Browsing by Issue Date, starting with "2006-03-31"

Filter results by year or month

Now showing 1 - 20 of 22348

Avaliação da qualidade final de juntas dissimilares de ligas de alumínio 2024-6056 e 7075-6056 soldadas por FSW - friction stir welding
(Universidade Federal de São Carlos, 2006-03-31)
Potomati, Fernanda
;
Alcântara, Nelson Guedes de
;
https://lattes.cnpq.br/3123107570992184
;
https://lattes.cnpq.br/1449729356742076
The aeronautic industry has been studying the FSW (Friction Stir Welding) process since its development by TWI (The Welding Institute), in 1991. Nowadays it has been used in the airplanes fuselage of the Eclipse Aviation Co. and in non structural parts of the Airbus A380, in recent times started. Thus, the knowledge on welding of aeronautic aluminum alloys is very important to give safety in the use of the process and to development of new possibilities of joints for these alloys. Dissimilar welding allows some freedom on project design i.e. possibilities to join materials with different properties. The challenge of this work is to join materials with different mechanical properties using FSW, which is based on mechanical deformation. For this aim, dissimilar joints, 2024-T351 to 6056-T4 and 7075-T76 to 6056-T4, have been welded. The rotational speed was maintained constant and the travel speed was variable. The best parameters were identified according to the final quality of the welds after microstructural analyses and mechanical properties evaluation (tensile and microhardness tests). The analyses of the thermal cycles and forces developed during the weld, and the evaluation of the quality weld determine the best parameters that can produce a better combination between heat input and the best weld quality. It is concluded that the mechanical properties of the dissimilar joints improve with increasing weld travel speed and when the 6056 alloy is placed in the advancing side of the joint.
Canal virtual de tempo-real
(Universidade Federal de São Carlos, 2006-03-31)
Panont, Fernando Sales
;
Moron, Célio Estevan
;
https://lattes.cnpq.br/8635476812779360
;
https://lattes.cnpq.br/2658267569270335
Due to the increase of general purpose operational systems support for real-time applications and by the increasing number of network interfaces with multiple communication technologies present in one single computational device, a middleware, with real-time characteristics, was designed and developed. This middleware encapsulates these communication technologies and protocols in order to improve fault tolerance and consequentially comply with deadlines for message transmission through connectivity options supply. Moreover, the Real Time Virtual Channel provides a virtual access point address mechanism, where each address maps a set of real access points from the consumer endpoint. For the translation of these addresses in real access points, name servers, known as Brokers, were also implemented.
A teoria do sentido em Deleuze
(Universidade Federal de São Carlos, 2006-03-31)
Lopes, Luiz Manoel
;
Ferraz Júnior, Bento Prado de Almeida
The proposal of this work is to study the theory of sense in Deleuze inserted in the questions that reverberate on the contemporaneous philosophical field. Our route will follow the statements of Deleuze on his book Logic of Sense , especially when he detaches that this theme was thought by three different ways: the first, as lekton, by the Stoics on the III century B.C.; the second, as complexe significable, by Gregori di Rimini, on the XIV century; the third as obektiv, by Meinong, on the XIX century. When Deleuze thinks about his theory of sense, he introduces the sense as event.. Our study will start from the rosen questions by Meinong and how they have their origin on the paradox of the representation without object rosen by Benhard Bozano , which allows us to affirm that such paradox is at the origins of the phenomenology and in the analytic philosophy. The theory of the sense of Deleuze will be presented like being out from these two current contemporaneous philosophies.
