检索结果-南通市图书馆

Endoscopic techniques for the di.gnosis of pancreatic cystic lesions

World Journal of Gastroenterology 2025年第1期31卷 1-7页

作者： Sahib Singh Saurabh Chandan Rakesh Vinayek Jahnvi dhar Jayanta Samanta Gabriele Capurso Ivo Boskoski Cristiano Spada Jorge d Machicado Stefano Francesco Crinò Antonio Facciorusso department of Internal Medi.ine Sinai HospitalBaltimoreMD 21215United States di.ision of Gastroenterology and Hepatology Creighton University School of MedicineOmahaNE 68131United States department of Gastroenterology Sinai Hospital of BaltimoreBaltimoreMD 21215United States department of Gastroenterology Postgraduate Institute of Medical Education and ResearchChandigarh 160012India di.ision of Pancreato-Biliary Endoscopy and Endosonography Pancreas Translational and Clinical Research CenterIRCCS San Raffaele Scientific InstituteVita-Salute San Raffaele UniversityMilano 20132Italy di.estive Endoscopy Unit Fondazione Policlinico Universitario Agostino Gemelli IRCSSUniversitàCattolica del Sacro Cuore di RomaCenter for Endoscopic Research Therapeutics and TrainingRoma 00168Italy department of Gastroenterology and Endoscopy Catholic UniversityRoma 00168Italy department of Gastroenterology University of Michigan HealthAnn ArborMI 48107United States department of Endoscopy University of VeronaVerona 37121VenetoItaly Gastroenterology Unit Department of Medical and Surgical SciencesUniversity of FoggiaFoggia 71122Italy

Pancreatic cysts are mostly incidental findi.gs on computed tomography or magnetic resonance imaging scans,with few patients presenting with abdominal pain or other *** accurate di.gnosis of cysts is important as management depends on the type(neoplastic or non-neoplastic).Cross-sectional imaging is fast being replaced with endoscopic ultrasound(EUS)and various techniques based on that such as EUS-guided fine needle aspiration,EUS-guided needle confocal laser endomicroscopy,EUS-through-the-needle biopsy,and contrast-enhanced *** studi.s have reported varying di.gnostic and adverse event rates with these *** addi.ion,American,European,and Kyoto guidelines for the di.gnosis and management of pancreatic cysts have provided di.ferent *** this edi.orial,we elaborate on the clinical guidelines,recent studi.s,and comparison of di.ferent endoscopic methods for the di.gnosis of pancreatic cysts.

关键词： Endoscopic ultrasound Fine needle aspiration Needle confocal laser endomicroscopy Through-the-needle biopsy Contrast-enhanced endoscopic ultrasound

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

Gold（Ⅰ）-Catalyzed di.stereo- and Enantioselective Synthesis of Polysubstituted Pyrrolo[3,4-d][1,2 ]oxazines

引用

Chinese Journal of Chemistry 2018年第6期36卷 519-525页

作者： MeiZhang Xiaoyu di.Mingrui Zhang Junliang Zhang Shanghai Key Laboratory of Green Chemistry and Chemical Processes Department of Chemistry East China Normal University 3663 N Zhongshan Road Shanghai 200062 China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China

A gold（I）-catalyzed highly di.stereo- and enantioselective intermolecular cycloaddi.ion of oxime ethers with nitrones under mild condi.ions was developed, which provides an facile access to optically pure highly substituted pyrrolo[3,4-d][1,2]oxazines. The salient features of this reaction in- clude general substrate scope, high efficiency, high enantioselectivity, readi.y available starting materials, and the use of commercially available ligand.

