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Search Results: 1 - 10 of 203395 matches for " Gustavo G. Fonseca "
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Utilization of Agro-Industrial Residues and Municipal Waste of Plant Origin for Cellulosic Ethanol Production  [PDF]
Fabiano A. Gon?alves, Eliana J. Sanjinez-Argando?a, Gustavo G. Fonseca
Journal of Environmental Protection (JEP) , 2011, DOI: 10.4236/jep.2011.210150
Abstract: Today’s search for alternative sources of energy to reduce the use of fossil fuels is motivated by environmental, socioeconomic and political reasons. The use of agro-industrial and municipal wastes of plant origin for ethanol production appears to be the best option to solve the dilemma of using food sources to produce biofuels, since it adds value to these wastes in eco-efficient processes. This paper highlights the potential of agro-industrial and municipal wastes for cellulosic ethanol production.
Cryptic Speciation in Brazilian Epiperipatus (Onychophora: Peripatidae) Reveals an Underestimated Diversity among the Peripatid Velvet Worms
Ivo S. Oliveira,Gustavo A. Lacorte,Cleusa G. Fonseca,Alfredo H. Wieloch,Georg Mayer
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0019973
Abstract: Taxonomical studies of the neotropical Peripatidae (Onychophora, velvet worms) have proven difficult, due to intraspecific variation and uniformity of morphological characters across this onychophoran subgroup. We therefore used molecular approaches, in addition to morphological methods, to explore the diversity of Epiperipatus from the Minas Gerais State of Brazil.
Synthesis and biological activity of acetates of copper (II) and iron (III) for the control of Aedes aegypti (Diptera: Culicidae) Síntese e atividade biológica de acetatos de cobre (II) e ferro (III) para o controle de Aedes aegypti (Diptera: Culicidae)
Jéssica V. Nardeli,Claudio T. de Carvalho,Marcelo Alves Teixeira,Gustavo G. Fonseca
Orbital : the Electronic Journal of Chemistry , 2012,
Abstract: This work aimed to the synthesis of basic acetates of Cu (II) and Fe(III) against larvae of Aedes aegypti and Gram negative and Gram positive. The transition metal ions Cu (II) and Fe (III) have bactericidal activity and are toxic to Aedes aegypti larvae in the eggs and larval stages of initial, precludes the eggs hatch and slow reproductive cycle of the insect. The theme investigates the importance of carboxyl groups in complex formation, transport and cellular internalization of the toxic ions. It is known that the bactericide or insecticide activity is due to metal ions and Cu (II)or Fe (III). O trabalho objetivou-se a síntese de acetatos básicos de Cu(II) e Fe(III) por via carbonato para análise de atividade contra larvas de 3o instar de Aedes aegypti e bactérias Gram negativa e Gram positiva para controle do microambiente de reprodu o do inseto. Os íons de transi o Cu(II) e Fe(III) possuem bioatividade e s o tóxicos para formas imaturas do A. aegypti nos estágios de ovos e larvais, podem inviabilizar a eclos o dos ovos e/ou inibir/retardar o ciclo reprodutivo do inseto. O tema investiga a importancia dos grupos carboxilas na forma o dos complexos metálicos, o transporte, e, a internaliza o celular de íons tóxicos Cu(II) e Fe(III) as formas imaturas do Aedes aegypti, para o exercício da atividade inseticida e/ou bactericida por rea o de estresse oxidativo in situ.
Lipoinjerto laminar: un tratamiento prometedor con factores vasculares estromales para las vulvo-vaginitis crónicas
Stocchero,Ithamar N.; Stocchero,Gelde H.F.; Stocchero,Gustavo F.; Stocchero,Vivian G.Z.; Fonseca,Alexandre S.F.; Fonseca,Eleonora F.S.;
Cirugía Plástica Ibero-Latinoamericana , 2009, DOI: 10.4321/S0376-78922009000300005
Abstract: one of the most inconvenient situations for a woman, mostly if young, is the recurrent vulvo-vaginitis. with the presence of a returning genital herpes infection, with its permanent pain, the sexual life of the couple will be a point of discordance that may lead to an unsustainable intimacy. the authors relate a successful case of a new treatment that consists in a submucosal lamellar fatgrafting, with preservation of the stromal vascular fraction (sfv) rich in adipose derived stromal/stem cells (adscs) and able to induce a neoangiogenesis, that will promote the normal immunological defense of the mucosa of the vagina, providing against the use of antibiotics and expensive therapies, and, most of all, leading to a normal sexual life. the successful technique used in this case is described in the article.
The IVP for the Benjamin-Ono equation in weighted Sobolev spaces
German Fonseca,Gustavo Ponce
Mathematics , 2010,
Abstract: We study the initial value problem associated to the Benjamin-Ono equation. The aim is to establish persistence properties of the solution flow in the weighted Sobolev spaces $Z_{s,r}=H^s(\R)\cap L^2(|x|^{2r}dx)$, $s\in\R, \,s\geq 1$ and $s\geq r$. We also prove some unique continuation properties of the solution flow in these spaces. In particular, these continuation principles demostrate that our persistence properties are sharp.
