检索结果-南通市图书馆

Selenate-based heterojunction with cobalt-nickel paired site for electrocatalytic oxidation of 5-hydroxymethylfurfural coupling water splitting to produce hydrogen

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第2期101卷 156-162页

作者： Zhengru yang Jia Hui Wangxi Fan Pengcheng Liu Chunyong Zhang Shuang Dong Zhou yang Department of Chemistry and Chemical Engineering & Jiangsu Key Laboratory of Clean Energy Storage and Conversion Jiangsu University of Technology Engineering Technology and Materials Research Center China Academy of Transportation Sciences School of Chemical Engineering and Materials Changzhou Institute of Technology

It is very appealing that 5-hydroxymethylfurfural（HMF） is electrocatalytical oxidized as 2,5-furandicarboxylic acid（FDCA） linking to non-classical cathodic hydrogen（H2） ***,the electrocatalysts for electrocatalytic HMF oxidative reaction（e-HMFOR） have been facing low Faradaic efficiency（FE） and high water splitting ***,we propose a strategy of the NiSeO3@（CoSeO3）4heterojunction by constructing a Co-Ni paired site,where the Co site is in charge of adsorbing for HMF while the electrons are transferred to the Ni site,thus giving the NiSeO3@（CoSeO3）4heterojunction superior electrocata lytic performances for e-HMFOR and water *** optimizing conditions,the NiSeO3@（CoSeO3）4heterojunction has high conversion of 99.7%,high selectivity of 99.9%,and high FE of 98.4% at 1.3 V,as well as low cell voltage of 1.31 V at 10 mA cm-2in 1 M KOH+0.1 M *** study offers a potential insight for e-HMFOR to high value-added FDCA coupling water splitting to produce H2in an economical manner.

关键词： Co-Ni paired site e-HMFOR FDCA Heterojunction Hydrogen evolution

High-temperature-tolerant flexible supercapacitors: Gel polymer electrolytes and electrode materials

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 Energy Chemistry 2025年第1期100卷 426-457页

作者： Chong Peng Xinyi Huang Mingwei Zhao Shuling Liao Quanhong yang Nianjun yang Siyu Yu School of Chemistry&Chemical Engineering Southwest UniversityChongqing 400715 China Nanoyang Group Tianjin Key Laboratory of Advanced Carbon and Electrochemical Energy StorageSchool of Chemical Engineering and Technologyand Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)Tianjin UniversityTianjin 300072 China Department of Chemistry&IMO–IMOMEC Hasselt UniversityDiepenbeek 3590Belgium Received 26 July 2024Revised 19 Aug

The development of flexible supercapacitors(FSCs) capable of operating at high temperatures is crucial for expanding the application areas and operating conditions of supercapacitors. Gel polymer electrolytes and electrode materials stand as two key components that significantly impact the efficacy of hightemperature-tolerant FSCs(HT-FSCs). They should not only exhibit high electrochemical performance and excellent flexibility, but also withstand intense thermal stress. Considerable efforts have been devoted to enhancing their thermal stability while maintaining high electrochemical and mechanical performance. In this review, the fundamentals of HT-FSCs are outlined. A comprehensive overview of state-of-the-art progress and achievements in HT-FSCs, with a focus on thermally stable gel polymer electrolytes and electrode materials is provided. Finally, challenges and future perspectives regarding HT-FSCs are discussed, alongside strategies for elevating operational temperatures and *** review offers both theoretical foundations and practical guidelines for designing and manufacturing HT-FSCs, further promoting their widespread adoption across diverse fields.