Uso do Senso Comum na detecção de diferenças culturais no contexto do Projeto OpenMind CommonSense no Brasil
(Universidade Federal de São Carlos, 2006-03-31)
Tsutsumi, Marie
;
Silva, Junia Coutinho Anacleto
;
https://lattes.cnpq.br/6200743168568684
;
https://lattes.cnpq.br/9693310314992265
Knowing what is specific about each culture would be helpful to perform cross cultural communication, because different cultures have different notions of how to begin and develop conversations. Due theses difficulties in differences in cultural norms, we are working to provide to computers this knowledge, since computer environment can allow communication across distance and across cultures. In order to provide to computers cross cultural knowledge, we have collected large knowledge bases representing Common Sense knowledge because we believe that Common Sense knowledge can give some guidelines about different cultures. In our research, we have used bases containing sentences describing common sense knowledge of people and everyday activities, beliefs and values collected from volunteer Web contributors. Furthermore, we describe experiences with these knowledge bases, and we are proposing software which automatically searches for cultural differences related to eating habits, alerting the user to potential differences among cultures. In this way, we hope that our work will contribute to software that takes better account of such differences, and fosters inter-cultural collaboration
Ação do laser de baixa intensidade e da eletroestimulação na regeneração nervosa periférica
(Universidade Federal de São Carlos, 2006-03-31)
Benato, Davilene Gigo
;
Parizotto, Nivaldo Antonio
;
https://lattes.cnpq.br/5527703735628408
;
https://lattes.cnpq.br/1386161474488016
Em memória das mãos: o desencantamento da técnica na arquitetura e no urbanismo
(Universidade Federal de São Carlos, 2006-04-01)
Lopes, João Marcos de Almeida
;
Ferraz Júnior, Bento Prado de Almeida
The ideal ways of composition betwen matter and form establish opositions that contributes for a dualist conception of the world. The production of the Building and the City is, historicaly, deeply marked by this conception, organizing the technical activity in the practice of the architect and urbanist trade in diferent fields and, anytime, opposites: form & function, form & contents, theory & practice or even mesmo theory & technic. Through a fenomenology of the technics exercises and of the technics object existence way, I try to grasp some essenciality in the technics activity by itself. After this, reintroductioned the technics action and the technics objets in the world of life, trying to grasp how is the transformation of technic into technology, alleged how undelighted agency of the arguments in a technical racionality. Starting form its development in the history, I resume some technological conceptions wich is controling the architectural debate in the presents times and to them I stand against one conception of technical action non hilemorphic in the practice of the trade.
Características estruturais e institucionalização de redes de poder em perspectiva comparada.
(Universidade Federal de São Carlos, 2006-04-05)
Figueiredo, Jeovan de Carvalho
;
Paulillo, Luiz Fernando de Oriani e
;
https://lattes.cnpq.br/9919942357089937
The present study proposal is to advance in the comprehension that it has been called out, in the last years, of Brazilian economy dynamo: the agribusiness. From the conception of policy network, this paper has been sought to determine how the different policy networks in Mato Grosso do Sul s cattle breeding have gotten conformed. For such, it has been undertaken a study of multiple cases. For the milky territorial policy network case, it has been adopted as unit of analysis the political process that resulted on the inclusion of the type C pasteurized milk in the government's State acquisitions of Mato Grosso do Sul, destined to a specific social program, the Programa de Segurança Alimentar e Nutricional (PSAN) Program of Feeding and Nutritional Security. Therefore, the unit of analysis of beef cattle culture territorial policy network was the Programa de Melhorias na Cadeia Produtiva da Carne - Improvements Program in the Productive Network of Beef, orchestrated by the Serviço de Apoio às Micro e Pequenas Empresas de Mato Grosso do Sul (Sebrae/MS) - Support Service to the Mato Grosso do Sul small sized companies (Sebrae/MS). The results indicate that beef cattle culture territorial policy network can be seen as a political community, arrangement in network already well known in the literature, and that the milky policy network, weakly integrated and with multiple participants, it setups another specific type, that approaches the ideal model of diffused network. The results of this study show that the institutional densification in the political community of beef in Mato Grosso do Sul has brought positive results for the network organizations, as the shared use of resources for the training of actors technically deficient. The milky diffused network, then, is composed of actors who get results just limited in the strategic interaction. The ownership of resources, as it is clear, is enlarged when the actors get adapted to the wide institutional context that permeates their activities, letting thus the reference old frames that for decades, guided the decision taking in this agri business.
