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Magnetocaloric effect in ErNi2 melt-spun ribbons

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Journal of Rare Earths 2020年第6期38卷 612-616页

作者： J.L.Sanchez Llamazares P.Ibarra-Gaytan C.f.Sanchez-valdes D.Rlos-Jara P.Alvarez-Alonso Instituto Potosino de Investigacion Ciendfica y Tecnoldgica A.C. Camino a la Presa San Jose 2055Col.Lomas 4San Luis Potosi.S.LP.78216Mexico CPM-TIP University Pavol Jozef SafarikPark Angelinum 9.04154 KosiceSlovakia Division Multidisciplinaria Ciudad UniversitariaUniversidad Aurdnoma de Ciudad Juarez(UACJ)Calle Jose de Jesus Macias Delgado#18100Ciudad Juarez 32579Chihuahua.Mexico Departamento de fisica Universidad de OviedoCalvo Sotelo s/n33007 OviedoSpain

ErNi2 ribbons were produced by rapid solidification using the melt spinning *** structural,magnetic and magnetocaloric properties in the as-solidified state were studied by X-ray diffraction,scanning electron microscopy,magnetization and specific heat *** are single phase with the MgCu2-type crystal structure,a Curie temperature TC of 6.8 K and a saturation magnetization at2 K and 5 T of 124.0 A·m2/*** a magnetic field change μ0△H of 5 T(2 T) ribbons show a maximum magnetic entropy change |△SMpeak| of 24.1(16.9) J/(kg·K),and an adiabatic temperature change △Tadmax of8.1(4.4) K;this is similar to the previously reported literature for bulk alloys that were processed through conventional melting techniques followed by prolonged thermal *** addition,the samples also show slightly wider △SM(T) curves with respect to bulk alloys leading to a larger refrigerant capacity.

关键词： ErNi2 Laves phase Melt-spun ribbons Magnetic entropy change Adiabatic temperature change Rare Earths

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Species richness and community structure of class Polyplacophora at the intertidal rocky shore on the marine priority region no.33,Mexico

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Open Journal of Ecology 2014年第2期4卷 43-52页

作者： Lizeth Galeana-Rebolledo Rafael flores-Garza Adriana reyes-Gomez Sergio Garcia-Ibanez Pedro flores-Rodriguez Carmina Torreblanca-Ramirez Arcadio valdes-Gonzalez Unidad Academica de Ecologia Marina Universidad Autonoma de GuerreroAcapulcoMexico Universidad Autonoma de Nuevo Leon Laboratorio de AcuaculturaFacultad de Ciencias BiologicasCiudad UniversitariaSan Nicolas de los GarzaMexico

Marine Priority Region No. 33 (MPR 33) lies in the State of Guerrero, where the National Commission for Knowledge and Use of Biodiversity has declared a lack of information on marine species, Class POLYPLACOPHORA among others. This program was carried out on the rocky intertidal zone of MPR 33 with the objectives to: 1) determine species richness, 2) community composition based on families represented, 3) estimate the density, 4) index of diversity, 5) analyze body proportions and 6) geographic distribution of species. Three surveys on five sites were conducted during 2009 and 2012, using one mt2 quadrant for systematic sampling procedure;collecting all POLYPLACOPHORA specimens found within the quadrants, then proceeding with their preservation. 441 organisms were analyzed where 17 species were identified, on nine genera within six families. fifteen new species were recorded for the MPR 33. family ISCHNOCHITONIDAE Dall, 1889 was the best represented in species richness and CHITONIDAE Rafinesque, 1815 in abundance. Density of 8.82 organisms/m2, the H′ index was 2.38 bits/individuals and J′ = 0.57. The species Chiton (Chiton) articulatus Sowerby, 1832 showed the highest density, greater size and was found in all five collection sites. Three species, (Chiton (C.) articulatus, Ischnochiton (Ischnochiton) muscarius (Reeve, 1847) and Chiton (Chiton) alboli-neatus Broderip & Sowerby, 1829), were considered wide. Intertidal species richness was associated with habitat stability and wave intensity;the more unstable sites had greater richness while most stable sites lower. Species inventory and understanding the communities’ interactions of the marine fauna of the State of Guerrero are important;therefore these efforts must be continued.

