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Search Results: 1 - 10 of 475739 matches for " Douglas de Castilho;Sá "
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Uso de etil-trinexapac em cultivares de arroz de terras altas
Arf, Orivaldo;Nascimento, Vagner do;Rodrigues, Ricardo Ant?nio Ferreira;Alvarez, Rita de Cássia Félix;Gitti, Douglas de Castilho;Sá, Marco Eustáquio de;
Pesquisa Agropecuária Tropical , 2012, DOI: 10.1590/S1983-40632012000200008
Abstract: the lodging of some rice cultivars, at harvest time, can cause significant losses in grain yield. the use of plant regulators is one of the alternatives to reduce lodging, however, information on that subject are still scarce. this study aimed to evaluate the use of ethyl-trinexapac doses (0 g ha-1, 50 g ha-1, 100 g ha-1, 150 g ha-1, and 200 g ha-1), at the floral differentiation stage, in rice cultivars with different types of plants (caiapó - traditional; brs primavera and brs soberana - intermediate; and iac 202 - modern), in order to evaluate grain development and yield. the experiment was carried out in selvíria, mato grosso do sul state, brazil, during the 2007/2008 growing season. it was observed that the application of 50 g ha-1, 100 g ha-1, and 150 g ha-1 of ethyl-trinexapac, during the floral differentiation stage of the caiapó, brs soberana, and brs primavera cultivars, respectively, decreased plants height and eliminated lodging; it was not necessary to use growth regulator for the iac 202 cultivar, due to its lack of lodging; the application of 50 g ha-1 and 150 g ha-1 of ethyl-trinexapac, during the floral differentiation stage, improved grain yield for the caiapó and brs primavera cultivars, respectively, and the 100 g ha-1 dose interfered little in the brs soberana cultivar.
A fraternidade em quest?o: um olhar psicossociológico sobre o cuidado e a "humaniza??o" das práticas de saúde
Sá, Marilene de Castilho;
Interface - Comunica??o, Saúde, Educa??o , 2009, DOI: 10.1590/S1414-32832009000500016
Abstract: this paper aims to discuss some challenges for healthcare production, considering the intersubjective and unconscious processes that condition it. the methodological approach for the analysis is based on theoretical categories from the french school of psychosociology, from psychoanalytical theory on intersubjective/group processes and from work psychodynamics. the sociability patterns and the dominant means of subjectivation within society impose serious limits on healthcare work. these are additional to the limits of a material, technological or organization nature that are more easily recognized. the intersubjective and unconscious dimension of healthcare work produces effects on the quality of care. the specificity of healthcare work and its demands for psychological work are discussed, examining its consequences for the quality of care. some possibilities for analyzing and dealing with the intersubjective and unconscious dimension of healthcare work are presented, and these may contribute towards a new way of producing healthcare management.
Subjetividade e projetos coletivos: mal-estar e governabilidade nas organiza??es de saúde
Sá,Marilene de Castilho;
Ciência & Saúde Coletiva , 2001, DOI: 10.1590/S1413-81232001000100013
Abstract: this paper explores some topics regarding the relations among subjectivity, group processes and planning and management processes within health organizations. these issues turn out to be important when we consider the obstacles involved in the organizational change processes, as well as the limitations of management theoretical and methodological tools in subsidizing these processes. health sector in brazil has been, simultaneously and paradoxically, a space for innovations in health assistance and public management, as well as the privileged locus for the social contradictions and for the intense exclusion, segregation and undervaluation of life in our society. in this context, we are particularly interested in examine the possibilities of developing collective projects within health organizations, and ways to approach their cultural, subjective and unconscious dimensions. the consideration of these dimensions is an indispensable condition to learn about the limits (and the possibilities) of governability of health organizations.
Subjetividade e projetos coletivos: mal-estar e governabilidade nas organiza es de saúde
Sá Marilene de Castilho
Ciência & Saúde Coletiva , 2001,
Abstract: O presente texto procura explorar algumas quest es derivadas das rela es entre subjetividade, processos intersubjetivos/grupais e processos de planejamento e gest o nas organiza es de saúde. Essa problemática tem-se destacado, fundamentalmente, a partir da constata o dos obstáculos à implementa o dos processos de mudan a nas organiza es, bem como dos limites dos instrumentais teórico-metodológicos disponíveis em planejamento e gest o para favorecer tais processos. O setor saúde no Brasil tem sido, simultanea e paradoxalmente, espa o de experimenta o de propostas inovadoras nos campos da assistência e da gest o pública, bem como locus privilegiado de manifesta o das contradi es sociais e do intenso processo de exclus o, segrega o e desvaloriza o da vida que tem marcado nossa sociedade. Neste contexto, o que nos interessa essencialmente examinar é até que ponto é viável a constru o de projetos coletivos, no ambito das organiza es de saúde, e como é possível abordar suas dimens es cultural, subjetiva e inconsciente - condi o, nos parece, indispensável para se aprender sobre os limites (e possibilidades) de governabilidade dessas organiza es.