Sociabilidades respeitadas: a participação dos idosos na implementação da Política Nacional do Idoso no município de São Carlos -SP
(Universidade Federal de São Carlos, 2006-04-05)
Emérito, Jamila Lopes Pereira
;
Mancuso, Maria Inês Rauter
;
https://lattes.cnpq.br/3208435983286140
;
https://lattes.cnpq.br/7759843508112473
This work intended to avaluate the implications of “Old-aged National Politics – PNI” in the city of São Carlos, São paulo, in 2003 and 2004. The participation of technicians and the old-aged themselves in the local construction of this politics was investigated. It was done a qualitative avaluation, because it permitted a close relation among the subject of the research and also a more dense analysis of the social relation of the groups. Quantitative data were used for the analysis done. In order to get the informations, city places of oldaged representation were monitorred in a sistematic way, meanly the groups coordinated by the public manager responsible for PNI city implementation, represented by the city secretary for citzenship and social assistence and the city concil for old-aged, in function of the municipality of the public politics of social inclusion, where is inserted the PNI, according to 1988’s Constitution. It was demonstrated that old-aged en São Carlos – SP still don’t see themselves as constructers of old-aged politcs in the city and that this process is slow, gradual, but in this specific case, progressive. There’s a perception of PNI as a collective right under the obligation of the state. The participation of old-aged in groups organized by local society or the public manager operates initially for individual reasons and their envolvement as constructers of public politics oriented to stablish and reforce citzen’s rights, envolves, among all, the universilization and internalization of information and interation between different generations.
"Periferia é periferia em qualquer lugar?" Antenor Garcia: estudo de uma periferia interiorana
(Universidade Federal de São Carlos, 2006-04-06)
Ávila, Milene Peixoto
;
Toledo, Luiz Henrique de
;
https://lattes.cnpq.br/5366260223109463
;
https://lattes.cnpq.br/4358156870857557
This work intends to characterize the outskirts of a town which I named "countryside outskirts". Based on researches about the way Antenor Garcia´s inhabitants represent and simbolize the relationship established between their neighborhood, the periphery of Cidade Aracy and City of Sao Carlos I focused on problems as for analysis cathegory.
Treinamento físico no limiar ventilatório e orientação nutricional no tratamento de diabéticas tipo 2
(Universidade Federal de São Carlos, 2006-04-07)
Belli, Taísa
;
Silva, Rozinaldo Galdino da
;
https://lattes.cnpq.br/8047342611840826
Análise genética e morfométrica da estrutura populacional do camarão branco Litopenaeus schmitti (Decapoda , Crustacea) na costa do Rio Grande do Norte, Brasil: uma abordagem em fina escala
(Universidade Federal de São Carlos, 2006-04-10)
Luvesuto, Eloize
;
Galetti Júnior, Pedro Manoel
;
https://lattes.cnpq.br/7398754661670478
The natural populations of the white shrimp Litopenaeus schmitti are being threatened by intensive fishing, habitat destruction and introduction of exotic culture species. This species presents characteristics related to its distribution and life cycle that may lead to the fine-scale structuring of its populations. The results obtained in the present work by biometric and microsatellite analysis indicated the existence of genetic and morphological structure between three populations sampled off the coast of the State of Rio Grande do Norte. This structuring was more pronounced for females than males, observing the significant differentiation between Diogo Lopes x Touros and Diogo Lopes x Baía Formosa. The factors responsible for this differentiation seem to be related to the habitat and life cycle of the shrimp and the ocean currents. No population was in the Hardy- Weinberg equilibrium, probably due to the significant heterozygote deficit (FIS=0,212, p<0,05). The assignment tests indicated a larger inflow of migrants in the Baía Formosa Diogo Lopes direction, a probable result of the Brazilian Northern Current and the Brazilian North Undercurrent. When the allelic richness and number of private alleles were compared, it was seen that Diogo Lopes and Touros presented similar and significantly larger values than those of Baía Formosa, corroborating the situation of the estuaries that influences each of these populations. The Mantel test did not show isolation by distance, indicating that the populational structure found is due to genetic and genotypic differences. The results obtained in the present work show for the first time that Brazilian shrimp populations may be genetically distinct even with small geographic distances, reinforcing the particular role of estuaries in the maintenance of this genetic diversity.
