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Mineralización de nitrógeno de diferentes abonos orgánicos Colegio de Postgraduados
Córdova Ballona, Georgina.
El uso de fertilizantes orgánicos es una buena alternativa en todos los sistemas de producción agrícola, sobre todo si el fin principal es proveer N, mejorar la fertilidad de los suelos y el mantener o incrementar los rendimientos de los cultivo. El nitrógeno es uno de los nutrimentos que en mayor cantidad demandan los cultivos, una vez aplicado tiene gran dinámica, lo cual, aunado a propiedades indeseables del suelo favorecen su pérdida. El uso de materiales orgánicos en la agricultura tiene múltiples propósitos, van desde el aprovechamiento de subproductos hasta el incremento de la sustentabilidad de los agroecosistemas. No obstante la importancia que tienen los materiales orgánicos, para la zona de estudio existen pocos trabajos que consideren aspectos...
Palavras-chave: Manure; Mineralization; NIRS; Quimiometría; PCA; Producción Agroalimentaria en el Trópico; Maestría.
Ano: 2010 URL: http://hdl.handle.net/10521/100
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Tipificación y caracterización de café comercial mediante métodos instrumentales y quimiometría. Colegio de Postgraduados
Vázquez Hernández, Lorena.
El control de calidad de los productos agroalimentarios está basado en su caracterización bioquímica, como una de las partes esenciales. Para el caso del café, la composición química está fuertemente relacionada con las condiciones agroecológicas (suelo, clima, altura, etc.) de cada una de las regiones productoras. El café es la segunda materia prima en importancia en el mercado nacional, por lo cual, la calidad es importante para este producto. Para asegurarnos de la calidad del café tanto para los consumidores como productores existe la necesidad de establecer métodos analíticos, rápidos, objetivos y sensitivos. Para realizar la caracterización del café comercial existen métodos convencionales establecidos en la Norma Mexicana (NMX-F-013-SCFI-2000),...
Palavras-chave: Café; Quimiometría; NIRS; Homogeneidad; PCA; SIMCA; Coffee; Chemometrics; Homogeneity; Maestría; Producción Agroalimentaria en el Trópico.
Ano: 2011 URL: http://hdl.handle.net/10521/561
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Estudio de la degradación de hidrocarburos en suelos mediante la técnica de infrarrojo cercano. Colegio de Postgraduados
Villegas Cornelio, Víctor Manuel.
Para el análisis de hidrocarburos en muestras de suelos contaminados existen diversos métodos, entre ellos, el más común es el Soxhlet, pero este implica etapas de pretratamiento, extracción, purificación-concentración y análisis. Sin embargo, estos procesos conllevan a la destrucción de las muestras, uso de reactivos y alto costo del análisis. No obstante, con el desarrollo de métodos instrumentales estas etapas se reducen, con la ventaja de disminuir al mínimo la manipulación de las muestras, el tiempo de análisis, el uso de reactivos químicos y las muestras no se destruyen en el análisis. La Espectroscopía de Infrarrojo Cercano (NIRS) como tecnología moderna proporciona datos sobre la naturaleza física y química de la muestra, con la generación de...
Palavras-chave: Gleysol Contaminación Petróleo crudo Quimiometría Degradación de TPH; PCA; LDA; SIMCA; PLS. Pollution Crude oil Chemometrics Degradation of TPH; PCA; LDA; SIMCA; PLS. Maestría Producción Agroalimentaria en el Trópico.
Ano: 2010 URL: http://hdl.handle.net/10521/239
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Tipificación y caracterización de café comercial mediante métodos instrumentales y quimiometría. Colegio de Postgraduados
Vázquez Hernández, Lorena.
El control de calidad de los productos agroalimentarios está basado en su caracterización bioquímica, como una de las partes esenciales. Para el caso del café, la composición química está fuertemente relacionada con las condiciones agroecológicas (suelo, clima, altura, etc.) de cada una de las regiones productoras. El café es la segunda materia prima en importancia en el mercado nacional, por lo cual, la calidad es importante para este producto. Para asegurarnos de la calidad del café tanto para los consumidores como productores existe la necesidad de establecer métodos analíticos, rápidos, objetivos y sensitivos. Para realizar la caracterización del café comercial existen métodos convencionales establecidos en la Norma Mexicana (NMX-F-013-SCFI-2000),...
