检索结果-南通市图书馆

Green Chemical Engineering 2022年第4期3卷 385-394页

作者： Hongqing Zhao qian Zhu Yan Zhuang Peng Zhan Yanou Qi Wenqiang Ren zhihao Si Di Cai Senshen Yu Peiyong Qin National Energy R&D Center for Biorefinery Beijing University of Chemical TechnologyBeijing100029China School of International Education Beijing University of Chemical TechnologyBeijing100029China Research Center for Eco-environmental Sciences Chinese Academy of ScienceBeijing100085China R&D Center Yunnan Yuntianhua Co.Ltd.No.1417th Dianchi Road650000KunmingChina College of Life Science and Technology Beijing University of Chemical TechnologyBeijing100029China

Photocatalyst-enzyme coupling process for visible light driven biotransformation holds promise in producing solar *** this work,aiming to produce furfuryl alcohol,the important bulk chemical that is typically derived from renewable lignocellulose,a highly selective furfural hydrogenation process is proposed by coordinating the alcohol dehydrogenase with the ZnIn2S4 assistant reduced form of nicotinamide adenine dinucleotid(NADH)*** indicated that under visible light irradiation,the hierarchical ZnIn2S4 microspheres exhibited excellent holes and electrons separating efficiency,affording to high NADH regeneration(yield of 90.2±3.28%).When adopting the photo-biocoupled reduction process in furfural transformation,a furfuryl alcohol yield of 79.4±1.95%was achieved under the optimized *** photocatalyst-enzyme coupling process also showed good stability,exceeding 70%of catalytic activity was reserved after reusing the catalysts for 10 *** novel photo-biocoupled system showed promising in extending to the highly selective hydrogenation of other biochemicals from lignocelluloses.

关键词： NADH regeneration Photobiocatalysis Furfural Furfuryl alcohol Selective hydrogenation

MACF1 deficiency suppresses tooth mineralization through IGF1 mediated crosstalk between odontoblasts and ameloblasts

在线全文

学校读者我要写书评

暂无评论

Genes & Diseases 2024年第5期11卷 9-12页

作者： Wuxia Qiu Xiao Lin Shaoqing Yang zhihao Chen Kewen Zhang Chaofei Yang Yu Li Zhiping Miao Xiaoni Deng Xiaohong Duan Airong qian Lab for Bone Metabolism Xi’an Key Laboratory of Special Medicine and Health EngineeringKey Lab for Space Biosciences and BiotechnologyResearch Center for Special Medicine and Health Systems EngineeringNPU-UAB Joint Laboratory for Bone MetabolismSchool of Life SciencesNorthwestern Polytechnical UniversityXi’anShaanxi 710072China State Key Laboratory of Military Stomatology National Clinical Research Center for Oral DiseasesDepartment of Oral BiologyClinic of Oral Rare and Genetic DiseasesSchool of StomatologyThe Fourth Military Medical UniversityXi’anShaanxi 710032China School of Chemical Engineering Sichuan University of Science&EngineeringZigongSichuan 643000China Research&Development Institute of Northwestern Polytechnical University in Shenzhen ShenzhenGuangdong 518063China Puyang Institute of Technology Henan UniversityPuyangHenan 457000China

Tooth mineralization is a ubiquitous and tightly regulated process involving complicated interactions between dental epithelium and *** molecules in tooth mineralization remain poorly *** actin cross-linking factor 1(MACF1)is a spectraplakin protein that plays pivotal roles in the brain,muscle,lung,and bone developmental process.^(1-3) To study the specific functions of MACF1 in bone formation,we established Macf1 conditional knockout mice using the Cre-LoxP system driven by Osxterix promoter(Osx-Cre;Macf1^(f/f)).^(2) Not surprisingly,Osx-Cre;Macf1^(f/f) mice displayed the phenotypes of delayed ossification and decreased bone ***,the OsxCre;Macf1^(f/f) mice unexpectedly showed a white and opaque appearance of incisors,contrary to the normal yellowbrown and transparent *** Osxterix is expressed in dental mesenchyme during tooth development,the abnormal tooth appearance might imply a new function of MACF1 in odontoblasts,or even ***,the present study aimed to investigate the role of MACF1 during tooth development.

