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Allocation of New Construction Land Based on Land Competitiveness Evaluation AgEcon
Huo, Guang-hui; Huang, Liang-xiang.
Connotation of land competitiveness is expatiated from both the narrow sense and broad sense. Evaluation index system of land competitiveness is established according to the 2008 China Statistical Yearbook and 2008 China Land Resources Statistical Yearbook. Efficiency Coefficient Method and Principal Component Analysis Method are used to evaluate the land competitiveness of 31 provincial units in China. Result shows that in the year 2007, land competitiveness gradually decreases from southeast to northwest. The land competitiveness and GDP per unit land have significant negative correlation. The rank of approved new construction land has low positive correlation with the rank of land competitiveness in China. This indicates that there is little correlation...
Tipo: Journal Article Palavras-chave: Land competitiveness; New construction land; Pareto Optimality; Efficiency coefficient method; Principal component analysis; China; Agribusiness.
Ano: 2010 URL: http://purl.umn.edu/102394
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An electronic tongue taste evaluation: identification of goat milk adulteration with bovine milk IPB - Escola Superior Agrária
Dias, L.G.; Peres, António M.; Veloso, Ana C.A.; Reis, F.S.; Vilas-Boas, Miguel; Machado, A.A.S.C..
An electronic tongue with 36 cross-sensibility sensors was built allowing a successful recognition of the five basic taste standards, showing high sensibility to acid, salty and umami taste substances and lower performance to bitter and sweet tastes. The taste recognition capability was afterwards tested in the detection of goat milk adulteration with bovine milk, which is a problem for the dairy industry. This new methodology is an alternative to the classical analyticalmethods used to detect caprine milk adulterations with bovine milk, being a simpler, faster and economical procedure. The different signal profiles recorded by the e-tongue device together with linear discriminant analysis allowed the implementation of a model that could distinguish...
Tipo: Article Palavras-chave: Electronic tongue; Taste standards; Milk adulteration; Cow milk; Goat milk; Principal component analysis; Linear discriminant analysis.
Ano: 2009 URL: http://hdl.handle.net/10198/1029
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Análise de agrupamento de dados de expressão gênica na Rede Genômica Animal. Infoteca-e
HIGA, R. H.; GIACHETTO, P. F.; YAMAGISHI, M. E. B.; IBELLI, A. M. G.; REGITANO, L. C. de A.; CARDOSO, F. F..
O objetivo deste trabalho é apresentar a análise de agrupamento de dados de expressão gênica, conforme realizada no escopo da ?Rede Genômica Animal?. Na seção 2, são apresentados conceitos básicos sobre análises de agrupamento. Em particular, os algoritmos de agrupamento utilizados nessas análises compreendem aqueles mais conhecidos, como k-means, SOM e agrupamento hierárquico. A plataforma de análise escolhida para realização das análises de agrupamento na ?Rede Genômica Animal? é o ambiente de análise estatística R (R DEVELOPMENT CORE TEAM, 2010) e o projeto Bioconductor (GENTLEMAN et al., 2004). Assim, na seção 3 é apresentado um exemplo completo de análise de agrupamento e seu respectivo script R.
Tipo: Comunicado Técnico (INFOTECA-E) Palavras-chave: Agrupamento de dados; Expressão gênica; Rede Genômica Animal; Análise de componentes principais - PCA.; Análise Estatística.; Gene expression; Algorithms; Statistical analysis; Principal component analysis.
Ano: 2010 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/883623
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Aplicativo para análise de componentes principais. Infoteca-e
PALUMBO, F. V. P.; CARVALHO, J. R. P. de; MOURA, M. F..
Análise por componentes principais. Entrada de dados para o aplicativo: Procedimento. Opções do aplicativo. Especificação de algoritmos: Descrição de método. Cálculo usando a matriz de variâncias e covariâncias(S). Cálculo usando a matriz de correlação (R). Cálculo usando a Matriz Parcial.
Tipo: Comunicado Técnico (INFOTECA-E) Palavras-chave: Algoritmos; Software NTIA; Análise de componentes principais; Análise multivariada; Algorithms; Computer software; Principal component analysis; Multivariate analysis.
