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Calcium-Mediated Mitochondrial Permeability Transition Involved in Hydrogen Peroxide-Induced Apoptosis in Tobacco Protoplasts

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Journal of Integrative Plant Biology 2006年第4期48卷 433-439页

作者： yuan Wang Jiu-Sheng Lin Gen-xuan Wang Key Laboratory of Arid Agroecology at Lanzhou University Ministry of Education Lanzhou 730000 China Department of Biochemisty and Plant Science Initiative George W. Beadle Center University of Nebraska-Lincoln Lincoln NE 68588 USA College of Life Sciences Zhejiang University Hangzhou 310027 China

In the present study, we focused on whether Intracellular free Ca^2＋（[Ca^2＋],） regulates the formation of mltochondrlal permeability transition pore （MPTP） In H2O2-induced apoptosis In tobacco protoplasts. It was shown that the decrease In mltochondrlal membrane potential （△ψm） preceded the appearance of H2O2-Induced apoptosls; pretreatment with the specific MPTP Inhibitor cyclosporine A, which also Inhibits Ca^2＋ cycling by the mitochondria, effectively retarded apoptosls and the decrease In △ψm. Apoptosls and decreased △ψm were exacerbated by CaCl2, whereas the plasma membrane voltage-dependent Ca^2＋ channel blocker lanthanum chloride （LaCl3） attentuated these responses. Chelation of extracellular Ca^2＋ with EGTA almost totally Inhibited apoptosls and the decrease In △ψmInduced by H2O2. The time-course of changes In [Ca^2＋]l In apoptosls was detected using the Ca^2＋ probe Fiuo-3 AM. These studies showed that [Ca^2＋]1 was Increased at the very early stage of H2O2-Induced apoptosls. The EGTA evidently Inhibited the Increase In [Ca^2＋]1 Induced by H=O=, whereas It was only partially Inhibited by LaCl3. The results suggest that H2O2 may elevate cytoplasmic free Ca^2＋ concentrations In tobacco protoplasts, which mainly results from the entry of extracellular Ca^2＋, to regulate mltochondrlal permeability transition. The signaling pathway of [Ca^2＋]1-medlated mltochondrlal permeability transition was associated with H2O2-Induced apoptosis In tobacco protoplaete.

关键词： apoptosis calcium hydrogen peroxide mitochondrial permeability transition pore programmed cell death tobacco protoplast.

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Synthesis of Macroscopic Zr(C6H5PO3)2 Tubes

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Journal of Materials Science & Technology 2007年第5期23卷 717-720页

作者： yuan yuan Jianjun yi Chenglin MA Qinghong XU State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing 100029 China Petrochemical Research Institute PetroChina Company Ltd Beijing 100083 China

A new method of infiltration-diffusion is used to synthesize macroscopic α-Zr（C6H5PO3）2 （α-ZrBP） tube. Compared to the routine method, no HF was used and a fiberlike product with several millimeters in length was obtained. SEM （scanning electronic microscopy） result indicates that these fibers are tubes. The wall of the tubes is composed of the flake of α-ZrBP overlapped with each other. As we know, it is the first report on the synthesis of millimeter-scale supramolecular assembly of α-ZrBP.

关键词： α-ZrBP Infiltratlon-diffusion Tube Supramolecular self-assembly

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A thermoelectric generator and water-cooling assisted high conversion efficiency polycrystalline silicon photovoltaic system

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Frontiers in Energy 2021年第2期15卷 358-366页

作者： Zekun LIU Shuang yuan yi yuan Guojian LI Qiang WANG Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education) Northeastern UniversityShenyang 110819China State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China Key Laboratory of Electromagnetic Processing of Materials of the Ministry of Education Northeastern UniversityShenyang 110819China