关键词： mineralization linking transparent

Mechanical Sensitive Molecule MACF1 Promotes Osteoblast Differentiation

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

医用生物力学 2019年第A1期34卷 71-72页

作者： Lifang Hu Chong Yin Zixiang Wu Zizhang Huang Peihong Su Yan Zhang zhihao Chen Airong qian Lab for Bone Metabolism Key Lab for Space Biosciences and BiotechnologyResearch Center for Special Medicine and Health Systems EngineeringNPU-UAB Joint Laboratory for Bone MetabolismSchool of Life SciencesNorthwestern Polytechnical University

The decreased osteoblast differentiation associated with reduced bone formation is one main cause of microgravityinduced bone *** previous studies have demonstrated that microtubule actin crosslinking factor 1(MACF1)is downregulated in association with the decreased osteoblast differentiation and bone formation under simulated microgravity *** findings suggest that MACF1 is sensitive to mechanical condition and may be critical for osteoblast differentiation and bone *** verify this hypothesis,current study investigates the role and mechanism of MACF1 in regulatingosteoblast differentiation by adopting MACF1 knockdown(MACF1-KD)*** results showed that MACF1 knockdown suppressed mineralized nodules formation,alkaline phosphatase(ALP)activity,osteogenic gene expression andβ-catenin signaling ***,we used RNA sequencing(RNA-seq)and chromatin immunoprecipitation sequencing(ChIP-seq)to investigate further ***,we found that MACF1 sequesterd repressors of osteoblast differentiation in *** conclusion,MACF1 is sensitive to mechanical condition and plays key role in activatingβ-catenin signaling transduction and sequestering repressors of osteoblast differentiation,which further promotes osteoblast differentiation.

关键词： MACF1 osteoblast cell differentiation β-catenin signaling

Zeolite-mediated hybrid Cu^(+)/Cu~0 interface for electrochemical nitrate reduction to ammonia

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第12期87卷 136-143,I0005页

作者： Jiabao Lv Angjian Wu Liang Wang Yunhao Zhong zhihao Zeng Qunxing Huang Xiaoqing Lin Hao Zhang Shaojun Liu qian Liu Songqiang Zhu Xiaodong Li Jianhua Yan Zhifu Qi Hao Bin Wu State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou 310027ZhejiangChina Baima Lake Laboratory Hangzhou 310053ZhejiangChina Laboratory of Clean Energy and Carbon Neutrality of Zhejiang Province Jiaxing Research InstituteZhejiang UniversityJiaxing 314031ZhejiangChina Key Lab of Biomass Chemical Engineering of Ministry of Education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027ZhejiangChina Institute for Composites Science Innovation(InCSI)and State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027ZhejiangChina

The electrocatalytic conversion of reactive nitrogen species to ammonia is a promising strategy for efficient NH_(3) *** this study,we reveal that the hybrid Cu^(+)/Cu~0 interface is catalytically active for electrochemical ammonia synthesis from nitrate *** maintain the hybrid Cu^(+)/Cu~0 state at negative reaction potentials,hydrophilic zeolite is used to modify Cu/Cu_(2)O electrocatalyst,which demonstrates an impressive NH_(3) production rate of 41.65 mg h^(-1) cm^(-2)with ~100% Faradaic efficiency of ammonia synthesis at-0.6 V ***-situ Raman spectroscopy unveil the high activity originates from the zeolite reconstruction at the electrode–electrolyte interface,which protects the valence state of Cu~0/Cu^(+) site under negative potential and promotes electrochemical activity towards NH_(3) synthesis.

关键词： Electrochemical nitrate reduction reaction Ammonia synthesis In-situ Raman spectroscopy Zeolite Density functional theory

Topological metasurface:from passive toward active and beyond

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2023年第3期11卷 I0002-I0039页

作者： JIAN WEI YOU zhihao LAN qian MA ZHEN GAO YIHAO YANG FEI GAO MENG XIAO TIE JUN CUI State Key Laboratory of Millimetre Waves School of Information Science and EngineeringSoutheast UniversityNanjing 210096China Department of Electronic and Electrical Engineering University College LondonCollege LondonLondon WC1E 7JEUK Department of Electronic and Electrical Engineering Southern University of Science and TechnologyShenzhen 518055China State Key Laboratory of Modern Optical Instrumentation College of Information Science and Electronic EngineeringZhejiang UniversityHangzhou 310058China School of Physics and Technology Wuhan UniversityWuhan 430072China

Metasurfaces are subwavelength structured thin films consisting of arrays of units that allow the control of polarization,phase,and amplitude of light over a subwavelength *** developments in topological photonics have greatly broadened the horizon in designing metasurfaces for novel functional *** this review,we summarize recent progress in the research field of topological metasurfaces,first from the perspectives of passive and active in the classical regime,and then in the quantum *** specifically,we begin by examining the passive topological phenomena in two-dimensional photonic systems,including both time-reversal broken systems and time-reversal preserved ***,we discuss the cutting-edge studies of active topological metasurfaces,including nonlinear topological metasurfaces and reconfigurable topological *** overviewing topological metasurfaces in the classical regime,we show how they could provide a new platform for quantum information and quantum many-body ***,we conclude and describe some challenges and future directions of this fast-evolving field.

