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Enhanced performance triboelectric nanogenerator based on porous structure C/MnO_(2)nanocomposite for energy harvesting

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Nano Research 2022年第8期15卷 7163-7171页

作者： honghao zhang Ping zhang Pengfei Li Lu Deng Weikang zhang Baocheng Liu Zhengchun Yang School of Electrical and Information Engineering Tianjin UniversityTianjin 300072China School of Integrated Circuit Science and Engineering Adv.Mater.and Printed Electronics CenterTianjin Key Laboratory of Film Electronic&Communication DevicesTianjin University of TechnologyTianjin 300384China

Triboelectric nanogenerator(TENG)can realize a variety of mechanical energy collections in the environment,which has great potential in the field of wearable ***,many TENGs could rarely be satisfactory to wearable electronics promotion because of their expensive raw materials and complex manufacturing *** this study,a type of porous structure carbon powder/manganese dioxide(C/MnO_(2))nanocomposite is *** material adopts low-cost,high-yield carbon powder,can be prepared in one step through a simple,economical,and environmentally friendly hydrothermal preparation process,and has high economic *** power generation performance was obtained by modulating the charge trapping ability and storage capacity of polydimethylsiloxane@C/MnO_(2)(PDMS@C/MnO_(2))film based on variations in the weight-loading of C/MnO_(2).The maximum output voltage of carbon powder/manganese dioxide TENG(CM-TENG)is 63 V,which is 2.1 times that of PDMS-TENG and 1.86 times that of carbon powder TENG(C-TENG)and can easily light up 53 ***,CM-TENG can convert biological motion energy into electrical signals to detect human hand *** CM-TENG self-powered system can successfully drive various microelectronic devices,such as electronic watches,liquid crystal displays(LCDs),and *** study provides a reliable,low-cost,high-performance,and widely applicable electronic system that shows great potential in future fields such as wearable devices and micro-sensing systems.

关键词： porous structure carbon powder/manganese dioxide(C/MnO_(2)) nanocomposite triboelectric nanogenerator widely applicable microelectronic devices

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Cells derived from iPSC can be immunogenic -- Yes or No？

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Protein & Cell 2014年第1期5卷 1-3页

作者： Jiani Cao Xiaoyan Li Xiao Lu Chao zhang honghao Yu Tongbiao Zhao State Key Laboratory of Reproductive Biology Institute of Zoology Chinese Academy of Sciences Beijing 100101 China

The induced pluripotent stem cells （iPSCs）, derived by ectopic expression of reprogramming factors in somatic cells, can potentially provide unlimited autologous cells for regenerative medicine. In theory, the autologous cells derived from patient iPSCs should be immune tolerant by the host without any immune rejections. However, our recent studies have found that even syn- geneic iPSC-derived cells can be immunogenic in syn- geneic hosts by using a teratoma transplantation model （Nature 474：212-215, 2011）. Recently two research groups differentiated the iPSCs into different germ lay- ers or cells, transplanted those cells to the syngeneic hosts, and evaluated the immunogenicity of those cells. Both of the two studies support our conclusions that some certain but not all tissues derived from iPSCs can be immunogenic, although they claimed either ＂negli- gible＂ or ＂lack of＂ immunogenicity in iPSC derivatives （Nature 494：100-104, 2013; Cell Stem Cell 12：407-412, 2013）. To test the immunogenicity of clinically valuable cells differentiated from human iPSCs are emergenUy required for translation of iPSC technology to clinics.

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Geometric Accuracy and Energy Absorption Characteristics of 3D Printed Continuous Ramie Fiber Reinforced Thin-Walled Composite Structures

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Chinese Journal of Mechanical Engineering 2023年第6期36卷 147-158页

作者： Kui Wang Hao Lin Antoine Le Duigou Ruijun Cai Yangyu Huang Ping Cheng honghao zhang Yong Peng Key Laboratory of Traffic Safety on Track of Ministry of Education School of Traffic and Transportation EngineeringCentral South UniversityChangsha 410075China Institute de Research Dupty de Lôme Bionics GroupUniversity of South BritanyLorient F-56100France ICUBE Laboratory-CNRS University of StrasbourgStrasbourg 67000France Key Laboratory of High Efficiency and Clean Mechanical Manufacture(Ministry of Education) School of Mechanical EngineeringShandong UniversityJinan 250061China.

