检索结果-南通市图书馆

Molecular Oxygen Abundance in Galactic Massive Star Formation Regions Based on SWAS Observations

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2024年第9期24卷 83-98页

作者： Bing-Ru Wang Di Li Paul F.Goldsmith jingwen Wu Chao-Wei Tsai Donghui Quan Xia Zhang junzhi Wang gary j.melnick jin-Zeng Li gary A.Fuller jinjin Xie National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China Tsinghua University Beijing 100084China University of Chinese Academy of Sciences Beijing 100049China Research Center for Astronomical Computing Zhejiang LaboratoryHangzhou 311100China jet Propulsion Laboratory California Institute of TechnologyPasadenaCA 91109USA Institute for Frontiers in Astronomy and Astrophysics Beijing Normal UniversityBeijing 102206China Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Guangxi Key Laboratory for Relativistic Astrophysics School of Physical Science and TechnologyGuangxi UniversityNanning 530004China Center for Astrophysics Harvard&Smithsonian60 Garden StreetMS 66CambridgeMA 02138USA jodrell Bank Center for Astrophysics Department of Physics&AstronomyUniversity of ManchesterOxford RoadManchesterM139PLUK I.Physikalisches Institut University of CologneZülpicher Str.7750937 KölnGermany

Molecular oxygen abundance is a key parameter in understanding the chemical network of the interstellar *** estimate the molecular oxygen column density and abundance for a sample of Galactic massive star formation regions based on observations from the Submillimiter Wave Astronomy Satellite(SWAS)*** obtained an averaged O_(2)spectrum based on this sample using the(SWAS)survey data(O_(2),487.249 GHz,N=3-1,j=3-2).No emission or absorption feature is seen around the supposed central velocity with a total integration time of t_(total)=8.67×10^(3)hr and an rms noise per channel of 1.45 m *** a kinetic temperature T_(kin)=30 K,we derive the 3σupper limit of the O_(2)column density to be 3.3×10^(15)cm^(-2),close to the lowest values reported in Galactic massive star formation regions in previous *** corresponding O_(2)abundance upper limit is6.7×10^(-8),lower than all previous results based on SWAS observations and is close to the lowest reported value in massive star formation *** a galactic scale,our statistical results confirm a generally low O_(2)abundance for Galactic massive star formation *** abundance is also lower than results reported in extragalactic sources.

关键词： ISM:molecules galaxies:abundances ISM:lines and bands Galaxy:abundances

Revolutionizing plasmonic platform via magnetic field-assisted confined ultrafast laser deposition of high-density,uniform,and ultrafine nanoparticle arrays

在线全文

学校读者我要写书评

暂无评论

International journal of Extreme Manufacturing 2024年第3期6卷 428-438页

作者： jin Xu Lingfeng Wang Peilin Yang Haoqing jiang Huai Zheng Licong An Xingtao Liu gary j Cheng School of Industrial Engineering Purdue UniversityWest LafayetteIN 47906United States of America Institute of Technological Sciences Wuhan UniversityWuhanHubei 430072People’s Republic of China

The remarkable capabilities of 2D plasmonic surfaces in controlling optical waves havegarnered significant ***,the challenge of large-scale manufacturing of uniform,well-aligned,and tunable plasmonic surfaces has hindered their *** address this,we present a groundbreaking tunable plasmonic platform design achieved throughmagnetic field(MF)assisted ultrafast laser direct deposition in *** precise control of metal nanoparticles(NPs),with cobalt(Co)serving as the model material,employing an MF,and fine-tuning ultrafast laser parameters,we have effectively converted coarse and non-uniform NPs into densely packed,uniform,and ultrafine NPs(~3 nm).This revolutionary advancement results in the creation of customizable plasmonic‘hot spots,’which play a pivotal role insurface-enhanced Raman spectroscopy(SERS)*** profound impact of this designable plasmonic platform lies in its close association with plasmonic resonance and *** the plasmonic nanostructures resonate with incident light,they generate intense local electromagnetic fields,thus vastly increasing the Raman scattering *** enhancement leads to an outstanding 2–18 fold boost in SERS performance and unparalleled sensing sensitivity down to 10^(-10)***,the plasmonic platform also demonstratesrobustness,retaining its sensing capability even after undergoing 50 cycles of rinsing andre-loading of ***,this work adheres to green manufacturing standards,making it an efficient and environmentally friendly method for customizing plasmonic‘hot spots’inSERS *** study not only achieves the formation of high-density,uniform,and ultrafine NP arrays on a tunable plasmonic platform but also showcases the profound relation betweenplasmonic resonance and energy *** outstanding results observed in SERS sensors further emphasize the immense potential of this technology for energy-relatedapplications,including photocatalysis,ph

