Frying oil is one of the major environmental problems in urban centers, causing blockage of sewer pipes and pollution of rivers. Producing biodiesel with frying oil is an alternative to reduce the environmental impacts generated in the undue discarding of the same. Because it has high calorific power, great availability, low emission of pollutants when burned, besides being renewable, which guarantees its uninterrupted supply. This study evaluated the use of diesel blends with biodiesel from frying oil, in proportions varied by 10% for each treatment, ranging from B0 with 0% to B100 with 100% biodiesel, at room temperature and after heating at an average temperature of 50.63°C. The blends were evaluated through measurements of density, viscosity, calorific power and fuel consumption, which were useful for determining the power supplied. Without preheating, there was a gradual increase in fuel consumption, when the percentage of biodiesel in blends increased. However, preheating resulted in a decrease in consumption. Thus, without preheating, there was a low decrease of the power supplied by biodiesel compared to diesel oil. With preheating, this reduction was significantly higher.

Flaxseed is the seed of the linen (Linum usitatissimum L.) and the most produced varieties are brown and golden flaxseed. The objective of this study was to investigate the influence of irrigation and nitrogen application in cultivation of the golden flax cultivation. The irrigation it was made by dripping, daily, except for days of rain occurrences, according to evapotranspiration. The treatments were separated by 0, 50, 100, 150, 200 and 250% of the daily irrigation, and the control value of 100% of the amount of evaporation by area. The seeds were planted on April 22, 2013. After flowering, data were analyzed as: Plant height, number of branches and siliques and the fresh and dry mass of silica and twigs on August 8, 2013. The crop occurred on October 10, 2013 and they were analyzed: amount of silica, number of seeds, total weight of seeds per plant, weight of 100 seeds, the production per meter and the proportion by hectare. Urea application resulted in an improvement in the production of two varieties. The combined irrigation also increases the production; however, in quantities exceeding 150% of irrigation, there was a decrease.

RESUMOA rúcula (Eruca sativa L.) é uma hortaliça essencial na dieta alimentar de grande parte da população, destacando-se pela sua composição nutricional com altos teores de potássio, enxofre, ferro e de vitaminas A e C. O objetivo deste trabalho é verificar a influência do extrato aquoso das folhas de pinhão manso no cultivo da rúcula. Utilizaram-se concentrações de extrato de pinhão manso para efetuar os tratamentos, sendo 0% (testemunha), 5, 10, 20, 40, 80 e 100%, considerando como extrato puro 200g de folhas verdes do pinhão manso em um litro de água destilada. As sementes foram semeadas em bandejas especificas para produção de mudas de hortaliças, utilizou-se sistema de aspersão manual.Com o aumento da concentração do extrato aquoso das folhas de pinhão manso houve tendência decrescente no número de folhas, altura da plântula, tamanho da raiz, diâmetro do caule e massa fresca, comprovando o efeito alelopático do extrato de folhas de pinhão manso sobre o cultivo da rúcula.Palavras chave: Jatropha curcas L., Eruca sativa L., alelopatia.ABSTRACT Arugula (Eruca sativa L.) is an essential vegetable in the diet of a large part of the population, especially for their nutritional composition with high content of potassium, sulfur, iron and vitamins A and C. This work on the influence of the aqueous extract of leaves of jatropha cultivation of arugula. We used concentrations of extract of Jatropha to make the treatments and 0% (control), 5, 10, 20, 40, 80 and 100%, considering how pure extract 200g green leaves of Jatropha in one liter of water distilled. Seeds were sown in specific trays for seedlings of vegetables, we used a manual sprinkler system. With increasing concentration of the aqueous extract of leaves of Jatropha curcas showed a decreasing trend in the number of leaves,