关键词： gold(Ⅰ)-catalysis heterobicyclic pyrroles oxime ethers nitrones tandem reaction

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

Fluorescence image-guided lymphadenectomy using indocyanine green and near infrared technology in robotic gastrectomy

引用

Chinese Journal of Cancer Research 2018年第5期30卷 568-570页

作者： Jacopo desiderio Stefano Trastulli AlessANdro Gemini domenico di.Nardo Giorgio Palazzini Amilcare Parisi Vito d'ANdrea department of di.estive Surgery St.Mary's HospitalTerni department of Surgical Sciences "La Sapienza" University of Rome

In recent years, some researchers have tried to find a way to improve the surgical identification of the lymphatic drainage routes and lymph node stations during radi.al gastrectomy, thus starting a new research frontier in this field called ＂navigation surgery＂. Among the di.ferent reported solutions, the introduction of the indocyanine green （ICG） has drawn attention for its characteristics, a fluorescence dye that can be detected in the near infrared spectral band （NIR）. A fluorescence imaging technology has been integrated in the latest version of the da Vinci robotic system and surgeons have extensively reported their experiences in colorectal and hepato-biliary surgery for tumors, vascular and lymphatic structures visualization. However, up to date, the combined use of fluorescence imaging and robotic technology has not been adequately investigated during lymphadenectomy in gastric cancer.

关键词： Gastric cancer fluorescence guided surgery robotic surgery

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

First-principles search of hot superconductivity in La-X-H ternary hydrides

引用

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

作者： Simone di.Cataldo Wolfgang von der Linden Lilia Boeri Institute of Theoretical and Computational Physics Graz University of TechnologyNAWI Graz8010GrazAustria di.artimento di.Fisica Sapienza Universitàdi Roma00185RomaItaly Centro Ricerche Enrico Fermi Via Panisperna89a00184RomaItaly

Motivated by the recent claim of hot superconductivity with critical temperatures up to 550 K in La + x hydrides,we investigate the high-pressure phase di.gram of compounds that may have formed in the experiment,using first-principles calculations for evolutionary crystal structure predi.tion and *** from the hypothesis that the observed T_(c) may be realized by successive heating upon a pre-formed LaH_(10) phase,we examine plausible ternaries of lanthanum,hydrogen and other elements present in the di.mond anvil cell: boron,nitrogen,carbon,platinum,gallium,*** find that only boron and,to a lesser extent,gallium form metastable superhydride-like structures that can host high-T_(c) superconductivity,but the predi.ted T_(c)’s are incompatible with the experimental *** results indi.ate that,while the claims of hot superconductivity should be reconsidered,it is very likely that unknown H-rich ternary or multinary phases containing lanthanum,hydrogen,and possibly boron or gallium may have formed under the reported experimental condi.ions,and that these may exhibit superconducting properties comparable,or even superior,to those of currently known hydrides.

关键词： hydrides boron superconductivity

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

Effect of simulated thermomechanical processing on transformation behavior and microstructure of 82B steel

引用

Journal of Iron and Steel Research International 2019年第1期26卷 69-77页

作者： He Wei Yin-li Chen Lan Su di.Tang Collaborative Innovation Cemer of Steel Technology University of Science and Technology BeijingBeijing 100083China Beijing Laboratory of Metallic Materials and Processing for Modern Transportation Beijing 100083China

The effects of loop-laying temperature and austenite deformation on the phase(ransformation behavior during continuous cooling,microstructure,and pearlite interlaminar spaci ng in 82B steels were *** and dynamic conti nu ous cooling transformation(CCT)di.grams were measured with a Gleeble-3500 thermal simulator,and the mechanisms governing changes in the initial temperature,initial time,and duration of the phase transformation zone were also analyzed and *** results show that CCT di.gram shifted to the bottom right,the initial temperature of the phase transition decreased,the initial time of the phase transition increased,the duration of the phase transition increased,and the lamellar spacing of pearlite was finer as the loop-layi ng temperature in *** initial phase transition time decreased,and the phase transition duration first reduced,then increased,and finally decreased in the static condi.ion and in the dynamic condi.ion at 850℃as the cooling rate ***,the phase transition duration continuously decreased in the dynamic condi.ion at 900℃.At a given loop-laying temperature,the lamellar spacing in pearlite was finer due to austenite deformation compared with the undeformed *** with the results shown in the dynamic CCT di.gram,the correspondi.g phase di.grams of the static CCT di.gram slightly shifted to the bottom ***,there was a clear lin ear relationship between the reciprocal of the lamellar spaci ng in pearlite and the average undercooling degree in the phase transformation zone.

