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Tuning Exchange Anisotropy of Exchange-Biased System

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Communications in Theoretical Physics 2008年第7期50卷 253-256页

作者： XU Yan HU Jing-Guo r.l. Stamps College of Physical Science and Technology University of Yangzhou Yangzhou 225002 China School of Physics M013 University of Western Australia 35 Stirling Highway Crawley WA 6009 Australia

Exchange anisotropy in FM/AFM bilayers has given a lot of static magnetization properties such as enhanced coercivity and magnetization loop shifts. These phenomena are primar.l. from the effective anisotropies introduced into a ferromagnet by exchange coupling with a strongly anisotropic antiferromagnet. These effective anisotropies can also be used to explain the dynamic consequences of exchange-biased bilayers. In this article, the dynamic consequences such as exchange-induced susceptibility, exchange-induced permeability, and the corresponding domain wall characteristics in the exchange-biased structures of ferromagnet/antiferromagnetl/antiferromagnet2 are studied. The results show that the second antiferromagnetic layer can largely affect the dynamic consequences of exchange-blazed bilayers. Especially in the case of critical temperature, the effects become more obvious. Practically, the exchange anisotropy of biased bilayer system can be tuned by exchange coupling with the second antiferromagnetic layer.

关键词： Idomain effects susceptibility permeability FM/AFM1/AFM2 tr.l.yers

Voltammetric sensor based on cobalt-poly(methionine)-modified glassy carbon electrode for determination of estriol hormone in pharmaceuticals and urine

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Journal of Pharmaceutical Analysis 2019年第5期9卷 347-357页

作者： Eliziana S. Gomes Fernando r.F. leite Bruno r.l. Ferraz Henrique A.J.l. Mourao Andrea r. Malagutti Department of Pharmacy Faculty of Biological and Health Sciences Federal University of Jequitinhonha and Mucuri Valleys MGT 367 Highway e Km 583 CEP 39100-000 Diamantina MG Brazil Department of Biology Federal University of Espírito Santo CEP 29500-000 Alegre ES Brazil Institute of Science and Technology Federal University of Jequitinhonha and Mucuri Valleys MGT 367 Highway e Km 583 CEP 39100-000 Diamantina MG Brazil

A voltammetric sensor based on the electropolymerization of cobalt-poly(methionine)(Co-poly(Met)) on a glassy carbon electrode (GCE) was developed and applied for the determination of estriol by differential pulse voltammetry (DPV) for the first time. The electrochemical properties of the Co-poly(Met)/GCE were analysed by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were used to characterize the polymers on the GCE surface. The deposition of the Co-poly(Met) film on the GCE surface enhanced the sensor electronic transfer. CV studies revealed that estriol exhibits an irreversible oxidation peak at t0.58 V for the Co-poly(Met)/GCE (vs. Ag/AgCl reference electrode) in 0.10 mol/l Britton-robinson buffer solution (pH=7.0). Different voltammetric scan rates (10-200 mV/s) suggested that the estriol oxidation on the Co-poly(Met)/GCE surface is contr.l.ed by adsorption and diffusion processes. Based on the optimized DPV conditions, the linear responses for estriol quantification were from 0.596 μmol/l to 4.76 μmol/l (r2 =0.996) and from 5.66 μmol/l to 9.90 μmol/l (r2 =0.994) with a limit of detection (lOD) of 0.0340 μmol/l and a limit of quantification (lOQ) of 0.113 μmol/l. The DPV-Co-poly(Met)/GCE method provided good intra-day and inter-day repeatability with rSD values lower than 5%. Also, no interference of real sample matrices was observed on the estriol voltammetric response, making the DPV-Copoly( Met)/GCE highly selective for estriol. The accuracy test showed that the estriol recovery was in the ranges 96.7%-103% and 98.7%-102% for pharmaceutical tablets and human urine, respectively. The estriol quantification in pharmaceutical tablets performed by the Co-poly(Met)/GCE-assisted DPV method was comparable to the official analytical protocols.