关键词： Flexible supercapacitors High-temperature tolerance Gel polymer electrolytes Electrode materials

在线全文

学校读者我要写书评

暂无评论

天然橡胶生产效率研究述评

热带农业科学 2010年第6期30卷 78-82页

作者：杨剑铖张德生海南大学经济与管理学院海南儋州571737

主要介绍天然橡胶种植业生产效率的国内外研究进展,并分析现有研究的侧重点及不足,探索天然橡胶生产效率研究的合理思路。

关键词：天然橡胶效率生产率

Lenalidomide regulates the CCL21/CCR7/ERK1/2 axis to inhibit migration and proliferation in diffuse large B-cell lymphoma

在线全文

学校读者我要写书评

暂无评论

Oncology Research 2025年第1期33卷 199-212页

作者： WEN yang BIN TANG DAN XU WENXIU yang Department of Pathology Guizhou Medical UniversityThe Affiliated Hospital of Guizhou Medical UniversityGuiyang550004China

Background:The prognostic significance of the chemokine receptor CCR7 in diffuse large B-cell lymphoma(DLBCL)has been reported ***,the detailed mechanisms of CCR7 in DLBCL,particularly regarding its interaction with lenalidomide treatment,are not fully ***:Our study utilized bioinformatics approaches to identify hub genes in SU-DHL-2 cell lines treated with lenalidomide compared to control *** data and clinical information from 122 patients with DLBCL were analyzed to assess the correlation of CCR7 and p-ERK1/2 expression with the prognosis of ***,in vitro and in vivo experiments were conducted to clarify the role of CCR7 in the response of DLBCL to lenalidomide ***:Our bioinformatics analysis pinpointed CCR7 as a hub gene in the context of lenalidomide treatment in ***,31.14%and 36.0%(44/122)of DLBCL cases showed positive expression for CCR7 and ERK1/2 respectively,establishing them as independent prognostic factors for adverse outcomes in DLBCL via multivariate Cox regression ***,our studies demonstrated that the external application of the protein CCL21 promoted proliferation,migration,invasion,and activation of the ERK1/2 pathway in SU-DHL-2 and OCI-LY3 cell lines with high levels of CCR7 *** effect was mitigated by CCR7 silencing through siRNA,application of ERK inhibitors,or lenalidomide *** vivo experiments reinforced the efficacy of lenalidomide,significantly reducing tumor growth rate,tumor mass,serum total LDH levels,and expression of CCR7 and p-ERK1/2 in a SUDHL-2 xenograft model in nude mice(p<0.05).Conclusion:Our study clarifies the potential role of the CCL21/CCR7/ERK1/2 axis in the therapeutic effects of lenalidomide in DLBCL treatment.

关键词： CCR7 CCL21 ERK1/2 Lenalidomide Diffuse large B-cell lymphoma(DLBCL)

Bandgap characteristics analysis and graded design of a novel metamaterial for flexural wave suppression

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

Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 1-24页

作者： Fan yang Zhaoyang MA Xingming GUO Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai Institute of Applied Mathematics and Mechanics School of Mechanics and Engineering ScienceShanghai University Shanghai Institute of Aircraft Mechanics and Control

A novel elastic metamaterial is proposed with the aim of achieving lowfrequency broad bandgaps and bandgap regulation. The band structure of the proposed metamaterial is calculated based on the Floquet-Bloch theorem, and the boundary modes of each bandgap are analyzed to understand the effects of each component of the unit cell on the bandgap formation. It is found that the metamaterials with a low elastic modulus of ligaments can generate flexural wave bandgaps below 300 Hz. Multi-frequency vibrations can be suppressed through the selective manipulation of bandgaps. The dual-graded design of metamaterials that can significantly improve the bandgap width is proposed based on parametric studies. A new way that can regulate the bandgap is revealed by studying the graded elastic modulus in the substrate. The results demonstrate that the nonlinear gradient of the elastic modulus in the substrate offers better bandgap performance. Based on these analyses, the proposed elastic metamaterials can pave the way for multi-frequency vibration control, low-frequency bandgap broadening, and bandgap tuning.

