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| 1 | Underwater explosion in centrifuge partⅠ:Validation and calibration of scaling laws显示文摘Centrifuge is a promising tool for underwater explosion(UNDEX) research as both Mach and Froude similitudes could be satisfied with hyper-gravity in models, which would result in similarities in both shock wave and bubble oscillation. Scaling laws for UNDEX in centrifuge have been proposed based on dimensional analysis. Two dimensionless numbers, i.e.,π_3 and π_4, are used to characterize shock wave and bubble oscillation, respectively. To validate scaling laws, 17 UNDEX tests are designed by varying accelerations or explosive weights and positions in centrifuge. The tests are classified into different groups to validate scaling laws as well as calibrate coefficients in empirical formulae for both shock wave and bubble oscillation. The results show that changes of gravity acceleration or hydrodynamic pressure almost has no influence on shock wave peak pressure and time constant as long as π3 is constant. The dimensionless bubble period and maximum radius agreed with each other when π4 is constant. Based on the research, an example is exhibited to suggest method for the computation of initial loading conditions for a submerged obstacle subjected to UNDEX. | HU Jing CHEN ZuYu ZHANG XueDong WEI YingQi LIANG XiangQian LIANG JianHui MA GuoWei WANG QiuSheng LONG Yuan | 2017 | Science China(Technological Sciences)2017，60，11： | 14 |
| 2 | Fabrication of Fe-POMs as Visible-light-active Heterogeneous Photocatalyst显示文摘Visible-light-active Fe-POMs was fabricated via precipitating Fe^3+with Keggin type polyoxometalates(H:PWi0a.H4SiWi204o or HsPMorOao)under solvothermal condition.The as-prepared Fe-POMs were denoted as FePW.FeSiW and FePMo,respectively.Among the three kinds of Fe-POMs.FePMo displayed the highest visible light absorption,the largest specific surface area,the most sensitive photocurrent response and the smallest charge transfer resistance,which were all beneficial for heterogeneous photocatalysis.The efficiency for Cr(VI)reduction was ca.88%by FePMo after 50 min visible light irradiation.The estimated rate constant(0.042 min^-l)was ca.2.5 and 1.8 times that by FePW and FeSiw.respectively.FTIR spectra indicated that the Keguin structure of PMoOag was maintained inFePMo.Mechanism study indicated that the photogenerated electrons in LUMO and the holes in HOMO were thermo-dynamically feasible for Cr(VI)reduction and H20 oxidation,respectively.Using FePMo as an optimized photocatalyst.good stability was also observed after 5 cvclic runs in both photocatalvtic performance and XRD structure. | CEN Qing XIAO Wei LIU Yingqi WANG Qi NAFADY Ayman MA Shengqian | 2020 | Chemical Research in Chinese Universities2020，36，6： | 1 |
| 3 | Enhanced photocatalytic performance of SrTiO_(3) powder induced by europium dopants显示文摘In this work,Eu^(3+)doped SrTiO_(3)powders were synthesized by sol-gel method and the influences of Eu^(3+)dopants on the crystalline structure,micro structure mo rphology,electronic band-gap and photocatalytic performance for degradation of o rganic pollutant were investigated in detail.Research results reveal that the incorporated Eu^(3+)ions in SrTiO_(3)lattice are preferable to substitute the Sr^(2+)-Ti^(4+)ions pair by two Eu^(3+)ions.The presence of Eu^(3+)ions plays a significant role for the microstructure morphology of the S rTiO_(3)powders,leading to the formation of smaller size nanoparticles with a higher specific surface area.The light absorption capability of the resulting materials is improved owing to the narrowing of the band-gap induced by Eu^(3+)dopants.As a result,the enhanced photocatalytic activity application for photodegradation of Rhodamine B solution is demonstrated for the SrTiO_(3)powders doped with Eu^(3+)ions. | Yingqi Wang Wenqi Ma Yuexin Song Jingjing Chen Jiao Xu Dajian Wang Zhiyong Mao | 2021 | Journal of Rare Earths2021，39，5： | 1 |
| 4 | Regulating off-centering distortion maximizes photoluminescence in halide perovskites显示文摘Metal halide perovskites possess unique atomic and electronic configurations that endow them with high defect tolerance and enable high-performance photovoltaics and optoelectronics.Perovskite light-emitting diodes have achieved an external quantum efficiency of over 20%.Despite tremendous progress,fundamental questions remain,such as how structural distortion affects the optical properties.Addressing their relationships is considerably challenging due to the scarcity of effective diagnostic tools during structural and property tuning as well as the limited tunability achievable by conventional methods.Here,using pressure and chemical methods to regulate the metal off-centering distortion,we demonstrate the giant tunability of photoluminescence(PL)in both the intensity(>20 times)and wavelength(>180 nm/GPa)in the highly distorted halide perovskites[CH_(3)NH_(3)GeI_(3),HC(NH_(2))2GeI_(3),and Cs Ge I_(3)].Using advanced in situ high-pressure probes and first-principles calculations,we quantitatively reveal a universal relationship whereby regulating the level of off-centering distortion towards 0.2 leads to the best PL performance in the halide perovskites.By applying this principle,intense PL can still be induced by substituting