检索结果-南通市图书馆

维普期刊数据库

肝细胞腺瘤钆塞酸增强MR成像形态及分子特点

在线全文

学校读者我要写书评

暂无评论

国际医学放射学杂志 2015年第6期 585-586页

作者： A.Ba-Ssalamah C.Antunes D.Feier n.Bastati j.C.Hodge j.Stift 刘丽华 Department of Biomedical Imaging and Image-guided Therapy Medical University of Vienna

摘要目的评价应用钆塞酸增强MR成像特点对鉴别肝细胞腺瘤组织病理学分类不同新免疫表型及基因型亚型的诊断效能,探讨肝胆管期(HBP)强化方式与有机阴离子转运

关键词：肝细胞腺瘤多药耐药相关蛋白成像特点 MR 肝胆管

Therapeutic anticoagulation for splanchnic vein thrombosis in acute pancreatitis: A national survey and case-vignette study

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

World journal of Gastroenterology 2023年第21期29卷 3328-3340页

作者： noor j Sissingh jesse V Groen Hester C Timmerhuis Marc G Besselink Bas Boekestijn Thomas L Bollen Bert A Bonsing Frederikus A Klok Hjalmar C van Santvoort Robert C Verdonk Casper H j van Eijck jeanin E van Hooft jan Sven D Mieog Department of Gastroenterology and Hepatology Leiden University Medical CentreLeiden 2333 ZANetherlands Department of Research and Development St.Antonius HospitalNieuwegein 3420 EMNetherlands Department of Surgery Leiden University Medical CentreLeiden 2333 ZANetherlands Department of Surgery St.Antonius HospitalNieuwegein 3420 EMNetherlands Department of Surgery Amsterdam UMCLocation University of AmsterdamAmsterdam 1081 HZNetherlands Amsterdam Gastroenterology Endocrinology Metabolism Amsterdam 1105 AZNetherlands Department of Radiology Leiden University Medical CentreLeiden 2333 ZANetherlands Department of Radiology St.Antonius HospitalNieuwegein 3420 EMNetherlands Department of Medicine-Thrombosis and Hemostasis Leiden University Medical CentreLeiden 2333 ZANetherlands Department of Surgery University Medical Centre UtrechtUtrechtUtrecht 3584 CXNetherlands Department of Gastroenterology and Hepatology St.Antonius HospitalNieuwegein 3420 EMNetherlands Department of Surgery Erasmus Medical CentreRotterdam 3015 GDNetherlands

BACKGROUnD Splanchnic vein thrombosis(SVT)is a major complication of moderate and severe acute *** is no consensus on whether therapeutic anticoagulation should be started in patients with acute pancreatitis and *** To gain insight into current opinions and clinical decision making of pancreatologists regarding SVT in acute *** A total of 139 pancreatologists of the Dutch Pancreatitis Study Group and Dutch Pancreatic Cancer Group were approached to complete an online survey and case vignette *** threshold to assume group agreement was set at 75%.RESULTS The response rate was 67%(n=93).Seventy-one pancreatologists(77%)regularly prescribed therapeutic anticoagulation in case of SVT,and 12 pancreatologists(13%)for narrowing of splanchnic vein *** most common reason to treat SVT was to avoid complications(87%).Acute thrombosis was the most important factor to prescribe therapeutic anticoagulation(90%).Portal vein thrombosis was chosen as the most preferred location to initiate therapeutic anticoagulation(76%)and splenic vein thrombosis as the least preferred location(86%).The preferred initial agent was low molecular weight heparin(LMWH;87%).In the case vignettes,therapeutic anticoagulation was prescribed for acute portal vein thrombosis,with or without suspected infected necrosis(82%and 90%),and thrombus progression(88%).Agreement was lacking regarding the selection and duration of long-term anticoagulation,the indication for thrombophilia testing and upper endoscopy,and about whether risk of bleeding is a major barrier for therapeutic *** In this national survey,the pancreatologists seemed to agree on the use of therapeutic anticoagulation,using LMWH in the acute phase,for acute portal thrombosis and in the case of thrombus progression,irrespective of the presence of infected necrosis.