Alfabetização de adultos na perspectiva de educandos: experiências pessoais e sociais
(Universidade Federal de São Carlos, 2006-04-15)
Garcia, Stella de Lourdes
;
Reyes, Cláudia Raimundo
;
https://lattes.cnpq.br/1903278004759421
The objective of this work was to identify and to analyze which personal and social experiences are relating to the beginning of reading and writing learning, in the perspective of adult learners. This is a qualitative inquiry, whose search involved the accomplishment of interviews half-structuralized with six learners, that they had been part in 2003 of the Program of Alphabetization, Brasil Alfabetizado , implanted in the city of São Carlos - SP, Brazil, in which we act as educator. In our theoretical referential we present the characterization of the informational society, some inequalities configured in its interior and we argue the direction of the critical alphabetization in Paulo Freires s and others authors perspective, as Henry Giroux and Ramón Flecha. We analysed the content of the interviews, the personal and social experiences in the interior of the illiteracy had been classified as no dialogic experiences, therefore they disabled the social interchange and limited learners in the personal sphere. The reading and writing learning allowed positive experiences in the personal and social sphere, making possible the recovery of self-confidence of adult learners and the transformation of some of the situations of oppression lived deeply by learners, because to learn reading and writing means the appropriation of an instrument that allows the intervention in the reality. However, we emphasize the necessity of an alphabetization practice that consider both reading of the world and reading of the word , that they privilege the dialectic between the instrumental and communicative dimension, as important stage of the social transformation, that it is only become fullfilled in communion, in dialogue. The learners also interviewed had offered reflections for educators, as well as for the elaboration of public politics in the Alphabetization and Education of Adults areas.
Ponderação de modelos com aplicação em regressão logística binária
(Universidade Federal de São Carlos, 2006-04-18)
Brocco, Juliane Bertini
;
Candolo, Cecília
;
https://lattes.cnpq.br/9942864590854913
This work consider the problem of how to incorporate model selection uncertainty into statistical inference, through model averaging, applied to logistic regression. It will be used the approach of Buckland et. al. (1997), that proposed an weighed estimator to a parameter common to all models in study, where the weights are obtained by information criteria or bootstrap method. Also will be applied bayesian model averaging as shown by Hoeting et. al. (1999), where posterior probability is an average of the posterior distributions under each of the models considered, weighted by their posterior model probability. The aim of this work is to study the behavior of the weighed estimator, both, in the classic approach and in the bayesian, in situations that consider the use of binary logistic regression, with foccus in prediction. The known model-choice selection method Stepwise will be considered as form of comparison of the predictive performance in relation to model averaging.
Estudo das comunidades de macroinvertebrados bentônicos das Represas do Monjolinho e do Fazzari no campus da UFSCar, município de São Carlos, SP
(Universidade Federal de São Carlos, 2006-04-20)
Fusari, Lívia Maria
;
Gessner, Alaíde Aparecida Fonseca
;
https://lattes.cnpq.br/8465752836529703
The objective of this study was to analyze the macroinvertebrate benthic communities in two small reservoirs, Monjolinho Reservoir and Fazzari Reservoir, both are localized in the campus of the Federal University of São Carlos, São Carlos city, São Paulo state, but they are on different anthropogenic disturbance. The samplings were carried out during the dry (April June) ant the wet (November December) seasons in 2004. In each dams the sampling were collected in 12 points random. At each site, three sampling units were taken with an Eckman-Birge sampler. Also were determinate more three sampling points at upstream in Monjolinho and Fazzari streams. Several physical and chemical variables were measured at each site and the means calculated to every season. Differents metrics were applied to compare the macroinvertebrate communities between the reservoirs. The analyses indicate that, overall, community persistent is correlated with the state environmental of each reservoir. The macroinvertebrate benthic community in Monjolinho reservoir was characterized by tolerant species dominant like Chironomus sp and Limnodrilus hoffmeisteri, they are very commons in trophic systems. In the other side in Fazzari reservoir, the no tolerant species (Chaoboridae and Campsurus sp) were dominants, this is an indication that the system is oligotrophic.
