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Electrospun YMn2O5 nanofibers:A highly catalytic activity for NO oxidation

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Electrospun YMn2O5 nanofibers:A highly catalytic activity fo...

Identification of kalidium species(Chenopodiaceae)by DNA barcoding

第二十三届二氧化硫、氮氧化物和颗粒物污染防治技术研讨会

作者： Tong Zhang Hui Li Zhi Yang Fengren Cao Liang Li Haijun Chen Hui Liu ka Xiong Jie wu Zhanglian Hong Weichao Wang Department of Electronics and Tianjin Key Laboratory of Photo-Electronic Thin Film Device and Techno College of Physics Optoelectronics and EnergyCenter for Energy Conversion Materials & Physics(CECMP Dongguan Innovative New Materials Co.Ltd Dongguan 523000China College of material Science and Engineering Shandong University of Science and echnologyQingdao 266 State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang Unive Department of Electronics and Tianjin Key Laboratory of Photo-Electronic Thin Film Device and Techno

Nanofiber catalysts are potentially promising to be equipped in the lean-burned vehicle exhaust emission system considering its facile synthesis,low-cost,long durability in contrast to the traditionally complicated powder based ***,via electrospinning method,we synthesized YMnO nanofibers with various nano-morphologies including nanowire stacked with particles,hollow tubes with and without inside *** morphologies of fibers remained even after hydrothermal aging at 800℃ for 10 hours with 10% HO stream,while powder-based mullite is sintered.X-ray photoelectron spectrum revealed Mn/Mn ratio 0.589 on the surface of YMnO catalyst,resulting in the formation of oxygen *** highest conversion of electrospun mullite fibers at 310℃is ～18% higher than powder-based YMO at 352℃ in the presence of 5% HO at WHSV= 240,000 ml g *** extracted activation energy from NO-to-NO conversion curves of YMO nanofiber（61.68 kJ/mol） is slightly lower than that of powder-based mullite（91.45 kJ/mol）,consistent with calculated 68.16 kJ/mol on the fiber YMO surface（121） with a rate-limiting step of the NO *** catalytic activity can be attributed to the unit occupy of the eg(d and d) orbitals of Mn-dimer atoms around fermi level based on the combination of the theoretical calculations and DRIFTS spectra ***,after the hash hydrothermal-aging,the highest NO oxidation conversion of powder-based mullite is less than 50%,while the fiber maintains a conversion of 62%.Moreover,the fresh YMO fiber maintained superior oxidation stability for 12 hours at its maximum conversion of 66%.This work provides the possibility for mullite oxide fibers to replace powder-based precious metal catalyst coating on monolith converter.

关键词： Electrospinning YMn2O5 nanofibers NO oxidation Low-temperature catalysis Density functional theory

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Research in Cold and Arid Regions 2017年第1期9卷 89-96页

作者： XiaoHui Liang YuXia wu State Key Laboratory of Grassland Agro-Ecosystem School of Life SciencesLanzhou UniversityLanzhouGansu 730000China

DNA barcoding is an increasingly prevalent molecular biological technology which uses a short and conserved DNA fragment to facilitate rapid and accurate species identification. kalidium species are distributed in saline soil habitat throughout Southeast Europe and Northwest Asia, and used mainly as forage grass in China. The discrimination of ka-lidium species was based only on morphology-based identification systems and limited to recognized species. Here, we tested four DNA candidate loci, one nuclear locus （ITS, internal transcribed spacer） and three plastid loci （rbcL9 matK and ycflb）, to select potential DNA barcodes for identifying different kalidium species. Results showed that the best DNA barcode was ITS locus, which displayed the highest species discrimination rate （100%）, followed by matK （33.3%）,ycflb （16.7%）, and rbcL （16.7%）. Meanwhile, four loci clearly identified the variant species, kalidium cuspidatum （Ung.-Stemb.） ***.A. J. Li,as a single species in kalidium.

