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Structure,stability,catalytic activity,and polarizabilities of small iridium clusters

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Chinese Physics B 2018年第6期27卷 225-230页

作者： Francisco E Jorge José R da costa Venaancio Unidade Academica dc Ffsica Universidade Federal de Campina Grande 58429-900 Campina Grande Brazil Departamento de Ffsica Universidade Federal do Espfrito Santo 29060-900 Vitoria Brazil

At the second order Douglas–Kroll–Hess（DKH2） level, the B3 PW91 functional in conjunction with the relativistic all-electron basis set of valence triple zeta quality plus polarization functions are employed to compute bond lengths, dissociation energies, vertical ionization potentials, and the highest occupied molecular orbital-lowest unoccupied molecular orbital energy gaps of the small iridium clusters（Irn, n≤8）. These results are compared with the experimental and theoretical data available in the literature. Our results confirm the theoretical predictions made by Feng et al. about the catalytic activities of the Ir4 and Ir6 clusters. From the optimized geometries, DKH2 calculations of static electric mean dipole polarizabilities and polarizability anisotropies are also carried out. It is the first time that the polarizabilities of small iridium clusters have been studied. For n≤4, the mean dipole polarizabilities per atom present an odd–even oscillatory behavior,whereas from Ir5 to Ir8, they decrease with the cluster size increasing. The dependence of the polarizability anisotropy on the structure symmetry of the iridium cluster is verified.

关键词： B3PW91 functional all-electron basis sets DKH2 calculations iridium clusters polarizabilities

Recovery of rare-earth metals from aqueous solutions by bio/adsorption using non-conventional materials:a review with recent studies and promising approaches in column applications

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Journal of Rare Earths 2020年第4期38卷 339-355页

作者： Talles Barcelos da costa Meuris Gurgel Carlos da Silva Melissa Gurgel Adeodato Vieira University of Campinas School of Chemical EngineeringAlbert Einstein Avenue50013083e852 CampinasBrazil

The recovery of rare-earth metals(REMs)is of great economic and environmental interest,because of their high market prices and various industrial ***,with the increasing demand for high-purity rare-earth compounds,the separation and purification of these elements have gained considerable *** bio/adsorption process has been considered an alternative to recover these elements,by its simplicity,low cost and efficiency for recovery of REMs at low *** review article presents the recent progress regarding REM bio/adsorption published literature in batch system by different non-conventional bio/adsorbents,as well as a critical analysis of the technological challenges to be faced and future *** this purpose,the best application model(isotherm,kinetics),thermodynamic quantities and selection of eluents for desorption studies are also ***,in this review,the application of different bio/adsorbent materials were reviewed extensively in terms of the removal and recovery of REMs in continuous fixed-bed adsorption and regeneration ***,future aspects in bio/adsorption research and prospects for commercial applications were discussed.

关键词： Rare-earth metals Bio/adsorbents Adsorption kinetics Isotherm Batch desorption Continuous fixed-bed adsorption

Ocular prosthesis incorporating IPS e-max press scleral veneer and a literature review on non-integrated ocular prosthesis

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International Journal of Ophthalmology(English edition) 2017年第1期10卷 148-156页

作者： Godwin Clovis da costa Meena Ajay Aras Paul Chalakkal Michelle Clovis da costa Department of Prosthodontics Goa Dental College and HospitalBambolimGoa 403202India Department of Pedodontics and Preventive Dentistry Goa Dental College and HospitalBambolimGoa 403202India Primary DNB(Ophthalmology) West Lion's Super Specialty Eye HospitalBangaloreKarnataka 560002India

The article highlights a new method for the fabrication of an ocular prosthesis by the incorporation of a ceramic scleral veneer. The steps of fabrication include impression making, wax try-in, performing a “cut-back” on a selected stock eye, insertion of the IPS e-max press scleral veneer, finishing and insertion. It also includes a detailed review on non-integrated ocular prostheses.

