Guia de fontes

Publicações - ciências exatas e da terra

Eucalyptus cinerea: Microscopic Profile, Chemical Composition of Essential Oil and its Antioxidant, Microbiological and Cytotoxic Activities PAUZER, MATHEUS SAUKOSKI; KANUNFRE, CARLA CRISTINE; PAULA, JOSIANE DE FÁTIMA PADILHA DE; FARAGO, PAULO VITOR; BUDEL, JANE MANFRON; BORSATO, THAIS DE OLIVEIRA; ALMEIDA, VALTER PAES DE; RAMAN, VIJAYASANKAR; JUSTUS, BARBARA; PEREIRA, CAMILA BUGNOTTO; FLORES, THIAGO BEVILACQUA; Beatriz Helena Lameiro Noronha Sales Maia; MENEGHETTI, EMANUELLE KRETZ BRAZILIAN ARCHIVES OF BIOLOGY AND TECHNOLOGY (ONLINE), v. 64, n. spe, p. e21200772 2021 DOI Palavra-chave: Eucalyptus cinerea; essential oil; Antimicrobial activity resumo ... HIGHLIGHTS Eucalyptus cinerea essential oil (EO) contains 1,8-cineole as the main component....
Evaluating Temporal Correlations in Time Series Using Permutation Entropy, Ordinal Probabilities and Machine Learning BOARETTO, BRUNO R. R.; BUDZINSKI, ROBERTO C.; ROSSI, KALEL L.; PRADO, THIAGO L.; LOPES, S. R.; MASOLLER, CRISTINA Entropy, v. 23, n. 8, p. 1025 2021 DOI Palavra-chave: Permutation entropy; Machine learning Áreas do conhecimento: Ciências Exatas e da Terra; Ciência da Computação; Metodologia e Técnicas da Computação; Engenharia de Software; Ciências Exatas e da Terra; Física; DINâMICA NãO LINEAR resumo ... Time series analysis comprises a wide repertoire of methods for extracting information from data sets. Despite great advances in time series analysis, identifying and quantifying the strength of nonlinear temporal correlations remain a challenge. We have recently proposed a new method based on training a machine learning algorithm to predict the temporal correlation parameter, α, of flicker noise (FN) time series. The algorithm is trained using as input features the probabilities of ordinal patterns computed from FN time series, xαFN(t), generated with different values of α. Then, the ordinal probabilities computed from the time series of interest, x(t), are used as input features to the trained algorithm and that returns a value, αe, that contains meaningful information about the temporal correlations present in x(t). We have also shown that the difference, Ω, of the permutation entropy (PE) of the time series of interest, x(t), and the PE of a FN time series generated with α=αe, xαeFN(t), allows the identification of the underlying determinism in x(t). Here, we apply our methodology to different datasets and analyze how αe and Ω correlate with well-known quantifiers of chaos and complexity. We also discuss the limitations for identifying determinism in highly chaotic time series and in periodic time series contaminated by noise. The open source algorithm is available on Github.
Evolution of growth density equation by constraints on effective Newtonian constant G Abraão Jessé Capistrano de Souza Classical and Quantum Gravity, v. 38, n. 04, p. 045008 2021 DOI Home page Palavra-chave: Cosmologia; Curvatura extrínseca; Dark energy Áreas do conhecimento: Ciências Exatas e da Terra; Ciência da Computação; Metodologia e Técnicas da Computação; Engenharia de Software resumo ...
