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Search Results: 1 - 10 of 78294 matches for " Carlos Alexandre Costa;Costa "
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Composi??o físico-química e potencial para ensilagem do sorgo-de-guiné gigante em seis épocas de semeadura
Mateus, Gustavo Pavan;Crusciol, Carlos Alexandre Costa;Costa, Ciniro;
Pesquisa Agropecuária Brasileira , 2005, DOI: 10.1590/S0100-204X2005000900014
Abstract: the lack of alternative crops for fall-winter cultivation is a drawback in the utilization of agricultural production systems, especialy in regions with dry winters. the purpose of this study was to evaluate the potential of giant guinea sorghum (sorghum bicolor subsp. bicolor guinea race) for forage production, ensiling and plant chemical composition, in different sowing dates. the experimental design was a randomized block, with four replications, and six sowing dates. although sowing was late, giant guinea sorghum showed anticipation in development stages due to sensibility to photoperiod; its dry matter production was low, nevertheless the species presented a better quality of forage mass. due to the considerable capacity of dry matter production and ensiling potential, this species is a good option.
Job and housework during radiotherapy: Comparisons between leaving out activities and disease treatment  [PDF]
Cristiane Helena Gallasch, Neusa Maria Costa Alexandre, Sergio Carlos Barros Esteves
Health (Health) , 2013, DOI: 10.4236/health.2013.56142

Background: Researches about work limitations related to cancer treatment and survival are recent. This study describes the characteristics of patients who keep their work and house work activities during radiotherapy, and comparison between some disease data and leaving out those activities. Methods: Data were collected from medical records of patients admitted in a Brazilian Radiotherapy Private Health Service. Descriptive statistical analysis was performed, as hypotheses texts, Chi-square and Fisher’s exact test. Results: Data of 111 individuals were presented; being 65.77% of workers of paid activities and 34.34% of careers of home. Between employees, 50.7% kept their job activities, and 92.1% between house workers. The association between absence from work activities and tumor type (primary or metastasis) and between absence and KPS (p < 0.05) were observed. Discussion: It is observed that breast, brain and lung tumors significantly affect employees’ performance, causing the withdrawal of workers from their activities. Data from the literature review clearly demonstrated the importance of work activities in social support of the worker, but his overall performance may be impaired. Implications for cancer survivors: The study indicates the need for assessment of the individual, work or activity environment and required as well as the continuity research aiming at the development and validation of evaluation tools such as questionnaires or scales.

Produtividade de milho, espa?amento e modalidade de consorcia??o com Brachiaria brizantha em sistema plantio direto
Borghi, Emerson;Crusciol, Carlos Alexandre Costa;
Pesquisa Agropecuária Brasileira , 2007, DOI: 10.1590/S0100-204X2007000200004
Abstract: the objective of this research was to evaluate the effects on corn yield of different modes of corn intercropping with brachiaria brizantha cv. marandu. the experiment was carried out in field conditions, in 2002/2003 and 2003/2004, at fazenda experimental lageado (unesp), in botucatu, sp, brazil. the experimental design was the randomized complete block, as a factorial 2x4, with four replications. the treatments were two row spacings of corn (0.45 and 0.90 m) and four intercropping modalities: single corn; corn intercropped with b. brizantha in the row of sowing; corn intercropped with b. brizantha in space between two rows; and corn intercropped simultaneously with b. brizantha in the row and in the inter-row. the consortium modalities and the spacing used did not damage nitrogen absorption, neither for the corn nor the forage. corn grains productivity in 0.45 m row spacing was lower with the row and inter-row brachiaria consortium. depending on agricultural year, grain yield is greater in the reduced row spacing, when intercropping with brachiaria, independently of the modality.
