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Abnormal thermal conductivity enhancement in covalently bonded bilayer borophene allotrope

Nano Research 2022年第4期15卷 3818-3824页

作者： Yan Yin Yanxiao Hu shichang li Guangqian Ding Shifa Wang Dengfeng li Gang Zhang School of Science Chongqing University of Posts and TelecommunicationsChongqing 400065China Chongqing Key Laboratory of Geological Environment Monitoring and Disaster Early-warning in Three Gorges Reservoir Area Chongqing Three Gorges UniversityChongqing 404000China Institute of High Performance Computing A*STARSingapore 138632Singapore

Thermal conductivity of two-dimensional(2D)materials has gained prominence due to the attractive applications in thermal management and thermoelectric *** this work,we present a new member of bilayer 2D boron allotropes,denoted as bilayerβ12 borophene,and study the thermal transport properties by solving phonon Boltzmann transport equation based on density functional *** on quantitative chemical bonding analysis,we identify large degrees of covalent bonding of the interlayer *** comparison to its monolayer counterpart,the bilayer exhibits much higher in-plane thermal conductivity despite the lower phonon group velocity and buckling structure,inferring a new physical *** thermal conductivity(κ)of bilayerβ_(12)borophene at 300 K is 140.5(86.3)W·m^(-1)·K^(-1)along armchair(zigzag)direction,andκ_(armchair)is about 52.7%higher than that of monolayerβ12 *** abnormal enhancement is attributed to the suppressed phonon scattering possibility and elongation of phonon *** interesting,after forming bilayerβ12 borophene through interlayer covalent bonding,the dominated phonon branch to thermal conductivity changes to transverse acoustic phonons from out-of-plane flexural acoustic(ZA)phonons in the monolayer *** study elucidates the rich thermal transport characteristics in bilayer covalently bonded 2D materials,and injects fresh insights into the phonon engineering of 2D borophene relevant for emergent thermal management applications.

关键词： theory conductivity phonon

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Developmental toxicity assessment of neonicotinoids and organophosphate esters with a human embryonic stem cell-and metabolism-based fast-screening model

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Journal of Environmental Sciences 2024年第3期137卷 370-381页

作者： Shuxian Zhang Miaomiao Zhao shichang li Renjun Yang Nuoya Yin Francesco Faiola State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China

In recent years,neonicotinoids(NEOs)and organophosphate esters(OPEs)have been widely used as substitutes for traditional pesticides and brominated fame-retardants,*** studies have shown that those compounds can be frequently detected in environmental and human samples,are able to penetrate the placental barrier,and are toxic to ***,it is reasonable to speculate that NEOs and OPEs may have potential adverse effects in humans,especially during *** employed a human embryonic stem cell differentiation-and liver S9 fraction metabolism-based fast screening model to assess the potential embryonic toxicity of those two types of *** show that four NEO and five OPE prototypes targeted mostly ectoderm specification,as neural ectoderm and neural crest genes were down-regulated,and surface ectoderm and placode markers *** liver S9 fraction's treatment could generally reduce the effects of the chemicals,except in a few specific instances,indicating the liver may detoxify NEOs and *** findings suggest that NEOs and OPEs interfere with human early embryonic development.

关键词： Neonicotinoids Organophosphate esters Human embryonic stem cells Fast screening model Developmental toxicity

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Radical-scavenging activities of marine-derived xyloketals and related chromanes

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Acta Pharmaceutica Sinica B 2013年第5期3卷 322-327页

作者： Zhongliang Xu Bingtai Lu Qi Xiang Yiying li shichang li Yongcheng lin Jiyan Pang School of Chemistry&Chemical Engineering Sun Yat-Sen UniversityGuangzhou 510275China Biopharmaceutical R&D Center Jinan UniversityGuangzhou 510632China

Xyloketals,a new type of antioxidants from a marine mangrove fungus,have potential pharmacological *** this paper,the radical-scavenging activities of a series of synthetic xyloketals and related chromanes toward 2,2-diphenyl-1-picrylhydrazyl(DPPH)and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)(ABTS)were evaluated by absorption *** of the compounds(compound 10)displayed significant antioxidative action against DPPH and ABTS.A structure-activity analysis showed that the reactive sites on these compounds correlated with a hydroxygroup and also with ketal or aromatic H *** in part on a density functional theory(DFT)calculation of compound 10,the antioxidant mechanism of this chromane was deduced as a possible radical-scavenging mechanism by a sequential proton loss electron-transfer(SPLET)process.

