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	Provedor de dados R. Bras. Zootec. (2) Autor Bambozzi,Andrea Cecchetto (2) Oshiro,Lídia Miyako Yoshii (2) Seixas Filho,José Teixeira de (2) Thomaz,Luciana Almada (2) Rosadas,Leonardo Azevedo da Silva (1) Palavra-chave Alimentação (2) Aqüicultura (2) Camarão-d'água-doce (2) Larvicultura (2) Macrobrachium rosenbergii (2) Brachionus plicatilis (1) Rotífero (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2004 (2) País Brazil (2) Idioma Português (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 181 Primeira ... 1 2 3 4 5 6 7 8 9 ... Última Classification of estuarine particles using automated electron microprobe analysis and multivariate techniques OMA Bernard, P.C.; Van Grieken, R.E.. The suspended particulate matter from a series of stations in an estuary is automatically analyzed for 11 elements on a particle-by-particle basis by using electron microprobe X-ray microanalysis and an automatic image analysis system. The interpretation of the large acquired data set implies numerical multivariate analysis. The developed procedure consists of using cluster analysis on the particles of individual samples, followed by nearest centroid sorting over all samples from the study area. For the Ems estuary, the procedure provided 13 geochemically different particle types of which the relative abundance through the estuary could be followed and interpreted in terms of estuarine mixing processes. The presented methodology could be applied in other... Tipo: Info:eu-repo/semantics/article Palavras-chave: Estuarine chemistry; Multivariate analysis; Suspended particulate matter. Ano: 1986 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3219 Interference of sample size on multicollinearity diagnosis in path analysis PAB Sari,Bruno Giacomini; Lúcio,Alessandro Dal’Col; Olivoto,Tiago; Krysczun,Dionatan Ketzer; Tischler,André Luís; Drebes,Lucas. Abstract: The objective of this work was to evaluate the interference of sample size on multicollinearity diagnosis in path analysis. From the analyses of productive traits of cherry tomato, two Pearson correlation matrices were obtained, one with severe multicollinearity and the other with weak multicollinearity. Sixty-six sample sizes were designed, and from the amplitude of the bootstrap confidence interval, it was observed that sample size interfered on multicollinearity diagnosis. When sample size was small, the imprecision of the diagnostic criteria estimates interfered with multicollinearity diagnosis in the matrix with weak multicollinearity. Tipo: Info:eu-repo/semantics/article Palavras-chave: Solanum lycopersicum; Bootstrapping; Multivariate analysis; Sampling. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000600769 Genetic diversity in table grapes based on RAPD and microsatellite markers PAB Leão,Patrícia Coelho de Souza; Motoike,Sérgio Yoshimitsu. The objective of this work was to analyze the genetic diversity of 47 table grape accessions, from the grapevine germplasm bank of Embrapa Semiárido, using 20 RAPD and seven microsatellite markers. Genetic distances between pairs of accessions were obtained based on Jaccard's similarity index for RAPD data and on the arithmetic complement of the weighted index for microsatellite data. The groups were formed according to the Tocher's cluster analysis and to the unweighted pair‑group method with arithmetic mean (UPGMA). The microsatellite markers were more efficient than the RAPD ones in the identification of genetic relationships. Information on the genetic distance, based on molecular characteristics and coupled with the cultivar agronomic performance,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Vitis vinifera; Cluster analysis; Genetic divergence; Grapevine; Multivariate analysis. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011000900010 Genetic variability in conilon coffee related to grain attributes in an irrigated crop in the Cerrado PAB Brige,Felipe Augusto Alves; Celestino,Sonia Maria Costa; Amabile,Renato Fernando; Fagioli,Marcelo; Delvico,Francisco Marcos dos Santos; Montalvão,Ana Paula Leite; Sala,Pedro Ivo Aquino Leite. Abstract: The objective of this work was to quantify the genetic variability of 213 conilon coffee accessions of the Robusta Tropical cultivar, based on chemical characteristics related to the quality of green coffee beans, as well as to identify promising accessions for the breeding program of irrigated conilon coffee in the Brazilian Cerrado. The chemical characteristics evaluated were: protein and caffeine contents, total soluble solids and total lipids, ether extract, pH, and total titratable acidity. The data were subjected to the principal component analysis and cluster analysis based on the similarities observed within the first two principal components using the minimum variance method (Wards) and, as a measure of similarity, the Euclidean... Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffea canephora; Chemical composition; Genetic diversity; Multivariate analysis. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000102804 Divergence and genetic variability among superior rubber tree genotypes PAB Gouvêa,Lígia Regina Lima; Chiorato,Alisson Fernando; Gonçalves,Paulo de Souza. The objective of this work was to estimate the genetic variability and divergence among 22 superior rubber tree (Hevea sp.) genotypes of the IAC 400 series. Univariate and multivariate analyses were performed using eight quantitative traits (descriptors), including yield. In the univariate analyses, the estimated parameters were: genetic and environmental variances; genetic and environmental coefficients of variation; and the variation index. The Mahalanobis generalized distance, the Tocher agglomerative method and canonical variables were used for the multivariate analyses. In the univariate analyses, variability was verified among the genotypes for all the variables evaluated. The Tocher method grouped the genotypes into 11 clusters of dissimilarity. The... Tipo: Info:eu-repo/semantics/article Palavras-chave: Hevea brasiliensis; Crossbreeding; Multivariate analysis; Selection. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010000200007 Morphoagronomic and molecular characterization of ornamental passion fruit cultivars PAB Fonseca,Kenia Gracielle da; Faleiro,Fábio Gelape; Junqueira,Nilton Tadeu Vilela; Barth,Mariana; Feldberg,Nelson Pires. Abstract: The objective of this work was to validate the morphoagronomic descriptors used in the protection processes of plant cultivars in Brazil, by characterizing six cultivars of ornamental passion fruit. The BRS Rubiflora, BRS Rosea Púrpura, BRS Céu do Cerrado, BRS Roseflora, BRS Estrela do Cerrado, and BRS Pérola do Cerrado cultivars, 33 morphoagronomic descriptors, and two molecular markers were used. The categorical morphoagronomic descriptors were analyzed by frequency distribution and multivariate analyses. The quantitative morphoagronomic descriptors were subjected to the analysis of variance and to the comparison of the means of each cultivar. The random amplified polymorphic DNA (RAPD) and the inter-simple sequence repeats (ISSR) markers were... Tipo: Info:eu-repo/semantics/article Palavras-chave: Passiflora; Molecular markers; Multivariate analysis; Plant cultivar protection. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001000849 Estimates of genetic parameters and cluster analysis for worm resistance and resilience in Santa Inês meat sheep PAB Oliveira,Elisa Junqueira; Savegnago,Rodrigo Pelicioni; Freitas,Luara Afonso de; Freitas,Anielly Paula; Maia,Suellen Rodrigues; Simili,Flávia Fernanda; Faro,Lenira El; Costa,Ricardo Lopes Dias da; Santana Júnior,Mário Luiz; Paz,Claudia Cristina Paro de. Abstract: The objective of this work was to estimate genetic parameters for traits related to resistance to endoparasites in Santa Inês sheep, for a possible inclusion in sheep breeding programs, as well as to evaluate the additive genetic pattern of the animals using cluster analyzes, in order to assess whether there are groups within the population that can be used as candidates for selection for resistance to endoparasites. The studied traits were: Famacha score, fecal egg counts (FEC), packed cell volume (PCV), total plasma protein (TPP), body condition score (BCS), and body weight (BW). Heritability estimates ranged from 0.17 (0.05) for TPP to 0.31 (0.07) for BCS. The cluster analyzes based on the breeding values identified four clusters. Famacha and... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cluster analysis; Famacha; Genetic correlation; Heritability; K-means; Multivariate analysis. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018001201338 Classification and fingerprinting of different berries based on biochemical profiling and antioxidant capacity PAB Milivojević,Jasminka; Rakonjac,Vera; Akšić,Milica Fotirić; Pristov,Jelena Bogdanović; Maksimović,Vuk. The objective of this work was to evaluate the biochemical composition of six berry types belonging to Fragaria, Rubus, Vaccinium and Ribes genus. Fruit samples were collected in triplicate (50 fruit each) from 18 different species or cultivars of the mentioned genera, during three years (2008 to 2010). Content of individual sugars, organic acids, flavonols, and phenolic acids were determined by high performance liquid chromatography (HPLC) analysis, while total phenolics (TPC) and total antioxidant capacity (TAC), by using spectrophotometry. Principal component analysis (PCA) and hierarchical cluster analysis (CA) were performed to evaluate the differences in fruit biochemical profile. The highest contents of bioactive components were found in Ribes... Tipo: Info:eu-repo/semantics/article Palavras-chave: Bioactive compounds; Metabolite fingerprinting; Multivariate analysis; Nutraceuticals; Small fruits. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000900013 Statistical models for evaluating the genotype-environment interaction in maize (Zea mays L.) Phyton Kandus,M; Almorza,D; Boggio Ronceros,R; Salerno,JC. Our objective was to determine the genotype-environment interaction (GxE) in a hybrid integrated by maize lines either carrying or not balanced lethal systems. Experiments were conducted in three locations over a period of two years considering each year-location combination as a different environment. Yield data were analysed using the Additive Main Effects and Multiplicative Interaction (AMMI) model and the Sites Regression Analysis (SREG). Results were represented by biplots. The AMMI analysis was the best model for determining the interaction. Tipo: Info:eu-repo/semantics/article Palavras-chave: Adaptability; Multivariate analysis; Plant breeding; Stability. Ano: 2010 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572010000100007 Weed Flora of Citrus Orchards and Factors Affecting its Distribution in Western Mediterranean Region of Turkey Planta Daninha ONEN,H.; AKDENIZ,M.; FAROOQ,S.; HUSSAIN,M.; OZASLAN,C.. ABSTRACT: Citrus is an important export commodity, mostly grown on Mediterranean and Aegean coasts of Turkey. Weeds are hidden foes impairing citrus productivity. Limited knowledge of weed distribution and factors affecting the distribution are among major hurdles in successful weed management. In this study, weed flora of citrus orchards and factors affecting its distributions in Mugla province of Turkey were determined. Sixty orchards were surveyed in spring and autumn seasons of 2010 and 2011. Data relating to frequency, coverage and density of weed species were recorded. Soil samples (0-30 cm depth) were collected and analyzed for physicochemical properties. Climatic variables, altitude and soil properties were correlated with weed flora. Sixty-eight... Tipo: Info:eu-repo/semantics/article Palavras-chave: Weeds; Multivariate analysis; Soil properties; Weather. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100236 ATRIBUTOS CONSIDERADOS IMPORTANTES NA DECISÃO DE COMPRA DOS COMPRADORES DE CARNE SUÍNA EM BELO HORIZONTE-MG AgEcon Truocchio, Tania Batista Ribeiro; Antonialli, Luiz Marcelo. O objetivo da presente pesquisa foi identificar os atributos considerados importantes na decisão de compra dos compradores de carne suína em Belo Horizonte-MG. Quanto à metodologia, trata-se de uma pesquisa de natureza quantitativa cujos dados foram coletados por meio de um levantamento do tipo survey aplicando-se um questionário estruturado em uma amostra de 399 compradores de carne suína em Belo Horizonte-MG. Utilizou-se para análise dos dados técnicas de estatística descritiva e multivariada (análise de cluster, análise discriminante e análise de variância) por meio do software SPSS (Statistical Package for the Social Sciences). Como conclusões da pesquisa destaca-se que os compradores de carne suína estão mais exigentes quanto à aparência, qualidade e... Tipo: Conference Paper or Presentation Palavras-chave: Carne de suínos; Comportamento de compra; Análise multivariada; Meat of pork; Purchasing behavior; Multivariate analysis; Food Consumption/Nutrition/Food Safety; Livestock Production/Industries. Ano: 2008 URL: http://purl.umn.edu/108602 Structuring Consumer Preferences with the SEM Method AgEcon Rosa, Franco. Structuring preferences has been developed with econometric models using functional flexible parametric form and the exploring the perceptions about expressed and latent needs using different multivariate approaches. Purpose of this research is to explore the demand for a new drink using the mean-end chain (MEC) theory and multivariate SEM procedure. The first part is dedicated to description of specialty foods for their capacity to create new niche markets. The MEC theory is introduced to explain the relations between attributes and consumers' perceptions of secondary needs revealed as benefit and values. The second part is dedicated to the empirical investigation of demand of a drink obtained from the "Olivello spinoso" a spontaneous plant. Empirical... Tipo: Conference Paper or Presentation Palavras-chave: Demand; Mean-End Chain; Multivariate analysis; Specialty products; Niche market; Customer satisfaction; SEM; Consumer/Household Economics. Ano: 2002 URL: http://purl.umn.edu/24966 Multifunctional agriculture: an analysis of country specialization and regional differentiation AgEcon Pierangeli, Fabio; Henke, Roberto; Coronas, M.G.. Member States acknowledge the multifunctional role of the primary sector; however each of them emphasises specific functions according to its own model of agriculture and rural development. As a result, the CAP and the demand of citizens addressing a new role of the primary sector in post-industrial society have contributed to develop a specialisation of multifunctionality at the EU level that is more and more visible moving from an aggregated territorial level (Member Stares) toward a local one (regions). The objective of this paper is to analyse the specialization towards the secondary functions of agriculture at two different territorial and institutional levels: the national level (EU-25) and the regional level (in Italy), with the support of a... Tipo: Conference Paper or Presentation Palavras-chave: Multifunctionality; Territorial specialization; Multivariate analysis; Agricultural and Food Policy. Ano: 2008 URL: http://purl.umn.edu/44244 CARACTERIZAÇÃO DO PERFIL DA APICULTURA EM CAPÃO BONITO E ADJACÊNCIAS AgEcon Fachini, Cristina; Firetti, Ricardo; Oliveira, Eduardo Cardoso De; Carvalho, Antonio Assiz De Filho. O Sudoeste Paulista é a segunda maior região do Estado em importância para a apicultura tendo totalizado em 2006 o valor de produção de R$ 3.052.402 com 17.135 colméias. Em 2006 os “produtores de mel” de Capão Bonito existiam “produtores de mel” que tinham a apicultura como principal fonte de renda até agricultores familiares que tinham a produção de mel como mais uma alternativa de renda. Tais características se traduziam em sistemas de produção com diferentes níveis tecnológicos e, portanto, custos de produção também diferenciados. O presente estudo teve como objetivo caracterizar profundamente o perfil dos produtores apícolas em Capão Bonito e adjacências segundo características sócio-econômicas e o nível tecnológico de produção. Foram aplicados 25... Tipo: Conference Paper or Presentation Palavras-chave: Apicultura; Nível tecnológico; Análise multivariada; Beekeeping; Technology level; Multivariate analysis; Livestock Production/Industries. Ano: 2008 URL: http://purl.umn.edu/114170 Multivariate methods in aquaculture research: case studies of tilapias in experimental and commercial systems AgEcon This volume documents the usefulness of multivariate methods û notably multiple regression, path analysis and canonical correlation û in the context of aquaculture, which has to date tended to neglect such methods, and hence to underutilize available data. All examples used here stem from experimental and/or commercial tilapia culture systems, and hence this book also represents an advance in the understanding of such systems. Tipo: Report Palavras-chave: Aquaculture; Tilapia culture; Growth; Multivariate analysis; Farm Management. Ano: 1993 URL: http://purl.umn.edu/44727 USING MULTIVARIATE RANK SUM TESTS TO EVALUATE EFFECTIVENESS OF COMPUTER APPLICATIONS IN TEACHING BUSINESS STATISTICS AgEcon Su, Yeong-Tzay; Liang, Chyi-Lyi (Kathleen). Arguments about using computer facilities to classroom teaching have gained a lot of attention over time. Using the computer facilities will be helpful to demonstrate real world applications, while poor data or inappropriate case studies might reduce the confidence in applying computer programs in classroom teaching. In this article we examine the results of using computer facilities to teach Business statistics to a group of Management students sampled from Krannert School of Management, Purdue University. This study shows that students are attracted to the interactive computer programs designed for the Business Statistics course, and students are more motivated to attend classes when using computer facilities are applied in teaching. Furthermore,... Tipo: Conference Paper or Presentation Palavras-chave: Rank sum test; Multivariate analysis; Teaching evaluation; Computer applications; Business statistics; Research Methods/ Statistical Methods; Teaching/Communication/Extension/Profession. Ano: 1999 URL: http://purl.umn.edu/21707 Horizontal and vertical tree community structure in a lowland atlantic rain forest, southeastern Brazil Rev. Bras. Bot. Guilherme,Frederico Augusto G.; Morellato,L. Patrícia C.; Assis,Marco A.. The horizontal and vertical tree community structure in a lowland Atlantic Rain Forest was investigated through a phytosociological survey in two 0.99 ha plots in the Intervales State Park, São Paulo State. All trees > 5 cm diameter at breast height were recorded. 