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碳纳米管改性涂层复合材料的制备设计及性能研究

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中国胶粘剂 2023年第9期32卷 16-20,26页

作者：马艾丽何晓红郭莹陈佳雨祁滔叶一鸣文振兴北京理工大学珠海学院广东珠海519088

为了解决碳纳米管容易团聚且在聚合物基体中分散性差等问题,利用偶联剂将碳纳米管进行功能化处理,使得碳纳米管均匀地分散在水性环氧树脂中并形成一种理想的两相界面,充分发挥碳纳米管的优异性能,制备出一种性能优异的复合防腐涂层,并... 详细信息

为了解决碳纳米管容易团聚且在聚合物基体中分散性差等问题,利用偶联剂将碳纳米管进行功能化处理,使得碳纳米管均匀地分散在水性环氧树脂中并形成一种理想的两相界面,充分发挥碳纳米管的优异性能,制备出一种性能优异的复合防腐涂层,并深入探究了其复合材料的力学特性、疏水性等。研究结果表明:通过傅里叶变换红外光谱和X射线衍射光谱仪分析,证实碳纳米管表面和偶联剂发生了化学反应,成功接枝;改性前当碳纳米管添加浓度达到5%时,开始发生明显团聚,而改性后分散效果明显提升,添加浓度在9%时才开始出现团聚;改性后碳纳米管对复合材料的附着力明显提升,优于未改性碳纳米管复合材料,但添加量不宜过大;改性对复合材料涂层的硬度没有削弱,复合材料涂层依然保持良好的力学性能。总之,改性碳纳米管添加到复合涂层中可以有效改善其综合性能,但添加量不宜超过9%。

关键词：碳纳米管防腐复合材料

ICP-OES测定电镀废水中铜、锌、铅、铬、镉、镍

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广东化工 2016年第16期43卷 186-186,176页

作者：周丽马艾丽李大伟广东省珠海市金湾区环境监测站广东珠海519080 北京理工大学珠海学院化工与材料学院广东珠海519085

电镀废水中含有铬、铜、镍等多种重金属离子等剧毒物质,对其快速准确监测非常重要,文章建立了ICP-OES同时测定电镀废水中Cu、Zn、Pb、Ni、Cr、Cd等金属元素的方法,对电镀水样进行分析并与原子吸收光谱法结果对比。

关键词： ICP—OES 电镀废水重金属离子

High-throughput screening of novel TFEB agonists in protecting against acetaminopheninduced liver injury in mice

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Acta Pharmaceutica Sinica B 2024年第1期14卷 190-206页

作者： Xiaojuan Chao Mengwei Niu Shaogui Wang Xiaowen ma Xiao Yang Hua Sun Xujia Hu Hua Wang Li Zhang Ruili Huang Menghang Xia Andrea Ballabio Hartmut Jaeschke Hong-Min Ni Wen-Xing Ding Department of Pharmacology Toxicology and TherapeuticsUniversity of Kansas Medical CenterKansas CityKS 66160USA NMPA Key Laboratory for Research and Evaluation of Drug Metabolism&Guangdong Provincial Key Laboratory of New Drug Screening School of Pharmaceutical SciencesSouthern Medical UniversityGuangzhou 510515China Department of Oncology the First Affiliated Hospital of Anhui Medical UniversityAnhui Medical UniversityHefei 230032China National Center for Advancing Translational Sciences National Institutes of HealthBethesdaMD 20892USA Telethon Institute of Genetics and Medicine TIGEMPozzuoliNaples 80131Italy Medical Genetics Department of Translational MedicineFederico II UniversityNaples 80131Italy Department of Molecular and Human Genetics Baylor College of MedicineHoustonTX 77030USA Department of Internal Medicine Division of GastroenterologyHepatology&MotilityUniversity of Kansas Medical CenterKansas CityKS 66160USA

macroautophagy(referred to as autophagy hereafter)is a major intracellular lysosomal degradation pathway that is responsible for the degradation of misfolded/damaged proteins and *** studies showed that autophagy protects against acetaminophen(APAP)-induced injury(aili)via selective removal of damaged mitochondria and APAP protein *** lysosome is a critical organelle sitting at the end stage of autophagy for autophagic degradation via fusion with *** the present study,we showed that transcription factor EB(TFEB),a master transcription factor for lysosomal biogenesis,was impaired by APAP resulting in decreased lysosomal biogenesis in mouse *** loss-of and gain-of function of hepatic TFEB exacerbated or protected against aili,***,overexpression of TFEB increased clearance of APAP protein adducts and mitochondria biogenesis as well as SQSTM1/p62-dependent non-canonical nuclear factor erythroid 2-related factor 2(NRF2)activation to protect against *** also performed an unbiased cell-based imaging high-throughput chemical screening on TFEB and identified a group of TFEB *** these agonists,salinomycin,an anticoccidial and antibacterial agent,activated TFEB and protected against aili in *** conclusion,genetic and pharmacological activating TFEB may be a promising approach for protecting against aili.