Cover crops and herbicide timing management on soybean yield under no-tillage system
Nascente, Adriano Stephan;Crusciol, Carlos Alexandre Costa;
Pesquisa Agropecuária Brasileira , 2012, DOI: 10.1590/S0100-204X2012000200006
Abstract: the objective of this work was to evaluate the effect of cover crops and timing of pre-emergence herbicide applications on soybean yield under no-tillage system. the experiment consisted of four cover crops (panicum maximum, urochloa ruziziensis, u. brizantha, and pearl millet) and fallow, in addition to four herbicide timings (30, 20, 10, and 0 days before soybean sowing), under no-tillage system (nts), and of two control treatments under conventional tillage system (cts). the experimental design was a completely randomized block, in a split-plot arrangement, with three replicates. soybean under fallow, p. maximum, u. ruziziensis, u. brizantha, and pearl millet in the nts and soybean under u. brizantha in the cts did not differ significantly regarding yield. soybean under fallow in the cts significantly reduced yield when compared to the other treatments. the amount of straw on soil surface did not significantly affect soybean yield. chemical management of p. maximum and u. brizantha near the soybean sowing date causes significant damage in soybean yield. however, herbicide timing in fallow, u. ruziziensis, and pearl millet does not affect soybean yield.
Intervalo hídrico ótimo e compacta??o do solo com cultivo consorciado de milho e braquiária
Calonego, Juliano Carlos;Borghi, Emerson;Crusciol, Carlos Alexandre Costa;
Revista Brasileira de Ciência do Solo , 2011, DOI: 10.1590/S0100-06832011000600033
Abstract: intercropping of a forage and main grain crop ensures forage production in the autumn-winter, and straw for mulching in the no-tillage system. the contribution of dry root matter in the soil profile allows the improvement of soil structural quality. the objective of this research was to evaluate changes in soil physical and physico-hydric properties with the cultivation of maize grown alone and intercropped with brachiaria brizantha. the study was carried out on the experimental farm lageado (unesp, botucatu-sp) in the growing seasons 2002/2003 and 2003/2004. undisturbed soil was sampled from the layers 0-20 and 20-40 cm by volumetric rings in plots growing maize and left fallow between harvest and in plots intercropped with maize and b. brizantha in the row, where the grass was maintained for grazing after maize harvest. the least limiting water range (llwr) of these samples was evaluated, based on curves of penetration resistance and water retention in soil samples with different bulk densities. maize grown alone is sufficient to improve the physical and structural characteristics of the soil in the 0-20 cm layer. brachiaria intercropped with maize for two years improves the soil physical and structural properties in the layer 20-40 cm as well, reducing penetration resistance and increasing bulk density.
Data Evaluation and Visibility in Single Beam Scanner of Gamma Ray Tomography  [PDF]
Carlos Costa Dantas, Alex Elton Moura, Tiago Leite Rolim, Silvio de Barros Melo, Valdemir Alexandre dos Santos, Emerson Alexandre de Oliveira Lima
World Journal of Nuclear Science and Technology (WJNST) , 2013, DOI: 10.4236/wjnst.2013.31004

In this paper, data analysis and modeling of gamma ray tomography taken into account spatial resolution and source of errors and the attenuation coefficient measurement in row data from tomography process are presented. The results showed that this method is simple, effective and should be prior to any data treatment for opaque vessel reactor and by reconstruction algorithm in process imaging.

Criptosporidiose em crian?as de 1 a 2 anos de idade, com diarréia aguda em Belém, Pará, Brasil
Loureiro, Edvaldo Carlos Brito;Linhares, Alexandre da Costa;Mata, Leonardo;
Memórias do Instituto Oswaldo Cruz , 1989, DOI: 10.1590/S0074-02761989000100021
Abstract: two hundred and one samples obtained from 61 children were examined for cryptosporidium infection during a period of 12 months. one hundred fifteen specimens were collected during diarrhoea episodes and the remaining 86 obtained out of diarrhoea period, as controls. all samples were examined by a modified ziehl-neelsen staining method. cryptosporidium was detected in 6 (5.2%) of 115 samples from diarrhoeic children. all non-diarrhoeic control patients were negative for cryptosporidum. the present study suggests that cryptosporidium is an agent of self-limited diarrhoea among immunocompetent children from belém, pará.