关键词： Estriol Electroanalysis Differential pulse voltammetry Cobalt-poly(methionine) film-modified glassy carbon electrode

Proto-Adamastor ocean crust(920 Ma)described in Brasiliano Orogen from coetaneous zircon and tourmaline

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Geoscience Frontiers 2019年第4期10卷 1623-1633页

作者： léo A.Hartmann Mariana Werle Cassiana r.l. Michelin Cristiano lana Gláucia N. Queiroga Marco P. Castro Karine r. Arena Instituto de Geociências Universidade Federal do Rio Grande do SulAvenida Bento Goncalves950091501-970Porto AlegreRio Grande do SulBrazil Departamento de Geologia Escola de MinasUniversidade Federal de Ouro PretoMorro do Cruzeiro35400-000Ouro PretoMinas GeraisBrazil

Proto-Adamastor ocean bathed rodinia and successor continental fragments from 1.0-0.9 Ga up to0.75 Ga,and evolved into world Adamastor Ocean at 0.75-0.60 *** oceanic crust is poorly preserved on continents,only indirect evidence registered in Brasiliano *** report first evidence of ophiolite originated in *** use multi-technique U-Pb-Hf zircon andδ^11B tourmaline isotopic and elemental *** host tourmalinite is enclosed in metaserpentinite,both belonging to the Bossoroca *** is 920 Ma-old,εHf(920 Ma)=+12,HfTDM=1.0 Ga and has’oceanic’composition(e.g.,U/Ybrmaline is dravite withδ^11B=+1.8‰(Tur 1),0‰(Tur 2),-8.5‰(Tur 3).These characteristics are a novel contribution to rodinia and associated world ocean,because a fragment of proto-Adamastor oceanic crust and mantle evolved at the beginning of the Brasiliano Orogen.

关键词： Coeval zircon and tourmaline Bossoroca ophiolite Early Brasiliano Orogen Zircon U-Pb-Hf isotopes Zircon trace elements Tourmaline boron isotopes

CArBIDE PrECIPITATION AND BAINITE TrANSFOrMATION IN Fe-C-Si AllOY

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Acta Metallurgica Sinica(English letters) 1996年第5期9卷 373-378页

作者： r.l. Zuo l. Fang and P. D. Ding(Department of Metallurgy and Materials Engineering, Chongqing University, Chongqing 630044, China)

The upper bainite formed isothermally at 480℃ C in Fe-0. 38C-1. 73Si alloy was studied by using transmission electron microscopy (TEM). It was found by electron diffraction and crystallographic analysis that bainitic carbide precipitation originated from bainitic ferrite (BF), in which the initial supersaturation did not come up to the average carbon content of the alloy. It is suggested that bainite transformation in steel should be a coupled process of transformation dislocation movement contr.l.ed by carbon diffusion in austenite.

关键词： bainite carbide shear dislocation

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绑架

绑架

作者： r.l.·史蒂文森(r.l. Stevenson)

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宝岛

宝岛

Selecting Subsoilers to reduce Soil Compaction and Minimize residue Burial

作者： r.l.·斯蒂文生(r.l. Stevenson)

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Selecting Subsoilers to Reduce Soil Compaction and Minimize ...

国际农业工程大会

作者： r.l. raper Agricultur.l.Engineer Lead Scientist USDA-ARS-National Soil Dynamics Laboratory Conservation Systems Research 411 S. Donahue Drive Auburn AL 36832

＜正＞ Aboveground soil disruption prior to planting is avoided in conservation tillage systems due to the need to keep plant residue in place. However, belowground disruption is necessary in many Southeastern U.S. soils to ameliorate soil compaction problems. For use in conservation tillage systems, belowground soil disruption should be maximized while aboveground disruption should be minimized. To assist in choosing the best shank for strip-tillage systems which accomplish both objectives, comparisons were made between sever.l.shanks commonly used for conservation tillage systems to provide in-row subsoiling prior to planting.

关键词： Draft force drawbar power cone index bulk density residue bentleg shanks subsoiler soil compaction

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中国仪器仪表学会测试基础

1985年

作者：（美）r.l.摩尔

来源：汇雅图书（南通市图书馆... 评论

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N AND △ rESONANCES

Chinese Physics C 2016年第10期40卷 808-812页

作者： V. Burkert E. Klempt M.r. Pennington l. Tiator r.l. Workman Jefferson lab University of Bonn University of Mainz George Washington University

I. Introduction The excited states of the nucleon have been studied in a large number of formation and production experiments. The Breit-Wigner masses and widths, the pole positions, and the elasticities of the N and A resonances in the Baryon Summary Table come largely from partial-wave analyses of πN total, elastic, and charge-exchange scattering data. The most comprehensive analyses were carried out by the Karlsruhe-Helsinki （KH80） [1], Carnegie Mellon-Berkeley （CMBS0） [2],

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