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Chemical-Abrasion U-Pb zircon geochronology reveals 150 Myr of partial melting events in the Archean crust of the São Francisco Craton

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Geoscience Frontiers 2022年第5期13卷 169-189页

作者： Lorena martins Cristiano Lana Ariela Mazoz tiago Novo Applied Isotope Research Group Departamento de GeologiaEscola de MinasUniversidade Federal de Ouro PretoMorro do CruzeiroOuro PretoMG35400-000Brazil Universidade Federal de Minas Gerais Programa de Pós-Graduação em GeologiaIGC-CPMTCCampus PampulhaAv.Antônio Carlos 6627Belo HorizonteMG31270-901Brazil

Field observations and CA-LA-ICP-MS U–Pb zircon ages and Hf isotope compositions obtained from migmatitic orthogneisses and granitoids from the Belo Horizonte Complex,southern São Francisco Craton,indicate a major period of partial melting and production of felsic rocks in the *** observations show that the complex is an important site for studying partial melting processes of Archean crystalline *** of the complex exposes fine-grained stromatic migmatites that are intruded by multiple leucogranitic veins and sheeted *** migmatites and leucogranite sheets are crosscut by several phases of granitoid batholiths and small granitic bodies;both of which are closely associated with the host banded *** abrasion followed by detailed cathodoluminescence imaging revealed a wide variety of zircon textures that are consistent with a long-lived period of partial melting and crustal *** of U-Pb and Hf isotopes disclose the complex as part of a much wider crustal segment,encompassing the entire southern part of the São Francisco *** of available U-Pb ages suggests that this crustal segment was consolidated sometime between 3000 Ma and 2900 Ma and that it experienced three main episodes of partial melting before stabilization at 2600 *** partial melting episodes took place between 2750 Ma and 2600 Ma as a result of tectonic accretion and peeling off the lithospheric mantle and lower *** process is likely responsible for the emplacement of voluminous potassic granitoids across the entire São Francisco *** believe that the partial melting of Meso-Archean crystalline crust and production of potassic granitoids are linked to a fundamental shift in the tectonics of the craton,which was also responsible for the widespread intrusion of large syenitic bodies in the northern part of the craton,and the construction of layered mafic–ultramafic intrusions to the south of the BHC.

关键词： Archean São Francisco Craton Crustal reworking U-Pb geochronology Lu-Hf isotopes

Structural Optimization of Metal and Polymer Ore Conveyor Belt Rollers

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Computer Modeling in Engineering & Sciences 2022年第12期133卷 601-618页

作者： Joao Pedro Ceniz Rodrigo de Sá martins Marco Antonio Luersen tiago Cousseau Department of Mechanical Engineering Federal University of Technology-Parana(UTFPR)Curitiba81280-340Brazil

Ore conveyor belt rollers operate in harsh environments,making them prone to premature *** service lives are highly dependent on the stress field and bearing misalignment angle,for which limit values are defined in a *** this work,an optimization methodology using metamodels based on radial basis functions is implemented to reduce themass of twomodels of *** a structural point of view,one of the rollers ismade completely of metal,while the other also has some components made of polymeric *** objective of this study is to develop and apply a parametric structural optimization methodology to minimize the mass of the two models of *** represent the mechanical behavior of the rollers,simulations were performed using the finite element *** the numerical optimization process,the variable parameters were the dimensions of the shaft and external *** geometric configuration that corresponded at the same time to the lowest mass and acceptable ranges for the stress and bearingmisalignment angle was *** the proposed methodology,a 32.3% reduction in mass was obtained for a metal roller design and an 18.9% reduction for a polymer *** both cases,the constraints were not *** the all-metal roller,the safety factors for the maximum stress and bearingmisalignment angle were 1.44 and 1.75,respectively,while for the polymer roller the corresponding figures were 1.50 and *** work describes a low-computational-cost optimization methodology for roller designs that have been little studied in the ***,the methodology could be adapted for use with other types of rollers and rollers made of different materials.

