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Search Results: 1 - 10 of 230827 matches for " Cássio Ant?nio;Fidalski "
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Variabilidade e correla??o espacial de propriedades físicas de solo sob plantio direto e preparo convencional
Schaffrath, Valter Roberto;Tormena, Cássio Antnio;Fidalski, Jonez;Gon?alves, Antnio Carlos Andrade;
Revista Brasileira de Ciência do Solo , 2008, DOI: 10.1590/S0100-06832008000400001
Abstract: soil management systems modify the spatial distribution of soil physical properties. the objectives of this study were to verify the spatial dependency and co-relationship of some soil physical properties by data fitting to individual and cross-semivariograms in an oxisol (typic haplorthox) under no-till and conventional tillage, in campo mour?o, state of parana, brazil. in april 2004, 128 undisturbed soil samples were collected in a 3 x 5 m grid, in the middle of the 5-0.15 m layer. the following soil physical properties were measured: soil bulk density, macroporosity, microporosity, total soil porosity and soil water content at a tension of 100 hpa (field capacity). the spatial variability in the single semivariogram of these soil physical properties was higher and the range in no-tillage was smaller than in conventional tillage. on the other hand, the cross-semivariogram of soil bulk density and total porosity or field capacity indicated spatial co-relationships with lower spatial variability and higher ranges in no-tillage than conventionally tilled soils. the cross-semivariogram suggested that soil bulk density showed a spatial co-relationships with the other soil physical properties in both soil management systems studied.
Contribui??o teórico-conceitual para a pesquisa avaliativa no contexto de vigilancia da saúde
Arreaza,Antnio Luis Vicente; Moraes,José Cássio de;
Ciência & Saúde Coletiva , 2010, DOI: 10.1590/S1413-81232010000500037
Abstract: initially this article revises some of the conceptual and operational elements on evaluative research by gathering knowledge and action fields on public health practices. such concepts are taken according to a wider conception of quality. then, the article intends to arrange a theoretical model design considering the proposition for implementation of health surveillance actionsan image-objective definition of organization and integration of health polices and practices based on hierarchic and local logic also take place. finally, becomings and challenges around the theory in the health evaluation field turn to be the aim of our reflection in order to enable the production of knowledge and approaches to construct logic models which reveals the complexity of interventionist objects as well as its transforming nature of social practices.
Influência da densidade do solo na estimativa da umidade em um nitossolo vermelho distroférrico, por meio da técnica de TDR
Gon?alves, Antnio Carlos Andrade;Trintinalha, Marcos Antonio;Tormena, Cássio Antnio;Folegatti, Marcos Vinicius;
Revista Brasileira de Ciência do Solo , 2011, DOI: 10.1590/S0100-06832011000500009
Abstract: among the techniques for soil moisture evaluation, the use of time domain reflectometry (tdr) stands out, which consists of an indirect, non-destructive, fast and accurate method less dependent on environmental factors. however, works carried out after its applications suggest the influence of factors related to soils structural and mineralogical characteristics, which makes necessary the site calibration for the tdr proper functioning. the aim of this work was to study the influence of bulk density (ds) on the volumetric soil water content (θ), using the tdr technique in a dystroferric red ultisol. a model that expresses the relationship between the soil dielectric constant (ka) and θ was adjusted by multiple polynomial regression, with the incorporation of ds for the estimation of its coefficients. the results showed that in this soil, the calibration model should take into account the effect of ds, without which the quality of the moisture estimates from the dielectric constant measurements is compromised. the results also highlighted the high sensitivity of tdr to the variation of soil moisture, making it possible the accurate use of this technique in actions involving the monitoring of the variation in soil moisture. the results indicated the need for further studies on the use of tdr in tropical soils.
