Produção de progesterona pelas células luteínicas esteroidogênicas bovina cultivadas e co-cultivadas in vitro

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Desempenho e bem estar de bovinos Nelore na fase de recria mantidos em sistemas integrados de produção agropecuária

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Desenvolvimento de técnicas e avaliações de antimicrobianos visando a produção de etanol carburante

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Análise da viabilidade do uso de biogás gerado a partir de dejetos bovinos em microturbinas para fins de geração, cogeração e trigeração de energia

The use of digesters has become an important alternative for the proper disposal of organic agricultural wastes, serving as a solution to some environmental and health problems. Furthermore, the process of digestion provides commercially valuable by products such as biogas and bio fertilizer. The generation of biogas from agricultural waste, and its use in power generation systems has aroused great interest in rural areas because it enables supply in whole or in large part the energy demand of ownership by reducing production costs. The advent of technology has brought new forms of energy conversion of biogas, as the use of micro turbines specifies to be fuelled with biogas derived from the decomposition of organic matter in digesters, since it has a low level of methane in its composition, and high degree of impurities such as hydrogen sulphide, which are harmful to equipment and reduce the calorific value of biogas. The use of micro turbines behind other advantages like low emissions, great fuel flexibility and low maintenance. This paper presents an analysis of the feasibility of using biogas generated from cattle manure in micro turbines to generate electricity. Behind also an assessment of the energy potential that each animal has on various uses of biogas, and forms of energy recovery from the exhaust gases of the micro turbine. Also conducts an evaluation of the energy savings that the use of biogas aggregates properties.

Estudo genômico da produção de leite e seus constituintes em bovinos da raça Guzerá

Pós-graduação em Genética e Melhoramento Animal - FCAV

Diagnóstico de situação epidemiológica da Leishmaniose visceral canina em Rio Verde-GO

Pós-graduação em Medicina Veterinária - FCAV

Produção e emissão de gases de efeito estufa de bovinos alimentados com teores de concentrado

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Curva de lactação de cabras da raça Alpina e de seus mestiços boer, em sistema de produção em pasto, com e sem suplementação concentrada

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Análise Energética do processo experimental de produção de Biodiesel a partir do óleo de frango

There is a great global concern about the depletion and the high cost of fossil fuel reserves exploitation, more than ever, it is necessary to make a profound study and take advantage of alternative sources that can be used as energy efficiency with an appropriate pricing and low environmental impact. Brazil, which has highlighted using alternative energy sources as the use of ethanol and, in recent years, has been encouraging the expansion of its energy matrix in which the biodiesel will have a strategic importance within the agrobusiness area. Biodiesel is a fuel that can replace the diesel, which is a petroleum derivative. It is an ester, produced in the transesterification reaction of vegetable oils and animal greases, in an alcohol with an additional catalyst, are converted into fatty acids and result in esters with glycerol as sub products. The objective of this study was to estimate the final energy balance for the process biodiesel production from oil chicken waste. The energy balance estimation was quantified in calorific value according to the energy expenditure by calorimetric bomb method. The relationship between input and output of energy was around 0.97. In a first evaluation, the procedures adopted should be improved enough, so the process can become energetic and economically viable.

Análise matemática e estatística da produtividade de lavouras cafeeiras agroquímica e orgânica na região da alta paulista

Studies with organic systems have shown the feasibility and ecological and social sustainability of these agroecosystems, unlike the systems agrochemicals (conventional) production. Some studies have concluded that for the model agrochemical exists less interaction between the flow of internal energy, basically the crop receives all inputs to production with no increase in "energy quality" within the system, while in the organic model of production has increased interaction between different resources in the system. The current economic and ecological crisis, exposed no sustainability of the production pattern of industrialized agriculture developed in a way, showing the dependence of developed countries on imports of agricultural commodities produced in the third world, among there coffee. Given these facts, developed a survey to identify problems in the Alta Paulista region, west of São Paulo State, in relation to coffee production systems. Actually, the fundamental problem, according to the research, farmers in this region, is to choose a viable production system correctly (environmental, social and economic); agrochemical or organic. The objectives of this study were to analyze the yield of production systems and agro-chemical and organic coffee in the period from 2003 to 2007, in 30 producing properties, located in this region, in order to point the production system to produce the highest yield. According to the methodology of CONAB, data collected were recorded on spreadsheets to be used as variables in statistical analysis models and mathematics. We performed a descriptive analysis of productivity data and were used for statistical analysis tests for parametric and nonparametric analysis of variance. The mathematical analyses of the curves were prepared with Origin for Windows 6.0 software, which uses numerical methods to fit the data supplied to a function of variable parameters. Unlike conventional systems of production, the organic system showed greater viability of the production model. Furthermore, with the quantitative modeling proposal, it is possible to perform the evaluation of these types of investments, providing more security to the farmer at the time of decision.

Adubação orgânica e fertirrigação potássica em videira Syrah no Semiárido

Apesar da grande importância da adubação na qualidade das uvas, ainda existem poucos estudos sobre a fertirrigação em videira de vinho no Vale do Submédio São Francisco. Com o objetivo de avaliar a produção de uvas sob a influência de doses de potássio e de adubo orgânico, um experimento foi realizado na Embrapa Semiárido, em Petrolina-PE, com videiras (Vitis vinifera L.), ‘Syrah’, enxertadas sobre o porta-enxerto ‘Paulsen’ 1103 e cultivadas no espaçamento 3 x 1 m. As plantas foram irrigadas por um sistema de gotejamento, com um emissor por planta, com vazão de 2 L h¹. Os tratamentos foram constituídos de cinco doses de potássio (0, 20, 40, 80 e 160 kg ha¹) e duas doses de adubo orgânico (0 e 7,5 m³ qual o adubo orgânico constituiu as parcelas e as doses de potássio as subparcelas. Foram avaliados na colheita o número de cachos por planta, a produção total por planta, o peso médio dos cachos e o rendimento total das plantas. As diferentes doses de potássio aplicadas pelo sistema de irrigação e de adubo orgânico aplicados via solo não influenciaram significativamente as características avaliadas.

Produção de café sombreado

As concern about the environment and demand for special coffees, this review aimed to gather information about the effects of shading on the coffee crop, whereas its origin in the African's understory. Among the effects discussed are the increase in organic matter and improving of the soil fauna, nutrient cycling, decrease of soil erosion, environmental contamination, greenhouse gases, biodiversity conservation, light availability, temperature and wind mitigation, incidence of pests, plant diseases and weeds, production of the shade species and, finally, how all of these factors together have an effect on the phenology, yield and quality of coffee.

Eficiência energética da produção de café orgânico na região sul de Minas Gerais

In this study, organic coffee production systems energy efficiency was estimate. So, an itinerary technical was built since the deployment phase up to the organic coffee production. The inputs used (labor, machine hours, pesticides, fertilizers, etc.) converted into energy units, quantified the energy input, while the production of organic coffee beans benefited was constituted the energy output. Data collection was based on an intentional and non-probabilistic sampling. Nine farmers were interviewed whose main source of income was the coffee production and had keep records of the culture data. The balances were positive, with an energy yield of 626.465MJ.ha-1, compared to an energy expenditure of 112.998MJ.ha-1 during the crop cycle. It is concluded that organic coffee production is energy efficient.

Relação ideal dos aminoácidos essenciais para mantença, crescimento e produção de aves

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Parâmetros industriais para produção de Pleurotus ostreatus

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)