检索结果-南通市图书馆

Rational architecture design of yolk/double-shells Si-based anode material with double buffering carbon layers for high performance lithium-ion battery

引用

Green Energy & Environment 2021年第4期6卷 517-527页

作者： Zhenyu Wu Jing Luo Jiao peng hong Liu Baobao chang Xianyou Wang National Base for International Science&Technology Cooperation Hunan Province Key Laboratory of Electrochemical Energy Storage and ConversionSchool of ChemistryXiangtan UniversityXiangtan411105China Key Laboratory of Materials Processing and Mold of Ministry of Education Zhengzhou UniversityHenan450001China

Among the many strategies to fabricate the silicon/carbon composite,yolk/double-shells structure can be regarded as an effective strategy to overcome the intrinsic defects of Si-based anode materials for Li-ion batteries(LIBs).Hereon,a facile and inexpensive technology to prepare silicon/carbon composite with yolk/double-shells structure is proposed,in which the double buffering carbon shells are *** silicon/carbon nanoparticles with core-shell structure are encapsulated by SiO_(2)and external carbon layer,and it shows the yolk/double-shells structure via etching the SiO_(2)sacrificial *** multiply shells structure not only significantly improves the electrical conductivity of composite,but also effectively prevents the exposure of Si particles from the electrolyte ***,the yolk/double-shells structure can provide enough space to accommodate the volume change of the electrode during charge/discharge process and avoid the pulverization of Si ***,the as-prepared YDS-Si/C shows excellent performance as anode of LIBs,the reversible capacity is as high as 1066 mA h g^(-1) at the current density of 0.5 A g^(-1) after 200 *** the same time,the YDS-Si/C has high capacity retention and good cyclic ***,the unique architecture design of yolk/double-shells for Si/C composite provides an instructive exploration for the development of next generation anode materials of LIBs with high electrochemical performances and structural stability.

关键词： Silicon/carbon composite Structure design Yolk/double-shells Double buffering carbon layers Li-ion batteries

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

Direct N-gem-difluorocyclopropylation of nitro-heterocycles by utilizing gem-difluorocyclopropyl tosylate

引用

Chinese Chemical Letters 2014年第1期25卷 24-28页

作者： Wei-peng Gu Jin-hong Lin Ji-chang Xiao Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic ChemistryChinese Academy of Sciences

We have developed an efficient method to achieve N-gem-difluorocyclopropylation of N-heterocycles with the use of gem-difluorocyclopropyl tosylate as a building block under mild conditions, gem- Difluorocyclopropyl to... 详细信息

关键词： N-gem-Difluorocyclopropylation N-Heterocycles gem-Difluoracyclopropyl tosylate Building block

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

绿原酸对中性粒细胞功能及胞外诱捕网形成的影响及机制

引用

中国药理学通报 2025年第1期41卷 101-107页

作者：杨运刘娅王翠彭春红贵州中医药大学第二临床医学院贵州贵阳550025 七星关区中医妇幼集团医院贵州毕节551700 毕节市中医医院贵州毕节551700 贵州医科大学临床医学院贵州贵阳550025 贵州省人民医院呼吸与危重医学科贵州贵阳550002 国家卫健委肺脏免疫性疾病重点实验室贵州贵阳550002

