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Integrating Homogeneous and Heterogeneous Catalysis in a Copper Nanocluster with Lewis Acid–Base Sites for Chemical Conversion of CO_(2) and Propargylamine

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CCS Chemistry 2024年第9期6卷 2131-2141页

作者： Wan-Zhen qiao yu-Jue Wang Si Li Rui Wang Jie Wu Shuang-Quan Zang Henan Key Laboratory of Crystalline Molecular Functional Materials Henan International Joint Laboratory of Tumor Theranostical Cluster MaterialsGreen Catalysis and College of ChemistryZhengzhou UniversityZhengzhou 450001

It remains a significant challenge to develop a catalyst that merges the advantages of homogeneous and heterogeneous catalysis with high reactivity and great ***,an atomically precise Cu_(6)-NH_(2) nanocluster with distorted octahedral Cu_(6) core and NH_(2)-functionalized ligands has been developed as the first homo/heterogeneous catalyst to catalyze the cyclization reaction of propargylic amines with carbon dioxide(CO_(2))under mild *** a homogeneous catalyst,Cu_(6)-NH_(2) shows excellent catalytic activity with high turnover frequency due to highly accessible active *** definite coordination geometry and homogeneity nature of active centers make it convenient to investigate the structure–activity relationship at the atomic level through experiments and theory *** addition,the nanocluster exhibits excellent stability,great recrystallizability,and reusability in five catalytic cycles,in which its catalytic performance has no obvious ***,Cu_(6)-NH_(2) incorporates Lewis acid and base sites in metal and ligand,respectively,which can promote catalytic efficiency in a synergistic effect in the absence of any ***,Cu_(6)-NH_(2) can realize direct conversion of CO_(2) in simulated flue gas into oxazolidinones with high *** metal-ligand cooperative effect and integrated advantages of homogeneous and heterogeneous catalysis would provide new perspectives to achieve advanced metal nanocluster catalysts for CO_(2) conversion.

关键词： copper nanocluster atomically precise structure Lewis acid-base sites CO_(2)cyclization reaction cocatalyst-free

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Mitophagy and cGAS-STING crosstalk in neuroinflammation

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Acta Pharmaceutica Sinica B 2024年第8期14卷 3327-3361页

作者： Xiaogang Zhou Jing Wang Lu yu Gan qiao Dalian Qin Betty yuen-Kwan Law Fang Ren Jianming Wu Anguo Wu Sichuan Key Medical Laboratory of New Drug Discovery and Drugability Evaluation Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia MedicaKey Laboratory of Medical Electrophysiology of Ministry of EducationSchool of PharmacySouthwest Medical UniversityLuzhou 646000China State Key Laboratory of Quality Research in Chinese Medicine Macao University of Science and TechnologyMacao SAR 999078China Chongqing Key Laboratory of Sichuan-Chongqing Co-construction for Diagnosis and Treatment of Infectious Diseases Integrated Traditional Chinese and Western Medicine Chongqing Traditional Chinese Medicine HospitalChongqing 400021China

Mitophagy,essential for mitochondrial health,selectively degrades damaged *** is intricately linked to the cGAS-STING pathway,which is crucial for innate *** pathway responds to mitochondrial DNA and is associated with cellular stress *** review explores the molecular details and regulatory mechanisms of mitophagy and the cGAS-STING *** critically evaluate the literature demonstrating how dysfunctional mitophagy leads to neuroinflammatory conditions,primarily through the accumulation of damaged mitochondria,which activates the cGAS-STING *** activation prompts the production of pro-inflammatory cytokines,exacerbating *** review emphasizes the interaction between mitophagy and the cGAS-STING *** mitophagy may suppress the cGAS-STING pathway,offering protection against ***,impaired mitophagy may activate the cGAS-STING pathway,leading to chronic ***,we explored how this interaction influences neurodegenerative disorders,suggesting a common mechanism underlying these *** conclusion,there is a need for additional targeted research to unravel the complexities of mitophagy-cGAS-STING interactions and their role in *** review highlights potential therapies targeting these pathways,potentially leading to new treatments for neuroinflammatory and neurodegenerative *** synthesis enhances our understanding of the cellular and molecular foundations of neuroinflammation and opens new therapeutic avenues for neurodegenerative disease research.

