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磁共振胰胆管造影在梗阻性黄疸患者中的应用

世界核心医学期刊文摘（胃肠病学分册） 2005年第4期1卷 52-52页

作者： vaishali M.d. Agarwald A.K. Upadhyaya N. v.K. Shukla 赵丽娜 department of General Surgery Institute of Medical Sciences Banaras Hindu University Varanasi 221 005 IndiaProf.

Goals: To determine the ability of magnetic resonance cholangiopancreatography (MRCP) to diagnose the level and cause of obstruction in patients with obstructive jaundice. Background: The limitations of available imaging modalities have led to the increasing use of MRCP, which is a noninvasive and highly accurate technique in evaluating patients with biliary obstruction. Study: Thirty patients were included in this study. MRCP was done using a fat suppressed heavily T2 weighted fast spin echo sequence. The MRCP findings were confirmed on surgical exploration or clinical follow-up. Results: MRCP could correctly identify ductal dilatation and the level of obstruction in all cases, except one. All causes of obstruction, except three, were detected. It failed to detect a common bile duct calculus in a minimally dilated ductal system and misdiagnosed a case of focal chronic pancreatitis as carcinoma head pancreas and a small pancreatic head mass as cholangiocarcinoma. It had a sensitivity of 94.44%, specificity of 81.81%, positive predictive value of 89.47%, and negative predictive value of 90%for the detection of malignant causes. The overall diagnostic accuracy for detection of level and cause of obstruction was 96.3%and 89.65%, respectively. Conclusion: The high diagnostic accuracy of MRCP in evaluating patients with obstructive jaundice indicates that it has the potential to become the diagnostic modality of choice in such patients.

关键词：阻性脂肪抑制技术胆管梗阻成像设备胆总管结石梗阻程度梗阻原因胰头癌慢性胰腺炎阴性预测值

Numerical investigation of spallation neutrons generated from petawatt-scale laser-driven proton beams

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Matter and Radiation at Extremes 2022年第2期7卷 8-17页

作者： B.Martinez S.N.Chen S.Bolaños N.Blanchot G.Boutoux W.Cayzac C.Courtois X.davoine A.duval v.Horny I.Lantuejoul L.Le deroff P.E.Masson-Laborde G.Sary B.vauzour R.Smets L.Gremillet J.Fuchs LULI-CNRS CEAUPMC Univ Paris 06:Sorbonne UniversitéEcole PolytechniqueInstitut Polytechnique de ParisF-91128 Palaiseau CedexFrance CEA DAMDIFF-91297 ArpajonFrance Horia Hulubei National Institute of Physics and Nuclear Engineering Bucharest-MagureleRomania CEA DAMCESTAF-33114 Le BarpFrance UniversitéParis-Saclay CEALMCE91680 Bruyères-le-ChâtelFrance LPP Sorbonne UniversitéCNRSEcole PolytechniqueF-91128 Palaiseau CedexFrance

Laser-driven neutron sources could offer a promising alternative to those based on conventional accelerator technologies in delivering compact beams of high brightness and short *** examine this through particle-in-cell and Monte Carlo simulations that model,respectively,the laser acceleration of protons from thin-foil targets and their subsequent conversion into neutrons in secondary lead *** parameters relevant to the 0.5 PW LMJ-PETAL and 0.6–6 PW Apollon systems are *** to its high intensity,the 20-fs-duration 0.6 PW Apollon laser is expected to accelerate protons up to above 100Mev,thereby unlocking efficient neutron generation via spallation *** a result,despite a 30-fold lower pulse energy than the LMJ-PETAL laser,the 0.6 PW Apollon laser should perform comparably well both in terms of neutron yield and ***,we predict that very compact neutron pulses,of∼10 ps duration and∼100μm spot size,can be released provided the lead convertor target is thin enough(∼100μm).These sources are characterized by extreme fluxes,of the order of 10^(23) n cm^(−2) s^(−1),and even ten times higher when using the 6 PW Apollon *** values surpass those currently achievable at large-scale accelerator-based neutron sources(∼10^(16) n cm^(−2) s^(−1)),or reported from previous laser experiments using low-Z converters(∼10^(18) n cm^(−2) s^(−1)).By showing that such laser systems can produce neutron pulses significantly brighter than existing sources,our findings open a path toward attractive novel applications,such as flash neutron radiography and laboratory studies of heavy-ion nucleosynthesis.