关键词： Xyloketals Radical scavenging activities DFT SPLET

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Pressure-dependent electronic,optical,and mechanical properties of antiperovskite X_(3)NP(X=Ca,Mg):A first-principles study

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Journal of Semiconductors 2023年第10期44卷 52-60页

作者： Chunbao Feng Changhe Wu Xin Luo Tao Hu Fanchuan Chen shichang li Shengnan Duan Wenjie Hou Dengfeng li Gang Tang Gang Zhang School of Science Chongqing University of Posts and TelecommunicationsChongqing 400065China Institute for Advanced Sciences Chongqing University of Posts and TelecommunicationsChongqing 400065China School of Computer Science and Technology Northwestern Polytechnical UniversityXi’an 710129China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China Institute of High Performance Computing A*STAR138632Singapore

Hydrostatic pressure provides an efficient way to tune and optimize the properties of solid materials without chang-ing their *** this work,we investigate the electronic,optical,and mechanical properties of antiperovskite X_(3)NP(X^(2+)=Ca,Mg)upon compression by first-principles *** results reveal that the system is anisotropic,and the lat-tice constant a of X_(3)NP exhibits the fastest rate of decrease upon compression among the three directions,which is different from the typical Pnma phase of halide and chalcogenide ***,Ca_(3)NP has higher compressibility than Mg_(3)NP due to its small bulk *** electronic and optical properties of Mg_(3)NP show small fluctuations upon compression,but those of Ca_(3)NP are more sensitive to pressure due to its higher compressibility and lower unoccupied 3d orbital *** example,the band gap,lattice dielectric constant,and exciton binding energy of Ca_(3)NP decrease rapidly as the pressure *** addition,the increase in pressure significantly improves the optical absorption and theoretical conversion effi-ciency of Ca_(3)***,the mechanical properties of X_(3)NP are also increased upon compression due to the reduction in bond length,while inducing a brittle-to-ductile *** research provides theoretical guidance and insights for future experi-mental tuning of the physical properties of antiperovskite semiconductors by pressure.

关键词： antiperovskite hydrostatic pressure physical properties first-principles calculations

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Globalization and the Formation of Socialism with Chinese Characteristics

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Social Sciences in China 2002年第3期23卷 106-111页

作者： Song shichang li Ronghai

20世纪七八十年代,在内外因素的冲击下,世界社会主义运动陷于低潮,产生了转换发展模式与战略的内在要求。作为中国共产党第二代领导集体的核心人物,邓小平以马克思主义政治家的视野关注世界风云变幻,关注社会主义的前途命运。他在历史... 详细信息

20世纪七八十年代,在内外因素的冲击下,世界社会主义运动陷于低潮,产生了转换发展模式与战略的内在要求。作为中国共产党第二代领导集体的核心人物,邓小平以马克思主义政治家的视野关注世界风云变幻,关注社会主义的前途命运。他在历史与现实、世界与中国、马克思主义与当代社会主义实践的比较、互动、结合中,把中国社会主义发展的目标和途径置于全球化发展的时空背景中加以审视和提炼,考虑中国的命运,设计中国的未来,从而创造性地形成了建设有中国特色社会主义的理论与实践。

关键词：内在要求历史与现实理论与实践政治家马克思主义第二代领导集体世界社会主义运动八十年代中国共产党发展模式

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Enhanced genome editing to ameliorate a genetic metabolic liver disease through co-delivery of adeno-associated virus receptor

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Science China(life Sciences) 2022年第4期65卷 718-730页

