检索结果-南通市图书馆

Rational Design of Ruddlesden-Popper Perovskite Ferrites as Air Electrode for Highly Active and Durable Reversible Protonic Ceramic Cells

引用

nano-Micro Letters 2024年第9期16卷 308-324页

作者： na yu Idris Temitope Bello Xi Chen Tong Liu Zheng Li yufei Song Meng Ni Department of Building and Real Estate Research Institute for Sustainable Urban Development(RISUD)and Research Institute for Smart Energy(RISE)The Hong Kong Polytechnic UniversityHung HomKowloonHong KongPeople’s Republic of China The Hong Kong Polytechnic University Shenzhen Research Institute Shenzhen 518057GuangdongPeople’s Republic of China Department of Mechanical and Aerospace Engineering The Hong Kong University of Science and TechnologyClear Water BayHong KongPeople’s Republic of China

Reversible protonic ceramic cells(RePCCs)hold promise for efficient energy storage,but their practicality is hindered by a lack of high-performance air electrode materials.Ruddlesden-Popper perovskite Sr_(3)Fe_(2)O_(7−δ)(SF)exhibits superior proton uptake and rapid ionic conduction,boosting activity.However,excessive proton uptake during RePCC operation degrades SF’s crystal structure,impacting durability.This study introduces a novel A/B-sites co-substitution strategy for modifying air electrodes,incorporating Sr-deficiency and Nb-substitution to create Sr_(2.8)Fe_(1.8)Nb_(0.2)O_(7−δ)(D-SFN).Nb stabilizes SF’s crystal,curbing excessive phase formation,and Sr-deficiency boosts oxygen vacancy concentration,optimizing oxygen transport.The D-SFN electrode demonstrates outstanding activity and durability,achieving a peak power density of 596 mW cm^(−2)in fuel cell mode and a current density of−1.19 A cm^(−2)in electrolysis mode at 1.3 V,650℃,with excellent cycling durability.This approach holds the potential for advancing robust and efficient air electrodes in RePCCs for renewable energy storage.

关键词： Reversible protonic ceramic cells Air electrode Ruddlesden-Popper perovskite Hydration Oxygen reduction reaction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Application of GNSS-PPP on Dynamic Deformation Monitoring of Offshore Platforms

引用

China Ocean Engineering 2024年第2期38卷 352-361页

作者： yu Li-na XIONG Kuan GAO Xi-feng LI Zhi FAN Li-long ZHANG Kai Institute of Ocean Energy and Intelligent Construction Tianjin University of TechnologyTianjin 300384China China Railway Construction Bridge Engineering Bureau Group Co.LTD Tianjin 300300China School of Civil Engineering Tianjin UniversityTianjin 300072China Department of Land Surveying and Geo-Informatics The Hong Kong Polytechnic UniversityHong KongChina State Key Laboratory of Precision Blasting Jianghan UniversityWuhan 430056China

The real-time dynamic deformation monitoring of offshore platforms under environmental excitation is crucial to their safe operation.Although Global navigation Satellite System-Precise Point Positioning(GNSS-PPP)has been considered for this purpose,its monitoring accuracy is relatively low.Moreover,the influence of background noise on the dynamic monitoring accuracy of GNSS-PPP remains unclear.Hence,it is imperative to further validate the feasibility of GNSS-PPP for deformation monitoring of offshore platforms.To address these concerns,vibration table tests with different amplitudes and frequencies are conducted.The results demonstrate that GNSS-PPP can effectively monitor horizontal vibration displacement as low as±30 mm,which is consistent with GNSS-RTK.Furthermore,the spectral characteristic of background noise in GNSS-PPP is similar to that of GNSS-RTK(Real Time Kinematic).Building on this observation,an improved Complete Ensemble Empirical Mode Decomposition with Adaptive Noise(CEEMDAN)has been proposed to de-noise the data and enhance the dynamic monitoring accuracy of GNSS-PPP.Field monitoring application research is also undertaken,successfully extracting and analyzing the dynamic deformation of an offshore platform structure under environmental excitation using GNSS-PPP monitoring in conjunction with improved CEEMDAN de-noising.By comparing the de-noised dynamic deformation trajectories of the offshore platform during different periods,it is observed that the platform exhibits reversible alternating vibration responses under environmental excitation,with more pronounced displacement deformation in the direction of load action.The research results confirm the feasibility and potential of GNSS-PPP for dynamic deformation monitoring of offshore platforms.

