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Advances in Graphene‑Based Electrode for Triboelectric Nanogenerator

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Nano-Micro Letters 2025年第1期17卷 378-403页

作者： Bin Xie Yuanhui Guo yun Chen Hao Zhang Jiawei Xiao Maoxiang Hou Huilong Liu Li Ma Xin Chen Chingping Wong State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment Guangdong University of TechnologyGuangzhou 510006People’s Republic of China School of Electromechanical Engineering Guangdong University of TechnologyGuangzhou 510006People’s Republic of China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332USA

With the continuous development of wearable electronics,wireless sensor networks and other micro-electronic devices,there is an increasingly urgent need for miniature,flexible and efficient nanopower generation *** nanogenerator(TENG)technology can convert small mechanical energy into electricity,which is expected to address this *** the core component of TENG,the choice of electrode materials significantly affects its *** metal electrode materials often suffer from problems such as durability,which limits the further application of ***,as a novel electrode material,shows excellent prospects for application in TENG owing to its unique structure and excellent electrical *** review systematically summarizes the recent research progress and application prospects of TENGs based on graphene *** precision processing methods of graphene electrodes are introduced,and the applications of graphene electrode-based TENGs in various scenarios as well as the enhancement of graphene electrodes for TENG performance are *** addition,the future development of graphene electrode-based TENGs is also prospectively discussed,aiming to promote the continuous advancement of graphene electrode-based TENGs.

关键词： Triboelectric nanogenerator Precision processing Graphene electrode Self-powered sensor

Rebuilding the theory of isotope fractionation for evaporation of silicate melts under vacuum condition

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Acta Geochimica 2024年第4期43卷 661-676页

作者： Jie wang yun Liu Research Center for Planetary Science College of Earth and Planetary SciencesChengdu University of TechnologyChengdu 610059China State Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China CAS Center for Excellence in Comparative Planetology Hefei 230026China

Isotope eff ects are pivotal in understanding silicate melt evaporation and planetary accretion *** on the Hertz-Knudsen equation,the current theory often fails to predict observed isotope fractionations of laboratory experiments due to its oversimplified ***,we point out that the Hertz-Knudsen-equation-based theory is incomplete for silicate melt evaporation cases and can only be used for situations where the vaporized species is identical to the one in the *** propose a new model designed for silicate melt evaporation under *** model considers multiple steps including mass transfer,chemical reaction,and *** derivations reveal a kinetic isotopic fractionation factor(KIFF orα)αour model=[m(^(1)species)/m(^(2)species)]^(0.5),where m(species)is the mass of the reactant of reaction/nucleation-limiting step or species of diffusion-limiting step and superscript 1 and 2 represent light and heavy isotopes,*** model can eff ectively reproduce most reported KIFFs of laboratory experiments for various elements,i.e.,Mg,Si,K,Rb,Fe,Ca,and ***,the KIFF-mixing model referring that an overall rate of evaporation can be determined by two steps jointly can account for the eff ects of low P_(H2)pressure,composition,and *** addition,we find that chemical reactions,diffusion,and nucleation can control the overall rate of evaporation of silicate melts by using the fitting slope in ln(−ln f)versus ln(t).Notably,our model allows for the theoretical calculations of parameters like activation energy(E_(a)),providing a novel approach to studying compositional and environmental eff ects on evaporation processes,and shedding light on the formation and evolution of the proto-solar and Earth-Moon systems.

关键词： Evaporation Kinetic isotopic fractionation Chemical kinetics Hertz-Knudsen equation CAIS

IRES-mediated cap-independent translation,a path leading to hidden proteome

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Journal of Molecular Cell Biology 2019年第10期11卷 911-919页

作者： yun Yang Zefeng wang CAS Key Laboratory of Computational Biology Biomedical Big Data CenterCAS-MPG Partner Institute for Computational BiologyShanghai Institute of Nutrition and HealthChinese Academy of SciencesShanghai 200031China University of Chinese Academy of Sciences Chinese Academy of SciencesShanghai 200031China CAS Center for Excellence in Molecular Cell Science Chinese Academy of SciencesShanghai 200031China

Most eukaryotic mRNAs are translated in a cap-dependent fashion;however,under stress conditions,the cap-independent translation driven by internal ribosomal entry sites(IRESs)can serve as an alternative mechanism for protein *** IRESs have been discovered from viral or cellular mRNAs to promote ribosome assembly and initiate translation by recruiting different trons-acting *** the mechanisms of translation initiation driven by viral IRESs are relatively well understood,the existence of cellular IRESs is still under debate due to the limitations of translation reporter systems used to assay IRES activities.A recent screen identified>1000 putative IRESs from viral and human mRNAs,expanding the scope and mechanism for capindependent ***,a large number of circular RNAs lacking free ends were identified in eukaryotic cells,many of which are found to be translated through *** findings suggest that IRESs may play a previously unappreciated role in driving translation of the new type of mRNA,implying a hidden proteome produced from cap-independent translation.

