检索结果-南通市图书馆

Conversion of Lignin into Porous Carbons for High-Performance Supercapacitors via Spray Drying and KOH Activation: Structure-Properties Relationship and Reaction Mechanism

引用

Journal of Renewable Materials 2024年第7期12卷 1207-1218页

作者： Shihao Feng qin ouyang Jing Huang Xilin Zhang Zhongjun Ma Kun Liang qing Huang Zhejiang Key Laboratory of Data-Driven High-Safety Energy Materials and Applications Ningbo Key Laboratory of Special Energy Materials and ChemistryNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201China Engineering Laboratory of Advanced Energy Materials Qianwan Institute of CNITECHNingbo315336China School of Physics Henan Normal UniversityXinxiang453007China School of Environment Henan Normal UniversityXinxiang453007China

Lignin-derived porous carbons have emerged as promising electrode materials for ***,the challenge remains in designing and controlling their structure to achieve ideal electrochemical performance due to the complex molecular structure of lignin and its intricate chemical reactions during the activation *** this study,three porous carbons were synthesized from lignin by spray drying and chemical activation with vary-ing KOH *** speciﬁc surface area and structural order of the prepared porous carbon continued to increase with the increase of the KOH ***-mass spectrometry(TG-MS)was employed to track the molecular fragments generated during the pyrolysis of KOH-activated lignin,and the mechanism of the thermochemical conversion was *** the thermochemical conversion of lignin,KOH facili-tated the removal of H2 and CO,leading to the formation of not only more micropores and mesopores,but also more ordered carbon *** pore structure exhibited a greater impact than the carbon structure on the electrochemical performance of porous *** optimized porous carbon exhibited a capacitance of 256 F g-1 at a current density of 0.2 A g-1,making it an ideal electrode material for high-performance supercapacitors.

关键词： Lignin porous carbon KOH activation mechanism supercapacitor

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

数字经济、人才集聚与长三角高质量发展

引用

南昌大学学报（人文社会科学版） 2024年第1期55卷 45-55页

作者：欧阳海琴江西师范大学财政金融学院江西南昌330022

基于空间杜宾模型、空间调节模型,选取2010—2021年长三角41个地级以上城市数据,可以分析数字经济对长三角高质量发展影响的直接效应、空间效应及其衰减特征和人才集聚调节效应。研究结果显示:数字经济对长三角高质量发展有显著为正的... 详细信息

基于空间杜宾模型、空间调节模型,选取2010—2021年长三角41个地级以上城市数据,可以分析数字经济对长三角高质量发展影响的直接效应、空间效应及其衰减特征和人才集聚调节效应。研究结果显示:数字经济对长三角高质量发展有显著为正的直接效应和空间效应,且在中心城市和外围城市呈现异质性。空间效应具有衰减特征。当地理距离在500 km以内,空间效应逐渐增强;在600—800 km之间,空间效应逐渐减弱;大于800 km,空间效应不显著。人才集聚有显著的正向调节作用。提升人才集聚度有助于增强数字经济对长三角高质量发展的直接效应和空间效应。

关键词：数字经济高质量发展长三角空间杜宾模型空间调节模型

来源：

维普期刊数据库

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

甘蔗收获机多路阀阀芯的温升及热变形仿真分析

引用

液压与气动 2024年第4期48卷 98-108页

作者：王大宇廖国陆欧阳崇钦中国工程机械工业协会北京100176 广西大学机械工程学院广西南宁530004

多路阀是甘蔗收获机械液压系统的核心元件,用于控制多个工作装置的协同作业。针对其阀口压差变化大,节流温升明显,易造成阀芯变形卡滞的问题,对多路阀阀芯进行了流固热耦合仿真研究。利用Design Model软件抽取对应流道,并建立不同开度... 详细信息

