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Self-assembly of graphene oxide nanosheets in t-butanol/water medium under gamma-ray radiation

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Chinese Chemical Letters 2018年第6期29卷 931-934页

作者： Weikang Wang Yihu wu Zhiwen Jiang Mozhen Wang qichao wu Xiao Zhou Xuewu Ge CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and Engineering University of Science and Technology of China Guangdong Tianan New Material Co. Ltd.

The research on the properties of graphene oxide（GO） in various media has become one of the hottest topics since GO is now the main raw material for graphene-based advanced materials. In this work, the g-ray radiation chemistry effect of GO nanosheets and their self-aggregation behavior in t-butanol/water medium were investigated. The results show that GO nanosheets are reduced and hydroxyalkylated simultaneously by the alcohol free radicals produced by the radiolysis of t-butanol/water solution under g-ray radiation. The radiation-modified GO nanosheets will self-assemble into a self-standing graphene hydrogel when the p H of the solution is lower than 2. A hydroxyl-functionalized free-standing graphene aerogel is further obtained simply by freeze-drying. This work provides not only a general self-assembly mechanism of GO nanosheets in strong acidic alcohol/water media under high energy radiation, but also a facile and economical preparation method for hydroxyalkylated graphene-based aerogel.

关键词： Graphene oxide Gamma-ray radiation t-Butanol/water solution Self-assembly Hydroxyalkylation Graphene hydrogel Graphene aerogel

Mechanisms of bone pain:Progress in research from bench to bedside

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Bone Research 2022年第3期10卷 440-453页

作者： Gehua Zhen Yuhan Fu Chi Zhang Neil C.Ford Xiaojun wu qichao wu Dong Yan Xueming Chen Xu Cao Yun Guan Department of Orthopedics Johns Hopkins UniversitySchool of MedicineBaltimoreMD 21205USA Department of Anesthesiology and Critical Care Medicine Johns Hopkins UniversitySchool of MedicineBaltimoreMD 21205USA Division of Pathology Sibley Memorial Hospital WashingtonWashingtonDC 20016USA Department of Oncology Beijing Luhe HospitalCapital Medical UniversityBeijing 100149China Department of Orthopedics Beijing Luhe HospitalCapital Medical UniversityBeijing 100149China Department of Neurological Surgery Johns Hopkins UniversitySchool of MedicineBaltimoreMD 21205USA

The field of research on pain originating from various bone diseases is expanding rapidly, with new mechanisms and targets asserting both peripheral and central sites of action. The scope of research is broadening from bone biology to neuroscience,neuroendocrinology, and immunology. In particular, the roles of primary sensory neurons and non-neuronal cells in the peripheral tissues as important targets for bone pain treatment are under extensive investigation in both pre-clinical and clinical settings. An understanding of the peripheral mechanisms underlying pain conditions associated with various bone diseases will aid in the appropriate application and development of optimal strategies for not only managing bone pain symptoms but also improving bone repairing and remodeling, which potentially cures the underlying etiology for long-term functional recovery. In this review, we focus on advances in important preclinical studies of significant bone pain conditions in the past 5 years that indicated new peripheral neuronal and non-neuronal mechanisms, novel targets for potential clinical interventions, and future directions of research.

关键词： pain clinical diseases

Conditioned medium from human dental pulp stem cells treats spinal cord injury by inhibiting microglial pyroptosis

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Neural Regeneration Research 2024年第5期19卷 1105-1111页

作者： Tao Liu Ziqian Ma Liang Liu Yilun Pei qichao wu Songjie Xu Yadong Liu Nan Ding Yun Guan Yan Zhang Xueming Chen Department of Orthopedic Surgery Beijing Luhe HospitalCapital Medical UniversityBeijingChina Department of Orthopedic Surgery Beijing Chaoyang HospitalCapital Medical UniversityBeijingChina Department of Stomatology Beijing Luhe HospitalCapital Medical UniversityBeijingChina Department of Anesthesiology and Critical Care Medicine School of MedicineJohns Hopkins UniversityBaltimoreMDUSA Department of Neurological Surgery School of MedicineJohns Hopkins UniversityBaltimoreMDUSA

Human dental pulp stem cell transplantation has been shown to be an effective therapeutic strategy for spinal cord ***,whether the human dental pulp stem cell secretome can contribute to functional recovery after spinal cord injury remains *** the present study,we established a rat model of spinal cord injury based on impact injury from a dropped weight and then intraperitoneally injected the rats with conditioned medium from human dental pulp stem *** found that the conditioned medium effectively promoted the recovery of sensory and motor functions in rats with spinal cord injury,decreased expression of the microglial pyroptosis markers NLRP3,GSDMD,caspase-1,and interleukin-1β,promoted axonal and myelin regeneration,and inhibited the formation of glial *** addition,in a lipopolysaccharide-induced BV2 microglia model,conditioned medium from human dental pulp stem cells protected cells from pyroptosis by inhibiting the NLRP3/caspase-1/interleukin-1β*** results indicate that conditioned medium from human dental pulp stem cells can reduce microglial pyroptosis by inhibiting the NLRP3/caspase-1/interleukin-1βpathway,thereby promoting the recovery of neurological function after spinal cord ***,conditioned medium from human dental pulp stem cells may become an alternative therapy for spinal cord injury.