O processo de trabalho em saúde e a produ??o do cuidado em uma unidade de saúde da família: limites ao acolhimento e reflexos no servi?o de emergência
Barros,Delba Machado; Sá,Marilene de Castilho;
Ciência & Saúde Coletiva , 2010, DOI: 10.1590/S1413-81232010000500022
Abstract: this study examines the work process of a family health unity (usf) in a small municipality, inland the state of rio de janeiro. we would like to start with the question of what is causing the population registered in a family health program to look for the emergency service (se) of a general hospital. semi-structured individual interviews were conducted with doctors who worked on duty and users in the emergency service and group interviews with users of a family health unit and its staff. in addition, information was also collected by participant observation. the theoretical fields of health management and psycho-sociology were the grounds of this research. it was concluded that the "modus operandi" of the usf, the geographical and organizational accessibility, and the technological apparatus of the se ended up leading the population to seek the general hospital emergency service of the municipality mentioned in this study in acute situations of suffering and distress.
Uso de reguladores de crescimento no desenvolvimento e produ??o de crotalária
Kappes, Claudinei;Arf, Orivaldo;Arf, Marcelo Valentini;Gitti, Douglas de Castilho;Alcalde, Andrews Molnar;
Pesquisa Agropecuária Tropical , 2011, DOI: 10.5216/pat.v41i4.10768
Abstract: studies have pointed out the viability of the application of growth regulators in agriculture, however, information referring their use in crotalaria juncea are still rare. thus, this study aimed to evaluate the influence of the foliar application of growth regulators (mepiquat chloride, etil-trinexapac, and paclobutrazol), at different doses (0 g ha-1, 75 g ha-1, 150 g ha-1, 225 g ha-1, and 300 g ha-1), on the vegetative and reproductive development of crotalaria juncea l. the experiment was carried out in 2010, in selvíria, mato grosso do sul state, brazil. the experimental design was randomized blocks, in a 3x5 (regulators x doses) factorial scheme, with four replications. agronomic traits, yield, and the f test results were evaluated, being the regulators averages compared by the tukey test (p < 0.05) and doses compared by regression analysis. growth regulators influenced the vegetative and reproductive development of crotalaria juncea. the increase of etil-trinexapac and paclobutrazol doses reduced linearly the plant height, while the use of mepiquat chloride and paclobutrazol increased the number of pods and seeds per plant and reduced yield. the final plants population, number of seeds per pod, and weight of one thousand seeds were not affected by the growth regulators.
Influence of nitrogen fertilization and green manure on the economic feasibility of no-tilled wheat in the Cerrado
Gitti, Douglas de Castilho;Arf, Orivaldo;Melero, Mariana;Rodrigues, Ricardo Antonio Ferreira;Tarsitano, Maria Aparecida Anselmo;
Revista Ceres , 2012, DOI: 10.1590/S0034-737X2012000200014
Abstract: the search for higher profitability in wheat crop with cost reduction technologies that may promote sustainability is an important matter in brazilian agriculture. this study evaluated the profitability of no-tilled wheat, reducing nitrogen topdressing doses with the cultivation of green manure before the wheat crop. the experiment was carried out in selvíria (ms), brazil, in 2009/10. the experiment was arranged in a randomized block design with 36 treatments in splitplots and four replicates. the plots were formed by six types of green manure: cajanus cajan l. brs mandarin, crotalaria juncea l., pennisetum americanum l. brs 1501, fallow area and mixed cropping of pennisetum americanum l. + cajanus cajan l. and pennisetum americanum l. + crotalaria which provided straw for no-tilled wheat in the winter, following the rice crop in the summer. the subplots were formed by six levels of topdressing nitrogen (0, 25, 50, 75, 100 and 125 kg n ha-1) using urea as a nitrogen source. the wheat grown after green manure in the previous winter crop, with no nitrogen topdressing and a rate of 25 kg ha-1 n, had more frequently production costs above the gross income. wheat production cost after the mixed cropping pennisetum americanum l. + cajanus cajan l. and pennisetum americanum l. + crotalaria juncea l. from the previous winter crop, combined with nitrogen rates of 50 and 75 kg n ha-1, provided better profitability compared with the other green manures evaluated.