Determinação de fontes de hidrocarbonetos policíclicos aromáticos e alifáticos em sedimentos de ambientes aquáticos
(Universidade Federal de São Carlos, 2006-04-20)
Yamada, Thaís Mariana
;
Mozeto, Antonio Aparecido
;
https://lattes.cnpq.br/6594211224864538
Numerical values of polycyclic aromatic hydrocabons and n-alkanes distribution indexes of sediments are important tools to elucidate the origins of hydrocarbons mixtures. Polycyclic aromatic ratios are sensitive indicators of petrogenic and pyrogenic inputs, while n-alkanes distribution usualy discriminates biogenic from petrogenic sources. The study area of this work includes the Ibirité Reservoir and it´s tributaries, located in the Belo Horizonte metropolitan area, a site strongly affected by a petroleum refinary from Petrobras, but where an important industrial park is also present. Sampling was carried out in November 2005, at 12 stations located on Ibirité Reservoir, Pintados and Ibirité streams. The sediment samples were extracted in ultrasonic bath, purified in chromatographic columns and analysed by GC/MS. The studied compounds were polycyclic aromatic hydrocarbons, normal and isoprenoids alkanes. The total concentrations varied from 33.66 to 772.61 ng g-1. Despite of these low concentration values as compared to other aquatic environment, the Ibirité Reservoir showed strong inflluence from anthropic activities, reflected on petrogenic and pyrogenic hydrocarbons mixtures. The biogenic hydrocarbons, mainly derived from aquatic and terretrial higher plants, also showed its contribution as a result of algal blooms and extensive aquatic macrophyte banks typically found in the reservoir. Besides, the presence of unresolved complex mixtures in all chromatograms, points out to a significant contribution of petrogenic sources. Contamination of some sediment sample detectect in this study by polycyclic aromatic hydrocarbons migth suggest that occasional adverse effects to the organisms in this water body may occur. The sampling station of Taboões I stream was the only one site that petrogenic controbuition was not detected. However, the site that was considered as a reference site, showed that it suffers, already, influences from burned fossil fuel from industries and automobiles from the nearby Belo Horizonte metropolitan area.
Efeitos do exercício físico moderado e da suplementação da dieta com vitamina C no crescimento e no metabolismo de matrinxã, Brycon cephalus (Günter, 1869) (Teleostei:Characidae)
(Universidade Federal de São Carlos, 2006-04-20)
Oba, Eliane Tie
;
Rantin, Francisco Tadeu
;
https://lattes.cnpq.br/3546242299713690
Moderate exercise training is known to enhance fish appetite, feed conversion efficiency and growth rate. This type of exercise raises the hematocrit, thus blood hemoglobin concentration and the oxygen carrying capacity of the blood. This allows that less blood needed to be diverted away from the gut to supply aerobic metabolism in the muscles. Continuously swimming fish show lowered circulating levels of stress hormones (like cortisol) and this represents an energy saving and permits higher fish growth rate, with more homogenous body size. All aerobic living forms have defenses against reactive oxygen species. Oxygen consumption can increase with exercise training and this result in a higher production of reactive oxygen species. Antioxidants, like vitamin C, in the diet can reduce the disease risks and the oxidative damage by the reactive oxygen species. The aim of this study was to verify growth and oxidative metabolism of matrinxã, Brycon cephalus, after moderate and continuous exercise training (speed 1 2 BL.s-1) and after fed with vitamin C supplemented diet (432 mg AA.kg dieta-1). Matrinxãs were divided into four groups: Control (submitted to diet without vitamin C supplementation and to sedentarism), Vit.C (submitted to diet with vitamin C supplementation and to sedentarism), Exe (submitted to diet without vitamin C supplementation and to exercise training) and Vit.C+Exe (submitted to diet with vitamin C supplementation and to exercise training), during 60 and 90 days. After these treatments, matrinxãs were anesthetized and blood samples were collected with heparinized needles and syringes by caudal vein puncture. Fish were sacrificed by vertebral section, weighed and lengthened. Liver, white and red muscle and heart were collected for the biochemistry analysis. Plasma cortisol levels, liver vitamin C concentration, intermediary metabolite levels (glucose, glycogen, lactate, pyruvate and ammonia) and oxidative stress indicators (lipid hydroperoxide, superoxide dismutase and glutathione peroxidase) were measured. The exercise training increased growth rate of matrinxãs indicated by the condition factor and the maintenance of the liver glycogen levels and the higher muscle protein concentration. This moderate swimming exercise raised the hematocrit of matrinxãs and lowered the plasma cortisol levels. The vitamin C supplemented diet enhanced hepatic levels of this vitamin. This supplementation did not permit the increase of growth rate, however it reduced the lipid peroxidation levels. Exercise and vitamin C supplemented diet associated were responsible for the maintenance lipid peroxidation and antioxidants enzymes levels. After 90 days of experiment period, the group Vit.C+Exe showed similar growth and condition factor to the group Exe. The moderate exercise training with vitamin C supplemented diet increased the growth and the survive rates of matrinxãs, B. cephalus, due to the some alterations on the metabolism, improving the fish condition and favoring the fisheries production.
