Navegando por Assunto "Murumuru"

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Acesso aberto (Open Access)
Consumo, digestibilidade, balanço de nitrogênio e composição bromatológica da torta de murumuru (Astrocaryum murumuru var. murumuru Mart.), na alimentação de ruminantes
(Universidade Federal do Pará, 2012-02-10) MENEZES, Bruno Peres de; SILVA, André Guimarães Maciel e; http://lattes.cnpq.br/8940750096354420; http://lattes.cnpq.br/9647377426235964; ANDRADE, Stefano Juliano Tavares de; LOURENÇO JÚNIOR, José de Brito; http://lattes.cnpq.br/2919433679918544
We assessed the pie murumuru (Astrocaryum murumuru var. murumuru, Mart.), from processing kernels after oil extraction by the cosmetic industry, the effects of the substitution levels of 0%, 10%, 20%, 40% and 60% in the basic diet of Mombaça grass (Panicum maximum cv. Mombaça) on intake and digestibility of dry matter (CDDM), organic matter (CDOM), ether extract (CDEE), crude protein (CDCP), fiber neutral detergent (CDFND), fiber acid detergent (CDFDA), cellulose (CDCEL) and hemicellulose (CDHCEL) and nitrogen balance. Metabolism trial was conducted with 20 castrated sheep, live weight of 24 kg, distributed in five treatments and four replications in a completely randomized design. Adaptation period was 21 days with five days of data collection of diet and refusals, feces and urine. The CMS, CMO, EEC, CCP, FND, CFDA, CHCEL, CLIG showed a quadratic effect as a function of the substitution with pie in the diet. The CDDM, and CDCP CDMO showed no significant effects. The CDEE with optimal replacement level 56,64% and 88,62% maximum digestibility, CDFND with optimal replacement level 42,45% and 68,25% maximum digestibility, CDFDA with optimal replacement level of 31,63% and maximum digestibility of 66,80%, CDCEL with optimal replacement level 27,45% and 72,21% maximum digestibility showed a quadratic effect due to substitution murumuru pie. Nitrogen balance had no significant effect of inclusion in the grass of 0% to 60% of pie. It is concluded that the pie murumuru (Astrocaryum murumuru var.Murumuru Mart.), Has as its main limitation is the low dietary intake and digestibility, in addition to impossibility of its use as a concentrate exclusively on the diet of sheep showing up as an alternative food for up to 20% replacement in diets.
Acesso aberto (Open Access)
Estudo da potencialidade da cinza da casca do murumuru, um resíduo agro industrial amazônico como filler ao concreto estrutural
(Universidade Federal do Pará, 2022-11-17) SOUZA, Milleno Ramos de; CORDEIRO, Luciana de Nazaré Pinheiro; http://lattes.cnpq.br/9126233381230999; https://orcid.org/0000-0001-7931-4042; TEIXEIRA, Marcelo Rassy; http://lattes.cnpq.br/8912916360456192
The use of agro-industrial waste in the partial replacement of cement in concrete has been the subject of research that analyzes the possible improvements in mechanical and physical properties and durability of the concrete, in addition to providing the use of mineral additions of natural origin or partial replacement in relation to the constituent materials of the composite, waste that would have inappropriate disposal, such as open-air landfills and burning. With this scenario, the study aims to research the use of murumuru husk ash (MHA), an agro-industrial waste generated specifically in the Amazon region as partial replacement of cement in structural concrete and evaluate the physical, chemical and mineralogical characteristics of the ash to act as filler in concrete, and its properties in the fresh and hardened state in concrete. With this purpose, the MHA underwent the physical-mechanical characterization tests such as specific mass, pozzolanic activity with Portland cement, pozzolanic activity with lime and BET test, also performing the mineralogical and chemical analysis of the ash. For concreting, a mix 1:1.6:2.4 (by mass) with water/cement ratio of 0.43 was considered, with replacement levels of 0%, 6%, 9% and 13% of the cement mass by MHA. After the dosage, the tests were performed on the concrete in its fresh and hardened state: slump test, specific mass, compressive strength (28 days), tensile strength in diametrical compression, water absorption by capillarities, specific mass in the hardened state, modulus of elasticity and morphological evaluation, through the Scanning Electron Microscope (SEM). Checking first the properties of concrete in the fresh state, it is evaluated that the insertion of the waste decreased the consistency and decreases the specific mass, except the concrete for the content of 6% that there was a 10% increase in the specific mass in relation to the concrete reference. Regarding the properties in the hardened state, the replacement by CCM showed an increase specifically in compressive and tensile strength in the 6% content at 28 days around 1% and 9% respectively, occurring a decrease in the contents of 9% and 13%. The results showed that there is a technical feasibility with partial replacement of 6% of MHA in cement, using plasticizer additive to improve workability
Acesso aberto (Open Access)
Obtenção e caracterização de carreadores lipídicos nanoestruturados a partir de gordura vegetal de murumuru (Astrocaryum murumuru Mart.)