关键词： Acute pancreatitis Splanchnic vein thrombosis Therapeutic anticoagulation Bleeding Recanalization Outcomes

novel Pectin/Chia-Mucilage Membranes:Human Serum Albumin Adsorption,Biocompatibility,and Physical-Chemical Properties

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

journal of Renewable Materials 2023年第6期11卷 2647-2663页

作者： S.E.Burruel-Ibarra R.A.Esquer-Osuna R.G.Valdez-Melchor D.A.Cuevas-Acuña L.Quihui-Cota j.juárez j.C.Campos-García E.Valbuena-Gregorio M.A.López-Mata Departamento de Investigación en Polímeros y Materiales Universidad de SonoraHermosilloSonoraMéxico Departamento de Ciencias de la Salud Campus CajemeUniversidad de SonoraCd.ObregónSonoraMéxico Departamento de nutrición Pública y Salud Coordinación de NutriciónCentro de Investigación en Alimentación y DesarrolloA.C.HermosilloSonoraMéxico Departamento de Física Universidad de SonoraHermosilloSonoraMéxico

This study aimed to characterize the physical-chemical and biological properties of pectin(PC)/chia seed mucilage(CM)***/CM[100/0(control),80/20%,60/40%,and 40/60%w/w]membranes were prepared using the casting *** membranes(PC/CM)were thin,yellow,lightly opaque(≈10%)and capable of blocking light UVB(between 66 at 52%).SEM analysis showed the presence of aggregates in the shape of a sphere(≈13μm)and ovoid(≈25μm).The proportion of 80/20 showed an increase in tensile strength(29%)and elastic modulus(19%)when compared to the *** analysis exhibited intermolecular interactions between PCPC,PC-CM,and CM-CM in the *** thermal analysis(600°C)showed a slight improvement in the percentage of residual mass-loss of 3.31%(80/20)that *** 40/60 membrane showed the lowest percentage of hemolysis(2.94%)but limited human albumin adsorption *** results suggested that the blend PC/CM may be considered as a biomaterial for medical applications.

关键词： Pectin chia mucilage membrane hemolysis albumin biomaterial

微间隙受限液体行为与昆虫爪垫在光滑壁面的粘着机理

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

物理学报 2007年第8期56卷 4722-4727页

作者：张晓昊张向军刘永和 j.A.Schaefer 温诗铸清华大学摩擦学国家重点实验室 Department of Technical Physics Centre for Micro and NanotechnologiesTechnical University of IlmenauIlmenau98693Germany

自然界中许多昆虫通过分泌一层油性液体薄膜实现其爪垫表皮和光滑壁面之间粘附和解粘附,从而实现在光滑壁面上的快速爬行.为了揭示昆虫爪垫与光滑壁面间微量液体薄膜对生物粘着的意义,基于自行研制的粘着接触实验仪,采用微量的[emim][Tf... 详细信息

自然界中许多昆虫通过分泌一层油性液体薄膜实现其爪垫表皮和光滑壁面之间粘附和解粘附,从而实现在光滑壁面上的快速爬行.为了揭示昆虫爪垫与光滑壁面间微量液体薄膜对生物粘着的意义,基于自行研制的粘着接触实验仪,采用微量的[emim][Tf2n]离子液体和聚α烯烃油,观测其受限在纳米级光滑钢球表面与玻璃表面之间的接触行为以及法向粘着力.实验发现,临界体积(10-12—10-9L)范围内的受限液滴达到临界厚度(小于2μm)后会出现自动铺展和瞬时收缩行为,并同时提供幅值稳定且数值相当大的法向粘着力.这一现象与液桥弯月面的毛细作用有本质区别,受限液体薄膜表现出一定的类固化特征.基于这一现象,昆虫通过控制爪垫与壁面间受限液体的膜厚或液体量,就可以控制爪垫与光滑壁面粘着应力的大小(由0.45mPa减小到0mPa左右),从而实现稳固的粘附和快速的解粘附.微间隙受限液体的粘着行为研究可以为昆虫爪垫粘着机理及相关的仿生技术提供物理基础.