关键词： Conveyor belt rollers structural optimization surrogate models radial basis functions

Vertical stratification of bat assemblages in flooded and unflooded Amazonian forests

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Current Zoology 2010年第4期56卷 469-478页

作者： Maria Joo Ramos pereira Joo tiago MARQUES Jorge M.PALMEIRIM Centro de Biologia Ambiental Departamento de Biologia Animal Faculdade de Ciências da Universidade de Lisboa Instituto de Desenvolvimento Sustentvel Mamirau

Tropical rainforests usually have multiple strata that results in a vertical stratification of ecological opportunities foranimals. We investigated if this stratification influences the way bats use the vertical space in flooded and unflooded forests of theCentral Amazon. Using mist-nets set in the canopy (17 to 35 m high) and in the understorey (0 to 3 m high) we sampled four sitesin upland unflooded forests (terra firme), three in forests seasonally flooded by nutrient-rich water (varzea), and three in forestsseasonally flooded by nutrient-poor water (igapo). Using rarefaction curves we found that species richness in the understorey andcanopy were very similar. An ordination analysis clearly separated the bat assemblages of the canopy from those of the understorey inboth flooded and unflooded habitats. Gleaning carnivores were clearly associated with the understorey, whereas frugivores wereabundant in both strata. Of the frugivores, Carollinae and some Stenodermatinae were understorey specialists, but several Stenodermatinaemostly used the canopy. The first group mainly includes species that, in general, feed on fruits of understorey shrubs,whereas the second group feed on figs and other canopy fruits. We conclude that vertical stratification in bat communities occurseven within forests with lower canopy heights, such as Amazonian seasonally flooded forests, and that the vertical distribution ofbat species is closely related to their diet and foraging behaviour.

关键词： Amazon Bats Chiroptera Vertical stratification Floodplain

Towards the automation of book typesetting

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Visual Informatics 2023年第2期7卷 1-12页

作者： Sérgio M.Rebelo tiago martins Diogo Ferreira Artur Rebelo University of Coimbra Centre for Informatics and Systems of the University of CoimbraDepartment of Informatics EngineeringCoimbraPortugal

This paper proposes a generative approach for the automatic typesetting of books in desktop *** presented system consists in a computer script that operates inside a widely used design software tool and implements a generative process based on several typographic rules,styles and principles which have been identified in the *** performance of the proposed system is tested through an experiment which included the evaluation of its outputs with *** results reveal the ability of the system to consistently create varied book designs from the same input content as well as visually coherent book designs with different contents while complying with fundamental typographic principles.

关键词： Design tools Data-driven design Generative design Graphic design Typography

How far have we come?Review of main public policies to reduce landslide impacts in Brazil

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Journal of Mountain Science 2024年第9期21卷 2891-2904页

作者： Bianca Carvalho VIEIRA tiago Damas martins Telma Mendes da SILVA JoséEduardo BONINI Department of Geography University of São PauloAvenida Professor Lineu Prestes 05508-000Brazil Cities Institute Federal University of São PauloAvenida Jacu-Pêssego 08260-001Brazil Department of Geography Federal University of Rio de JaneiroAvenida Athos da Silveira Ramos 21941-916Brazil

During the rainy season in Brazil,landslides can have catastrophic consequences,including loss of life,damage to urban infrastructure and significant economic ***,more than eight million people in Brazil live in disaster-prone *** objective of this article is to present a chronological review of the principal policies and programmes at the national,state,and municipal levels,with an emphasis on their key actions aimed at mitigating the impact of disasters related to natural hazards,particularly *** analysis was based on official records of public policies from the national,state,and municipal *** results show that several initiatives were initially developed at the local and regional ***,it was not until the late 1980s that a comprehensive organisation of civil protection at the national level emerged as a response *** is possible to highlight three phases(understanding,coexistence,and prevention)of institutional action focused on risk management in the face of *** the growing knowledge of risk scenarios,disasters continue to occur in Brazil on an annual basis,revealing several obstacles to reducing their impact,particularly given the social and economic disparities between Brazilian regions and the applicability of public policies that must overcome the limitations of each municipality.

