Federal University of Grande Dourados

Dourados, Brazil

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Menegazzo M.L.,Federal University of Grande Dourados | Petenuci M.E.,Federal University of Grande Dourados | Fonseca G.G.,Federal University of Grande Dourados
Food Chemistry | Year: 2014

In this study, crude oil was extracted by heating and filtering of the residual fat obtained from the processing of mechanically separated meats of Nile tilapia (Oreochromis niloticus) and hybrid sorubim (Pseudoplatystoma corruscans × P. fasciatum) for protein concentrate obtaining. The crude oil was refined by the following steps: degumming with 85% phosphoric acid, neutralization with 20% NaOH, washing with hot water at 85 C, drying at 90 C, clarification with activated charcoal and filtration with diatomaceous earth and anhydrous sodium sulfate. The quality of crude and refined oils was verified by acidity, peroxide, iodine, refractive, and saponification indexes, beyond moisture, lipid and free fatty acids contents, and density. The results show that the refining reduced the acidity index of the crude oil, however, favored the oil oxidation, as demonstrated by the increase in peroxide index. In most of the cases there was no change in the identity of the fish oils. © 2014 Elsevier Ltd. All rights reserved.

The aim of this paper is to present aspects about the energy balance of sugarcane crops and its carbon dioxide emissions. We calculate energy used in agricultural, industrial and distribution sectors by five sugarcane mills of Mato Grosso do Sul and we compare the yield with its energy delivery. The energy balance obtained, with an average 6.8, shows that is advantageous to produce ethanol in the lands of that Brazilian state. We have prepared a forecasting of electricity production from bagasse taking into account two types of technology. Finally, we present the potential value of CO2 emitted by the five mills to evaluate greenhouse gas emissions of the ethanol production valor chain. © 2012 Elsevier Ltd.

Niccio J.,Federal University of Grande Dourados | Ucha M.A.,Federal University of Grande Dourados
Florida Entomologist | Year: 2011

Tephritidae and Lonchaeidae (Tephritoidea) are major pests of horticultural crops worldwide. Knowledge of the interactions between these flies and their host plants is needed for rational methods of population control. In the South Pantanal and adjacent areas in Brazil we sampled fruits from 92 plant species (22 orders and 36 families) in natural environments. Fifty-three species of plants were infested, and 39 not infested. Some aspects of the biology and patterns of species diversity, abundance, frequency, pupation period for males and conspecific females, and the interactions among species of frugivorous flies and their host plants were quantified. Twenty-six species of flies from 4 genera and 2 families were reared from the fruits: 17 species of Tephritidae (16 Anastrepha spp. and Ceratitis capitata), and 9 species of Lonchaeidae, comprising 8 species of Neosilba McAlpine, and 1 species of Lonchaea Falln (Lonchaeidae). The lonchaeids infested 48 species of fruits, and the tephritids 30 species. The most polyphagous species were Neosilba zadolicha McAlpine & Steyskal (36 hosts), Neosilba pendula (Bezzi) (18 hosts), and Neosilba inesperata Strikis & Prado (14 hosts) (Lonchaeidae); and Anastrepha sororcula Zucchi (10 hosts), Ceratitis capitata (Wiedemann) (10 hosts), Anastrepha obliqua (Macquart) (7 hosts), and Anastrepha zenildae (6 hosts) (Tephritidae). All the males of Tephritidae (16 Anastrepha spp. and C. capitata) emerged before their conspecific females. Conversely, all females of the 8 species of Neosilba emerged in advance of their conspecific males. Copyright © 2011 BioOne All rights reserved.

Neves E.F.,Federal University of Grande Dourados
Genetics and molecular research : GMR | Year: 2012

One of the most important attributes that allowed the evolution and maintenance of sociality in insects is their ability to distinguish members of their own colonies. The capacity for individual recognition in social insects is mediated by chemical signals that are acquired soon after the adult emerges, and vary according to the tasks performed by individuals in their colonies. We determined the time when adults of the wasp Mischocyttarus consimilis acquire the chemical signature of their colonies, as well as the variation in the cuticular hydrocarbon profiles of the exoskeleton of individuals, according to their functions in the colony. The method used was Fourier transform infrared photoacoustic spectroscopy directly on the gaster of each individual. Young wasps take three to four days to acquire the colony's chemical signature, with a small change on the fifth day, when the cuticular hydrocarbon profile of the workers is more similar to that of the queens than that of the males, probably because they are of the same sex, but primarily because of the similarity of tasks executed by these two groups of females in the colonies.

Estevan A.O.,Federal University of Grande Dourados | de Oliveira S.M.V.L.,Federal University of Mato Grosso do Sul | Croda J.,Federal University of Grande Dourados
Revista da Sociedade Brasileira de Medicina Tropical | Year: 2013

Introduction: Jailed populations exhibit high rates of tuberculosis (TB) infection and active disease. Methods: A cross-sectional study was performed to estimate the prevalence of latent and active TB and to identify factors associated with latent infection in inmates. Results: The prevalence of latent TB was 49%, and the prevalence of active TB was 0.4%. The presence of a Bacille Calmette-Guérin (BCG) scar (prevalence ratio (PR)=1.65; 95% confidence interval (CI): 1.09-2.50; p=0.0162) and the World Health Organization (WHO) score for active TB in prisons (PR=1.07; 95% CI: 1.01-1.14; p=0.0181) were correlated with infection. Conclusions: The identification of associated factors and the prevalence of latent and active TB allows the development of plans to control this disease in jails.