关键词： IRES ITAF translation bicistronic system circular RNA

Effects of thermodynamics parameters on mass transfer of volatile pollutants at air-water interface

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Water Science and Engineering 2015年第3期8卷 211-216页

作者： Li-ping Chen Kai-yun Xuan Bin Zhou Guang-fa Deng College of Urban Construction Nanjing University of Technology Jiangsu Frontier Electric Technology Co. Ltd.

A transient three-dimensional coupling model based on the compressible volume of fluid （VOF） method was developed to simulate the transport of volatile pollutants at the air-water interface. VOF is a numerical technique for locating and tracking the free surface of water flow. The relationships between Henry＇s constant, thermodynamics parameters, and the enlarged topological index were proposed for nonstandard conditions. A series of experiments and numerical simulations were performed to study the transport of benzene and carbinol. The simulation results agreed with the experimental results. Temperature had no effect on mass transfer of pollutants with low transfer free energy and high Henry＇s constant. The temporal and spatial distribution of pollutants with high transfer free energy and low Henry＇s constant was affected by temperature. The total enthalpy and total transfer free energy increased significantly with temperature, with significant fluctuations at low temperatures. The total enthalpy and total transfer free energy increased steadily without fluctuation at high temperatures.

关键词： Henry's constant Mass transfer at interface Thermodynamics parameters Topological index Volatile pollutants

The continuous wavelet derived by smoothing function and its application in cosmology

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Communications in Theoretical Physics 2021年第9期73卷 95-104页

作者： yun wang Ping He College of Physics Jilin UniversityChangchun 130012China Center for High Energy Physics Peking UniversityBeijing 100871China

The wavelet analysis technique is a powerful tool and is widely used in broad disciplines of engineering,technology,and *** this work,we present a novel scheme of constructing continuous wavelet functions,in which the wavelet functions are obtained by taking the first derivative of smoothing functions with respect to the scale *** to this wavelet constructing scheme,the inverse transforms are only one-dimensional integrations with respect to the scale parameter,and hence the continuous wavelet transforms(CWTs)constructed in this way are more ready to use than the usual *** then apply the Gaussian-derived wavelet constructed by our scheme to computations of the density power spectrum for dark matter,the velocity power spectrum and the kinetic energy spectrum for baryonic *** computations exhibit the convenience and strength of the *** transforms are very easy to perform,and we believe that the simplicity of our wavelet scheme will make CWTs very useful in practice.

关键词： wavelet analysis intergalactic medium large-scale structure of Universe

Tier-1 assays for assessing the toxicity of insecticidal proteins produced by genetically engineered plants to non-target arthropods

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Insect Science 2014年第2期21卷 125-134页

作者： yun-He Li Jorg Romeis Kong-Ming Wu Yu-fa Peng State Key Laboratory for Plant Diseases and Insect Pests Institute of Plant Protection Chinese Academy of Agricultural Sciences Beijing China Agroscope Reckenholz-Tanikon Research Station ART Zurich Switzerland

In assessing an insect-resistant genetically engineered （IRGE） crop before its commercialization, researchers normally use so-called ＂Tier-1 assays＂ as the initial step to determine the effects of the crop on non-target organisms. In these tests, the insecticidal proteins （IPs） produced by the IRGEs are added to the diets of test organisms in the laboratory. Test organisms in such assays can be directly exposed to much higher concentrations of the test IPs than they would encounter in the field. The results of Tier-1 assays are thus more conservative than those generated in studies in which the organisms are exposed to the IPs by feeding on IRGE plant tissue or in the case of predators or parasites, by feeding on invertebrate prey or hosts that have fed on IRGE plant tissue. In this report, we consider three important factors that must be considered in Tier-1 assays：（i） methods for delivery of the IP to the test organisms; （ii） the need for and selection of compounds used as positive controls; and （iii） methods for monitoring the concentration, stability and bioactivity of the IP during the assay. We also analyze the existing data from Tier-1 assays regarding the toxicity of Bt Cry proteins to non-target arthropod species. The data indicate that the widely used Bt proteins have no direct toxicity to non-target organisms

关键词： artificial diet Cry protein environmental risk assessment ELISA positivecontroll sensitive insect bioassay

Synthesis of N-Succinyl-chitosan(Suc-Chi) and Preparation of Oxymatrine(OM)/N-Succinyl-chitosannanoparticles

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Chemical Research in Chinese Universities 2006年第5期22卷 589-592页