First occurrence of jumping trackway in upper Paleozoic glacially-related deposits, Paraná Basin, Brazil, and paleoenvironmental implications SILVA, DHIEGO CUNHA DA; Cristina Silveira Vega; VESELY, FERNANDO FARIAS; SCHEMIKO, DANIELLE CRISTINE BUZATTO; BOLZON, ROBSON TADEU ICHNOS-AN INTERNATIONAL JOURNAL FOR PLANT AND ANIMAL TRACES, v. 1, p. 1-12, 2021 DOI Palavra-chave: Grupo Itararé; paleoambiente; Paleoicnologia Áreas do conhecimento: Ciências Exatas e da Terra; Ciência da Computação; Metodologia e Técnicas da Computação; Engenharia de Software; Ciências Exatas e da Terra; Geociências; Geologia; Paleontologia Estratigráfica resumo ... Ichnology is fundamental to understanding characteristics of paleoenvironments such as hydrodynamic energy, oxygenation, salinity and substrate consistency. The Itararé Group is a Mississippian-Cis...
Flaxseed gum/agar blends and nanocomposites: preparation and physical properties PRADO, NATÁLIA SOARES; DA SILVA, INGRID SOUZA VIEIRA; DE ALMEIDA NASCIMENTO, JOSÉ AUGUSTO; PASQUINI, DANIEL; Harumi Otaguro IRANIAN POLYMER JOURNAL, v. 30, n. 8, p. 821-830, 2021 DOI Palavra-chave: Nanocomposites; cellulose nanocrystal; Agar; Flaxseed gum; Blends Áreas do conhecimento: Ciências Exatas e da Terra; Química; Materiais poliméricos; Engenharias; Engenharia de Materiais e Metalúrgica; Materiais Não-Metálicos; Polímeros, Aplicações; Ciências Exatas e da Terra; Química; Química Orgânica; Polímeros e Colóides resumo ... This work was conducted with the objective of improving the physicochemical properties of flaxseed gum with added agar. Three formulations of flaxseed gum/agar (FG/AG) blends (75/25, 50/50 and 25/75) were studied in the presence of glutaraldehyde as crosslinking agent and a glycerol plasticizing agent. Cellulose nanocrystals (CNCs) were used as reinforcing agents at different levels (2%, 4% and 8% w/w) to prepare nanocomposite films by casting polymeric blends of flax seed and agar with both additives. The interaction with water (vapor permeability and solubility), scanning electron microscopy and tensile tests were performed for films, blends and nanocomposites. The flaxseed gum, agar and additives showed good homogeneity, as demonstrated by scanning electron microscopy. All the formulations presented tenacity increase between 585 and 811%, and lower values of solubility relative to the control film (FGcontrol). The best formulation of nanocomposites was 50/50–4% CNCs, that presented higher modulus of elasticity and increase in tenacity of 130% relative to the 50/50 blend and 1588% relative to the control film. The results showed that AG and CNC can modulate the properties of FG, opening numerous opportunities for investigation. Due to the significant improvement in the mechanical properties, FG/AG blends and nanocomposites have excellent potential in applications as sustainable packaging.
Fluid approach of linear cosmological Nash-Greene perturbations Abraão Jessé Capistrano de Souza Physics of the Dark Universe, v. 33, p. 100872 2021 DOI Home page Palavra-chave: Dark energy; Nash-Greene theorem Áreas do conhecimento: Ciências Exatas e da Terra; Ciência da Computação; Metodologia e Técnicas da Computação; Engenharia de Software resumo ...