CH_(3)NH_(3)^(+)with Cs^(+)to control the distortion in(CH_(3)NH_(3))_(1-x)Cs_(x)GeI_(3),where the chemical substitution plays a similar role as external pressure.The compression of a fully substituted sample of CsGe I_(3)further tunes the distortion to the optimal value at 0.7 GPa,which maximizes the emission with a10-fold enhancement.This work not only demonstrates a quantitative relationship between structural distortion and PL property of the halide perovskites but also illustrates the use of knowledge gained from high-pressure research to achieve the desired properties by ambient methods. | Xujie Lv Constantinos Stoumpos Qingyang Hu Xuedan Ma Dongzhou Zhang Songhao Guo Justin Hoffman Kejun Bu Xiaofeng Guo Yingqi Wang Cheng Ji Haijie Chen Hongwu Xu Quanxi Jia Wenge Yang Mercouri G.Kanatzidis Ho-Kwang Mao | 2021 | National Science Review2021，8，9： | 1 |
| 5 | Trends Analysis of Graphene Research and Development显示文摘Purpose: This study aims to reveal the landscape and trends of graphene research in the world by using data from Chemical Abstracts Service(CAS). Design/methodology/approach: Index data from CAS have been retrieved on 78,756 papers and 23,057 patents on graphene from 1985 to March 2016, and scientometric methods were used to analyze the growth and distribution of R&D output, topic distribution and evolution, and distribution and evolution of substance properties and roles.Findings: In recent years R&D in graphene keeps in rapid growth, while China, South Korea and United States are the largest producers in research but China is relatively weak in patent applications in other countries. Research topics in graphene are continuously expanding from mechanical, material, and electrical properties to a diverse range of application areas such as batteries, capacitors, semiconductors, and sensors devices. The roles of emerging substances are increasing in Preparation and Biological Study. More techniques have been included to improve the preparation processes and applications of graphene in various fields.Research limitations: Only data from CAS is used and some R&D activities solely reported through other channels may be missed. Also more detailed analysis need to be done to reveal the impact of research on development or vice verse, development dynamics among the players, and impact of emerging terms or substance roles on research and technology development.Practical implications: This will provide a valuable reference for scientists and developers, R&D managers, R&D policy makers, industrial and business investers to understand the landscape and trends of graphene research. Its methodologies can be applied to other fields or with data from other similar sources.Originality/value: The integrative use of indexing data on papers and patents of CAS and the systematic exploration of the distribution trends in output, topics, substance roles are distinctive and insightful. | Lixue Zou Li Wang Yingqi Wu Caroline Ma Sunny Yu Xiwen Liu | 2018 | Journal of Data and Information Science2018，3，1： | 0 |
| 6 | Comparison of single-event upset generated by heavy ion and pulsed laser显示文摘Single-event upset(SEU) is investigated using heavy ion and pulsed laser. The measured SEU cross sections of D and DICE flip-flops are compared. Measurement results indicate pulsed laser is capable of inducing similar SEU to those induced by heavy ion. 3D-TCAD simulation is performed to investigate the factors to impact pulsed laser induced SEU. Simulation results show that the beam spot size significantly impacts SEU cross sections in both low and high laser energy while the variation of the equivalent LET only impacts SEU cross sections in the low laser energy. | Bin LIANG Ruiqiang SONG Jianwei HAN Yaqing CHI Rui CHEN Chunmei HU Jianjun CHEN Yingqi MA Shipeng SHANGGUAN | 2017 | Science China(Information Sciences)2017，60，7： | 0 |
| 7 | Biofunctionalized semiconductor quantum dots for virus detection显示文摘Virus is a kind of microorganism and possesses simple structure and contains one nucleic acid,which must be replicated using the host cell system.It causes large-scale infectious diseases and poses serious threats to the health,social well-being,and economic conditions of millions of people worldwide.Therefore,there is an urgent need to develop novel strategies for accurate diagnosis of virus infection to prevent disease transmission.Quantum dots(QDs)are typical fluorescence nanomaterials with high quantum yield,broad absorbance range,narrow and size-dependent emission,and good stability.QDs-based nanotechnology has been found to be effective method with rapid response,easy operation,high sensitivity,and good specificity,and has been widely applied for the detection of different viruses.However,until now,no systematic and critical review has been published on this important research area.Hence,in this review,we aim to provide a comprehensive coverage of various QDs-based virus detection methods.The fundamental investigations have been reviewed,including information related to the synthesis and biofunctionalization of QDs,QDs-based viral nucleic acid detection strategies,and QDs-based immunoassays.The challenges and perspectives regarding the potential application of QDs for virus detection is also discussed. | Yingqi Liang Guobin Mao Junbiao Dai Yingxin Ma | 2023 | Journal of Semiconductors2023，44，2： | 0 |
