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| Registros recuperados: 13.807 | |
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| Benatti,Bruno Peres; Furtini Neto,Antonio Eduardo; Moretti,Bruno da Silva; Stehling,Eduardo de Castro; Sousa,Thaiana Marinha Almeida de. |
| In order to evaluate fertilizers doses in different substrates for growth and development of clonal matrices of Australian Red Cedar [Toona ciliata var. australis (F. Muell.) Bahadur], an experiment was conducted in a greenhouse. Five substrates were evaluate, with proportions by volume, the first consisting of 100% of Multiplant florestal®, the second of 50% vermiculite, 20% carbonized rice hulls, 20% soil and 10% coconut fiber, the third with 50% soil and 50% sand, the fourth was composed by 50% Multiplant florestal®, 10% soil and 40% coconut fiber and the fifth with 65% of Multiplant florestal®, 25% vermiculite and 10% carbonized rice hulls. The fertilizers doses applied were 0.0; 0.3; 0.6; 1.2; 2.4 of fertilization suggested by Malavolta (1980) for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Toona ciliata; Plant nutrition; Fertilization. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000300003 |
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| Oliveira,Jeferson Eder Ferreira; Rodrigues,Paulo Borges; Alvarenga,Renata Ribeiro; Zangeronimo,Márcio Gilberto; Lima,Gustavo Freire Resende. |
| The need for suitable diets in chickens, considering the ideal protein concept associated with phytase, is important in order to improve the productivity of birds. The aim of this study was to assess the need for the correction of amino acid levels in the diets of broilers, by using different combinations of crude protein (CP) supplemented with phytase. For performance, eight days old Cobb 875 broiler chicks, with initial body weights of 155 ± 1.4g were used. The birds were distributed in a completely randomised design with seven treatments (nutritional plans) and five replicates of 25 birds. For the metabolism trial, 300 birds were selected which were also distributed using the same design, but with five, four and three birds per experimental stage: 8-21... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carcass characteristics; Ideal protein; Nutrition; Performance. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000200012 |
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| Reis,Aliny Aparecida dos; Teixeira,Marcelo Dias; Acerbi Júnior,Fausto Weimar; Mello,José Marcio de; Leite,Lucilia Rezende; Silva,Sérgio Teixeira da. |
| The Permanent Preservation Areas (PPAs) are considered essential for the maintenance of local biodiversity, so that your protection is regulated by the Brazilian legislation. This work had the objective of delimiting permanent preservation areas according to determinations of the current Brazilian environmental legislation, and identify the occurrence of conflict between the land use and legislation in Lavras county, MG, by combination of technologies of remote sensing and geographic information systems. The PPAs correspond to 42.33% of Lavras county's territory. The conflict between the land use and environmental legislation occurs in 63.48% of PPAs' territory, mainly corresponding to the pasture areas, bare soil and agriculture. The PPAs of tops of hills... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environmental legislation; Land cover; Geoprocessing. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000300005 |
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| Carvalho,Tereza Cristina de; Krzyzanowski,Francisco Carlos; Ohlson,Osvaldo de Castro; Panobianco,Maristela. |
| The tetrazolium test is widely used for seed vigor assessment of various plant species. For wheat, however, there is no methodology specifically recommended. This study aimed at determining an efficient procedure to evaluate vigor of wheat seeds by this test; besides allowing the establishment of seed quality classes. Thus, four different wheat seed lots were assessed by determining the moisture content and through tests of germination, accelerated aging, and field seedling emergence. The following methodologies were assessed: 1) longitudinal bisection of seed, with subsequent placement of the two halves on filter paper moistened with a 1.0% tetrazolium solution, at 30º C, for 2 h; 2) longitudinal bisection, with subsequent immersion of one seed half into... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum; Physiological quality; Viability. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000600002 |
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| Villalobo,Ariel; González,Justo; Santos,Ramón; Rodríguez,Romelio. |
| Pineapple producing countries lack good quality propagation material to expand cultivars into new areas. Previously, research protocols may increase the offer of high quality plantlets and speed the introduction of new pineapple cultivars. The present work is to evaluate the morpho-physiological changes in plantlets of pineapple [Ananas comosus (L.) Merr. 'MD-2'] during the acclimatization phase. Plantlets were acclimatized under 80% relative humidity, 25.5 °C temperature and photosynthetic photon flux of 400-500 µmol m-2 s-1 as average for 45 d under natural photoperiods. All measurements (plant length, number of leaves and roots, fresh weight, width and length of leaf 'D', net photosynthesis and total transpiration rate) were carried out at the end of in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chlorophyll; Ex vitro conditions; Photosynthesis; Transpiration. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000600004 |
