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A novel metal-ceramic composite combining the structures of nacre and nanofiber reinforced foam

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Journal of Materials Science & Technology 2023年第26期157卷 189-199页

作者： Guodong Shi Zhanjun Wu hengli Wang State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of TechnologyDalian 116024China Key Laboratory of Advanced Technology for Aerospace Vehicles Liaoning ProvinceDalian University of TechnologyDalian 116024China

Lightweight high-strength and tough composites have enormous potentials in a multitude of fields in-cluding biomaterials,sporting goods,aerospace and automobile ***,we present a strat-egy to develop a novel bulk Al/SiC composite with a nacre/foam hybrid structure to combine excellent lightweight of foams with outstanding strength and toughness of *** reduce the adverse effect of foam pores on mechanical properties,we further propose to strengthen the foams with 3D nanofiber networks,obtaining a nacre/nanofiber reinforced foam ***,new particle-bubble co-assembly and selective infiltration technologies are proposed to prepare the novel nacre/foam and nacre/nanofiber reinforced foam *** nacre/nanofiber reinforced foam composite shows greater specific strength and toughness than the nacre/foam composite,conventional dense Al/SiC composites and many engineering *** approach opens a promising new avenue for the structure design and manufacturing of lightweight,high-performance structural materials.

关键词： Nanofiber reinforced foams Nacre-mimetic Microstructure Mechanical properties Freeze-casting Metal-ceramic composites

Furfural Reduction via Hydrogen Transfer from Supercritical Methanol

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Chemical Research in Chinese Universities 2019年第3期35卷 498-503页

作者： MA Fei LI hengli JIANG Jiuxing Fine Chemical Industry Research Institute School of ChemistrySun Yat-sen University Guangzhou 510275P.R.China Huizhou Research Institute Sun Yat-sen UniversityHuizhou 516081P.R.China State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical and Technology Beijing 100029P.R.China

Furfural derived from biomass hemicelluloses is an important intermediate for biofuels and chemicals. In order to further upgrade, furfural is usually reduced into 2-methyl furan that is more stable and useful. In this work, furfural was reduced by CuZnAl, CuMgAl, Cu2Cr2O5, CuNiAl as catalysts in a supercritical methanol without external H2 source. The best yield of 2-methyl furan was achieved among the H2 free furfural process reported as high as 74%. And the catalytic behaviors were discussed under difierent catalysts and temperatures conditions.

关键词： Furfural 2-Methyl furan Supercritical methanol

虫螨腈与Bt混配对小菜蛾的田间防效及虫螨腈在西兰花上的残留消解动态

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农药学学报 2021年第5期23卷 922-929页

作者：王翠翠陈安琪董文阳杨恒力王文卓朱斌史雪岩梁沛刘丰茂束长龙张杰中国农业大学植物保护学院北京100193 中国农业大学理学院应用化学系农药创新中心北京100193 中国农业科学院植物保护研究所植物病虫害生物学国家重点实验室北京100193

研究明确虫螨腈与苏云金芽孢杆菌(Bacillus thuringiensis,Bt)混配使用对小菜蛾的田间防效和虫螨腈在西兰花上的残留消解动态,可以为在西兰花害虫防治中减少虫螨腈的用量提供依据。采用手动喷雾法进行了虫螨腈防治小菜蛾的田间药效试验... 详细信息

研究明确虫螨腈与苏云金芽孢杆菌(Bacillus thuringiensis,Bt)混配使用对小菜蛾的田间防效和虫螨腈在西兰花上的残留消解动态,可以为在西兰花害虫防治中减少虫螨腈的用量提供依据。采用手动喷雾法进行了虫螨腈防治小菜蛾的田间药效试验,采用高效液相色谱-串联质谱法(HPLC-MS/MS)测定了西兰花上虫螨腈的残留消解动态。结果显示,10%虫螨腈悬浮剂与32000 IU/mg Bt可湿性粉剂分别按50%推荐剂量混配施用,施药后1、3和7 d对小菜蛾的防效分别为58.11%、65.21%和58.80%,与推荐剂量虫螨腈单剂的防效没有显著差异,但均显著超过了50%推荐剂量虫螨腈单剂及50%推荐剂量Bt单剂的防效,施药后3 d也显著超过了推荐剂量Bt单剂的防效。此外,10%虫螨腈悬浮剂与32000 IU/mg Bt可湿性粉剂分别按50%推荐剂量混配施用后,虫螨腈在西兰花上的残留消解动态,与施用50%推荐剂量虫螨腈单剂后的残留消解动态接近,但虫螨腈在西兰花中的残留量均显著低于施用推荐剂量虫螨腈单剂的残留量。10%虫螨腈悬浮剂与32000 IU/mg Bt可湿性粉剂分别按50%推荐剂量混配施用后,虫螨腈在西兰花上的残留消解动态符合准一级反应动力学或一级反应动力学方程,消解半衰期为4.2 d,施药后7 d的残留量为0.072 mg/kg,低于虫螨腈在西兰花的最大残留限量(MRL)0.50 mg/kg(参考澳大利亚的MRL标准),施药后14 d低于定量限(0.050 mg/kg)。研究结果表明,10%虫螨腈悬浮剂与32000 IU/mg Bt可湿性粉剂分别按50%推荐剂量混配使用,可以达到减药防治小菜蛾的同时降低虫螨腈在西兰花上残留的目的。