Ativação do subtipo de receptor 5-HT1A do núcleo paraventricular do hipotálamo sobre a ingestão de água e sódio
(Universidade Federal de São Carlos, 2006-04-20)
Villa, Patrícia de Souza
;
Camargo, Luiz Antonio de Arruda
;
https://lattes.cnpq.br/9899442765636817
Hypothalamic paraventricular nucleus (PVN) has an important role in the hydroeletrolytic balance and it also participates in the regulation of water and sodium intake. Recent researches described the presence of 5-HT1 receptors in the central nervous system, standing out the subtypes 5-HT1A, 5-HT1B, 5-HT1C and 5-HT1D. The receptor 5-HT1A was one of the firsts to be identified and it is found in the somatodendritic and pos-synaptic forms. It has been showed the participation of PVN 5-HT1A receptor in the hydroeletrolytic balance. Therefore, the aim of this study was: a) To investigate the effects of bilateral injections of serotonin (5-HT) in the PVN about water intake induced by water deprivation and water and 1.8% NaCl intake induced by sodium depletion; b) To investigate the effects of 8-OH-DPAT injection, an 5-HT1A agonist, in the PVN about water intake induced by water deprivation and water and 1.8% NaCl intake induced by sodium depletion; c) To investigate the action of pMPPF, an 5-HT1A antagonist, into the PVN on the effects of 5-HT and 8-OH-DPAT on the water and 1.8% NaCl intake. Holtzman rats (280-320 g) were submitted to the implant of cannulas bilaterally in the PVN. For the implant, the animals were adapted to a stereotaxic apparatus. Using the bregma, introduction points of the stainless steel cannulas were identified according to the coordinates: 1.8 mm caudal to bregma, 0.6 mm lateral to the midline and 5.0 mm below dura mater. 5-HT injections (10, 20, 40 and 50 µg/ 0,2 µl) in the PVN reduced the water intake (13.4±2.0; 12.6±1.3; 12.9±1.0 and 9.0±2.9 ml/ 30 min vs. sal: 18.4±0.8 ml/ 30 min, respectively, n = 6-8) and the doses 10 and 20 µg/ 0.2 µl reduced the 1.8% NaCl intake (7.9 ± 3.0 and 9.0 ± 2.1 ml/ 30 min, respectively, vs. sal: 17.7 ± 1.8 ml/ 30 min, n = 7). 8-OH-DPAT injections (1.0, 2.5 and 5.0 µg/ 0.2 µl) in the PVN reduced the water intake (15.4 ± 1.3; 14.8 ± 1.2 and 14.2 ± 0.9 ml/ 120 min vs. sal: 19.1 ± 1.0 ml/ 120 min, n = 10) and the doses 2.5 µg and 5 µg also reduced 1.8% NaCl intake (12.4 ± 2.7 ml/ 60 min vs. sal: 19.3 ± 1.0 ml/ 60 min; 12.2 ± 1.8 ml/ 120 min vs. sal: 20.0 ± 1.0 ml/ 120 min, respectively, n = 9). pMPPF bilateral injections (5-HT1A antagonist) preview to 8-OH-DPAT injections have completely blocked the inhibitory effect over water intake (sal + DPAT: 13.8 ± 1.1 ml/ 90 min vs. pMPPF + DPAT: 16.4 ± 1.1 ml/ 90 min, n = 12) and 1.8% NaCl (sal + DPAT: 11.4 ± 2.9 ml/ 30 min vs. pMPPF + DPAT: 17.6 ± 1.7 ml/ 30 min, n = 8). 5-HT1A antagonist partially reduced the inhibitory effect of 5-HT on water intake induced by water deprivation (sal+5-HT: 5.9±1.6 ml/ 30 min vs. pMPPF+5-HT: 12.3±1.1 ml/ 30 min, n=12) as well as on sodium intake induced by sodium depletion (sal+5-HT: 2.8±1.3 ml/ 30 min vs. pMPPF+5-HT: 12.3±1.9 ml/ 30 min, n=15). Our results demonstrate the presence of serotonergic mechanisms in PVN inhibiting water and sodium intake and also the participation of pos-synaptic 5-HT1A receptors on water intake control induced by water deprivation and on sodium intake induced by sodium depletion, and that this receptor doesn t have a tonic inhibitory effect. This work also showed others subtypes serotonergic PVN receptors participating in the dipsogenesis and natriorexigenesis control.