The application of continuous natural fibers as reinforcement in composite thin-walled structures offers a feasible approach to achieve light weight and high strength while remaining environmentally *** addition,additive manufacturing technology provides a favorable process foundation for its *** this study,the printability and energy absorption properties of 3D printed continuous fiber reinforced thin-walled structures with different configurations were *** results suggested that a low printing speed and a proper layer thickness would mitigate the printing defects within the *** printing geometry accuracy of the structures could be further improved by rounding the sharp corners with appropriate *** study successfully fabricated structures with vari-ous configurations characterized by high geometric accuracy through printing parameters optimization and path ***,the compressive property and energy absorption characteristics of the structures under quasi-static axial compression were evaluated and *** was found that all studied thin-walled structures exhibited progressive folding deformation patterns during *** particular,energy absorption process was achieved through the combined damage modes of plastic deformation,fiber pullout and ***,the com-parison results showed that the hexagonal structure exhibited the best energy absorption *** study revealed the structure-mechanical property relationship of 3D printed continuous fiber reinforced composite thin-walled structures through the analysis of multiscale failure characteristics and load response,which is valuable for broadening their applications.

关键词： Additive manufacturing Continuous fiber Biocomposite Thin-walled structure Geometric accuracy Energy absorption

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Haemorrhage risk of brain arteriovenous malformation during pregnancy and puerperium

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Stroke & Vascular Neurology 2023年第4期8卷 307-317,I0022-I0037页

作者： Junyu Liu honghao zhang Chun Luo Yuxin Guo Yifeng Li Dun Yuan Weixi Jiang Junxia Yan Department of Neurosurgery Xiangya Hospital Central South UniversityChangshaHunanChina Department of Pharmacology Kyoto University Graduate School of Medicine Faculty of MedicineKyotoJapan Department of Epidemiology and Health Statistics Central South University Xiangya School of Public HealthChangshaHunanChina Hunan Provincial Key Laboratory of Clinical Epidemiology Central South University Xiangya School of Public HealthChangshaHunanChina

Background This study aimed to assess whether pregnancy and puerperium were associated with the risk of brain arteriovenous malformation(bAVM)*** A retrospective review was conducted in Xiangya Hospital,Central South University from January 2012 to December 2021.A case-crossover design was adopted to calculate the incidence density of bAVM-related haemorrhage among female patients in risk(pregnancy and puerperium)and control(non-pregnancy and non-puerperium)periods,according to four scenarios observed in different populations scenario I:patients with haemorrhagic bAVM of all ages;scenario II:patients with haemorrhagic bAVM of all ages,with at least one previous pregnancy;scenario III:patients with haemorrhagic bAVM who are of reproductive age(15-45 years);scenario IV:patients with haemorrhagic bAVM of reproductive age(15-45 years),with at least one previous ***,a comprehensive literature aggregation(up to April 2022)was performed for evidence *** Among the 311 female patients with haemorrhagic bAVM,a significant haemorrhage risk during pregnancy and puerperium was found in Scenarios I(relative risk[RR],2.08;95%CI,1.28 to 3.39),II(RR,3.21;95%CI,1.95 to 5.31)and IV(RR,2.92;95%CI,1.73 to 4.93);however,a suggestive risk was found in scenario III(RR,1.62;95%CI,0.99 to 2.67).Evidence synthesis revealed a consistent haemorrhage risk among patients of all ages(RR,3.15;95%CI,1.93 to 5.15)and those of reproductive age(RR,1.29;95%CI,0.89 to 1.86).Conclusion Compared with most previous studies,a higher but relatively moderate risk for bAVM-related haemorrhage was identified during pregnancy and *** prevention and treatment strategies should be preferred when neurosurgeons make clinical decisions.

