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40-meter-long REBCO tapes with critical current over 4,000 A/12 mm at 4.2 K and 13 T by advanced MOCVD

Superconductivity 2024年第1期9卷 29-34页

作者： mahesh Paidpilli Chirag Goel Bhabesh Sarangi Siwei Chen Eduard Galstyan Jan Jaroszynski Griffin Bradford Dmytro Abraimov venkat Selvamanickam Department of Mechanical Engineering Advanced Manufacturing InstituteTexas Center for SuperconductivityUniversity of HoustonHoustonTexasUSA AMPeers LLC HoustonTexasUSA National High Magnetic Field Laboratory TallahasseeFloridaUSA

REBa_(2)Cu_(3)O_(7−δ)(REBCO,RE=rare earth)tapes doped with 5%and 15%Zr have been scaled up to lengths more than 40 m in a pilot‐scale advanced metal organic chemical vapor deposition(A‐MOCVD)*** precursor compositions used for the long tapes were guided by a study of the influence of(Ba+dopant)/Cu content on the critical current density(Jc)of 5 and 15 mol.%Hf‐and Zr‐added tapes at 4.2 K and 13 *** 40‐mlong tapes exhibited a critical current(Ic)over 4,000 A/12 mm at 4.2 K and 13 T as well as over 1,400 A/12 mm at 20 K and 20 *** critical current densities of a 40‐m‐long tape doped with 5%Zr at 4.2 K measured at the National High Magnetic Field Laboratory(NHMFL)were>10 MAcm^(−2)and>5 MAcm^(−2)at 14 T and 30 T,respectively,which are over three times those of commercial REBCO *** infield Jc of 5%Zradded 40‐m‐long tapes was similar to those of previously‐reported high‐performance short samples made with 15%Zr or *** results demonstrate the excellent potential of A‐MOCVD for manufacturing high Ic REBCO tapes for use in ultrahigh‐field magnet applications.

关键词： High‐temperature superconductors MOCVD REBCO Critical current

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Endoscopic mucosal resection of colorectal polyps in typical UK hospitals

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World Journal of Gastroenterology 2010年第42期16卷 5324-5328页

作者： Teegan R Lim venkat mahesh Salil Singh Benjamin HL Tan Mohamed Elsadig Nerukav Radhakrishnan Phil Conlong Chris Babbs Regi George Department of Gastroenterology and Medicine Rochdale InfirmaryRochdaleOL12 0NBUnited Kingdom Department of Gastroenterology and Medicine Royal Oldham HospitalOldhamOL1 2JHUnited Kingdom Department of Gastroenterology and Medicine Salford Royal HospitalStott LaneSalfordM6 8HDUnited Kingdom Division of Gastrointestinal Surgery Nottingham Digestive Diseases Centre NIHR Biomedical Research UnitNottingham University HospitalsQueen's Medical CentreNottinghamNG7 2 UHUnited Kingdom

AIM:To evaluate the outcomes of endoscopic mucosal resection(EMR) for colorectal polyps,with particular regard to procedural complications and recurrence rate,in typical United Kingdom(UK) hospitals that perform an average of about 25 colonic EMRs per ***:A total of 239 colorectal polyps(≥ 10 mm) resected from 199 patients referred to Rochdale Infirmary,Salford Royal Hospital and Royal Oldham Hospital for EMR between January 2003 and January 2009 were ***:The mean size of polyps resected was 19.6 ± 12.4 mm(range 10-80 mm).The overall major complication rate was 2.1%.Complications were less frequent with non-adenomas compared with the other groups(Pearson's χ 2 test,P < 0.0001).Resections of largersized polyps were more likely to result in complications(unpaired t-test,P = 0.021).Recurrence was associated with histology,with carcinoma-in-situ more likely to recur compared with low-grade dysplasia [hazard ratio(HR) 186.7,95% confidence interval(95% CI):8.81-3953.02,P = 0.001].Distal lesions were also more likely to recur compared with right-sided and transverse colon lesions(HR 5.93,95% CI:1.35-26.18,P = 0.019).CONCLUSION:EMR for colorectal polyps can be performed safely and effectively in typical UK *** follow-up is required for histologically advanced lesions due to increased recurrence risk.

关键词： Endoscopic mucosal resection Polyps Endoscopic Resection

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Miliary nodules due to secondary pulmonary hemosiderosis in rheumatic heart disease

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World Journal of Radiology 2011年第2期3卷 51-54页

作者： Gyanendra Agrawal Ritesh Agarwal Manoj Kumar Rohit venkat mahesh Rakesh Kumar Vasishta Department of Pulmonary Medicine Postgraduate Institute of Medical Education and Research Department of Cardiology Postgraduate Institute of Medical Education and Research Department of Histopathology Postgraduate Institute of Medical Education and Research

Pulmonary hemosiderosis is defined as the clinical and functional consequence of iron overload of the lungs,which usually occurs due to recurrent intra-alveolar *** can manifest as miliary mottling and should be entertained in the differential diagnosis of patients presenting with miliary nodules on chest radiography,especially those with mitral *** management of secondary pulmonary hemosiderosis secondary to valvular heart disease includes valvuloplasty and/or valve *** radiological opacities may disappear with successful treatment of the underlying valvular disease in many ***,they may persist with no physiological impairment to the ***,we present a 32-year-old man with mitral stenosis who presented with fever and miliary shadows on chest radiography,which was ultimately diagnosed as secondary pulmonary hemosiderosis.

关键词： Miliary nodules Mitral stenosis Tuberculosis:Hemosiderosis

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