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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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Pancreatic stent improves the success rate of needle-knife papillotomy in patients with difficult biliary cannulation

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World Journal of Gastroenterology 2025年第1期31卷 58-67页

作者： Mu-Hsien Lee Cheng-Hui lin Chi-Huan Wu Yung-Kuan Tsou Kai-Feng Sung sheng-Fu Wang Nai-Jen Liu Department of Gastroenterology and Hepatology Chang Gung Memorial Hospital and Chang Gung University College of MedicineTaoyuan 33305Taiwan School of Medicine Chang Gung UniversityTaoyuan 33305Taiwan

BACKGROUND Needle-knife precut papillotomy(NKP)is typically performed ***,it remains unclear whether pancreatic stent(PS)placement can improve the outcomes of *** To explore whether PS placement improves the success rate of NKP in patients with difficult biliary *** This single-center retrospective study included 190 patients who underwent NKP between January 2017 and December 2021 after failed conventional biliary *** cases with incidental pancreatic duct cannulation during conventional biliary cannulation,the decision for pre-NKP PS placement was made at the endoscopist's *** primary outcome was the difference in the NKP success rate between patients with and without PS placement;the secondary outcome was the adverse event *** Among the 190 participants,82 received pre-NKP PS(PS-NKP group)whereas 108 did not[freehand or freehand NKP(FH-NKP)group].Post-NKP selective biliary cannulation was successful in 167(87.9%)patients,and the PS-NKP had a significantly higher success rate than the FH-NKP group(93.9%vs 83.3%,P=0.027).The overall adverse event rates were 7.3%and 11.1%in the PS-NKP and FH-NKP groups,respectively(P=0.493).A periampullary diverticulum(PAD)and significant intraoperative bleeding during NKP were independently associated with NKP failure;however,a pre-NKP PS was the only predictor of NKP *** the 44 participants with PADs,the PS-NKP group had a non-significantly higher NKP success rate than the FH-NKP group(87.5%and 65%,respectively;P=0.076).CONCLUSION PS significantly improved the success rate of NKP in patients with difficult biliary cannulation.

关键词： Difficult biliary cannulation Endoscopic retrograde cholangiopancreatography Needle-knife papillotomy Pancreatic stent Selective biliary cannulation

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垂直发射低空超低空防空导弹杀伤区近界研究

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现代防御技术 2004年第5期32卷 21-24页

作者：陈久生李向林中国航天科工集团公司二院二部北京100854

以低空超低空防空导弹为研究对象,分析了影响其杀伤区近界的主要因素,并针对其采取垂直冷发射的特殊发射方式,应用快速姿态调转的方法,保证了导弹由姿态调转段到制导段的动态误差小。提出了有效的控制方式,进行了大量的典型弹道的数学仿... 详细信息

以低空超低空防空导弹为研究对象,分析了影响其杀伤区近界的主要因素,并针对其采取垂直冷发射的特殊发射方式,应用快速姿态调转的方法,保证了导弹由姿态调转段到制导段的动态误差小。提出了有效的控制方式,进行了大量的典型弹道的数学仿真,从结果来看,这种设计可以将低空超低空防空导弹的杀伤区近界压至接近最小。

关键词：低空超低空防空导弹垂直冷发射侧向直接推力控制快速控制

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Hierarchical porous carbon derived from animal bone as matric to encapsulated selenium for high performance Li-Se battery

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Rare Metals 2017年第5期36卷 434-441页

作者： Li-sheng Xie sheng-Xue Yu Hui-Jun Yang Jun Yang Jian-Lan Ni jiu-lin Wang Shanghai Electrochemical Energy Devices Research Center Department of Chemical EngineeringShanghai Jiao Tong UniversityShanghai 200240China College of Environment and Chemistry Engineering Yanshan UniversityQinhuangdao 066004China Shanghai Using Yuan Environmental Engineering Co. LtdShanghai 201801China

Animal bone was employed as raw material to prepare hierarchical porous carbon by KOH activation. Rare metal selenium（Se） was encapsulated into hierarchical porous carbon successfully for the cathode material of Li–Se battery, achieving the transformation of waste into energy,protecting environment and reducing the spread of the disease. Animal bone porous carbon（ABPC） acquires a specific surface area of 1244.7903 m^2·g^-1 and a pore volume of 0.594184 cm^3·g^-1. The composite Se/ABPC with 51 wt%Se was tested as a novel cathode for Li–Se batteries. The results show that Se/ABPC exhibits high specific capacity,good cycling stability and current-rate performance; at 0.1C,the composite Se/ABPC delivers a high reversible capacity of 705 mAh·g^-1 in the second cycle and 591 mAh·g^-1 after 98 cycles. Even at the current density of 2.0C, it can still maintain at a reversible capacity of 485 mAh·g^-1. The excellent electrochemical properties benefit from the high electron conductivity and the carbon with unique hierarchical porous structure. ABPC can be a promising carbon matrix for Li–Se batteries.