Palavras-chave: Café; Quimiometría; NIRS; Homogeneidad; PCA; SIMCA; Coffee; Chemometrics; Homogeneity; Maestría; Producción Agroalimentaria en el Trópico.
Ano: 2011 URL: http://hdl.handle.net/10521/561
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Mineralización de nitrógeno de diferentes abonos orgánicos Colegio de Postgraduados
Córdova Ballona, Georgina.
El uso de fertilizantes orgánicos es una buena alternativa en todos los sistemas de producción agrícola, sobre todo si el fin principal es proveer N, mejorar la fertilidad de los suelos y el mantener o incrementar los rendimientos de los cultivo. El nitrógeno es uno de los nutrimentos que en mayor cantidad demandan los cultivos, una vez aplicado tiene gran dinámica, lo cual, aunado a propiedades indeseables del suelo favorecen su pérdida. El uso de materiales orgánicos en la agricultura tiene múltiples propósitos, van desde el aprovechamiento de subproductos hasta el incremento de la sustentabilidad de los agroecosistemas. No obstante la importancia que tienen los materiales orgánicos, para la zona de estudio existen pocos trabajos que consideren aspectos...
Palavras-chave: Manure; Mineralization; NIRS; Quimiometría; PCA; Producción Agroalimentaria en el Trópico; Maestría.
Ano: 2010 URL: http://hdl.handle.net/10521/100
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Tipificación de miel de diferente origen botánico o geográfico mediante la espectroscopia de infrarrojo cercano Colegio de Postgraduados
Reyes Sánchez, Carlos Augusto.
Para tipificar miel existen diferentes alternativas metodológicas, en donde los procedimientos utilizados para resolver la mayoría de los problemas implican obtener información sobre los compuestos individuales de la mezcla. Cuando el problema no es qué contiene la muestra sino determinar su identidad la solución puede ser mediante señales de perfil (huellas espectrales) de un grupo de compuestos. La información contenida en las huellas espectrales se extrae mediante técnicas quimiométricas. Los métodos instrumentales modernos (espectroscopia de infrarrojo cercano, cromatografía de gases, espectrometría de masas acoplada a un generador de espacio de cabeza, espectroscopia UV-Vis, etc.), presentan gran interés principalmente por su elevada velocidad de...
Tipo: Tesis Palavras-chave: Miel mexicana; Tipificación; Quimiometría; HCA; PCA; Maestría; Producción Agroalimentaria en el Trópico.; Mexican honey; Typifying; Chemometric treatment.
Ano: 2009 URL: http://hdl.handle.net/10521/1669
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Estudio de la degradación de hidrocarburos en suelos mediante la técnica de infrarrojo cercano. Colegio de Postgraduados
Villegas Cornelio, Víctor Manuel.
Para el análisis de hidrocarburos en muestras de suelos contaminados existen diversos métodos, entre ellos, el más común es el Soxhlet, pero este implica etapas de pretratamiento, extracción, purificación-concentración y análisis. Sin embargo, estos procesos conllevan a la destrucción de las muestras, uso de reactivos y alto costo del análisis. No obstante, con el desarrollo de métodos instrumentales estas etapas se reducen, con la ventaja de disminuir al mínimo la manipulación de las muestras, el tiempo de análisis, el uso de reactivos químicos y las muestras no se destruyen en el análisis. La Espectroscopía de Infrarrojo Cercano (NIRS) como tecnología moderna proporciona datos sobre la naturaleza física y química de la muestra, con la generación de...
Palavras-chave: Gleysol Contaminación Petróleo crudo Quimiometría Degradación de TPH; PCA; LDA; SIMCA; PLS. Pollution Crude oil Chemometrics Degradation of TPH; PCA; LDA; SIMCA; PLS. Maestría Producción Agroalimentaria en el Trópico.
Ano: 2010 URL: http://hdl.handle.net/10521/239
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Structure and genetic relationships between Brazilian naturalized and exotic purebred goat domestic goat (Capra hircus) breeds based on microsatellites Genet. Mol. Biol.
Oliveira,Joelliton Domingos de; Igarashi,Maria Luiza Silveira de Paiva; Machado,Théa Mírian Medeiros; Miretti,Marcos Mateo; Ferro,Jesus Aparecido; Contel,Eucleia Primo Betioli.