关键词： BV2 conditioned medium dental pulp stem cells GSDMD microglia neuroinflammation NLRP3 pyroptosis spinal cord injury

Neural mechanism of smoking prohibited labels in smokers: a study combing EEG and fMRI

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Neural mechanism of smoking prohibited labels in smokers: a ...

基于Zabbix的智能运维系统与既有应用系统数据互通接入方案

中国神经科学学会第十二届全国学术会议

作者： qichao wu Wanwan Lv Ying Wang Zhengde Wei Xiaochu Zhang CAS Key Laboratory of Brain Function and Disease School of Life Science University of Science and Technology of China School of Humanities and Social Science University of Science and Technology of China Center for Biomedical Engineering School of Information Science and TechnologyUniversity of Science and Technology of China Center of Medical Physics and Technology Hefei Institutes of Physical Science CAS

Objective Smoking prohibited labels（SPLs） has been widely used to reduce tobacco consumption with the focus on enhancing prohibition. However, SPLs include not only the prohibited information but the smoking-related information which can induce craving and facilitate smoking behavior in smokers. Is there a process of smokingrelated information in SPLs? If is, it is prior to or lags behind the process of prohibited information. Methods The brain regions indicating the prohibition（prohibited, nonprohibited） by smoke（smoking, nonsmoking） interaction based on functional magnetic resonance imaging（fMRI） were placed as regional sources to the source analysis of the electroencephalograph（EEG）. Results（1） Significant interaction effects were observed in the right ventromedial prefrontal cortex（r VMPFC）, left posterior cingulate cortex（l PCC） and left dorsolateral prefrontal cortex（l DLPFC）.（2） Source analysis indicated that l PCC and r VMPFC contributed to the smoking-related information while l DLPFC and r VMPFC were responsible for the prohibited information.（3） The activation of l PCC were prior to that of l DLPFC. Conclusion The smoking-related information was processed before the prohibited information in SPLs by smokers which should be taken seriously.

关键词： Smoking prohibited labels fMRI EEG source analysis smoking-related information

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城市轨道交通研究 2024年第S1期27卷 106-109,115页

作者：吴琪超上海地铁维护保障有限公司通号分公司上海200235

[目的]针对当前城市轨道交通智能运维系统与既有应用系统之间接口协议多样、数据互通难的问题,提出一种基于Zabbix的通用型解决方案。[方法]以上海轨道交通蒲汇塘线网数字化运维中心中具有告警集中显示功能的智能运维看板(简称“设备看... 详细信息

[目的]针对当前城市轨道交通智能运维系统与既有应用系统之间接口协议多样、数据互通难的问题,提出一种基于Zabbix的通用型解决方案。[方法]以上海轨道交通蒲汇塘线网数字化运维中心中具有告警集中显示功能的智能运维看板(简称“设备看板”)为例,分析了Zabbix与设备看板之间数据互通的可行性,介绍了Zabbix与设备看板之间数据互通的设计方案,测试验证了设计方案的可行性。[结果及结论]通过搭建满足设备看板数据结构要求的数据表、设计告警数据推送脚本,实现了既有应用系统与设备看板之间的数据互通。测试结果表明,该设计方案能够满足既有应用系统告警集中显示、及时推送,可提高维护人员的故障感知度。

关键词：城市轨道交通智能运维数据互通 Zabbix

氢化TiO_(2)包覆核壳C/Fe_(3)O_(4)@rGO锂离子电池阳极材料

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材料工程 2023年第5期51卷 129-137页

作者：吴启超雍达明钱琛金党琴蒋荣立扬州工业职业技术学院化学工程学院江苏扬州225127 中国矿业大学化学工程学院江苏徐州221116

通过一种简便的方法制备氧空位缺陷的氢化TiO_(2)包覆核壳结构C/Fe_(3)O_(4)@rGO(H-TiO_(2)/C/Fe_(3)O_(4)@rGO)复合材料,作为锂离子电池(lithium-ion batteris,LIBs)高性能阳极材料。TiO_(2)在Li+脱嵌过程中体积膨胀系数约为4%,可缓解Fe_(3)O_(4)在充放电过程中的体积膨胀,提高阳极材料结构的稳定性。同时,通过氢化处理改善TiO_(2)较低的电导率(约1×10^(-12) S·m^(-1))。H-TiO_(2)/C/Fe_(3)O_(4)@rGO在0.3 A·g^(-1)的电流密度下循环200周次后比容量为867 mAh·g^(-1),在1 A·g^(-1)的电流密度下循环700周次的比容量为505 mAh·g^(-1),这些结果远大于石墨的理论容量(372 mAh·g^(-1)),表明H-TiO_(2)/C/Fe_(3)O_(4)@rGO复合材料具有用作LIBs阳极材料的前景。