目的探究绿原酸(chlorogenic acid,CGA)对中性粒细胞(neutrophil,NEU)功能及中性粒细胞胞外诱捕网(neutrophil extracellular traps,NETs)形成的影响及机制。方法从小鼠骨髓中分离并纯化NEU;将NEU与CGA共培养,通过CCK-8法筛选共培养适合的干预浓度;检测NEU迁移能力、髓过氧化物酶(MPO)以及脱颗粒弹性蛋白酶(NE)、基质金属蛋白酶9(MMP-9)的水平观察CGA对NEU功能的影响;免疫荧光法观察NETs的主要结构组蛋白H3及DNA骨架,以及检测NEU释放的游离DNA(cf-DNA)含量,观察NETs的形成情况;检测NEU产生的活性氧(ROS)水平,以确定CGA是否影响NEU释放NETs过程中的ROS的生成。结果CGA在浓度为100、200、400μmol·L^(-1)时对NEU活性有明显抑制作用(P<0.01)。与空白组(Blank)相比,CGA(100、200、400μmol·L^(-1))干预后,细胞迁移能力及MPO、NE、MMP-9分泌量增加(P<0.05),组蛋白H3及DNA骨架、cf-DNA的释放量明显增加(P<0.01),细胞产生的ROS也明显增加(P<0.01),上述作用在一定范围内具有浓度依赖性。结论CGA能够增强NEU功能及促进NETs的形成,可能与促进细胞内ROS水平增加有关。

关键词：绿原酸中性粒细胞胞外诱捕网免疫抗菌活性氧

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

中药治疗腰椎椎体间融合术后发热的炎症信号通路

引用

中国组织工程研究 2025年第21期29卷 4568-4575页

作者：方雨婷彭宏庞玉洁南阳市中医院河南省南阳市473000

背景:术后发热是后路腰椎椎体间融合后常见临床症状之一,目前没有明确的病因病机,患者术后体温易反复,病程较久,西药治疗效果欠佳,影响患者术后恢复。目的:综述总结炎症信号通路和术后发热的关联及中药防治后路腰椎椎体间融合后发热的机... 详细信息

背景:术后发热是后路腰椎椎体间融合后常见临床症状之一,目前没有明确的病因病机,患者术后体温易反复,病程较久,西药治疗效果欠佳,影响患者术后恢复。目的:综述总结炎症信号通路和术后发热的关联及中药防治后路腰椎椎体间融合后发热的机制,为研究术后发热继续探索新的治疗药物。方法:检索CNKI中国期刊全文数据库、万方数据库和PubMed数据库2006年6月至2023年12月收录的文献,中文检索词为“中药,术后发热,炎症,白细胞介素1,白细胞介素6,白细胞介素8,干扰素γ,肿瘤坏死因子,前列腺素E2,p38丝裂原活化蛋白激酶,核因子κB,Toll样受体,Janus激酶/信号转导和转录激活因子,Notch信号通路”;英文检索词为“medicinal herb,postoperative fever,inflammation,interleukin-1,interleukin-6,interleukin-8,γ-interferon,tumor necrosis factor,Prostaglandin E2,p38 mitogen-activated protein kinase,nuclear factor-κB,toll-like receptor,janus kinases/signal transducer and activator of transcription,notch signaling pathway”。阅读文章剔除研究内容不相关、质量差的文献,纳入100篇文献进行归纳总结。结果与结论:(1)手术造成软组织创伤促使机体释放炎症因子,促炎因子作用于下丘脑前部的体温调节中心,促使发热;(2)术后切口内出血及渗液等的吸收,吞噬细胞吞噬坏死细胞的蛋白分解产物后,产生内生致热原(白细胞介素、肿瘤坏死因子、干扰素等)导致发热;(3)细胞因子通过炎症信号通路发挥致炎作用,促使发热;(4)中药或中药复方可以调控炎症信号通路发挥抗炎解热作用防治术后发热;目前中药作用机制尚无定论,应深入研究阐明中医药防治术后发热的相关信号通路,运用现代技术把细胞分子技术与中医药药理作用机制联系起来,以便指导临床医生用药,促进患者术后恢复;(5)中药联合西药治疗术后发热是未来的研究热点,应充分发挥中医药优势,明确不同证型应用中药单体或有效成分提取物和中药汤剂的靶点作用机制。

关键词：中药腰椎椎体间融合术后发热炎症白细胞介素干扰素γ 肿瘤坏死因子信号通路

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 bio-inspired optical imaging method for robotic perception in turbid water

引用

Science China Technological Sciences 2025年第1期 79-81页

作者： Xudong SUN Yafeng LI peng LIN Xiaodi SHANG Xianping FU School of Information Science and Technology Dalian Maritime University College of Computer Science and Technology Qingdao University

In the realm of underwater robotics, optical imaging plays a pivotal role in many scientific researches. Due to the effects of absorption and scattering,images captured in turbid water are severely degraded. Therefore, enhancing the quality of underwater optical images stands paramount in ensuring the continued advancement and efficacy of underwater robots across its multifarious applications.