Avalia??o de constituintes séricos em eqüinos e muares submetidos à prova de resistência de 76km, no Pantanal do Mato Grosso, Brasil
Ribeiro, Cássio Ricardo;Martins, Edivaldo Aparecido Nunes;Ribas, José Antnio Silva;Germinaro, Ademir;
Ciência Rural , 2004, DOI: 10.1590/S0103-84782004000400018
Abstract: the alterations in serum concentrations of sodium, potassium, ionized calcium, urea, creatinine, glucose, creatine kinase (ck), aspartate aminotransferase (ast) and lactate dehydrogenase (ldh) were studied in fifteen equines and five mules, participating in a 76km, 2-day long endurance competition, in the pantanal of mato grosso state - brazil. the blood samples were collected in the first day, before the beginning of the competition (t1); at the end of the first day, after covering 38km (t2); the second day, before the beginning of the ride (t3); and at the closure of the competition (t4). in the horses a decrease was observed in serum concentration of sodium and ldh in t4 with a return to basal values in t4. potassium and calcium presented a decrease in concentration in t2. there was an increase of serum concentration of urea and creatinine in t2 and of glucose in t3. the serum values of ck and ast remained similar to t1. in the mules, the serum concentrations of sodium, calcium, urea, glucose and ldh presented a profile similar to the equines, while potassium, creatinine, ck and ast remained near t1 values. a difference was not observed between equines and mules serum biochemistry. it can be concluded that the studied endurance race did not impose duration and/or intensity above the physiological conditions of the participating animals.
Degrada??o física de um Latossolo Vermelho utilizado para produ??o intensiva de forragem
Giarola, Neyde Fabíola Balarezo;Tormena, Cássio Antnio;Dutra, Adriano Cassol;
Revista Brasileira de Ciência do Solo , 2007, DOI: 10.1590/S0100-06832007000500004
Abstract: the intensive traffic of agricultural machines on soils used for hay production can result in soil quality degradation. the hypothesis evaluated was that systems of intensive hay production cause soil physical degradation. the objective of this study was to quantify the soil physical properties and morphological attributes to recognize and identify the soil physical degradation of a red latosol (typic haplorthox) cropped with tifton 85 forage (cynodon spp) for hay production, in western paraná state, southern brazil. a native forest area adjacent the experimental area was used as reference for soil physical quality. morphological attributes were described in both soils and, in the a and bw horizons, the following soil physical properties were measured: bulk density, porosity and pore size distribution, and soil resistance to penetration (srp). the analysis of these variables confirmed the hypothesis. soil morphological description showed the occurrence of soil compaction as well as drastic alterations in macromorphological characteristics at a depth of 0.15 m in the soil under forage cultivation for hay production. reductions in soil total porosity and macroporosity were verified as well as increases in soil bulk density and srp. under intensive forage production the air-filled porosity in the soil surface layer was found to be lower than 10 % and srp over 2.5 mpa. the morphological attributes only allowed identifying where soil physical modifications occurred, while the soil physical properties indicated the degree of the soil physical degradation. the srp curve clearly demonstrated the soil physical degradation in the surface layer of the soil used for cultivated with forage for hay production.
