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| Registros recuperados: 55 | |
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| Teixeira,Matheus Pozetti; Campos,Cid Naudi Silva; Prado,Renato de Mello; Caione,Gustavo; Mingotte,Fábio Luiz Checchio; Agostinho,Flavia Bastos. |
| Abstract The method used to dry plant tissue samples may modify its nutrient content, and results in incorrect diagnostic of crop nutritional status. The hypothesis was that microwave drying method does not affect the nutrient content of leaves neither the interpretation of the results, as compared to oven-drying procedure. In this study we evaluated the effect of microwave drying of eucalyptus (Corymbia Citriodora (Hook.)) and rubber trees (Hevea brasiliensis Muell. Arg.) leaves on dry matter and macronutrient content, as compared to oven drying. The study was performed in a laboratory at the Department of Soils and Fertilizers of Universidade Estadual Paulista “Julio de Mesquita Filho”, UNESP, Jaboticabal-SP-Brazil. The experiments were: one using leaf... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chemical analysis; Dry matter; Nutritional status; Plant material; Plant nutrition. |
| Ano: 2017 |
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952017000500555 |
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| Landell,Marcos Guimarães de Andrade; Prado,Hélio do; Vasconcelos,Antônio Carlos Machado de; Perecin,Dilermando; Rossetto,Raffaella; Bidoia,Márcio Aurélio Pitta; Silva,Marcelo de Almeida; Xavier,Mauro Alexandre. |
| In spite of the great homogeneity found in the morphological characteristics of Oxisols, there is great chemical diversity in subsurface layers of these soils. Studies indicate that crop yield presents significant correlation with the chemical attributes of the subsurface, which, are more stable than attributes found in the plough layer, subject to greater alterations as a consequence of agricultural exploration. This work evaluated the effects of subsurface chemical attributes of Oxisols of the South Central region of Brazil, on the yield of sugarcane clones and of variety RB72454, during the first, second and third cropping cycles. Productivity data were obtained between 1993 and 1998. Soils were characterized in terms of their mechanical analysis and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Yield; Soils; Linear models; Chemical analysis. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000400020 |
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| Barcellos, Priscila Gomes; Rodrigues, José Ariévilo Gurgel; Queiroz, Ismael Nilo Lino de; Araújo, Ianna Wivianne Fernandes de; Benevides, Norma Maria Barros; Mourão, Paulo Antônio de Souza. |
| Ulva lactuca (Chlorophyceae) has biotechnologically-important sulfated-polysaccharides (Ul-SPs), but their potentials on thrombin generation (TG) are unknown. This study analyzed the structural and physical-chemical features of the Ul-SPs as modulators of TG. Proteolytic digestion yielded (13.13%) extract containing sulfate (20.43%) and total sugars (65.72%), besides ulvan consisting of rhamnose, xylose, glucose, glucuronic acid and α-/β-types glycosidic linkages as characterized by one-/two-dimensions nuclear magnetic resonance (NMR) experiments. Fractionation of the Ul-SPs by DEAE-cellulose chromatography yielded Ul-SP1 and Ul-SP2 (0.50 and 0.75 M NaCl, respectively) showing sulfation (15.72-18.04%) and total sugars (59.73-60.58%) consistent with the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ulvales; Complex glycans; Chemical analysis; Thrombosis.. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/34916 |
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| Galindo, Fernando Shintate; Beloni, Tatiane; Buzetti, Salatier; Teixeira Filho, Marcelo Carvalho Minhoto; Dupas, Elisângela; Ludkiewicz, Mariana Gaioto Ziolkowski. |
| The objective of this study was to evaluate the viability of pasture with high production capacity and the potential for production of silage using different sources and doses of nitrogen (N) by quantifying the productivity of dry matter (DM), some qualitative characteristics, the total cost of production (TC) and total operating cost (TOC) of silage production. The experimental design was randomized block in a factorial scheme with four replications including two sources of nitrogen (urea and ammonium nitrate) and five N doses (0, 50, 100, 150, and 200 kg ha-1 by cutting). The increase in N provided greater DM and crude protein content and reduced the fiber content in neutral detergent. The source of N did not affect the chemical composition, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Adubos e adubação; Nutrição de plantas; Fitotecnia nitrogen fertilization; Chemical analysis; Production cost; Tropical grass; Panicum maximum. Adubos e adubação. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/36395 |
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| Galindo, Fernando Shintate; Beloni, Tatiane; Buzetti, Salatier; Teixeira Filho, Marcelo Carvalho Minhoto; Dupas, Elisângela; Ludkiewicz, Mariana Gaioto Ziolkowski. |
| The objective of this study was to evaluate the viability of pasture with high production capacity and the potential for production of silage using different sources and doses of nitrogen (N) by quantifying the productivity of dry matter (DM), some qualitative characteristics, the total cost of production (TC) and total operating cost (TOC) of silage production. The experimental design was randomized block in a factorial scheme with four replications including two sources of nitrogen (urea and ammonium nitrate) and five N doses (0, 50, 100, 150, and 200 kg ha-1 by cutting). The increase in N provided greater DM and crude protein content and reduced the fiber content in neutral detergent. The source of N did not affect the chemical composition, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nitrogen fertilization; Chemical analysis; Production cost; Tropical grass; Panicum maximum.; Adubos e adubação. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/36395 |
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| QUEIROZ, S. C. do N. de; SOUZA, D. R. C. de; CERDEIRA, A. L.; PARAIBA, L. C.. |
| O cultivo de soja utiliza diversos tipos de fungicidas para controlar fungos fitopatogênicos, que, dependendo das características físico-químicas das moléculas, podem se acumular nos grãos e causar riscos à saúde humana. Desse modo, para verificar a presença de resíduos destas substâncias nesta matriz alimentar há necessidade de desenvolver e validar métodos analíticos que sejam sensíveis e confiáveis. Assim, o objetivo deste trabalho foi adaptar e validar um método para a determinação dos fungicidas não-iônicos ciproconazol, epoxiconazol, piraclostrobina e azoxistrobina em grãos de soja, para ser aplicado na validação de um modelo matemático cinético de bioconcentração, a fim de prever o acúmulo desses agrotóxicos nesse alimento. O método analítico... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Mass spectroscopy; Soybean; Fungicida; Resíduo químico; Análise química; Soja; Cromatografia gasosa; Fungicides; Chemical residues; Chemical analysis; Chromatography. |
| Ano: 2017 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1090496 |
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| Registros recuperados: 55 | |
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