作者： YAN Cheng-yun CHEN Da-wei GU Ji-wei LI Liu-fa School of Pharmacy Shenyang Pharmaceutical University Shenyang 110016 P. R. China College of Chemistry ＆ Pharmacy Jiamusi University Jiamusi 154000 P. R. China

Oxymatrine （OM）/N-succinyl-chitosan （Suc-Chi, with a degree of substitution being 0. 32） was synthesized via the ring-opening reaction of succinic anhydride with chitosan in dimethyl sulfoxide. OM-loaded Suc-Chi nanoparticles were prepared by an ionotropic gelation process and OM was quantified via the HPLC method： The influences of the initial OM concentration on the nanoparticle characteristics and OM release behavior were evaluated. The nanoparticles were found to have a mean diameter within a range of 267-392 nm, a positive surface charge, and a zeta potential in the range of 19-27 inV. The formulation with an initial OM concentration of 100μg/mL provided the highest loaded capacity（0. 77% ） and the highest extent of the released OM （68% at 24 h）, suggesting the possibility to achieve a therapeutic dose. According to the data obtained, this Suc-Chi-based nanotechnology will open up new and interesting prospects for the development of new anticancer drugs.

关键词： N-Succinyl-chitosan Synthesis Oxymatrine Nanoparticles Characterization

Electroacupuncture-induced neuroprotection against focal cerebral ischemia in the rat is mediated by adenosine A1 receptors

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Neural Regeneration Research 2017年第2期12卷 228-234页

作者： Qin-xue Dai Wu-jun Geng Xiu-xiu Zhuang Hong-fa wang yun-chang Mo He Xin Jiang-fan Chen Jun-lu wang Department of Anesthesiology First Affiliated Hospital of Wenzhou Medical University Department of Neurology Boston University School of Medicine

The activation of adenosine A1 receptors is important for protecting against ischemic brain injury and pretreatment with electroacupuncture has been shown to mitigate ischemic brain insult. The aim of this study was to test whether the adenosine A1 receptor mediates electroacupuncture pretreatment-induced neuroprotection against ischemic brain injury. We first performed 30 minutes of electroacupuncture pretreatment at the Baihui acupoint（GV20）, delivered with a current of 1 mA, a frequency of 2/15 Hz, and a depth of 1 mm. High-performance liquid chromatography found that adenosine triphosphate and adenosine levels peaked in the cerebral cortex at 15 minutes and 120 minutes after electroacupuncture pretreatment, respectively. We further examined the effect of 15 or 120 minutes electroacupuncture treatment on ischemic brain injury in a rat middle cerebral artery-occlusion model. We found that at 24 hours reperfusion,120 minutes after electroacupuncture pretreatment, but not for 15 minutes, significantly reduced behavioral deficits and infarct volumes. Last, we demonstrated that the protective effect gained by 120 minutes after electroacupuncture treatment before ischemic injury was abolished by pretreatment with the A1-receptor antagonist 8-cyclopentyl-1,3-dipropylxanthine（1 mg/kg, intraperitoneally）. Our results suggest that pretreatment with electroacupuncture at the Baihui acupoint elicits protection against transient cerebral ischemia via action at adenosine A1 receptors.

关键词： nerve regeneration adenosine adenosine triphosphate adenosine A1 receptor cerebral ischemia electroacupuncture pretreatment 8-cyclopentyl-1 3-dipropylxanthine high-performance liquid chromatography neural regeneration

Two-qubit pure state tomography by five product orthonormal bases

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Chinese Physics B 2018年第10期27卷 190-195页

作者： Yu wang yun Shang Institute of Mathematics Academy of Mathematics and Systems Sciences Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China National Center for Mathematics and Interdisciplinary Sciences Chinese Academy of Sciences Beijing 100190 China MDIS Academy of Mathematics and Systems Sciences Chinese Academy of Sciences Beijing 100190 China

In this paper, we focus on two-qubit pure state tomography. For an arbitrary unknown two-qubit pure state, separable or entangled, it has been found that the measurement probabilities of 16 projections onto the tensor products of Pauli eigenstates are enough to uniquely determine the state. Moreover, these corresponding product states are arranged into five orthonormal bases. We design five quantum circuits, which are decomposed into the common gates in universal quantum computation, to simulate the five projective measurements onto these bases. At the end of each circuit, we measure each qubit with the projective measurement {｜0〉〈0 ｜,｜1〉,〈1｜ }. Then, we consider the open problem whether three orthonormal bases are enough to distinguish all two-qubit pure states. A necessary condition is given. Suppose that there are three orthonormal bases {B1,B2,B3}. Denote the unitary transition matrices from B1 to {B2,B3 } as U1 and U2. All 32 elements of matrices U1 and U2 should not be zero. If not, these three bases cannot distinguish all two-qubit pure states.

关键词： two-qubit pure state tomography projective measurement quantum circuit