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Synthesis of coral-like structures of pr-Yb co-doped YIG: Structural,optical, magnetic and antimicrobial properties

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Journal of Rare Earths 2024年第3期42卷 543-554,I0004页

作者： A.Fernandez Francisca p.Araujo Y.Guerra S.castro-lopes J.Matilla-Arias Idglan S.de Lima Edson c.Silva-Filho Josy A.Osajima F.Guerrero R.pena-Garcia Federal University of piau Graduate Program in Materials Science and EngineeringTeresinaPIBrazil Federal Rural University of pernambuco Academic Unit of Cabo de Santo AgostinhoCabo de Santo AgostinhoPEBrazil Federal University of piaui Department of PhysicTeresinaPBrazil Federal University of pernambuco Graduate Program in Materials ScienceRecifePEBrazil University of Granma Departmentof Basic Sciences and Applied InformaticsFaculty of Technical SciencesBayamoCuba Federal University of Amazonas Department of PhysicManausAMBrazil Federal University of pernambuco Department of PhysicRecifePEBrazil

coral-like structures of the Y_(3-x)pr_(x)Fe_(5-y)Yb_(y)O_(12),(0.00 ≤ x ≤ 0.04, 0.00 ≤ y ≤ 0.02) compound were synthesized using the sol-gel method. Structural investigation certified the YIG cubic crystal structure formation, without any secondary phase. It is shown that, the relatively large ionic radius of the dopant cations results in an expansion of the lattice parameter, variations in the Iona-O-Iondangle, Iona-O,Iond-O and Ionc-O bond distances and decrease in the average crystallite size. Fourier transform infrared(FTIR) and Raman measurements are essential to testify the single-phase formation of YIG crystal structure and are observed changes in the stretching and vibrational modes, respectively. The morphological study, energy dispersive spectroscopy(EDS) spectra and textural properties show corallike structures, peaks associated with pr^(3+) and Yb^(3+) atoms and the effect of dopants on surface area,diameter, and pore volume, respectively. The optical analysis from diffuse reflectance spectra witnessed an increase in the optical gap band, a decrease in Urbach energy and blue shift in the charge transfer,correlated with the expansion of the unit cell due to the dopant's insertion in the YIG structure. A typical ferrimagnetic behavior is exhibited by the Y_(3-x)pr_(x)Fe_(5-y)Yb_(y)O_(12)compound. The saturation magnetization(M_(s)), cubic anisotropy constant(K_(1)) and coercive field(H_(c)) increase with the pr^(3+)cations content, as consequence of their magnetic nature and distribution around of Fe^(3+)ions due to the coexistence with the Yb^(3+). Finally, for the first time, antibacterial tests by mean of the direct contact method were performed for YIG co-doped with pr^(3+)and Yb^(3+)and it is shown that, relatively high dosages of pr^(3+) cations favored the activity against S. aureus, therefore, a new biological property for YIG doped with rare earths is presented.

关键词： Yttrium iron garnet(YIG) coral-like structures Rare earths Band gap energy Magnetic properties Antimicrobial properties

planar matrices and arrays of Feynman diagrams

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communications in Theoretical physics 2024年第3期76卷 15-32页

作者： Freddy cachazo Alfredo Guevara bruno Umbert Yong Zhang perimeter Institute for Theoretical physics WaterlooON N2L 2Y5Canada Department of physics and Astronomy University of WaterlooWaterlooON N2L 3G1Canada cEcs Valdivia y Departamento de Física Universidad de ConcepciónCasilla 160-CConcepciónChile center for the Fundamental Laws of Nature Society of Fellows and Black Hole InitiativeHarvard UniversityCambridgeMA 02138United States of America Department of Applied Mathematics Western UniversityLondonON N6A 5B7Canada cAS Key Laboratory of Theoretical physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of physical Sciences University of Chinese Academy of SciencesNo.19A Yuquan RoadBeijing 100049China

Recently,planar collections of Feynman diagrams were proposed by Borges and one of the authors as the natural generalization of Feynman diagrams for the computation of k=3 biadjoint *** collections are one-dimensional arrays of metric trees satisfying an induced planarity and compatibility *** this work,we introduce planar matrices of Feynman diagrams as the objects that compute k=4 biadjoint *** are symmetric matrices of metric trees satisfying compatibility *** introduce two notions of combinatorial bootstrap techniques for finding collections from Feynman diagrams and matrices from *** applications of the first,we find all 693,13612 and 346710 collections for(k,n)=(3,7),(3,8)and(3,9),*** applications of the second kind,we find all90608 and 30659424 planar matrices that compute(k,n)=(4,8)and(4,9)biadjoint amplitudes,*** an example of the evaluation of matrices of Feynman diagrams,we present the complete form of the(4,8)and(4,9)biadjoint *** also start a study of higher-dimensional arrays of Feynman diagrams,including the combinatorial version of the duality between(k,n)and(n-k,n)objects.