关键词： magnetic field manipulation laser deposition metasurface SERS

Leflunomide: A versatile additive for defect reduction, enhanced optoelectronic properties and environmental stability of perovskite films

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第4期17卷 2628-2637页

作者： Dingyue Sun Ming Peng Taijin Wang Longju Yi Shizuo Zhang Feng Liu gary j.Cheng The Institute of Technological Sciences Wuhan UniversityWuhan 430072China School of Power and Mechanical Engineering Wuhan UniversityWuhan 430072China School of Industrial Engineering Purdue UniversityWest LafayetteIN 47906USA

The development of perovskite photoelectric devices with excellent performance is largely dependent on the defects in the perovskite *** address this issue,a specific drug,leflunomide(LF,C_(12)H_(9)F_(3)N_(2)O_(2)),was incorporated into the perovskite to reduce defects and improve its photoelectric *** is believed that the C=O bond on LF molecule can interact with the uncoordinated Pb2+of the perovskite,thereby reducing non-radiative *** novel approach of incorporating LF into perovskite films has the potential to revolutionize the development of high-performance perovskite photoelectric *** trifluoromethyl functional(–CF_(3))group on LF can form a protective layer on the surface of the perovskite film,shielding it from water ***,LF can be utilized to alter the nucleation position of perovskite,thus minimizing the number of defects and optimizing the film ***,the LF-doped perovskite film displays low trap density and high photoelectric *** LF-doped perovskite film showed a trap density of 8.28×10^(11),which is notably lower than the 2.04×10^(12) of the perovskite film without *** responsivity and detectivity of the LF-doped perovskite photodetector were 0.771 A/W and 2.81×10^(11) jones,respectively,which are much higher than the 0.23 A/W and 1.06×10^(10) jones of the LF-undoped perovskite ***,the LF-doped photodetector maintained an initial photocurrent of 86%after 30 days of storage in air,indicating drastically increased environmental *** strongly suggests that LF is an effective additive for perovskites utilized in optoelectronic devices with high performance.

关键词： leflunomide additive engineering defect passivation perovskite

New insights into nitric oxide biosynthesis underpin lateral root development

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Molecular Plant 2024年第5期17卷 691-693页

作者： Kapuganti jagadis Gupta Nidhi Yadav Aprajita Kumari gary j.Loake National Institute for Plant Genome Research Aruna Asaf Ali MargNew Delhi 110070India Institute of Molecular Plant Sciences School of Biological SciencesUniversity of EdinburghEH93BF EdinburghUK Centre for Engineering Biology School of Biological SciencesUniversity of EdinburghEH93BF EdinburghUK

In recent years,nitric oxide(NO)has emerged as a key redox signaling molecule in plants functioning in the regulation of key developmental programs and the orchestration of responses to a plethora of environmental cues(Kolbert et al.,2019).The predominant route for the transfer of NO bioactivity is through S-nitrosylation,the addition of an NO moiety to a protein cysteine thiol to form an S-nitrosothiol(Yun et al.,2011).Specificity for this process is established by the structural constraints imposed by tertiary protein structure in gating access to given cysteine redox switches and associated proteins that can either facilitate the addition or removal of the NO moiety at these residues(Umbreen et al.,2018).