多路阀是甘蔗收获机械液压系统的核心元件,用于控制多个工作装置的协同作业。针对其阀口压差变化大,节流温升明显,易造成阀芯变形卡滞的问题,对多路阀阀芯进行了流固热耦合仿真研究。利用Design Model软件抽取对应流道,并建立不同开度的多路阀流场仿真模型,导入ANSYS Workbench平台进行不同工况下的流固热耦合仿真,分析对比了双U形和三角形节流槽在不同开度、不同进出口压差工况下,多路阀内部流场的流体速度、阀芯温度及变形的情况。结果表明:双U形、三角形节流槽阀芯最高温度始终在节流槽处;随着阀进出口压差增加,油液的最大流速以及两种节流槽型阀芯的最高温度和最大形变量增大,但三角节流槽型阀芯变形相对较小;随着阀口开度的增加,三角节流槽型阀芯温度及最大形变量均小于双U形节流槽阀芯;三角节流槽型阀芯的最大形变量较双U节流槽型阀芯小25.1%。为农业机械多路阀阀芯节流槽设计提供了理论依据。

关键词：甘蔗收获机多路阀流固热耦合热变形

来源：

维普期刊数据库

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

环境规制与低碳经济发展——产业结构优化视角

引用

经济论坛 2024年第8期 98-110页

作者：欧阳勤王海娣广东白云学院应用经济学院广东广州510450

产业结构优化是我国实现降碳减排绿色发展的重要抓手,文章在构建环境规制-产业结构优化-低碳经济(LCE)转型的逻辑框架基础上,进一步结合中介效应模型与面板门槛模型考察产业结构优化过程中环境规制对LCE发展的传导机制与异质性。研究发... 详细信息

产业结构优化是我国实现降碳减排绿色发展的重要抓手,文章在构建环境规制-产业结构优化-低碳经济(LCE)转型的逻辑框架基础上,进一步结合中介效应模型与面板门槛模型考察产业结构优化过程中环境规制对LCE发展的传导机制与异质性。研究发现:(1)环境规制对产业结构优化起到进入壁垒机制与技术创新机制双重作用,且呈“U”型关系;(2)产业结构优化对LCE发展的影响取决于经济规模效应、技术效应及能源结构效应的叠加;(3)产业结构优化在环境规制影响LCE发展过程中存在“中介效应”与“调节效应”;(4)LCE转型时间路径模拟分析阐明,在实现环境污染区域协同规制的基础上,产业结构优化调整有助于减轻低碳转型代价,且严厉的碳减排约束效应可显著降低碳排放量。文章从产业结构优化视角拓展了LCE理论体系,为实现LCE转型提供良好策略。

关键词：环境规制低碳经济产业结构优化模拟分析

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

A clinical trial of combined use of rosiglitazone and 5-aminosalicylate for ulcerative colitis

引用

World Journal of Gastroenterology 2008年第1期14卷 114-119页

作者： Hong-Liang Liang qin ouyang Department of Gastroen-terology West China Hospital Sichuan University Chengdu610041 Sichuan Province China

AIM: To investigate the therapeutic effects of the combined use of rosiglitazone and aminosalicylate on mild or moderately active ulcerative colitis (UC).METHODS: According to the national guideline for diagnosis and treatment of inflammatory bowel disease (IBD) in China, patients with mild or moderately active UC in our hospital were selected from July to November, 2004. Patients with infectious colitis, amoebiasis, or cardiac, renal or hepatic failure and those who had received corticosteroid or immunosuppressant treatment within the last month were excluded. Following a quasi-randomization principle, patients were allocated alternatively into the treatment group (TG) with rosiglitazone 4 mg/d plus 5-ASA 2 g/d daily or the control group (CG) with 5-ASA 2 g/d alone, respectively, for 4 wk. Clinical changes were evaluated by Mayo scoring system and histological changes by Truelove-Richards' grading system at initial and final point of ***: Forty-two patients completed the trial, 21 each in TG and CG. The Mayo scores in TG at initial and final points were 5.87 (range: 4.29-7.43) and 1.86 (range: 1.03-2.69) and those in CG were 6.05 (range: 4.97-7.13) and 2.57 (range: 1.92-3.22) respectively. The decrements of Mayo scores were 4.01 in TG and 3.48 in CG, with a remission rate of 71.4% in TG and 57.1% in CG, respectively. Along with the improvement of disease activity index (DAI), the histological grade improvement was more significant in TG than in CG (P < 0.05).CONCLUSION: Combined treatment with rosiglitazone and 5-ASA achieved better therapeutic effect than 5-ASA alone without any side effects. Rosiglitazone can alleviate colonic inflammation which hopefully becomes a novel agent for UC treatment.

