检索结果-南通市图书馆

Current concepts of laparoscopic splenectomy in elective patients

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

World Journal of Surgical Procedures 2014年第2期4卷 33-47页

作者： Marco Casaccia Cesare Stabilini Ezio Gianetta Adalberto Ibatici Gregorio Santori UOC Clinica Chirurgica 2 IRCCS Azienda Ospedaliera Universitaria San Martino-ISTMonoblocco XI piano-Largo Rosanna Benzi10-16132 GenovaItaly Surgical Clinic Unit II IRCCS San Martino University Hospital-National Institute for Cancer Research10-16132 GenoaItaly Division of Hematology 1 IRCCS San Martino University Hospital-National Institute for Cancer Research10-16132 GenoaItaly Department of Surgical Sciences and Integrated Diagnostics University of Genoa10-16132 GenoaItaly

Formerly,open splenectomy represented the conventional surgical treatment for many hematologic ***,thanks to permanent technical development and improved skills,also laparoscopic splenectomy(LS) has become a recognized procedure in the treatment of spleen diseases,even in case of splenomegaly.A systematic review was performed with the aim of recalling the proved concepts of this surgical treatment and to browse new devices and techniques and their impact on the surgical *** literature search was initially conducted in Pub Med by entering general queries related to *** record identified through Pub Med searching(n = 1599) wasthen screened by applying several criteria(study published in English from 1991 to 2013 with abstract available,by excluding systematic/non-systematic reviews,meta-analysis,practice guidelines,case reports,and study involving animals).The articles assessed for eligibility(n = 160) were primarily evaluated by excluding studies that did not report operative time and conversion to open *** articles that treated multiport LS we included only clinical trials with patients > *** studies included in qualitative synthesis were *** search strategy carried out in Pub Med does not allow to obtain an overview of the items returned by the main *** this aim we replicated the search in the Web of Science TM database,only including the studies published in English in the period 1991-2013 with no other filter/selection *** full records(n = 1141) and cited references returned by Web of Science TM were analyzed with the visualization of similarities(VOS) mapping *** of title/abstract text corpus and bibliographic coupling of authors obtained by applying the VOS approach were *** in normal-size or moderately enlarged spleens the laparoscopic approach is unquestionable,in massive splenomegaly the optimal technique remain to be *** this setting,prospective randomized trials to comp

关键词： Spleen Splenectomy Laparoscopy Minimally Invasive Splenic Diseases Splenic Neoplasms Visualization of similarities mapping

Spectral broadening for multi-Joule pulse compression in the APOLLON Long Focal Area facility

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 Power Laser Science and Engineering 2022年第2期10卷 7-13页

作者： P.-G.Bleotu J.Wheeler D.Papadopoulos M.Chabanis J.Prudent M.Frotin L.Martin N.Lebas A.Freneaux A.Beluze F.Mathieu P.Audebert D.Ursescu J.Fuchs G.Mourou LULI-CNRS CEASorbonne UniversiteEcole PolytechniqueInstitut Polytechnique de ParisF-91128 Palaiseau CedexFrance Faculty of Physics University of Bucharest077125 Bucharest-MagureleRomania Horia Hulubei National institute for R&D in Physics and Nuclear Engineering(IFIN-HH) MagureleRO-077125Romania Independent Researcher F-92340 Bourg-La-ReineFrance IZEST Ecole PolytechniqueInstitut Polytechnique de ParisF-91128 Palaiseau CedexFrance

Spectral-broadening of the APOLLON PW-class laser pulses using a thin-film compression technique within the longfocal-area interaction chamber of the APOLLON laser facility is reported,demonstrating the delivery of the full energy pulse to the target interaction *** laser pulse at 7 J passing through large aperture,thin glass wafers is spectrally broadened to a bandwidth that is compatible with a 15-fs pulse,indicating also the possibility to achieve sub-10-fs pulses using 14 *** the post-compressor near the interaction makes for an economical method to produce the shortest pulses by limiting the need for high damage,broadband optics close to the final target rather than throughout the entire laser transport system.

关键词： high energy post-compression nonlinear pulse interaction high-power laser laser diagnostics

Realizing Attosecond Core-Level X-ray Spectroscopy for the Investigation of Condensed Matter Systems