Solar energy has been increasing its share in the global energy structure. However, the thermal radiation brought by sunlight will attenuate the efficiency of solar cells. To reduce the temperature of the photovoltaic (PV) cell and improve the utilization efficiency of solar energy, a hybrid system composed of the PV cell, a thermoelectric generator (TEG), and a water-cooled plate (WCP) was manufactured. The WCP cannot only cool the PV cell, but also effectively generate additional electric energy with the TEG using the waste heat of the PV cell. The changes in the efficiency and power density of the hybrid system were obtained by real time monitoring. The thermal and electrical tests were performed at different irradiations and the same experiment temperature of 22°C. At a light intensity of 1000 W/m2, the steady-state temperature of the PV cell decreases from 86.8°C to 54.1°C, and the overall efficiency increases from 15.6% to 21.1%. At a light intensity of 800 W/m2, the steady-state temperature of the PV cell decreases from 70°C to 45.8°C, and the overall efficiency increases from 9.28% to 12.59%. At a light intensity of 400 W/m2, the steady-state temperature of the PV cell decreases from 38.5°C to 31.5°C, and the overall efficiency is approximately 3.8%, basically remain unchanged.

关键词： photovoltaic(PV) thermoelectric generator conversion efficiency hybrid energy systems water-cooled plate(WCP)

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Preparation of a cationic azobenzene dye-montmorillonite intercalation compound and its photochemical behavior

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Journal of University of Science and Technology Beijing 2006年第3期13卷 281-286页

作者： Tao Wan yi yuan Wenqiong He College of Materials and Chemistry ＆ Chemical Engineering Chengdu University of Technology Chengdu 610059 China

Montmorillonite/cationic azobenzene dye （GTL） intercalation compounds were prepared by the conventional ion exchange method. As compared with that of pure GTL, the thermal stability of the intercalated GTL was greatly enhanced, and the absorption band corresponding to azobenzene group in intercalated GTL shifted towards a longer wavelength by 55 nm, which could be ascribed to the strong conjugation of GTL supramolecular order structure （J cluster） confined in a nanoscale space of montmorillonite interlayer gallery. The microstructures of the resulting intercalation compounds could be successfully controlled by varying the amount of dye loaded as evidenced by the basal spacing of the intercalation compounds. The intercalated azo dye in the montmorillonite interlayer space exhibited reversible trans-to-cis photoisomerization and thermal cis-to-trans reaction. FTIR proved the successful intercalation of GTL into the silicate layer.

关键词： Na-montmorillonite azobenzene intercalation photoisomerization

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Seismic design analysis of the country masonry school buildings in the meizoseismal area

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Earthquake Engineering and Engineering Vibration 2011年第3期10卷 359-367页

作者： Feng yuan yi Dan Bi Qiong China Southwest Architecture Design ＆ Research Institute Chengdu 610042 China

Several reinforcing schemes are illustrated that are based on the loading characteristics of typical country masonry school buildings with sparsely spaced transversal walls and large depth. From the seismic damage observed following the Wenchuan Earthquake, the effects of reinforcing schemes, tie-columns and tie-beams on the seismic resistance of masonry buildings are analyzed. The concept of improving the ductility of these types of buildings is presented. Finally, some suggestions are proposed for the design of masonry buildings with sparsely spaced transversal walls and large depth.

关键词： masonry school buildings tie-columns tie-beams ductility wall between the windows Wenchuan earthquake seismic damage

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Adsorption desulfurization and weak competitive behavior from 1-hexene over cesium-exchanged Y zeolites(CsY)

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Journal of Energy Chemistry 2018年第1期27卷 271-277页

作者： Xiaojuan Liu Dezhi yi yuanyuan Cui Li Shi xuan Meng Research Center of Petroleum Processing East China University of Science and Technology

The systematic research about the adsorption desulfurization and competitive behavior from 1-hexene over cesium-exchanged Y zeolites has been investigated. The structural properties of the adsorbents were characterized by X-ray diffraction（XRD）, N_2 sorption（BET） and thermal analysis（TGA）. The effects of calcination temperature, calcination atmosphere, and adsorption temperature were studied by the dynamic and static tests. The competitive adsorption mechanisms between thiophene and 1-hexene were studied by in-situ Fourier transform infrared spectroscopy（in-situ FTIR） and temperature-programmed desorption（TPD）. CsY adsorbents exhibited high selectivity for thiophene even when a large amount of olefins ***-situ FTIR spectra of thiophene and 1-hexene adsorption indicated that both thiophene and 1-hexene were mainly adsorbed on CsY via π-complexation. The higher desorption activated energy and higher adsorption heat of thiophene than 1-hexene obtained by thiophene-TPD and hexene-TPD has revealed that thiophene is adsorbed more strongly in CsY adsorbents than 1-hexene.