关键词： thereby attractive extreme

饲料中添加海甘蓝对羔羊采食量、消化率、生长性能、胴体品质和肉质的影响

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饲料博览 2016年第7期26卷 55-55页

作者： ítavo L C v de Souza A d v Fávaro S P ítavo C C B F Petit H v dias A M Morais M G Coelho R G Reis F A Costa J A A Roscoe R

试验旨在明确饲料中不同添加量的海甘蓝(CM)替代大豆对羔羊采食量、生长性能、血液参数、胴体品质和肉品质的影响。选取特塞尔羔羊80头,包括40头公羊(23.3±0.98 kg)和40头母羊(22.1±0.95 kg),随机分成4组,饲料分别添加CM 0、64、128、... 详细信息

试验旨在明确饲料中不同添加量的海甘蓝(CM)替代大豆对羔羊采食量、生长性能、血液参数、胴体品质和肉品质的影响。选取特塞尔羔羊80头,包括40头公羊(23.3±0.98 kg)和40头母羊(22.1±0.95 kg),随机分成4组,饲料分别添加CM 0、64、128、192 g·kg^(-1)。结果表明,干物质采食量与CM添加量成线性增加关系,但添加CM对消化率和体增重无显著影响。随着饲料中CM含量的增加,料重比降低。各组间胴体重量和商用肉含量无显著差异。饲料中添加较高含量CM使羔羊肌肉比例和肉骨率降低。随着CM添加量的增加,公羊皮下脂肪含量显著低于母羊,公羊和母羊间除皮下脂肪含量不同,其他各组数据相近。各组间的背最长肌的化学组成和肉品质均相似。试验结果表明,当CM在生长期羔羊饲料中添加量达到192 g·kg^(-1),日粮精粗比为350~650时,CM对羔羊胴体品质和生产性能无不良影响。

关键词：干物质采食量胴体品质生长性能海甘蓝消化率饲料羔羊肉质

饲料中添加不同含量的海甘蓝对羔羊采食量、消化率、生产性能、胴体品质和肉品质的影响

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饲料博览 2016年第6期 55-55页

作者： ítavo L C v Souza A d v de Fávaro S P ítavo C C B F Petit H v dias A M Morais M G Coelho R G Reis F A Costa J A A Roscoe R

试验通过饲喂不同含量的海甘蓝替代豆粕日粮（CM）,观察羔羊的采食量、生长性能、血液参数、胴体品质和肉品质变化。选取特塞尔绵羊80头,包括公羊（23.3±0.98 kg）40头和母羊（22.1±0.95 kg）40头,均为羔羊,随机分为4组,分别饲喂含CM... 详细信息

试验通过饲喂不同含量的海甘蓝替代豆粕日粮（CM）,观察羔羊的采食量、生长性能、血液参数、胴体品质和肉品质变化。选取特塞尔绵羊80头,包括公羊（23.3±0.98 kg）40头和母羊（22.1±0.95 kg）40头,均为羔羊,随机分为4组,分别饲喂含CM干物质（dM）0、64、128和192 g·kg-1的饲料。随着CM含量的增加,dM采食量也随之增加,但对消化率和日增重无显著影响。随着CM添加量增加,料重比降低,胴体品质和商用肉含量相近。高含量CM组羔羊的肌肉比例和肉骨率降低。随着日粮中CM含量的增加,公羊胴体脂肪含量远低于母羊,而其余指标对公羊母羊的影响相近。背最长肌的化学组成和品质在各组间无显著差异。试验结果表明,饲粮中添加CM量达192 g·kg-1,饲料精粗比为350650时,对生长期羔羊的胴体品rfm和生长性能无不良影响。

关键词：羔羊海甘蓝胴体背最长肌

Preclinical therapy of benign prostatic hyperplasia with neuropeptide hormone antagonists

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World Journal of Clinical Urology 2014年第3期3卷 184-194页

作者： Petra Popovics Andrew v Schally Norman L Block Ferenc G Rick division of Cardiovascular diseases Department of Medicine Miller School of Medicine University of MiamiMiami FL 33136 United States department of Medicine Ⅲ Medical Faculty Carl Gustav CarusD-01307 TU Dresden Germany veterans Affairs Medical Center and South Florida veterans Affairs Foundation for Research and Education Miami FL 33125 United States divisions of Hematology/Oncology and Endocrinology Department of Medicine Miller School of Medicine University of MiamiMiami FL 33136 United States department of Urology Florida International University Herbert Wertheim College of MedicineMiami FL 33199 United States