关键词： Peroxisome proliferators-activated receptor γ Rosiglitazone Ulcerative colitis

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

定点零售药店纳入门诊统筹管理政策对利益相关者的影响分析

引用

中国卫生政策研究 2024年第3期17卷 17-23页

作者：丁瑞琳颜建周欧阳沁李馨雨邵蓉中国药科大学国家药物政策与医药产业经济研究中心江苏南京211198

目的:为完善定点零售药店纳入门诊统筹管理政策提供依据。方法:基于利益相关者理论,结合文献综述、定性访谈分析定点零售药店纳入门诊统筹管理政策的实施对利益相关者的影响。结果:理想层面,定点零售药店纳入门诊统筹管理政策的顺利实... 详细信息

目的:为完善定点零售药店纳入门诊统筹管理政策提供依据。方法:基于利益相关者理论,结合文献综述、定性访谈分析定点零售药店纳入门诊统筹管理政策的实施对利益相关者的影响。结果:理想层面,定点零售药店纳入门诊统筹管理政策的顺利实施能够缓解职工医保个人账户改革所带来的冲击,缓解医疗机构就诊压力,提升参保人购药的便利性。然而,受制于政策设计不完善、配套措施跟进不及时等因素,短期内政策产生的实际效果与理想状态存在差异。讨论和建议:医保部门持续收集政策实施的相关反馈,不断优化政策设计;完善政策时以参保人为核心,兼顾多方主体利益;充分了解相关主体的特点和利益关系,强化医保基金监管。

关键词：定点零售药店门诊统筹利益相关者影响

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

花生与坚果过敏的机制、管理措施及食品工业应对策略研究进展

引用

食品安全质量检测学报 2024年第5期15卷 34-42页

作者：欧阳芹芹聂超郭海英王蕊刘蓉中国农业大学营养与健康系北京100083

花生和坚果是全球各种美食中不可或缺的一部分,但它们却是最常见的食物致敏原之一,过敏反应从轻微的症状(如荨麻疹和腹痛)到严重的过敏反应(如呼吸困难、血压突然下降和意识丧失)。花生和坚果过敏的患病率在全世界范围内以惊人的速度增... 详细信息

花生和坚果是全球各种美食中不可或缺的一部分,但它们却是最常见的食物致敏原之一,过敏反应从轻微的症状(如荨麻疹和腹痛)到严重的过敏反应(如呼吸困难、血压突然下降和意识丧失)。花生和坚果过敏的患病率在全世界范围内以惊人的速度增长,成为一个重大的公共卫生问题。花生和坚果的过敏问题需要采取多学科方法来解决,需要持续研究免疫机制、制定预防策略以及改进食品加工工艺。本文概述了花生和坚果中的主要致敏原,以及其引发的复杂免疫反应,探讨了检测和治疗花生和坚果过敏方面取得的进展,以及旨在降低过敏风险的食品加工和标签实践的不断发展。本文旨在为花生和坚果过敏患者以及食品加工行业提供借鉴,为花生和坚果过敏的预防和诊断提供参考。

关键词：花生坚果过敏机制致敏原食品标签食品加工

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

Significance of antineutrophil cytoplasmic antibody in adult patients with Henoch-Schnlein purpura presenting mainly with gastrointestinal symptoms

引用

World Journal of Gastroenterology 2008年第4期14卷 622-626页

作者： Yan Zhang Yong-Kang Wu Matthew A Ciorba qin ouyang Department of Gastroenterology WestChina Hospital Sichuan University Chengdu 610041 SichuanProvince China Department of Laboratory Medicine West ChinaHospital Sichuan University Chengdu 610041 Sichuan ProvinceChina Division of Gastroenterology WashingtonUniversity School of Medicine St. Louis MO 63110 United States