关键词： IPS e-max press ceramic eye prosthesis ocular prosthesis

Dynamic response of precast segmental bridge columns under heavy truck impact

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Frontiers of Structural and Civil Engineering 2023年第3期17卷 327-349页

作者： Yuye ZHANG Mingli HU Wei FAN daniel DIAS-da-costa Department of Civil Engineering Nanjing University of Science and TechnologyNanjing 210094China Research Institute of Hunan University in Chongqing Chongqing 401120China Key Laboratory for Wind and Bridge Engineering of Hunan Province Hunan UniversityChangsha 410082China School of Civil Engineering The University of SydneySydneyNSW 2006Australia

Considering the wide application of precast segmental bridge columns(PSBCs)in engineering practice,impact-resistant performance has gained significant ***,few studies have focused on PSBCs subjected to high-energy impacts caused by heavy truck ***,the behavior of PSBCs under a heavy truck impact was investigated in this study using high-fidelity finite element(FE)*** detailed FE modeling methods of the PSBCs and heavy trucks were validated against experimental *** validated modeling methods were employed to simulate collisions between PSBCs and heavy *** simulation results demonstrated that the engine and cargo caused two major peak impact forces during ***,the impact force,failure mode,displacement,and internal force of the PSBCs under heavy truck impacts were *** extensive study was performed to assess the influence of the section size,truck weight,impact velocity,and number of precast segments on the impact *** truck weight was found to have a minor effect on the engine impact *** was found to be localized at the bottom of the three segments,with the top remaining primarily *** parametric study demonstrated that larger cross-sections may be a preferred option to protect PSBCs against the impact of heavy trucks.

关键词： precast segmental bridge columns heavy truck collision dynamic response

Management and outcomes of gastric volvulus in children: a systematic review

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World Journal of Pediatrics 2019年第3期15卷 226-234页

作者： Karina Miura da costa Amulya K.Saxena Department of Pediatric Surgery Chelsea Children’s HospitalChelsea and Westminster NHS Foundation TrustImperial College LondonLondonUnited Kingdom Division of Pediatric Surgery Department of Anatomy and SurgeryRibeirao Preto Medical SchoolUniversity of Sao Paulo.Ribeirao Pr&o.Brazil

Background Gastric volvulus (GV) in children is a rare *** study reviewed management and outcomes of GV in the pediatric *** MEDLINE/PubMed,Embase,and Google Scholar databases were searched for studies in English regarding GV in patients < 18 years old between 2008 and 2017,selected by two *** were presented as percentages and ***'s exact test was used to evaluate categorical variables,and Bonferroni correction was applied for multiple *** Ninety-seven papers with 125 patients were *** median age was 24 months,with slightly female *** was the most common symptom and acute presentation occurred in the majority of *** of previous surgery/abdominal trauma was described in 12 and 3 children,*** was diagnostic for GV in most *** initial management was surgical in the majority of cases,with most of them including gastropexy,gastrostomy,or gastric *** GV was associated with acute presentation (P =0.004) and the latter with ischemia (P < 0.01).Complications occurred in 23 (18.9%) children,esophageal stenosis being the most *** were eight (6.4%) deaths,and only one recurrence 6 months after endoscopic *** median follow-up period was 12 *** inclusion of only case reports/case series,the incomplete reporting from papers,and the short followup were limitations of the *** GV occurs at a median age of 24 months and requires high suspicion and prompt management,as mortality is *** preferred surgical approach for GV includes variations of *** stenosis is the most common morbidity post-GV management.

关键词： Gastrectomy Gastric volvulus Gastropexy Gastrostomy Volvulus

Intranasal delivery of nanostructured lipid carriers,solid lipid nanoparticles and nanoemulsions:A current overview of in vivo studies

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Acta Pharmaceutica Sinica B 2021年第4期11卷 925-940页

作者： Cláudia Pina costa Joao Nuno moreira JoséManuel Sousa Lobo Ana Catarina Silva UCIBIO/REQUIMTE MedtechLaboratory of Pharmaceutical TechnologyDepartment of Drug SciencesFaculty of PharmacyUniversity of PortoPorto 4050-313Portugal CNC-Center for Neuroscience and Cell Biology Center for Innovative Biomedicine and Biotechnology(CIBB)University of CoimbraFaculty of Medicine(Pólo I)Coimbra 3004-504Portugal UC-University of Coimbra CIBBFaculty of PharmacyPólo Das Ciências da SaúdeCoimbra 3000-548Portugal FP-ENAS(UFP Energy Environment and Health Research Unit)CEBIMED(Biomedical Research Centre)Faculty of Health SciencesUniversity Fernando PessoaPorto 4249-004Portugal