关键词： pregnancy malformation prevention

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2-吲哚甲醇平台分子参与的催化不对称反应研究进展

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有机化学 2022年第10期42卷 3351-3372页

作者：张洪浩石枫常州大学石油化工学院江苏常州213164 江苏师范大学化学与材料科学学院江苏徐州221116

吲哚骨架构成了众多天然产物、药物、农药、功能材料的核心结构单元,所以,手性吲哚类化合物的高效、高对映选择性合成已经成为有机化学领域的重要研究内容之一.由于传统的吲哚反应性单一,其参与的催化不对称反应类型有限,导致所构建的... 详细信息

吲哚骨架构成了众多天然产物、药物、农药、功能材料的核心结构单元,所以,手性吲哚类化合物的高效、高对映选择性合成已经成为有机化学领域的重要研究内容之一.由于传统的吲哚反应性单一,其参与的催化不对称反应类型有限,导致所构建的手性吲哚骨架的类型单一.为了解决这些挑战性问题,化学工作者通过在吲哚环上引入简单的官能团,得到一系列官能团化的吲哚衍生物,即吲哚类平台分子,作为构建手性吲哚骨架的高效合成砌块.其中,2-吲哚甲醇是一类重要的平台分子,其设计思路是通过在吲哚环的C2位引入羟甲基来改变吲哚环的反应性和反应位点.该类平台分子既可以作为亲电试剂,又可以作为亲核试剂,还可以作为多碳合成砌块参与催化不对称反应.所以,2-吲哚甲醇平台分子的设计与开发,为手性吲哚类化合物的高效、高对映选择性合成提供了新策略.归纳并评述了该类平台分子参与的催化不对称反应的研究进展,将为新型吲哚类平台分子的设计与应用提供新的思路.

关键词：手性吲哚化学催化不对称反应平台分子吲哚甲醇

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基于钯催化下烯丙基C(sp^(3))—H活化的不对称(4+1)串联环化反应

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有机化学 2024年第1期44卷 318-320页

作者：张洪浩石枫常州大学石油化工学院江苏常州213164 江苏师范大学化学与材料科学学院江苏徐州221116

催化不对称串联反应可以在一步操作中发生两个或多个连续的反应,实现多个化学键的有序断裂和重组,立体选择性地高效构建结构复杂多样的手性分子[1].该类反应原子经济性高、步骤简洁、立体选择性优异,被广泛地应用于有机合成中.新颖的催... 详细信息

催化不对称串联反应可以在一步操作中发生两个或多个连续的反应,实现多个化学键的有序断裂和重组,立体选择性地高效构建结构复杂多样的手性分子[1].该类反应原子经济性高、步骤简洁、立体选择性优异,被广泛地应用于有机合成中.新颖的催化不对称串联反应的设计和开发已成为有机化学前沿研究领域之一.过渡金属催化的不对称烯丙基取代反应是高选择性构建手性中心的高效策略,目前已取得了长足的发展[2].烯丙基底物与两性离子试剂的不对称环化反应可以构建具有高合成价值的手性烯基环状骨架,但通过传统的烯丙基取代反应来实现该转化存在较大的挑战(Scheme 1).

关键词：立体选择性手性中心手性分子有机化学钯催化过渡金属催化烯基原子经济性

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The Preliminary Study on Screening and Application of Phthalic Acid-Degrading Bacteria

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Advances in Microbiology 2024年第4期14卷 226-239页

作者： honghao zhang Lin Yang Rubing Xu Yuxiao Sun Yong Yang Yanyan Li College of Life Sciences Hubei University Wuhan China Hubei Academy of Tobacco Science Wuhan China Xuan’ en Branch Company of Enshi Tobacco Corporation Enshi China

Phthalic acid is a main pollutant, which is also an important reason for the continuous cropping effect of tobacco. In order to degrade the phthalic acid accumulated in the environment and relieve the obstacle effect of tobacco continuous cropping caused by the accumulation of phthalic acid in the soil. In this study, phthalate degrading bacteria B3 is screened from continuous cropping tobacco soil. The results of biochemical identification and 16sDNA comparison show that the homology between degrading bacterium B3 and Enterobacter sp. is 99%. At the same time, the growth of Enterobacter hormaechei subsp. B3 and the degradation of phthalic acid under different environmental conditions are studied. The results show that the environment with a temperature of 30˚C, PH of 7, and inoculation amount of not less than 1.2%, which is the optimal growth conditions for Enterobacter sp. B3. In an environment with a concentration of phthalic acid not exceeding 500 mg/L, Enterobacter sp. B3 has a better effect on phthalic acid degradation, and the degradation rate can reach 77% in 7 d. The results of indoor potting experiments on tobacco show that the degradation rate of phthalic acid by Enterobacter B3 in the soil is about 45%, which can reduce the inhibitory effect of phthalic acid on the growth of tobacco seedlings. This study enriches the microbial resources for degrading phthalic acid and provides a theoretical basis for alleviating tobacco continuous cropping obstacles.