关键词： Polyplacophora New Records Methodology RMP 33 Guerrero

Why ‘the uplift of the Tibetan Plateau’ is a myth

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National Science Review 2021年第1期8卷 156-174页

作者： Robert A.Spicer Tao Su Paul J.valdes Alexander farnsworth fei-Xiang Wu Gongle Shi Teresa E.V.Spicer Zhekun Zhou CAS Key Laboratory of Tropical forest Ecology Xishuangbanna Tropical Botanical Garden Chinese Academy of Sciences Center of Plant Ecology Core Botanical GardensChinese Academy of Sciences School of Environment Earth and Ecosystem Sciences The Open University School of Geographical Sciences University of Bristol Key Laboratory of Vertebrate Evolution and Human Origins Institute of Vertebrate Paleontology and PaleoanthropologyChinese Academy of Sciences State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and PaleoenvironmentChinese Academy of Sciences

The often-used phrase ‘the uplift of the Tibetan Plateau’ implies a flat-surfaced Tibet rose as a coherent entity, and that uplift was driven entirely by the collision and northward movement of India. Here, we argue that these are misconceptions derived in large part from simplistic geodynamic and climate modeling, as well as proxy misinterpretation. The growth of Tibet was a complex process involving mostly Mesozoic collisions of several Gondwanan terranes with Asia, thickening the crust and generating complex relief before the arrival of India. In this review, Earth system modeling, paleoaltimetry proxies and fossil finds contribute to a new synthetic view of the topographic evolution of Tibet. A notable feature overlooked in previous models of plateau formation was the persistence through much of the Cenozoic of a wide east–west orientated deep central valley, and the formation of a plateau occurred only in the late Neogene through compression and internal sedimentation.

关键词： Tibet paleoaltimetry paleogeography paleontology Himalaya

Polyplacophora species richness,composition and distribution of its community associated with the intertidal rocky substrate in the marine priority region No.32 in Guerrero,Mexico

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Open Journal of Ecology 2012年第4期2卷 192-201页

作者： Rafael flores-Garza Lizeth Galeana-Rebolledo Adriana reyes-Gomez Sergio Garcia Ibanez Carmina Torreblanca-Ramirez Pedro flores-Rodriguez y Arcadio valdes Gonzalez Unidad Academica de Ecologia Marina Laboratorio de Ecologia Costera y SustentabilidadFraccionamiento Las PlayasAcapulcoMexico Doctorado en Ciencias Ambientales Unidad de Ciencias de Desarrollo RegionalUniversidad Autonoma de Guerrero.Calle Pino s/n Colonia El Roble AcapulcoAcapulcoMexico

The coast of Acapulco is located within the Marine Priority Region No. 32 (MPR No. 32) at the State of Guerrero, Mexico. The National Commission for the Knowledge and Use of Biodiversity has stated the lack of information on marine species that live there, among which are the Class Polyplacophora. This study aimed to: 1) determine species richness, 2) the community structure based on the representative families, 3) estimate the density, 4) locate species distribution, 5) determine their degree of occurrence (hierarchical position) within the community, 6) analyze the structure of length and width across the populations and 7) estimate the diversity index. The intertidal rocky substrate at seven beaches was sampled from 2009 to 2012. The sampling unit 1 m2, while the area sampled was 10 m2. It was analyzed 2.548 specimens of Polyplacophora, with 20 species identified. Tonicellidae and Ischnochitonidae were the families better represented inspecies richness and Chitonidae in abundance. Lepidochitona flectens is a new record for the Mexican Tropical Pacific and Stenoplax mariposa for MPR. No. 32. The density was 25.48 specimens/m2. Eight dominant species were determined. Chiton albolineatus had the highest density. Ischnochiton muscarius, Chaetopleura unilineata, Chiton albolineatus and Chiton articulatus presented wide distribution. Chiton articulatus showed the largest size in length and width. H’ = 2.01 bits/ individual. Numerous dominant species were present with broad and regular distribution, probably due to Polyplacophora body design, which allows for better adaptation to the rigorous environmental conditions of the rocky intertidal.

