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Biodegradation of Microcystin-RR by a New Isolated Sphingopyxis sp. USTB-05

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Chinese Journal of Chemical Engineering 2010年第1期18卷 108-112页

作者：王俊峰吴鹏飞陈建闫海 Department of Biological Science and Technology School of Applied science University of Science and Tech-nology Beijing Beijing 100083 China Department of Environmental Engineering School of Resource and Environmental Engineering Jiangxi Univer-sity of Science and Technology Ganzhou 341000 China

A promising bacterial strain for the biodegradation of Microcystins(MCs)was isolated from Dianchi lake in China and identified as Sphingopyxis ***-05 by the analysis of 16s *** MC-RR of 42.3 mg·L -1 was completely degraded by USTB-05 within 36 h,which was a relatively high biodegradation rate of *** the cell-free extract(CE)of Sphingopyxis ***-05,MC-RR was biodegraded at a more rapid biodegradation rate compared with its strain,so that initial MC-RR of 42.3 mg·L -1 was completely biodegraded within 10 *** the bio-reaction of MC-RR catalyzed by CE,two intermediate metabolites and a dead-end product of MC-RR were observed on HPLC profiles and all of them had similar scanning profiles in the wavelength from 200 to 300 nm,indicating that the group of Adda in all products of MC-RR remained intact.

关键词： microcystin-RR Sphingopyxis sp.USTB-05 cell-free extract biodegradation

广义变系数BKP方程的自Bcklund变换和精确解析解(英文)

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量子电子学报 2014年第6期31卷 663-669页

作者：孟祥花许瑞麟许晓革北京信息科技大学理学院

应用Painleve分析法研究了广义变系数Burgers-Kadomtsev-Petviashvili(BKP)方程。结果显示该方程不具有Painleve性质。通过截断Painleve展开方法,在条件f(t)=cg(t)(c为任意常数)下,得到了该方程的自Bcklund变换。基于自Bcklund变换... 详细信息

关键词：非线性方程广义变系数Burgers—Kadomtsev—Petviashvili方程 Painleve分析自Bgcklund变换解析解

Emerson＇s Views on Reform

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Journal of Literature and Art Studies 2014年第4期4卷 240-249页

作者： LONG Yun MENG Qing-fang beijing International Studies University Beijing China

As the most influential representative of New England Transcendentalism, Ralph Waldo Emerson has been commonly known as a man of letters and a prophet of religion. Yet, at the same time, he was also questioned by some scholars who argued that Emerson remained aloof and indifferent to both politics and reforms. Scrutinizing the addresses, essays as well as other published writings of Emerson, we can have a better understanding of his deep thought and wisdom concerning reform, and fully realize his great influence. Based on analyzing two essential aspects of Emerson＇s views on reform, this paper points out that Emerson＇s views on reform are of historical importance; and his views can also provide realistic reference and guidance to the current social reform in China.

关键词： reform optimism human-oriented morality

Optimal Recovery of Functions on the Sphere on a Sobolev Spaces with a Gaussian Measure in the Average Case Setting

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Analysis in Theory and Applications 2015年第2期31卷 154-166页

作者： Zexia Huang Heping Wang School of Mathematical Sciences Capital Normal University School of Science Xihua University

In this paper, we study optimal recovery （reconstruction） of functions on the sphere in the average case setting. We obtain the asymptotic orders of average sampling numbers of a Sobolev space on the sphere with a Gaussian measure in the Lq （S^d-1） metric for 1 ≤ q ≤ ∞, and show that some worst-case asymptotically optimal algorithms are also asymptotically optimal in the average case setting in the Lq （S^d-1） metric for 1 ≤ q ≤ ∞.

关键词： Optimal recovery on the sphere average sampling numbers optimal algorithm,Gaussian measure.