关键词： Neuroinflammation Mitophagy cGAS-STING Innate immunity Mitochondrial DNA Crosstalk Therapeutic avenues Neurodegenerative diseases

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Self-Assembly of Bacteria in Alternating-Current Electric Fields

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Chinese Physics Letters 2024年第10期41卷 137-143页

作者： Yan-Ran Li Yi-Wu Zong Hong Zhang Jing-Chao Zhang Chun-Ying Feng Jian-Jun qiao Hao Song kun Zhao Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering(Ministry of Education) School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Petrochemical Research Institute of Petrochina Co. Ltd.Beijing 102206China Center for Medical Genetics Sichuan Provincial People’s HospitalUniversity of Electronic Science and Technology of ChinaChengdu 611731China Jiangsu Key Laboratory of Sericultural and Animal Biotechnology School of BiotechnologyJiangsu University of Science and TechnologyZhenjiang 212100China Key Laboratory of Silkworm and Mulberry Genetic Improvement Ministry of Agriculture and Rural AffairsSericultural Scientific Research CenterChinese Academy of Agricultural SciencesZhenjiang 212100China Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072China The Sichuan Provincial Key Laboratory for Human Disease Gene Study and The Institute of Laboratory Medicine Sichuan Provincial People’s HospitalUniversity of Electronic Science and Technology of ChinaChengdu 610054China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China

Self-assembly of bacteria in electric fields is a promising route to fabricate biomaterials with reversible and specific ***,due to relatively less studies,our understanding of the self-assembly of bacteria in electric fields is still ***,how different bacterial species behave differently in their fieldmediated self-assembly behavior remains to be *** this study,we choose four bacterial species,including Shewanella oneidensis,Pseudomonas aeruginosa,Bacillus subtilis and Lactococcus lactis as model systems,and investigate their self-assembly behavior in alternating-current(AC)electric fields for both diluted and concentrated *** phase diagrams in the plane of applied field strength vs frequency are *** results show that in diluted suspensions,a transition sequence of isotropic–paranematic–string–columnar phases is observed in all strains as the field strength *** of the assembled structures are quantitatively differentiated among different *** concentrated suspensions,besides the isotropic and paranematic phases,a higher ordered phase with interdigitating rectangular crystal domains(OIR)and an ordered phase with smectic A liquid crystal domains are observed for *** and ***,*** findings shed new light on fabricating potential biomaterials by assembling cells of appropriately chosen bacterial species that have desired surface properties under AC electric fields.

关键词： suspensions diluted biomaterials

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Modulating the alloying mode in the doping-induced synthesis of Au-Pd nanowires

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Nano Research 2024年第4期17卷 3334-3343页

作者： Hui Jin Xiaoliang Wei Lecheng Zhao Jialong yu qiao Pan Shumin Li Qian Wang Zhaotong yuan Dan Yang Donghui Zhao Hongyu Chen Yawen Wang Institute of Advanced Synthesis School of Chemistry and Molecular EngineeringJiangsu National Synergistic Innovation Center for Advanced MaterialsNanjing Tech UniversityNanjing 211816China School of Science Westlake UniversityHangzhou 310064China Institute of Natural Sciences Westlake Institute for Advanced StudyHangzhou 310064China

Heterogeneous doping is one effective strategy for synthesizing metal alloy ***,the heterogeneous doping processes of Pd on the ultrathin Au nanowires were systematically modulated and ***-Pd alloy nanowires with various morphologies and lattice structures can be obtained by adjusting the morphology of the precursor Au nanowires and the kinetics of the heterogeneous doping *** effects of the rate of Pd reduction and the concentration of the ligand oleylamine(OAm)on the Pd deposition and alloying mode were ***,as the Pd deposition rate decreases,the Pd deposition and alloying mode switches from the island-forming Stransky–Krastanov(SK)mode to the epitaxial Frank-van der Merwe(FM)mode,and eventually to an unconventional twisting alloying mode,where the interdiffusion of Pd and Au causes drastic rearrangement of the lattice structure and formation of helical *** kinetics-related variation of alloying mode could also be observed in the Au-Ag nanowires,demonstrating a general design principle for the synthesis of alloy *** addition,the electrocatalytic performance of various Au-Pd nanowires was evaluated,and the alloy nanowire formed via the SK mode was found to be an excellent electrocatalyst for oxygen reduction and ethanol oxidation.

