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microstructural evaluation of initial dissolution of aluminosilicate particles and formation of geopolymer material

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Particuology 2018年第6期16卷 101-111页

作者： Rozineide A.Antunes Boca Santa Julia Cristie Kessler cintia Soares Humberto Gracher Riella Department of Chemical Engineering Federal University of Santa CatannaP.O.Box 476TrindadeFlorianopolis88040-900SCBrazil

The rheological behavior of microparticulate structures of geopolymers was *** materials were developed from alternative sources of aluminosilicate and were activated in different concentrations using 5,10,and 15m sodium hydroxide,and sodium silicate,which were added in a 2:1ratio (by volume).The solid constituents used were bottom ash/metakaolin and neat metakaolin in a 2:1blend. The theological characteristics were determined after 5min of homogenization and a subsequent curing of the pastes at room temperature for 28 *** materials presented amorphous characteristics, which confirmed the formation of geopolymers.A thixotropic behavior was observed for all forrfiulations,except for bottom ash/metakaolin activated at 5m,which resulted in geopolymers with a lower intensity compared with those activated at 10 and 15m,High activator concentrations exhibited a proportional relationship for geopolymer ring growth,which resulted in a reduced structure mobility and, consequently,an increased viscosity and yield *** effects are more evident in the metakaolin samples,and are associated with the water content that is required for *** that were activated with 10m sodium hydroxide presented a favorable workability and particle packing,in terms of the theological and structural aspects.

关键词： metakaolin Bottom ash Alkaline activation Geopolymer particle microstructural Rheology

Influence of donor age on the differentiation and division capacity of human adipose-derived stem cells

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World Journal of Stem Cells 2020年第12期12卷 1640-1651页

作者： cintia DS Horinouchi maría Julia Barisón Anny W Robert Crisciele Kuligovski Alessandra m Aguiar BrunoDallagiovanna Stem Cells Basic Biology Laboratory Instituto Carlos ChagasCuritiba 81350010ParanáBrazil

BACKGROUND Human adipose-derived stromal/stem cells(hASCs)are one of the most useful types of mesenchymal stromal/stem cells,which are adult multipotent cells with great therapeutic potential for the treatment of several ***,for successful clinical application,it is critical that high-quality cells can be *** factors seem to be able to influence cell quality and performance,especially factors related to donors’intrinsic characteristics,such as ***,there is no consensus regarding this characteristic,and there is conflicting information in the *** To investigate the growth kinetics and differentiation potential of adipose-derived stem cells isolated from the lipoaspirates of elderly and young *** hASCs were harvested from liposuctioned adipose tissue obtained from female donors(aged 20-70 years).Cells were distributed into two groups according to age range:old hASCs(oASCs,≥55 years,n=9)and young hASCs(yASCs,≤35 years,n=9).For each group,immunophenotypic characterization was performed by flow *** doubling time was assessed over seven *** adipogenic potential evaluation,lipid deposits were assessed after 7 d,14 d and 21 d of adipogenic *** potential was verified by analyzing cell mineralization after 14 d,21 d and 28 d of osteogenic *** expression of PPARγ2,CEBPA and Runx2 were detected by quantitative reverse transcription polymerase chain *** hASCs were successfully obtained,cultured,and grouped according to their age:yASCs(26.33±4.66 years old)and oASCs(64.78±4.58 years old).After maintenance of the cells in culture,there were no differences in morphology between cells from the young and old ***,both groups showed classical immunophenotypic characteristics of mesenchymal stem/stromal *** average doubling time indicated that yASCs(4.09±0.94 d)did not significantly differ from oASCs(4.19±1.29 d).Concerning differentiation pot

关键词： Adipose-derived stem cells Stem cells Adipogenesis Osteogenesis Cell differentiation Donor age

Enhancement of seed germination in macaranga peltata for use in tropical forest restoration

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Journal of Forestry Research 2014年第4期25卷 897-901页

作者： Cassie R.rodrigues Bernard F.rodrigues Department of Botany Goa University Goa 403206 India

We used pre-sowing treatments v/z., soaking seeds in concen- trated sulphudc acid （CSA）, gibberellic acid （GA）, combined treatment of CSA ＋ GA and mechanical scarification to overcome seed dormancy and enhance synchronous germination of macaranga peltata seeds. We analysed percent seed germination data by logistic regression and con- finned that except in GA treatment, time and acid concentration together were crucial for enhancing germination. The combination treatment of CSA and GA resulted in higher percent germination （up to 74%） than either treatment used separately, but produced defective seedlings （26%）. mechanical scarification of seed coat had the greatest impact in enhanc- ing germination （78%） and reducing imbibition time （6 days） against the control （0%）. Germination studies and SEm analysis confirmed that seed germination in m. peltata was inhibited by seed coat dormancy.