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

Ultrafast Science 2023年第4期3卷 1-13页

作者： Adam M.Summers Stefano Severino Maurizio Reduzzi Themistoklis P.H.Sidiropoulos Daniel E.Rivas Nicola Di Palo Hung-Wei Sun Ying-Hao Chien Iker Leon Barbara Buades Seth L.Cousin Stephan M.Teichmann Tobias Mey Klaus Mann Barbara Keitel Elke Plonjes Dmitri K.Efetov Heinrich Schwoerere Jens Biegert ICFO-Institut de Ciencies Fotoniques The Barcelona Institute of Science and Technology08860 CastelldefelsBarcelonaSpain Linac Coherent Light Source SLAC National Accelerator LaboratoryMenlo ParkCA 94025USA European XFEL Holzkoppel 422869 SchenefeldGermany Institut für Nanophotonik Göttingen e.V. Hans-Adolf-Krebs-Weg 137077 GöttingenGermany Deutsches Elektronen-Synchrotron Notkestraße 8522607 HamburgGermany Max-Planck-Institut für Struktur und Dynamik der Materie 22761 HamburgGermany ICREA Pg.Lluís Companys 2308010 BarcelonaSpain

Unraveling the exact nature of nonequilibrium and correlated interactions is paramount for continued progress in many areas of condensed matter science. Such insight is a prerequisite to develop an engineered approach for smart materials with targeted properties designed to address standing needs such as efficient light harvesting, energy storage, or information processing. For this goal, it is critical to unravel the dynamics of the energy conversion processes between carriers in the earliest time scales of the excitation dynamics. We discuss the implementation and benefits of attosecond soft x-ray core-level spectroscopy up to photon energies of 600 eV for measurements in solid-state systems. In particular, we examine how the pairing between coherent spectral coverage and temporal resolution provides a powerful new insight into the quantum dynamic interactions that determine the macroscopic electronic and optical response. We highlight the different building blocks of the methodology and point out the important aspects for its application from condensed matter studies to materials as thin as 25 nm. Furthermore, we discuss the technological developments in the field of tabletop attosecond soft x-ray sources with time-resolved measurements at the near and extended edge simultaneously and investigate the exciting prospective of extending such technique to the study of 2-dimensional materials.

关键词： Attosecond Science Core-level x-ray Spectroscopy High Harmonic Generation X-ray Absorption Ultrafast solid-state dynamics

photosensitizing Effect of Porphyrin films as Organic photodetector

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

材料科学与工程（中英文版） 2010年第8期4卷 40-44页

作者： Agus Supriyanto Kus Kusminarto Kuwat Tnyana Roto Roto Muhamad Mat Salleh al Akrajas Ali Umar Department of Physics Sebelas Maret University Surakarta 57126 Indonesia Department of Physics Gadjah Mada University Yogyakarta 55281 Indonesia Department of Chemistry Gadjah Mada University Yogyakarta 55281 Indonesia institute of Microengineering and Nanoelectronics （IMEN） Universiti Kebangsaan Malaysia （UKM） Bangi 43600 Selangor Malaysia

A set of organic photodetector devices arranged as indium doped tin oxide (ITO)/porphyrin/TiO2/aluminum has been fabricated and its performance has been tested in dark and under various illumination of visible light intensity from 20-100 mW/cm2. Four devices were prepared using natural porphyrin by 1, 3, 5 and 7 times of spin coating. First, porphyrin film was deposited onto indium doped tin oxide (ITO)-covered glass substrate by spin coating technique. Second, titanium dioxide (TiO2) film was deposited on top of the porphyrin film using similar technique. Porphyrin was isolated from spirulina microalgae and TiO2 nanoparticle was prepared by controlled hydrolysis technique using titanium(IV) etoxide, Ti(OC2H5)4, and potassium chloride. The films were characterized by UV-vis spectrophotometer to investigate their absorption spectra. The porphyrin film has maximum absorbance at 660 nm, which is in the red region. Then, an aluminum electrode was prepared on top of TiO2 film by electron beam evaporation technique. The resulting device shows rectification property in dark and shows photosensitizing effect under illumination. The device prepared by 3 times of spin coating of porphyrin films shows the highest current density, Jsc, of 5.76 μA/cm2 and open circuit potential, Voc, of 648 mV, respectively.

关键词：光电探测器有机薄膜光敏作用卟啉 TiO2纳米粒子紫外可见分光光度计挥发性有机化合物铟锡氧化物

thin films Fabricated by Pulsed Laser Deposition for Electrocatalysis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Renewables 2023年第1期1卷 21-38页

作者： Hainan Sun Hyunseung Kim Xiaomin Xu Liangshuang Fei WooChul Jung Zongping Shao Department of Materials Science and Engineering Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141 WA School of Mines:Minerals Energy and Chemical Engineering(WASM-MECE)Curtin UniversityPerthWestern Australia 6845 State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816

Advances in energy conversion and storage technologies,such as water electrolyzers,rechargeable metal-air batteries,and fuel cells,have enabled a renewable and sustainable *** efficiency and effectiveness of these technologies largely relies on the physicochemical properties of the functional materials used,specifically *** laser deposition(PLD)is a powerful technique for the synthesis of thin film materials,offering a unique platform for understanding electrochemical reaction mechanisms and searching for low-cost and high-performance *** this mini-review,we present the latest studies in which thin film materials(mainly focused on perovskite oxide thin films)via PLD have been actively utilized in the field of *** fundamentals and advantages of PLD in the synthesis of thin films are discussed ***,emerging types of thin films associated with electrochemical applications are *** emphasis is placed on material design methods to reveal the reaction mechanisms and establish the structure–performance relationships by understanding structural variations in precatalysts and surface reconstruction under reaction ***,we discuss remaining challenges and future perspectives.