FONTES, GESTÃO E DIVULGAÇÃO CIENTÍFICA: relato do desenvolvimento de uma ferramenta de busca para Imprensa Rodrigo Eduardo Botelho Francisco; Fabia Cristiane Ioscote; Antonio Rodrigues Barros; Matheus Dias Galdino Soares REVISTA OBSERVATÓRIO, v. 7, n. 3, p. 1-26, 2021 DOI Home page Palavra-chave: Fontes de informação; Gestão de Conteúdos; Desenvolvimento web; jornalismo; Divulgação científica Áreas do conhecimento: Ciências Sociais Aplicadas; Ciências Sociais Aplicadas; Ciência da Informação; Ciências Exatas e da Terra; Ciência da Computação; Metodologia e Técnicas da Computação; Engenharia de Software resumo ... (en) This article aims to present a report of the development of the Guia de Fontes @UFPR, a search tool for scientific information created by the Agency School of Public Communication and Scientific and Cultural Dissemination (AE) of the Federal University of Paraná (UFPR). In this context, the paper discusses information and scientific content management from an interdisciplinary point of view and describes the development of the software covering Journalism, Information Management and Computing, areas of knowledge in which the methodological principles of the Guia de Fontes @UFPR are based. In conclusion, the work also presents the results under the Scientific Popularization. (pt) This article aims to present a report of the development of the Guia de Fontes @UFPR, a search tool for scientific information created by the Agency School of Public Communication and Scientific and Cultural Dissemination (AE) of the Federal University of Paraná (UFPR). In this context, the paper discusses information and scientific content management from an interdisciplinary point of view and describes the development of the software covering Journalism, Information Management and Computing, areas of knowledge in which the methodological principles of the Guia de Fontes @UFPR are based. In conclusion, the work also presents the results under the Scientific Popularization.
Formação de um habitus futebolístico em mulheres no Brasil: um relato a partir das vivências e vida adulta Leila Salvini; Wanderley Marchi Júnior Revista Brasileira de Educação Física e Esporte, v. 35, n. 2, p. 263-271, 2021 DOI Palavra-chave: futebol feminino; Habitus; futebol brasileiro; Sociologia do Esporte Áreas do conhecimento: Ciências Exatas e da Terra; Sociologia do Esporte; Ciências Exatas e da Terra; Geociências; Educação Física resumo ... (en) This writing aims to identify initial provisions to soccer practice and the formation of a habitus of soccer in women, therefore, were conducted four semi-structured interviews with players of a football team from Curitiba/PR that throughout their careers participated in offi cial matches defending the Brazilian National Women's soccer. After analyzing the information, we conclude that the initial arrangements for the practice of soccer are based on six steps shared by all interviewees, and that the necessary arrangements for them to step into the space of soccer are not the same as it maintains. (pt) O presente escrito tem como objetivo identificar disposições iniciais à prática do futebol e a formação de um habitus futebolístico em mulheres, para tanto, foram realizadas quatro entrevistas semiestruturadas com jogadoras de uma equipe de futebol da cidade de Curitiba/PR que no decorrer de suas carreiras participaram de partidas oficiais defendendo a Seleção Brasileira de Futebol Feminino. Após análise das informações, concluímos que as disposições iniciais para a prática do futebol baseiam-se em seis etapas compartilhadas por todas as entrevistadas, e que as disposições necessárias para elas adentrarem o espaço do futebol não são as mesmas que as mantém nele.
Formation of a penta- or hexacoordinated Cu−(II) semicarbazone complex: Revisiting semicarbazone metal complexes SALBEGO, PAULO R.S.; Marcos Antônio Pinto Martins; WEIMER, GUSTAVO H.; Alexandre Robison Meyer; SOEK, RAFAEL N.; GARBELINI, ELLERY R.; NUNES, FÁBIO S.; Nilo Zanatta; Helio Gauze Bonacorso; HÖRNER, MANFREDO JOURNAL OF MOLECULAR STRUCTURE, v. 1231, p. 129942 2021 DOI Palavra-chave: Cu-Pentacoordinated complex; Semicarbazone metal complexes; Metal coordination; intramolecular interactions; Supramolecular Clusters; Similarity indices resumo ...
Fractal structures in the deflection of light by a pair of charged black holes DE SOUZA FILHO, EDSON E.; MATHIAS, AMANDA C.; VIANA, R. L. CHAOS SOLITONS & FRACTALS, v. 150, p. 111139 2021 DOI Palavra-chave: Bacias de escape e de Wada Áreas do conhecimento: Ciências Exatas e da Terra; Física; Física Geral; Dinamica Nao-Linear e Caos; Ciências Exatas e da Terra; Física; Física Geral; Relatividade e Gravitação resumo ...

Total de registros: 6641