检索结果-南通市图书馆

Stress granules: friend or foe in neurodegenerative disorders?

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2024年第2期19卷 403-404页

作者： shanshan xu Nico P.Dantuma Department of Cell and Molecular Biology(CMB) Karolinska InstitutetSolnavägen 9S-17165 StockholmSweden

Neurodegenerative diseases,such as Alzheimer’s disease,Parkinson’s disease,and amyotrophic lateral sclerosis,despite the diversity in clinical symptoms,share a striking feature at the cellular level:the accumulation of insoluble aggregates of misfolded proteins that are sequestered in intraneuronal inclusion *** mutations in disease-associated proteins that render them aggregation-prone,the decline of protein homeostasis(***)with aging is also believed to be a contributing factor to the accumulation of protein aggregates.

关键词： degenerative homeostasis clinical

Recent advances in non-thermal plasma(NTP)catalysis towards C1 chemistry

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2020年第8期28卷 2010-2021页

作者： Huanhao Chen Yibing Mu shanshan xu Shaojun xu Christopher Hardacre Xiaolei Fan State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 210009China Department of Chemical Engineering and Analytical Science School of EngineeringThe University of ManchesterM139PLUnited Kingdom School of Chemistry Cardiff UniversityMain BuildingPark PlaceCardiff CF103ATUnited Kingdom UK Catalysis Hub Research Complex at HarwellRutherford Appleton LaboratoryHarwellOxon OX110FAUnited Kingdom

C1 chemistrymainly involves the catalytic transformation of C1molecules(i.e.,CO,CO2,CH4 and CH3OH),which usually encounters thermodynamic and/or kinetic *** address these limitations,non-thermal plasma(NTP)activated heterogeneous catalysis offers a number of advantages,such as relatively mild reaction conditions and energy efficiency,in comparison to the conventional thermal *** review presents the state-of-the-art for the application of NTP-catalysis towards C1 chemistry,including the CO2 hydrogenation,reforming of CH4 and CH3OH,and water-gas shift(WGS)*** the hybrid NTP-catalyst system,the plasma-catalyst interactions ***,this reviewalso includes a brief discussion on the fundamental research into themechanisms of NTP activated catalytic C1 chemistry,such as the advanced characterisation methods(e.g.,in situ diffuse reflectance infrared Fourier transform spectroscopy,DRIFTS),temperatureprogrammed plasma surface reaction(TPPSR),kinetic ***,prospects for the future research on the development of tailor-made catalysts for NTP-catalysis systems(which will enable the further understanding of its mechanism)and the translation of the hybrid technique to practical applications of catalytic C1 chemistry are discussed.

关键词： Non-thermal plasma(NTP) Heterogeneous catalysis C1 chemistry Mechanism In situ characterisation

The Convergence of Euler-Maruyama Method of Nonlinear Variable-Order Fractional Stochastic Differential Equations

在线全文

学校读者我要写书评

暂无评论

Advances in Applied Mathematics and Mechanics 2023年第4期15卷 852-879页

作者： shanshan xu Lin Wang Wenqiang Wang School of Mathematics and Computational Science&Hunan Key Laboratory for Computation and Simulation in Science and Engineering Xiangtan UniversityXiangtanHunan 411105China

In this paper,we first prove the existence and uniqueness theorem of the solution of nonlinear variable-order fractional stochastic differential equations(VFSDEs).We futher constructe the Euler-Maruyama method to solve the equations and prove the convergence in mean and the strong convergence of the *** particular,when the fractional order is no longer varying,the conclusions obtained are consistent with the relevant conclusions in the existing ***,the numerical experiments at the end of the article verify the correctness of the theoretical results obtained.