作者： Shuming Yin lie Ma Tingting Shao Mei Zhang Yuting Guan liren Wang Yaqiang Hu Xi Chen Honghui Han Nan Shen Wenjuan Qiu Hongquan Geng Yongguo Yu shichang li Weishi Yu Mingyao liu Dali li Shanghai Key Laboratory of Regulatory Biology Institute of Biomedical Sciences and School of Life SciencesEast China Normal UniversityShanghai200241China Bioray Laboratories Inc. Shanghai200241China Xinhua Hospital Shanghai Jiao Tong University School of MedicineShanghai200092China College of Physical Education and Health East China Normal UniversityShanghai200241China Key Laboratory of Adolescent Health Assessment and Exercise Intervention Ministry of EducationCollege of Physical Education and HealthEast China Normal UniversityShanghai200241China CIPHER GENE LLC Beijing100089China

Genome editing through adeno-associated viral(AAV) vectors is a promising gene therapy strategy for various diseases,especially genetic disorders. However, homologous recombination(HR) efficiency is extremely low in adult animal models. We assumed that increasing AAV transduction efficiency could increase genome editing activity, especially HR efficiency, for in vivo gene therapy. Firstly, a mouse phenylketonuria(PKU) model carrying a pathogenic R408W mutation in phenylalanine hydroxylase(Pah) was generated. Through co-delivery of the general AAV receptor(AAVR), we found that AAVR could dramatically increase AAV transduction efficiency in vitro and in vivo. Furthermore, co-delivery of SaCas9/sgRNA/donor templates with AAVR via AAV8 vectors increased indel rate over 2-fold and HR rate over 15-fold for the correction of the single mutation in Pah;mice. Moreover, AAVR co-injection successfully increased the site-specific insertion rate of a 1.4 kb Pah cDNA by 11-fold, bringing the HR rate up to 7.3% without detectable global off-target effects. Insertion of Pah cDNA significantly decreased the Phe level and ameliorated PKU symptoms. This study demonstrates a novel strategy to dramatically increase AAV transduction which substantially enhanced in vivo genome editing efficiency in adult animal models, showing clinical potential for both conventional and genome editing-based gene therapy.

关键词： CRISPR/Cas9 gene therapy adeno-associated virus(AAV) AAVR Pah PKU

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不同拼装方式的TRC永久性模板组合柱轴压性能试验研究

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建筑结构学报 2020年第S1期41卷 145-153页

作者：李世昌尹世平中国矿业大学江苏省土木工程环境灾变与结构可靠度重点实验室江苏徐州221116 中国矿业大学深部岩土力学与地下工程国家重点实验室江苏徐州221116

为研究TRC永久性模板的装配性能,设计了高强膨胀灌浆料、螺栓、环氧树脂砂浆以及螺栓和高强膨胀灌浆料相结合4种不同拼装方式的TRC永久性模板组合柱试件,通过轴心受压试验研究了该类组合柱的受力性能。结果表明:与素混凝土柱相比,TRC拼... 详细信息

为研究TRC永久性模板的装配性能,设计了高强膨胀灌浆料、螺栓、环氧树脂砂浆以及螺栓和高强膨胀灌浆料相结合4种不同拼装方式的TRC永久性模板组合柱试件,通过轴心受压试验研究了该类组合柱的受力性能。结果表明:与素混凝土柱相比,TRC拼装永久性模板组合柱在破坏过程中展现出更好的控裂性能并且能够改善混凝土柱的裂缝开展模式;当采用螺栓和高强膨胀灌浆料相结合的方式进行拼装TRC永久性模板时,其轴心受压承载力最高,延性更好;与采用高强膨胀灌浆料进行TRC永久性模板拼装相比,采用螺栓和环氧树脂砂浆拼装时组合柱的承载力较高;与仅采用环氧树脂砂浆拼装相比,采用螺栓拼装时其对于核心混凝土的约束效果更强。最后,提出了TRC永久性模板组合柱轴压承载力理论计算公式,将试验值与理论值进行对比,验证了该理论计算公式的适用性。

关键词：组合柱 TRC永久性模板拼装方式静力试验轴心受压承载力计算公式

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Perfect light absorption in monolayer MoS;empowered by optical Tamm states

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Chinese Optics Letters 2021年第10期19卷 103-108页

作者： Yangwu li Hua Lu Jiadeng Zheng shichang li Xiao Xuan Jianlin Zhao MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions Key Laboratory of Light-Field Manipulation and Information AcquisitionMinistry of Industry and Information Technologyand Shaanxi Key Laboratory of Optical Information TechnologySchool of Physical Science and TechnologyNorthwestern Polytechnical UniversityXi'an 710129China