关键词： Disasters Risk Mitigation Prevention Legislation Civil Defense Natural Hazards

Chemical characterisation of particulate matter in urban transport modes

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Journal of Environmental Sciences 2021年第2期33卷 51-61页

作者： Vania martins Carolina Correia Ines Cunha-Lopes tiago Faria Evangelia Diapouli Manousos Ioannis Manousakas Konstantinos Eleftheriadis Susana Marta Almeida Centro de Ciencias e Tecnologias N ucleares Instituto Superior TecnicoLisbonPortugal Institute of Nuclear and Radiological Sciences and Technology Energy and SafetyN.C.S.R.'Demokritos'AthensGreece

Traffic is a main source of air pollutants in urban areas and consequently daily peak exposures tend to occur during *** exposure to particulate matter(PM)was monitored while cycling and travelling by bus,car and metro along an assigned route in Lisbon(Portugal),focusing on PM_(2.5) and PM_(1)0(PM with aerodynamic diameter<2.5 and 10μm,respectively)mass concentrations and their chemical *** vehicles,the indoor-outdoor interplay was also *** PM_(2.5) mean concentrations were 28±5,31±9,34±9 and 38±21μg/m 3 for bus,bicycle,car and metro modes,*** carbon concentrations when travelling by car were 1.4 to 2.0 times higher than in the other transport modes due to the closer proximity to exhaust *** are marked differences in PM chemical composition depending on transport *** particular,Fe was the most abundant component of metro PM,derived from abrasion of rail-wheel-brake *** concentrations of Zn and Cu in cars and buses were related with brake and tyre wear particles,which can penetrate into the *** the motorised transport modes,Fe,Zn,Cu,Ni and K were correlated,evidencing their common traffic-related *** average,the highest inhaled dose of PM_(2.5) was observed while cycling(55μg),and the lowest in car travels(17μg).Cyclists inhaled higher doses of PM_(2.5) due to both higher inhalation rates and longer journey times,with a clear enrichment in mineral *** presented results evidence the importance of considering the transport mode in exposure assessment studies.

关键词： Traffic Commuting Air pollution Particle chemistry Indoor-outdoor interplay Inhaled dose

Effects of natural mineral-rich water consumption on the expression of sirtuin 1 and angiogenic factors in the erectile tissue of rats with fructose-induced metabolic syndrome

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Asian Journal of Andrology 2014年第4期16卷 631-638页

作者： Cidalia D pereira Milton Severo Luisa Rafael Maria Joao martins Delminda Neves Department of Biochemistry Faculty of Medicine University of Porto Department of Clinical Epidemiology Predictive Medicine and Public Health Faculty of Medicine University of Porto Department of Clinical Pathology Sao Joao Hospital Centre EPE Department of Experimental Biology Faculty of Medicine and Institute for Molecular and Cell Biology (IBMC) University of Porto Portugal.

Consuming a high-fructose diet induces metabolic syndrome （MS）-Iike features, including endothelial dysfunction. Erectile dysfunction is an early manifestation of endothelial dysfunction and systemic vascular disease. Because mineral deficiency intensifies the deleterious effects of fructose consumption and mineral ingestion is protective against MS, we aimed to characterize the effects of 8weeks of natural mineral-rich water consumption on the structural organization and expression of vascular growth factors and receptors on the corpus cavernosum （CC） in 10% fructose-fed Sprague-Dawley rats （FRUCT）. Differences were not observed in the organization of the CC either on the expression of vascular endothelial growth factor （VEGF） or the components of the angiopoietins/Tie2 system. However, opposing expression patterns were observed for VEGF receptors （an increase and a decrease for VEGFR1 and VEGFR2, respectively） in FRUCT animals, with these patterns being strengthened by mineral-rich water ingestion. Mineral-rich water ingestion （FRUCTMIN） increased the proportion of smooth muscle cells compared with FRUCT rats and induced an upregulatory tendency of sirtuin I expression compared with the control and FRUCT groups. Western blot results were consistent with the dual immunofluorescence evaluation. Plasma oxidized low-density lipoprotein and plasma testosterone levels were similar among the experimental groups, although a tendency for an increase in the former was observed in the FRUCTMIN group. The mineral-rich water-treated rats presented changes similar to those observed in rats treated with MS-protective polyphenol-rich beverages or subjected to energy restriction, which led us to hypothesize that the effects of mineral-rich water consumption may be more vast than those directly observed in this study.