Produtividade de gr?os e exporta??o de nutrientes de cultivares de arroz irrigadas por aspers?o em conseqüência da época de semeadura
Crusciol, Carlos Alexandre Costa;Soratto, Rogério Peres;Arf, Orivaldo;
Bragantia , 2007, DOI: 10.1590/S0006-87052007000200008
Abstract: the use of appropriate cultivars and sowing date can provide higher grain yield of upland rice, in sprinkler-irrigated system. however, data about nutrient exportation by sprinkler-irrigated rice grains are scarce. the objective of this work was to evaluate the effect of sowing dates on the grain yield and nutrients exportation by grains of upland rice cultivars (iac 201, iac 202, carajás, cna 7800 e cna 7801) under sprinkler irrigation. experiments were carried out in 1995/96 and 1996/97 growing seasons, on a typic haplustox, in selvíria, state of mato grosso do sul, brazil. the sowings were carried out at the beginning of the second middle of september, october, november, december, january, and february, in each growing season. a randomized complete block design, in a split plot scheme, with four replications was used. sowing dates affected grain yield and nutrient exportation on it. november sowing reached highest nutrient exportation, because provided highest grain yield. in early sowing (september), the cultivar carajás presented highest grain yield and nutrient exportation; however, during october to december sowings the cultivar cna 7801 presented the best results. it is possible sowing in february using the cultivars iac 201 and carajás with grain yield higher than 3900 kg ha-1 under sprinkler irrigation system.
Produ??o de fitomassa e acúmulo de nutrientes pela aveia-preta em fun??o da aplica??o de calcário e gesso em superfície na implanta??o do sistema plantio direto
Soratto, Rogério Peres;Crusciol, Carlos Alexandre Costa;
Ciência Rural , 2008, DOI: 10.1590/S0103-84782008000400004
Abstract: in order to evaluate the influence of lime and phosphogypsum surface application, during establishment of no-tillage system, on black oat dry matter yield and nutrient cycling, an experiment was carried out during 2003 and 2004, on a haplorthox. a randomized complete block design, in split-plot arrangement, and four replications was used. the plots consisted of four dolomitic limestone levels (0; 1,100; 2,700; and 4,300kg ha-1). the subplots were represented by presence or absence of phosphogypsum application (2,100kg ha-1). the treatments were applied in october 2002. surface application of lime did not affect black oat dry matter yield in no-tillage system, in both presence and absence of phosphogypsum application. phosphogypsum increased ca and s-so42- contents in soil and s uptake by black oat crop. in year with less water availability, the surface application of phosphogypsum promoted increasing on dry matter yield, n and ca contents, and n, ca, fe, and zn accumulation by black oat crop.
Reguladores vegetais no desenvolvimento e produtividade da cana-de-a?úcar
Leite, Glauber Henrique Pereira;Crusciol, Carlos Alexandre Costa;
Pesquisa Agropecuária Brasileira , 2008, DOI: 10.1590/S0100-204X2008000800007
Abstract: the objective of this work was to evaluate the development and productivity of sugarcane, due to plant regulators application at the cropping season beginning. the treatments consisted of three plant growth inhibitors - sulfometuron methyl, glyphosate, and compounds of organic carboxilic radicals + glyphosate - and natural ripening as control, in a randomized block design with five replicates. the ripeners hold up the growth process of plant height, without affecting the number and diameter of stems at harvest, however they influence, in different intensities and ways, the flowering and pith process. glyphosate provide the largest index of bud sprouting and damage of regrowth of the ratoon cane. the ripeners induce increase in sugar reducer total contents, contributing for the improvement in technological quality of sugarcane.
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