3,078 individuals belonging to 172 species were identified and recorded. The Shannon diversity index was H' = 3.85 nat.ind.-1. The Myrtaceae family showed the greatest floristic richness (38 species) and the highest density (745 individuals) in the stand. Euterpe edulis Mart. had the highest importance value (33.98%) accounting for 21.8% of all individuals recorded. The quantitative similarity index was higher than the qualitative index, showing little structural variation between plots.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Diversity; Multivariate analysis; Phytosociology; Tree stratification; Tropical forest. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042004000400012 Variabilidade intra-específica em cinco populações de Oncidium varicosum Lindl. (Orchidaceae -- Oncidiinae) em Minas Gerais Rev. Bras. Bot. CARDIM,DARUSKA CAVALCANTE; CARLINI-GARCIA,LUCIANA APARECIDA; MONDIN,MATEUS; MARTINS,MARINA; VEASEY,ELIZABETH ANN; ANDO,AKIHIKO. Com o objetivo de estudar a variabilidade genética intra-específica em Oncidium varicosum Lindl. (Orchidaceae - Oncidiinae), foram avaliadas cinco populações de Minas Gerais, coletadas em Alfenas (AL), Estiva (ES), Pedra do Coração (PC), Pedra Branca (PB) e Pouso Alegre (PA). Foram considerados 22 caracteres florais, medidos a partir de "vouchers" (fichas florais), empregando-se métodos estatísticos univariados e multivariados (análise discriminante canônica - CDA e análise de agrupamento a partir de distância de Mahalanobis). Houve diferença significativa (p < 0,05) entre populações, pelo teste F, para 13 caracteres. O primeiro eixo canônico separou a população PA de PB e de PC. Os indivíduos de PA são menores que os de PC, que são menores que os de... Tipo: Info:eu-repo/semantics/article Palavras-chave: Orchidaceae; Oncidium varicosum; Morphometric analysis; Genetic variability; Multivariate analysis. Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000500010 A contribution to the phytogeography of Brazilian campos: an analysis based on Poaceae Rev. Bras. Bot. Garcia,Ricardo José Francischetti; Longhi-Wagner,Hilda Maria; Pirani,José Rubens; Meirelles,Sérgio Tadeu. Twenty areas from eight Brazilian states were compared according to a list of 224 species of Poaceae. In order to determinate affinity patterns between the areas, a binary matrix was submitted to cluster and ordination analysis. The patterns found were then faced to climate and geographic position. The scores corresponding to the areas obtained from the cluster analysis showed a strong correlation to temperature. The scores corresponding to the species suggest a gradient that associates distribution patterns to the photosynthetic pathway (C3 or C4). The current results suggest that the traditional classification of the Southern American grasslands might require some modification in order to be broadly applicable in the Brazilian context. Tipo: Info:eu-repo/semantics/article Palavras-chave: Brazilian grasslands; Gramineae; Multivariate analysis; South America. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042009000400009 Influência do solo e topografia sobre as variações da composição florística e estrutura da comunidade arbóreo-arbustiva de uma floresta estacional semidecidual em Ingaí, MG Rev. Bras. Bot. BOTREL,REJANE T.; OLIVEIRA FILHO,ARY T.; RODRIGUES,LUCIENE A.; CURI,NILTON. Foi realizado um levantamento da comunidade arbóreo-arbustiva, da topografia e dos solos de um fragmento de floresta estacional semidecidual com o objetivo de verificar as possíveis correlações entre variações da estrutura fisionômica e composição de espécies e variações do regime de água e fertilidade química dos solos. O fragmento florestal, com área de 17 ha, localiza-se às margens do rio Ingaí (21º24' S e 44º55' W), no município de Ingaí, MG. Foram realizados um levantamento plani-altimétrico da área e uma classificação detalhada dos solos da floresta. Foram alocadas 25 parcelas de 20 × 20 m para amostrar os indivíduos arbóreo-arbustivos com diâmetro à altura do peito (DAP) > ou = 5 cm. Amostras do solo superficial (0-20 cm de profundidade) foram... Tipo: Info:eu-repo/semantics/article Palavras-chave: Tropical semideciduous forest; Riverine forest; Community of trees and shrubs; Multivariate analysis; Soil-vegetation relationship. Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002000200008 Registros recuperados: 181 Primeira ... 1 2 3 4 5 6 7 8 9 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco