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Land use and the hydro-sedimentological response of a watershed in a semiarid region. = Uso da terra e resposta hidrossedimentológica de microbacia no semiárido
Helba Araújo de Queiroz Palácio,José Ailton da Silva Filho,Eunice Maia de Andrade,Julio César Neves dos Santos
Agro@mbiente On-line , 2012,
Abstract: In northeastern Brazil, with its semi-arid climate and an environment full of contrasts, side by side with the intensive exploitation of the natural resources by agricultural companies, it can be seen both agricultural and livestock farming being practised by small-holders as a way of earning their living. This exploitation is generally unsustainable, resulting in a scarcity of land and water resources, and having serious negative effects on this region. The objective of this research was to analyse the influence of anthropic action on the hydro-sedimentological responses of an experimental watershed with transitory drainage, located in the semiarid region of Ceará, during the years under study of 2009 and 2010: the catchment area of theobserved watershed being 2.8 ha. In 2009, the first year of the study, the native caatinga vegetation of the area was maintained unaltered; the following year a type of land use common to the region was applied, consisting of the removal of all vegetation followed by burning the land and cultivation of the grass Andropogon gayanus Kunt for the production of pasture. The rainy season of 2009 presented a total rainfall of 1,063 mm, 23.1% of the total precipitation being converted to surface runoff and resulting in a sediment yield of 730 kg ha-1. In 2010, due to the lower volume precipitated (809 mm), total runoff corresponded to 13.9%, but the sediment yield was maximized, with a total of 2,832 kg ha-1, this being 72% higher than in the previous year and demonstrating the negative effect of applied management. = Na regi o Nordeste do Brasil, com clima semiárido e ambiente de contrastes, verifica-se lado a lado a explora o intensiva dos recursos naturais por empresas agrícolas e a agricultura e pecuária praticada por pequenos produtores como forma de garantir a subsistência. Estas explora es ocorrem na grande maioria de forma insustentável, resultando na escassez dos recursos solo e água com sérios reflexos negativos nessa regi o. Objetivou-se com esta pesquisa analisar a influência da a o antrópica sobre as respostas hidrossedimentológicas em microbacia experimental de escoamento efêmero no semiárido cearense durante os anos de 2009 e 2010. A área de drenagem da microbacia estudada é de 2,8 ha. No primeiro ano de estudo (2009) a área foi mantida inalterada com vegeta o de caatinga nativa e no ano seguinte foi aplicado um tratamento de uso do solo comum na regi o, que consta de supress o da vegeta o, seguida de queimada e cultivo de gramínea Andropógon gayanus Kunt para a produ o de pastagem. A esta o chuvosa de 200
Demência reversível e quedas associadas ao biperideno
Rigo, Julio César;Rigo, Juliana Ferrari de Oliveira;Faria, Breno Cezar;Santos, Vitorino Modesto dos;
Revista de Psiquiatria Clínica , 2006, DOI: 10.1590/S0101-60832006000100004
Abstract: anticholinergic drugs may cause adverse effects, more often in the aged patients. we describe a case of reversible dementia and falls, associated with the use of biperiden. the patient was an 82-year old woman, admitted in a geriatric home because of frequent falls at home, progressive cognitive deficit and tremor of extremities with movement, in addition to remarkable loss of autonomy. as a matter of fact, she presented an essential tremor, which was mistakenly diagnosed as parkinson disease and treated with biperiden; furthermore, she developed a drug-induced cognitive deficit, erroneously interpreted as alzheimer disease. after submitted to the specialized evaluation, the anticholinergic drug was discontinued and there was a complete improvement of cognition changes; the essential tremor is under control with use of propranolol. when evaluating a patient with cognitive deficit, the clinician must discard possible causes of reversible dementia, especially the iatrogenic group.