关键词： angiopoietins erectile tissue hypersaline sodium-rich naturally sparkling mineral water receptors sirtuin 1 vascularendothelial growth factor

Combined grafts and flaps in urethral stricture repair

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Plastic and Aesthetic Research 2022年第1期9卷 213-224页

作者： Francisco Dávila tiago Rosito Borko Stojanovic Francisco E.martins Department of Urology Hospital de Clínicas de Porto AlegreUFRGSPorto Alegre 90035-903Brazil Department of Urology Belgrade Center for Urogenital Reconstructive SurgerySchool of MedicineUniversity of BelgradeBelgrade 11000Serbia Department of Urology School of MedicineUniversity of LisbonCHULNLisbon 1649-028Portugal

Although urethral strictures have been known since antiquity,the surgical management of urethral strictures has undergone a great(re)evolution over the last six decades,both in the perception of the disease and in the surgical repair techniques,always presenting itself as a challenge for the surgeon and *** of urethral stricture disease involving a combination of grafts and flaps consists of a group of complex procedures with specific clinical *** knowledge of these procedures by reconstructive urologists is both necessary and relevant.A thorough understanding of the anatomy,including blood supply,is a crucial proviso for the correct evaluation and successful management of urethral stricture *** discuss the main techniques and indications in combined graft and flap urethroplasties.

关键词： Urethral stricture urethral stenosis genital flap penile flap reconstructive urology combined urethral surgery

In vitro antileishmanial effects of Physalis angulata root extract on Leishmania infantum

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Journal of Integrative Medicine 2018年第6期16卷 404-410页

作者： Bruno Jose martins Da Silva Sandro Wilson Gomes pereira Ana Paula Drummond Rodrigues Jose Luiz martins Do Nascimento Edilene Oliveira Silva Laboratory of Structural Biology Institute of Biological SciencesFederal University of PardBelemPard 66075-110Brazil National Institute of Science and Technology in Structural Biology and Bioimaging(INCT-INBEB) Rio de Janeiro 21941-901Brazil Laboratory of Electron Microscopy Department of Health SurveillanceMinistry of HealthEvandro Chagas InstituteBelemPard 66087-082Brazil Laboratory of Molecular and Cellular Neurochemistry Institute of Biological SciencesFederal University of PardBelemPard 66075-110Brazil National Institute of Science and Technology in Neuroimmunomodulation(INCT-NIM) Rio de Janeiro 21040-360Brazil

Objective： In the present study, we evaluated the effects of the aqueous extract of Physalis angulata root （AEPa） on Leishmania infanturn proliferation, morphology, and the driving mechanism in leishmanicidal activity and modulatory action on macrophages. Methods： I., infantum promastigotes were treated with 50 and 100 μg/mL AEPa for 72 h and then antipro- mastigote assay was performed by counts in a Newbauer chamber, morphological changes were analyzed by transmission electron microscopy and the mechanism of the leishmanicidal activity was detected. In addition, macrophages were infected with L. infantum and were used to evaluate anti-amastigote activity of AEPa and effects of AEPa on cytokine secretion after 72-hour treatment. Results： Treatment with AEPa reduced the numbers ofL infantum promastigotes （50% inhibitory concen- tration （ICso） = 65.9μg/mL; selectivity index （SI）= 22.1） and amastigotes （ICso = 37.9 μg/mL; SI = 38.5） compared with the untreated control. Amphotericin B reduced 100% of the promastigote numbers after 72 h of treatment （IC50 = 0.2μg/mL）. AEPa induced several morphological changes and increased the production of reactive oxygen species and apoptotic death in promastigotes after treating for 72 h. AEPa （100 μg/mL） promoted tumor necrosis factor-α secretion in macrophages infected with L. infantum after 72 h of treatment, but did not induce an increase in this cytokine in noninfected macrophages. In addition, AEPa showed no cytotoxic effect on J774-A1 cells （50% cytotoxic concentration 〉1000μg/mL）. Conclusion： AEPa presented antileishmanial activity against the promastigotes and amastigotes of I.. infantum without macrophage cytotoxicity; these results show that natural products such as P. angulata have leishmanicidal potential and in the future may be an alternative treatment for leishmaniasis.

关键词： Leishmanicidal activity Leishmania infantum Reactive oxygen species Apoptosis Physalis angulata