关键词： moiety addition redox

Application of a simplified ADM1 for full-scale anaerobic co-digestion of cattle slurry and grass silage:assessment of input variability

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Environmental Science & Engineering 2024年第4期18卷 125-139页

作者： Sofia Tisocco Sören Weinrich gary Lyons Michael Wills Xinmin Zhan Paul Crosson Civil Engineering College of Science and EngineeringUniversity of GalwayGalwayH91 TK33Ireland Teagasc Animal and Bioscience Research Department Animal and Grassland Research and Innovation CentreDunsanyC15 PW93Ireland Biochemical Conversion Department Deutsches Biomasseforschungszentrum gemeinnützige GmbHLeipzig 04347Germany Faculty of Energy·Building Services·Environmental Engineering Münster University of Applied SciencesSteinfurt 48565Germany Agri-Food and Biosciences Institute HillsboroughBT266DRUK Ryan Institute University of GalwayGalwayH91 TK33Ireland MaREI Research Centre for Energy Climate and MarineRyan InstituteUniversity of GalwayGalwayH91 TK33Ireland

Mathematical modeling of anaerobic digestion is a powerful tool to predict gas yields and optimize the *** Anaerobic Digestion Model No.1(ADM1)is a widely implemented model for this ***,modeling full-scale biogas plants is challenging due to the extensive substrate and parameter characterization *** study describes the modification of the ADM1 through a simplification of individual process phases,characteristic components and required ***,the ability of the simplified model to simulate the co-digestion of grass silage and cattle slurry was evaluated using data from a full-scale biogas *** impacts of substrate composition(crude carbohydrate,protein and lipid concentration)and variability of carbohydrate degradability on simulation results were assessed to identify the most influential *** indicated that the simplified version was able to depict biogas and biomethane production with average model efficiencies,according to the Nash-Sutcliffe efficiency(NSE)coefficient,of 0.70 and 0.67,respectively,and was comparable to the original ADM1(average model efficiencies of 0.71 and 0.63,respectively).The variability of crude carbohydrate,protein and lipid concentration did not significantly impact biogas and biomethane output for the data sets *** contrast,carbohydrate degradability seemed to explain much more of the variability in the biogas and methane ***,the application of simplified models provides a reliable basis for the process simulation and optimization of full-scale agricultural biogas plants.

关键词： ADM1 Agricultural feedstocks Biogas technology Input variability Parameter estimation

Electronic properties of 2D materials and their junctions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Materials Science 2024年第1期6卷 1-23页

作者： Taposhree Dutta Neha Yadav Yongling Wu gary j.Cheng Xiu Liang Seeram Ramakrishna Aoussaj Sbai Rajeev Gupta Aniruddha Mondal Zheng Hongyu Ashish Yadav Department of Chemistry Indian Institute of Engineering Science and TechnologyShibpurWest Bengal711103India Center for Advanced Laser Manufacturing(CALM) Shandong University of TechnologyZibo255000PR China School of Industrial Engineering Purdue University315 N.Grant St.West LafayetteIN47907United States Birck Nanotechnology Center Purdue University1205 W State St.West LafayetteIN47907United States Advanced Materials Institute Qilu University of TechnologyShandong Academy of SciencesJinan250014PR China Nanoscience and Nanotechnology Initiative National University of Singapore10 Kent Ridge Crescent119260Singapore Faculty of Applied Phsyics and Mathematics Gdansk University of Technology Narutowicza 11/1280233GdanskPoland Department of Physics School of EngineeringUniversity of Petroleum&Energy StudiesDehradun248007UttarakhandIndia Department of Physics National Institute of Technology DurgapurDurgapur713209West BengalIndia

With an extensive range of distinctive features at nano meter-scale thicknesses,two-dimensional(2D)materials drawn the attention of the scientific *** tremendous advancements in exploratory research on 2D materials,knowledge of 2D electrical transport and carrier dynamics still in its ***,here we highlighted the electrical characteristics of 2D materials with electronic band structure,electronic transport,dielectric constant,carriers *** atomic thinness of 2D materials makes substantially scaled field-effect transistors(FETs)with reduced short-channel effects conceivable,even though strong carrier mobility required for high performance,low-voltage device *** also discussed here about factors affecting 2D materials which easily enhanced the activity of those materials for various ***,Those 2D materials used in state-of-the-art electrical and optoelectronic devices because of the extensive nature of their electronic band structure.2D materials offer unprecedented freedom for the design of novel p-n junction device topologies in contrast to conventional bulk *** also,describe the numerous 2D p-n junctions,such as homo junction and hetero junction including mixed dimensional ***,we talked about the problems and potential for the future.