关键词： Autophagy DILI Drug screening Hepatotoxicity Lysosome Mitochondria Mitophagy NRF2

Carboxyl groups trigger the activity of carbon nanotube catalysts for the oxygen reduction reaction and agar conversion

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Nano Research 2015年第2期8卷 502-511页

作者： Yexin Zhang Chunlin Chen Lixia Peng Zhongsen ma Yajie Zhang Hengheng Xia aili Yang Lei Wang Dang Sheng Su Jian Zhang Ningbo Institute of materials Technology & Engineering Chinese Academy of Sciences Ningbo 315201 China Science and Technology on Surface Physics and Chemistry Laboratory Mianyang 621907 China Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

Ozone treatment is a common way to functionalize commercial multi-walled carbon nanotubes （CNTs） with various oxygen functionalities like carboxyl, phenol and lactone groups, in order to enhance their textural properties and chemical activity. In order to detail the effect of each functional group, we correlated the activity with the surface density of each group, and found that the carboxyl groups play a pivotal role in two important catalytic reactions, namely the electrochemical oxygen reduction reaction （ORR） and agar conversion to 5-hydroxymethylfurfural （HMF）. During the processes, the hydrophilic surface provides a strong affinity for reaction substrates while the improved porosity allows the efficient diffusion of reactants and products. Furthermore, the activity of functionalized CNTs for agar conversion remained almost unchanged during nine cycles of reaction. This work highlights a strategy for improving the activity of CNTs for electrochemical ORR and agar conversion reactions, as well a promising application of carboxyl-rich CNTs as a solid acid catalyst to produce high-purity HMF--an important chemical intermediate.

关键词： carbon nanotubes functionalization carboxyl group oxygen reduction reaction biomass conversion

Melatonin alleviates heat stress‑induced testicular damage in dairy goats by inhibiting the PI3K/AKT signaling pathway

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Stress Biology 2022年第1期2卷 120-135页

作者： Yundie Liu Hui Cai Xinrui Guo aili Aierken Jinlian Hua Baohua ma Sha Peng College of Veterinary Medicine Shaanxi Centre of Stem Cells Engineering&TechnologyNorthwest Agriculture and Forestry University of Science and TechnologyYangling 712100ShaanxiChina

Current measures mainly focus on how melatonin reduces physiological heat stress in animals,but its effects on reproductive damage to male dairy goats have been *** study aimed to determine the protective effect of melatonin on male reproduction during heat stress in dairy goats and to further explore its mechanisms.A natural heat stress model of Saanen dairy goats was used to assess testicular tissue damage 7days after heat stress and to examine semen quality changes during a spermatogenic ***-seq,Western blot,RT–qPCR,and immunofluo-rescence staining were used to explore the mechanism by which melatonin protects against heat stress-induced reproductive damage and to validate the *** data suggested that melatonin significantly alleviated the heat stress-induced decrease in sperm quality,protected varicose tubule structure,reduced the levels of heat shock proteins and apoptotic proteins and protected the spermatocytes and round spermatozoa,which are mainly affected by heat ***-seq results suggest that melatonin inhibits the PI3K/AKT signaling pathway,reduces the level of p-AKT,and promotes elevated *** addition,melatonin treatment could upregulate the gene expression of MT2 which was downregulated by heat stress and improve the change in extracellular matrix components and restore serum testosterone *** results suggest that melatonin can protect against testicular and spermatogenic cell damage and improve semen quality in male dairy goats under heat *** study provides an important reference for subsequent studies on the molecular mechanisms of melatonin in protecting male reproductive processes under heat stress and using exogenous melatonin to prevent heat stress.

关键词： Natural heat stress Melatonin PI3K/AKT signaling pathway Spermatocytes Apoptosis

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提高波前探测精度的高阶矩方法

红外与激光工程 2012年第2期41卷 472-477页

作者：夏爱利马彩文中国科学院西安光学精密机械研究所陕西西安710119 中国科学院研究生院北京100049

夏克-哈特曼波前传感器测量畸变波前的探测精度主要取决于光斑质心的测量精度。提出了一种提高光斑质心探测精度的新方法,在优化的探测窗口内使用高阶矩方法计算光斑的质心。首先,在整个子孔径内,通过一阶矩方法获得光斑的近似中心,然... 详细信息

夏克-哈特曼波前传感器测量畸变波前的探测精度主要取决于光斑质心的测量精度。提出了一种提高光斑质心探测精度的新方法,在优化的探测窗口内使用高阶矩方法计算光斑的质心。首先,在整个子孔径内,通过一阶矩方法获得光斑的近似中心,然后以这个近似中心为中心,包含整个光斑,建立一个矩形窗口,并在该窗口内通过高阶矩方法重新计算光斑的质心。通过该改进的方法,在优化的探测窗口外,噪声的影响基本被消除;在优化的探测窗口内,噪声的影响也因为光斑权值比重的增大而削弱。实验结果证明:与传统方法相比,新方法提高了光斑质心测量的精度、重复性和稳定性。

关键词：自适应光学夏克-哈特曼波前传感器质心计算高阶矩

Enhanced electrocatalytic activity of Co@N-doped carbon nanotubes by ultrasmall defect-rich TiO2 nanoparticles for hydrogen evolution reaction