关键词： Se/ABPC Animal bones High rate capability Li–Se battery Hierarchical porous structure

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Adjustable polarization-independent wide-incident-angle broadband far-infrared absorber

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Chinese Physics B 2020年第7期29卷 141-146页

作者： jiu-sheng Li Xu-sheng Chen Centre for THz Research China Jiliang UniversityHangzhou 310018China

To promote the application of far-infrared technology,functional far-infrared devices with high performance are ***,we propose a design scheme to develop a wide-incident-angle far-infrared absorber,which consists of a periodically semicircle-patterned graphene sheet,a lossless inter-dielectric spacer and a gold reflecting *** normal incidence for both TE-and TM-polarization modes,the bandwidth of 90%absorption of the proposed far-infrared absorber is ranging from 6.76 THz to 11.05 *** absorption remains more than 90%over a 4.29-THz broadband range when the incident angle is up to 50◦for both TE-and TM-polarization *** peak absorbance of the absorber can be flexibly tuned from 10%to 100%by changing the chemical potential from 0 eV to 0.6 *** tunable broadband far-infrared absorber has promising applications in sensing,detection,and stealth objects.

关键词： far-infrared absorber semicircle-patterned graphene wide incident angle

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Nonlinear Density Enhancement of ^(3)He in the Sun's Central Core

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Chinese Physics Letters 2000年第3期17卷 233-234页

作者： DU jiu-lin Department of Physics Shaanxi Normal UniversityXi'an 710062 Depeirtment of Physics Xidian UniversityXi'an 710071

A flow velocity Geld that has a"sink" drives the core ^(3)He nuclear reaction diffusion system to instability to jump from the origimd state to the new one,in which the total amout of ^(3)He is *** alters the original competition between pp Ⅰ and pp Ⅱ+pp Ⅲ chains,and thus potentially suppresses the production of both the ^(7)Be and ^(8)B neutrino fluxes.

关键词： chains Nonlinear diffusion

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Switchable vortex beam polarization state terahertz multi-layer metasurface

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Chinese Physics B 2022年第11期31卷 309-315页

作者： Min Zhong jiu-sheng Li Center for THz Research China Jiliang UniversityHangzhou 310018China

We propose a switchable vortex beam polarization state terahertz multi-layer metasurface,which consists of threelayer elliptical metal crosses,four-layer dielectrics,and two-layer hollow metal circles,which are alternately *** the normal incidence of left-handed circularly polarized(LCP)wave and the right-handed circularly polarized(RCP)waves,the proposed structure realizes three independent control functions,i.e.,focused and vortex beam,vortex beam with different topological charges,and polarization states switching,and azimuth switching of two vortex beams with different polarization *** results show that the proposed metasurface provides a new idea for investigating the multifunctional terahertz wave modulation devices.

关键词： terahertz wave switchable vortex beam polarization states flexible manipulation

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Multi-function terahertz wave manipulation utilizing Fourier convolution operation metasurface

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Chinese Physics B 2022年第5期31卷 350-354页

作者： Min Zhong jiu-sheng Li Centerfor THz Research China Jiliang UniversityHangzhou 310018China

We propose a novel metasurface based on a combined pattern of outer C-shaped ring and inner rectangular *** Fourier convolution operation to generating different predesigned sequences of metasurfaces,we realize various functionalities to flexible manipulate terahertz waves including vortex terahertz beam splitting,anomalous vortex terahertz wave deflection,vortex terahertz wave splitting and deflection *** incident terahertz wave can be flexibly controlled in a single *** designed metasurface has an extensive application prospect in the field of future terahertz communication and sensing.

关键词： Fourier convolution operation metasurface terahertz wave flexible manipulation

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Polarization conversion metasurface in terahertz region

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Chinese Physics B 2020年第7期29卷 159-163页

作者： Chen Zhou jiu-sheng Li Centre for THz Research China Jiliang UniversityHangzhou 310018China China Key Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang Province College of Information EngineeringChina Jiliang UniversityHangzhou 310018China

Polarization conversion is a very important electromagnetic wave manipulation *** this paper,we investigate a high-efficiency linear-to-circular polarization and cross-polarization converter by utilizing coding *** coding particle consists of top layer metal pattern and bottom metal plate sandwiched with square F4B dielectric,which can manipulate the linear-to-circular polarization and cross-polarization converter of the reflected wave *** the terahertz frequency range of 1.0 THz-2.0 THz,the reflection magnitudes reach approximately 90%and the axial ratio is less than 3 *** proposed polarization converter may lead to advances in a variety of applications such as security,microscopy,information processing,stealth technology,and data storage.

关键词： terahertz wave polarization conversion metasurface

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Content delivery network and its regulation

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The Journal of China Universities of Posts and Telecommunications 2006年第4期13卷 98-101页

作者： PENG jiu-sheng LIANG Xiong-jian School of Economics and Management Beijing University of Posts and Telecommunications Beijing 100876 China

First, this article provides an introduction to the content delivery network （CDN）, which has wide prospects but is still in its early stages in China. Second, this article depicts the present situation and the developing characteristics of CDN in China. Elaborating on the above-mentioned two points, this article identifies the numerous problems that are encountered during the development of CDN, such as indistinct service positioning and the hidden troubles of information security. Finally, this article presents several countermeasures for handling the problems, such as opening the market widely, making a rational service positioning, strengthening the regulation on information security, and punishing illegal operations and unfair competition.

关键词： CDN Intemet information security

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