关键词： Variable-order Caputo fractional derivative Stochastic differential equations Euler-Maruyama method convergence multiplicative noise

Removal process and mechanism of hexavalent chromium by adsorption-coupled reduction with marine-derived Aspergillus niger mycelial pellets

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

Chinese Journal of Chemical Engineering 2022年第9期35卷 198-204页

作者： shanshan xu Qilei Zhang Dongmei Bai Linian Cai Tao Lu Shanjing Yao Key Laboratory of Biomass Chemical Engineering of Ministry of Education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China College of Environment Zhejiang University of TechnologyHangzhou 310014China

In order to remove hexavalent chromium(Cr(Ⅵ))from solutions efficiently,the mycelial pellets with a marine-derived fungus Aspergillus niger as a biosorbent were *** effects of removal process parameters such as solution pH,initial Cr(Ⅵ)concentration and biomass concentration on Cr(Ⅵ)removal process were *** results showed that Cr(Ⅵ)removal rate up to 100%could be achieved under optimized conditions,which indicated the excellent Cr(Ⅵ)removal performance of the Aspergillus niger *** a more important point,the Cr(Ⅵ)removal mechanism was studied,and the results revealed that Cr(Ⅵ)removal was achieved in the adsorption-coupled reduction process.A little of Cr(Ⅵ)was reduced to less toxic trivalent chromium(Cr(Ⅲ))in solution,while some was absorbed on the surface of mycelial *** they may be reduced on the surface or transferred into cells and then be *** marine-derived *** mycelial pellets show properties of easy preparation and separation and cost effectiveness,which are potential biosorbent and reductant in the treatment of trace chromate containing wastewater.

关键词： Cr(Ⅵ)removal Aspergillus niger Mycelial pellets Adsorbent Reduction

Components and Anisotropy of 3D QFP Waves During the Early Solar Eruption

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2024年第12期24卷 107-117页

作者： Jialiang Hu Jing Ye Yuhao Chen Zhixing Mei shanshan xu Jun Lin Yunnan Observatories Chinese Academy of Sciences University of Chinese Academy of Sciences Yunnan Key Laboratory of Solar Physics and Space Science Yunnan Province China–Malaysia HF-VHF Advanced Radio Astronomy Technology International Joint Laboratory

The propagation of disturbances in the solar atmosphere is inherently three-dimensional(3D), yet comprehensive studies on the spatial structure and dynamics of 3D wave fronts are scarce. Here we conduct high-resolution 3D numerical simulations to investigate filament eruptions, focusing particularly on the 3D structure and genesis of extreme ultraviolet(EUV) waves. Our results demonstrate that the EUV wave front forms a dome-like configuration subdivided into three distinct zones. The foremost zone, preceding the flux rope, consists of fastmode shock waves that heat the adjacent plasma. Adjacent to either side of the flux rope, the second zone contains expansion waves that cool the nearby plasma. The third zone, at the juncture of the first two, exhibits minimal disturbances. This anisotropic structure of the wave front stems from the configuration and dynamics of the flux rope, which acts as a 3D piston during eruptions—compressing the plasma ahead to generate fast-mode shocks and evacuating the plasma behind to induce expansion waves. This dynamic results in the observed anisotropic wave front. Additionally, with synthetic EUV images from simulation data, the EUV waves are observable in Atmospheric Imaging Assembly 193 and 211 ?, which are identified as the fast-mode shocks. The detection of EUV waves varies with the observational perspective: the face-on view reveals EUV waves from the lower to the higher corona, whereas an edge-on view uncovers these waves only in the higher corona.

关键词： shock waves Sun: corona Sun: coronal mass ejections (CMEs)

Characteristics Analysis and Risk Assessment of Extreme Water Levels Based on 60-Year Observation Data in Xiamen, China

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2022年第2期21卷 315-322页

作者： MIAO Qingsheng YUE Xinyang YANG Jinkun WANG Zhifeng xu shanshan YANG Yang CHU Siqi National Marine Data and Information Service Tianjin 300171China Shandong Province Key Laboratory of Ocean Engineering Ocean University of ChinaQingdao 266100China

Extreme water levels are related to astronomical tides and storm *** typhoon systems,which have caused extreme water level rises,were selected based on 60-yr water level data from the Xiamen tide gauge *** these 11 typhoon systems,the astronomical tide component accounts for 71%-95%of the total water *** Gumbel distribution of extreme water level rise was estimated,and the impact of typhoon surges on water levels during the return period was *** ex-treme tide levels caused by typhoons Herb(1996)and Dujuan(2015)are much higher than those of other typhoons and correspond to the return period of 76 yr and 71 yr,*** differences of sea levels in the presence and absence of these two typhoons in the 10-100 yr return period are 5.8-11.1 *** the 100-yr return period,the total risks within 10,25,50,and 100 yr increase by 94.3%,85.4%,72.9%,and 54.4%,respectively,if the Herb and Dujuan are not *** that typhoon Herb(1996)occurred during the highest astronomical tide,it will produce a water level higher than that of the 1000-yr return *** level rise has an important influence on the water level return period,and the contribution of nonlinear sea level rise in the next 100 yr is estimated to be 10.34%.