关键词：受限液体粘着力昆虫爪垫类固化

维普期刊数据库

Species of Lasiodiplodia associated with mango in Brazil

在线全文

学校读者我要写书评

暂无评论

Fungal Diversity 2013年第4期61卷 181-193页

作者： Marília W.Marques nelson B.Lima Marcos Antônio de Morais jr Maria Angélica G.Barbosa Breno O.Souza Sami j.Michereff Alan j.L.Phillips Marcos P.S.Câmara Departamento de Agronomia Universidade Federal Rural de Pernambuco52171-900 RecifeBrazil Departamento de Genética Universidade Federal de Pernambuco50732-970 RecifeBrazil Embrapa Semi-Árido 56302-970 PetrolinaBrazil Centro de Recursos Microbiológicos Departamento de Ciências da VidaFaculdade de Ciências e TecnologiaUniversidade Nova de Lisboa2829-516 CaparicaPortugal

Mango(Mangifera indica)is a major tropical fruit species cultivated in *** objective of this study was to identify species of Lasiodiplodia associated with dieback and stem-end rot of mango in the semi-arid region of northeastern Brazil,and compare the species in relation to mycelial growth,pathogenicity and virulence.A total of 120 isolates of Lasiodiplodia were used and identifications were made using a combination of morphology and phylogenetic analysis based on partial translation elongation factor 1-αsequence(EF1-α)and internal transcribed spacers(ITS).The following species were identified:Lasiodiplodia crassispora,***,***,***,***,*** and Lasiodiplodia sp..Lasiodiplodia theobromae was the most frequently isolated species,which represented 41%of all the *** this species had been previously reported on mango in Brazil,while the other species represent the first report associated with mango tree diseases in this *** crassispora is reported for the first time associated with mango diseases *** were significant differences in mycelial growth rates among the Lasiodiplodia species and also in the optimum temperature for *** species of Lasiodiplodia were pathogenic on mango *** were significant differences in virulence among the species,wherein *** and Lasiodiplodia *** the most virulent,while the least virulent were ***,***,*** and ***.

关键词： Botryosphaeriaceae Mangifera indica ITS EF1-α Phylogeny Virulence

基于人工智能的乳腺X线摄影及断层摄影减轻乳腺癌筛查工作负荷的策略：一项回顾性评估

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

国际医学放射学杂志 2021年第5期 596-597页

作者： j.L.Raya-Povedano S.Romero-Martín E.Elías-Cabot A.Gubern-Mérida A.Rodríguez-Ruiz M.álvarez-Benito 张俊杰

摘要考虑到较大的工作负荷及较高的假阳性、假阴性率,乳腺癌筛查项目的工作流程应该进一步改善。目的评估使用人工智能(AI)系统能否在不减少癌症检出的基础上,减

关键词：

相位对比MRI对健康儿童和青壮年在空腹和餐后状态下内脏、胸腹和脑血流量值参考范围的确定

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

国际医学放射学杂志 2017年第6期 726-727页

作者： P.Muthusami S.j.Yoo R.Chaturvedi n.Gill j.Windram D.Schantz 黄旭方 Department of Medical Imaging University of Toronto