关键词： Feynman diagrams biadjoint amplitudes tropical Grassmannian

There is more to the knee joint than just the quadriceps:A systematic review with meta-analysis and evidence gap map of hamstring strength,flexibility,and morphology in individuals with gradual-onset knee disorders

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Journal of Sport and Health Science 2024年第4期13卷 521-536页

作者： Helder S.lopes Marina c.Waiteman Liliam B.priore Neal R.Glaviano David M.Bazett-Jones Ronaldo V.Briani Fabio M.Azevedo School of Science and Technology Physical Therapy DepartmentSao Paulo State University(UNESP)Presidente Prudente 19060-900Brazil Department of Kinesiology College of AgricultureHealth and Natural ResourcesUniversity of ConnecticutStorrsCT 06269USA School of Exercise and Rehabilitation Sciences College of Health and Human ServicesUniversity of ToledoToledoOH 43606USA

Background:Impairments in hamstring strength,flexibility,and morphology have been associated with altered knee biomechanics,pain,and *** the presence of these impairments in individuals with gradual-onset knee disorders is important and may indicate targets for assessment and *** systematic review aimed to synthesize the literature to determine the presence of impairments in hamstring strength,flexibility,and morphology in individuals with gradual-onset knee ***:Five databases(MEDLINE,Embase,cINAHL,SpORTDiscus,and Web of Science)were searched from inception to September *** studies comparing hamstring outcomes(e.g.,strength,flexibility,and/or morphology)between individuals with gradual-onset knee disorders and their unaffected limbs or pain-free controls were ***-analyses for each knee disorder were ***-level certainty was assessed using the Grading of Recommendations Assessment,Development,and Evaluation,and evidence gap maps were ***:Seventy-nine studies across 4 different gradual-onset knee disorders(i.e.,knee osteoarthritis(OA),patellofemoral pain(pFp),chondromalacia patellae,and patellar tendinopathy)were *** with knee OA presented with reduced hamstring strength compared to pain-free controls during isometric(standard mean difference(SMD)=-0.76,95%confidence interval(95%cI):-1.32 to-0.21)and concentric contractions(SMD=-0.97,95%cI:-1.49 to-0.45).Individuals with pFp presented with reduced hamstring strength compared to painfree controls during isometric(SMD=-0.48,95%cI:-0.82 to-0.14),concentric(SMD=-1.07,95%cI:-2.08 to-0.06),and eccentric contractions(SMD=-0.59,95%cI:-0.97 to-0.21).No differences were observed in individuals with patellar *** with pFp presented with reduced hamstring flexibility when compared to pain-free controls(SMD=-0.76,95%cI:-1.15 to-0.36).Evidence gap maps identified insufficient evidence for chondromalacia patel

关键词： chondromalacia patellae Knee flexors Knee osteoarthritis patellar tendinopathy patellofemoral pain

Renewable polymers in Biomedical Applications:From the Bench to the Market

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Journal of Renewable Materials 2024年第4期12卷 643-666页

作者： Rauany cristina lopes Tamires Nossa Wilton Rogério Lustri Gabriel Lombardo Maria Inés Errea Eliane Trovatti Department of Health and Biological Sciences University of Araraquara—UNIARAAraraquara14801-340Brazil Laboratory of Materials(LabMat)and Laboratory of Biopolymers(LaBiopol) Federal Institute of EducationScience and Technology of São Paulo Campus Itapetininga(IFSP)Itapetininga18.202‑000Brazil Instituto Tecnológico de Buenos Aires Cidade Autônoma de Buenos AiresC1437FBCArgentina conselho Nacional de pesquisas científicas e Técnicas(cONIcET) Cidade Autônoma de Buenos AiresC1425FQBArgentina Tecnologia YpF(Y-TEc) BerissoBuenos Aires1923Argentina

polymers from renewable resources have been used for a long time in biomedical applications and found an irreplaceable role in some of *** uses have been increasing because of their attractive properties,contributing to the improvement of life quality,mainly in drug release systems and in regenerative *** using natural polymer,nano and microscale particles preparation,composites,blends and chemical modification strategies have been used to improve their properties for clinical *** many studies have been carried out with these natural polymers,the way to reach the market is long and only very few of them become commercially *** cellulose,bacterial cellulose,chitosan,poly(lactic acid)and starch can be found among the most studied polymers for biological applications,some with several derivatives already established in the market,and others with potential for *** this scenario this work aims to describe the properties and potential of these renewable polymers for biomedical applications,the routes from the bench to the market,and the perspectives for future developments.