关键词： dormancy gibberellic acid (GA) mechanical scarification restoration seed coat

Evolutionary importance of the relationship between cytogeography and climate:New insights on creosote bushes from North and South America

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Plant Diversity 2022年第5期44卷 492-498页

作者： Romina Vidal-Russell mariana Tadey Romana Urfusova Tomás Urfus cintia Paola Souto Laboratorio Ecotono-INIBIOmA(CONICET-UNComahue) Quintral1250BarilocheRío NegroArgentina Department of Botany Faculty of ScienceCharles UniversityBenátská212800PragueCzech Republic

Relationships between genome size and environmental variables suggest that DNA content might be adaptive and of evolutionary importance in *** genus Larrea provides an interesting system to test this hypothesis,since it shows both intra-and interspecific variation in genome *** has an amphitropical distribution in North and South American deserts,where it is most *** tridentata in North America shows a gradient of increasing autopolyploidy;while three of the four studied South American species are diploids,Larrea divaricata,Larrea nitida,Larrea ameghinoi,and the fourth is an allopolyploid,Larrea *** downloaded available focal species’georeferenced records from seven data *** used these records to extract biologically relevant environmental variables from WorldClim at 30 arc seconds scale,to have a broad characterization of the variable climatic conditions of both regions,and a climatic envelope for each *** estimated relative DNA content index and relative monoploid genome values,by flow cytometry,of four most abundant Larrea species throughout their respective *** we winnow the bioclimatic dataset down to uncorrelated variables and sampled locales,to analyse the degree of association between both intra-and interspecific relative DNA content and climatic variables that are functionally relevant in arid environments using Pearson correlations,general linear and mixed effects *** the genus Larrea,relative DNA content increases with rising temperature and decreases with rising *** the intraspecific level,all four species show relative DNA content variation across climatic *** is a genus that shows genome size variation correlated with *** results are also consistent with the hypothesis that extreme environmental pressures may have facilitated repeated whole genome duplication events in North America,while in South America,reticulate evolution,as allopolyploidizati

关键词： DNA content Drylands Genome size Jarilla Larrea Zygophyllaceae

Larvicidal efficacy of plant extracts and isolated compounds from Annonaceae and Piperaceae against Aedes aegypti and Aedes albopictus

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Asian Pacific Journal of Tropical medicine 2020年第9期13卷 384-396页

作者： Alzeir m.rodrigues Victor Emanuel P.martins Selene m.morais Departamento de Ensino Instituto Federal de EducaçãoCiência e Tecnologia do Ceará(IFCE)Rodovia CE 060km 332Vila Martins63.560-000 AcopiaraCearáBrazil Programa de Pós-Graduação em Biotecnologia RENORBIOUniversidade Estadual do CearáAvenida Doutor Silas Munguba170060741-000 FortalezaCearáBrazil Instituto de Ciências Exatas e da Natureza Universidade da Integração Internacional da Lusofonia Afro-Brasileira(Unilab)Campus das AurorasRua JoséFranco de Oliveira s/n62790-970 RedençãoCearáBrasil Departamento de Química Universidade Estadual do CearáAvenida Doutor Silas Munguba170060741-000 FortalezaCearáBrazil

The Aedes(Ae.)aegypti and *** mosquitoes are vectors of epidemiologically relevant arboviruses in the public health context,such as the dengue,Zika and chikungunya *** the alternatives to synthetic insecticides for the control of these vectors,the use of natural plant products deserves *** review summarizes findings on the larvicidal potential of plant extracts on *** and ***,as well as the potential of isolated compounds from plants of the Annonaceae and Piperaceae families against these *** related to larvicidal activity of plant extracts and isolated compounds in Aedes *** the Web of Science database were used,for plant extracts considering publications between 2000 and 2019.A total of 859 articles were analyzed for plant extracts and estimates of lethal concentration values(LC50 and LC90).In the end,95 articles that presented the larvicidal potential of 150 plant species from 52 families were *** two families most studied for this activity were Fabaceae and Asterace *** plant families with the best LC50 values against mosquitoes were Piperaceae and *** activity of 50 acetogenins has already been identified on ***,and 29 of them presented LC50 below 10μg/mL,as well as the larvicidal activity of 8 compounds isolated from ***,plants of these two families are promising for the development of commercial botanical larvicides in the form of extracts and isolated substances,as well as the production via organic synthesis of the most active compounds.

关键词： Larvicidal activity Plant extracts Acetogenins Aedes

Analysis of antisym metric cross-ply laminates using high-order shear deformation theories:a meshless approach

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Acta mechanica Sinica 2020年第5期36卷 1078-1098,I0003页

作者： D.E.S.rodrigues J.Belinha L.m.J.S.Dinis R.m.Natal Jorge Institute of Science and Innovation in mechanical and Industrial Engineering 4200-465 PortoPortugal Department of mechanical Engineering School of EngineeringPolytechnic of Porto(ISEP)4200-072 PortoPortugal Department of mechanical Engineering Faculty of EngineeringUniversity of Porto(FEUP)4200-465 PortoPortugal

For many years finite element method(FEm)was the chosen numerical method for the analysis of composite ***,in the last 20 years,the scientific community has witnessed the birth and development of several meshless methods,which are more flexible and equally accurate numerical *** meshless method used in this work is the natural neighbour radial point interpolation method(NNRPIm).In order to discretize the problem domain,the NNRPIm only requires an unstructured nodal ***,using the Voronoi mathematical concept,it enforces the nodal connectivity and constructs the background integration *** NNRPIm shape functions are constructed using the radial point interpolation *** this work,the displacement field of composite laminated plates is defined by high-order shear deformation *** the end,several antisymmetric cross-ply laminates were analysed and the NNRPIm solutions were compared with the *** obtained results show the efficiency and accuracy of the NNRPIm formulation.