| 8 | Layer-by-layer self-assembly and clinical application in orthopedics显示文摘Orthopedic implants for the treatment of bone defects from various causes have been challenged by insufficient osseointegration,bacterial infection,oxidative stress,immune rejection,and insufficient individualized treatment.These challenges not only impact treatment outcomes but also severely impact patients’daily lives.Layer-by-Layer(LbL)serves as a simple surface coating technique,in simple terms,to functionalize implants by sequentially adsorbing oppositely charged materials onto a substrate.In orthopaedics,LbL self-assembly technology solves some of the challenges by loading various drugs or biological agents on the implant surface and controlling their release precisely to the site of bone defects in a personalized way.This review will introduce the basic principle and the development of LbL in orthopaedics,review and analyze the chemical strategy of LbL in the preparation of bone implants to ensure the stability of the implant,and introduce the use of LbL bone implants in orthopaedics in recent years.The application of LbL includes the realization of programmed drug delivery and sustained release,thereby promoting osseointegration and the formation of new blood vessels,antibacterial,antioxidant,etc.This review focuses on the LbL technology,involving the technology selection for the preparation of bone implants,the chemical strategies of the stability guarantee of LbL implants,the pharmacological properties,loading and release mechanisms of loaded drugs,and the molecular mechanisms of osteogenesis and angiogenesis.The aim of this review is to provide an overview of current research advances,and a prospect in this field was also described. | Xiao Ma Duoyi Zhao Yubo Xiang Yingqi Hua Wei Zhao Yan Cui Zhiyu Zhang | 2023 | Journal of Materials Science & Technology2023，，16： | 0 |
| 9 | Bioinformatics exploration of potential common therapeutic targets for systemic and pulmonary arterial hypertension-induced myocardial hypertrophy显示文摘Systemic and pulmonary arterial hypertension(PAH)can induce left and right ventricular hypertrophy,respectively,but common therapeutic targets for both left and right hypertrophy are limited.In this study,we attempt to explore potential common therapeutic targets and screen out potential target drugs for further study.Cardiac mRNA expression profiles in mice with transverse aortic constriction(TAC)and pulmonary arterial constriction(PAC)are obtained from online databases.After bioinformatics analyses,we generate TAC and PAC mouse models to validate the phenotypes of cardiac remodelling as well as the identified hub genes.Bioinformatics analyses show that there are 214 independent differentially expressed genes(DEGs)in GSE136308(TAC related)and 2607 independent DEGs in GSE30922(PAC related),while 547 shared DEGs are associated with the function of the extracellular matrix(ECM)or involved in the PI3K-Akt signaling pathway,cytokine-cytokine receptor interactions,and ECM-receptor interactions.We identifyd Fn1,Il6,Col1a1,Igf1,Col1a2,Timp1,Col3a1,Cd44,Ctgf and Postn as hub genes of the shared DEGs,and most of them are associated with myocardial fibrosis.Those hub genes and phenotypes of cardiac remodelling are validated in our TAC and PAC mouse models.Furthermore,we identify dehydroisoandrosterone(DHEA),iloprost and 4,5-dianilinophthalimide(DAPH)as potential therapeutic drugs targeting both left and right ventricular hypertrophy and validate the effect of DHEA.These findings suggest that DHEA could be an effective drug for pressure overload-induced left or right ventricular hypertrophy by regulating the shared hub differentially expressed genes associated with fibrosis. | Lu Chen Mingjue Li Mengjia Shen Yingqi Zhu Kaitong Chen Xiaoxia Huang Cankun Zheng Qiancheng Wang Hairuo Lin Wangjun Liao Jianping Bin Siyuan Ma Yulin Liao | 2023 | Acta Biochimica et Biophysica Sinica2023，55，5： | 0 |
| 10 | Dl-3-butylphthalide-enhanced hematopoietic stem cell transplantation and endogenous stem cell mobilization for the treatment of cerebral infarcts显示文摘Exogenous stem cell transplantation and endogenous stem cell mobilization are both effective for the treatment of acute cerebral infarction. The compound dl-3-butylphthalide is known to improve microcirculation and help brain cells at the infarct loci. This experiment aimed to investigate the effects of dl-3-butylphthalide intervention based on the transplantation of hematopoietic stem cells and mobilization of endogenous stem cells in a rat model of cerebral infarction, following middle cerebral artery occlusion. Results showed that neurological function was greatly improved and infarct volume was reduced in rats with cerebral infarction. Data also showed that dl-3-butylphthalide can promote hematopoietic stem cells to transform into vascular endothelial cells and neuronal-like cells, and also enhance the therapeutic effect on cerebral infarction by hematopoietic stem cell transplantation and endogenous stem cell mobilization. | Baoquan Lu Xiaoming Shang Yongqiu Li Hongying Ma Chunqin Liu Jianmin Li Yingqi Zhang Shaoxin Yao | 2011 | Neural Regeneration Research2011，6，7： | 0 |
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