关键词： polymers renewable biomedical applications market

Effect of resistance training volume on body adiposity,metabolic risk,and inflammation in postmenopausal and older females:Systematic review and meta-analysis of randomized controlled trials

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Journal of Sport and Health Science 2024年第2期13卷 145-159页

作者： paulo Ricardo prado Nunes pamela castro-e-Souza Anselmo Alves de Oliveira bruno de Freitas camilo Gislaine cristina-Souza Lucio Marques Vieira-Souza Marcelo Augusto da Silva carneiro Department of Body and Human Movement Minas Gerais State University(UEMG)37902-092 PassosMGBrazil University center of planalto de Araxa(UNIARAXA) 38180-129 AraxaMGBrazil physical Activity Health and Ageing Research Group(GPASE)Minas Gerais State University(UEMG)37902-092 PassosMGBrazil Exercise and Nutrition Research Group(GpEN) Minas Gerais State University(UEMG)37902-092 PassosMGBrazil Sport Sciences and physical Exercise Study and Research Group(GEpcEEX) Minas Gerais State University(UEMG)37902-092 PassosMGBrazil Metabolism Nutrition and Exercise LaboratoryPhysical Education and Sport CenterLondrina State University(UEL)86050-070 LondrinaPRBrazil postgraduate program in physical Education Federal University of Sergipe(UFS)49107-230 Sao CristovaoSEBrazil

purpose:This meta-analytical study aimed to explore the effects of resistance training(RT) volume on body adiposity,metabolic risk,and inflammation in postmenopausal and older ***:A systematic search was performed for randomized controlled trials in pubMed,Scopus,Web of Science,and *** controlled trials with postmenopausal and older females that compared RT effects on body adiposity,metabolic risk,and inflammation with a control group(cG) were *** reviewers selected the studies,extracted the data,and performed the risk of bias and certainty of the evidence(Grading of Recommendations,Assessment,Development,and Evaluation(GRADE)) *** body and abdominal adiposity,blood lipids,glucose,and c-reactive protein were included for meta-analysis.A random-effects model,standardized mean difference(Hedges’ g),and 95% confidence interval(95%cI) were used for ***:Twenty randomized controlled trials(overall risk of bias:some concerns;GRADE:low to very low) with overweight/obese postmenopausal and older females were *** groups were divided into low-volume RT(LVRT,~44 sets/week) and high-volume RT(HVRT,~77 sets/week).Both RT groups presented improved body adiposity,metabolic risk,and inflammation when compared to ***,HVRT demonstrated higher effect sizes than LVRT for glucose(HVRT=-1.19;95%cI:-1.63 to-0.74;LVRT=-0.78;95%cI:-1.15 to-0.41) and c-reactive protein(HVRT=-1.00;95%cI:-1.32 to-0.67;LVRT=-0.34;95%cI,-0.63 to-0.04)) when compared to ***:compared to cG,HVRT protocols elicit greater improvements in metabolic risk and inflammation outcomes than LVRT in overweight/obese postmenopausal and older females.

关键词： c-reactive protein Fat mass Lipid profile Menopause Strength training

The effectiveness of different wear indicators in quantifying wear on railway wheels of freight wagons

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Railway Engineering Science 2024年第3期32卷 307-323页

作者： philipe Augusto de paula pacheco M.Magelli Matheus Valente lopes pedro Henrique Alves correa N.Zampieri N.Bosso Auteliano Antunes dos Santos Federal Institute of the Southeast of Minas Gerais(IF Sudeste MG) Técnico PanamáStreet 45Santos DumontMG 36246-311Brazil Railway Laboratory(Lafer) Universidade Estadual de Campinas(UNICAMP)Mendeleyev Street 200CampinasSP 13083-872Brazil Department of Mechanical and Aerospace Engineering Politecnico Di TorinoC.so Duca degli Abruzzi 2410129 TurinItaly