Sanjinez-Argandona E.J.,Federal University of Grande Dourados | Chuba C.A.M.,Federal University of Grande Dourados
Revista Brasileira de Fruticultura | Year: 2011

Fruits of the Bocaiuva palm - Acrocomia aculeata (Jacq.) Lodd. ex Mart. - collected at Dourados (MS) and Presidente Epitácio (SP), were analyzed in relation to the biometric characteristics chemical composition and physical characteristics, in order to evaluate the food potential. The Bocaiuva fruits showed no significant differences in the biometric characteristics. The average yield of pulp was 42% compared to the whole fruit, higher than found in the literature for other fruits of palm trees. The physical and chemical characteristics of the fruit pulps from MS and SP regions showed that the pulp was little acid (pH 5.70 to 6.29). Samples from Dourados were sweeter (14.53% of total reducing sugars) and had higher content of vitamin C (34.57 mg.100g -1) than samples from Presidente Epitácio (11.46 mg.100g -1). However, the intensity of the yellow-orange was higher in the pulp from Presidente Epitácio indicating higher content of carotenoids in the later.

De Oliveira L.H.,Federal University of Grande Dourados | Trindade M.A.G.,Federal University of Grande Dourados
Analytical Chemistry | Year: 2016

A baseline-corrected second-order derivative procedure and a miniaturized sample preparation based on low-density solvent and ultrasound-assisted liquid-liquid microextraction (LDS-UA-LLME) was combined to provide the simultaneous electroanalysis of three fluoroquinolones (FQ) as emerging contaminants (ECs). The enhanced mathematical processing provided the best separation with an accurate measurement of the overlapping peaks during the simultaneous electro-oxidation of target FQs that were directly dropped on the surface of carbon nanofiber-modified screen-printed electrodes. The adapted LDS-UA-LLME protocol was the key step involved in the sample preparation, which preconcentrate target analytes from diluted tap water samples with an enrichment factor of around 80×, allowing their quantification at trace levels. This combined feature demonstrated the unique application of an electroanalytical technique for the simultaneous electroanalysis of three FQs in spiked tap water samples, with recovery values remarkably close to 100%. © 2016 American Chemical Society.

Serra H.,Federal University of Grande Dourados
Neotropical entomology | Year: 2011

We combined two models to investigate the theoretical dynamics of five exotic and native blowfly species in response to the Allee effect by using demographic parameters estimated from experimental populations. Most of the results suggest stabilization of dynamic behavior in response to the Allee effect. However, the results depended on the magnitude of the demographic parameters of each species, and also indicated chaotic fluctuations and limit cycles. The results are discussed in the context of larval aggregation, an important biological process for blowflies, which naturally incorporates the Allee effect.

Caires A.R.L.,Federal University of Grande Dourados | Lima V.S.,Federal University of Grande Dourados | Oliveira S.L.,Federal University of Mato Grosso do Sul
Renewable Energy | Year: 2012

In a recent paper published by our group (M.D. Scherer et al. J. Fluoresc. 21 (2011) 1027-1031), we showed that fluorescence spectroscopy has a potential to be used to determine the biodiesel content in the diesel/biodiesel blends. However, this method presents some challenges that must be overcome to be successfully applied. For instance, the method must work with biodiesel produced from different vegetable oils and fats. In the present study, we evaluated the ability of fluorescence spectroscopy to quantify the biodiesel concentration in diesel/biodiesel blends prepared from different feedstocks. Four different blends prepared using biodiesel produced from four refined vegetable oils (canola, sunflower, corn, and soybean) were used in the present investigation. For all samples, the fluorescence spectra were collected between 300 and 800 nm when excited at 260 nm. Our results revealed that the four blends presented a similar emission profile with a maximum at 470 nm. Furthermore, the same fluorescence behavior (emission intensity as a function of biodiesel content) was observed for all blends. Therefore, the results showed that fluorescence-based method for quantifying the biodiesel content in the diesel/biodiesel blends is independent of the refined vegetable oil used in the biodiesel production. © 2012 Elsevier Ltd.

De Souza A.C.C.,Federal University of Grande Dourados | Silveira J.L.,São Paulo State University
Renewable and Sustainable Energy Reviews | Year: 2011

Various reports concerning catalytic reaction of glycerol for hydrogen production is available. However, economic analyses of this activity are not found yet. The objective of this work is to evaluate the process of hydrogen production via steam reforming of glycerol obtained through transesterification process of bio-oils. The thermochemical process of steam reforming process was determined due to high efficiency, feasibility and lower cost of design, development, operation and maintenance. These bio-oils come from feedstocks largely encountered in Brazil such as soybean, palm, castor bean, peanut and cotton seed as also come from residues such as defective coffee, tallow beef, wastewater (scum) and others. Various findings were obtained such as potential of production of glycerol utilizing residues (considering available amounts in the Brazilian states) and some vegetable feedstocks (considering production of harvested feedstock per hectare). Subsequently, production of hydrogen via steam reforming of generated glycerol, and foreseen electricity production via fuel cells were also determined. An additional estimation was paid for production of H-BIO, an innovative fuel developed by PETROBRAS (Petróleo Brasileiro S.A.), where hydrogen and bio-fuel are utilized and generates propane as co-product. About this work, it was concluded that high amounts of hydrogen and electricity could be produced considering an enormous potential from each cited feedstock being an attractive alternative as distributed electricity source and as an additional source for some activities, inclusively those that produce their own feedstocks such as abattoirs (beef tallow), and wastewater treatment plants. © 2010 Elsevier Ltd. All rights reserved.

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