Ano: 1999 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/6923
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Bacteria diversity and microbial biomass in forest, pasture and fallow soils in the southwestern Amazon basin Rev. Bras. Ciênc. Solo
Cenciani,Karina; Lambais,Marcio Rodrigues; Cerri,Carlos Clemente; Azevedo,Lucas Carvalho Basílio de; Feigl,Brigitte Josefine.
It is well-known that Amazon tropical forest soils contain high microbial biodiversity. However, anthropogenic actions of slash and burn, mainly for pasture establishment, induce profound changes in the well-balanced biogeochemical cycles. After a few years the grass yield usually declines, the pasture is abandoned and is transformed into a secondary vegetation called "capoeira" or fallow. The aim of this study was to examine how the clearing of Amazon rainforest for pasture affects: (1) the diversity of the Bacteria domain evaluated by Polymerase Chain Reaction and Denaturing Gradient Gel Electrophoresis (PCR-DGGE), (2) microbial biomass and some soil chemical properties (pH, moisture, P, K, Ca, Mg, Al, H + Al, and BS), and (3) the influence of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Land use changes; PCR-DGGE; Bacterial diversity; Microbial biomass; Principal component analysis.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000400015
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Benchmarking pathway interaction network for colorectal cancer to identify dysregulated pathways BJMBR
Wang,Q.; Shi,C.-J.; Lv,S.-H..
Different pathways act synergistically to participate in many biological processes. Thus, the purpose of our study was to extract dysregulated pathways to investigate the pathogenesis of colorectal cancer (CRC) based on the functional dependency among pathways. Protein-protein interaction (PPI) information and pathway data were retrieved from STRING and Reactome databases, respectively. After genes were aligned to the pathways, each pathway activity was calculated using the principal component analysis (PCA) method, and the seed pathway was discovered. Subsequently, we constructed the pathway interaction network (PIN), where each node represented a biological pathway based on gene expression profile, PPI data, as well as pathways. Dysregulated pathways...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pathway interaction network; Colorectal cancer; Dysregulated pathways; Principal component analysis; Protein-protein interaction.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2017000500602
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Bioactive phytochemicals and antioxidant activity in fresh and dried lychee fractions1 Rev. Ciênc. Agron.
Queiroz,Estela de Rezende; Abreu,Celeste Maria Patto de; Oliveira,Kelly da Silva; Ramos,Vinicius de Oliveira; Fráguas,Rodrigo Martins.
Fruit of the lychee cv. Bengal are approximately 50% peel and seeds, which are discarded. These by-products have antioxidant compounds which are capable of blocking the harmful effects of free radicals in the body. Bioactive compounds (ascorbic acid, beta-carotene, lycopene and phenols) and antioxidant activity were evaluated in different extracts, both fresh and dried at 45 °C, of the skin, pulp and seeds of the lychee, which were subjected to principal component analysis to clarify which of the compounds are responsible for this activity. Principal component analysis explained 82.90% of the variance of the antioxidant profile of the lychee. The peel displayed higher levels of phenols, ascorbic acid, beta-carotene and antioxidant activity, while the seeds...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lychee; Antioxidants; Principal component analysis.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000100163
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Characterization of phosphate structures in biochar from swine bones PAB
Novotny,Etelvino Henrique; Auccaise,Ruben; Velloso,Marcia Helena Rodrigues; Corrêa,Juliano Corulli; Higarashi,Martha Mayumi; Abreu,Valéria Maria Nascimento; Rocha,José Dilcio; Kwapinski,Witold.
The objective of this work was to develop an alternative methodology to study and characterize the phosphate crystalline properties, directly associated with solubility and plant availability, in biochar from swine bones. Some phosphate symmetry properties of pyrolyzed swine bones were established, using solid state nuclear magnetic resonance spectroscopy, principal component analysis, and multivariate curve resolution analysis, on four pyrolyzed samples at different carbonization intensities. Increasing carbonization parameters (temperature or residence time) generates diverse phosphate structures, increasing their symmetry and decreasing the crossed polarizability of the pair ¹H-31P, producing phosphates with, probably, lower solubility than the ones...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bone phosphate; Phosphate availability; Principal component analysis; Pyrolysis; Multivariedade curve resolution analysis; Soil fertility.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000500006
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Chemical characteristics of grape juices from different cultivar and rootstock combinations PAB
Nassur,Rita de Cássia Mirela Resende; Pereira,Giuliano Elias; Alves,Juliana Alvarenga; Lima,Luiz Carlos de Oliveira.
