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Formation of Fine Spheroidal Microstructure of Semi-Solid Al—Zn—Mg—Cu Alloy by Hyperthermally and Subsequent Isothermally Reheating

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Journal of Materials Science & Technology 2013年第10期29卷 979-982页

作者： Gang Chen Jufu Jiang Zhiming Du qi cao Hongwei Li Xin Zhang School of Materials Science and Engineering Harbin Institute of Technology Technology Institute Beijing North Vehicle Group Corporation Beijing Engineering Research Center for Advanced Manufacturing and Elevation of Special Vehicle Parts

The high strength 7xxx series aluminium alloys are usually difficult to be prepared as semi-solid feedstock, because some dispersoid particles （soluble only in liquid） could pin at grain and subgrain boundary to make the alloy difficultly recrystallise. In this work, a novel multistep reheating regime is developed for recrystallisation and partial melting （RAP） route to prepare fine spheroidal microstructure of semi-solid AI-Zn- Mg-Cu alloy. After reheating to 665 ℃, holding for 4 min and subsequent isothermally holding at 620 ℃ with total heating time of 15 min, fine spheroidal microstructures with grain size of-40 μm were prepared without remained unrecrystallised grains and directionality, which are much finer than the conventionally obtained microstructures （-100 μm）.

关键词： Al-Zn--Mg--Cu alloys Microstructure Semisolid Recrystallization

Understanding changes in volatile compounds and fatty acids of Jincheng orange peel oil at different growth stages using GC-MS

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Journal of Integrative Agriculture 2023年第7期22卷 2282-2294页

作者： XIE Jiao cao qi WANG Wen-jun ZHANG Hong-yan DENG Bing The Key Laboratory of Environmental Pollution Monitoring and Disease Control Ministry of Education/Guizhou Provincial Engineering Research Center of Ecological Food InnovationSchool of Public HealthGuizhou Medical UniversityGuiyang 550025P.R.China College of Food Science/Food Storage and Logistics Research Center Southwest UniversityChongqing 400715P.R.China

Jincheng orange(Citrus sinensis Osbeck)is widely grown in Chongqing,China,and is commonly consumed because of its characteristic aroma contributed by the presence of diverse volatile *** changes in aroma during the development and maturation of fruit are indicators for ripening and harvest ***,the influence of growth stages on the volatile compounds in Jincheng orange remains *** addition,volatiles originate from fatty acids,most of which are the precursors of volatile *** this basis,gas chromatography-mass spectrometry(GC-MS)was performed to elaborate the changes in volatile constituents and fatty acids as *** study tested proximately 60 volatiles and 8 fatty acids at 9 growth and development stages(AF1-AF9).Of those compounds,more than 92.00%of total volatiles and 87.50%of fatty acids were terpenoid and saturated fatty acids,*** shown in the PCA plot,the AF5,AF6,and AF9 stages were confirmed as completely segregated and appeared *** addition,most of the volatiles and fatty acids first increased at the beginning of the development stage,then decreased from the AF6 development stage,and finally increased at the AF9 maturity ***,the highest contents of terpenoid,alcohols,aldehydes,ketones,and saturated fatty acids in Jincheng orange peel oil were d-limonene,linalool,octanal,cyclohexanone,and stearic acid during development stages,*** results found that the growth stages significantly affected the volatile constituents and precursors in Jincheng orange peel oil.

关键词： Jincheng orange volatile compounds fatty acids growth stages

Degradation of ofloxacin using peroxymonosulfate activated by nitrogen-rich graphitized carbon microspheres:Structure and performance controllable study

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Journal of Environmental Sciences 2021年第1期33卷 10-20页

作者： Changsheng Feng Chen Chen Yu Zhu qi cao Chao Chen Caiyun Jiang Yuping Wang School of Chemistry and Material Science Jiangsu Provincial Key Laboratory of Materials cycling and Pollution ControlNanjing Normal UniversityNanjing 210046China Department of Engineering and Technology Jiangsu lnstitute of CommerceNanjing 211168China

Nitrogen-rich graphitized carbon microspheres(NGCs)with hierarchically porous were constructed by *** different heat treatment conditions,the structure,morphology and properties of NGCs were studied by using multiple characterization *** results showed that the chemical microenvironments(*** chemistry,degree of graphitization and defective,etc.)and microstructures properties(***,specific surface area,particle size,etc.)could be delicately controlled via thermal carbonization *** degradation of ofloxacin(OFLX)by NGCs activated peroxymonosulfate(PMS)was studied *** was found that the synergistic coupling effect between optimum N or O bonding species configuration ratio(graphitic N and C=O)and special microstructure was the main reason for the enhanced catalytic activity of NGC-800(calcination temperature at 800°C).Electron paramagnetic resonance(EPR)experiments and radical quenching experiments indicated that the hydroxyl(·OH),sulfate(SO4^·-)and singlet oxygen(^1O_(2))were contributors in the NGC-800/PMS *** investigation of the durability of chemical structures and surface active sites revealed that undergo N bonding species configuration reconstruction and cannibalistic oxidation during PMS activation *** used NGC-800 physicochemical properties could be recovered by heat treatment to achieve the ideal catalytic *** findings proposed a valuable insight for catalytic performance and controllable design of construction.