关键词： pulsed laser deposition thin film materials electrocatalysis reaction mechanism

Endoscopic submucosal dissection in early gastric cancer in elderly patients and comorbid conditions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Endoscopy 2015年第5期7卷 524-531页

作者： Tsutomu Nishida Motohiko Kato Toshiyuki Yoshio Tomofumi Akasaka Teppei Yoshioka Tomoki Michida Masashi Yamamoto Shiro Hayashi Yoshito Hayashi Masahiko Tsujii Tetsuo Takehara Department of Gastroenterology Toyonaka Municipal Hospital Department of Gastroenterology National Hospital Organization Tokyo Medical Center Division of Gastroenterology Cancer Institute HospitalTokyo Department of Gastrointestinal Oncology Osaka Medical Center for Cancer and Cardiovascular Diseases Department of Gastroenterology and Hepatology Osaka University of Graduate School of Medicine Department of Gastroenterology Teikyo University Medical Center

The prognosis of early gastric cancer(EGC) is good if there is no concomitant lymph node metastasis. Therefore, the early detection of EGC is important to improve the prognosis of patients with gastric cancer. In Japan, 40% to 50% of all gastric cancers are EGC, and endoscopic submucosal dissection(ESD) is widely accepted as a local treatment for these lesions, particularly for large lesions that at one time were an indication for gastrectomy because of the difficulty of en-bloc resection. Consequently, this procedure can preserve the entire stomach and the patient's postoperative quality of life. ESD has become a general technique with improved procedures and devices, and has become the preferred treatment for EGC rather than gastrectomy. Therefore, ESD may demonstrate many advantages in patients who have several comorbidities, particularly elderly population, patients taking antithrombotic agents, or patients with chronic kidney disease, or liver cirrhosis. However, it is not yet clear whether patients with both EGC and comorbidities are feasible candidates for ESD and whether they would consequently be able to achieve a survival benefit after ESD. In this review, we discuss the clinical problems of ESD in patients with EGC and those comorbid conditions.

关键词： Endoscopic submucosal dissection Gastriccancer Elderly person Antithrombotic agents Livercirrhosis Chronic kidney disease

Convection Heat Transfer from Heated thin Cylinders Inside a Ventilated Enclosure

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Semiconductor Science and Information devices 2022年第2期4卷 10-16页

作者： Ali Riaz Adnan Ibrahim Muhammad Sohail Bashir Muhammad Abdullah Ajmal Shah Abdul Quddus Department of Mechanical Engineering Pakistan Institute of Engineering and Applied SciencesIslamabad45650Pakistan School of Engineering Science University of Science and Technology of ChinaHefeiAnhui230027China Hefei National Laboratory for Physical Sciences at the Microscale CAS Key Laboratory of Soft Matter ChemistryDepartment of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefeiAnhui230026China

Experimental study was conducted to determine the effect of velocity of axial fan,outlet vent height,position,area,and aspect ratio(h/w)of ventilated enclosure on convection heat *** wooden ventilated enclosure having top and front transparent wall was made up of Perspex for visualization,and internal physical dimensions of box were 200 mm×200 mm×400 *** vent was at bottom while outlet vents were at the side and top *** heated cylindrical heat source having 6.1 slenderness ratio was fabricated and hanged at the centre of the *** calculate heat transfer rates,thermocouples were attached to the inner surface of heat source with silica *** source was operated at constant heat flux in order to quantify the effect of velocity of air on heat *** was observed that average Nusselt number was increased from 68 to 216 by changing velocity from 0 to 3.34 m/s at constant modified Grashof number i.e.5.67E+*** variation in outlet height at the front wall did not affect heat transfer in forced convection ***,Nusselt number decreased to 5%by changing the outlet position from top to the front wall or by 50%reduction in outlet area during forced *** rise in temperature of enclosure increased from 8.19 K to 9.40 K by increasing aspect ratio of enclosure from 1.5 to 2 by operating heat source at constant heat flux i.e.541.20 w/m^(2).