The objective of this work was to evaluate the influence of different combinations of grape cultivars and rootstocks on chemical characteristics of grape juices. Six treatments were evaluated, consisting of combinations between the Isabel Precoce and BRS Cora grape cultivars and the 'IAC 766', 'IAC 313', and 'IAC 572' rootstocks. Approximately 10 L of juice were obtained per treatment. Analyses of color, total soluble solids content, pH, anthocyanins, total phenolics, total sugars, and quantification and identification of biogenic amines by HPLC were performed. Biogenic amines, such as putrescine, cadaverine, spermidine, and spermine, were found in all evaluated cultivars. By principal component analysis (PCA), treatments can be divided into two groups,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vitis labrusca; Anthocyanins; Biogenic amines; Phenolics; Principal component analysis.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014000700540
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Chemical quality of bottled mineral waters from markets of Curitiba-PR-Brazil BABT
Santos,Éder José dos; Oliveira Junior,Dasio Roberto de; Hermann,Amanda Beatriz; Sturgeon,Ralph Edward.
ABSTRACT Twenty-seven bottled mineral waters from local markets in Curitiba, State of Paraná, Brazil were analyzed for a number of constituents, including: pH, conductivity, total dissolved solids, hardness, HCO3 - and CO 3 2-, as well as Ca2+, Mg2+, Na+, K+, NH4 + , F-, Cl-, NO3 -, NO2 - and SO4 2- by ion chromatography (IC); Al, Ba, Cd, Cr, Cu, Fe, Li, Mn, Ni, Sr, V and Zn by inductively coupled plasma optical emission spectrometry (ICP OES); Hg by cold vapor generation-ICP OES and As, Pb, Sb and Se by ICP-mass spectrometry (ICP-MS). The obtained limits of quantitation (LOQ) were adequate for the determination of all analytes using the various analytical techniques. Results for the analysis of AccuStandard certified reference materials QCS-01-5,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bottled mineral waters; Elemental composition; Chemical quality; Principal component analysis.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100513
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Chemometrics applied to the incorporation of omega-3 in tilapia fillet feed flaxseed flour Ciênc. Tecnol. Aliment.
Nishiyama,Márcia Fernandes; Souza,Aloisio Henrique Pereira de; Gohara,Aline Kirie; Santos,Hevelyse Munise Celestino dos; Oliveira,Carlos Antonio Lopes de; Ribeiro,Ricardo Pereira; Souza,Nilson Evelázio de; Gomes,Sandra Terezinha Marques; Matsushita,Makoto.
This study evaluated the effect of adding flaxseed flour to the diet of Nile tilapia on the fatty acid composition of fillets using chemometrics. A traditional and an experimental diet containing flaxseed flour were used to feed the fish for 60 days. An increase of 18:3 n-3 and 22:6 n-3 and a decrease of 18:2 n-6 were observed in the tilapia fillets fed the experimental diet. There was a reduction in the n-6:n-3 ratio. A period of 45 days of incorporation caused a significant change in tilapia chemical composition. Principal Component Analysis showed that the time periods of 45 and 60 days positively contributed to the total content of n-3, LNA, and DHA, highlighting the effect of omega-3 incorporation in the treatment containing flaxseed flour.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Nile tilapia; Essential fatty acids; Flaxseed flour; Principal component analysis.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612014000300003
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Classification of the EU countries labour markets AgEcon
Kaba, Bohumil.
The objective of the paper is to classify the labour markets of the EU member states on the basis of selected employment and unemployment indicators. In order to achieve the study target, the adequate multivariate exploration procedures have been chosen. In the first part of processing original data, principal component analysis (PCA) was employed. PCA is a multivariate statistical procedure used to reduce the number of observed variables into a smaller number of uncorrelated variables with a minimum loss of information. Moreover, the PCA results can be used for effective ranking of the EU countries according to observed indicators of labour markets. This paper describes the crucial steps in PCA and procedure for ranking mentioned and it reviews how...
Tipo: Journal Article Palavras-chave: Classification; Employment; Unemployment; Principal component analysis; Cluster; International Development; Public Economics; Research Methods/ Statistical Methods; GA; IN.