关键词： storm surge astronomical tide extreme water level hazard risk

Stereocomplexed Materials of Chiral Polymers Tuned by Crystallization:A Case Study on Poly(lactic acid)

在线全文

学校读者我要写书评

暂无评论

Accounts of Materials Research 2022年第12期3卷 1309-1322页

作者： Ying Zheng shanshan xu Chengtao Yu Pengju Pan State Key Laboratory of Chemical Engineering College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China Institute of Zhejiang University-Quzhou Quzhou 324000China

CONSPECTUS:Widespread in chemistry and biochemistry,chirality strongly affects the biological,chemical,material,and physical *** a downstream derivative,the enantiopure polymers of opposite chirality can cocrystallize in the stereocomplex(SC)in their enantiomeric blends or block copolymers,which endows the materials with improved physical properties and specific functions such as enhanced melting temperature,thermal stability,crystallizability,and hydrolytic resistance.

关键词： properties. Chiral blends

Sustaining enhanced condensation on hierarchical mesh-covered surfaces

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

National Science Review 2018年第6期5卷 878-887页

作者： Rongfu Wen shanshan xu Dongliang Zhao Lixin Yang xuehu Ma Wei Liu Yung-Cheng Lee Ronggui Yang School of Energy and Power Engineering Huazhong University of Science and Technology Department of Mechanical Engineering University of Colorado Schoolof Mechanical Electronic and Control Engineering Beijing Jiaotong University State Key Laboratory of Fine Chemicals Liaoning Key Laboratory of Clean Utilization of Chemical ResourcesInstitute of Chemical Engineering Dalian University of Technology

Controlling the solid–liquid–vapor tri-phase interface is of fundamental importance for a broad range of industrial applications including biomedical engineering, energy production and utilization, environmental control, water production, and thermal management. Although a lot of progress has been made over the past few decades on surface manipulation for promoting droplet removal, it is challenging to accelerate both droplet growth and surface refreshing for enhancing vapor-to-liquid condensation. Here we present a superhydrophobic hierarchical mesh-covered(hi-mesh) surface to enable continuous sucking flow of liquid condensate, which achieves fourfold-higher droplet growth and 36.8% faster surface refreshing compared to the state-of-the-art dropwise condensation. Unprecedented enhanced condensation heat transfer is observed to be sustained over a wide range of surface subcooling on the hi-mesh surfaces. This demonstration of sustained enhanced condensation enhancement is not only of fundamental scientific importance, but also provides a viable strategy for large-scale deployment of micro/nanostructured surfaces in a diverse range of technologies.

关键词： condensation hierarchical mesh sucking flow droplet dynamic water-repellency heat transfer enhancement

Research on the Fragment Impact Resistance of a Composite Mast

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Marine Science and Application 2011年第3期10卷 300-305页

作者： Wei Zhang Chao Wu Wenshan Yang shanshan xu Shaofei Ren China Ship Development and Design Center Wuhan 430064 China College of Shipbuilding Engineering Harbin Engineering University Harbin 150001 China

Due to the unique structural mode and material property of a composite sandwich plate, related research such as fragment impact resistance of a composite mast is short of publication and urgent in this field. In this paper, the commonly accepted sandwich core board theory was modified. Damage caused by a fragment attack was simulated onto a sandwich plate model built with solid and shell elements. It was shown that shear failure and vast matrix cracking are the main reasons for outer coat damage, and tension failure and partial matrix cracking are the cause for inner coat damage. Additionally, according to complexities in actual sea battles, different work conditions of missile attacks were set. Ballistic limit values of different fragment sizes were also obtained, which provides references for enhancing the fragment impact resistance of a composite mast.

关键词： composite mast sandwich plate fragment impact ballistic limit