Railway infrastructure relies on the dynamic interaction between wheels and rails;thus,assessing wheel wear is a critical aspect of maintenance and *** paper focuses on the wheel-rail wear indicator T-gamma(Tγ).Amidst its use,it becomes apparent that Tγ,while valuable,fails to provide a comprehensive reflection of the actual material removal and actual contact format,which means that using only Tγas a target for optimization of profiles is not *** this work,three different freight wagons are evaluated:a meter-gauge and a broad-gauge heavy haul vehicles from South American railways,and a standard-gauge freight vehicle operated in Europe,with different axle loads and dissimilar new wheel/rail *** vehicles are subjected to comprehensive multibody simulations on various *** simulations aimed to elucidate the intricate relationship between different wear indicators:Tγ,wear index,material removal,and maximum wear depth,under diverse curves,non-compensated lateral accelerations(A_(nc)),and *** findings showed a correlation of 0.96 between Tγand wear depth and 0.82 between wear index and material removed for the outer *** the results,the Tγis better than the wear index to be used when analyzing wear depth while the wear index is more suited to foresee the material *** results also show the low influence of A_(nc)on wear index and Tγ.By considering these factors together,the study aims to improve the understanding of wheel-rail wear by selecting the best wear analysis approaches based on the effectiveness of each parameter.

关键词： Wear index Wear volume Wear modeling Dynamic simulation

protective effect of long-chain polyunsaturated fatty acids on hepatorenal syndrome in rats

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World Journal of Nephrology 2024年第3期13卷 49-61页

作者： João bruno Beretta Duailibe cassiana Macagnan Viau Jenifer Saffi Sabrina Alves Fernandes Marilene porawski Department of Hepatology Federal University of Health Sciences of Porto AlegrePorto Alegre 90050-170Brazil Department of Basic Health Sciences Federal University of Health Sciences of Porto AlegrePorto Alegre 90050-170Brazil Department of Hepatology and Basic Health Sciences Federal University of Health Sciences of Porto AlegrePorto Alegre 90050-170Brazil

BAcKGROUND Hepatorenal syndrome(HRS)is the most prevalent form of acute kidney injury in cirrhotic *** is characterized by reduced renal blood flow and represents the most severe complication in cirrhotic patients with advanced *** research has indicated that antioxidants can delay the onset of a hyperdynamic circulatory state in cirrhosis and improve renal function in HRS *** omega-3 supplementation has significantly reduced the risk of liver *** supplementation could represent an additional therapy for individuals with *** To evaluated the antioxidant effect of omega-3 polyunsaturated fatty acid supplementation on the kidneys of cirrhotic *** Secondary biliary cirrhosis was induced in rats by biliary duct ligation(BDL)for 28 *** used 24 male Wistar rats divided into the following groups:I(control);II(treated with omega-3,1 g/kg of body weight);III(BDL treated with omega-3,1 g/kg of body weight);and IV(BDL without treatment).The animals were killed by overdose of anesthetic;the kidneys were dissected,removed,frozen in liquid nitrogen,and stored in a freezer at-80℃for later *** evaluated oxidative stress,nitric oxide(NO)metabolites,DNA damage by the comet assay,cell viability test,and apoptosis in the *** were analyzed by one-way analysis of variance,and means were compared using the Tukey test,with p≤*** Omega-3 significantly decreased the production of reactive oxygen species(ppoperoxidation in the kidneys of cirrhotic rats treated with omega-3(pctivity of the antioxidant enzymes superoxide dismutase and catalase increased in the BDL+omega-3 group compared to the BDL group(pproduction,DNA damage,and caspase-9 cleavage decreased significantly in the omega-3-treated BDL *** was an increase in mitochondrial electrochemical potential(pcompared to *** changes in the cell survival index in HRS with omega-3 c

关键词： Long-chain polyunsaturated fatty acids Antioxidant effect Hepatorenal syndrome Liver cirrhosis Reactive oxygen species Apoptosis

Liver transplantation as an alternative for the treatment of perihilar cholangiocarcinoma: A critical review

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Hepatobiliary & pancreatic Diseases International 2024年第2期23卷 139-145页

作者： Wellington Andraus Francisco Tustumi Alexandre chagas Santana Rafael Soares Nunes pinheiro Daniel Reis Waisberg Liliana Ducatti lopes Rubens Macedo Arantes Vinicius Rocha Santos Rodrigo Bronze de Martino Luiz Augusto carneiro D’Albuquerque Department of Gastroenterology Transplantation UnitUniversidade de São PauloSão PauloBrazil