Ano: 2010 URL: http://purl.umn.edu/99227
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Coliform density in oyster culture waters and its relationship with environmental factors PAB
Mignani,Luciene; Barbieri,Edison; Marques,Helcio Luis de Almeida; Oliveira,Ana Julia Fernandes Cardoso de.
The objective of this work was to evaluate the total and thermotolerant coliform densities in the oyster culture water of Cananeia, SP, Brazil, correlating these densities with environmental variables and tidal variations. Superficial water samples were collected in two tide conditions (spring and neap) from three areas of Cananéia municipality (Mandira, Itapitangui and Cooperostra). The three studied areas showed good conditions for the culture regarding coliform densities. The two tidal conditions differed significantly as to total coliform concentration; however, the same procedure was not performed for thermotolerant coliforms. No correlation was observed between water temperature, pH, and concentrations of total and thermotolerant coliforms. Coliform...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crassostrea; Contamination; Microbiology; Principal component analysis; Total and thermotolerant coliforms.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000800007
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Combining Multivariate Analysis and Pollen Count to Classify Honey Samples Accordingly to Different Botanical Origins Chilean J. Agric. Res.
Corbella,Eduardo; Cozzolino,Daniel.
This study reports the combination of multivariate techniques and pollen count analysis to classify honey samples accordingly to botanical sources, in samples from Uruguay. Honey samples from different botanical origins, namely Eucalyptus spp. (n = 10), Lotus spp. (n = 12), Salix spp. (n = 5), “mil flores” (Myrtaceae spp.) (n = 12) and coronilla (Scutia buxifolia Reissek) (n = 10) were analysed using Melissopalynology (pollen identification). Principal component analysis (PCA) and linear discriminant analysis (LDA) were used to classify the honey samples accordingly to their botanical origin based on a pollen count. Honey samples of higher percentage (> 70%) of Eucalyptus, Lotus and Scutia pollen were 100% correctly classified, whilst samples from...
Tipo: Journal article Palavras-chave: Honey; Uruguay; Principal component analysis; Linear discriminant analysis; Pollen analysis.
Ano: 2008 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392008000100010
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Comparative analysis of citrus fruits for nutraceutical properties Ciênc. Tecnol. Aliment.
REHMAN,Shams Ur; ABBASI,Kashif Sarfraz; QAYYUM,Abdul; JAHANGIR,Muhammad; SOHAIL,Asma; Nisa,Sobia; TAREEN,Muhammad Naveed; TAREEN,Muhammad Javed; SOPADE,Peter.
Abstract Fruits and vegetables (F and V) are valuable for their micronutrients, but many F and V in diverse growth areas have not been scientifically validated for these components. The nutraceutical characteristics of the pulp of eight citrus fruits grown in Pakistan were, therefore, investigated. Expectedly, the fruits differed in moisture (86.9-88.9%), ash (0.37-0.53%), pH (2.9-5.8), total soluble solids (8.1-13.7 °Brix), titratable acidity (7.9-13.1%), total sugars (5.1-8.8%), reducing sugars (2.8-4.3%), and non-reducing sugars (0.3-0.5%) contents. Potassium, sodium and magnesium were the major minerals, while iron, zinc and manganese were present in minor fractions in the pulps. Phytochemical analysis (total phenolic content, 132-243 µg/g GAE; total...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antioxidant potential; Citrus spp.; Major minerals; Principal component analysis.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019005031105
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Comparative analysis of micro-regions in the northern Great Plain Region AgEcon
Kiraly, Zsolt; Szmolka, Andrea.
Our short paper examines the region of the Northern Great Plain, mainly due to its disadvantaged situation. Comparative analysis of the micro-regions in this particular region was implemented to identify possible causes for differentiation between the micro-regions. Finding these causes would then help us find more effective ways to address regional inequalities, currently one of the central issues not only in Hungary but throughout Eastern Europe. The methods used for such analysis included statistical indicators, such as difference in migration rates, rate of unemployment, number of incorporated enterprises per 1000 inhabitants etc., as well as the principal component analysis and the currently applicable categorisation system for micro-regions. The...
Tipo: Journal Article Palavras-chave: Regional differences; Micro-region; Principal component analysis; Területi különbségek; Kistérség; Főkomponens analízis; Community/Rural/Urban Development; Research Methods/ Statistical Methods.
