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Catalytically active atomically thin cuprate with periodic Cu single sites

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National Science Review 2023年第1期10卷 226-235页

作者： Huimin Yang Shibo Xi Na Guo Mu Wang Lingmei Liu Pin Lyu Xiaolong Yu Jing Li Haomin Xu Xiao Hai Zejun Li Xinzhe Li Tao Sun Xiaoxu Zhao Yu Han Wei Yu Jie Wu Chun Zhang Honghan Fei Ming joo Koh Jiong Lu Department of Chemistry National University of Singapore Institute of Chemical and Engineering Sciences Department of Physics National University of Singapore Advanced Membranes and Porous Materials Center King Abdullah University of Science and Technology SDU-ANU Joint Science College Shandong University School of Materials Science and Engineering Peking University Centre for Advanced 2D Materials and Graphene Research Centre National University of Singapore Department of Chemistry Tongji University

Rational design and synthesis of catalytically active two-dimensional(2D) materials with an abundance of atomically precise active sites in their basal planes remains a great ***,we report a ligand exchange strategy to exfoliate bulk [Cu4(oh)6] [O3S(CH2)4SO3] cuprate crystals into atomically thin 2D cuprate layers([Cu2(oh)3]+).The basal plane of 2D cuprate layers contains periodic arrays of accessible unsaturated Cu(Ⅱ) single sites(2D-CuSSs),which are found to promote efficient oxidative Chan-Lam *** me chanistic studies reveal that the reactions proceed via coordinatively unsaturated CuO4(Ⅰ) single sites with the formation of Cu(Ⅰ) species in the rate-limiting step,as corroborated by both operando experimental and theoretical *** robust stability of 2D-CuSSs in both batch and continuous flow reactions,coupled with their recyclability and good performance in complex molecule derivatization,render 2D-CuSSs attractive catalyst candidates for broad utility in fine chemical synthesis.

关键词： exfoliation nanosheet heterogeneous catalysis

Multicenter evaluation of recurrence in endoscopic submucosal dissection and endoscopic mucosal resection in the colon:A Western perspective

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World Journal of Gastrointestinal Endoscopy 2023年第6期15卷 458-468页

作者： Mike T Wei Margaret J Zhou Andrew A Li Andrew Ofosu joo Ha Hwang Shai Friedland Department of Gastroenterology and Hepatology Stanford University Medical CenterPalo AltoCA 94306United States Department of Gastroenterology University of Cincinnati College of MedicineCincinnatiOH 45267United States

BACKGROUND While colon endoscopic mucosal resection(EMR)is an effective technique,removal of larger polyps often requires piecemeal resection,which can increase recurrence *** submucosal dissection(ESD)in the colon offers the ability for en bloc resection and is well-described in Asia,but there are limited studies comparing ESD vs EMR in the *** To evaluate different techniques in endoscopic resection of large polyps in the colon and to identify factors for *** The study is a retrospective comparison of ESD,EMR and knife-assisted endoscopic resection performed at Stanford University Medical Center and Veterans Affairs Palo Alto Health Care System between 2016 and ***-assisted endoscopic resection was defined as use of electrosurgical knife to facilitate snare resection,such as for circumferential ***≥18 years of age undergoing colonoscopy with removal of polyp(s)≥20 mm were *** primary outcome was recurrence on *** A total of 376 patients and 428 polyps were *** polyp size was greatest in the ESD group(35.8 mm),followed by knife-assisted endoscopic resection(33.3 mm)and EMR(30.5 mm)(P<0.001).ESD achieved highest en bloc resection(90.4%)followed by knife-assisted endoscopic resection(31.1%)and EMR(20.2%)(P<0.001).A total of 287 polyps had follow-up(67.1%).On follow-up analysis,recurrence rate was lowest in knife-assisted endoscopic resection(0.0%)and ESD(1.3%)and highest in EMR(12.9%)(P=0.0017).En bloc polyp resection had significantly lower rate of recurrence(1.9%)compared to non-en bloc(12.0%,P=0.003).On multivariate analysis,ESD(in comparison to EMR)adjusted for polyp size was found to significantly reduce risk of recurrence[adjusted hazard ratio 0.06(95%CI:0.01-0.57,P=0.014)].CONCLUSION In our study,EMR had significantly higher recurrence compared to ESD and knife-assisted endoscopic *** found factors including resection by ESD,en bloc removal,and use of circumferentia

关键词： Endoscopic mucosal resection Endoscopic submucosal dissection Recurrence Colonoscopy Polypectomy

As (V) adsorption characteristics of iron oxide coated sands

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Chinese Journal Of Geochemistry 2006年第B8期25卷 142-142页

作者： Kyung-Seok Ko Jae Gon Kim In-Suk oh joo Sung Ahn Heejun Suk Hyoung-Soo Kim Korea Institute of Geosciences ＆ Mineral Resources （KIGAM） Geological ＆ Environmental Hazards Division Daejeon Korea Kongju National University/Department of Geoenvironmental Sciences Kongju Korea Korea Institute of Geosciences ＆ Mineral Resources （KIGAM） Groundwater ＆ Geothermal Division Daejeon Korea Korea Institute of Water and Environment （KIWE） Dam Engineering Research Center Daejeon Korea