关键词： 2D materials Electrical properties p-n junctions Mixed hereto junctions Homo junctions Electrical transport

Outcomes of critically ill children with pre-existing mental health conditions

在线全文

学校读者我要写书评

暂无评论

Pediatric Investigation 2024年第2期8卷 108-116页

作者： Conrad Krawiec Morgan Cash gary Ceneviva Zizhong Tian Shouhao Zhou Neal j.Thomas Department of Pediatrics Pediatric Critical Care MedicinePenn State Hershey Children's HospitalPennsylvaniaUSA Department of Public Health Sciences Division of Biostatistics and BioinformaticsPennsylvania State University College of MedicinePennsylvaniaUSA Department of Public Health_Sciences Pennsylvania State University College of MedicinePennsylvaniaUSA

Importance:Critically ill children with pre-existing mental health conditions may have an increased risk of poor health ***:We aimed to evaluate if pre-existing mental health conditions in critically ill pediatric patients would be associated with worse clinical outcomes,compared to children with no documented mental health ***:This retrospective observational cohort study utilized the TriNetX electronic health record database of critically ill subjects aged 12-18 *** were analyzed for demographics,pre-existing conditions,diagnostic,medication,procedural codes,and ***:From a dataset of 102027 critically ill children,we analyzed 1999 subjects(284[14.2%]with a pre-existing mental health condition and 1715[85.8%]with no pre-existing mental health condition).Multivariable analysis demonstrated that death within one year was associated with the presence of pre-existing mental health conditions(odds ratio 8.97[3.48-23.15],P<0.001),even after controlling for the presence of a complex chronic ***:The present study demonstrates that the presence of pre-existing mental health conditions was associated with higher odds of death within 1 year after receiving critical ***,the confidence interval was wide and hence,the findings are *** studies with a larger sample size may be necessary to evaluate the true long-term impact of children with pre-existing mental health conditions who require critical care services.

关键词： Critical care Psychiatry Psychology Public health

青藏高原及其周边三叠纪综合地层、生物群与古地理演化

在线全文

学校读者我要写书评

暂无评论

中国科学：地球科学 2024年第4期54卷 1171-1210页

作者：武桂春纪占胜 gary GLASH 曾庆高姚建新中国地质科学院地质研究所自然资源部地层与古生物重点实验室北京100037 中国地质科学院自然资源部深地科学与探测技术实验室北京100094 Department of Geology and Environmental Sciences State University of New York-FredoniaFredoniaNY 14063USA 西藏自治区地质矿产勘察开发局拉萨850010

青藏高原三叠纪古生物化石丰富,目前已建立了以菊石、牙形类、双壳类、腕足类和放射虫化石为主的海相生物序列以及以孢粉类化石为主的陆相生物序列,为青藏高原三叠纪年代地层划分对比提供了生物标尺.青藏高原在三叠纪整体处于海洋沉积区... 详细信息