关键词： Experimentation Ventilated enclosures Convection heat transfer Dimensionless data

Experimentation on Optimal Configuration and Size of thin Cylinders in Natural Convection

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Semiconductor Science and Information devices 2022年第2期4卷 17-28页

作者： Ali Riaz Adnan Ibrahim Muhammad Sohail Bashir Masroor Asghar Muhammad Abdullah Ajmal Shah Department of Mechanical Engineering Pakistan Institute of Engineering and Applied SciencesIslamabad45650Pakistan School of Engineering Science University of Science and Technology of ChinaHefei230027China Hefei National Laboratory for Physical Sciences at the Microscale CAS Key Laboratory of Soft Matter ChemistryDepartment of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefeiAnhui230026China Department of Information Technology University of Southern QueenslandToowoomba4350QueenslandAustralia

In this paper,an experimental study of laminar,steady state natural convection heat transfer from heated thin cylinders in an infinite air medium has been *** electrically heated cylinders having the same slenderness ratio(L/D)i.e.6.1 but different diameters i.e.3.8 cm and 5.08 cm were used.105 experiments were carried out to study the effect of diameter and inclination angle of thin cylinder on natural convection heat *** mandatory corrections of radiation and endcap heat losses,convective heat transfer results were presented in the form of local and average dimensionless *** vertical configuration of thin cylinder,Nusselt number was varied from 52.99 to 95.10 corresponding to 1.28×10^(8)≤Ra*L≤1.08×10^(10).While for horizontal configuration,Nusselt number was varied from 10.74 to 17.78 corresponding to 9.42×10^(4)≤Ra*D≤8.17×10^(6).Results were compared with the published data and found satisfactory as the maximum percentage difference was only 3.09%.The essence of research is that the heat transfer coefficient increases with decrease in diameter and increase in inclination *** flow visualization was done to capture patterns of fluid ***,comparison was made to quantify increase in Nusselt number from slender cylinder as compared to the flat plate.

关键词： Natural convection thin cylinders Flat plate Nusselt number

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

有机太阳电池关键材料研究进展

中国科学：化学 2020年第6期50卷 437-446页

作者：童杨肖作杜晓艳左传天李跃龙吕梦岚袁永波易陈谊郝锋华雍雷霆林乾乾孙宽赵德威段春晖邵向锋李伟叶轩立肖正国张斌边庆真程远航刘升建程明靳志文杨上峰丁黎明科技部高技术研究发展中心北京100044 国家纳米科学中心北京100190 Department of Materials Science and Engineering Friedrich-Alexander-Universitat Erlangen-NiimbergMartensstrasse 791058 ErlangenGermany CSIRO Manufacturing Bag 10Clayton SouthVictoria 3169Australia 南开大学光电子薄膜器件与技术研究所天津300350 贵州理工学院化学工程学院贵阳550003 中南大学物理与电子学院长沙410083 清华大学电机工程与应用电子技术系北京100084 电子科技大学材料与能源学院成都610054 云南大学材料科学与工程学院昆明650000 北京大学材料科学与工程系北京100871 武汉大学物理科学与技术学院武汉430072 重庆大学能源与动力工程学院重庆400044 四川大学材料科学与工程学院成都610065 华南理工大学发光材料与器件国家重点实验室广州510640 兰州大学功能有机分子化学国家重点实验室兰州730000 Department of Physics Swansea UniversitySingleton ParkSwansea SA28PPUnited Kingdom 中国科学技术大学物理系合肥230026 常州大学材料科学与工程学院常州213164 Department of Physics Chemistry and BiologyLinkoping UniversityLinkoping 58183Sweden Solar Energy Research institute of Singapore National University of Singapore117574Singapore 华南师范大学化学学院广州510006 江苏大学能源研究院镇江212013 兰州大学物理科学与技术学院兰州730000 中国科学技术大学材料科学与工程系合肥230026

有机太阳电池具有质量轻、柔性、印刷制备等优点,有巨大的应用潜力,从其诞生那一刻起便引起了学术界和工业界的广泛研究兴趣.历经25年的发展,有机太阳电池效率已突破18%,其快速进步得益于不断涌现的高性能新材料和器件制备技术,以及对... 详细信息

有机太阳电池具有质量轻、柔性、印刷制备等优点,有巨大的应用潜力,从其诞生那一刻起便引起了学术界和工业界的广泛研究兴趣.历经25年的发展,有机太阳电池效率已突破18%,其快速进步得益于不断涌现的高性能新材料和器件制备技术,以及对电池活性层形貌、分子堆积和器件机理的深入理解.基于有机共轭结构的电子给体和电子受体材料是决定有机太阳电池性能的关键材料.本文将以给、受体材料的发展历程为主线,聚焦那些明星材料和里程碑工作,阐述高性能关键材料的分子结构演变和进化过程,最后展望其面临的挑战和未来发展方向.

关键词：有机太阳电池关键材料 D-A共聚物给体富勒烯受体非富勒烯受体