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| Martins,André Rosa; Monteiro,Ricardo Lemos; Burkert,Janaína Fernandes de Medeiros; Burkert,Carlos André Veiga. |
| In a single-stage process with the simultaneous addition of β-galactosidase and lactic culture, the lactose conversion, the processing time, viscosity and syneresis were evaluated. Fermentation was promoted by lactic culture containing two probiotic microorganisms, Bifidobacterium animalis and Lactobacillus acidophilus, associated with the typical microorganisms of yogurt. An enzymatic preparation containing β-galactosidases from Kluyveromyces lactis and Aspergillus niger was used. A central composite design (2³ trials plus three central points) was proposed in order to evaluate the effects of initial lactose concentration, enzyme concentration and the time of addition of the enzyme. The following conditions were established: initial lactose concentration... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Enzymatic catalysis; Lactose hydrolysis; Yogurt physical properties; Β-galactosidase. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000500008 |
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| Silva,Elen Alvarenga; Gomes,João Bosco Vasconcellos; Araújo Filho,José Coelho de; Vidal-Torrado,Pablo; Cooper,Miguel; Curi,Nilton. |
| The scarcity of comprehensive characterizations of soils associated to gentle summit depressions of the Northeastern Brazilian Coastal Plains justifies this work, which had as objective to provide basic information for the more diverse agricultural and non-agricultural uses. For that, representative soils (Spodosols or similar soils) from these environments were selected in Alagoas, Sergipe and Bahia states. This approach included characterization of morphological, mineralogical and micromorphological properties of the soil profiles, employing standard procedures. The morphological characterization corroborated the effect of the podzolization process during the formation of these soils. The mineralogy of the clay fraction of these soils was basically... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sand-quartzous soils; Cementation; Hydromorphism; Podzolization; Barreiras Formation. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000500003 |
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| Tzaskos,Danilla Fernanda; Marcovicz,Crislaine; Dias,Nivea Maria Piccolomini; Rosso,Neiva Deliberali. |
| Glyphosate is a systemic, post-emergent, non-selective herbicide widely used in agriculture. The objective of this study was to develop a method for sample preparation, to partially purified natural water samples contaminated with residues of glyphosate, and to quantify them by derivation and spectroscopically. To assess the accuracy of the method, samples of water from an artesian well and from a stream were fortified with known amounts of glyphosate. The concentration of glyphosate was determined using a standard curve concentration range from 4 to 14 mg L-1. From the concentration of glyphosate recovered, in both samples of fortified water it was found that DOWEX MWA-1 resin and NaCl 0.100 mol L-1 eluent were effective in the purification of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Residues; Spectroscopic studies; Systemic herbicide. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000400003 |
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| Moya,Róger; Solano,Marco. |
| In Costa Rica, there has been a growing interest to use pineapple fiber from plant, for which current processes need to be improved or new processes need to be developed, with emphasis on drying methods. This work presents the design and evaluation of the behavior of a prototype portable solar dryer in four sites of Costa Rica. The design describes the main parts of the dryer, as well as how they were constructed. The behavior was evaluated according to temperature and relative humidity inside e outside the chamber, and the influence of direct and indirect solar radiation. In order to achieve improved dryer efficiency, a dehumidifier was used to control relative humidity, and a heating system was implemented during the hours of low temperature, low solar... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Air drying; Relative humidity; Moisture content; Temperature; Solar radiation. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000600009 |
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| Guimarães,Ívina Catarina de Oliveira; Leão,Maria Helena Miguez da Rocha; Pimenta,Carlos José; Ferreira,Larissa de Oliveira; Ferreira,Eric Batista. |