Benign prostatic hyperplasia(BPH)is a pathologic condition of the prostate described as a substantial increase in its number of epithelial and stromal *** may significantly reduce the quality of life due to the initiation of bladder outlet obstruction and lower urinary tract *** medical therapies mostly consist of inhibitors of 5α-reductase orα1-adrenergic blockers;their efficacy is often *** analogs of neuropeptide hormones are novel candidates for the management of *** first,antagonists of luteinizing hormone-releasing hormone(LHRH)have been introduced to the therapy aimed to reduce serum testosterone ***,they have also been found to produce an inhibitory activity on local LHRH receptors in the prostate as well as impotence and other related side *** then,several preclinical and clinical studies reported the favorable effects of LHRH antagonists in *** contrast,antagonists of growth hormone-releasing hormone(GHRH)and gastrin-releasing peptide(GRP)have been tested only in preclinical settings and produce significant reduction in prostate size in experimental models of *** act at least in part,by blocking the action of respective ligands produced locally on prostates through their respective receptors in the prostate,and by inhibition of autocrine insulin-like growth factors-Ⅰ/Ⅱand epidermal growth factor *** and LHRH antagonists were also tested in combination resulting in a cumulative effect that was greater than that of each *** article will review the numerous studies that demonstrate the beneficial effects of antagonistic analogs of LHRH,GHRH and GRP in BPH,as well as suggesting a potential role for somatostatin analogs in experimental therapies.

关键词： Benign prostatic hyperplasia Luteinizing hormone-releasing hormone Growth hormone-releasing hormone Gastrin-releasing peptide Somatostatin Targeted therapy

P2-type layered high-entropy oxides as sodium-ion cathode materials

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Materials Futures 2022年第3期1卷 171-184页

作者： Junbo Wang Sören L dreyer Kai Wang Ziming ding Thomas diemant Guruprakash Karkera Yanjiao Ma Abhishek Sarkar Bei Zhou Mikhail v Gorbunov Ahmad Omar daria Mikhailova volker Presser Maximilian Fichtner Horst Hahn Torsten Brezesinski Ben Breitung Qingsong Wang Institute of Nanotechnology Karlsruhe Institute of Technology(KIT)Hermann-von-Helmholtz-Platz 176344 Eggenstein-LeopoldshafenGermany Helmholtz Institute Ulm(HIU)Electrochemical Energy Storage Helmholtzstrasse 1189081 UlmGermany Joint Research Laboratory Nanomaterials-Technische Universität darmstadt and Karlsruhe Institute of Technology(KIT) Otto-Berndt-Strasse 364206 DarmstadtGermany Leibniz Institute for Solid State and Materials Research(IFW)dresden Helmholtzstrasse 2001069 DresdenGermany INM-Leibniz Institute for New Materials Campus D2266123 SaarbrückenGermany department for Materials Science and Engineering Saarland UniversityCampus D2266123 SaarbrückenGermany Saarene Saarland Center for Energy Materials and SustainabilityCampus C4266123 SaarbrückenGermany Bavarian Center for Battery Technology(BayBatt) University of BayreuthUniversitätsstrasse 3095447 BayreuthGermany department of Chemistry University of BayreuthUniversitätsstrasse 3095447 BayreuthGermany

P2-type layered oxides with the general Na-deficient composition Na_(x)TMO_(2)(x<1,TM:transition metal)are a promising class of cathode materials for sodium-ion *** open Na+transport pathways present in the structure ... 详细信息

P2-type layered oxides with the general Na-deficient composition Na_(x)TMO_(2)(xde materials for sodium-ion *** open Na+transport pathways present in the structure lead to low diffusion barriers and enable high charge/discharge ***,a phase transition from P2 to O2 structure occurring above 4.2 v and metal dissolution at low potentials upon discharge results in rapid capacity *** this work,we demonstrate the positive effect of configurational entropy on the stability of the crystal structure during battery *** different compositions of layered P2-type oxides were synthesized by solid-state chemistry,Na_(0.67)(Mn_(0.55)Ni_(0.21)Co_(0.24))O_(2),Na_(0.67)(Mn_(0.45)Ni_(0.18)Co_(0.24)Ti_(0.1)Mg_(0.03))O_(2) and Na_(0.67)(Mn_(0.45)Ni_(0.18)Co_(0.18)Ti_(0.1)Mg_(0.03)Al_(0.04)Fe_(0.02))O_(2) with low,medium and high configurational entropy,*** high-entropy cathode material shows lower structural transformation and Mn dissolution upon cycling in a wide voltage range from 1.5 to 4.6 *** operando techniques and post-mortem analysis were used to probe the underlying reaction mechanism ***,the high-entropy strategy is a promising route for improving the electrochemical performance of P2 layered oxide cathodes for advanced sodium-ion battery applications.

