检索结果-南通市图书馆

Autonomous scanning probe microscopy investigations over WS_(2)and Au{111}

npj Computational Materials 2022年第1期8卷 916-922页

作者： John C.Thomas Antonio Rossi Darian Smalley Luca Francaviglia Zhuohang Yu Tianyi Zhang Shalini Kumari joshua a.robinson Mauricio Terrones Masahiro Ishigami Eli Rotenberg Edward S.Barnard Archana Raja Ed Wong D.Frank Ogletree Marcus M.Noack Alexander Weber-Bargioni Molecular Foundry Lawrence Berkeley National LaboratoryBerkeleyCA94720United States Advanced Light Source Lawrence Berkeley National LaboratoryBerkeleyCA94720United States Department of Physics and NanoScience Technology Center University of Central FloridaOrlandoFL32816United States Department of Materials Science and Engineering The Pennsylvania State UniversityUniversity ParkPA16082United States Center for Two-Dimensional and Layered Materials The Pennsylvania State UniversityUniversity ParkPA16802United States Department of Physics and Department of Chemistry The Pennsylvania State UniversityUniversity ParkPA16802United States Center for Advanced Mathematics for Energy Research Applications Lawrence Berkeley National LaboratoryBerkeleyCA94720United States

Individual atomic defects in 2D materials impact their macroscopic *** the interplay is challenging,however,intelligent hyperspectral scanning tunneling spectroscopy(STS)mapping provides a feasible solution to this technically difficult and time consuming ***,dense spectroscopic volume is collected autonomously via Gaussian process regression,where convolutional neural networks are used in tandem for spectral *** data enable defect segmentation,and a workflow is provided for machine-driven decision making during experimentation with capability for user *** provide a means towards autonomous experimentation for the benefit of both enhanced reproducibility and *** investigations on WS_(2)sulfur vacancy sites are explored,which is combined with local density of states confirmation on the Au{111}herringbone *** vacancies,pristine WS_(2),Au face-centered cubic,and Au hexagonal close-packed regions are examined and detected by machine learning methods to demonstrate the potential of artificial intelligence for hyperspectral STS mapping.

关键词： autonomous consuming packed

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Exploration of channel width scaling and edge states in transition metal dichalcogenides

引用

Nano Research 2018年第4期11卷 1768-1774页

作者： Feng Zhang Chia-Hui Lee joshua A. robinson Joerg Appenzeller Department of Electrical and Computer Engineering Brick Nanotechnology Center Purdue University West Lafayette IN 47907 USA Department of Materials Science and Engineering The Pennsylvania State University University Park PA 16802 USA

We explore the impact of edge states in three types of transition metal dichalcogenides （TMDs）, namely metallic Td-phase WTe2 and semiconducting 2H-phase MoTe2 and MoS2, by patterning thin flakes into ribbons with varying channel widths. No obvious charge depletion at the edges is observed for any of these three materials, in contrast to observations made for graphene nanoribbon devices. The semiconducting ribbons are characterized in a three-terminal field-effect transistor （FET） geometry. In addition, two ribbon array designs have been carefully investigated and found to exhibit current levels higher than those observed for conventional one-channel devices. Our results suggest that device structures incorporating a high number of edges can improve the performance of TMD FETs. This improvement is attributed to a higher local electric field, resulting from the edges, increasing the effective number of charge carriers, and the absence of any detrimental edge-related scattering.

关键词： two-dimensional (2D)-layered materials edge states WTe2 MoTe2 MoS2 channel width scaling

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Do phytotoxic allelochemicals remain in ashes after burning Chrysanthemoides monilifera subsp. monilifera(boneseed)?

引用

Journal of Environmental Sciences 2016年第6期28卷 109-119页

作者： Md.Abdullah Yousuf Al Harun joshua Johnson Randall W.robinson Institute for Sustainability and Innovation College of Engineering and ScienceVictoria University