关键词： Peroxymonosulfate Ofloxacin degradation Carbonization temperature Carbocatalyst

雷帕霉素对蛛网膜下腔出血大鼠脑损伤的保护作用

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脑与神经疾病杂志 2025年第2期33卷 110-114页

作者：曹齐李文杰王强陈原上海交通大学医学院附属新华医院药学部

目的探讨雷帕霉素(RAP)对蛛网膜下腔出血(SAH)大鼠脑损伤的保护作用。方法制作雄性SD大鼠SAH模型,根据处理方法不同将大鼠分为假手术组(sham组)、SAH组、RAP组和三甲基腺嘌呤(3-MA)组,每组各20只。采用Morris水迷宫评估大鼠潜伏期时... 详细信息

目的探讨雷帕霉素(RAP)对蛛网膜下腔出血(SAH)大鼠脑损伤的保护作用。方法制作雄性SD大鼠SAH模型,根据处理方法不同将大鼠分为假手术组(sham组)、SAH组、RAP组和三甲基腺嘌呤(3-MA)组,每组各20只。采用Morris水迷宫评估大鼠潜伏期时间及穿越原平台次数,采用免疫组化法检测Beclin-1和LC3-Ⅱ的表达水平,采用TUNEL法评价大脑皮质细胞凋亡的严重程度,采用透射电镜观察细胞器超微结构,分析比较组间差异。结果 4组间大鼠潜伏期时间、穿越原平台次数、Beclin-1和LC3-II表达水平、神经细胞凋亡指数均有明显差异(P<0.05),潜伏期时间由短到长、穿越原平台次数由多到少、神经细胞凋亡指数由低到高均依次为sham组、RAP组、SAH组和3-MA组,Beclin-1和LC3-Ⅱ表达水平由低到高依次为sham组、3-MA组、SAH组和RAP组,组间两两比较差异均有统计学意义(P<0.05)。结论 RAP可增强自噬活性,抑制细胞凋亡,改善学习记忆功能,为临床治疗早期脑损伤(EBI)提供了一个新的思路和方法。

关键词：雷帕霉素蛛网膜下腔出血早期脑损伤自噬细胞凋亡

Hydrogen storage by liquid organic hydrogen carriers:Catalyst,renewable carrier,and technology--A review

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Carbon Resources Conversion 2023年第4期6卷 334-351页

作者： Chenyang Chu Kai Wu Bingbing Luo qi cao Huiyan Zhang Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing 210096PR China

Hydrogen has attracted widespread attention as a carbon-neutral energy source,but developing efficient and safe hydrogen storage technologies remains a huge ***,liquid organic hydrogen carriers(LOHCs)technology has shown great potential for efficient and stable hydrogen storage and *** technology allows for safe and economical large-scale transoceanic transportation and long-cycle hydrogen *** particular,traditional organic hydrogen storage liquids are derived from nonrenewable fossil fuels through costly refining procedures,resulting in unavoidable environmental *** holds great promise for the preparation of LOHCs due to its unique carbon-balance properties and feasibility to manufacture aromatic and nitrogen-doped *** to recent studies,almost 100%conversion and 92% yield of benzene could be obtained through advanced biomass conversion technologies,showing great potential in preparing biomass-based ***,the present LOHCs systems and their unique applications are introduced in this review,and the technical paths are ***,this paper provides an outlook on the future development of LOHCs technology,focusing on biomass-derived aromatic and N-doped compounds and their applications in hydrogen storage.

关键词： Liquid organic hydrogen carriers Biomass Hydrogen Catalytic pyrolysis Hydrogen storage and release

离岸人民币市场发展现状、制约因素与提升路径研究

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湖南财政经济学院学报 2025年第1期41卷 78-86页

作者：李艳丰曹绮雯何嘉慧曹瑞春袁婧鑫湖南财政经济学院财政金融学院湖南长沙410205

离岸人民币市场能有效提升人民币计价结算、交易媒介与价值储藏功能,推动人民币在国际经济往来中的国际化使用。从离岸人民币流动性供给、投融资货币职能、离岸人民币金融基础设施等方面阐述离岸人民币市场发展现状。离岸人民市场发展... 详细信息