Preparo do solo em áreas de produ??o de gr?os, silagem e pastejo: efeito na resistência tênsil e friabilidade de agregados
Bavoso, Marina Araújo;Giarola, Neyde Fabíola Balarezo;Tormena, Cássio Antnio;Pauletti, Volnei;
Revista Brasileira de Ciência do Solo , 2010, DOI: 10.1590/S0100-06832010000100023
Abstract: the understanding and quantification of soil use and management on the soil physical quality are important to develop and select sustainable agricultural systems. the purpose of this study was to evaluate the structural quality of a clayey brazilian oxisol under different production and soil tillage systems by measuring the tensile strength (ts) and to quantify aggregate friability (f). the study was conducted in castro, paraná state, in southern brazil, using three production systems and seven soil tillage types, in a randomized block design. the following production systems were evaluated: (ps i) - ryegrass for soil cover (winter) and corn for grain production (summer); (ps ii) ryegrass for haylage/silage and corn for grain production; and (ps iii) - ryegrass for grazing and corn for grain production. seven types of soil tillage were evaluated in each system: (g1) - plow harrow in winter, depth 0.15 m; (g2) - plow harrow in winter and summer, depth 0.15 m; (plow) - disk plow, depth 0.20 m; (laser wing subsoiler) - subsoiler wing tips, to a depth of 0.45 m; (subsoiler) - subsoiler, depth 0.80 m; (aerator) - soil aerater aeromix?; and (nt) - no-tillage, where ryegrass was sown using a double disc and corn with a coulter. from each experimental plot soil blocks (0.20 x 0.15 x 0.07 m) were taken which were broken up by hand in their natural aggregates. then, the aggregates were air-dried for 24 h and passed through sieves with diameters of 12.5 and 19 mm. forty aggregates from each block were selected and tested for indirect tension to determine ts and quantify f. ts was influenced by the production systems and soil tillage types. the lowest and the highest ts values were found in the soil under grazing and the nt system, respectively. friability was less sensitive to differentiate production systems and soil tillage types.
Single institutional retrospective analysis: treatment of choroidal melanomas with cobalt-60 brachytherapy
Pellizzon Antnio Cássio Assis,Salvajoli Jo?o Victor,Novaes Paulo Eduardo,Fogaroli Ricardo
Arquivos Brasileiros de Oftalmologia , 2004,
Abstract: PURPOSE: To evaluate the outcome of patients with choroidal melanoma treated with conservative therapy with brachytherapy (episcleral Co-60 plaque therapy) at the "Hospital do Cancer" S o Paulo, Brazil. METHODS: We evaluated 102 patients consecutively treated from January, 1999 to June, 1999. Median age, maximum tumor base diameter and apex size were 55.5 years, 9.75 mm and 5 mm, respectively. Doses at the base of the tumor, including 1 mm of sclera, ranged from 157 to 487 Gy (median 284.5 Gy) and to the apex from 37 to 220 Gy (median 106 Gy). RESULTS: The crude eye preservation rate with conservative therapy alone was 78.5%. Five-year overall actuarial survival rate was 92.2% and eye conservation rate was 78%. Side effects were mostly an uncomplicated retinopathy in 39/102 patients (38.2%); macular degeneration or scarring led to poor central vision in 31/102 patients (30.3%) of cases. CONCLUSION: Our experience with cobalt-60 plaque brachytherapy achieved a satisfactory rate of local tumor control, despite the oversized base diameters of treated tumors.
Fun??es de pedotransferência para as curvas de reten??o de água e de resistência do solo à penetra??o em sistemas de manejo com plantas de cobertura permanente em citros
Fidalski, Jonez;Tormena, Cássio Antonio;
Ciência Rural , 2007, DOI: 10.1590/S0103-84782007000500015
Abstract: the soil quality in management systems can be assessed by simple indicators or pedrotransfer functions. this study was aimed at obtaining pedotransfer function (ptf's) such as the soil water retention curve (swrc) and the soil resistance to penetration curve (srpc), under interrows groundcover management systems of the 'pêra' orange. three treatments were evaluated: bahiagrass mowed paspalum notatum, perennial peanut arachis pintoi and spontaneous vegetation with herbicide, in a typic paleudult, northwestern paraná, brazil. in may 2003, two hundred and sixteen undisturbed soil samples were collected under beneath and between the whell tracks at 0.05-0.10m depth. soil bulk density (db), organic carbon (oc), water content and soil resistance to penetration (pr) were determined to fit the swrc and srpc in differents water potential. the db and oc contributed to fit the swrc and srpc under groundcover management systems in the interrows. ptf's were depended db, oc and treatment to fit swrc (r2=0.94) and srpc (r2=0.87). management on spontaneous vegetation using herbicide enhance soil compaction, decrease water retention and increase pr. perennial peanut decrease soil water retention and increase pr, and bahiagrass groundcover enhance the soil physical and hydarulic quality in the interrows. alternatively, ptf's required only to the determinations of the water content and db to the srpc and swrc.