关键词： 1-hexeneCsY Adsorption desulfurization Thiophene Mechanism

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Height Variation in the Summer Quasi-Zero Wind Layer over Dunhuang, Northwest China: A Diagnostic Study

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Journal of Meteorological Research 2022年第4期36卷 618-630页

作者： yi yuan yi LIU Lingkun RAN Hua ZHANG School of Environmental Studies China University of GeosciencesWuhan 430074 Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029 State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesChina Meteorological AdministrationBeijing 100081

This study investigates the variation in the stratospheric quasi-zero wind layer(QZWL)over Dunhuang,Gansu Province,China,on 9 August 2020 using sounding observations from the Dunhuang national reference station and the fifth generation of ECMWF atmospheric reanalysis data(ERA5).The QZWL over Dunhuang was located between 18.6 and 20.4 km on 9 August *** South Asian high(SAH)and subtropical westerly jet jointly affected the *** the SAH retreated westward,the upper-level westerly jet over Dunhuang strengthened,and the jet axis height *** a result,the zonal westerly wind was lifted to a higher altitude,and the wind speed of 100–70 hPa increased,raising the *** addition,the east–west oscillation of the SAH occurred earlier than the adjustment of the QZWL altitude,which can be used as a forecasting indicator for the *** further explore the mechanism responsible for the QZWL adjustment,the forcing terms in the equations for zonal wind,kinetic energy,and vertical wind shear were *** results showed that the upper-level geopotential gradient was the basic physical factor forcing the local change in zonal wind and kinetic *** change in zonal wind and kinetic energy led to the uplift of the *** results revealed that the vertical shear of horizontal wind could adequately indicate the stratospheric QZWL location.

关键词： stratospheric quasi-zero wind layer stratospheric airships South Asian high

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A possible probe to neutron-skin thickness by fragment parallel momentum distribution in projectile fragmentation reactions

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Nuclear Science and Techniques 2024年第6期35卷 114-119页

作者： Chun-Wang Ma yi-Jie Duan Ya-Fei Guo Chun-yuan Qiao Yu-Ting Wang Jie Pu Kai-xuan Cheng Hui-Ling Wei College of Physics Henan Normal UniversityXinxiang 453007China Institute of Nuclear Science and Technology Henan Academy of SciencesZhengzhou 450015China

Neutron-skin thickness is a key parameter for a neutron-rich nucleus;however,it is difficult to *** the framework of the Lanzhou Quantum Molecular Dynamics(LQMD)model,a possible probe for the neutron-skin thickness(δ_(np))of neutron-rich ^(48)Ca was studied in the 140A MeV ^(48)Ca+^(9)Be projectile fragmentation reaction based on the parallel momentum distribution(p∥)of the residual fragments.A Fermi-type density distribution was employed to initiate the neutron density distributions in the LQMD simulations.A combined Gaussian function with different width parameters for the left side(Γ_(L))and the right side(Γ_(R))in the distribution was used to describe the p∥of the residual *** neutron-rich sulfur isotopes as examples,Γ_(L) shows a sensitive correlation withδ_(np) of ^(48)Ca,and is proposed as a probe for determining the neutron skin thickness of the projectile nucleus.