GOVERNAN A CORPORATIVA: PERCEP O DAS EMPRESAS QUANTO àS PRáTICAS DE GOVERNAN A CORPORATIVA E A ENTRADA NO NOVO MERCADO DA BOVESPA
SANTOS, Carolina M. dos,SILVA, Julio César Celestino,SILVA, Rodrigo Augusto Celestino
Nucleus , 2008,
Abstract: the profit of efficiency in the management ally to the increase of the liquidity of the BrazilianStock Market and to its importance in the financing of the companies’ results in the biggest transparency of theinformation divulged by the companies. Nowadays, the expressive amount of companies that use practical ofCorporative Governance suggests that such methods result in benefits for the company that adopt them. Thebiggest valuation of the actions of the companies that compose the IGC (Index of Corporative Governance) andprofits with bigger visibility, minor capital costs and improve of professionalization in the management, suggestthat the companies get advantages when entering the New Market maximum level of Corporative Governancein the Brazilian market. Practical of Corporative Governance contribute to the increase of the trustworthinessof the investors, collaborators, financial institutions and market in general. Knowing the importance of practical of Corporative Governance, the objective of the present work was to identify the perception of the companiesin the New Market of the S o Paulo Stock Exchange, approaching the impacts of the Corporative Governance,having as main focus the companies listed in the New Market of BOVESPA. In such a way, a questionnairewith questions was elaborated with specified questions about benefits and obstacles faced by Governance andthe entrance and maintenance in new segment of listing of BOVESPA, the New Market. It was verified that thecompanies when adopting Corporative Governance possess expectation of valuation and increase of liquidity ofthe actions, that, in fact, occurs after implantation of these practical. It is also noticed that impediments exist inrelation to the implantation and maintenance of the Governance, as awareness of collaborators, time and excessof legal requirements for performance in the differentiated pursuings of listing. The entrance in the New Marketof BOVESPA has advantages to valuation of the actions, the growth of the interest of foreign investors andthe visibility of the company in the market. Its impediments are related to the difficulty of granting equality ofconditions to minorities and to possess all actions in negotiation, being usual. It is standed out that to form anAdvice of Administration and Statutory Audit Committee, in many independent cases, an becomes obstacle facedfor the companies.O ganho de eficiência na gest o aliado ao aumento da liquidez do Mercado de Capitais Brasileiro e àsua importancia no financiamento das empresas resultam na maior transparência das informa es div
DESVIOS ANGULARES EM POTROS DA RA A CRIOULA NA REGI O SUL DO RS DO PRIMEIRO AO OITAVO MêS DE VIDA SOB MANEJO EXTENSIVO DE CRIA O
Julio César Paganela,Carlos Anselmo dos Santos,Pedro Kutscher Ripoll,Cahue da Rosa Paz
Ciência Animal Brasileira , 2010,
Abstract: The conformation of the limbs of foals, future athletes, has become the focus of attention of physicians and breeders in the last 20 years due to the contribution of a poor conformation to a higher incidence of musculoskeletal disorders and consequently greater economic recovery of individuals with correct angulations. The aim of this study was to identify the main angulation disorders of Crioulo foals from the first to the eighth month of life, highlighting those that are the most frequent. A total of 77 foals of the 2007 generation were evaluated, they were chosen by a process of simple random sampling of a total of 164 foals raised on the properties analyzed. The study was conducted in two stages, the first evaluation was performed with animals within 1 and 4 months of age and the second with the same foals aged 5 and 8 months. Considering the two evaluations, the main angular defect observed was toed-in, which was observed in 47 foals. The identification of defects in angulations after birth or its appearance is extremely important to the veterinary, allowing immediate intervention by performing trimming and/or changes in management or surgery for correction of angular deviation.
Perdas de solo e nutrientes em área de Caatinga decorrente de diferentes alturas pluviométricas. = Soil and nutrient losses in Caatinga Forest due to rainfall depths.
Francisco Antonio de Oliveira Lobato,Eunice Maia de Andrade,Ana Célia Maia Meireles,Julio Cesar Neves dos Santos
Agro@mbiente On-line , 2009,
Abstract: Objetivou-se com este estudo avaliar as perdas de solo e nutrientes por eros o hídrica em quatro áreas sob vegeta o de Caatinga com diferentes coberturas vegetal em três alturas pluviométricas. Foram instalados 24 coletores de solo distribuídos em quatro microbacias (A, B, C e D) localizadas em uma área de caatinga no município de Iguatu, Ceará. Os coletores eram espa ados 3 m entre si e cada um representava uma área de 30 m2. As coletas foram realizadas a cada 24 horas no período de janeiro a maio de 2008 (período chuvoso). O solo coletado era conduzido ao Laboratório de Solos do Instituto Federal de Educa o, Ciência e Tecnologia (IFCE), campus Iguatu, seco em estufa e agrupados de acordo com os seguintes intervalosde altura pluviométrica como se segue: < 30 mm, entre 31 a 50 mm e > 51 mm. Para quantificar os nutrientes perdidos, foram feitas análises químicas do solo no Laboratório de água e Solo da Embrapa Agroindústria Tropical. Os elementos analisados foram: Ca, Mg, K, Na, P, Fe, Mn, N e matéria organica (MO). Os resultados mostraram que a cobertura rasteira mostrou maior eficiência na redu o das perdas de solo e nutrientes, visto que as áreas que apresentavam apenas cobertura rasteira tiveram menores perdas; a cobertura vegetal mostrou-se mais importante no controle do processo de eros o e as maiores perdas registradas foram da matéria organica. = The aim of this study was to evaluate the losses of soil and nutrients due to rainfall erosion in the Caatinga Forest by investigating three different rainfall depths. The cover vegetation effect on the soil losses was also analyzed. Twenty-four soil collectors were installed in four small watersheds (A, B, C, and D) located in the city og Iguatu, Ceará, Brazil. The distance bewteen each other collectors was 3 and each was representative of an area of 30 m2. Samples were collected at intervals of 24 hours duirng January-May/2008 (rainy season). The soil samples were forced dried by air oven in the Soil Laboratory of the Instituto Federal de Educa o, Ciência e Tecnologia (IF-CE) and grouped according to the following rainfall depths: < 30 mm, bewteen 30 to 50 mm, and > 50 mm. To quantify the soil nutrient losses, the following elements were analyzed at the Soil and Water Laboratory of the Embrapa Agroindústria Tropical: Ca, Mg, K, Na, P, Fe, Mn, N, and Organic Matter (OM). The results demonstrated that the brush vegetation presented higher efficiency than canopy cover in the reduction of soil and nutrient losses. While the vegetation cover was more important to control the erosion process, and the amo
Vesicular-arbuscular-/ecto-mycorrhiza succession in seedlings of. Eucalyptus spp.