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Experimental and first-principles calculation of TiN growth mechanism on CeAlO_(3) surface in steel

引用

Journal of Iron and Steel Research International 2024年第2期31卷 452-463页

作者： Fei-hu He Jun peng Fang Zhang Yong-bin Wang hong-tao chang School of Materials and Metallurgy Inner Mongolia University of Science and TechnologyBaotou014010Inner MongoliaChina

Regular TiN is harmful to the toughness of steel,and its shape and size need to be *** the behavior of TiN precipitation on CeAlO_(3) surfaces is critical for controlling the morphology and formation process of CeAlO_(3)–TiN composite inclusions in the *** results showed that TiN had a square morphology on the CeAlO3 surface,and electron backscatter diffraction phase identification results revealed the orientation relationship between CeAlO_(3) and TiN as follows:(001)_(CeAlO_(3))//(110)_(TiN),(100)_(CeAlO_(3))/(001)_(TiN),and[010]_(CeAlO_(3))/[110]_(TiN).The CeAlO3 crystal structure was studied using the first-principles calculation method,and the adsorption and growth process of TiN on the CeAlO_(3) surface were investigated from the atomic *** calculation results indicate that there is no metallic bonding present in the CeAlO_(3) *** the low-index crystal planes of CeAlO_(3),the(110)planes terminated with O and CeAlO have the highest and lowest surface energies,respectively,with values of 0.373 and 0.051 eV/Å^(2).On the high surface energy plane of CeAlO_(3),the TiN atomic permutation structure is consistent with the arrangement of Ti and N atoms in TiN(100)or(110).For the low surface energy plane of CeAlO_(3),the Ti and N atoms are arranged in a ring-like structure.

关键词： CeAlO_(3)-TiN inclusion Orientation relationship Crystal structure First principle Surface energy

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

Preparation of Ultralow Molecular Weight Poly(vinyl chloride) with Submicrometer Particles via Precipitation Polymerization

引用

Chinese Journal of Polymer Science 2019年第7期37卷 646-653页

作者： peng Cui chang-Tong Song Xian-hong Zhang Dong Chen Yu-hong Ma Wan-Tai Yang State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing 100029China College of Material Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China

Poly(vinyl chloride), with ultralow molecular weight, produced by free radical polymerization either at high temperature or in the presence of chain transfer agents, is widely used as special resins and polymer process additives. This paper reports a new process, called self-stabilized precipitation polymerization, in which the polymerization of vinyl chloride monomer (VCM) is conducted in hydrocarbon diluents without addition of any suspending agent or emulsifier. The merits of this novel strategy include:(1) PVC resins with ultra-low number-average molecular weight (Mn) from 4000 to 15000, which is much lower than Mn of those prepared by conventional suspension and emulsion polymerizations,(2) sub-micrometer PVC particles with near spherical morphology, and (3) the very simple post-polymerization separation process. Under mild stirring, polymerization proceeds stably and smoothly. The influences of main process factors, such as solvents, initiator and monomer concentrations, polymerization time, and temperature on both particle morphology and Mn of the polymer products are investigated systematically. The molar ratio of-CH2-CHCl-/-CH=CH-CH2CHCl, a good indicator of structural defects, is about 1000/0.1 which means the low molecular weights do not result from chain transfer to the monomers. Then the mechanism of this polymerization is proposed. In summary, this novel polymerization technology provides a straightforward method for preparing PVC particulate products with low Mn.