关键词： GNSS-PPP offshore platform dynamic deformation monitoring improved CEEMDAN de-noising

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

New material of Coniopteris simplex from the Middle Jurassic of the Ordos Basin,Inner Mongolia,China and implications on its spatio-temporal distribution and paleogeography

引用

Journal of Palaeogeography 2024年第2期13卷 199-211页

作者： yun-Feng Li Chang-Lu Zhang Fei Liang Xiao Tan Fan-Hao Gong Chun-Lin Sun Tao Li yu-Ling na Research Center of Paleontology and Stratigraphy Jilin UniversityChangchun 130026Jilin ProvinceChina College of Earth Sciences Jilin UniversityChangchun 130061Jilin ProvinceChina College of Paleontology Shenyang Normal UniversityShenyang 110034Liaoning ProvinceChina Key Lab of Evolution of Past Life in NE Asia Ministry of Natural ResourcesShenyang Normal UniversityShenyang 110034Liaoning ProvinceChina Shenyang Center of Geological Survey China Geological SurveyShenyang 110034Liaoning ProvinceChina

Coniopteris simplex is a common component in many Jurassic floras.However,due to morphological variations in sterile fronds and incomplete preservation of reproductive organs,its classification has been controversial for a long time.Here,we present new material collected from the Middle Jurassic Yan’an Formation in the Ordos Basin,Inner Mongolia.The new material reveals important morphological characters,including hemi-dimorphic fronds,two forms of sterile pinnae,short-stalked sori and sporangia on fertile fronds,annulus of sporangium composed of about 30 cells,in situ rounded triangular spores with protruded suture,and the lips of trilete laesura encircled by one or two rows of small ostioles.Based on these observations,we emended the diagnosis of this common species.The spatio-temporal distribution of Coniopteris simplex shows that the iconic species was restricted to the paleolatitudes ranging from 19.5°N to 48.9°N in the Northern Hemisphere during the Early—Late Jurassic,mainly distributed in the tropical to paratropical zones,and the paleolongitude ranging from 9.6°E to 129.3°E,which may be limited by the opening of the Viking Corridor and the splitting of the Central Atlantic Ocean.

关键词： Coniopteris simplex Yan'an Formation Middle Jurassic Inner Mongolia Paleogeography

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

N-acetylserotonin alleviates retinal ischemia-reperfusion injury via HMGB1/RAGE/NF-κB pathway in rats

引用

International Journal of Ophthalmology(English edition) 2024年第2期17卷 228-238页

作者： yu-Ze Zhao Xue-Ning Zhang Yi Yin Pei-Lun Xiao Meng Gao Lu-Ming Zhang Shuan-Hu Zhou Shu-na yu Xiao-Li Wang Yan-Song Zhao Department of Ophthalmology Affiliated Hospital of Weifang Medical UniversityWeifang 261031Shandong ProvinceChina School of Medical Imaging Weifang Medical UniversityWeifang 261053Shandong ProvinceChina Department of Anatomy Weifang Medical UniversityWeifang 261053Shandong ProvinceChina Departments of Orthopedic Surgery Brigham and Women’s HospitalHarvard Medical SchoolBostonMA 02115USA

AIM:To observe the effects of N-acetylserotonin(naS)administration on retinal ischemia-reperfusion(RIR)injury in rats and explore the underlying mechanisms involving the high mobility group box 1(HMGB1)/receptor for advanced glycation end-products(RAGE)/nuclear factor-kappa B(NF-κB)signaling pathway.METHODS:A rat model of RIR was developed by increasing the pressure of the anterior chamber of the eye.Eighty male Sprague Dawley were randomly divided into five groups:sham group(n=8),RIR group(n=28),RIR+naS group(n=28),RIR+FPS-ZM1 group(n=8)and RIR+naS+FPS-ZM1 group(n=8).The therapeutic effects of naS were examined by hematoxylin-eosin(H&E)staining,and retinal ganglion cells(RGCs)counting.The expression of interleukin 1 beta(IL-1β),HMGB1,RAGE,and nod-like receptor 3(NLRP3)proteins and the phosphorylation of nuclear factorkappa B(p-NF-κB)were analyzed by immunohistochemistry staining and Western blot analysis.The expression of HMGB1 protein was also detected by enzyme-linked immunosorbent assay(ELISA).RESULTS:H&E staining results showed that naS significantly reduced retinal edema and increased the number of RGCs in RIR rats.With naS therapy,the HMGB1 and RAGE expression decreased significantly,and the activation of the NF-κB/NLRP3 pathway was antagonized along with the inhibition of p-NF-κB and NLRP3 protein expression.Additionally,naS exhibited an anti-inflammatory effect by reducing IL-1βexpression.The inhibitory of RAGE binding to HMGB1 by RAGE inhibitor FPS-ZM1 led to a significant decrease of p-NF-κB and NLRP3 expression,so as to the IL-1βexpression and retinal edema,accompanied by an increase of RGCs in RIR rats.CONCLUSION:naS may exhibit a neuroprotective effect against RIR via the HMGB1/RAGE/NF-κB signaling pathway,which may be a useful therapeutic target for retinal disease.