AIM： To test the clinical significance of antineutrophil cytoplasmic antibody （ANCA） in evaluation of adult Henoch-Schonlein purpura （HSP） patients presenting mainly with abdominal symptoms. METHODS： Twenty-eight consecutive HSP patients who presented predominantly with abdominal symptoms were enrolled in this study. Control subjects included 27 ageand sex-matched patients with peptic ulcer disease, colon cancer, acute gastroenteritis, irritable bowel syndrome and colonic polyps. ANCA was measured by indirect immunofluorescence （IIF） in all patients, and follow-up ELISA was performed in patients with positive IIF tests. RESULTS： ANCA was detected in 9 HSP patients by IIF （2 were positive for c-ANCA and 7 were positive for p-ANCA）. No ANCA was found in the control group. The sensitivity and specificity of a positive ANCA test （either c- or p-ANCA） were 32.1% and 100% respectively. Only one out of the 9 patients with positive ANCA by IIF had positive ANCA by ELISA and the antigen was myeloperoxidase （MPO）. The patients positive for ANCA had higher HSP clinical scores, and were more likely to have renal function impairment. Patients with late purpura development were also associated with more severe clinical manifestations. CONCLUSION： A positive ANCA test is associated with more severe symptoms in HSP. After inflammatory bowel disease is excluded, a positive ANCA test provides a clue to the diagnosis of HSP presenting predominantly with abdominal symptoms.

关键词： Henoch-Schonlein purpura Antineutrophil cytoplasmic antibody Diagnosis Indirect immuno-fluorescence

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

Enantioselective[2+2]cycloaddition of 1,2-dihydroquinolines with 3-olefinic oxindoles via Brønsted acid catalysis

引用

Organic Chemistry Frontiers 2022年第6期9卷 1621-1627页

作者： Biao Wang Xiao Yan Han Zhong qin ouyang Xu Tian Key Laboratory of Molecular Target&Clinical Pharmacology and the State Key Laboratory of Respiratory Disease School of Pharmaceutical Sciences&the Fifth Affiliated HospitalGuangzhou Medical UniversityXinzaoPanyu DistrictGuangzhou511436China College of Pharmacy Third Military Medical UniversityChongqing400038China

Mutually complementary regiodivergent Brønsted acid-catalyzed atom-economical[2+2]cycloadditionand ene reactions of 1,2-dihydroquinolines with 3-olefinic oxindoles are *** the presence of achiral phosphoramide catalyst,the[2+2]cycloaddition affords products with four contiguous stereocenters in good to excellent yields(up to 95%)and with high stereoselectivities(up to>99%ee,>20:1 dr).Conversely,with a stronger Brønsted acid,the trifluoromethanesulfonic acid catalyst leads to ene reactionproducts in high yields(up to 77%).Furthermore,the mechanisms of the reactions are discussed based oncontrol experiments and DFT calculations.

关键词： catalyst cycloaddition indole

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

Numerical study on the blocking effect of skin on Flash-Ball Impact and damage assessment

引用

Defence Technology（防务技术） 2024年第3期33卷 532-545页

作者： Dihua ouyang Chunwei qin Xiaowen qin Qiantao Zhang Xingyu Liu Xi'an University of Architecture and Technology Xi'an 710055China Analysis and Testing Center Xi'an University of Architecture and TechnologyXi'an 710055China Engineering University of PAP Xi'an 710086China

To explore the response law of non-lethal large-size kinetic energy projectiles to blunt attack on skin tissue,and to evaluate the skin injury characteristics of the attacked personnel and the use safety of kinetic energy *** on the LS-DYNA simulation software,a three-layer skin simulation model and a Flash-Ball rubber bullet model are established,and the force-time and deformation-time biomechanical corridors of the Flash-Ball rubber bullet impacting human skin tissue are *** corridor curve and the energy transfer and diffusion are analyzed and *** safety evaluation of the damage caused by the rubber bullet shooting a human body at different distances is carried out using the empirical formula of the penetration ***,the safe shooting distance is *** results show that the model used in the simulation has a good correlation with the experimental data,its biomechanical corridor characteristics are different from those of conventional vehicle impact and smallsize projectile response *** energy transfer and action time of medium and low-speed impact may cause greater *** fat layer is the largest energy absorption *** minimum safe shooting distance to ensure skin tissue from penetrating damage is 15.8 m,and the limit specific kinetic energy of skin damage is 7.88 J/cm^(2).This study can be extended to the study of biomechanical response law and safety evaluation under the impact of the same type of large kinetic energy projectile,which provides an important theoretical reference for the police to use large kinetic energy projectiles to conduct safe shooting in peacekeeping operations.

关键词： KIPs Blunt strike Biomechanical response Damage analysis

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：