关键词： Polyplacophora Species Richness Distribution Sizes

Synthesis of Hydrothermally Grown Zinc Oxide Nanowires

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Journal of Chemistry and Chemical Engineering 2012年第1期6卷 61-64页

作者： Concepcioen Mejia-Garcia Elvia Diaz-valdes Gerardo Ortega-Cervantes Esteban Basurto-Cazares Departamento de fisica Escuela Superior de Fisica y Matematicas de Instituto Politecnico Nacional Unidad Adolfo Lopez MateosMexico D. F. 07738 Mexico

We report the synthesis ofZnO nanowires grown on glass by spin coating and using a commercial microwave oven. 10 mM solutions of zinc acetate dehydrate and 12propanol were spin coated on glass at 2000 rpm for 60 s. A seed layer was obtained after three layers of spin coating. Vertical ZnO nanowires were then grown by dipping the substrate in an equimolar solution of zinc nitrate hexahydrate and hexamethylenetetramine subsequently, films were heated with a commercially microwave oven at different power settings （140, 350 and 700 W）. The ZnO nanowires were characterized optically and morphologically. Scanning electron microscopy analysis showed that the size of ZnO nanowires was 50 nm in diameter and 500 nm in length. XRD patterns and IR spectra revealed the presence of Zn（OH）2 on the films, when low power in the microwave oven was utilized. The ZnO nanowires bandgap energy was obtained from optical transmission spectra.

关键词： ZnO nanowires Scanning Electron Microscopy X-Ray Diffraction IR optical transmission.

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老年人的营养和肠道微生物群

老年人的营养和肠道微生物群

Time-expanded phase-sensitive optical time-domain reflectometry

作者： Nuria Salazar Lorena valdes-Varela Sonia Gonzalez Miguel Gueimonde Clara G.de los reyes-Gavilan 白慧婧赵燕芳复旦大学附属华东医院临床营养中心

肠道微生物群是生活在我们肠道中的微生物的集合,它们的基因组被称为微生物组。这种微生物群的正确组成和功能对于保持"健康状态"是必不可少的。衰老与肠道微生物群的变化有关,肠道微生物群的变化常常与胃肠道的生理改变有关,也与饮食...

肠道微生物群是生活在我们肠道中的微生物的集合,它们的基因组被称为微生物组。这种微生物群的正确组成和功能对于保持"健康状态"是必不可少的。衰老与肠道微生物群的变化有关,肠道微生物群的变化常常与胃肠道的生理改变有关,也与饮食模式的改变有关,并且伴随着认知和免疫功能的下降,这些都是造成虚弱的原因。因此,旨在恢复老年人微生物群的营养战略必须从全局出发,不仅要考虑微生物群,而且要考虑其他肠道外的作用靶点。本综述旨在总结老年人肠道微生物群改变和其他功能受损的最新知识,并通过使用益生菌、益生元或特定营养素来分析实施营养策略的工具,以平衡这些变化。老年人的疾病和功能损害和肠道微生物的变化密切相关,营养影响微生物群的形成;因此,提高对老年人中营养与肠道菌群结构和功能之间相互作用的认识,可以通过设计个性化营养策略来帮助改善老年人群的总体健康状况。

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来源： cnki会议评论

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Light(Science & Applications) 2021年第3期10卷 443-454页

作者： Miguel Soriano-Amat Hugo f.Martins Vicente Duran Luis Costa Sonia Martin-Lopez Miguel Gonzalez-Herraez Maria R.fernandez-Ruiz Departamento de Electronica Universidad de AlcalaEscuela Politecnica Superior28805 MadridSpain Instituto deóptica"Daza de valdes" IO-CSICC/Serrano 12128006 MadridSpain GROC-UJI Institute of New Imaging TechnologiesUniversity Jaume112071 CastellonSpain