Australia is facing challenges in controlling Chrysanthemoides monilifera subsp. monilifera（boneseed）. However, burning has achieved some success in this regard. We aimed to investigate the comparative phytotoxicity of boneseed dried powder and ashes（burnt at 450℃ and250℃）. Phenolic compounds in powder and ashes were measured using Folin–Ciocalteu assay and HPLC. The phytotoxicity of boneseed powder and ash extracts was assessed through germination bioassay on Lactuca sativa and the phytotoxicity of litter and ashes was evaluated using field soil, both in growth chamber. Burning of boneseed reduced total phenolics in ashes of boneseed organs by 99% and 100% both at high and low temperatures. The four phenolic compounds that were detected in boneseed were either absent or at negligible levels in the ashes,with inversely related to temperature. Both boneseed ash extracts and litter ash-mediated soil significantly reduced phytotoxicity displaying increased germination, biometric and biochemical parameters of test species compared with unburnt powder extracts and litter powder-mediated soil respectively, with greater reduction of phytotoxicity found for ashes produced at the lower temperature. Interestingly, the ash extracts and litter ash-mediated soil were found to stimulate some of those parameters of the test species compared to control. There was no excessive reactive oxygen species（ROS） produced in test species exposed to ash extracts compared with unburnt powder extracts. These findings suggest that burning of boneseed is an appropriate method of weed control and that this approach will reduce phytotoxicity of this species on native plants.

关键词： Boneseed Burning Phenolic compounds HPLC Phytotoxicity ROS

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The effects of temperature on decomposition and allelopathic phytotoxicity of boneseed litter

引用

Journal of Environmental Sciences 2015年第7期27卷 1-11页

作者： Md.Abdullah Yousuf Al Harun joshua Johnson Md.Nazim Uddin Randall W.robinson Institute for Sustainability and Innovation College of Engineering and Science Victoria UniversityMelbourne

Decomposition of plant litter is a fundamental process in ecosystem function, carbon and nutrient cycling and, by extension, climate change. This study aimed to investigate the role of temperature on the decomposition of water soluble phenolics（WSP）, carbon and soil nutrients in conjunction with the phytotoxicity dynamics of Chrysanthemoides monilifera subsp. monilifera（boneseed） litter. Treatments consisted of three factors including decomposition materials（litter alone, litter with soil and soil alone）, decomposition periods and temperatures（5-15, 15-25and 25-35°C（night/day））. Leachates were collected on 0, 5, 10, 20, 40 and 60 th days to analyse physico-chemical parameters and phytotoxicity. Water soluble phenolics and dissolved organic carbon（DOC） increased with increasing temperature while nutrients like SO-24 and NO-13 decreased. Speed of germination, hypocotyl and radical length and weight of Lactuca sativa exposed to leachates were decreased with increasing decomposition temperature. All treatment components had significant effects on these parameters. There had a strong correlation between DOC and WSP, and WSP content of the leachates with radical length of test species. This study identified complex interactivity among temperature, WSP, DOC and soil nutrient dynamics of litter occupied soil and that these factors work together to influence phytotoxicity.

关键词： Temperature Boneseed Phenolics DOC Nutrient cycling Phytotoxicity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Nano-Graphene Oxide for Cellular Imaging and Drug Delivery

引用

Nano Research 2008年第3期1卷 203-212页

作者： Xiaoming Sun Zhuang Liu Kevin Welsher joshua Tucker robinson Andrew Goodwin Sasa Zaric Hongjie Dai Department of Chemistry and Laboratory for Advanced Materials Stanford UniversityStanfordCA 94305USA

Two-dimensional graphene offers interesting electronic,thermal,and mechanical properties that are currently being explored for advanced electronics,membranes,and *** we synthesize and explore the biological applications of nano-graphene oxide(NGO),i.e.,single-layer graphene oxide sheets down to a few nanometers in lateral *** develop functionalization chemistry in order to impart solubility and compatibility of NGO in biological *** obtain size separated pegylated NGO sheets that are soluble in buffers and serum without *** NGO sheets are found to be photoluminescent in the visible and infrared *** intrinsic photoluminescence(PL)of NGO is used for live cell imaging in the near-infrared(NIR)with little *** found that simple physisorption viaπ-stacking can be used for loading doxorubicin,a widely used cancer drug onto NGO functionalized with antibody for selective killing of cancer cells in *** to its small size,intrinsic optical properties,large specifi c surface area,low cost,and useful non-covalent interactions with aromatic drug molecules,NGO is a promising new material for biological and medical applications.