Santos Vera Lúcia dos,Muchovej Rosa Maria,Borges Arnaldo Chaer,Neves Júlio César L.
Brazilian Journal of Microbiology , 2001,
Abstract: The occurrence of vesicular-arbuscular mycorrhizae (AM) and ectomycorrhizae (ECM) in the same root system was observed when species of Eucalyptus urophylla S.T. Blake, E. citriodora Hook f., E. grandis W. Hill ex Maiden, E. cloeziana F. Muell. and E. camaldulensis Dehnh were simultaneously inoculated with Glomus etunicatum Becker & Gederman and Pisolithus tinctorius (Per.) Cocker & Couch, isolate Pt 90A. The succession between the two fungi was observed. In general ectomycorrhizal colonization increased followed by a decrease in AM. Pisolithus tinctorius was favored in simultaneous inoculation with G. etunicatum, and the positive effect of the simultaneous inoculation of both fungi in the percent colonization by the AM fungus occurred up to 60 days after inoculation. After 120 days, colonization of roots by G. etunicatum decreased in the presence of P. tinctorius. When inoculated simultaneously, the proportion of AM and ECM varied with evaluation time, while the combined percentage of mycorrhizal roots approached the maximum and remained more or less constant after 60 days, suggesting that there could be competition between the fungi for limiting substrate. The maximum percent mycorrhizal colonization varied with Eucalyptus species and the highest value was observed for E. camaldulensis, followed in order by E. citriodora, E. urophylla, E. grandis and E. cloeziana.
Runoff and soil and nutrient losses in semiarid uncultivated fields
Santos, Julio Cesar Neves dos;Palácio, Helba Araújo de Queiroz;Andrade, Eunice Maia de;Meireles, Ana Célia Maia;Araújo Neto, José Ribeiro de;
Revista Ciência Agron?mica , 2011, DOI: 10.1590/S1806-66902011000300030
Abstract: although water erosion is the principle agent responsible for soil degradation, field data on the impacts of erosion, due to high operational costs and measurement difficulties, are scarce, especially in semiarid regions. in this context, the aim of this study was to evaluate runoff and soil and nutrient losses in uncultivated areas in the semiarid region of the state of ceará in brazil. the experiment was conducted in a 20 m2 erosion plot that was uncultivated and populated with herbaceous plants. data were collected during the rainy season from january to may 2009. monthly water losses from overland flow ranged from 3.4 to 168.9 mm, representing 1.8 to 42.3% of the total monthly rainfall for january and april, respectively. soil loss from erosion totaled 2,166.6 kg ha-1. in february, soil losses were 834.3 kg ha-1, corresponding to 38.5% of the total value. the rainfall erosivity index (ei30) was 5,716.4 mj mm ha-1 h-1. the observed high variability of soil losses in individual events was influenced mainly by the antecedent soil water content. although this study used only one year of observations, the findings are important for land use planning, especially in the semiarid region of brazil, where datasets are scarce.
Vesicular-arbuscular-/ecto-mycorrhiza succession in seedlings of. Eucalyptus spp.