关键词： flexural wave bandgap graded design local resonance metamaterial O421+.5

Reconstructing forest and grassland cover changes in China over the past millennium

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Earth Sciences 2025年第1期68卷 94-110页

作者： Fanneng HE Fan yang Yafei WANG Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing100101China Key Research Institute of Yellow River Civilization and Sustainable Development Henan UniversityKaifeng475001China University of Chinese Academy of Sciences Beijing100049China

Historical forest and grassland cover changes not only are critical indicators for quantifying ecological and environmental change processes but also serve as fundamental data for long-term climate change simulations and terrestrial ecosystem carbon emission ***,because of limitations in historical data,quantitative estimations and spatially gridded reconstructions of these changes remain challenging,necessitating further methodological *** study focused on China's present-day land area over the past millennium,objectively capturing the characteristics and drivers of forest and grassland cover *** this basis,using the forest transition theory and the space-for-time substitution method,we depicted the historical deforestation process as an inverted“S”curve and developed a model to reconstruct historical forest area changes based on the functional relationship between the forest area and population size ***,a gridded forest allocation model was established on the basis of deforestation *** the grassland cover,we implemented regionspecific methods,such as the cropland area deduction method and the habitat constraint method,to quantitatively reconstruct historical ***,we obtained provincial forest and grassland area changes over the past millennium and mapped 10-km-resolution gridded data of forest and grassland *** results indicated the following.(1)The methods developed using population data as a proxy objectively reproduced the spatiotemporal evolution of forest and grassland cover in China over the past *** feasible methods offer a novel pathway for the quantitative reconstruction of historical forest and grassland cover changes.(2)The data indicated that China's forest area generally decreased over the past millennium,characterized by a“decrease-then-increase”*** forest area experienced three distinct phases:a slow decline(AD 1000–1650),a rapid decline(AD 16

关键词： Land use and land cover change Forest Grassland Quantitative reconstruction Gridded reconstruction China historical period

在线全文

学校读者我要写书评

暂无评论

节段内固定治疗腰椎峡部裂的生物力学研究

第一军医大学学报 1999年第4期19卷 366-367页

作者：杨建成靳安民余斌朱清安第一军医大学珠江医院骨科广州510282 第一军医大学生物力学实验室广州510515

在8具成人新鲜腰椎标本上，通过脊柱三维运动实验机，研究了横突棘突钢丝捆绑法、钩螺钉固定法及Buck螺钉固定法对峡部裂腰椎三维稳定性的影响。实验结果表明：三者均能显著地恢复脊柱的稳定性，且三者之间无显著差别。

关键词：腰椎峡部裂节段内固定生物力学骨折固定术

在线全文

学校读者我要写书评

暂无评论

论一元训练理论与高水平运动训练

吉林体育学院学报 2008年第3期24卷 46-47页

作者：季晓静杨建成扬州大学体育学院江苏扬州225009

20世纪50—60年代,我国萌发了一元训练理论。通过探讨运动训练的基本事实,分析一元训练理论与二元训练理论存在的差异,得出结论:一元训练理论对促进高水平运动训练具有积极作用。

关键词：一元训练理论二元训练理论高水平运动训练

裂解C_5馏分芳构化移动床催化剂开发及工艺探讨

在线全文

学校读者我要写书评

暂无评论

炼油技术与工程 2011年第10期41卷 14-17页

作者：杨建成吴德良中国石化集团洛阳石油化工工程公司河南省洛阳市471003 洛阳市环保局河南省洛阳市471000

洛阳石油化工工程公司针对裂解C5馏分芳构化反应特点开发了移动床小球催化剂LMAC,在评价LMAC性能的基础上进行了裂解C5移动床芳构化反应工艺试验研究,分析了含烯烃原料移动床芳构化反应再生工艺在工程开发中的重点问题。工业试生产所得L... 详细信息

洛阳石油化工工程公司针对裂解C5馏分芳构化反应特点开发了移动床小球催化剂LMAC,在评价LMAC性能的基础上进行了裂解C5移动床芳构化反应工艺试验研究,分析了含烯烃原料移动床芳构化反应再生工艺在工程开发中的重点问题。工业试生产所得LMAC小球催化剂机械强度、球形度均达到移动床过程对小球催化剂的要求。510℃条件下的模拟移动床试验效果表明,轻芳烃收率达到55.6%。液体产物组成中非芳烃组分以C5烃为主,不含C6以上非芳烃。

关键词：裂解C5 移动床芳构化芳烃