关键词： retinal diseases retinal ischemia—reperfusion injury N-acetylserotonin high mobility group box 1 receptor for advanced glycation end-products nuclear factor-κB rats

来源：

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

公众基因本质论:成因、表现与解决策略

引用

上海交通大学学报（哲学社会科学版） 2024年第4期32卷 117-127,138页

作者：禹娜徐豪华东师范大学教师教育学院上海200062

基因本质论是一种对遗传过程过度简单化的认知倾向,其在一定程度上左右了公众在医疗、饮食等方面的抉择。公众基因本质论脱胎于心理本质论,其发生扩散过程中,现代遗传学的精深化、公众科学素养的欠缺以及大众媒体不严谨的表述习惯都起... 详细信息

基因本质论是一种对遗传过程过度简单化的认知倾向,其在一定程度上左右了公众在医疗、饮食等方面的抉择。公众基因本质论脱胎于心理本质论,其发生扩散过程中,现代遗传学的精深化、公众科学素养的欠缺以及大众媒体不严谨的表述习惯都起到了推波助澜的作用。表型的固定性、病因的特定性、群体的同质性或离散性、伦理的自然性是公众基因本质论的四种表现形式,它们会导致公众对基因研究及相关技术产生排斥恐惧或过度追捧的两种极端心理,也容易强化群体歧视等社会问题及出身论等封建思想。当前,加强科技科普工作协同发展,针对遗传学内容进行教育干预,提高大众媒体发声的真实性和准确性,提升公众科学素养、基因组学素养及媒介素养,是减少公众基因本质论倾向的有效途径。

关键词：基因本质论公众认知解决策略

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

多发肋骨骨折合并降主动脉破裂出血及创伤性湿肺患者的术后护理

引用

中华急危重症护理杂志 2024年第2期5卷 121-124页

作者：余娜衢州市人民医院急诊重症监护室浙江省衢州市324000

总结了1例多发肋骨骨折合并降主动脉破裂出血、创伤性湿肺患者的护理体会。护理要点:早期识别再出血风险;积极预防肺部并发症;实施分阶段锻炼,预防深静脉血栓;精细化营养护理及提供个性化心理护理。通过实施多层面干预措施,改善患者预后... 详细信息

总结了1例多发肋骨骨折合并降主动脉破裂出血、创伤性湿肺患者的护理体会。护理要点:早期识别再出血风险;积极预防肺部并发症;实施分阶段锻炼,预防深静脉血栓;精细化营养护理及提供个性化心理护理。通过实施多层面干预措施,改善患者预后,术后10 d患者出院,随访1个月,患者恢复良好。

关键词：肋骨骨折主动脉破裂创伤性湿肺危重病护理

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

调节性细胞死亡机制概述

引用

生物学教学 2024年第2期49卷 2-7页

作者：徐豪禹娜华东师范大学教师教育学院上海200062

调节性细胞死亡是一种由基因决定的主动有序的细胞死亡形式,对其分子机制的理解是实现癌症治疗的重要突破口之一。本文介绍了目前已知的凋亡、坏死性凋亡、焦亡、铁死亡、铜死亡和双硫死亡等调节性细胞死亡类型及其机制,以期为中学生物... 详细信息

调节性细胞死亡是一种由基因决定的主动有序的细胞死亡形式,对其分子机制的理解是实现癌症治疗的重要突破口之一。本文介绍了目前已知的凋亡、坏死性凋亡、焦亡、铁死亡、铜死亡和双硫死亡等调节性细胞死亡类型及其机制,以期为中学生物学教学提供细胞死亡方面的前沿拓展素材。

关键词：凋亡铜死亡双硫死亡

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Prevalence of bacteria, fungi, and virus coinfections with SARS-CoV-2 Omicron variant among patients with severe COVID-19 in Guangzhou, China, winter 2022

引用

Biosafety and Health 2024年第2期6卷 92-97页

作者： Qinghong Fan Mengling Jiang Jun Zhang Guofang Tang Ming Gao Yingfen Wen Xizi Deng Jun Dai Honghao Lai Peng Qian Yaqing Lin Ruiying He Liya Li yueping Li Zhengtu Li Xuesong Liu Yimin Li na yu yun Lan Fengyu Hu Feng Li Institute of Infectious Diseases Guangzhou Eighth People's HospitalGuangzhou Medical UniversityGuangzhou 510440China State Key Laboratory of Respiratory Disease National Clinical Research Center for Respiratory DiseaseGuangzhou Institute of Respiratory Healththe First Affiliated Hospital of GuangzhouMedicalUniversityGuangzhou510120China Guangzhou Laboratory Guangzhou 510700China