离岸人民币市场能有效提升人民币计价结算、交易媒介与价值储藏功能,推动人民币在国际经济往来中的国际化使用。从离岸人民币流动性供给、投融资货币职能、离岸人民币金融基础设施等方面阐述离岸人民币市场发展现状。离岸人民市场发展存在人民币国际化尚处在初级阶段、在岸与离岸市场的双向循环不充分以及离岸人民币市场深度与广度不足的制约因素。由此,提出离岸人民币市场的发展路径:促进跨境贸易与投资便利化;拓展跨境金融服务丰富离岸人民币产品种类;加强金融基础设施建设以深化金融市场互联互通。

关键词：离岸人民币市场跨境金融服务金融基础设施人民币国际化

A comparative analysis of differentially expressed genes in rostral and caudal regions after spinal cord injury in rats

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Neural Regeneration Research 2022年第10期17卷 2267-2271页

作者： Xue-Min cao Sheng-Long Li Yu-qi cao Ye-Hua Lv Ya-Xian Wang Bin Yu Chun Yao Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education NMPA Key Laboratory for Research and Evaluation of Tissue Engineering Technology ProductsCo-innovation Center of NeuroregenerationNantong UniversityNantongJiangsu ProvinceChina

The initial mechanical damage of a spinal cord injury(SCI)triggers a progressive secondary injury cascade,which is a complicated process integrating multiple systems and *** is crucial to explore the molecular and biological process alterations that occur after SCI for therapy *** differences between the rostral and caudal regions around an SCI lesion have received little ***,we analyzed the differentially expressed genes between rostral and caudal sites after injury to determine the biological processes in these two segments after *** identified a set of differentially expressed genes,including Col3a1,Col1a1,Dcn,Fn1,Kcnk3,and Nrg1,between rostral and caudal regions at different time points following *** enrichment analysis indicated that these genes were involved in response to mechanical stimulus,blood vessel development,and brain *** then chose Col3a1,Col1a1,Dcn,Fn1,Kcnk3,and Nrg1 for quantitative real-time PCR and Fn1 for immunostaining *** results indicate alterations in different biological events enriched in the rostral and caudal lesion areas,providing new insights into the pathology of SCI.

关键词： biological process caudal differentially expressed genes Gene Ontology hemisection immunostaining Rattus norvegicus RNA-sequencing rostral spinal cord injury

Symmetric and antisymmetric vector solitons for the fractional quadric-cubic coupled nonlinear Schrodinger equation

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Communications in Theoretical Physics 2022年第7期74卷 1-8页

作者： Jia-Zhen Xu qi-Hao cao Chao-qing Dai Zhejiang A&F University Zhejiang 311300China

The fractional quadric-cubic coupled nonlinear Schrodinger equation is concerned,and vector symmetric and antisymmetric soliton solutions are obtained by the square operator *** relationship between the Lévy index and the amplitudes of vector symmetric and antisymmetric solitons is *** components of vector symmetric and antisymmetric solitons show a positive and negative trend with the Lévy index,*** stability intervals of these solitons and the propagation constants corresponding to the maximum and minimum instability growth rates are *** indicate that vector symmetric solitons are more stable and have better interference resistance than vector antisymmetric solitons.

关键词： fractional quadric-cubic coupled nonlinear Schrodinger equation vector symmetric solitons vector antisymmetric solitons stability

Vacuum promoted on-tissue derivatization strategy:Unravelling spatial distribution of glycerides on tissue

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Chinese Chemical Letters 2024年第12期35卷 475-481页

作者： Yu-qi cao Ying-Jie Lu Li Zhang Jing Zhang Yin-Long Guo State Key Laboratory of Organometallic Chemistry and National Center for Organic Mass Spectrometry in Shanghai Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200032China Technical Centre Shanghai Tobacco(Group)Corp.Shanghai 200082China Department of Pharmacognosy School of PharmacyNaval Medical UniversityShanghai 200433China

Matrix-assisted laser desorption ionization-mass spectrometry imaging(MALDI-MSI)has shown its capability in visualizing the spatial distribution of various kinds of endogenous ***,high quality mass imaging of low polar metabolites remains ***,a platform for sensitive matrix-assisted laser desorption ionization-mass spectrometry imaging of cholesterol and glycerides has been *** the platform,a vacuum promoted on-tissue derivatization strategy was proposed to constantly make the derivatization reaction proceed towards to the direction of *** with traditional on-tissue derivatization procedure,the strategy improved the acquired intensity of derivatized glycerides about 50%.Additionally,the mass spectrometry image reflecting the signal ratio between 3classes of glycerides was achieved to exploit the metabolic level of glycerides on tissue ***,the platform was applied to brain slices of Alzheimer’s transgenic mice,type 2 diabetes mice and normal *** difference was found in mass spectrometry images reflecting the signal ratio of multiple endogenous *** work constructed a promising platform for mapping of glycerides in tissue by mass spectrometry imaging.

关键词： Mass spectrometry imaging On-tissue derivatization Glycerides Alzheimer’s disease