We present the perfect light absorption of monolayer molybdenum disulfide(MoS_(2))in a dielectric multilayer system with two different Bragg *** results show that the strong absorption of visible light in monolayer MoS_(2) is attributed to the formation of optical Tamm states(OTSs)between two Bragg *** MoS_(2) absorption spectrum is dependent on the layer thickness of Bragg mirrors,incident angle of light,and the period numbers of Bragg ***,the nearly perfect light absorption(99.4%)of monolayer MoS_(2) can be achieved by choosing proper period numbers,which is well analyzed by the temporal coupled-mode theory.

关键词： optical Tamm states molybdenum disulfide light absorption

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Racial Differences in Left Ventricular Filling Pressure Following Acute Aerobic Exercise Between Chinese and Caucasians

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Journal of Science in Sport and Exercise 2022年第3期4卷 275-282页

作者： Peng Sun Huimin Yan Sushant M.Ranadive Abbi D.Lane Rebecca MKappus Tracy Baynard Xiaodan Sun shichang li Bo Fernhall Key Laboratory of Adolescent Health Assessment and Exercise Intervention Ministry of EducationEast China Normal UniversityShanghaiPeople’s Republic of China College of Applied Health Sciences University of Illinois at ChicagoChicagoILUSA Department of Kinesiology and Community Health University of Illinois at Urbana-ChampaignChampaignILUSA Damujia Central Health Center WeifangShandongPeople’s Republic of China

Background Left ventricular filling pressure(LVFP)is an important early indicator of heart failure that is more prevalent in Caucasians than ***-induced change in LVFP may provide more incremental information to assess dias-tolic *** it was unknown whether there was difference in LVFP following acute exercise between Caucasians and *** The purpose of this study was to investigate the change of LVFP following an acute 45-min aerobic exercise in healthy Caucasian and Chinese *** Sixty participants(30 Caucasians and 30 Chinese,half was male,respectively)performed an acute bout of aero-bic exercise at 70%of heart rate ***,Left ventricle(LV)morphology and function parameters were measured at baseline,then at 30-min and 60-min *** There was a similar LV ejection fraction,LV fraction shorten,lateral E/eʹand lateral eʹbetween Chinese and Caucasians at *** was a significant race-by-time interaction in lateral E/eʹand lateral eʹbetween Chinese and Caucasians from pre-exercise to 30 min and 60 min after acute aerobic ***ΔE/eʹwas significant correlated with baseline systolic blood *** The change of LVFP was different between Chinese and Caucasians following acute aerobic *** racial differences may be primarily caused by the changes of LV relaxation following exercise,baseline systolic blood pressure may also contribute to the differences.

关键词： Diastolic function Left ventricular filling pressure Racial differences

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Clue to a thorough understanding of terahertz pulse generation by femtosecond laser filamentation

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Photonics Research 2018年第4期6卷 296-306页

作者： JIAYU ZHAO WEIWEI liU shichang li DAN LU YIZHU ZHANG YAN PENG YIMING ZHU SONGliN ZHUANG Shanghai Key Laboratory of Modern Optical Systems College of Optics and Electronic Information Engineering University of Shanghai for Science and Technology Shanghai 200093 China Institute of Modern Optics Key Laboratory of Optical Information Science and Technology Ministry of Education Nankai University Tianjin 300071 China Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201210 China

In this work, it has been demonstrated that in order to fully understand the terahertz(THz) pulse generation process during femtosecond laser filamentation, the interaction between THz wave and air plasma has to be taken into account. This interaction is mainly associated with the spatial confinement of the THz pulse by the plasma column, which could be described by the one-dimensional negative dielectric(1DND) waveguide model. By combining the 1 DND model with the conventional four-wave mixing(4WM) and photocurrent(PC) models,the variation of THz spectral amplitude and width obtained in experiments could be better understood. Finally, a three-step procedure, with 1DND bridging 4WM and PC processes, has been established for the first time to describe the underlying mechanism of THz radiation from plasma sources.

关键词：太赫兹脉冲技术发展现状通讯技术

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