关键词： Antisymmetric cross-ply laminates High-order shear deformation theories meshless methods Naturalneighbour radial point interpolation method(NNRPIm)

Lactate Dehydrogenase Isoenzymes in mammalian Cells Exposed to Isophenphos

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Biomedical and Environmental Sciences 1995年第1期8卷 18-22页

作者： m.A.LAR.rodrigues m.J.B.FERNANDES 等 InstitutoBiologico CaixaPostal7119010641－970SaoPauloBrazil InstitutoBiologico CaixaPostal71190106

The cytotoalcity of isophenphos, an organophosphorus insecticide that has the potential to cause delayed polyneuropathy, was evaluated in GBK and V79 ce1ls. A 72 h time course following isophenphos exposure indicated a dose-dependent growth inhibition as dctermined by cell counts. The administration of isophenphos (20g/ml) to GBK cells cultured at high densities indicated a decrease in the activities of LDH isocnzymes. Analysis of V79 cells revealed a decrease of LDH3, the only LDH isocnzyme detected in these cells.

关键词： In lung LDH Lactate Dehydrogenase Isoenzymes in mammalian Cells Exposed to Isophenphos

Augmented reality system to assist inexperienced pool players

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Computational Visual media 2016年第2期2卷 183-193页

作者： L.Sousa R.Alves J.m.F.rodrigues LARSy S and Institute of Engineering University of the Algarve LARSy S CIAC and Institute of Engineering University of the Algarve

Pool and billiards are amongst a family of games played on a table with six pockets along the rails. This paper presents an augmented reality tool designed to assist unskilled or amateur players of such games. The system is based on a projector and a Kinect 2 sensor placed above the table, acquiring and processing the game on-the-fly. By using depth information and detecting the table's rails(borders),the balls' positions, the cue direction, and the strike of the ball, computations predict the resulting balls' trajectories after the shot is played. These results—trajectories, visual effects, and menus—are visually output by the projector, making them visible on the snooker table. The system achieves a shot prediction accuracy of 98% when no bouncing occurs.

关键词： computer vision augmented reality(AR) Kinect pool game

The initial stages of Li_(2)O_(2) formation during oxygen reduction reaction in Li-O_(2) batteries:The significance of Li_(2)O_(2) in charge-transfer reactions within devices

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Journal of Energy Chemistry 2024年第1期88卷 223-231,I0006页

作者： Daniela m.Josepetti Bianca P.Sousa Simone A.J.rodrigues Renato G.Freitas Gustavo Doubek Advanced Energy Storage Division LABCenter for Innovation on New EnergiesSchool of Chemical EngineeringUniversity of CampinasAv Albert Einstein 50013083-852CampinasSPBrazil Institute of Physics&Department of Chemistry Laboratory of Computational MaterialsFederal University of Mato Grosso78060-900CuiabáMTBrazil

Lithium-oxygen batteries are a promising technology because they can greatly surpass the energy density of lithium-ion ***,this theoretical characteristic has not yet been converted into a real device with high *** with air contamination,metallic lithium reactivity,and complex discharge and charge reactions are the main issues for this technology.A fast and reversible oxygen reduction reaction(ORR)is crucial for good performance of secondary batteries',but the partial knowledge of its mechanisms,especially when devices are concerned,hinders further *** this perspective,the present work uses operando Raman experiments and electrochemical impedance spectroscopy(EIS)to assess the first stages of the discharge processes in porous carbon electrodes,following their changes cycle by cycle at initial operation.A growth kinetic formation of the discharge product signal(Li_(2)O_(2))was observed with operando Raman,indicating a first-order reaction and enabling an analysis by a microkinetic *** solution mechanism in the evaluated system was ascribed for an equivalent circuit with three time *** the time constant for the anode interface reveals to remain relatively constant after the first discharge,its surface seemed to be more *** model indicated that the reaction occurs at the Li_(2)O_(2) surface,decreasing the associated resistance during the initial discharge ***,the growth of Li_(2)O_(2) forms a hetero-phase between Li_(2)O_(2)/electrolyte,while creating a more compact and homogeneous on the Li_(2)O_(2)/cathode *** methodology here described thus offers a way of directly probing changes in surface chemistry evolution during cycling from a device through EIS analysis.

关键词： Li-O_(2)battery Operando Raman analysis Equivalent circuit modeling Time-constant distribution