关键词： passive topological regime

Observation-based sources evolution of non-methane hydrocarbons (NMHCs) in a megacity of China

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2023年第2期124卷 794-805页

作者： Yarong Peng Hongli Wang qian Wang Shengao Jing Jingyu An Yaqin Gao Cheng Huang Rusha Yan Haixia Dai Tiantao Cheng qiang Zhang Meng Li Jianlin Hu zhihao Shi Li Li Shengrong Lou Shikang Tao Qinyao Hu Jun Lu Changhong Chen Department of Environmental Science and Engineering Shanghai Key Laboratory of Atmospheric Particle Pollution and PreventionInstitute of Atmospheric SciencesFudan UniversityShanghai 200438China State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Pollution Complex Shanghai Academy of Environmental SciencesShanghai 200233China Department of Atmospheric and Oceanic Sciences Institute of Atmospheric SciencesFudan UniversityShanghai 200438China Department of Earth System Science Ministry of Education Key Laboratory for Earth System ModelingTsinghua UniversityBeijing 100084China Big Data Institute for Carbon Emission and Environmental Pollution Fudan UniversityShanghai 200438China School of Environmental Science and Engineering Nanjing University of Information Science&TechnologyNanjing 210044China

Both concentrations and emissions of many air pollutants have been decreasing due to implement of control measures in China,in contrast to the fact that an increase in emissions of non-methane hydrocarbons(NMHCs)has been *** study employed seven years continuous NMHCsmeasurements and the related activities data of Shanghai,a megacity in China,to explore evolution of emissions and effectiveness of air pollution control *** mixing ratio of NMHCs showed no statistical interannual changes,of which their compositions exhibited marked *** resulted in a decreasing trend of ozone formation potential by 3.8%/year(p<0.05,the same below),which should be beneficial to ozone pollution mitigation as its production in Shanghai is in the NMHCs-limited *** alkanes,aromatics and acetylene changed by+3.7%/year,-5.9%/year and-7.4%/year,respectively,and alkenes showed no apparent *** sources were apportioned by a positive matrix factorization ***,vehicular emissions(-5.9%/year)and petrochemical industry emissions(-7.1%/year)decreased significantly,but the decrease slowed down;significant reduction in solvent usage(-9.0%/year)appeared after 2010;however,emissions of natural gas(+12.6%/year)and fuel evaporation(with an increasing fraction)became more *** inconsistency between observations and inventories was found in interannual trend and speciation as well as source contributions,emphasizing the need for further validation in NMHCs emission *** study confirms the effectiveness of measures targeting mobile and centralized emissions from industrial sources and reveals a need focusing on fugitive emissions,which provided new insights into future air policies in polluted region.

关键词： Characteristics Source apportionment Observation-based Interannual trend Shanghai

Dynamic tunable LWIR achromatic metalens comprising all-As_(2)Se_(3) microstructures

在线全文

学校读者我要写书评

暂无评论

Chinese Optics Letters 2024年第6期22卷 191-195页

作者： zhihao He Bingxia Wang Zhiang qian Kongsi Zhou Xiang Shen Yungui Ma Laboratory of Infrared Materials and Devices The Research Institute of Advanced TechnologiesKey Laboratory of Photoelectric Detection Materials and Devices of Zhejiang ProvinceNingbo UniversityNingbo 315211China State Key Laboratory of Modern Optical Instrumentation Centre for Optical and Electromagnetic ResearchCollege of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZhejiang UniversityHangzhou 310058China

In the field of long-wave infrared(LWIR) thermal imaging, vital for applications such as military surveillance and medical diagnostics, metalenses show immense potential for compact, lightweight, and low-power optical systems. However, to date, the development of LWIR broadband achromatic metalenses with dynamic tunable focus, which are suitable for both coaxial and off-axis applications, remains a large unexplored area. Herein, we have developed an extensive database of broadband achromatic all-As2Se3microstructure units for the LWIR range. Utilizing this database with the particle swarm optimization (PSO) algorithm, we have designed and demonstrated LWIR broadband achromatic metalenses capable of coaxial and off-axis focusing with three dynamic tunable states. This research may have potential applications for the design of compact, high-performance optical devices, including those with extreme depth-of-field and wide-angle imaging capabilities.

