01.1 - Graduação (Sede)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/2
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Resultados da Pesquisa
Item Estudo do poder catalítico de óxidos a base de resíduos de carapaças de sururu na síntese de biodiesel etílico e metílico a partir do óleo de fritura(2021-07-16) Silva, Jeane Rego da; Silva, Claudia Cristina Cardoso da; http://lattes.cnpq.br/9810071055429520; http://lattes.cnpq.br/5899758335174071The search for alternative solutions to oil consumption has been growing, due to the alarming acceleration of global warming. As an alternative, the use of green chemistry appears in order to revert this aggressive process to the environment, and biofuels appear as allies. Among biofuels, biodiesel is shown as an alternative in reducing greenhouse gases. Its production consists of the transesterification reaction of vegetable oil or animal fat with a short-chain alcohol, in the presence of a catalyst. On an industrial scale in Brazil, biodiesel is synthesized from soybean oil and methanol, under sodium methoxide catalysis. These 3 parameters do not favor the renewable character of biodiesel since; i) soy oil competes with a food; ii) methanol has a fossil origin which becomes meaningless when producing a renewable fuel; and iii) sodium methoxide is a homogeneous, non-reusable catalyst and needs to be removed with an aqueous solution in order to purify the biodiesel, generating a huge volume of effluents which, ultimately, also diminishes the environmental appeal of biodiesel as a biofuel. With all of this in mind, this work consisted of the study of the catalytic power of calcium oxide generated from the residues of shells from sururu, in order to produce biodiesel under the analysis of several parameters; i) ethanol and methanol as reagent alcohol; ii) neutral soybean oil and frying oil with 2 different acidity indices as starting oil; and iii) different reaction times in order to determine the kinetic behavior of this catalyst under each of these different parameters. Homogeneous catalysis was also performed in order to observe its behavior under extreme conditions and compare this behavior with heterogeneous catalysis. From studies of FTIR spectra, we verified the high catalytic efficiency of our oxide in the production of methyl biodiesel, both in neutral oil and in different acidic frying oils. This reaction success was attributed to the conversion of triglyceride to methyl esters above 95%. For the case of neutral oil, this efficiency was reached after 1 h of reaction and in the other cases after 3 to 4 h of reaction. The same success when observing the catalytic efficiency of converting soybean oil into ethylic biodiesel was also verified through the FTIR spectra, but this time without a calibration curve, which made a quantitative analysis impossible.Item Histopatologia de fígado de codornas alimentadas com óleo de Moringa oleifera Lam em substituição ao óleo de soja(2019-07-19) Silva, Webert Aurino da; Nascimento, Júlio Cézar dos Santos; http://lattes.cnpq.br/4343017315156292; http://lattes.cnpq.br/7409325762363597The search for the threat of growth promoters for poultry feed, the search for substitute products that enable them to act on current antimicrobials, maintaining intestinal strength and the health of other organs, provide good nutrient absorption efficiency and good production rates. Probiotics, prebiotics, symbiotic and biological, and the prominent and close, are the perspective of alternatives to their positive action on animal health. Moringa is a fast growing plant with adaptation in tropical climates, it has several uses and it is in state of animal nutrition, having appeared some studies on the importance of vegetal nutrition, limiting the amino acids for the birds. Moringa oil also has therapeutic components, which are found largely under the health and performance of animals. The present study was about the effect of Moringa oleifera Lam oil on the liver of Japanese quails. A total of 120 birds with 18 weeks of age, distributed in a completely randomized design, housed in galvanized wire cages with dimensions of 33 x 30 x 18 cm (depth x width x height), equipped with drinking fountains and glass fountains were arranged on three floors, mounted on a ladder. The experiment was conducted at the Bird Research Laboratory (LAPAVE), located in the Animal Science Department of the Federal Rural University of Pernambuco. The experiment had five treatments, of 0; 0.5; 1; 1.5; 2.0% Moringa oleifera oil in the removal of soybean oil. At 36 weeks old, quail were sacrificed and the liver collected 4 birds from each treatment, ie 5x4 = 20 other organs, in order to look for signs of toxicity or improvement. The collected liver was preserved in 10% formalin solution, later these samples were taken to the animal histology laboratory where the histological slides were prepared. After the preparation of the laminae, a microscope was read where the lesions were described. We can observe that higher levels of soybean oil contributed to the presence of fatty liver, and that from 0.5% inclusion of Moringa oil we observed improvements in hepatic tissue, this effect is justified due to the presence of tocopherols, flavonoids and antioxidants present in the oil. With the present work we conclude that from the inclusion of 0.5% Moringa oleifera oil in Japanese laying quails feeding, it had an antioxidant effect against lipid peroxidation, increased ability to regulate membrane permeability of hepatocytes increasing its defense against the aggression of substances harmful to the organ that could cause greasy liver, thus also being able to highlight antinflammatory action with the increase of the activity of the cells of Kpuffer.