关键词：虫螨腈苏云金芽孢杆菌混配小菜蛾防治效果西兰花残留消解动态

液-固相法合成LiMn_(0.6)Fe_(0.4)PO_(4)的性能

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电池 2024年第2期54卷 205-208页

作者：李亨利徐荣益王昭沛李意能曲靖市德方纳米科技有限公司云南曲靖655000 佛山市德方纳米科技有限公司广东佛山528500

磷酸锰锂(LiMnPO_(4))材料的电导率低且充放电过程易发生Jahn-Teller效应,导致电化学性能不理想。通过液-固相法合成磷酸锰铁锂(LiMn_(0.6)Fe_(0.4)PO_(4))正极材料,并对晶体结构、放电曲线特性、循环性能等进行分析。Fe均匀地掺入Mn位... 详细信息

磷酸锰锂(LiMnPO_(4))材料的电导率低且充放电过程易发生Jahn-Teller效应,导致电化学性能不理想。通过液-固相法合成磷酸锰铁锂(LiMn_(0.6)Fe_(0.4)PO_(4))正极材料,并对晶体结构、放电曲线特性、循环性能等进行分析。Fe均匀地掺入Mn位形成固溶体,样品的常温电化学性能得到改善。在2.0~4.3 V循环,0.1 C倍率下的放电比容量为156.5 mAh/g;以1.0 C倍率循环2000次,容量保持率超过80%。容量衰减主要源于循环过程中正极材料颗粒产生裂纹及颗粒粉化。

关键词：锂离子电池正极材料磷酸锰铁锂(LiMn_(0.6)Fe_(0.4)PO_(4)) 容量衰减掺杂液-固相法固溶体

Laser diode partially end-pumped electro-optically Q-switched Yb:YAG slab laser

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Chinese Optics Letters 2019年第11期17卷 58-60页

作者： Qian Gao hengli Zhang Javed Fayyaz School of Optics and Photonics Beijing Institute of TechnologyBeijing 100081China

A laser diode partially end-pumped, electro-optically Q-switched, Yb:Y3Al5O12(Yb:YAG) slab laser was reported. We obtained output energy of 14.6 mJ/pulse with a pulse width of 30 ns at a repetition frequency of 2 k Hz, and the corresponding peak power was 480 kW. The beam quality factors M2 in the unstable direction and the stable direction was 1.32 and 1.25, respectively.

关键词： Yb:YAG pumped switched

Pre-reduction of WO 3 – Co 3 O 4 by H 2 – C 2 H 4 in a fl uidized bed

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Lipocalin-2-Mediated Insufficient Oligodendrocyte Progenitor Cell Remyelination for White Matter Injury After Subarachnoid Hemorrhage via SCL22A17 Receptor/Early Growth Response Protein 1 Signaling

中国化学工程学报（英文版） 2024年第2期 273页

作者： Huijun Shang hengli Li Weijun Li Feng Pan Zhan Du

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Neuroscience Bulletin 2022年第12期38卷 1457-1475页

作者： Qiang Li Xufang Ru yang yang hengli Zhao Jie Qu Weixiang Chen Pengyu Pan Huaizhen Ruan Chaojun Li Yujie Chen Hua Feng Department of Neurosurgery and State Key Laboratory of Trauma Burn and Combined InjurySouthwest HospitalThird Military Medical University(Army Medical University)Chongqing 400038China Department of Neurobiology College of Basic Medical SciencesThird Military Medical University(Army Medical University)Chongqing 400038China Model Animal Research Center Nanjing UniversityNanjing 210032China Chongqing Key Laboratory of Precision Neuromedicine and Neuroregenaration Southwest HospitalThird Military Medical University(Army Medical University)Chongqing 400038China Chongqing Clinical Research Center for Neurosurgery Southwest HospitalThird Military Medical University(Army Medical University)Chongqing 400038China