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利用ASTER图像和GIS并结合频率比、逻辑回归和人工神经网络模型获得的滑坡脆弱性图

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水文地质工程地质技术方法动态 2012年第4期 46-46页

作者： Jaewon Choi Hyun-joo oh 赵玉军(翻译) 孙建平(校对) Geospatial Analysis & Evaluation Center National Disaster Management Institute Ministry of PublicAdministration and Security 253-42 Gongdeok 2-Dong Mapo-Gu S eoul 121-719 Republic of Korea Dept. of Oversea Mineral Resource Korea Institute of Geoscience and Mineral Resources (KIGAM) 92 Gwahang-no Yuseong-gu Daejeon 305-350 Republic of Korea 不详

根据先进星载热发射和反辐射计（ASTER）图像获取滑坡相关因素，并利用地理信息系统（GIS）开发、应用和验证韩国Boun地区滑坡脆弱性分析的综合技术。从ASTER图像中获取数字高程模型（DEM）、线性特征、归一化差值植被指数（NDVI）和土... 详细信息

根据先进星载热发射和反辐射计（ASTER）图像获取滑坡相关因素，并利用地理信息系统（GIS）开发、应用和验证韩国Boun地区滑坡脆弱性分析的综合技术。从ASTER图像中获取数字高程模型（DEM）、线性特征、归一化差值植被指数（NDVI）和土地覆盖因素并进行分析。根据DEM地形数据库评估边坡、方位和曲率。根据已有空间数据库并利用频率比（FR）、逻辑回归（LR）和人工神经网络模型（ANN）鉴定和量化检测的滑坡位置与6种相关因素之间的关系。在叠加分析中把这些相互关系用作因子额定值以创建滑坡脆弱性指数和滑坡脆弱性图。随后，在FR、LR和ANN模型中作为新输人因子结合并应用3种滑坡脆弱性图，从而创建改进的滑坡脆弱性图。通过对比在模型实验中未使用的已知滑坡位置来验证所有这些滑坡脆弱性图。对比利用3种滑坡相关输入参数创建的改进精度的综合滑坡脆弱性图（FR}莫型为87．00％；LRN型为88．21％；ANN模型为86．51％）与利用ASTER图像中6种因素创建的单独滑坡脆弱性图（FR丰莫型为84．34％；LR模型为85．40％；ANN模型为74．29％）。

关键词：人工神经网络模型脆弱性分析 ASTER 图像获取逻辑回归频率比滑坡利用

腐植酸与负载金属氢氧化物的固体颗粒在固—水界面的缔合作用

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腐植酸与负载金属氢氧化物的固体颗粒在固—水界面的缔合作用

An Earth-mass planet in a time of COVID-19:KMT-2020-BLG-0414Lb

第七届全国绿色环保肥料（农药）新技术、新产品交流会

作者： Jin Chul joo Charles D.Shackelford Kenneth F.Reardon 徐景芳冯娜盖希坤乔英云美国科罗拉多州大学山东科技大学化工学院

腐植酸与土壤表面矿物质结合能够显著的改善土壤的物化性能,由此影响矿物表面的有机污染物的迁移转化。由于不同的矿物表面对有机污染物吸附—解吸量不同,本文采用空白沙粒、负载α-FeO（oh）的沙粒（FES）和负载AlO的沙粒（ALS）3种模... 详细信息

腐植酸与土壤表面矿物质结合能够显著的改善土壤的物化性能,由此影响矿物表面的有机污染物的迁移转化。由于不同的矿物表面对有机污染物吸附—解吸量不同,本文采用空白沙粒、负载α-FeO（oh）的沙粒（FES）和负载AlO的沙粒（ALS）3种模型吸附剂在pH为2的条件下对地面腐植酸进行评价。通过扫描电镜/能谱仪和光电子能谱分析,结果显示负载金属（氢）氧化物的石英矿物颗粒上吸附的腐植酸膜相对均匀、稳定。2个负载金属（氢）氧化物的沙粒均具有较强的滞后效应,而空白沙粒滞的后效应较弱,这表明腐植酸在模型吸附剂上的吸附解吸依赖于腐植酸和吸附利的表面元素之间的相互作用及亲和力。腐植酸分子在负载金属（氢）氧化物的沙粒上的吸附是由低分子量腐植酸组分的配体交换和高分子量腐植酸组分的疏水作用,说明考察腐植酸吸附动力学及腐植酸亚组分之间吸附解吸作用具有重要意义。

关键词：吸附解吸滞后效应负载金属(氢)氧化物的固体颗粒分子量组分地面腐植酸

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Research in Astronomy and Astrophysics 2021年第9期21卷 243-261页