摘要目的使用相位对比MRI评估儿童和青壮年在空腹和餐后状态下主要内脏、胸腹和颈部血管血流量(BFV)的参考范围。材料与方法本前瞻性研究获伦理委员会批准,对

关键词：参考范围 BFV 相位对比 MRI 青壮年

CHOP THER APY InDUCED MITOCHOnDRIAL REDOX STATE ALTERATIOn In nOn-HODGKIn'S LYMPHOMA XEnOGRAFTS

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

journal of Innovative Optical Health Sciences 2013年第2期6卷 29-35页

作者： H.n.XU H.ZHAO T.A.MIR S.C.LEE M.FEnG R.CHOE j.D.GLICKSOn L.Z.LI Department of Radiology University of Pennsylvania PhiladelphiaPAUSA Britton Chance Laboratory of Redox Imaging johnson Research Foundation Department of Biochemistry and Biophysics University of Pennsylvania PhiladelphiaPAUSA Biostatistics and Data Management Core The Children's Hospital of Philadelphia(CHOP) PhiladelphiaPAUSA Department of Biomedical Engineering University of Rochester RochesterNYUSA Abramson Cancer Center University of Pennsylvania PhiladelphiaPAUSA Institute of Translational Medicine and Therapeutics University of Pennsylvania PhiladelphiaPAUSA

We are interested in investigating whether cancer therapy may alter the mitochondrial redox state in cancer cells to inhibit their growth and *** redox state can be imaged by the redox scanner that collects the fuorescence signals from both the oxidized-fAavoproteins(Fp)and the reduced form of nicotinamide adenine dinucleotide(nADH)in snap frozen tissues and has been previously employed to study tumor aggressiveness and treatment ***,with the redox scanner we investigated the effects of chemotherapy on mouse xenografts of a human diffuse large *** lymphoma cell line(DLCL2).The mice were treated with CHOP therapy,i.e,cyclophosphamide(C)+hydroxydoxorubicin(H)+Oncovin(O)+prednisone(P)with CHO administration on day 1 and prednisone administration on days *** Fp content of the treated group was significantly decreased(p=0.033)on day 5,and the mitochondrial redox state of the treated group was slightly more reduced than that of the control group(p=0.048).The decrease of the Fp heterogeneity(measured by the mean st andard deviation)had a border-line statistical significance(p=0.071).The result suggests that the mitochondrial metabolism of lymphoma cells was slightly suppressed and the lymphomas became less aggressive after the CHOP therapy.

关键词： nA DH flavoprotein DLCL2 therapeutic effect tumor metabolism

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

高效发动机实现超低氮氧化物尾气排放的对策

汽车与新动力 2021年第2期4卷 42-48页

作者： [美]B.ADELMAn [美]n.SInGH [美]P.CHARInTRAnOnD [美]j.MAnIS 张然治(译) 不详

研究考虑将选择性催化还原(SCR)系统置于柴油机氧化型催化器(DOC)上游,使上游催化系统快速起燃,以实现在整个复合联邦测试规程(FTP)和坡道实验规程(RMC)期间实现低于0.07 g/(kW·h)的氮氧化物(nOx)排放目标。对发动机机外nOx水平、排气... 详细信息

研究考虑将选择性催化还原(SCR)系统置于柴油机氧化型催化器(DOC)上游,使上游催化系统快速起燃,以实现在整个复合联邦测试规程(FTP)和坡道实验规程(RMC)期间实现低于0.07 g/(kW·h)的氮氧化物(nOx)排放目标。对发动机机外nOx水平、排气温度,以及上下游SCR之间的剂量水平进行权衡比较。针对n2O形成和nH3逃逸,对nOx转化效率进行比较。研究结果显示,即使使用“超低nOx”后处理系统和“2027nOx”发动机标定,如果目标尾管nOx限值为0.027 g/(kW·h),在冷态FTP工况下,最初260s内的累积尾管nOx排放也超过了整个复合FTP工况期间所允许尾管nOx排放量,故需要另外采取措施才能达到此尾管nOx排放水平。改进SCR配方,在低于180℃的低温下实现高于50%的nOx转化率。在达到高nOx转化之前,需要更少nH3储存的SCR配方,让还原剂较早起效是降低尾管nOx排放量的潜在方法。

关键词：高效柴油机机内/机外净化超低nOx排放还原剂

维普期刊数据库