Preparação e aplicação de óxidos tipo perovskita La1-xCexNiO3 e La1-xCaxNiO3 para obtenção de gás de síntese a partir do metano
(Universidade Federal de São Carlos, 2006-04-20)
Lima, Sania Maria de
;
Assaf, José Mansur
;
https://lattes.cnpq.br/9563312407691130
Catalysts precursors with perovskite structure like La1-xCexNiO3 ( x = 0, 0.03, 0.05, 0.1, 0.4 ,0.7) and La1-xCaxNiO3 (x = 0, 0.05, 0.1, 0.3, 0.5, 0.8) have been prepared by three different methods: precipitation, citrate and citrate with successive additions. The loss of mass and structure transformations during the calcination were studied by thermogravimetric and thermodifferential analysis; the calcined samples were characterized by X-ray diffraction, specific surface area measurements (BET method), temperature-programmed reduction, thermogravimetric analysis in H2 atmosphere, temperature-programmed desorption of oxygen, X-ray photoelectron spectroscopy and sequential pulse experiments with CH4/O2/CH4. The catalysts were tested in CO2 reforming and partial oxidation of methane. After the tests, the catalysts surface was studied by scanning electron microscopy and thermogravimetric analysis in oxidant atmosphere. Small quantities of NiO were observed together the perovskite structure even for x = 0 in the solids prepared by all the synthesis methods. In the Ce-La series with x ≥ 0.05 were also identified CeO2 and La2NiO4; the perovskite structure formation for x = 0.7 was not observed. For the samples containing Ca with x ≥ 0.1, in addition to the perovskite structure, was observed NiO and La2NiO4; when x ≥ 0.3 an additional CaO phase was identified. However, in these samples, the perovskite structure was still observed even with high Ca contents. The reaction results of CO2 reforming of methane showed that the Cecatalysts prepared by citrate route presented Ni particles smaller and with better dispersion than the catalysts obtained by precipitation. This was evidenced by the higher resistance to carbon formation. Among these catalysts, the La0.95Ce0.05NiO3 was the most promising because it was the most active and resistant to carbon formation. This carbon deposition resistance was due to the predominance of perovskite structure that resulted in higher dispersion of nickel particles and also to the presence of the incorporated cerium that increased its stability. The Ce containing catalysts obtained by the two citrate methods deactivated during the partial oxidation of methane due to the oxidation of active Ni fractions. These oxide sites favored the CO2 formation via the combustion of methane reaction. In the other hand, the catalysts obtained by precipitation were highly active to CO formation, and the most promising were those with x = 0 and x = 0.05. The Ca content influenced the carbon deposition resistance and the conversion levels in the CO2 reforming of methane. In partial oxidation of methane, for some contents of calcium, the reactants conversion levels have decreased due to the oxidation of active Ni fractions, but there was no carbon formation for all the catalysts.
Detecção e identificação de micobactérias em corpos de água destinados à captação para abastecimento urbano da cidade de São Carlos-SP
(Universidade Federal de São Carlos, 2006-04-24)
Kanai, Karina Yuri
;
Moraes, Gilberto
;
https://lattes.cnpq.br/4427903557163246
Fifty-nine water samples from Feijão River, Monjolinho River and the Water Treatment Station (SAAE) were analyzed, and 51 were positive for mycobacteria. Concerning the two procedures of decontamination, we obtained 83.0% of positive samples isolated with sulfuric acid and 39.0% with cetylpyridinium chloride. We recovered 425 strains of mycobacteria, and 402 were characterized concerning growth rate and pigment production. In drinking water samples there were predominance of mycobacteria with slow growth, wherein 66.7% were scotochromogenics species and 47.5% were identified as M. lentiflavum. The identification was done through biochemical tests and phenotypics features (classical methodology), micolic acid analyses by thinlayer chromatography (TLC) and PCR-Restriction Analysis (PRA). Through the classical methodology associated to TLC 33.3% of the mycobacteria were identified and 18 species were defined. From the 402 mycobacteria 93 strains were selected and submitted to PRA, being 35 identified by the classical and molecular methodology, 51 only identified by PRA and 40% remained obscure concerned identification. The PRA pattern 440 in BstEII and 130/110 in HaeIII was defined as M. new. This pattern was found for 24 strains. For an accurate identification, the association of different methodologies is necessary.