Flávio Hiroshi Kaneko,Orivaldo Arf,Douglas de Castilho Gitti,Maria Aparecida Anselmo Tarsitano
Pesquisa Agropecuária Tropical , 2009, DOI: 10.5216/pat.v40i1.6888
Abstract: Agronomic practices that help farmers to raise yield and reduce costs must be studied to ensure agricultural sustainability. Thus, the objective of this study was to analyze economically the effect of soil management and nitrogen fertilization in maize crops. Treatments consisted of a combination of 3 soil management techniques (plow harrows + floating harrows, chisel + floating harrows, and no-tillage), 5 periods of nitrogen fertilization (control - 0 kg ha-1 N; 120 kg ha-1 after sowing (S); 120 kg ha-1 in the V6 stage; 30 kg ha-1 (S) + 90 kg ha-1 in V6; 30 kg ha-1 (S) + 45 kg ha-1 in V4 + 45 kg ha-1 in V8. The total operating cost (TOC), gross revenue (GR), operating profit (OP), profitability index (PI), break-even yield, and break-even price were estimated. It was concluded that the no-tillage system, after 11 years of management, associated with nitrogen fertilization promotes positive PI and OP, being useful to farmers. KEY-WORDS: Zea mays; production cost; no-tillage; conventional tillage.
Carlos Alessandro Chioderoli,Carlos Eduardo Angeli Furlani,Rouverson Pereira da Silva,Douglas de castilho Gitti
Pesquisa Agropecuária Tropical , 2010, DOI: 10.5216/pat.v40i4.7647
Abstract: The performance of machines and agricultural implements are of fundamental importance, especially when subjected to different types of soil tillage, and have to adapt to these conditions, in order to promote good operational performance. The objective of this study was to analyze the operational performance of a Marchesan Supreme Cop grain drill, equipped with four rows, spaced 0.90 m, according to three types of tillage: conventional tillage (plowing and two harrowing series), reduced tillage (scarification with a roller), and no-tillage, in areas previously seeded with maize (Zea mays L.), at two spacing measures (0.90 m and 0.45 m). The results indicate that the demand for power, tensile stress, and motor rotation, in the sowing operation, were not influenced by tillage and maize crop. The tractor wheel slip showed different results, being lower in no-tillage and higher in conventional and reduced tillage. KEY-WORS: Zea mays L.; sowing; operational capacity; wheel slip; agricultural machinery. O desempenho de máquinas e implementos agrícolas é de fundamental importancia, principalmente quando est o sujeit
Simula o e análise de um sistema industrial de colunas de destila o de etanol = Simulation and analysis of an industrial system of columns for ethanol distillation
Maria Fatima Marquini,Douglas Castilho Mariani,Antonio José de Almeida Meirelles,Onélia Aparecida Andreo dos Santos
Acta Scientiarum : Technology , 2007,
Abstract: Um sistema industrial de colunas de destila o típico é composto por três colunas distintas e voltado à produ o de álcool etílico hidratado. Com o intuito de alcan ar uma melhor compreens o sobre o comportamento desse sistema, foram instalados diversos pontos de amostragem de temperatura, concentra o alcoólica, press o e vaz o ao longo da instala o. Essas medidas viabilizaram a avalia o da qualidade das previs es de um simulador de processos usual. A partir das simula es foi possível constatar que, dentre as equa es disponíveis no simulador para estimar os coeficientes de atividade, a equa o NRTL foi a que conduziu aos melhores resultados com os dados experimentais, com desvios em torno de 2 e 2,5% em rela o às temperaturas e concentra es alcoólicas, respectivamente, as quais foram medidas em várias bandejas das colunas de destila o quecomp e o sistema. A typical industrial system of distillation columns involves threecolumns for hydrated ethyl alcohol production. In order to obtain a better understanding of the behavior of this system, several sample points were installed along the distillation unit for measuring temperature, pressure and flow values, and also for collecting liquid phase samples in order to determine the corresponding alcoholic concentrations. The distillation unit involves three rectification and stripping columns. The experimental measurements made possible the evaluation of the quality of the process simulation results. The simulation results indicate that, among the equations available in process simulation for calculating the activity coefficients, the NRTL model was the one that leads to the best agreement with theexperimental data, with deviations around 2 and 2.5% in relation to temperatures and alcohol concentrations respectively, whose values were measured in several trays of the distillation unit.
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