The genetic relationships and structure of fourteen goat (Capra hircus) populations were estimated based on genotyping data from 14 goat populations (n = 410 goats) at 13 microsatellite loci. We used analysis of molecular variance (AMOVA), principal component analysis (PCA) and F statistics (F IS, F IT and F ST) to evaluate the genetic diversity (Ho, He and ad) of the goats. Genetic distances between the 14 goat populations were calculated from allelic frequency data for the 13 microsatellite markers. Moderate differentiation was observed for the populations of the undefined breeds (including the Anglo-Nubian-M breed), the naturalized Brazilian breeds (Moxotó, Canindé), the exotic purebred breeds (Alpine, Saanen, Toggenbourg and Anglo-Nubian) and the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Goat; Microsatellite; Genetic distance; PCA; AMOVA; Genetic relationships; Genetic diversity; F statistics.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000300010
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Molecular and morphological approaches for species delimitation and hybridization investigations of two Cichla species Iheringia, Sér. Zool.
Mourão,Andrea A. F.; Freitas-Souza,Diogo; Hashimoto,Diogo T.; Ferreira,Daniela C.; Prado,Fernanda D. do; Silveira,Rosicleire V.; Foresti,Fausto; Porto-Foresti,Fábio.
ABSTRACT The hybridization is a widely-discussed issue in several studies with fish species. For some authors, hybridization may be related with diversification and speciation of several groups, or also with the extinction of populations or species. Difficulties to differentiate species and hybrids may be a problem to correctly apply a management of wild species, because hybrid lineages, especially the advanced ones, may resemble the parental species. The genus Cichla Bloch & Schneider, 1801 constitutes an interesting experimental model, considering that hybridization and taxonomic uncertainties hinder a correct identification. Considering these problems, in this study, we developed genetic methodologies and applied meristic and morphometric approaches...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cichla kelberi; Cichla piquiti; Carijó; Cluster Similarity; PCA; PCR-multiplex.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212017000100216
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Study of high frequency measurements from the MesuRho mooring ArchiMer
Fuchs, Rosalie; Pairaud, Ivane.
The high frequency MesuRho station, part of the MAREL network and located at the mouth of the Rhone River is presented. Measures sometimes show bias signs, drift or double, so that a graphical interface was implemented to quickly visualize data and eventually correct them. Original data set and corrected data for 2009-2013 are presented, the methods of corrections provided are detailed. Finally an example of a storm event study (under strong south east wind) between the 4th and the 7th of March 2013 is presented and some prospects to improve data management are proposed.
Tipo: Text Palavras-chave: MesuRho; Code qualité; Correction des données; Analyse et traitement de données; Filtrage; ACP; Fourier; Évènement de vent d'Est; MesuRho; Quality code; Data corrections; Data and treatments analysis; Filtering; PCA; Fourier; Storm event.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00226/33697/32082.pdf
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Taxonomic revision of Magnolia section Maingola (Magnoliaceae) Naturalis
Kim, Sangtae; Nooteboom, Hans P.; Park, Chong-Wook; Suh, Youngbae.
Magnolia section Maingola Dandy is distinguished from other members of Magnoliaceae by the combination of a terminal brachyblast, cylindrical fruits, and free stipules. Morphological characters were re-examined for section Maingola and section Alcimandra, which has been considered to be closely related to the former. Although section Alcimandra is separated from section Maingola in having long stamens which hide the gynoecium, it is combined with section Maingola because this feature is frequently found in various other taxa of the family. Moreover, recent molecular phylogenetic studies have also demonstrated the close affinity between sections Maingola and Alcimandra. For the Magnolia macklottii complex, which has been problematic due to the wide range of...
Tipo: Article / Letter to the editor Palavras-chave: Magnolia; Magnoliaceae; Magnolia macklottii; Complex; Section; Maingola; PCA.
Ano: 2002 URL: http://www.repository.naturalis.nl/record/526153
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Long bone histology and microanatomy of Placodontia (Diapsida: Sauropterygia) Naturalis
Klein, N.; Houssaye, A.; Neenan, J.M.; Scheyer, T.M..
Placodontia, an enigmatic group of durophagous and in part heavily armoured animals, were members of Sauropterygia, the most diverse and successful group of Mesozoic marine reptiles. Microanatomy and histology of long bones of several armoured and non-armoured Placodontia were studied, covering most of their taxonomic breadth, to elucidate the paleoecology, physiology, and lifestyle of its members. Results reveal an unexpected and not phylogenetically or stratigraphically related disparity of microanatomical and histological features for the group. The non-armoured Paraplacodus and the heavily armoured Psephoderma grew with lamellar-zonal bone tissue type, which is typical for modern sauropsids. In the former, the tissue is nearly avascular surrounding a...