Dinamica da calagem superficial em um latossolo vermelho distrófico
Fidalski, Jonez;Tormena, Cássio Antonio;
Revista Brasileira de Ciência do Solo , 2005, DOI: 10.1590/S0100-06832005000200009
Abstract: alterations in soil chemical properties after liming depend on the frequency of soil sampling and rainfall. this study evaluated such alterations in a typic haplorthox (rhodic ferralsol) with a sandy-loam superficial layer. the experiment had a completely randomized block design, with four dolomitic lime rates (0, 2.4, 4.8, and 7.2 t ha-1) and three replicates. the experiment was carried out in alto parana in northwestern parana state (southern brazil). lime was broadcast on the soil surface over brachiaria decumbens grass residues in-between rows of a young orange plantation. the experimental plots consisted of an area of 310 m2 with 15 orange plants each (3 rows and 5 plants per row). soil samples were collected in-between the rows of 3 central orange plants at depths of 0-0.05; 0.05-0.10; 0.10-0.20; 0.20-0.40; and 0.40-0.60 meter at 4, 12, 18, 24, 31, and 37 months after liming. this sampling times corresponded to alternated rainy and dry seasons of the region. the analysis of variance was performed based on a complete randomized block design in a split-split-plot scheme with repeated measures over time (years, rainfall season and lime rates), which were used in the regression analyses through orthogonal polynomial models. results showed that maximum alterations in the soil chemical properties were obtained with lime rates twice as high as those calculated to raise the soil base saturation to 70% at a depth of 0.20 m. soil sampling after the high rainfall period proved important to adjust the base saturation data in the 0 - 0.05 m layer. ca concentration only varied in the 0-0.10 m layer, while those of mg varied progressively from the first to the third year in the 0-0.60 m layer. mg concentrations were associated to the soil acidity correction (ph and h + al) and to the increment of the base saturation values in the 0.10-0.20 m layer, where it was found the lowest ca/mg ratio (1.06). the most pronounced response to surface liming was observed in the third year
Homogeneidade da qualidade física do solo nas entrelinhas de um pomar de laranjeira com sistemas de manejo da vegeta??o permanente
Fidalski, Jonez;Tormena, Cássio Antonio;
Revista Brasileira de Ciência do Solo , 2007, DOI: 10.1590/S0100-06832007000400004
Abstract: the soil physical quality is fundamental for the sustainability of citrus production. the objective of this study was to evaluate the homogeneity of soil physical quality in-between the rows of an orange orchard with groundcover management systems. the study was performed in an experimental field with groundcover systems in-between the rows of 'pêra orange' on 'rangpur' lime rootstock on a typic paleudult, in 1993, in alto paraná, in the northwestern region of the state of paraná, brazil. an experimental design of random blocks was used, with tree replications. the following groundcover treatments between the rows were studied: bahiagrass (paspalum notatum), perennial peanut (arachis pintoi), and the usual management in which weeds of spontaneous vegetation are herbicide-controlled. in may 2003, 216 undisturbed soil samples were collected from the mid 0-15 cm layer in two sampling positions: under and in-between tractor wheel tracks. soil samples were used to measure: water content at different matric potentials, soil bulk density, total porosity, and soil penetration resistance. pore size distribution, air capacity, and s index were also calculated. the inclusion of the soil air capacity and s index associated to pore size distribution broadened the understanding of the soil physical alterations caused by perennial groundcover management types in-between rows of orange orchard. the greater drained pore volume under the leguminous perennial peanut reduces water availability to plants, corroborated by higher air capacity and s index. the physical soil quality in-between rows of orange orchard covered with bahiagrass is more homogeneous that the usual management or perennial peanut.
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