The status of coinfection during the national outbreak of severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)Omicron BA.5.2 or BF.7 in China in the winter of 2022,which is suspected to contribute substantially to the overloaded severe cases,needs to be investigated.We analyzed the coinfection status of 385 severe patients infected with the Omicron variant in Guangzhou using metagenomic sequencing.We found that 317(82.3%)patients were coinfected with at least one additional pathogen(s),including bacteria(58.7%),fungi(27.1%)and viruses(73.5%).Pseudomonas aeruginosa(P.aeruginosa)(24.2%),Staphylococcus aureus(S.aureus)(14.0%),andKlebsiella pneumoniae(K.pneumonia)(13.4%)ranked as the top three coinfected bacteria.Aspergillus fumigatus(A.fumigatus)(39.5%),Pneumocystis jirovecii(P.jirovecii)(24.4%)andCanidia albicans(C.albicans)(22.1%)were the top three coinfected fungi.Epstein-Barr virus(EBV)(63.1%),Human herpesvirus 7(HHV-7)(34.8%),and Herpes simplex virus 1(HSV-1)(32.6%)were the top three coinfected viruses.Of note,the detection of multiple coinfections of potential pathogenic bacteria,fungi,and viruses,despite lacking consistent patterns,highlighted a complicated synergistic contribution to disease severity.Our study presents the most comprehensive spectrum of bacterial,fungal,and viral coinfections in Omicron-associated severe coronavirus disease 2019(COVID-19),implying that the coinfection of conditional pathogens might synergistically deteriorate the Omicron infection outcomes.

关键词： SARS-CoV-2 Omicron BA.5.2 Omicron BF.7 Coinfection Severeinfection

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Phylogenetic relationship of Podocopida (Ostracoda: Podocopa) based on 18S ribosomal Dna sequences

引用

Acta Oceanologica Sinica 2006年第2期25卷 99-108页

作者： yu na ZHAO Meiying CHEN Liqiao YANG Pin School of Life Science East China Normal UniversityShanghai 200062China

Nucleotide sequences from 18S rDna of 11 ostracodes, which represent four suborders and six superfamilies of podocopidan, were determined. The phylogenetic relationships were analyzed based on three kinds of methods (maximum-likelihood, maximum-parsimony, and neighbor-joining), and the three topologies gained were basically similar. The results have showed that (1) a monophyletic Podocopida was supported strongly; (2) the phylogenetic relationships of four suborders were (Darwinulocopina plus (Bairdiocopina plus (Cytherocopina plus Cypridocopina))), which indicated that a close relationship between Cytherocopina and Cypridocopina, and Darwinulocopina had separated early from the main podocopinan; (3) Cypridocopinan formed a monophyletic group, among which the phylogenetic relationship of three superfamilies was (Cypridoidea plus (Macrocypridoidea plus Pontocypridoidea)).

关键词： 18S rDna nuclear gene molecular phylogeny Podocopida Ostracoda

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

外贸内卷化、出口退税与企业出口国内附加值率

引用

产经评论 2024年第2期15卷 143-160页

作者：于李娜张成娟中国海洋大学

长期以来,我国出口企业面临来自国内外同类企业的双重竞争,容易出现为抢夺代工订单和抢占市场份额而竞相压价、生产低端同质产品的“外贸内卷化”现象,这是推动我国经贸高质量发展亟需探讨的问题。以微观企业为研究对象,研究外贸内卷化... 详细信息

长期以来,我国出口企业面临来自国内外同类企业的双重竞争,容易出现为抢夺代工订单和抢占市场份额而竞相压价、生产低端同质产品的“外贸内卷化”现象,这是推动我国经贸高质量发展亟需探讨的问题。以微观企业为研究对象,研究外贸内卷化对企业出口国内附加值率的影响,进而分析出口退税政策在这一过程中是否能够起到调节作用。结果表明:外贸内卷化对企业出口国内附加值率有负面影响,而出口退税政策有助于缓解这种负面影响。机制分析发现,出口退税通过企业利润提升效应和一般贸易占比提升效应帮助企业缓解外贸内卷化的负面影响。因此,应进一步完善出口退税政策,实行不完全且有差别的增值税退税政策,以更好地发挥其引导企业出口行为选择的作用,走出外贸内卷化困境。

关键词：外贸内卷化出口退税调节效应出口国内附加值率

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：