Santos, Vera Lúcia dos;Muchovej, Rosa Maria;Borges, Arnaldo Chaer;Neves, Júlio César L.;Kasuya, Maria Catarina M.;
Brazilian Journal of Microbiology , 2001, DOI: 10.1590/S1517-83822001000200002
Abstract: the occurrence of vesicular-arbuscular mycorrhizae (am) and ectomycorrhizae (ecm) in the same root system was observed when species of eucalyptus urophylla s.t. blake, e. citriodora hook f., e. grandis w. hill ex maiden, e. cloeziana f. muell. and e. camaldulensis dehnh were simultaneously inoculated with glomus etunicatum becker & gederman and pisolithus tinctorius (per.) cocker & couch, isolate pt 90a. the succession between the two fungi was observed. in general ectomycorrhizal colonization increased followed by a decrease in am. pisolithus tinctorius was favored in simultaneous inoculation with g. etunicatum, and the positive effect of the simultaneous inoculation of both fungi in the percent colonization by the am fungus occurred up to 60 days after inoculation. after 120 days, colonization of roots by g. etunicatum decreased in the presence of p. tinctorius. when inoculated simultaneously, the proportion of am and ecm varied with evaluation time, while the combined percentage of mycorrhizal roots approached the maximum and remained more or less constant after 60 days, suggesting that there could be competition between the fungi for limiting substrate. the maximum percent mycorrhizal colonization varied with eucalyptus species and the highest value was observed for e. camaldulensis, followed in order by e. citriodora, e. urophylla, e. grandis and e. cloeziana.
Produtividade e aspectos nutricionais de plantas de soja cultivadas em solos de cerrado com diferentes texturas
Santos, Flávia Cristina dos;Novais, Roberto Ferreira;Neves, Júlio César Lima;Foloni, José Marcos;Albuquerque Filho, Manoel Ricardo de;Ker, Jo?o Carlos;
Revista Brasileira de Ciência do Solo , 2008, DOI: 10.1590/S0100-06832008000500023
Abstract: in the recent years soybean cultivation has expanded largely in areas with sandier textures in the cerrado. this has raised questions as to the sustainability and technical, economic and environmental viability of soybean production in these soils. moreover, differences in the yield potential and nutrient dynamics in soil and plants are expected along a variation of soil texture. this study aimed to evaluate yield and nutritional aspects of soybean plants grown in cerrado soils with different textures. two databanks with information on soybean plants and soils with different clay contents (values between 30 and 840 g kg-1) were used. the data were plotted and adjusted regression equation were used to establish relationships between yield and soil texture and, in some cases the effect was evaluated within separate soil texture classes: sandy, sandy-loam, clayey and very clayey, aside from the leaf nutrient contents with texture and yield. soybean yield tended to increase with the clay content. in the separate texture classes, the same trend was verified in the sandy and clayey classes only. in the sandy-loam and very clayey classes, yields tended to decrease when the soils had higher clay contents. the nutrient-soil texture and nutrient-soybean yield relationships were varied. interestingly, the p and s leaf contents increased with clay contents to values of 227 and 426 g kg-1, respectively, and decreased thereafter. potassium, ca and mg were positively and significantly related with clay content and soybean yield, whereas soil k+ and ca2+ was limited for soybean grown in sandier soils. the micronutrients, aside from b, were not yield-limiting. soybean yield is independent of the soil texture; climatic conditions and adequate soil management seem to be the main determinant factors of the crop responses. in sandy soils more attention should be paid to the fertilization management with k, ca and b, wich were the most limiting elements for soybean yield.
Caracteriza??o da estrutura da vegeta??o numa pastagem natural do Bioma Pampa submetida a diferentes estratégias de manejo da oferta de forragem
Neves, Fabio Pereira;Carvalho, Paulo César de Faccio;Nabinger, Carlos;Carassai, Igor Justin;Santos, Davi Teixeira dos;Veiga, Gustavo Velasquez da;
Revista Brasileira de Zootecnia , 2009, DOI: 10.1590/S1516-35982009000900007
Abstract: the objective of this trial was to investigate the spatio-temporal dynamics of feeding sites stratified by strips of herbage mass and sward height, and the percentage of effectively grazed area, herbage growth rate and dry matter yield of a natural pasture from pampa biome managed with different herbage allowance management strategies. a randomized block design with two replications was used with three fixed herbage allowance (8, 12 and 16%) and three herbage allowance variables throughout the year (8-12%, 12-8%, and 16-12%), with first value corresponding to the spring season. the 8% fixed herbage allowance presented greater effectively grazed area, but the average height and herbage mass were lower than in other allowances. the highest herbage allowance, 16% and 16-12%, presented 9.0 cm average sward height and herbage mass of 2,000 kg/ha dry matter, and a smaller effectively grazed area than the 8% and 8-12% herbage allowances. in spite of the different management strategies used, between 60 and 70% of feeding sites occurred in strips considered to constrain animal intake, except in the 16% and 16-12% treatments, in which a smaller frequency of feeding sites in strips lower than 6.0 cm was registered. in general, the feeding sites were concentrated on strips <6 cm sh, and herbage masses <1000 and 1000-1500 kg/ha dry matter, in all allowances. however, at 16-12% and 8-12% herbage allowances, the feeding sites were better distributed among the strips for herbage mass and sward height.
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