Phase-sensitive optical time-domain reflectometry(CDOTDR)is a well-established technique that provides spatiotemporal measurements of an environmental variable in real *** unique capability is being leveraged in an everincreasing number of applications,from energy transportation or civil security to *** date,a wide number of different approaches have been implemented,providing a plethora of options in terms of performance(resolution,acquisition bandwidth,sensitivity or range).However,to achieve high spatial resolutions,detection bandwidths in the GHz range are typically required,substantially increasing the system cost and ***,we present a novel OOTDR approach that allows a customized time expansion of the received optical ***,the presented technique reaches cm-scale spatial resolutions over t km while requiring a remarkably low detection bandwidth in the MHz *** approach relies on the use of dual-comb spectrometry to interrogate the fibre and sample the backscattered *** phase-spectral coding is applied to the employed combs to maximize the signal-to-noise ratio of the sensing scheme.A comparison of the proposed method with alternative approaches aimed at similar operation features is provided,along with a thorough analysis of the new *** results demonstrate a radically novel high-resolution OOTDR scheme,which could promote new applications in metrology,borehole monitoring or aerospace.

关键词： optical phase expanded

术前经血糖校正的SUVmax对非小细胞肺癌患者术后5年预后的预测价值

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中华核医学与分子影像杂志 2017年第7期37卷 443-444页

作者：唐军 Renske Konings Matthijs H.van Gool Martin P.L.Bard Anthonie Zwijnenburg Bart M.Titulaer Tjeerd S.Aukema Renato A.valdes Olmos Karolina Sikorska Houke M.Klomp Herman Rijna 苏州大学附属第二医院核医学科 Department of Surgery Spaarne Gasthuis Department of Surgical Oncology the Netherlands Cancer Institute-Antoni van Leeuwenhoek Hospital

目的评估术前经血糖水平校正的最大标准吸收值(GC-SUVmax)在预测早期非小细胞肺癌（NSCLC）患者手术后预后中的价值。方法该回顾性研究的患者入组标准是:组织学证实是TNM分期为I期的NSCLC患者,术前行18f-fDG PET/CT显像,手术切除病灶并... 详细信息

目的评估术前经血糖水平校正的最大标准吸收值(GC-SUVmax)在预测早期非小细胞肺癌（NSCLC）患者手术后预后中的价值。方法该回顾性研究的患者入组标准是:组织学证实是TNM分期为I期的NSCLC患者,术前行18f-fDG PET/CT显像,手术切除病灶并在门诊随访。排除标准是:患者患有除NSCLC以外的其他恶性肿瘤、糖尿病或使用过新辅助疗法。随访期是术后5年。结果 2006年至2008年间共33例患者（男16例,女17例）符合入组标准,其SUVmax和GC-SUVmax有显著相关性（ρ=0.97）。5年总体生存率是70%（95%CI:56%87%）。5年内死亡患者的GC-SUVmax[10.6（8.3,14.4）]显著高于5年内未死亡患者的GC-SUVmax[6.4（3.0,9.8）,P=0.04]。两者SUVmax的差异也有统计学意义[10.4（8.0,12.9）和6.6（3.0,8.8）,P=0.047]。第5年GC-SUVmax的ROC曲线下面积是0.70（95%CI:0.50～0.90）,而第5年SUVmax的ROC曲线下面积是0.71（95%CI:0.51～0.91）,P=0.75。结论 NSCLC患者术前肿瘤对fDG的摄取可预测术后的存活情况。GC-SUVmax作为SUVmax的校正值,可以更好地避免血糖对肿瘤fDG摄取的影响。但是,该研究中即便存在这种影响,其效果也很小。

关键词： PET/CT 预后非小细胞肺癌手术早期

Performance and calibration of quark/gluon-jet taggers using 140 fb^(-1) of pp collisions at √s=13 TeV with the ATLAS detector

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Chinese Physics C 2024年第2期48卷 1-25页