关键词： Neutron-skin thickness Projectile fragmentation Parallel momentum distribution Neutron-rich nucleus Quantum molecular dynamics model

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Deep profile soil moisture distribution characteristics for different microtopographies on the semi-arid Loess Plateau, China

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Journal of Mountain Science 2021年第10期18卷 2688-2697页

作者： GOU Qing-ping ZHU Qing-ke LI yi-xuan TIAN Xiang-lei WANG Peng-xiang XIN Yun-ling LUO Shu-yuan School of Soil and Water conservation Beijing Forestry UniversityBeijing 100083China Engineering Research Center of Forestry Ecological Engineering Ministry of EducationBeijing Forestry UniversityBeijing 100083China

Soil moisture is a limiting factor for vegetation restoration on the Loess Plateau, China. Micro-topography may cause heterogeneities in the distribution of soil moisture, but little is known about its effect on deep soil moisture. Our study aims to explore the distribution and impact of soil moisture within the upper 10 m of soil for different microtopographies. Taking undisturbed slope as the control, five micro-topographies were selected. Soil moisture over a depth of 0-10 m from 2017 to 2019 was investigated, and soil particle size and soil organic matter were measured. Variance analysis and multiple comparisons were used to analyze the difference in soil moisture for different microtopographies and multiple-linear regression was used to analyze the influence of micro-topography on soil moisture. There are significant differences in soil moisture within the different layers underlying the examined micro-topographies, while the inter-annual variation in soil water storage for the selected microtopographies increase with increased rainfall. The depth of influence of micro-topographic vegetation on soil moisture exceeded 1000 cm for a gully(GU), 740 cm for a sink hole(SH), 480 cm for a scarp(SC), 360 cm for an ephemeral gully(EG) and 220 cm for a platform(PL). Micro-topography will cause the heterogeneous distribution of soil moisture in the shallower layers, which changes the vegetation distribution differences between micro-topographies. This may be the survival strategy of herbaceous vegetation in response to climate change in the Loess Plateau. For future vegetation restoration efforts, we need to pay attention to the influence of microtopography on soil moisture.

关键词： Deep soil moisture Erosion degradation Micro-topography Semiarid loess region

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Zinc-based fiber-shaped rechargeable batteries:Insights into structures,electrodes,and electrolytes

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Nano Research 2025年第1期18卷 278-293页

作者： xuan Zhang Hongcheng Zhang Mengxiang Chen Jingqi Lu Evgeny Zhuravlev Jing Jiang Pin Liu Shengyang Dong Du yuan Guoyin Zhu Lianbo Ma yizhou Zhang Institute of Advanced Materials and Flexible Electronics(IAMFE) School of Chemistry and Materials ScienceNanjing University of Information Science and TechnologyNanjing 210044China School of Materials Science and Engineering Anhui University of TechnologyMaanshan 243002China College of Materials Science and Engineering Changsha University of Science and TechnologyChangsha 410004China

The rapid evolution of flexible wearable electronics has spurred a growing demand for energy storage devices,characterized by low-cost manufacturing processes,high safety standards,exceptional electrochemical performance and robust mechanical *** novel flexible devices,fiber-shaped batteries(FSBs)have emerged as prominent solutions exceptionally suited to future applications,owing to their unique one-dimensional(1D)architecture,remarkable flexibility,potential for miniaturization,adaptability to deformation and compatibility with the conventional textile *** the forefront research on fiber-shaped batteries,zincbased FSBs(ZFSBs)have garnered significant attentions,featured by the promising electrochemical properties of metallic *** enthusiasm is driven by the impressive capacity of Zn(820 mAh·g^(-1))and its low redox potential(Zn/Zn^(2+):-0.76 V *** hydrogen electrode).This review aims to consolidate recent achievements in the structural design,fabrication processes and electrode materials of flexible ***,we highlight three representative structural configurations:parallel type,twisted type and coaxial *** also place special emphasis on electrode modifications and electrolyte ***,we delve into the promising development opportunities and anticipate future challenges associated with ZFSBs,emphasizing their potential roles in powering the next generation of wearable electronics.

关键词： zinc-based batteries fiber-shape parallel type twisted type coaxial type

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