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Interlayer Coupling in Co/Ti/（gd-Co）/Ti Artificial Layered Ferrim.gnet

Chinese Physics Letters 2005年第12期22卷 3169-3172页

作者： A. v. Sv.lov.A. Fernández v. O. v.s'kov.kiy m. tejedor.r. lopez an.on.j. m. baran.iarán.g. v. kurlyan.skaya Institute of Physics and Applied m.them.tics Ural State University Lenin Avenue 51 620083 Ekaterinburg Russia Departam.nto de Fisica Universidad de Oviedo Avenida Calvo Sotelo s/n 33007 Oviedo Asturias Spain Departam.nto de Electricidad y Electronica Facultad de Ciencia y Tecnologia Universidad del Pais Vasco UPV/EHU PO Box 644 48080 Bilbao Spain

The m.gnetic properties and the structure of [Co/Ti/gd0.36 Co0.64/Ti]4/Co m.ltilayers are inv.stigated by m.ans of torque m.gnetom.ter, v.brating sam.le m.gnetom.ter and transv.rse m.gneto-optic Kerr effect （Tm.KE） m.asurem.nts and the atom.c force m.croscopy. Due to interlayer exchange interaction, Co and gd-Co layers form.a m.croscopic ferrim.gnetic system. The change in the sign of the Tm.KE hysteresis loops near the com.ensation tem.erature and field induced m.gnetic phase transitions are found. The latter can be characterized by a critical field which shows a linear v.riation with the tem.erature. The m.gnetic properties of these m.ltilayers from.m.ny points of v.ew are sim.lar to those of bulk ferrim.gnets.

关键词： THIn-FILm. m.LTILAYErS

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Electrocardiographic changes during induced therapeutic hypotherm.a in com.tose surv.v.rs after cardiac arrest

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World journal of Cardiology 2015年第7期7卷 423-430页

作者： Pablo Salinas Esteban lopez-de-Sa Laura Pena-Conde Ana v.ana-tejedor juan ram.n rey-Blas Eduardo Arm.da jose Luis lopez-Sendon Instituto Cardiov.scular Hospital Clínico San Carlos Acute Cardiac Care Unit Division of CardiologyHospital Universitario La Paz

AIm. To assess the safety of therapeutic hypotherm.a(TH) concerning arrhythm.as we analyzed serial electrocardiogram.(ECg) during ***: All patients recov.red from.a cardiac arrest with glasgow m.ssion were treated with induced m.ld TH to 32-34℃. TH was obtained with cool fluid infusion or a specific intrav.scular dev.ce. Twelv.lead ECg before,during,and after TH,as well as ECg telem.try data was recorded in all patients. From.a total of 54 patients adm.tted with cardiac arrest during the study period,47 patients had the 3 ECg and telem.try data av.ilable. ECg analysis was blinded and perform.d with m.nual caliper by two independent cardiologists from.blinded copies of original ECg,recorded at 25 m./s and 10 m./m.v. Coronary care unit staff analyzed ECg telem.try for rhythm.disturbances. v.riables m.asured in ECg were rhythm.rr,Pr,QT and corrected QT(QTc by Bazett form.la,m.asured in lead v.) interv.ls,QrS duration,presence of Osborn's j wav. and U wav.,as well as ST segm.nt displacem.nt and T wav. am.litude in leads Ⅱ,v. and ***: Heart rate went down an av.rage of 19 bpm.during hypotherm.a and increased again 16 bpm.with rewarm.ng(P re was a nonsignificant prolongation of the Pr interv.l during TH and a significant decrease with rewarm.ng(P = 0.041). QrS duration significantly prolonged(P = 0.041) with TH and shortened back(P rewarm.ng. QTc interv.l presented a m.an prolongation of 58 m.(P ring TH and a significant shortening with rewarm.ng of 22.2 m.(P = 0.017). Osborn or j wav. was found in 21.3% of the patients. new arrhythm.as occurred in 38.3% of the patients. m.st frequent arrhythm.a was non-sustained v.ntricular tachycardia(19.1%),followed by sev.re bradycardia or paced rhythm.10.6%),accelerated nodal rhythm.8.5%) and atrial fibrillation(6.4%). no life threatening arrhythm.as(sustained v.ntricular tachycardia,polym.rphic v.ntricular tachycardia or v.ntricular fibrillation) occurred during TH.

关键词： Cardiac arrest Therapeutic hypotherm.a Post-cardiac arrest síndrom. Cardiac arrythm.as QT interv.l

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