关键词： gold nanowires Au-Pd alloy oleylamine post-synthetic modification

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Study of inter-well interference in shale gas reservoirs by a robust production data analysis method based on deconvolution

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Petroleum Science 2024年第4期21卷 2502-2519页

作者： Wen-Chao Liu Cheng-Cheng qiao Ping Wang Wen-Song Huang Xiang-Wen Kong yu-Ping Sun He-Dong Sun yue-Peng Jia School of Civil and Resource Engineering University of Science and Technology Beijing PetroChina Research Institute of Petroleum Exploration and Development

In order to overcome the defects that the analysis of multi-well typical curves of shale gas reservoirs is rarely applied to engineering, this study proposes a robust production data analysis method based on deconvolution, which is used for multi-well inter-well interference research. In this study, a multi-well conceptual trilinear seepage model for multi-stage fractured horizontal wells was established, and its Laplace solutions under two different outer boundary conditions were obtained. Then, an improved pressure deconvolution algorithm was used to normalize the scattered production data. Furthermore, the typical curve fitting was carried out using the production data and the seepage model solution. Finally,some reservoir parameters and fracturing parameters were interpreted, and the intensity of inter-well interference was compared. The effectiveness of the method was verified by analyzing the production dynamic data of six shale gas wells in Duvernay area. The results showed that the fitting effect of typical curves was greatly improved due to the mutual restriction between deconvolution calculation parameter debugging and seepage model parameter debugging. Besides, by using the morphological characteristics of the log-log typical curves and the time corresponding to the intersection point of the log-log typical curves of two models under different outer boundary conditions, the strength of the interference between wells on the same well platform was well judged. This work can provide a reference for the optimization of well spacing and hydraulic fracturing measures for shale gas wells.

关键词： Shale gas Inter-well interference Deconvolution Production data analysis Typical curves Multi-stage fractured horizontal well

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Double stabilizations and convergence analysis of a second-order linear numerical scheme for the nonlocal Cahn-Hilliard equation

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Science China Mathematics 2024年第1期67卷 187-210页

作者： Xiao Li Zhonghua qiao Cheng Wang Department of Applied Mathematics The Hong Kong Polytechnic UniversityHong KongChina Department of Mathematics The University of MassachusettsNorth DartmouthMA 02747USA

In this paper,we study a second-order accurate and linear numerical scheme for the nonlocal CahnHilliard *** scheme is established by combining a modified Crank-Nicolson approximation and the Adams-Bashforth extrapolation for the temporal discretization,and by applying the Fourier spectral collocation to the spatial *** addition,two stabilization terms in different forms are added for the sake of the numerical *** conduct a complete convergence analysis by using the higher-order consistency estimate for the numerical scheme,combined with the rough error estimate and the refined *** regarding the numerical solution as a small perturbation of the exact solution,we are able to justify the discrete?^(∞)bound of the numerical solution,as a result of the rough error ***,the refined error estimate is derived to obtain the optimal rate of convergence,following the established?∞bound of the numerical ***,the energy stability is also rigorously proved with respect to a modified *** proposed scheme can be viewed as the generalization of the second-order scheme presented in an earlier work,and the energy stability estimate has greatly improved the corresponding result therein.

关键词： nonlocal Cahn-Hilliard equation second-order stabilized scheme higher-order consistency analysis rough and refined error estimate

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V0405 Dra:A New Deep and Low Mass Ratio Contact Binary with Extremely Fast Decrease in the Orbital Period

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Research in Astronomy and Astrophysics 2024年第6期24卷 287-293页

作者： Chao-yue Li Lin-qiao Jiang Jie Zheng Yi-Man Liu Xiao-yu Long Min Sun Han-Lu Zhang Xiao-Man Tian School of Science Leshan Normal UniversityLeshan 614000China Center for Applied Optics Research Leshan Normal UniversityLeshan 614000China Key Laboratory of Detection and Application of Space Effect in Southwest Sichuan Leshan 614000China CAS Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China School of Aeronautics Shandong Jiaotong UniversityJinan 250000China

V0405 Dra is a W UMa-type binary *** on the TESS data,we have conducted an orbital period study and performed a light curve analysis for the *** orbital period study reveals that the O-C curve for V0405 Dra exhibits secular decrease at an extremely high rate of d P/dt=-2.71×10^(-6)day year^(-1),along with periodic variations characterized by an amplitude of A_(3)=0.0032 day and a period of P_(3)=1.413 *** orbital periodic change is possibly due to the light-travel time effect resulting from an additional third body in the system,for which we estimate a minimum mass of M_(3)=0.77M_(⊙).By employing the 2013 version of the Wilson-Devinney(W-D)method to synthesize a light curve,we derived photometric solutions indicating that V0405 Dra is a new deep(f=68.7%)and low-mass ratio(q=0.175)contact *** fast decrease in its orbital period is likely caused by mass transfer from the more massive primary star to the less massive secondary star,or due to angular momentum *** further mass transfer and loss of angular momentum,the binary will gradually evolve into a tighter contact configuration,eventually leading to a merger into a single star,following the evolutionary paths suggested for such deep and low mass ratio contact binaries.