Ano: 2009 URL: http://purl.umn.edu/92539
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Comparative leaf anatomy and micromorphology of Psychotria species (Rubiaceae) from the Atlantic Rainforest Acta Botanica
Moraes,Tarsila Maria da Silva; Rabelo,Guilherme Rodrigues; Alexandrino,Camilla Ribeiro; Silva Neto,Sebastião José da; Da Cunha,Maura.
The genus Psychotria comprises approximately 2,000 species that are mostly shrubs distributed in forests of the tropics and subtropics. Within the Rubiaceae, Psychotria is well known for its species that produce bioactive alkaloids and for its taxonomic complexity. The anatomical and micromorphological characters of the leaves of P. hoffmannseggiana, P. carthagenensis, P. deflexa, P. glaziovii, P. leiocarpa, P. racemosa, and P. vellosiana were investigated and described to understand the interspecific variation of these species, which will contribute to the systematics of the genus. Principal component analysis (PCA) and unweighted pair group method analysis (UPGMA) indicated four groups based on the presence or absence of some of the characters studied....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Leaf anatomy; Cluster analysis; Principal component analysis; Systematic anatomy; Domatia; Leaf surface morphology.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062011000100021
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Comparison of physical and chemical composition of three chinese jujube (Ziziphus jujuba Mill.) cultivars cultivated in four districts of Xinjiang region in China Ciênc. Tecnol. Aliment.
CHEN,Kai; FAN,Dingyu; FU,Bing; ZHOU,Jianzhong; LI,Huanrong.
Abstract This study investigated the physical and chemical composition of three jujube fruits cultivated in China. The objective was to explore the effect of jujube genotype and cultivation districts on the quality of jujube fruits. Results showed significant differences on their physical and chemical composition. The Junzao cultivar contained relatively low level on the total dietary fiber, protein, total sugar, and total titratable acids. The Huizao cultivar possessed the mediate level of the sugar-to-acid ratio and ascorbic acid. The Dazao cultivar showed high level of the total dietary fiber, protein, sugar, and total acids. The cultivation districts exerted important roles in altering the physicochemical indexes of the same jujube cultivar. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Jujube fruits; Composition; Cultivation district; Principal component analysis.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019000400912
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Comprehensive Evaluation on Consumption Structure of Rural Residents with Principal Component Analysis in China AgEcon
Guan, Lin; Li, Chun lan; Zhang, Bo.
In order to make analysis on consumption structure of rural residents, the paper make a principle component analysis on consumption expenditure per capita of rural residents in different areas of 2009 based on statistics of China statistical yearbook of 2010. Selecting a principal component, the paper arranges 31 provinces in China in order. Shanghai lists the 1st place with highest marks; coastal provinces in southeastern part, the Northeast, Beijing and Tianjin are at the top; the northern and central parts with Hebei, Shanxi, Hubei as representatives scores minus which is a little lower than that of average; the western part, such as Guizhou, Xizang, Ganssu and so on are in far behind. The paper also makes analysis on the consumption structure of rural...
Tipo: Journal Article Palavras-chave: Rural residents; Consumption; Principal component analysis; China; Agribusiness.
Ano: 2011 URL: http://purl.umn.edu/113432
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Cycle, physicochemical characterization and climatic adaptation of a white hybrid grape on different rootstocks Bragantia
Mattar,Gabriel Stefanini; Modesto,Lenon Romano; Hernandes,José Luiz; Tecchio,Marco Antonio; Moura,Mara Fernandes.
ABSTRACT This study evaluated the cycle duration, physicochemical characteristics of fruits and climatic adaptation of the ‘SR 501-17’ hybrid grape grafted on four rootstocks for the production of white wine. We tested four rootstocks, ‘IAC 766 Campinas’, ‘IAC 572 Jales’, ‘IAC 571-6 Jundiaí’ and ‘IAC 313 Tropical’, planted in two climatic regions, Cfa and Aw, in the state of São Paulo, Brazil in the cultivation years 2014 and 2015. Cycle duration, production, cluster weight, number of berries per bunch, content of soluble solids, titratable acidity, a maturation index and the weight, length and width of berries were evaluated. A principal component analysis characterized the cultivar for both climatic regions and years. The rootstock did not influence the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Canopy/rootstock; Climate; Principal component analysis; Vitis.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000300470
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