作者： G. Aad B. Abbott K. Abeling N.J. Abicht S.H. Abidi A. Aboulhorma H. Abramowicz H. Abreu Y. Abulaiti B.S. Acharya C. Adam Bourdarios L. Adamczyk S.V. Addepalli M.J. Addison J. Adelman A. Adiguzel T. Adye A.A. Affolder Y. Afik M.N. Agaras J. Agarwala A. Aggarwal C. Agheorghiesei A. Ahmad f. Ahmadov W.S. Ahmed S. Ahuja X. Ai G. Aielli A. Aikot M. Ait Tamlihat B. Aitbenchikh I. Aizenberg M. Akbiyik T.P.A. Åkesson A.V. Akimov D. Akiyama N.N. Akolkar K. Al Khoury G.L. Alberghi J. Albert P. Albicocco G.L. Albouy S. Alderweireldt M. Aleksa I.N. Aleksandrov C. Alexa T. Alexopoulos f. Alfonsi M. Algren M. Alhroob B. Ali H.M.J. Ali S. Ali S.W. Alibocus M. Aliev G. Alimonti W. Alkakhi C. Allaire B.M.M. Allbrooke J.f. Allen C.A. Allendes flores P.P. Allport A. Aloisio f. Alonso C. Alpigiani M. Alvarez Estevez A. Alvarez fernandez M. Alves Cardoso M.G. Alviggi M. Aly Y. Amaral Coutinho A. Ambler C. Amelung M. Amerl C.G. Ames D. Amidei S.P. Amor Dos Santos K.R. Amos V. Ananiev C. Anastopoulos T. Andeen J.K. Anders S.Y. Andrean A. Andreazza S. Angelidakis A. Angerami A.V. Anisenkov A. Annovi C. Antel M.T. Anthony E. Antipov M. Antonelli f. Anulli M. Aoki T. Aoki J.A. Aparisi Pozo M.A. Aparo L. Aperio Bella C. Appelt A. Apyan N. Aranzabal S.J. Arbiol Val C. Arcangeletti A.T.H. Arce E. Arena J-f. Arguin S. Argyropoulos J.-H. Arling O. Arnaez H. Arnold G. Artoni H. Asada K. Asai S. Asai N.A. Asbah J. Assahsah K. Assamagan R. Astalos S. Atashi R.J. Atkin M. Atkinson H. Atmani P.A. Atmasiddha K. Augsten S. Auricchio A.D. Auriol V.A. Austrup G. Avolio K. Axiotis G. Azuelos D. Babal H. Bachacou K. Bachas A. Bachiu f. Backman A. Badea P. Bagnaia M. Bahmani A.J. Bailey V.R. Bailey J.T. Baines L. Baines O.K. Baker E. Bakos D. Bakshi Gupta V. Balakrishnan R. Balasubramanian E.M. Baldin P. Balek E. Ballabene f. Balli L.M. Baltes W.K. Balunas J. Balz E. Banas M. Bandieramonte A. Bandyopadhyay S. Bansal L. Barak M. Barakat E.L. Barberio D. Barberis M. Barbero M.Z. Barel K.N. Barends T. Barillari M-S. Barisits T. Barklow P. Baron D.A. Baron Mo The ATLAS Collaboration

The identification of jets originating from quarks and gluons,often referred to as quark/gluon tagging,plays an important role in various analyses performed at the Large Hadron Collider,as Standard Model measurements and searches for new particles decaying to quarks often rely on suppressing a large gluon-induced *** paper describes the measurement of the efficiencies of quark/gluon taggers developed within the ATLAS Collaboration,using √s=13 TeV proton–proton collision data with an integrated luminosity of 140 fb^(-1) collected by the ATLAS *** taggers with high performances in rejecting jets from gluon over jets from quarks are studied:one tagger is based on requirements on the number of inner-detector tracks associated with the jet,and the other combines several jet substructure observables using a boosted decision tree.A method is established to determine the quark/gluon fraction in data,by using quark/gluon-enriched subsamples defined by the jet *** in tagging efficiency between data and simulation are provided for jets with transverse momentum between 500 GeV and 2 TeV and for multiple tagger working points.

关键词： ATLAS JET QUARK GLUON TAGGING