Tipo: Article / Letter to the editor Palavras-chave: Bone mass increase; Bone tissue types; Extinct marine reptiles; High growth rates; PCA; Swimming capabilities; Triassic; 38.22.
Ano: 2015 URL: http://www.repository.naturalis.nl/record/521679
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Sponge diversity and community composition in Irish bathyal coral reefs Naturalis
Soest, R.W.M van; Cleary, D.F.R.; Kluijver, M.J. de; Lavaleye, M.S.S.; Maier, C.; Duy, F.C. van.
Sponge diversity and community composition in bathyal cold water coral reefs (CWRs) were examined at 500-900 m depth on the southeastern slopes of Rockall Bank and the northwestern slope of Porcupine Bank, to the west of Ireland in 2004 and 2005 with boxcores. A total of 104 boxcore samples, supplemented with 10 trawl/dredge attempts, were analyzed for the presence and abundance of sponges, using microscopical examination of (sub)samples of collected coral branches, and semi-quantitative macroscopic examination. Approximate minimum size of identified and counted sponge individuals was 1 mm. Literature data were added to the Porcupine Bank results to compensate for a less intensive sampling program in that location. Species richness and abundance were...
Tipo: Article / Letter to the editor Palavras-chave: Coldwater; Multivariate analysis; North Atlantic; Ordination; PCA; Porifera; RDA; 42.72.
Ano: 2007 URL: http://www.repository.naturalis.nl/record/226534
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A new species of Bryconamericus (Characidae: Stevardiinae: Diapomini) from the upper rio Paraná basin, Brazil Neotropical Ichthyology
Jerep,Fernando C.; Shibatta,Oscar A..
ABSTRACT Bryconamericus is the most diverse genus within Stevardiinae, comprising 61 valid species distributed in Cis- and Trans-Andean basins from Panama in Central America to northern Argentina in South America. Three species are known from the upper rio Paraná basin: B. exodon, B. iheringii, and B. turiuba. Herein we describe a new species of Bryconamericus from the upper rio Paraná basin inhabiting tributaries of Ivaí, Piquiri, and Tibagi basins, Paraná State, Brazil. The new species differs from its congeners by the presence of unaligned teeth in the outer tooth row of the premaxilla; a single, vertical, dorsally expanded and rounded humeral spot; 36-39 pored scales in the longitudinal series; body depth 31.6-37.9% SL; anal-fin base length 24.8-30.1%...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Actinopterygii; Characiformes; Geometric Morphometrics; PCA; Taxonomy.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000300207
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Rhizosphere bacterial communities of potato cultivars evaluated through PCR-DGGE profiles PAB
Ferreira,Enderson Petrônio de Brito; Dusi,André Nepomuceno; Xavier,Gustavo Ribeiro; Rumjanek,Norma Gouvêa.
The objective of this work was to determine the shifts on the PCR-DGGE profiles of bacterial communities associated to the rhizosphere of potato cultivars, in order to generate baseline information for further studies of environmental risk assessment of genetically modified potato plants. A greenhouse experiment was carried out with five potato cultivars (Achat, Bintje, Agata, Monalisa and Asterix), cultivated in pots containing soil from an integrated system for agroecological production. The experiment was conducted in a split plot randomized block design with five cultivars, three sampling periods and five replicates. Rhizosphere samples were collected in three sampling dates during plant development. DNA of rhizosphere microorganisms was extracted,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Solanum tuberosum; Associative bacteria; Molecular marker; PCA.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2008000500008
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Morphological characterization of Amiata donkey through Multivariate analyses R. Bras. Zootec.
Sargentini,Clara; Tocci,Roberto; Martini,Andrea; Bozzi,Riccardo.
ABSTRACT The objective of this study was to evaluate the morphology and biometrics of female Amiata donkeys reared in four different areas of southern Tuscany, Italy, to determine the differentiation degree of animals. Four southern Tuscan areas were investigated: two mountainous zones (East and West Amiata) and two flatter areas (Coastal area and Siena surrounding). Morphology and biometrics of adult female Amiata donkeys were collected to determine the homogeneity of the population. Primitive coat markings typical of the breed (shoulder and leg stripes) were found in Amiata donkey. Jennets from Siena surrounding were more dolichomorphic, while West Amiata individuals were smaller. The Principal Component Analysis and the Discriminant Analysis separated...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biometrics; Discriminant analysis; Donkeys; Geographical diversity; Morphology; PCA.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100544
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Multivariate analysis of morphometry effect on race performance in Thoroughbred horses R. Bras. Zootec.