(Universidade Federal do Pará, 2016-05-16) SENA, Luann Wendel Pereira de; SILVA JÚNIOR, José Otávio Carréra; http://lattes.cnpq.br/4437885351749994
The nanostructured lipid carrier (NLC) have been proposed as a carrier’s category for pharmaceutical and cosmetic ingredients and an increasing of interest due to a series of advantages when compared to conventional formulations. The Amazonian vegetable fats are considered lipids arrays of great potential for the production of NLC from topical administration, according to the low toxicity and biocompatibility, beyond their emollient properties, protector and moisturizer in the skin. The murumuru (Astrocaryum murumuru Mart.) is an amazon palm and the utility of its fat is promising, because it adds value to the products, favour the growth in the region, in addition to using these resources in a sustainable way. The objective of this research was to obtain and characterize the NLC from the vegetable fat of Murumuru (Astrocaryum murumuru Mart.) by the homogenization technique under high pressure to hot, using ketoconazole as a drug modelling. The gas chromatography showed lauric acid (48,1 %), myristic acid (26,6 %) and oleic acid (8,4 %), as main constituents. The physical-chemical characterization showed acid, iodine, saponification, peroxide, refraction and density values within the limits and standards recommended. The isolated raw materials and the NLC obtained were evaluated using differential scanning calorimetry, where the results about the isolated raw materials used support as was described in Literature and the NLC demonstrated a crystalline structure less ordained. In the tested formulations, the nanoparticles showed average size between 98,60 and 161,56 nm, polydispersibility index between 0,115 and 0,276, zeta potential higher than -30mV and encapsulation efficiency near 100 %. The Transmission Electron Microscopy indicated spherical aspect of the nanoparticles and the! clearance profile showed a zero order kinetic model, with the release of 70,9 % of the encapsulated drug in 8 hours. The nanoparticles remained stable during a period of 60 days. This research showed that the murumuru fat obtained an effective system, with small sizes particles and penetrability in the skin, making possible the formulation propagation in pharmaceutical and cosmetic uses.
Acesso aberto (Open Access)
Produção de biodiesel da gordura de murumuru (Astrocaryum murumuru) via catálise heterogênea
(Universidade Federal do Pará, 2010-09-24) TEIXEIRA, Louise Carolina Gonçalves; FRANÇA, Luiz Ferreira de; http://lattes.cnpq.br/6545345391702172; CORRÊA, Nádia Cristina Fernandes; http://lattes.cnpq.br/5763999772352165
This work investigated the feasibility of Murumuru oilseed (Astrocaryum murumuru) as raw material for biodiesel production through the use of heterogeneous catalysis in the basic transesterification. Murumuru is a fruit composed of pulp and kernel, producing about 50% of white fat, odorless, with the advantage of not be tasteless easily because it is rich in saturated fatty acids of short-chain such as for lauric and myristic. The biodiesel is conventionally production through the basic homogeneous catalysis. However this catalysis presents a few inconvenients, such as saponification of esters and the difficulty of removing the catalyst. On the otter hand, the heterogeneous catalytic route avoids the drawbacks of homogeneous catalysis, reducing the amount of aqueous effluent generated during the process and reuse of catalysts. The heterogeneous catalyst hydrotalcite, was synthesized and evidenced by analysis of X-ray fluorescence, X – ray diffraction, thermal analysis, textural analysis (BET method) and electronic scanning microscopy. A complete factorial planning was conducted using methanol as reacting product. Independent variables were temperature, molar ratio and catalyst concentration and the response variable was the conversion, measured through spectrophotometric method. These reactions were conducted in to a pressurized batch reactor. The best conversion found through factorial planning was 88,97% for molar ratio of methanol/oil worth 12, temperature of 200ºC and catalyst concentration equaling 6% in 1 hour of reaction. For this condition, kinetic studies were performed and tested the use of ethanol; through the kinetic study a good correlation can be achieved between the kinetic constants and conversion when using the model that considers reversible reaction, chemical reaction as controlling stage following the Eley Rideal mechanism.