关键词： P2-type layered cathode high-entropy oxides sodium-ion battery gassing behavior manganese leaching

Studies of laser-plasma interaction physics with low-density targets for direct-drive inertial confinement fusion on the Shenguang III prototype

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Matter and Radiation at Extremes 2021年第2期6卷 54-66页

作者： v.T.Tikhonchuk T.Gong N.Jourdain O.Renner F.P.Condamine K.Q.Pan W.Nazarov L.Hudec J.Limpouch R.Liska M.Krus F.Wang d.Yang S.W.Li Z.C.Li Z.Y.Guan Y.G.Liu T.Xu X.S.Peng X.M.Liu Y.L.Li J.Li T.M.Song J.M.Yang S.E.Jiang B.H.Zhang W.Y.Huo G.Ren Y.H.Chen W.Zheng Y.K.ding K.Lan S.Weber ELI-Beamlines Institute of PhysicsCzech Academy of Sciences25241 Dolni BrezanyCzech Republic Centre Lasers Intenses et Applications University of Bordeaux-CNRS-CEA33405 TalenceFrance Laser Fusion Research Center China Academy of Engineering PhysicsMianyang 621900China Institute of Plasma Physics Czech Academy of Sciences18200 PragueCzech Republic Independent Foam Target Supplier CarnoustieDD76DPUnited Kingdom Faculty of Nuclear Sciences and Physical Engineering Czech Technical University in Prague11519 PragueCzech Republic Institute of Applied Physics and Computational Mathematics Beijing 100088China Center for Applied Physics and Technology Peking UniversityBeijing 100871China School of Science Xi’an Jiaotong UniversityXi’an 710049China

The physics of laser-plasma interaction is studied on the Shenguang III prototype laser facility under conditions relevant to inertial confinement fusion designs.A sub-millimeter-size underdense hot plasma is created by ionization of a low-density plastic foam by four high-energy(3.2 kJ)laser *** interaction beam is fired with a delay permitting evaluation of the excitation of parametric instabilities at different stages of plasma *** diagnostics are used for plasma characterization,scattered radiation,and accelerated *** experimental results are analyzed with radiation hydrodynamic simulations that take account of foam ionization and *** measured level of stimulated Raman scattering is almost one order of magnitude larger than that measured in experiments with gasbags and hohlraums on the same installation,possibly because of a greater plasma *** amplification is achieved in high-intensity speckles,indicating the importance of implementing laser temporal smoothing techniques with a large bandwidth for controlling laser propagation and absorption.

关键词： density. interaction scattered

ECRIS Charge Breeding at ISAC

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Chinese Physics C 2007年第S1期31卷 211-215页

作者： F.Ames R.Baartman P.Bricault K.Jayamanna M.Mcdonald M.Olivo P.Schmor d.H.L.Yuan T.Lamy TRIUMF 4004 Wesbrook MallVancouverBCV6t 2A3Canada LPSC UJF-IN2P3-CNRS53 Av.Des Martyrs38026 GrenobleFrance

An ECR ion source for charge breeding of radioactive ions from the ISAC facility at TRIUMF has been set up at a test *** has been operated with different ion sources for the injection of singly charged ions and the efficiency,breeding time and emittance have been determined for several elements.A maximum efficiency of more than 6% for the breeding of Kr^(12+) has been achieved so *** the charge exchange of Rb and Cs ions in the range of 10+ to 23+ with residual gas molecules in the transport beam lines has been *** absolute values for the cross sections at 10—15 q kev agree with predictions extrapolated from lower charge states but the strong dependence on the ionization energy of the gas molecules could not be verified.

关键词： ECRIS charge breeding radioactive ions charge exchange

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新型的煤矿井下接地保护电路

煤矿安全 1983年第8期 57-62页

作者： d·K·Mittra S·K·Basu R·K·Mondal 吴百谷 [印度]

一、引言在煤矿井下大多采用中性点限流供电系统(系指英、印等国一编者注),即在电源变压器的中性点与大地之间接一限流电抗器。在发生接地故障时,电抗器能有效地限制故障电流及故障点释放的能量,从而消除或大大减小电弧所导致的瓦斯爆... 详细信息

一、引言在煤矿井下大多采用中性点限流供电系统(系指英、印等国一编者注),即在电源变压器的中性点与大地之间接一限流电抗器。在发生接地故障时,电抗器能有效地限制故障电流及故障点释放的能量,从而消除或大大减小电弧所导致的瓦斯爆炸和火灾危害。例如,中性点电抗为1000Ω时,可将550v

关键词：接地保护 CBT 继电保护接地故障电气故障中性点接地继电器接地装置煤矿井下