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Nano Research 2017年第8期10卷 2599-2609页

作者： Jiayuan Yu Weijia Zhou Tanli Xiong aili Wang Shaowei Chen Benli Chu School of Environment and Energy Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control South China University of Technology Guangzhou Higher Education Mega Center Guangzhou 510006 China School of Physics and Telecommunication Engineering South China Normal University Guangzhou Higher Education Mega Center Guangzhou 510006 China Department of Chemistry and Biochemistry University of California 1156 High Street Santa Cruz CA 95064 USA

Despite being technically possible, splitting water to generate hydrogen is practically unfeasible, mainly because of the lack of sustainable and efficient earth-abundant catalysts for the hydrogen-evolution reaction （HER）. Herein, we report a durable and highly active electrochemical HER catalyst based on defect-rich TiO2 nanoparticles loaded on Co nanoparticles@N-doped carbon nanotubes （D-TiOdCo@NCT） synthesized by electrostatic spinning and a subsequent calcining process. The ultrasmall TiO2 nanoparticles are 1.5-2 nm in size and have a defect-rich structure of oxygen vacancies. D-TiO2/Co@NCT exhibits excellent HER catalytic activity in an acidic electrolyte （0.5 M H2SO4）, with a low onset potential of -57.5 mV （1 ma·cm^-2）, a small Tafel slope of 73.5 mV·dec^-1, and extraordinary long-term durability. X-ray photoelectron spectroscopy, electron paramagnetic resonance spectroscopy, and theoretical calculations confirm that the Ti3. defect-rich structure can effectively regulate the catalytic activity for electrochemical water splitting.

关键词： ultrasmall nanoparticle TiO2 defect structure carbon nanotube hydrogen-evolution reaction

REE composition in scheelite and scheelite Sm-Nd dating for the Xuebaoding W-Sn-Be deposit in Sichuan

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Chinese Science Bulletin 2007年第18期52卷 2543-2550页

作者： LIU Yan DENG Jun LI ChaoFeng SHI GuangHai ZHENG aili State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Beijing 100083 China Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China

The scheelite with large size and euhedral shape from Xuebaoding, Sichuan Province is an ideal min- eral to study REE patterns and Sm-Nd dating of non-gold deposits. The scheelite has diameters of 1― 10 cm and colors of pale beige to deep orange. Most of these scheelites occur in association with beryl, cassiterite and muscovite. The rare earth elements indicate that scheelite samples from Xuebaoding W-Sn-Be deposits contain high concentrations of rare earth elements with total ΣREE+Y contents in the range of 369―1725 μg·g?1 and nearly all of these scheelite samples are enriched in LREE and depleted in HREE and have negative Eu anomalies. The REE patterns of the scheelites are similar to those of A-type granite with obvious tetrad effect, similar to that of type II scheelites. Based on reported fluid inclusion studies, the mineralizing-fluid of the Xuebaoding W-Sn-Be deposit indicates low Na activity. The REE patterns of the scheelite are probably controlled by partition coefficient in hydrothermal fluid. In the 147Sm/144Nd-143Nd/144Nd diagram, the scheelites show a linear array corresponding to an isochron age of 182.0±9.2 ma (MSWD = 0.52). The Sm-Nd age represents the formation age of the scheelite and can indicate that the W, Sn and Be mineralization at Xuebaoding took place in the Early Yanshanian. The Sm-Nd dating result is important for the study of the multi-metal resources in western Sichuan Province.

关键词：白钨矿钐-钕同位素测年四川钨-锡-铍沉积物

Facile lattice tensile strain compensation in mixed-cation halide perovskite solar cells

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Journal of Energy Chemistry 2022年第3期31卷 422-428,I0012页

作者： Shurong Wang Jie Hu aili Wang Yuying Cui Bin Chen Xiaobin Niu Feng Hao School of materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731SichuanChina

Despite the rapid development of power conversion efficiency(PCE)for halide perovskite solar cells(PSCs),the lattice strain engineering in perovskite thin films has been rarely probed in recent ***,a strain compensation by homogeneous crystallization in perovskite films is achieved with the aid of precursor aging in the mixed-cation perovskite of Cs_(0.05)(FA_(0.83)ma_(0.17))Pb(I_(0.90)Br_(0.10))_(3)with near 20%PCE in inverted *** homogeneous crystallization releases the residual tensile stress and induces more compressive stress at the edges of perovskite films,thus elongating the carrier lifetime and reducing the trap-assisted carrier *** high dependence on the perovskite components in strain engineering strategy was systematically revealed,wherein maPbI_(3)and Cs_(0.05)(FA_(0.83)ma_(0.17))PbI_(3)film showed an increased compressive strain and FAPbI3 film showed adverse tensile strain after *** density functional theory(DFT)calculations are further performed to reveal the change of electronic *** precursor aging-induced strain modulation was correlated with a systematic characterization of the charge carrier transport and recombination dynamics in the mixed-cation perovskite *** believe that this facile approach provides a novel strain engineering strategy for PSCs technology.

关键词： Lattice strain Charge transfer Br-ions Ideal factor Hybrid perovskite components