The management of the central nervous system(CNS)disorders is challenging,due to the need of drugs to cross the blood-brain barrier(BBB)and reach the *** the various strategies that have been studied to circumvent this challenge,the use of the intranasal route to transport drugs from the nose directly to the brain has been showing promising *** addition,the encapsulation of the drugs in lipid-based nanocarriers,such as solid lipid nanoparticles(SLNs),nanostructured lipid carriers(NLCs)or nanoemulsions(NEs),can improve nose-to-brain transport by increasing the bioavailability and site-specifc *** review provides the state-of-the-art of in vivo studies with lipid-based nanocarriers(SLNs,NLCs and NEs)for nose-to-brain *** on the literature available from the past two years,we present an insight into the different mechanisms that drugs can follow to reach the brain after intranasal *** results of pharmacokinetic and pharmacodynamics studies are reported and a critical analysis of the differences between the anatomy of the nasal cavity of the different animal species used in in vivo studies is carried *** the exact mechanism of drug transport from the nose to the brain is not fully understood and its effectiveness in humans is unclear,it appears that the intranasal route together with the use of NLCs,SLNs or NEs is advantageous for targeting drugs to the *** systems have been shown to be more effective for nose-to-brain delivery than other routes or formulations with non-encapsulated drugs,so they are expected to be approved by regulatory authorities in the coming years.

关键词： Nose-to-brain delivery Intranasal administration Nanostructured lipid carriers NLC Solid lipid nanoparticles SLN Nanoemulsions In vivo studies Pharmacokinetic Pharmacodynamics

Paleoproterozoic juvenile magmatism within the northeastern sector of the Sao Francisco paleocontinent:Insights from the shoshonitic high Ba-Sr Montezuma granitoids

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Geoscience Frontiers 2020年第5期11卷 1821-1840页

作者： Samuel moreira Bersan Alice Fernanda de Oliveira costa Andre danderfer Francisco Roberio de Abreu Cristiano Lana Glaucia Queiroga Craig Storey Hugo moreira Universidade Federal de Ouro Preto Programa de Pos-graduacaoDepartamento de GeologiaCampus Morro do CruzeiroOuro PretoMGCEP 35400-000Brazil Universidade Federal de Ouro Preto Departamento de GeologiaCampus Morro do CruzeiroOuro PretoMGCEP 35400-000Brazil Sustain Geologia Ltda Teresa M.Valadares 503/502Belo HorizonteMGCEP 30575-160Brazil University of Portsmouth School of Earth and Environmental SciencesBurnaby BuildingBurnaby RoadPortsmouthPO13QLUK

New,integrated petrographic,mineral chemistry,whole rock geochemical,zircon and titanite UPb geochronology,and zircon Hf isotopic data from the Montezuma granitoids,as well as new geochemical results for its host rocks represented by the Corrego Tingui Complex,provides new insights into the late-to post-collisional evolution of the northeastern Sao Francisco paleocontinent.U-Pb zircon dates from the Montezuma granitoids spread along the Concordia between ca.2.2 Ga to 1.8 Ga and comprise distinct *** I have crystallization ages between ca.2.15 Ga and 2.05 Ga and are interpreted as inherited *** II zircon dates vary from 2.04 Ga to1.9 Ga and corresponds to the crystallization of the Montezuma granitoids,which were constrained at ca.2.03 Ga by the titanite U-Pb *** age zoning is common within the ca.1.8 Ga Group III zircon ages,being related to fluid isotopic re-setting during the Espinhaco rifiting ***εHf(t)analysis show dominantly positive values for both Group I(-4 to+9)andⅡ(-3 to+8)zircons and TDM2 model ages of 2.7-2.1 Ga and 2.5-1.95 Ga,***,the Montezuma granitoids are weakly peraluminous to metaluminous magnesian granitoids,enriched in LILES and LREE,with high to moderate Mg#and depleted in some of the *** lithochemical signature,added to the juvenile signature of both inherited and crystallized zircons,allowed its classification as a shoshonitic high Ba-Sr granitoid related to a late-to post-collisional lithosphere delamination followed by asthenospheric *** this scenario,the partial melting of the lithospheric mantle interacted with the roots of an accreted juvenile intra-oceanic arc,being these hybrid magma interpreted as the source of the Montezuma *** Corrego Tingui Complex host rocks are akin to a syn-to late-collisional volcanic arc granitoids originated from the partial melting of ancient crustal *** results presented in this study have revealed the occurrence of j