外源性二氧化硫对大鼠脂多糖性急性肺损伤的改善作用

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生理学报 2009年第5期61卷 499-503页

作者：黄新莉周君琳周晓红羡晓辉丁春华河北医科大学病理生理教研室石家庄050017 首都医科大学附属北京朝阳医院骨科北京100020

为探讨外源性二氧化硫(sulfur dioxide,SO2)对脂多糖(lipopolysaccharide,LPS)所致大鼠肺损伤时肺组织炎性反应的影响,采用经尾静脉注射LPS的方法复制大鼠肺损伤模型,将雄性Sprague-Dawley(SD)大鼠随机分为4组:对照组、LPS组、LPS+SO2组... 详细信息

为探讨外源性二氧化硫(sulfur dioxide,SO2)对脂多糖(lipopolysaccharide,LPS)所致大鼠肺损伤时肺组织炎性反应的影响,采用经尾静脉注射LPS的方法复制大鼠肺损伤模型,将雄性Sprague-Dawley(SD)大鼠随机分为4组:对照组、LPS组、LPS+SO2组[注射LPS前10min静脉给予外源性SO2供体亚硫酸钠/亚硫酸氢钠(Na2SO3/NaHSO3)0.5mL]和SO2组(单纯给予Na2SO3/NaHSO3)。给药后6h处死大鼠,测定肺系数;光镜下观察肺组织形态学改变;测定支气管肺泡灌洗液(bronchoalveolar lavage fluid,BALF)中的中性粒细胞(polymorphonuclear neutrophil,PMN)数量;采用流式细胞术检测肺组织中细胞间黏附因子-1(ICAM-1)的表达情况;应用酶联免疫法(ELISA)检测血清中IL-1、IL-6和IL-10含量。所得结果如下:与对照组比较,静脉注射LPS可引起肺组织明显的形态学改变;肺系数、肺损伤的组织学定量评价指标(IQA)和BALF中PMN数量增加;肺组织中ICAM-1表达增多,血清中IL-1、IL-6和IL-10水平升高。预先给予Na2SO3/NaHSO3可显著减轻LPS所致肺损伤的程度,同时使肺系数、肺IQA和BALF中PMN数量减少;肺组织中ICAM-1表达下降,血清中IL-1、IL-6水平下降而IL-10水平升高。SO2组大鼠上述各项指标与对照组大鼠相比无显著差异。以上结果提示,外源性SO2可抑制LPS所致大鼠肺损伤时肺组织中的炎症反应。

关键词：内毒素肺损伤二氧化硫大鼠

Super high maximum on-state currents in 2D transistors

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Journal of Semiconductors 2022年第12期43卷 9-11页

作者： Xiaotian Sun Qiuhui Li Ruge Quhe Yangyang Wang Jing Lu College of Chemistry and Chemical Engineering and Henan Key Laboratory of Function-Oriented Porous MaterialsLuoyang Normal UniversityLuoyang 471934China State Key Laboratory of Information Photonics and Optical Communications and School of Science Beijing University of Posts and TelecommunicationsBeijing 100876China State Key Laboratory for Mesoscopic Physics and School of Physics Peking UniversityBeijing 100871China Qian Xuesen Laboratory of Space Technology China Academy of Space TechnologyBeijing 100094China Collaborative Innovation Center of Quantum Matter Beijing 100871China beijing Key Laboratory for Magnetoelectric Materials and Devices(BKL-MEMD) Peking UniversityBeijing 100871China Peking University Yangtze Delta Institute of Optoelectronics Nantong 226010China Key Laboratory for the Physics and Chemistry of Nanodevices Peking UniversityBeijing 100871China

Two-dimensional(2D)materials have been recognized as a type of potential channel material to replace silicon in future field-effect transistors(FETs)by the International Technology Roadmap for Semiconductors(ITRS)and its succesor the International Roadmap for Devices and Systems(IRDS)[1−4].Substantial first principle quantum transport simulations have predicted that many 2D transistors,including those with MoS2,WSe2,phosphorene,and Bi2O2Se channels,own excellent device performance and are able to extend Moore’s law down to the sub-10 nm scale[4].