Comparisons of the Properties of Whitemouth Croaker (Micropogonias furnieri) Surimi and Mechanically Deboned Chicken Meat Surimi-Like Material  [PDF]
William Renzo Cortez-Vega, Gustavo Graciano Fonseca, Carlos Prentice
Food and Nutrition Sciences (FNS) , 2012, DOI: 10.4236/fns.2012.311192
Abstract:

The aim of this work was to evaluate and compare the color, texture and sensory characteristics of whitemouth croaker (Micropogonias furnieri) surimi and mechanically separated chicken meat (MDCM) surimi-like material (SLM). The whiteness of the MDCM-SLM was higher (P > 0.05) than that from the surimi. Higher breaking force (P < 0.05) and gel strength (P < 0.05) were also observed for the MDCM-SLM when compared to the surimi. The deformation did not vary significantly for these two products (P > 0.05). The MDCM-SLM was more accepted by the panelists (P < 0.05). The mean scores of overall desirability for MDCM-SLM was similar to that observed for walleye Pollack surimi that is the parameter of quality. The differences in the acceptability of poultry and fish food products are probably due to peoples’ eating habits.


Biodiversity Conservation Demands Open Access
Gustavo Fonseca,Philippa J. Benson
PLOS Biology , 2012, DOI: 10.1371/journal.pbio.0000046
Abstract:
Small mammal species diversity in brazilian tropical primary and secondary forests of different sizes
Fonseca, Gustavo A. B. da;
Revista Brasileira de Zoologia , 1989, DOI: 10.1590/S0101-81751989000300001
Abstract: this study investigated the effects of forest fragment size and habitat structure on species richness and diversity of brazilian atlantic forest small mammal communities. during the course of 17 months of live-trapping, a total of 57, 120 trap nights accumulated in six forest plots. there were three size categories: small (60-80 ha.), medium (860 ha) and large (35, 973 ha). at each site two forest sections were selected for small mammal sampling: one in primary and another in secondary succession stage. a total of 692 individuals belonging to 19 species were trapped 1, 366 times. species diversity was measured using the shannon-wiener index h' and also a weighted version of this index that takes into account the number of individuals of each species trapped at the forests. the modified index was developed specifically for this study. the richest and most diverse forest for small mammals was the large secondary fragment, while the least diverse was the small mammal community of the small primary forest. overall, species diversity is lower among primary forests, and also in forests of decreasing size. however, area sizel species relationship was only observed among secondary forests. it is postulated that primary forests are less complex habitats, when compared to secondary habitats in mid-stages of succession. therefore, area size/species relationships should only be applied to conservation schemes if habitat structure is taken into account. by using multivariate regression methods in the investigation of the structural and size predictors of small mammal species diversity, it was possible to separate the effects of area size from those of habitat structure. approximately half of the variance in small mammal species diversity between secondary forest fragments can be explained by area size, while habitat structure accounts for about 45% of the variation.
Biodiversity Conservation Demands Open Access
Gustavo Fonseca,Philippa J Benson
PLOS Biology , 2003, DOI: 10.1371/journal.pbio.0000046
Abstract:
The Importance of Vertical and Horizontal Dimensions of the Sediment Matrix in Structuring Nematodes Across Spatial Scales
Danilo Candido Vieira, Gustavo Fonseca
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0077704
Abstract: Intensive surveys have been conducted to unravel spatial patterns of benthic infauna communities. Although it has been recognized that benthic organisms are spatially structured along the horizontal and vertical dimensions of the sediment, little is known on how these two dimensions interact with each other. In this study we investigated the interdependence between the vertical and horizontal dimensions in structuring marine nematodes assemblages. We tested whether the similarity in nematode species composition along the horizontal dimension was dependent on the vertical layer of the sediment. To test this hypothesis, three-cm interval sediment samples (15 cm depth) were taken independently from two bedforms in three estuaries. Results indicated that assemblages living in the top layers are more abundant, species rich and less variable, in terms of species presence/absence and relative abundances, than assemblages living in the deeper layers. Results showed that redox potential explained the greatest amount (12%) of variability in species composition, more than depth or particle size. The fauna inhabiting the more oxygenated layers were more homogeneous across the horizontal scales than those from the reduced layers. In contrast to previous studies, which suggested that reduced layers are characterized by a specific set of tolerant species, the present study showed that species assemblages in the deeper layers are more causal (characterized mainly by vagrant species). The proposed mechanism is that at the superficial oxygenated layers, species have higher chances of being resuspended and displaced over longer distances by passive transport, while at the deeper anoxic layers they are restricted to active dispersal from the above and nearby sediments. Such restriction in the dispersal potential together with the unfavorable environmental conditions leads to randomness in the presence of species resulting in the high variability between assemblages along the horizontal dimension.
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