Background:perihilar cholangiocarcinoma(phccc)is a dismal *** is no consensus regard-ing the best treatment for patients with unresectable *** present review aimed to gather the current pieces of evidence for liver transplantation and liver resection as a treatment for phccc and to build better guidance for clinical *** sources:The search was conducted in pubMed,Embase,cochrane,and *** related references were searched *** criteria were:reports in English or portuguese literature that a)patients with confirmed diagnosis of phccc;b)patients treated with a curative intent;c)patients with the outcomes of liver resection and liver *** reports,reviews,letters,editorials,conference abstracts and papers with full-text unavailability were excluded from the ***:Most of the current literature is based on observational retrospective studies with low grades of *** resection has better long-term outcomes than systemic chemotherapy or palliation ther-apy and liver transplantation is a good alternative for selected patients with unresectable *** candidates for resection or transplantation should be medically fit and free of intrahepatic or extrahep-atic *** a general rule,patients presenting with a tumor having a longitudinal size>3 cm or extending below the cystic duct,lymph node disease,confirmed extrahepatic dissemination;intraoper-atively diagnosed metastatic disease;a history of other malignancies within the last five years,and did not complete chemoradiation regimen and were medically unfit should not be considered for *** of these criteria should be individually *** transplantation or resection should only be considered in highly experienced hepatobiliary centers,and any decision-making must be based on a multidisciplinary ***:phccc is a complex condition with high *** therapies,including hepatec-tomy and liv

关键词： Liver transplantation cholangiocarcinoma Liver neoplasms

Driving factors behind multiple populations

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Science china(physics,Mechanics & Astronomy) 2024年第5期67卷 172-181页

作者： Ruoyun Huang Baitian Tang chengyuan Li Doug Geisler Mario Mateo Ying-Yi Song Holger Baumgardt Julio A.carballo-Bello Yue Wang Jundan Nie bruno Dias JoséG.Fernández-Trincado School of physics and Astronomy Sun Yat-sen UniversityZhuhai 519082China cSST Science center for the Guangdong-Hong Kong-Macao Greater Bay Area Zhuhai 519082China Departamento de Astronomía Universidad de ConcepcionConcepcionChile Instituto de Investigación Multidisciplinario en ciencia y Tecnología Universidad de La SerenaLa SerenaChile Departamento de Astronomía Facultad de CienciasUniversidad de La SerenaChile Department of Astronomy University of MichiganAnn Arbor 48109USA David A.Dunlap Department of Astronomy&Astrophysics University of TorontoToronto ON M5S 3H4Canada Dunlap Institute for Astronomy&Astrophysics University of TorontoToronto ON M5S 3H4Canada School of Mathematics and physics The University of QueenslandSt.Lucia QLD 4072Australia Instituto de Alta Investigación Universidad de TarapacáAricaChile cAS Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China Instituto de Astrofísica Departamento de Ciencias FísicasFacultad de Ciencias ExactasUniversidad Andres BelloSantiagoChile Instituto de Astronomía Universidad Católica del NorteAntofagastaChile

Star clusters were historically considered simple stellar populations,with all stars sharing the same age and initial chemical ***,the presence of chemical anomalies in globular clusters(Gcs),called multiple stellar populations(Mps),has challenged star formation theories in dense *** studies show that mass,metallicity,and age are likely controlling parameters for the manifestation of *** the limit between clusters with/without Mps in physical parameter space is crucial to reveal the driving mechanism behind their *** this study,we look for Mp signals in Whiting 1,which is traditionally considered a young *** the Magellan telescope,we obtained low-resolution spectra withinλλ=3850-5500?for eight giants of Whiting *** measured the c and N abundances from the cN and cH spectral indices.c and N abundances have variations comparable with their measurement errors(~0.1 dex),suggesting that Mps are absent from Whiting *** these findings with literature studies,we propose a limit in the metallicity *** compactness index parameter space,which relatively clearly separates star clusters with/without Mps(Gcs/open clusters).This limit is physically *** a larger scale,the galactic environment determines cluster compactness and metallicity,leading to metal-rich,diffuse,old clusters formed ex *** proposed limit also impacts our understanding of the formation of the Sagittarius dwarf galaxy:star clusters formed after the first starburst(age≤8-10 Gyr).These clusters are simple stellar populations because the enriched galactic environment is no longer suitable for Mp formation.

关键词： stellar galactic galaxy