关键词： 82B steel Phase transformation Loop-laying temperature Austenite deformation Microstructure

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

Pedunculated colonic lipoma prolapsing through the anus

引用

World Journal of Clinical Cases 2015年第5期3卷 457-461页

作者： Omar M Ghanem Julia Slater Puneet Singh Richard F Heitmiller Joseph d di.Rocco department of Surgery Medstar Union Memorial Hospital Baltimore MD 21218 United States Saba University School of Medi.ine Devens MA 01434 United States

Colorectal lipomas are the second most common benign tumors of the colon. These masses are typically incidental findi.gs with over 94% being asymptomatic. Symptoms-classically abdominal pain, bleedi.g per rectum and alterations in bowel habits-may arise when lipomas become larger than 2 cm in size. Colonic lipomas are most often noted incidentally by colonoscopy. They may also be identified by abdominal imaging such as computed tomography or magnetic resonance imaging. We report a case of a sixty-one years old male who presented to our emergency room with a 6.7 cm × 6.3 cm soft tissue mucosal mass protrudi.g transanally. The patient was stable with a benign abdominal examination. The mass was initially thought to be a rectal prolapse; however, a limited di.ital rectal exam was able to identify this as di.tinct from the anal canal. Since the mass was irreducible, it was elected to be resected under anesthesia. At surgery, manipulation of the mass identified that the lesion was pedunculated with a long and thickened stalk. A laparoscopic linear cutting stapler was used to resect the mass at its stalk. Pathology showed a polypoid submucosal lipoma of the colon with overlying ulceration and necrosis. We report this case to highlight this rare but possible presentation of colonic lipomas; an incarcerated, trans-anal mass with features suggesting rectal prolapse. Trans-anal resection is simple and effective treatment.

关键词： Colorectal lipoma Rectal prolapse Transanal resection

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

Real-time determination of sandy soil stiffness during vibratory compaction incorporating machine learning method for intelligent compaction

引用

Journal of Rock Mechanics and Geotechnical Engineering 2022年第5期14卷 1609-1625页

作者： Zhengheng Xu Hadi.Khabbaz Behzad Fatahi di.Wu School of Civil and Environmental Engineering University of Technology SydneySydneyAustralia

An emerging real-time ground compaction and quality control, known as intelligent compaction(IC), has been applied for efficiently optimising the full-area compaction. Although IC technology can provide real-time assessment of uniformity of the compacted area, accurate determination of the soil stiffness required for quality control and design remains challenging. In this paper, a novel and advanced numerical model simulating the interaction of vibratory drum and soil beneath is developed. The model is capable of evaluating the nonlinear behaviour of underlying soil subjected to dynamic loadi.g by capturing the variations of damping with the cyclic shear strains and degradation of soil modulus. The interaction of the drum and the soil is simulated via the finite element method to develop a comprehensive dataset capturing the dynamic responses of the drum and the soil. Indeed, more than a thousand three-di.ensional(3d) numerical models covering various soil characteristics, roller weights, vibration amplitudes and frequencies were adopted. The developed dataset is then used to train the inverse solver using an innovative machine learning approach, i.e. the extended support vector regression, to simulate the stiffness of the compacted soil by adopting drum acceleration records. Furthermore, the impacts of the amplitude and frequency of the vibration on the level of underlying soil compaction are *** proposed machine learning approach is promising for real-time extraction of actual soil stiffness during compaction. Results of the study can be employed by practising engineers to interpret roller drum acceleration data to estimate the level of compaction and ground stiffness during compaction.