关键词： (stars:)binaries(including multiple):close (stars:)binaries:eclipsing stars:individual(V0405 Dra)

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Cervical cancer prevention in China: where are we now, and what's next?

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Cancer Biology & Medicine 2024年第3期21卷 213-217页

作者： Huijiao Yan Qiankun Wang Youlin qiao School of Population Medicine and Public Health Chinese Academy of Medical Sciences and Peking Union Medical CollegeBejing 100730China Department of Cancer Epidemiology National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBejing 100021China

Cervical cancer(CC) epidemiology CC, the fourth most frequently diagnosed malignancy in women worldwide, is a major global health challenge, particularly in low-resource regions. Approximately 88.1% of the 604,000 CC new cases occurred in low-and middle-income countries in 2020, and more than 90% of the 342,000 CC deaths occurred in low-and middle-income countries in 2020~1.

关键词： prevention Cervical epidemiology

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pH-controlled reversible sol-gel inversion by cerous phosphate nanofibers for hemostasis

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Rare Metals 2024年第10期43卷 5141-5151页

作者： Tuo Su Jun-Chen Xu Wei yu Dan Su Di-Er Shi Yi-Chao Pang Yao Ying Wang-Chang Li Juan Li Jing-Wu Zheng Liang qiao Sheng-Lei Che Jing yu Research Center of Magnetic and Electronic Materials College of Materials Science and EngineeringZhejiang University of Technology State Key Laboratory for Diagnosis and Treatment of Infectious Diseases Collaborative Innovation Center for Diagnosis and Treatment of Infectious DiseasesThe First Affiliated HospitalCollege of MedicineZhejiang University Key Laboratory of Drug Safety Evaluation and Research of Zhejiang Province Department of Clinical MedicineHangzhou Medical College Department of Chemistry Zhejiang University Clinical Medical College Yangzhou University

Developing biomimetic soft materials that display stimuli responsiveness using solely inorganic materials has been regarded as a challenge owing to that such materials?properties typically vary from those of living ***,biomimetic soft materials have been developed using organic materials or inorganic materials modified with organic small *** this study,we prepared cerium phosphate nanofibers （CePO4NFs） by using inorganic agents only without further *** CePO4NFs demonstrate sol-ge switching properties in response to pH value,allowing them to form a gel under high hydroxide ion （OH-） concentrations and turn back into sol under low *** formation of gel could be ascribed to the physical cross-linking of the nanofibers induced by the attractive electrostatic force of OH-and surface Ce3+.As a result,CePO4NFs are able to form a gel when in contac with blood of high pH value for *** specific clotting mechanism makes them better candidates for hemostasis of heavy bleeding.

关键词： Cerium phosphate nanofibers Hemostasis pH-responsive Reversible Sol-gel switching

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Ultra-low loss Rayleigh scattering enhancement via light recycling in fiber cladding

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Photonics Research 2024年第8期12卷 1813-1819页

作者： PENGTAO LUO FENGYI CHEN RUOHUI WANG XUEGUANG qiao School of Physics Northwest UniversityXi’an 710127China Engineering Research Center of Optical Fiber Well Logging Technology for Oil and Gas Resources Universities of Shaanxi ProvinceXi’an 710127China

Rayleigh backscattering enhancement(RSE)of optical fibers is an effective means to improve the performance of distributed optical fiber *** laser direct-writing techniques have been used to modulate the fiber core for ***,in-core modulation loses more transmission light,thus limiting the sensing *** this work,a cladding-type RSE(cl-RSE)structure is proposed,where the femtosecond laser is focused in the fiber cladding and an array of scatterers is written parallel to the *** refractive-index modulation structure redistributes the light in the cladding,and the backward scattered light is recovered,which enhances the Rayleigh backscattered signal with almost no effect on the core light.

关键词： fiber scattering cladding

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