalloprotease inhibitor 1,10-phenanthroline. The present study represents the first report on the isolation of an ACC synthase- processing protease from plant tissues.

关键词： 1-aminocyclopropane-1-carboxylate (ACC) synthase biochemical analysis C-terminalproteolysis isolation protease.

Electrochemically and DNA-triggered cell release from ferrocene/β-cyclodextrin and aptamer modified dual- functionalized graphene substrate

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Nano Research 2015年第3期8卷 887-899页

作者： Lingyan feng Wen Li Jinsong Ren Xiaogang qu Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P. R. China University of Chinese Academy of Sciences Beijing 100039 P. R. China

Here we report a dual-functionalized electrochemical substrate to trigger cancer cells release based on the supramolecular interaction between β-cyclodextrin （β-CD） and Fc on clinical trial II aptamer AS1411 functionalized graphene platform. On one hand, the host-guest interaction can be reversible electrochemically controlled to realize cancer cells capture/release, and 1-adamantylamine binding can further amplify this surface change by competing interaction with β-CD. On the other hand, the AS1411 aptamer and its complementary DNA （cDNA） also can be used as a switchable anchor for cell adhesion. Our work gives an example for label-free, multi-functionalized triggered cell release based on aptamer and β-CD/graphene-modified surface and this multi-ways for cell catch-and-release on graphene modified surface also provides their potential biomedical application.

关键词： cell release ferrocene/β-cyclodextrin AS1411 graphene

Periodicity of the solar radius revisited by using empirical mode decomposition and the Lomb–Scargle method

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Research in Astronomy and Astrophysics 2015年第6期15卷 879-888页

作者： Zhi-Ning qu Wen feng Hong-Fei Liang Yunnan Observatories Chinese Academy of Sciences University of Chinese Academy of Sciences Key Laboratory of Solar Activity National Astronomical Observatories CAS Department of Physics School of Science Sichuan University of Science & Engineering Research Center of Analysis and Measurement Kunming University of Science and Technology Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University) Ministry of Education Department of Physics Yunnan Normal University

Using the Hilbert-Huang transform and the Lomb-Scargle method, we investigate periodicities in the daily solar radius data during the time interval from February 1978 to October 1999 derived from Caleru Observatory. The following prominent periods are found：（1） the rotation cycle signal; （2） several mid-term periods including 122, 162.9 and 225 days, annual-variation periodicities （319 and 359 days）, quasi-triennial oscillations （3.46 and 3.94 years）; （3） the 11-year Schwabe cycle, which is in anti-phase with solar activity. This result indicates that the strong magnetic field associated with the Sun has a greater inhibitive effect on the radius variation.

关键词： Sun activity -- Sun solar radius -- Sun photosphere -- Sun data analysis

Attractive fixed-point solution study of a shell model for turbulent convection

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Science China(Physics,Mechanics & Astronomy) 2013年第5期56卷 995-1003页

作者： guo Hao LI Chao qu QiuLin LIU PeiQing Institute of Fluid Mechanics Beihang University Key Laboratory of Fluid Mechanics (Beihang University) Ministry of Education

Different scaling behaviors, such as Kolmogorov (K41) scaling and Bolgiano and Obukhov (BO) scaling, have been reported in various shell models proposed for turbulent thermal convection. However, two coexistent subranges with K41 and BO scaling are not set up with Bolgiano scale interlaying between the largest scale and the dissipation scale. In this paper, we summarize fixed-point solution study of the Brandenburg model with small perturbation theory by introducing a small disturbance term as the impact of buoyancy. Three groups of fixed-point solutions with different locations of the so-called buoyancy scale, above/below which buoyancy is significant/insignifant. Both theoretical and numerical results show that a modified K41 scaling, instead of K41 and BO coexistent scaling, is set up even though buoyancy may be significant over the scaling range, which suggests that the buoyancy scale is not related exactly to the Bolgiano scale. Thus, a K41 and BO coexistent scaling behavior is not setup for the Brandenburg model.

关键词： turbulent convection shell model fixed-point scaling behavior

A study of parameter-free shock capturing upwind schemes on low speeds' issues

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Science China(Technological Sciences) 2014年第6期57卷 1183-1190页

作者： qu feng YAN Chao YU Jian SUN Di National Laboratory for CFD Beihang University

Nowadays,the upwind schemes are in a rapid development to capture shock ***,these upwind schemes’properties at low speeds,such as their reconstruction scheme dependencies,grid dependencies,and Mach number dependencies,are concerned by few *** this paper,a systematic study on their low speeds’issues is *** a series of tests,we can find that most parameter-free upwind schemes,widely used in practice today,are not applicable to low speeds’*** contrast,SLAU and SLAU2 can give reliable ***,the upwind scheme’s influence on the accuracy is stronger than the reconstruction scheme’s influence at low speeds.

关键词： low speeds slau parameter-free reconstruction scheme dependency grid dependency mach number dependency upwind schemes