关键词： Precipitation polymerization Vinyl chloride Ultralow molecular weight Pure product

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

The effects of hydrogen on the helium behavior in palladium

引用

Nuclear Science and Techniques 2016年第5期27卷 114-119页

作者： chang-Ning peng Electrical Engineering College Longdong University

As one candidate of tritium storage materials,palladium subjects to the damage from helium atoms introduced by the(3-decay of tritium *** mechanical properties of palladium will be greatly degraded deriving from the accumulation of helium atoms.A set of interatomic potentials has been fitted based on ab initio calculation according to the Morse *** dynamic methods are utilized to investigate the existence of H atoms on the release of helium atoms from palladium with the present fitted *** is found that hydrogen atoms play significant roles in the diffusion and release of helium *** presence of hydrogen atoms tends to obstacle the diffusion and release of helium atoms in palladium.

关键词：氦原子氢原子行为钯分子动力学存储材料机械性能莫尔斯

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

1,2,3-三氮唑衍生物的合成及其抑制幽门螺杆菌活性研究

引用

邵阳学院学报（自然科学版） 2011年第3期8卷 58-62页

作者：吴凤艳陈昌红彭立望邵阳学院生物与化学工程系湖南邵阳422000

设计并合成了15个未曾见文献报道的1-(2-(4-取代)苯氧乙基)-1H-1,2,3-三氮唑衍生物,并通过NMR、IR、MS确认了它们的结构.对合成条件进行了探讨,得出了叠氮化的最佳合成条件:卤代烃/叠氮化钠摩尔比为1:1.5,反应温度为65℃,幽门螺旋杆菌(... 详细信息

设计并合成了15个未曾见文献报道的1-(2-(4-取代)苯氧乙基)-1H-1,2,3-三氮唑衍生物,并通过NMR、IR、MS确认了它们的结构.对合成条件进行了探讨,得出了叠氮化的最佳合成条件:卤代烃/叠氮化钠摩尔比为1:1.5,反应温度为65℃,幽门螺旋杆菌(HP)体外抑制活性测试结果表明,化合物4c、5d、5k、5l对1 6株HP表现出一定的抑制活性.

关键词： 1,2,3-三氮唑合成幽门螺旋杆菌

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

Rapid and scalable preparation of highly quaternized polymer networks to achieve efficient simultaneous adsorption of iodide and pertechnetate

引用

Science China Chemistry 2025年第01期 337-349页

作者： Meiyun Xu Song Gu Fulong Chen Zhe Zhao peng Liu Daoben Hua State Key Laboratory of Radiation Medicine and Protection School of Radiological and Interdisciplinary Sciences (RAD-X) Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions Soochow University

The efficient separation of fission products,such as TcO4-and I-,holds strategic significance for the management of radioactive wastes and environmental *** this study,we propose an ultrafast strategy for scalable preparation of a highly quaternized organic network to facilitate efficient and synchronous separation of iodide and *** network can be prepared within a few minutes at room temperature,using polyethylenimine and 1,2,4,5-tetrakis（bromomethyl）benzene as building *** chlorine replacement,the network,abundantly decorated with quaternary ammonium groups （Cl@QPN）,exhibits an ultrahigh positive charge density of 7.6 mmol/*** enables the rapid and efficient enrichment of target anions through strong electrostatic Coulomb *** a result,Cl@QPN exhibits significantly higher adsorption rate constants of 0.830 g/（mg min） for ReO4-（a nonradioactive surrogate of TcO4-） and 0.677 g/（mg min） for I-compared to other ***,it possesses high adsorption capacities,reaching 1,681 mg/g for ReO4-and 917.4 mg/g for I-.Cl@QPN also demonstrates good selectivity towards target ions and shows efficient adsorption for99TcO4-.Additionally,Cl@QPN exhibits high dynamic processing capacities,handling up to 3,100 and 7,400 kg of simulated streams per kilogram of material for I-and ReO4-,respectively.

关键词：

来源：

同方期刊数据库

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：