青藏高原三叠纪古生物化石丰富,目前已建立了以菊石、牙形类、双壳类、腕足类和放射虫化石为主的海相生物序列以及以孢粉类化石为主的陆相生物序列,为青藏高原三叠纪年代地层划分对比提供了生物标尺.青藏高原在三叠纪整体处于海洋沉积区,海相三叠系发育,主要沉积类型有滨浅海相碎屑岩、浅海台地相碳酸盐岩、半深海斜坡-深海相碎屑岩、硅质岩、海陆过渡相含煤碎屑岩、滨浅海或陆相火山碎屑岩.青藏高原各个地层区的沉积地层序列在垂向上明显分为4个阶段:(1)早三叠世初期广泛接受海侵,发育台地相碳酸盐岩和滨浅海相碎屑岩沉积;(2)中三叠世拉丁期至晚三叠世卡尼期海侵规模最大,与早三叠世相比,沉积相整体变深,发育半深海斜坡-深海相薄层碳酸盐岩、细碎屑岩、硅质岩沉积,部分地区岩浆活动强烈;(3)晚三叠世诺利期海退,沉积相整体变浅,大面积发育台地相碳酸盐岩沉积和滨浅海碎屑岩沉积,在秦-祁-昆一带多表现为陆相地层沉积或陆相剥蚀区;(4)瑞替期持续海退,发育滨浅海碎屑岩或海陆过渡相含煤碎屑岩沉积.根据沉积地层的横向展布和垂向变化,本文对青藏高原三叠纪的沉积古地理按早三叠世、中三叠世-晚三叠世卡尼期、晚三叠世诺利期和晚三叠世瑞替期4个时期进行了描述.整体上,青藏高原在三叠纪是以印度河-雅鲁藏布江缝合带为拉张中心,沉积相向南、北两侧由深变浅,形成了南部冈瓦纳古陆被动边缘沉积体系和北部欧亚古陆被动大陆边缘沉积体系.班公湖-怒江缝合带与南侧的冈底斯地块(或拉萨地块)和北侧的南羌塘地块在沉积特征上比较一致,不是裂解拉张中心.古生物区系研究同样显示印度河-雅鲁藏布江缝合带在三叠纪时期是一个重要的古生物地理区系分界线,班公湖-怒江缝合带在该时期则不具有古生物地理区系分隔的意义.三叠纪时期是潘吉亚超大陆(Pangea)裂解的高峰期,该事件在青藏高原的主要响应是早、中三叠世沿印度河-雅鲁藏布江缝合带发生伸展裂解.印支运动在青藏高原主要表现为晚三叠世地壳抬升引起的沉积相变,在秦-祁-昆一带表现为海相沉积变为陆相沉积或陆相剥蚀区,而在冈底斯至南羌塘的广大地区,表现为台地相碳酸盐岩变为滨浅海相碎屑岩或海陆过渡相含煤碎屑岩.

关键词：青藏高原三叠系生物地层岩石地层古生物区系沉积古地理

Extracellular Disintegration of Viral Proteins as an Innovative Strategy for Developing Broad-Spectrum Antivirals Against Coronavirus

在线全文

学校读者我要写书评

暂无评论

CCS Chemistry 2024年第2期6卷 487-496页

作者： Ke Sun Zhe Ding Xiaoying jia Haonan Cheng Yingwen Li Yan Wu Zhuoyu Li Xiaohua Huang Fangxu Pu Entao Li Guiyou Wang Wei Wang Yun Ding gary Wong Sandra Chiu jiaming Lan Aiguo Hu Shanghai Key Laboratory of Advanced Polymeric Materials School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237 CAS Key Laboratory of Molecular Virology&Immunology Chinese Academy of SciencesShanghai 200031 University of the Chinese Academy of Sciences Beijing 100049 State Key Laboratory of Virology Center for Biosafety Mega-ScienceWuhan Institute of VirologyChinese Academy of SciencesWuhan 430071 Division of Life Sciences and Medicine University of Science and Technology of ChinaHefeiAnhui 230027 Department of Clinical Laboratory The First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhui 230001

The coronavirus disease 2019(COVID-19)pandemic,caused by severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),has claimedmillions of lives and caused innumerable economic losses ***,state-of-the-art treatments still lag behind the continual emergence of new *** to resolving this issue is developing antivirals to deactivate coronaviruses regardless of their structural ***,we report an innovative antiviral strategy involving extracellular disintegration of viral proteins with hyperanion-grafted enediyne(EDY)*** core EDY generates reactive radical species and causes significant damage to the spike protein of coronavirus,while the hyperanion groups ensure negligible cytotoxicity of the *** EDYs exhibit antiviral activity down to nanomolar concentrations,and the selectivity index of up to 20,000 against four kinds of human coronavirus,including the SARS-CoV-2 Omicron variant,suggesting the high potential of this new strategy in combating the COVID-19 pandemic and a future“disease X.”

关键词： enediyne broad spectrum antiviral protein disintegration coronavirus polyanions