关键词：锂离子电池 Fe_(3)O_(4) 氢化TiO_(2) 碳材料包覆

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氧化锆负载硒催化苯酚氧化反应

有机化学 2024年第4期44卷 1343-1347页

作者：雍达明田杰杨瑞洪吴启超张旭扬州工业职业技术学院化工学院江苏扬州225127 扬州大学化学化工学院江苏扬州225002

氧化锆负载硒可以由易得的二氧化锆与硒氢化钠反应制备.研究表明,该材料可催化苯酚氧化,制备对苯醌.与传统硒催化氧化反应相比,该反应无需使用化学氧化剂,而是可以直接利用分子氧为氧化剂,从而显著降低合成成本,并且相对安全.氧化锆负... 详细信息

氧化锆负载硒可以由易得的二氧化锆与硒氢化钠反应制备.研究表明,该材料可催化苯酚氧化,制备对苯醌.与传统硒催化氧化反应相比,该反应无需使用化学氧化剂,而是可以直接利用分子氧为氧化剂,从而显著降低合成成本,并且相对安全.氧化锆负载硒是一种稳定的含硒材料,可以反复多次回收利用而不会失活.其卓越的催化氧化性能有望应用于工业.

关键词：硒氧化锆催化氧化苯酚对苯醌

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超高倾斜柱模板及支撑体系设计探讨

山西建筑 2023年第9期49卷 71-74页

作者：吴奇超中船第九设计研究院工程有限公司上海200063

通过理论推导得出新浇混凝土对倾斜模板体系侧压力和对垂直模板体系侧压力的关系,在此基础上,对某歌剧院工程项目中的典型超高倾斜柱模板及支撑体系进行研究,通过相关规范内容及力学计算分析、构件设计,提供超高倾斜柱模板及支撑体系的... 详细信息

通过理论推导得出新浇混凝土对倾斜模板体系侧压力和对垂直模板体系侧压力的关系,在此基础上,对某歌剧院工程项目中的典型超高倾斜柱模板及支撑体系进行研究,通过相关规范内容及力学计算分析、构件设计,提供超高倾斜柱模板及支撑体系的设计方案。

关键词：新浇混凝土倾斜柱侧压力支撑体系

饲养密度对北方地区断奶羔羊生长性能及生理生化的影响

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农业工程学报 2024年第16期40卷 211-219页

作者：吴启超张高振简保权左权邓先德农业农村部规划设计研究院北京100125 农业农村部农业设施结构设计与智能建造重点实验室北京100125 新疆农业大学动物科学学院乌鲁木齐830052

为探究中国北方断奶羔羊规模化设施养殖最适饲养密度,该研究以72只初始体质量为(14.78±2.15)kg的雄性澳洲白羔羊为研究对象,按不同的饲养密度(0.875、0.625、0.375 m~2/只)分为3个试验组,每组设3个重复,饲喂由玉米秸秆、玉米、浓缩料... 详细信息

为探究中国北方断奶羔羊规模化设施养殖最适饲养密度,该研究以72只初始体质量为(14.78±2.15)kg的雄性澳洲白羔羊为研究对象,按不同的饲养密度(0.875、0.625、0.375 m~2/只)分为3个试验组,每组设3个重复,饲喂由玉米秸秆、玉米、浓缩料和预混料组成的全混日粮,分析不同饲养密度对断奶羔羊生长性能、血清生理生化和瘤胃微生物发酵的影响。结果显示,随着饲养密度增加,断奶羔羊的平均日增质量和日平均采食量明显增加,致使料体质量比下降,其中0.625 m~2/只的料体质量比最低(P <0.05);干物质和粗蛋白的表观消化率显著上升(P <0.01)。同时,血清总胆固醇和甘油三酯的浓度呈线性上升的趋势,而免疫因子和抗氧化水平显著增加(P <0.05);此外,瘤胃发酵中丙酸浓度呈线性趋势增加,乙酸/丙酸明显下降(P <0.05);且显著增加了瘤胃微生物unclassified_c_Clostridia的相对丰度,降低了Olsenella的相对丰度(P <0.05)。由此表明,适宜的饲养密度(0.625 m~2/只)可提高断奶羔羊的生长性能、消化率和增强瘤胃丙酸发酵,而较高的饲养密度(0.375 m~2/只)则会对断奶羔羊的免疫、抗氧化和瘤胃微生物发酵产生不利影响。因此,该研究建议北方地区断奶羔羊的饲养密度为0.625 m~2/只,并为断奶羔羊规模化标准化设施养羊提供工程技术参数依据。

关键词：饲养密度断奶羔羊瘤胃发酵生长性能瘤胃微生物