关键词： Graphene oxide pegylation size separation cellular imaging drug delivery

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

High Performance In Vivo Near-IR (>1 μm) Imaging and Photothermal Cancer Therapy with Carbon Nanotubes

引用

Nano Research 2010年第11期3卷 779-793页

作者： joshua T.robinson Kevin Welsher Scott M.Tabakman Sarah P.Sherlock Hailiang Wang Richard Luong Hongjie Dai Department of Chemistry Stanford UniversityStanfordCA 94305USA Department of Comparative Medicine Stanford University School of MedicineStanfordCA 94305USA

Short single-walled carbon nanotubes(SWNTs)functionalized by PEGylated phospholipids are biologically non-toxic and long-circulating nanomaterials with intrinsic near infrared photoluminescence(NIR PL),characteristic Raman spectra,and strong optical absorbance in the near infrared(NIR).This work demonstrates the first dual application of intravenously injected SWNTs as photoluminescent agents for in vivo tumor imaging in the 1.0-1.4μm emission region and as NIR absorbers and heaters at 808 nm for photothermal tumor elimination at the lowest injected dose(70μg of SWNT/mouse,equivalent to 3.6 mg/kg)and laser irradiation power(0.6 W/cm2)reported to *** vivo resonance Raman imaging revealed the SWNT distribution within tumors at a high spatial *** tumor elimination was achieved for large numbers of photothermally treated mice without any toxic side effects after more than six months ***,side-by-side experiments were carried out to compare the performance of SWNTs and gold nanorods(AuNRs)at an injected dose of 700μg of AuNR/mouse(equivalent to 35 mg/kg)in NIR photothermal ablation of tumors in *** effective tumor elimination with SWNTs was achieved at 10 times lower injected doses and lower irradiation powers than for *** results suggest there are significant benefits of utilizing the intrinsic properties of biocompatible SWNTs for combined cancer imaging and therapy.

关键词： Photothermal cancer SWNT imaging treatment

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Routine prenatal ultrasonography: The pregnant woman’s expectations and perspectives on safety in a Central African obstetric population

引用

Open Journal of Obstetrics and Gynecology 2013年第7期3卷 573-576页

作者： joshua Tambe Boniface Moifo Odile Fernande Zeh Pascal Foumane Joseph Gonsu Fotsin robinson Enow Mbu Obstetrics and Gynecology Department Faculty of Medicine and Biomedical Sciences The University of Yaounde 1 Yaounde Cameroon Obstetrics and Gynecology Department Gyneco-Obstetric and Pediatric Hospital Yaounde Cameroon Radiology Department Gyneco-Obstetric and Pediatric Hospital Yaounde Cameroon

Background: Pregnant women are important stakeholders regarding prenatal ultrasound (US) scanning. Their specific needs and preferences have to be ascertained by healthcare providers to ameliorate service delivery. Objective: To assess the pregnant woman’s expectations during routine prenatal US scan and her perspective ofUSsafety during pregnancy in a Central African obstetric population. Methods: A cross-sectional descriptive survey of consenting pregnant women who reported for routine prenatal US scan using an anonymous questionnaire. A convenient sample of 200 participants was adopted. Results: Thirty-three (16.8%) respondents (on a total of 196) declared they had never done anUSscan. One hundred and eleven (58.4%) on a total of 190 stated that they had not received any information on what ultrasonography is all about. Before theUSscan the respondents would like to receive information on the aim or purpose of ultrasonography, possible inconveniences or risks, and on how to prepare before the scan. The most reported expectations were assurance of the wellbeing of the fetus (58%), gender determination (44.5%) and information on fetal position (20.5%). Thirty-four respondents considered ultrasonography as not perfectly safe for the mother or the “baby”, with the relevant reasons being the use or production of some potentially harmful “rays”. Conclusion: Pregnant women would want to be assured of the wellbeing of the fetus, the gender and position during routine prenatal US. They however need to be informed of its purpose and safety.

关键词： Routine Prenatal US Expectations US Safety

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Connecting supplier and DoD blockchains for transparent part tracking

引用

Blockchain(Research and Applications) 2021年第3期2卷 17-30页

作者： Francis Asuncion Adam Brinckman Dwayne Cole Jeffrey Curtis Matt Davis Timothy Dunlevy Calvin Farmer Andrew Harrison Daniel P.Johnson joshua Joyce Chris Klubertanz Jonathan Lane John Martin Jarek Nabrzyski Joel Neidig Deysi Olivares Gregory robinson Gabriel Rodriguez Chris Root Karen Rowand Al Salour Jeff Score David Scott Ian Taylor Chandler Thompson Huy Truong Xiqun Wang Dale Warren NAVAIR USA SIMBA Chain PlymouthIN46563USA Center for Research Computing University of Notre DameNotre DameIN46556USA Indiana Technology and Manufacturing Companies(ITAMCO) PlymouthIN46563USA Boeing Company USA Naval Systems Inc.USA