关键词： Intelligent compaction Machine learning method Finite element modelling Acceleration response

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

Recent advances in hybrid water electrolysis for energy-saving hydrogen production

引用

Green Chemical Engineering 2023年第1期4卷 17-29页

作者： di.Li Jibing Tu Yingying Lu Bing Zhang State Key Laboratory of Chemical Engineering Institute of Pharmaceutical EngineeringCollege of Chemical and Biological EngineeringZhejiang UniversityHangzhou310027China ZJU-Hangzhou Global Scientific and Technological Innovation Center Hangzhou311215China

Electricity-driven water splitting to convert water into hydrogen(H_(2)has been widely regarded as an efficient approach for H_(2)***,the energy conversion efficiency of it is greatly limited due to the di.advantage of the sluggish kinetic of oxidation evolution reaction(OER).To effectively address the issue,a novel concept of hybrid water electrolysis has been developed for energy–saving H_(2)*** strategy aims to replace the sluggish kinetics of OER by utilizing thermodynamically favorable organics oxidation reaction to replace ***,recent advances in such water splitting system for boosting H_(2)evolution under low cell voltage are systematically *** notable progress of di.ferent organics oxidation reactions coupled with hydrogen evolution reaction(HER)are di.cussed in *** facilitate the development of hybrid water electrolysis,the major challenges and perspectives are also proposed.

关键词： Hydrogen evolution reaction Hybrid water electrolysis Electrocatalytic oxidation Organic electro-oxidation High-value products

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

New food sources and production systems:a comparison of international regulations and China’s advancements in novel foods with synthetic biology

引用

Food Science and Human Wellness 2024年第5期13卷 2519-2542页

作者： Xin Liu di.Wu Yi Shao Yongning Wu Key Laboratory for deep Processing of Major Grain and Oil(The Chinese Ministry of Education) College of Food Science and EngineeringWuhan Polytechnic UniversityWuhan 430023China Institute for Global Food Security School of Biological SciencesBelfast B795DLUnited Kingdom NHC Key Laboratory of Food Safety Risk Assessment China National Center for Food Safety Risk AssessmentBeijing 100021China department of Nutrition and Food Safety Peking Union Medical CollegeResearch Unit of Food SafetyChinese Academy of Medical SciencesBeijing 100021China

The global shift towards sustainable food systems has sparked innovations in food sources and production systems,includi.g cell-based meat,plant-based food products,precision fermentation,and 3d food *** advancements pose regulatory challenges and opportunities,with China emerging as a critical player in adopting and regulating new food *** review explores the international landscape of new food sources and production systems(NFPS),focusing on China’s role and regulatory approaches compared to global *** this comparative analysis,we aim to contribute to the ongoing di.logue on food safety regulation,offering insights and recommendations for policymakers,industry stakeholders,and researchers engaged in the global food system’s *** comprehensive overview underscores the dynamic nature of regulatory frameworks governing NFPS,highlighting the international efforts to ensure food safety,consumer protection,and the sustainable evolution of the food industry.

关键词： New food sources Food production system Food safety International regulation Synthetic biology China

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

Marine propellers performance and flow-field predi.tion by a free-wake panel method

引用

Journal of Hydrodynamics 2014年第5期26卷 780-795页

作者： GRECO Luca MUSCARI Roberto TESTA Claudi. di.MASCIO Andrea CNR-INSEAN Italian Ship Model BasinRomeItaly CNR-IAC Istituto per le Applicazioni del Calcolo "M. Picone"RomeItaly

A Boundary Element Method （BEM） hydrodynamics combined with a flow-alignment technique to evaluate blades shed vorticity is presented and applied to a marine propeller in open water. Potentialities and drawbacks of this approach in capturing propeller performance, slipstream velocities, blade pressure di.tribution and pressure di.turbance in the flow-field are highlighted by comparisons with available experiments and RANSE results. In particular, correlations between the shape of the convected vortex- sheet and the accuracy of BEM results are di.cussed throughout the paper. To this aim, the analysis of propeller thrust and torque is the starting point towards a detailed di.cussion on the capability of a 3-d free-wake BEM hydrodynamic approach to describe the local features of the flow-field behind the propeller di.k, in view of applications to propulsive configurations where the shed wake plays a dominant role.

关键词： BEM hydrodynamics free-wake analysis BEM-RANSE comparison

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

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：