Insufficient remyelination due to impaired oligodendrocyte precursor cell(OPC)differentiation and maturation is strongly associated with irreversible white matter injury(WMI)and neurological *** analyzed whole transcriptome expression to elucidate the potential role and underlying mechanism of action of lipocalin-2(LCN2)in OPC differentiation and WMI and identified the receptor SCL22A17 and downstream transcription factor early growth response protein 1(EGR1)as the key signals contributing to LCN2-mediated insufficient OPC *** LCN-knockdown and OPC EGR1 conditional-knockout mice,we discovered enhanced OPC differentiation in developing and injured white matter(WM);consistent with this,the specific inactivation of LCN2/SCl22A17/EGR1 signaling promoted remyelination and neurological recovery in both atypical,acute WMI due to subarachnoid hemorrhage and typical,chronic WMI due to multiple *** potentially represents a novel strategy to enhance differentiation and remyelination in patients with white matter injury.

关键词： White matter injury Oligodendrocyte progenitor cell Remyelination Subarachnoid hemorrhage Multiple sclerosis Lipocalin-2 Early growth response protein 1

鄂尔多斯盆地神木气田太原组低品质气藏储层微观特征及形成机理

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石油实验地质 2024年第1期46卷 32-45页

作者：张涛巩肖可黄朝曹青赟孟凤鸣董占民陈朝兵王恒力中国石油天然气股份有限公司长庆油田分公司第二采气厂西安710200 西安石油大学地球科学与工程学院西安710065 陕西省油气成藏地质学重点实验室西安710065 延安大学石油工程与环境工程学院陕西延安716000

鄂尔多斯盆地神木气田与周边气田开发效果差异较大,表现出低品质气藏特征,给气田勘探部署及持续稳产带来一定困扰。为了揭示低品质气藏成因,基于不同尺度微观实验手段,对神木气田太原组储层开展了微观特征及形成机理研究。结果表明,神... 详细信息

鄂尔多斯盆地神木气田与周边气田开发效果差异较大,表现出低品质气藏特征,给气田勘探部署及持续稳产带来一定困扰。为了揭示低品质气藏成因,基于不同尺度微观实验手段,对神木气田太原组储层开展了微观特征及形成机理研究。结果表明,神木气田太原组储层具有“富石英、贫长石、岩屑含量较高”的特征,发育小孔—细喉型孔喉组合,孔喉连通性较差,储渗能力较弱,为低孔—超低渗致密砂岩储层;太原组低品质储层的形成受杂基、喷发岩岩屑含量及成岩作用的共同影响。储层在形成过程中,受晚石炭世—早二叠世鄂尔多斯盆地北部内蒙古古隆起火山活动的影响明显,砂岩内喷发岩岩屑和杂基含量普遍较高,喷发岩岩屑为次生孔隙的发育提供了主要物质基础,杂基在堵塞孔隙的同时也产生了一定数量杂基溶孔,对储层的影响具有双重性。成岩过程中的溶蚀作用对于太原组储层的形成至关重要,增孔效应占现今孔隙度的64.3%。晚白垩世末期,燕山运动末幕导致鄂尔多斯盆地构造反转,气水重新调整,盆地东部天然气沿断裂部分逸散,最终形成了现今神木气田太原组的低品质气藏。神木气田下一步勘探重点应在摸清成岩作用宏观展布规律及有利岩性圈闭的基础上,寻找高含量喷发岩岩屑和低含量杂基的发育区。

关键词：成岩作用孔喉结构凝灰质杂基构造反转太原组神木气田鄂尔多斯盆地

Zika virus and neural developmental defects: building a case for a cause

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Science China(Life Sciences) 2016年第5期59卷 536-538页

作者： Sarah C Ogden Christy Hammack hengli Tang Department of Biological Science Florida State University

Zika virus （ZIKV）, a little-known .flavivirus until a few months ago, is currently at the forefront of public health concerns worldwide because of its suspected role in causing microcephaly and other developmental defects in fetuses of infected mothers. On February 1, 2016, the World Health Organization declared a Public Health Emergency of Inter- national Concern （PHEIC） for ZIKV. Discovered more than half a century ago in Uganda,

关键词：神经发育病毒缺陷事业世界卫生组织健康问题公共卫生乌干达