Blockchains have been around for more than ten years,and since 2015,a plethora of systems have been launched to target more flexible use *** recently,several enterprise blockchain systems,such as Consensys Quorum and Hyperledger Fabric,have been launched to make blockchain simpler to apply in complex organizational *** this paper,we identify a specific Department of Defense use case,extrapolate requirements,and perform a thorough assessment of the different layers of the blockchain stack to identify the existing state of the art and undertake a gap analysis of the technology for this *** describe a platform that meets many of these challenges and show how we architected,designed,and implemented a solution for this use case for deployment at *** solution connects transactions from two separate blockchain systems,Consensys Quorum and Hyperledger Fabric,by using a graph-based approach that preserves privacy while enabling full transparency across the military and supplier networks.

关键词： Blockchain Smart contracts Supply chain Department of defense(DoD) GraphQL Enterprise blockchain systems

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

痴呆:评估、管理和支持:NICE指南更新概要

引用

英国医学杂志中文版 2019年第5期22卷 283-289页

作者： joshua Pink John O Brien Louise robinson Damien Longson 毛晨晖(译) National Institute for Health and Care Excellence Manchester M1 4BTUK Department of Psychiatry University of CambridgeCambridge Biomedical CampusCambridge CB2 OSPUK Newcastle University Institute for Ageing and Institute for Health & Society Newcastle UniversityNewcastle Biomedical Research BuildingCampus for Ageing and VitalityNewcastle upon Tyne NE4 5PLUK Greater Manchester Mental Health Foundation Trust Bury New RoadPrestwichManchester M25 3BLUK 北京协和医院神经科

痴呆是指一系列的认知、行为和精神症状,包括记忆减退、推理和交流能力障碍,以及人格改变等,并导致了个人的日常生活能力下降。2013年阿尔茨海默病协会公布的报告显示,在英国,有815 000名痴呆患者(相当于65岁以上人群的患病率为1/14),... 详细信息

痴呆是指一系列的认知、行为和精神症状,包括记忆减退、推理和交流能力障碍,以及人格改变等,并导致了个人的日常生活能力下降。2013年阿尔茨海默病协会公布的报告显示,在英国,有815 000名痴呆患者(相当于65岁以上人群的患病率为1/14),并且这个数字预计到2025年,将增加到1 143 000人。

关键词：痴呆指南管理日常生活能力阿尔茨海默病精神症状记忆减退交流能力

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Challenges of liver cancer:Future emerging tools in imaging and urinary biomarkers

引用

World Journal of Hepatology 2015年第26期7卷 2664-2675页

作者： Francesca M Trovato joshua M Tognarelli Mary ME Crossey Daniela Catalano Simon D Taylor-robinson Guglielmo M Trovato Dipartimento di Medicina Clinica e Sperimentale Scuola di Medicina Università di Catania Department of Medicine Imperial College London St Mary’s Campus

Chronic liver disease has become a global health problem as a result of the increasing incidence of viral hepatitis, obesity and alcohol misuse. Over the past three decades, in the United Kingdom alone, deaths from chronic liver disease have increased both in men and in women. Currently, 2.5% of deaths worldwide are attributed to liver disease and projected figures suggest a doubling in hospitalisation and associated mortality by 2020. Chronic liver diseases vary for clinical manifestations and natural history, with some individuals having relatively indolent disease and others with a rapidly progressive course. About 30% of patients affected by hepatitis C has a progressive disease and develop cirrhosis over a 20 years period from the infection, usually 5-10 years after initial medical presentation. The aim of the current therapeutic strategies is preventing the progression from hepatitis to fibrosis and subsequently, cirrhosis. Hepatic steatosis is a risk factor for chronic liver disease and is affecting about the half of patients who abuse alcohol. Moreover non-alcoholic fatty liver disease is part of the metabolic syndrome, associated with obesity, hypertension, type Ⅱ diabetes mellitus and dyslipidaemia, and a subgroup of patients develops non-alcoholic steatohepatitis and fibrosis with subsequent cirrhosis. The strengths and pitfalls of liver biopsy are discussed and a variety of new techniques to assess liver damage from transient elastography to experimental techniques, such as in vitro urinary nuclear magnetic resonance spectroscopy. Some of the techniques and tests described are already suitable for more widespread clinical application, as is the case with ultrasound-based liver diagnostics, but others, such as urinary metabonomics, requires a period of critical evaluation or development to take them from the research arena to clinical practice.

关键词： Virus hepatitis Liver cancer Ultrasound Fibrosis U

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：