关键词： Phthalic Acid Degrading Bacteria Rhizosphere Soil

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Advances in Research on Synthetic Microbial Communities

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Advances in Bioscience and Biotechnology 2024年第10期15卷 602-620页

作者： Lin Yang honghao zhang Jaixin Liu Guotao Hang Yong Yang Yanyan Li Haibo Xiang College of Life Sciences Hubei University Wuhan China State Key Laboratory of Biocatalysis and Enzyme Engineering College of Life Sciences Hubei University Wuhan China Tobacco Research Institute of Hubei Province Wuhan China

The synthetic microbial community is a synthetic microbial system co-cultured with multiple species, which has the characteristics of clear composition and strong controllability. Compared with a single colony, it can achieve more complex functions and adapt to the changing environment more easily, so as to meet a wide range of needs. In this paper, the contents and concepts of microbial community and synthetic microbial community are briefly introduced, the principles that should be followed in the construction of microbial community are expounded, the methods and mathematical models used in the construction of synthetic microbial community are introduced, and the applications of synthetic microbial community in various fields are summarized. Finally, the challenges in the research of synthetic microbial communities are briefly described.

关键词： Microorganism Synthetic Microbial Community Model Building

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航空网络结构鲁棒性分析

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华中科技大学学报（自然科学版） 2024年第1期52卷 106-111页

作者：赖强马鑫张宏昊池明华东交通大学电气与自动化工程学院江西南昌330013 华中科技大学人工智能与自动化学院湖北武汉430074

针对航空网络中大量的三元组结构,提出三元组相对量测度用以衡量航空网络结构鲁棒性.基于相对熵理论,提出更一般的网络结构变化测度指标,即度分布相对熵和集聚系数分布相对熵,来评价航空网络特征分布的变化.运用复杂网络理论构建国内航... 详细信息

针对航空网络中大量的三元组结构,提出三元组相对量测度用以衡量航空网络结构鲁棒性.基于相对熵理论,提出更一般的网络结构变化测度指标,即度分布相对熵和集聚系数分布相对熵,来评价航空网络特征分布的变化.运用复杂网络理论构建国内航空网络模型,采用多种攻击策略对国内航空网络的结构鲁棒性进行仿真实验.结果表明:国内航空网络在各测度与攻击方式中表现出不同的结构鲁棒性,三元组相对量不仅反映了网络结构,而且呈现了网络功能变化;最小三元组边在维持网络运输功能上也表现出重要意义.

关键词：航空网络相对熵三元组测度指标结构鲁棒性

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近断层地震动对上承式拱桥动力响应的影响

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世界地震工程 2022年第3期38卷 117-126页

作者：龚浩张洪豪徐略勤张令重庆交通大学土木工程学院重庆400074 中国公路工程咨询集团有限公司北京100089 重庆交通大学省部共建山区桥梁及隧道工程国家重点实验室重庆400074

为了揭示近断层地震作用下上承式钢筋混凝土拱桥的动力响应特点,以西南山区某上承式拱桥为背景,用OpenSEES平台建立了全桥非线性动力分析模型,探讨了近断层地震动的输入方式、脉冲效应和竖向地震动等三个关键因素对桥梁动力响应的影响... 详细信息

为了揭示近断层地震作用下上承式钢筋混凝土拱桥的动力响应特点,以西南山区某上承式拱桥为背景,用OpenSEES平台建立了全桥非线性动力分析模型,探讨了近断层地震动的输入方式、脉冲效应和竖向地震动等三个关键因素对桥梁动力响应的影响规律。研究结果表明:地震输入方式对拱圈地震响应的影响较小,但对拱上立柱地震响应的影响很大,尤其是拱顶附近的短立柱,在抗震分析中,建议偏安全地采用三向地震输入方式;脉冲效应对拱桥地震响应的影响非常大,会导致拱圈、拱上立柱和桥面板地震响应大幅增加,桥面板残余平面转角甚至增大6倍以上;竖向地震动对拱圈轴力和面内弯矩、拱上立柱纵向弯矩和剪力的影响很大,拱顶处的面内弯矩放大倍数最大可达2.95,总体来说,采用规范所建议的方法考虑竖向地震是偏保守的。

关键词：上承式拱桥近断层地震脉冲效应竖向地震动输入方式

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