作者： Weicheng Zang Cheongho Han Iona Kondo Jennifer C.Yee Chung-Uk Lee Andrew Gould Shude Mao Leandro de Almeida Yossi Shvartzvald Xiangyu Zhang Michael D.Albrow Sun-Ju Chung Kyu-Ha Hwang Youn Kil Jung Yoon-Hyun Ryu In-Gu Shin Sang-Mok Cha Dong-Jin Kim Hyoun-Woo Kim Seung-Lee Kim Dong-joo Lee Yongseok Lee Byeong-Gon Park Richard W.Pogge John Drummond Thiam-Guan Tan JoséDias do Nascimento Júnior Dan Maoz Matthew T.Penny Wei Zhu Ian A.Bond Fumio Abe Richard Barry David P.Bennett Aparna Bhattacharya Martin Donachie Hirosane Fujii Akihiko Fukui Yuki Hirao Yoshitaka Itow Rintaro Kirikawa Naoki Koshimoto Man Cheung Alex Li Yutaka Matsubara Yasushi Muraki Shota Miyazaki Greg Olmschenk Clément Ranc Nicholas J.Rattenbury Yuki Satoh Hikaru Shoji Stela Ishitani Silva Takahiro Sumi Daisuke Suzuki Yuzuru Tanaka Paul J.Tristram Tsubasa Yamawaki Atsunori Yonehara Andreea Petric Todd Burdullis Pascal Fouqué Department of Astronomy Tsinghua UniversityBeijing 100084China Department of Physics Chungbuk National UniversityCheongju 28644Republic of Korea Department of Earth and Space Science Graduate School of ScienceOsaka UniversityToyonakaOsaka 560-0043Japan Center for Astrophysics j Harvard&Smithsonian 60 Garden St.CambridgeMA 02138USA Korea Astronomy and Space Science Institute Daejon 34055Republic of Korea University of Science and Technology Korea(UST)217 Gajeong-ro Yuseong-guDaejeon 34113Republic of Korea Max-Planck-Institute for Astronomy Königstuhl 1769117 HeidelbergGermany Department of Astronomy Ohio State University140 W.18th Ave.ColumbusOH 43210USA National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China Universidade Federal do Rio Grande do Norte(UFRN) Departamento de F´1sica59078-970NatalRNBrazil Department of Particle Physics and Astrophysics Weizmann Institute of ScienceRehovot 76100Israel University of Canterbury Department of Physics and AstronomyPrivate Bag 4800Christchurch 8020New Zealand School of Space Research Kyung Hee UniversityYonginKyeonggi 17104Republic of Korea Possum Observatory PatutahiGisbourneNew Zealand Perth Exoplanet Survey Telescope PerthAustralia School of Physics and Astronomy Tel-Aviv UniversityTel-Aviv 6997801Israel Department of Physics and Astronomy Louisiana State UniversityBaton RougeLA 70803 USA Canadian Institute for Theoretical Astrophysics University of Toronto60 St George StreetTorontoON M5S 3H8Canada Institute of Natural and Mathematical Sciences Massey UniversityAuckland 0745New Zealand Institute for Space-Earth Environmental Research Nagoya UniversityNagoya 464-8601Japan Code 667 NASA Goddard Space Flight CenterGreenbeltMD 20771USA Department of Astronomy University of MarylandCollege ParkMD 20742USA Department of Physics University of AucklandPrivate Bag 92019AucklandNew Zealand Department of Earth and Planetary Science Graduate School of ScienceThe University of Tokyo7-3-1 Hongo

We report the discovery of KMT-2020-BLG-0414 Lb,with a planet-to-host mass ratio q2=0.9-1.2×10-5=3-4 q⊕at 1σ,which is the lowest mass-ratio microlensing planet to *** with two other recent discoveries(4?q/q⊕?6),it fills out the previous empty sector at the bottom of the triangular(log s,log q)diagram,where s is the planet-host separation in units of the angular Einstein radiusθ***,these discoveries call into question the existence,or at least the strength,of the break in the mass-ratio function that was previously suggested to account for the paucity of very low-q *** to the extreme magnification of the event,Amax~1450 for the underlying single-lens event,its light curve revealed a second companion with q3~0.05 and|log s3|~1,i.e.,a factor~10 closer to or farther from the host in *** measurements of the microlens parallaxπE and the angular Einstein radiusθE allow estimates of the host,planet and second companion masses,(M1,M2,M3)~(0.3 M⊙,1.0 M⊕,17 MJ),the planet and second companion projected separations,(a⊥,2,a⊥,3)~(1.5,0.15 or 15)au,and system distance DL~1 *** lens could account for most or all of the blended light(I~19.3)and so can be studied immediately with high-resolution photometric and spectroscopic observations that can further clarify the nature of the *** planet was found as part of a new program of high-cadence follow-up observations of high-magnification *** detection of this planet,despite the considerable difficulties imposed by COVID-19(two KMT sites and OGLE were shut down),illustrates the potential utility of this program.

关键词： gravitational lensing:micro

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