Análise cinesiológica e biomecânica de atividades de manuseio de carga
(Universidade Federal de São Carlos, 2006-04-25)
Padula, Rosimeire Simprini
;
Coury, Helenice Jane Cote Gil
Load handling activities impose great overloads on the musculoskeletal system, increasing the risk of injuries. The fact that these handling activities are considered risky had led to several studies regarding load lifting, lowering, pulling and pushing. The results obtained certainly allowed many findings about influence of different variables on risk factors of these activities. However, other studies are needed, especially about risks by load carrying activities, since the literature has not dealt extensively with this topic. Thus, studies have been carried out about load handling, leading to 4 scientific papers. Study one aimed at comparing two groups of workers, with and without musculoskeletal symptoms in the upper limbs when they performed simulated tasks of handling techniques as to trunk movements and load support. Movements analysis was quantified by a flexible electrogoniometer and contact between load and trunk, by load cells. Nine asymptomatic and 10 symptomatic industrial workers were evaluated. An ANOVA was performed to compare results between symptomatic and asymptomatic workers. Most of the symptomatic workers supported the load on their trunk, whilst most of the asymptomatic did not. Higher values of lumbar flexion occurred for the symptomatic workers (p<0,05). The objective of the second study was ti describe trunk movements in sedentary subjects, and in workers with and without musculoskeletal symptoms, when carrying loads in simulated tasks. The 38 subjects who participated in this study were divided into 4 groups, consisting of 9 male students, 10 female students, 10 female symptomatic industrial workers and 9 asymptomatic industrial workers. The trunk movements of all subjects were recorded by biaxial back electrogoniometer when carrying loads between surfaces of different heights. An analysis of variance for repeated measures were performed, which was followed by the Duncan post hoc test for comparison of anthropometrical data between subjects, amplitude of movement, and time spent in each movement per group and per experimental condition. The height of the surfaces to which the loads were carried to or from, significantly influenced the trunk positions during handling (p<0,01), as if subjects were anticipating the target position whilst handling. Also more time was spent in flexion (p<0,01) than in extension. These aspects increase the risks of possible injury in such activities. The objective of the third study was to describe the kinds of grip used during handling activities of 5Kgf and 10 Kgf loads between surfaces of different height and to quantify flexion/extension movements and wrist radial and ulnar deviations quantified by electrogoniometry. Ten male volunteers participated in this study handled a box between surfaces of different heights. The activities was performed to evaluate significant differences between the anthropometry of volunteers´ hands and between movements used for load handling and different heights. The results showed that the surface heights to which the objects were handled significantly influenced (p=0,000) joint amplitudes, nevertheless there wasn t any difference in the movements for different load masses handled (p=0,43). Time over what is considered advisable was spent in radial deviation when handling involved high surfaces. The fourth study aimed at evaluating the anterior-posterior movements of the trunk and the time spent in task performance by experienced and inexperienced subjects during load handling activities to different target surfaces. The 36 subjects who participated in this study were healthy males, divided into groups of 16 and 20, experienced and inexperience respectively, in the performance of load handling activities. The activities consisted of carrying the 7Kg and 15Kg boxes from a surface at a fixed height to another at a variable height. Lumbar thoracic movements were quantified by a flexible electrogoniometer. Significant differences were found in the time spent to perform the handling between the groups (p<0,008) and between the loads (p<0,000). However, there was no significant difference in the trunk movemets between the groups (p>0,005) and the loads (p>0,005). Surfaces heights to which the box was transported significantly influenced trunks movements (p<0,000).