关键词： Zircon U–Pb-Hf Titanite U–Pb High Ba–Sr Late-to post-collisional Sao Francisco paleocontinent

Cell membrane and bioactive factors derived from mesenchymal stromal cells: Cell-free based therapy for inflammatory bowel diseases

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World Journal of Stem Cells 2019年第9期11卷 618-633页

作者： Fabiany da costa Goncalves Ana Helena Paz Nephrology and Transplantation Internal MedicineErasmus Medical CenterRotterdamGD 3015Netherlands Experimental Research Center Hospital de Clínicas de Porto AlegrePorto AlegreRS 90035-903Brazil

Inflammatory bowel diseases(IBD)are chronic inflammatory disorders of the gastrointestinal tract associated with multifactorial conditions such as ulcerative colitis and Crohn’s *** the underlying mechanisms of IBD remain unclear,growing evidence has shown that dysregulated immune system reactions in genetically susceptible individuals contribute to mucosal ***,conventional treatments have been effective in inducing remission of IBD but not in preventing the relapse of *** this way,mesenchymal stromal cells(MSC)therapy has been recognized as a promising treatment for IBD due to their immunomodulatory properties,ability to differentiate into several tissues,and homing to inflammatory *** so,literature is conflicted regarding the location and persistence of MSC in the body after *** this reason,recent studies have focused on the paracrine effect of the biofactors secreted by MSC,especially in relation to the immunomodulatory potential of soluble factors(cytokines,chemokines,and growth factors)and extracellular vehicles that are involved in cell communication and in the transfer of cellular material,such as proteins,lipids,and nucleic ***,treatment with interferon-γ,tumor necrosis factor-α,and interleukin-1βcauses MSC to express immunomodulatory molecules that mediate the suppression via cell-contact dependent *** together,we present an overview of the role of bioactive factors and cell membrane proteins derived from MSC as a cell-free therapy that can improve IBD treatment.

关键词： Bioactive factors Cell membrane Mesenchymal stem cells Cell-free therapy Inflammatory bowel diseases

Open data in spatial data infrastructure:the practices and experiences of Poland

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International Journal of Digital Earth 2021年第11期14卷 1547-1560页

作者： Waldemar Izdebski Agnieszka Zwirowicz-Rutkowska Joanna Nowak da costa Warsaw University of Technology WarsawPoland Military University of Technology WarsawPoland

As an important facilitator in e-government and society in general,Open SDI merits an assessment of its characteristics and the monitoring of its *** aim of the study was the proposal of the SDI openness assessment approach based on existing openness assessment frameworks,as well as the presentation of the Polish Spatial data Infrastructure(PSDI)development towards *** results indicated that ten geodetic and cartographic databases fulfilled ten out of eleven criteria of data openness,according to the methodological assumptions,and reached a 3-star level of *** need for further development of the infrastructure towards sharing public administration data is recognized,as well as non-governmental data that meet the open data criteria,thus contributing to the openness of the *** proposed assessment method,referenced to a five-level data openness system and providing clear scoring benchmarking for assessing SDI openness,may be used for comparative analysis of SDI openness in different countries,including EU Member States that draw on the experience of the implementation of the INSPIRE Directive.

关键词： Open government data(OGD) openness assessment geospatial data information society open spatial data infrastructure(open SDI)impact