Paksoy,Yavuzkan; Ünal,Necmettin.
ABSTRACT The objective of this study was to determine the effects of morphometric measurements on race performance (m/sec) of Thoroughbred horses. Data of morphometric measurements (withers height, rump height, chest girth, chest width, front chest width, chest depth, neck length, shoulder length, length of withers to rump, rump length, body length, head width, head length, and cannon circumference) were taken from 244 Thoroughbred horses chosen at random. A total of 2888 racing records were considered for race performance. The effects of environmental factors on morphometric measurements (stallion, gender, age, and mother age) and race performance (gender, age, mother age, year, hippodrome, race distance, racetrack, and race type) were analyzed using the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Environmental factors; Morphometric measurements; PCA; Flat racing.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100511
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Tipificação de fatores relacionados à produção leiteira e seu impacto sobre a qualidade sanitária do leite Sci. Agrar.Paran. / SAP
Ilton Isandro Eckstein; Unioeste; Magali Soares Pozza; Uem; Carlos Esduardo Ramos; Universidade federal do reconcavo da Bahia; Maximiliane Alavrase Zambom; Unioeste; Ricardo Kazama; Universidade Federal de Santa Catarina; Geraldo Tadeu Santos; UEM; Paulo Cesar Pozza; UEM.
Com o objetivo de identificar e caracterizar os sistemas de produção leiteira em relação à higiene e práticas sanitárias na ordenha sobre a qualidade sanitária do leite, 32 propriedades foram analisadas por meio da coleta de dados utilizando questionário semi-estruturado. Os dados coletados foram analisados por meio de análise estatística multivariada, usando a Análise de Componentes Principais (PCA) e análise de Classificação Hierárquica Ascendente - Cluster (CHA). Primeiramente, a análise de agrupamento foi utilizada para a formação de grupos de...
Tipo: Artigo Avaliado por Pares Palavras-chave: PCA; Higiene; Leite.
Ano: 2016 URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/10589
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Soil Chemical and Spectroscopy Characteristics and the Effect of Management Practices Sci. Agrar.Paran. / SAP
Nogueira, Barbara Arruda; Merlin, Nathalie; Santos, Poliana Macedo dos; Santos, José Alfredo Baptista dos; Saab, Sergio da Costa; Tonial, Larissa Macedo dos Santos.
The aim of this study was to evaluated the facility to apply spectroscopic analysis coupled with chemometrics analysis as a rapid method for soil analysis. Soil samples from different depths (0-10, 10-20 and 20-30 cm) and treatment sites (area of fallow land for 5 years, area of no-tillage for 10 years and native forest) were applied in this study. Soil chemical characterization based on the concentration of macro-, micronutrients and the level of the toxic element showed significant different among to the samples under differences management systems. PCA and HCA analysis evaluated with soil chemical characterization showed that the samples were grouped according to the management systems. Similar results were obtained in the PCA and HCA analysis developed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Spectroscopy; Chemometrics; Soil management; PCA; HCA.
Ano: 2018 URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/16175
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Assessment of heavy metals in soils of a vineyard region with the use of principal component analysis Scientia Agricola
Valladares,Gustavo Souza; Camargo,Otávio Antônio de; Carvalho,José Ruy Porto de; Silva,Alessandra Maria Cia.
Agricultural management with chemicals may contaminate the soil with heavy metals. The objective of this study was to apply Principal Component Analysis and geoprocessing techniques to identify the origin of the metals Cu, Fe, Mn, Zn, Ni, Pb, Cr and Cd as potential contaminants of agricultural soils. The study was developed in an area of vineyard cultivation in the State of São Paulo, Brazil. Soil samples were collected and GPS located under different uses and coverings. The metal concentrations in the soils were determined using the DTPA method. The Cu and Zn content was considered high in most of the samples, and was larger in the areas cultivated with vineyards that had been under the application of fungicides for several decades. The concentrations of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: PCA; GIS; Soil pollution; Copper; Zinc.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000300011
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