关键词： DNA barcoding kalidium species identification

用模型和模拟方法设计氨氯地平的群体药动学研究方案

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药学学报 2012年第7期47卷 941-946页

作者：左笑丛袁洪张毕奎 Chee M.NG Jeff S.BARRETT 阳国平黄志军裴奇郭韧周亚男荆宁宁 di wu 中南大学湘雅三医院湖南长沙410013 美国费城儿童医院临床药物治疗系应用药动学/药效学研究室 PA19104

合理的采样设计是建立可靠群体药动学模型的重要基础。应用非线性混合效应模型的群体药动学研究,是一种有效利用稀疏血样数据估算群体药动学参数的方法。本研究根据D最优化设计和贝叶斯法设计采样方案。以已报道的氨氯地平群体药动学模... 详细信息

合理的采样设计是建立可靠群体药动学模型的重要基础。应用非线性混合效应模型的群体药动学研究,是一种有效利用稀疏血样数据估算群体药动学参数的方法。本研究根据D最优化设计和贝叶斯法设计采样方案。以已报道的氨氯地平群体药动学模型为基础,根据临床研究的目的、给药方案和随访时间等设计几套采样方案,采用WinPOPT软件计算优化采样方案,用蒙特卡罗法(Monte Carlo)对各优化的采样方案分别建立一套含400个患者的NONMEM数据文件,用NONMEM7.2软件模拟氨氯地平的浓度数据,然后估算其重要药动学参数(CL/F,V/F和ka),并计算其平均预测误差(MPE)和平均绝对预测误差(MAPE)。在6个采样方案中,以方案6和3对CL/F估算的准确度和精密度较优,MPE分别为0.1%和0.6%,MAPE均为0.7%。对V的估算,各采样方案间无明显差异。因此,选用氨氯地平拟合药动学参数的准确度和精密度较优,且采样点个数较少的方案3为最佳临床研究方案。本研究旨在为开展氨氯地平在肾功能损害合并高血压患者的群体药动学研究提供科学、有效的采样方法,为群体PK/PD研究提供一种优化设计临床研究方案的科学方法。

关键词：氨氯地平群体药动学模型和模拟方案设计

Magnetic properties and microstructure of Fe69.5-xNd7B21Nb2.5Gax（x=0-1）alloys

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Journal of Rare Earths 2019年第10期37卷 1072-1077页

作者： Yong Gu Zhong Li Zhongyuan wu Minxiang Pan Chenxu Wang Xueling Hou Hui Xu Institute of Materials Science Shanghai UniversityShanghai200072China Qianjiang College Hangzhou Normal UniversityHangzhou310036China

The Fe69.5-xNd7 B21Nb2.5Gax(x = 0-1)permanent magnets in the form of rods were prepared by annealing the bulk amorphous *** magnetic properties,phase evolution and microstructure of the alloys were investigated *** is found that the glass forming ability(GFA), microstructure and magnetic properties are sensitive to Ga content for Fe69.5-xNd7 B21Nb2.5Gax(x = 0-1)bulk *** annealed alloys are mainly composed of soft α-Fe,hard Nd2 Fe14B and nonmagnetic Nd1.1Fe4 B4 *** x = 0.3,the optimally annealed magnets exhibit magnetic properties of the remanence Br = 0.63 T,intrinsic coercivity Hcj = 368.68 ka/m and maximum energy product(BH)max = 33.73 kJ/***,magnetic field heat treatment at the temperature close to Curie temperature of Nd2 Fe14B phase was applied to the annealed Fe69.2Nd7 B21Nb2.5Ga0.3 *** results of X-ray diffraction(XRD)and transmission electron microscopy(TEM)indicate that the magnetic field heat treatment can be beneficial for the precipitation of α-***,the Br,Hcj and(BH)max are enhanced by 8.7%,6.3% and 16.3%,respectively.

关键词： Crystallization Magnetic properties Microstructure Magnetic field heat treatment Rare earths

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中非民间法律外交20年:回顾与展望

浙江师范大学学报（社会科学版） 2021年第2期46卷 9-17页

作者：吴卡陈钊浙江师范大学法政学院浙江金华321004

自2000年首届中非合作论坛成立以来,中非民间法律外交稳步前进,经历了被动引导期、主动发展期与协同成型期三个重要时期。二十载通力合作,中非民间法律外交成果有目共睹,但数量短板、质量软肋、对象局限、互动困境等不足也日益显现。中... 详细信息

自2000年首届中非合作论坛成立以来,中非民间法律外交稳步前进,经历了被动引导期、主动发展期与协同成型期三个重要时期。二十载通力合作,中非民间法律外交成果有目共睹,但数量短板、质量软肋、对象局限、互动困境等不足也日益显现。中非间的社会发展差距、法律文化差别与彼此认知偏差以及西方负面舆论影响等,都在一定程度上影响了双方民间法律外交的深入开展。发挥双方法学团体的平台优势、强化双方法学院校的交流合作、建立中非法治人才的联合培训机制、协同开展中非法律研究以及完善涉非法律服务机制等,将为中非民间法律外交的持续推进提供动力保证。

关键词：中非合作论坛中非关系民间外交法律外交

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中非法律外交70年:回顾与展望

非洲研究 2019年第2期15卷 -页

作者：吴卡黄婕浙江师范大学法政学院浙江金华321004 浙江师范大学非洲法律与社会发展研究中心

中非法律外交具有特定的时代背景与重大的现实意义。自新中国成立以来,中非法律外交经历了起步、中断、发展与提速四个历史时期。自2009年"中非合作论坛—法律论坛"设立以来,特别是《北京行动计划(2013—2015)》和《约翰内斯堡行动计划(... 详细信息

中非法律外交具有特定的时代背景与重大的现实意义。自新中国成立以来,中非法律外交经历了起步、中断、发展与提速四个历史时期。自2009年"中非合作论坛—法律论坛"设立以来,特别是《北京行动计划(2013—2015)》和《约翰内斯堡行动计划(2016—2018)》实施六年多来,中非法律外交,无论是官方还是民间,都取得了许多重要成果,但也暴露了一些不足。在中非共建"一带一路"与共推产能合作的新时代背景下,中非法律外交需要在理论构建、数质提升、平台搭建、人才培养和学术研究等方面有新的举措。

关键词：中非法律外交中非关系一带一路

Rock magnetic property of gravity core CSH1 from the northern Okinawa Trough and the effect of early diagenesis

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Acta Oceanologica Sinica 2007年第5期26卷 54-65页

作者： GE Shulan SHI Xuefa wu Yonghua LEE Tehquei XIONG Yingqian SAITO Yoshiki Marine Sedimentation and Environmental Geology Key Laboratory of State Oceanic Administration First Institute of Oceanography State Oceanic Administration Qingdao 266061 China Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China Institute of Earth Sciences Taipei China Geology Survey of Japan Tsukuba 306 - 8567 Japan

Detailed rock magnetic investigations were undertaken at 2 -4 cm interval for the gravity core CSHI （with a length of 17.36 m） from the northern Okinawa Trough. Time-scale of the core was constructed by two characteristic tephras and foraminferal assemblages, indicating an age of 50 ka for the bottom of the core. Except for three tephras and abrupt decrease in surface, there are little changes in all kinds of rock magnetic parameters that can be correlated to the climate change for the last 50 ka. different from the common sediments, most S-ratios （S equals the negative ratio of IRM-0.3T to SIRM, which is an indicator of low coercivity content） of the sediments are smaller than 0. 9, which implies a substantial amount of magnetic minerals with high coercivity. The existence of iron sulphide （ greigite or pyrrhotite） is revealed by representative susceptibility - temperature curves showing 200 350 ℃ Curie temperature in addition to 580 ℃ of magnetite, and also by awful smell during heating and dark heating products. Both the occurrence of authigenic iron sulphide and quick decrease of magnetic parameters near the surface clearly show that sediments from Core CSHI have undergone early diagenesis. The featureless magnetic changes of the whole core except for three tephras mean that the post-depositonal alteration is so strong that most original signals have been destroyed. For the same reason, the organic matter in sediment and sulphate in pore water must have been consumed along with dissolution, precipitation of iron and manganese happening sequencially during the redox reaction series. Great caution must be taken when using these altered chemical parameters for the interpretation of climatic changes.