| This study deals with development of a "dulce de leche" (DL) with coffee, with low caloric content and functional properties. Through rotational central composite design, eleven DLs were formulated with different polydextrose and sucralose levels. The results were analyzed by means of response surface and ANOVA. The addition of polydextrose led to the increase in moisture and water activity and reduction in the ash and soluble solids contents. In the formulations with greater levels of sucralose and polydextrose, there was an increase in the ash, acid and fiber content. Greater yield was achieved with greater concentrations of polydextrose and less substitution of sucrose by sucralose, allowing development of a new functional product with low caloric... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Prebiotics; Polydextrose; New product development. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000200008 |
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| Castilha,Leandro Dalcin; Pozza,Paulo Cesar; Nunes,Ricardo Vianna; Lazzeri,Doglas Batista; Somensi,Marcelo Luiz; Pozza,Magali Soares dos Santos. |
| The ideal protein concept for pigs has allowed reducing levels of crude protein in the diet, since synthetic amino acids are included because the branched chain amino acids may be limiting. In order to determine the digestible isoleucine requirement for gilts from 15 to 30 kg, a performance assay was accomplished, using 40 crossbreed gilts of high genetic potential, averaging 15.00 ± 0.52 kg of body weight, alloted in a randomized blocks design, consisting of five treatments (0.45, 0.52, 0.59, 0.66, 0.73% of digestible isoleucine), four replicates and two animals per experimental unit. Performance traits were determined and at the end of the experiment one animal per experimental unit was slaughtered to determine carcass composition and organs weight.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Swine nutrition; Branched chain amino acids; Nutritional requirements; Carcass composition. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000400009 |
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| Ematné,Hugo Junqueira; Souza,João Cândido de; Biudes,Gustavo Barnabé; Nunes,José Airton Rodrigues; Guedes,Fernando Lisboa. |
| Popcorn is widely consumed in the south of Minas Gerais; however, up to now no specific breeding program for the region has been carried out. Recurrent selection (RS) is a viable alternative for breeding of this crop; nevertheless, it is necessary to frequently evaluate the progress achieved. Consequently, the purpose of this work was to assess the genetic progress obtained after two cycles of RS for the traits of popping expansion (PE) and grain yield (GY). Cycles one and two of the UFLA - E and UFLA - R populations, the original population (UFLA) and two controls were assessed. The experiment was conducted at the UFLA experimental farm in a randomized block design with eleven replications; ten agronomic traits, including PE and GY, were assessed. Gains... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Popcorn; Popping expansion; Grain yield. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000100003 |
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| Peres,Julio Cesar Fernandes; Carvalho,Luciana Retz de; Gonçalez,Edlayne; Berian,Luis Otávio Saggion; Felicio,Joana D´arc. |
| Seaweeds are subject to numerous biological interactions and sometimes to extreme abiotic conditions, so they have developed among other defense mechanisms, the ability to produce biologically active substances. Thus, these organisms produce mainly terpenes and phenols. Among others, the antifungal activity, due to its importance in human and animal health and the production of agricultural products, has been the subject of several studies. In the present work, this activity was investigated in ten seaweeds extracts, by direct bioautography assays, compared to Colletotrichum lagenarium and disk diffusion assay, compared to Aspergillus flavus. The organisms studied were: Stypopodium zonale, Laurencia dendroidea, Ascophyllum nodosum, Sargassum muticum,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Etanolic extract; Colletotrichum lagenarium; Aspergillus flavus. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000300004 |
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| Ávila,Fabricio William; Faquin,Valdemar; Silva,Douglas Ramos Guelfi; Bastos,Carla Elisa Alves; Oliveira,Nilma Portela; Soares,Danilo Araújo. |
| The effects of foliar and soil applied phosphite on grain yield in common bean (Phaseolus vulgaris L.) grown in a weathered soil under low and adequate phosphate availability were evaluated. In the first experiment, treatments were composed of a 2 x 7 + 2 factorial scheme, with 2 soil P levels supplied as phosphate (40 e 200 mg P dm-3 soil), 7 soil P levels supplied as phosphite (0-100 mg P dm-3 soil), and 2 additional treatments (without P supply in soil, and all P supplied as phosphite). In the second experiment, treatments were composed of a 2 x 3 x 2 factorial scheme, with 2 soil phosphate levels (40 e 200 mg P dm-3 soil), combined with 3 nutrient sources applied via foliar sprays (potassium phosphite, potassium phosphate, and potassium chloride as a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phaseolus vulgaris; Tropical soil; Foliar fertilizer; Plant nutrition. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000600006 |
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| Registros recuperados: 13.807 | |
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