关键词： transistors replace state

155 Mb/s-10 Gb/s combined FSK-IM/optical label-packet modulation signals 100 km transmission over standard single mode fiber using mid-span spectral inversion by four-wave mixing in an SOA

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Chinese Physics B 2009年第8期18卷 3449-3452页

作者：忻向军马建新张琦邓超公王葵如余重秀刘博 Key Laboratory of Information Photonics and Optical Communications (beijing University of Posts and Telecommunications) Ministry of Education Zhangjiakou Vacational and Technical College

This paper introduces the mid-span spectral inversion by four-wave mixing in a commercially available semiconductor optical amplifier （SOA） with a length of about 1.5 mm to optical label switching network based on combined frequency shift keying （FSK）-intensiy modulation （IM）/optical label-packet modulation to overcome the dispersion limitation of fiber. The 155 Mb/s-10 Gb/s combined FSK/IM signal is experimentally transmitted over a 100 km standard single mode fiber. 10^-10 and 10^-9 BER （bit error ratio）, or even better, is achieved for the FSK label and IM packet, respectively. The -19 dB power conversion efficiency is obtained for -1 nm wavelength detuning.

关键词： optical label switching mid-span spectral inversion semiconductor optical amplifier

中性粒细胞在外源性硫化氢抗内毒素致急性肺损伤中的作用

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生理学报 2009年第4期61卷 356-360页

作者：黄新莉周晓红周君琳丁春华羡晓辉河北医科大学病理生理教研室石家庄050017 首都医科大学附属北京朝阳医院骨科北京100020

本文应用尾静脉注射脂多糖(lipopolysaccharide,LPS)致Sprague-Dawley大鼠急性肺损伤(acute lung injury,ALI)模型和体外培养人血多形核中性粒细胞(polymorphonuclear neutrophil,PMN),观察硫化氢(hydrogen sulfide,H2S)供体硫氢化钠(sodium hydrosulfide,NaHS)对LPS所致肺内PMN聚集、微血管通透性及PMN凋亡的影响。整体实验和体外实验分别设对照组、NaHS组、LPS组和LPS+NaHS组,检测肺微血管通透性、肺内PMN聚集以及PMN凋亡情况。结果显示:(1)整体实验中,LPS组大鼠的支气管肺泡灌洗液(bronchoalveloar lavage fluid,BALF)中蛋白含量、PMN数量、肺组织中伊文思蓝(Evans blue)含量均明显高于假手术组(均P<0.05),而LPS+NaHS组上述指标均明显低于LPS组(P<0.05,P<0.01);(2)体外培养人血PMN,LPS组和NaHS组的PMN凋亡百分率明显高于对照组(P<0.01),LPS+NaHS组明显高于LPS组(P<0.01)。以上结果提示,NaHS能够减少PMN在肺内的聚集,在一定程度上起到抗LPS所致的以肺微血管高通透性为特征的ALI的作用,促进PMN凋亡可能是NaHS减轻PMN在肺内聚集的机制之一。

关键词：硫化氢内毒素肺损伤中性粒细胞

Ultrafast Laser Filamentation in Transparent Solids

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Ultrafast Science 2023年第5期3卷 9-24页

作者： Tianyang Yan Lingfei Ji Pen-Tung Sah Institute of Micro-Nano Science and Technology Xiamen UniversityXiamen 361005China institute of Laser Engineering Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China Key Laboratory of Trans-scale Laser Manufacturing Technology.Ministryof Education Beijing100124China

Ultrafast laser filamentation results from the interaction of ultrafast laser with Kerr *** filamentary propagation,the transparent medium is altered by numerous linear and nonlinear effects of ultrashort laser *** can cause material modification in solids through laser energy deposition and ionization processes,which creates a new opportunity for ultrafast laser processing of materials when combined with filamentary propagation characteristics,such as intensity champing and long propagation *** paper reviews the research on ultrafast laser filamentation in solids for micro-and nano-processing,including the fundamental physics,filamentation characteristics,and applications in solids for ultrafast laser filamentation-induced *** highlighted are the difficulties and potential applications for solid-based filamentation-induced processing.

关键词： ultrashort solids propagation