关键词： northern Okinawa Trough gravity core of CSHI rock magnetic property characteristic tephra early diagenesis

Quantitative climatic reconstruction of the Last Glacial Maximum in China

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Science China Earth Sciences 2019年第8期62卷 1269-1278页

作者： Haibin wu Qin LI Yanyan YU Aizhi SUN Yating LIN Wenqi JIANG Yunli LUO Key Laboratory of Cenozoic Geology and Environment Institute of Geology and GeophysicsChinese Academy of SciencesBeijing100029China CAS Center for Excellence in Life and Paleoenvironment Beijing100044China University of Chinese Academy of Sciences Beijing100049China CAS Center for Excellence in Tibetan Plateau Earth Sciences Beijing100101China Institute of Botany Chinese Academy of SciencesBeijing100093China

Quantitative paleoclimatic reconstruction is crucial for understanding the operation and evolution of the global climate *** example,a quantitative paleoclimatic reconstruction for the Last Glacial Maximum(18±2 ka14C,LGM)is fundamental to understanding the evolution of Earth’s climate during the last glacial-interglacial *** quantitative palaeoclimate reconstructions in China are generally based on statistical comparison of modern pollen assemblages and modern climate *** methods are based on the premise that vegetation-climate interactions remain the same through time,and implicitly assume that the interactions are independent of changes in seasonality and atmospheric ***,these assumptions may not always be valid,which may affect the ***,we present the results of a quantitative study of the LGM climate of China based on an improved inverse vegetation model which incorporates physiological processes combined with a new China Quaternary Pollen *** results indicate that during the LGM,mean annual temperature(ANNT),mean temperature of the coldest month(MTCO)and mean temperature of the warmest month in China were lower by^5.6±0.8,~11.0±1.6 and^2.6±0.9°C,respectively,compared to today,and that the changes in ANNT were mainly due to the decrease of *** ANNT decrease in southern China was^5.5±0.5°*** annual precipitation was lower by^46.3±17.8 mm compared to today and was especially low in northern China(~51.2±21.4 mm)due to the decrease in summer *** of our results with recent outputs from paleoclimatic modelling reveals that while the latter are broadly consistent with our estimated changes in mean annual climatic parameters,there are substantial differences in the seasonal climatic *** results highlight the crucial importance of developing seasonal simulation on paleoclimatic models,as well as the need to improve the quality of paleoclimatic reconstructions based o

关键词： Quantitative paleoclimatic reconstruction Inverse vegetation model Biome Seasonal climate changes Atmospheric CO2 concentration

Characteristics and Formation Mechanism of Giant Long-Runout Landslide: A Case Study of the Gamisi Ancient Landslide in the Upper Minjiang River, China

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Acta Geologica Sinica(English Edition) 2019年第4期93卷 1113-1124页

作者： GUO Changbao wu Ruian ZHANG Yongshuang REN Sanshao YANG Zhihua LI Xue Institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China Key Laboratory of Active Tectonics and Crustal Stability Assessment Beijing 100081China Tianjin Center China Geological SurveyTianjin 300170China

The upper reaches of the Minjiang River are in the eastern margin of the Tibetan Plateau,where active faults are well developed and earthquakes frequently *** climate change and the extremely complex geomechanical properties of rock and soil have resulted in a number of *** on the analysis of remote sensing interpretations,geological field surveys,geophysical prospecting and geological dating results,this paper discusses the developmental characteristics of the Gamisi ancient landslide in Songpan County,Sichuan Province,and investigates its geological age and formation *** study finds that the Gamisi ancient landslide is in the periglacial region of the Minshan Mountain and formed approximately 25 ka *** landslide initiation zone has a collapse and slide zone of approximately 22.65×106–31.7×106 m3 and shows a maximum sliding distance of approximately 1.42 km,with an elevation difference of approximately 310 m between the back wall of the landslide and the leading edge of the accumulation *** landslide movement was characterized by a high speed and long *** the sliding process,the landslide body eroded and dammed the ancient Minjiang River *** ancient river channel was buried 30-60 m below the surface of the landslide accumulation *** prospecting and drilling observations revealed that the ancient riverbed was approximately 80-100 m *** the dam broke,the Minjiang River was migrated to the current channel at the leading edge of the *** Gamisi ancient landslide was greatly affected by the regional crustal uplift,topography,geomorphology and paleoclimatic *** combined action of periglacial karstification and climate change caused the limestone at the rear edge of the landslide fractured,thus providing a lithological foundation for landslide *** tectonic activity along the Minjiang Fault,which runs through the middle and trailing parts of the Gamisi ancient l

关键词： Tibetan plateau ancient landslide Gamisi long runout formation mechanism