Concepcoes estratigraficas em analise de Bacias: A) a estratigrafia tradicional

This article is the first part of an overall theme dealing with different stratigraphic approaches to basin analysis. The traditional stratigraphy, based on formal units, is discussed here with an attempt to analyse their principles, methods and purposes. Using the Permian carboniferous sequence of Parana Basin as a paradigm, some critical inferences concerning the limitations of such an approach in environmental reconstruction are attained. -English summary

Concepcoes estratigraficas em analise de bacias: C) a estratigrafia genetica

The present work fits the concepts of depositional systems and depositional sequence as paralithostratigraphic and parachronostratigraphic units, respectively, and discusses the advantages of using this approach in environmental reconstructions. The depositional system concept came to a focus as a link between sedimentology and stratigraphy since it represents both a facies association and a mapping unit. Additionally, the depositional sequence represents the sedimentary episode of relative sea level change, in interaction with basin paleophysiography. In such a way a time-space diagnosis is reached in environmental interpretation as illustrated by the Permian-Carboniferous sequence of the Parana Basin. -English summary

Variaveis da ocupacao do solo e analise multivariada

Photointerpretative and multivariate statistical techniques were applied to variants of soil use measured in 4 hydrological basins of third order ramification, belonging to Tiete basin municipal district of Botucatu, Sao Paulo State. The aim was the grouping of basins of second degree of similarity, as well as to infer spatial distribution representativeness. The hydrological basins were located in 3 physiographic regions, with peripheric depression, cuesta front and cuesta backslope, embracing the following soil units: Regosol intergrade to Red Yellow Podzolic and intergrade to Red Yellow Latosol, Red Yellow Latosol-sandy phase, Litosol basaltic substract phase and Purple Latosol. The results obtained allow the conclusion that soil use not always reflects its fertility. -after English summary

Aplicacao da analise discriminante no estudo hidroquimico does rios Corumbatai e Piracicaba (SP)

The results indicated potassium as the most important for the discrimination between groups of samples, followed by magnesium, calcium and sodium. As the area has been under intense sugar cane industrialisation, the soil and the river waters of the region receive a high content of vinasse rich in potassium. -from English summary

Spikes em espectrometria alfa para analise de amostras geologicas

The technique of isotope dilution has been extensively utilized for determining the content of trace elements in geological samples; it has been especially useful for the determination of 238U and 234U contents in crustal materials with measurements made by alpha spectrometry. 232U-228Th has usually been used as diluent (spike) during the application of this analytical technique. More recently, 236U and 229Th have been used. Some methodological problems concerning the utilization of these spikes are presented with examples of experimental data obtained in analyses of groundwater and borehole spoil samples from Morro do Ferro, Pocos de Caldas (MG). -from English summary

ANALISE ANTIGENICA DE PROTEASES DE DIFERENTES CEPAS DE TRICHOMONAS VAGINALIS ISOLADAS DE PACIENTES DA REGIAO DE ARARAQUARA, SP, BRASIL

Trichomonas vaginalis is the flagellate that causes trichomonadiasis, a sexually transmitted disease. Immunological methods have been proposed for the study of antigenic characterization using strains isolated from different patients. This work compares protease profiles from the different strains using gelatin containing polyacrylamide gels to analyse the protease activity. High molecular weight proteases (20 to 100 kDa) were found on gels showing quantitative differences. Human IgG antiproteases were detected by immunoblotting using the same extracts. These proteases could be related with T. vaginalis pathogenesis.

Estabilidade física de péletes protegidos por diferentes produtos impermeabilizantes

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

O uso das fractais e multifractais na analise geografica

The fractal and multifractal approaches in the geographical analysis. This paper results from a bibliographical research showing the applications of the fractal and multifractal approaches in the geographical studies. At first describes some text books about fractals and, after, focuses the works did concerned with Physical Geography, Meteorology, Climatology, Geomorphology, Pedology and Human Geography.

Analise de desempenho de observadores de estado robustos na localizacao de falhas

The state observers can reconstruct and monitor unmeasurable states. A new concept of fault detection and isolation using state observers is presented. The method selects the parameters from components that may fail during the process and constructs optimized robust observers. To isolate component failures via robust observation, a bank of detection observers is organized, in which each observer is only sensitive to one specified component failure while robust to all other component failures. This paper analyzes the performance of transient and steady-state behavior of the state observer.

Avaliação dos produtos de degradação oxidativa da Hb S em eritrócitos de doentes falcêmicos

Analysis of the products of oxidative degradation of Hb S was made by methahemoglobin measurement and a count of red blood cells with Heinz bodies. Free radicals originating from oxidation cause extensive injury to erythrocytes, decreasing their useful survival period especially in Hb S carriers. The Superoxide ion (O 2) is the most responsible for the oxidation process of Hb forming membrane-bound haemachromes which afterwards evolve to Heinz bodies, damaging the membrane and provoking erythrocytes hemolysis. The results from this work showed that the SS genotype is more susceptible to the action of the free radicals than the S/Tal genotype. The β genotype has a lower oxidative susceptibility than the SS because it has only one β s mutation. The results allowed us to conclude that: a) the simple presence of Hb S, independent of its genotype and its concentration, is sufficient to produce methaemoglobin from this Hb; b) there is not a direct relationship between methaetnoglobin concentration and the Heinz bodies count; c) the intensity of Heinz bodies in the sickled erythrocytes seems to be independent of the Hb Fetal concentration; d) The genotype SS is more susceptible to Hb oxidation with the release of products of oxidative degradation; e) methaemoglobin formation in blood of people with Hb AA and Hb AS, assessed over 24, 48, 72 and 163 hourly-periods, showed greater oxidative intensity in the Hb AS compared with Hb AA.

Ativação de macrófagos por produtos naturais obtidos da Achillea millefolium L. (Asteraceae)

Plants are a valuable source of natural products for the maintenance of human health. The purpose of this paper was the study of immunologic activity of yarrow (Achillea millefolium L.), a largely used plant in popular medicine that has many different properties such as: antiinflammatory, astringent, antiseptic and antispasmodic. Macrophages stimulation was evaluated by the determination of H2O2, NO and TNF-α in supernatants of peritoneal macrophages cultures of mice in the presence of the yarrow leaves extract. The thin layer chromatography of extract was also analyzed, showing rutin. All concentrations showed a moderate release of H2O2 and the concentrations of 6, 8 and 10mg/mL had a higher release of NO. The TNF-a was produced in all concentrations, but the best result was obtained at 4mg/mL. Analyzing the results, it is suggested that the yarrow ethanolic extract can modulate the macrophages activation.