关键词： achromatic metalens long-wave infrared dynamic tunable focus

基于Swin Transformer的双流遥感图像时空融合超分辨率重建

在线全文

学校读者我要写书评

暂无评论

计算机工程 2024年第9期50卷 33-45页

作者：王志浩钱沄涛浙江大学工程师学院浙江杭州310015 浙江大学计算机科学与技术学院浙江杭州310027

遥感图像时空融合超分辨重建从高时序密度的低分辨率图像和低时序密度的高分辨率图像中提取信息,生成同时具有高时序密度的高分辨率遥感图像,它直接关系到后续的解译、检测、跟踪等任务的实施。随着卷积神经网络(CNN)的快速发展,研究者... 详细信息

遥感图像时空融合超分辨重建从高时序密度的低分辨率图像和低时序密度的高分辨率图像中提取信息,生成同时具有高时序密度的高分辨率遥感图像,它直接关系到后续的解译、检测、跟踪等任务的实施。随着卷积神经网络(CNN)的快速发展,研究者们提出了一系列基于CNN的时空融合方法,然而由于卷积的局限性,这些方法在全局信息提取方面仍然存在不足。受Swin Transformer全局能力的启发,提出一种基于Swin Transformer的超分辨重建模型。在特征提取阶段,引入双流结构,将特征提取网络分为两个部分,分别提取时间信息与空间信息,并通过Swin Transformer的全局能力提升模型性能。在特征融合阶段,引入结合通道注意力与空间注意力的卷积块注意力模块(CBAM),用于增强重要特征,提升图像重建精度。在Coleambally灌溉区(CIA)与Gwydir下游流域(LGC)数据集上将该模型与多种时空融合超分辨率重建模型进行对比实验,结果表明该模型在各项评价指标上均取得了最优的结果,具有更出色的性能和更强的泛化能力。

关键词：时空融合超分辨率重建 Swin Transformer算法双流结构卷积神经网络

利用Ca(NO_3)_2-P_2O_5乙醇溶液体系制备纳米羟基磷灰石

在线全文

学校读者我要写书评

暂无评论

稀有金属材料与工程 2007年第9期36卷 1649-1652页

作者：侯广亚金志浩郑小惠钱军民西安交通大学陕西西安710049

使用Ca(NO3)2-P2O5乙醇溶液体系制备纳米羟基磷灰石,研究了在该体系中水浴温度、煅烧温度、陈化时间等因素对粉体的相成分,粒度和结晶度的影响。结果表明:水浴温度低,合成的粉体粒度小(约20nm),颗粒均匀且具有良好的分散性,但是结晶度较... 详细信息

使用Ca(NO3)2-P2O5乙醇溶液体系制备纳米羟基磷灰石,研究了在该体系中水浴温度、煅烧温度、陈化时间等因素对粉体的相成分,粒度和结晶度的影响。结果表明:水浴温度低,合成的粉体粒度小(约20nm),颗粒均匀且具有良好的分散性,但是结晶度较低;陈化后导致粉体粒度变大,结晶度增加;随着煅烧温度的升高,粉体的结晶度增加,600℃时可以得到结晶高的单一的羟基磷灰石粉体。在800℃煅烧时,羟基磷灰石发生部分分解。

关键词：纳米羟基磷灰石制备结晶度

新时代民族团结进步创新实践与整合效应研究——以黑龙江省牡丹江市为例

在线全文

学校读者我要写书评

暂无评论

西南民族大学学报（人文社会科学版） 2019年第3期40卷 14-20页

作者：彭谦程志浩中央民族大学中国民族理论与民族政策研究院

民族团结政策是我国正确处理民族关系的总的政策之一,深入广泛地开展民族团结进步创建活动,是推动社会主义和谐民族关系健康发展的必然要求。新时代在习近平总书记关于民族团结的重要论述指导下,黑龙江省牡丹江市在自身现实基础上,逐步... 详细信息

民族团结政策是我国正确处理民族关系的总的政策之一,深入广泛地开展民族团结进步创建活动,是推动社会主义和谐民族关系健康发展的必然要求。新时代在习近平总书记关于民族团结的重要论述指导下,黑龙江省牡丹江市在自身现实基础上,逐步探索出符合其发展的工作机制,整合了"教育"与"宣传"、"经济结构调整"与"民族团结"、"社区街道工作"与"治理主体能动性"等方面,在民族团结进步创建工作中取得了较好的工作成效。

关键词：牡丹江民族团结进步创建活动整合效应