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Search Results: 1 - 10 of 145317 matches for " F.; Botelho "
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Sr and Nd isotopic characteristics of 1.77-1.58 Ga rift-related granites and volcanics of the Goiás tin province, central Brazil
PIMENTEL, MáRCIO M.;BOTELHO, NILSON F.;
Anais da Academia Brasileira de Ciências , 2001, DOI: 10.1590/S0001-37652001000200010
Abstract: supracrustal rocks of the araí group, together with coeval a-type granites represent a ca. 1.77-1.58 ga old continental rift in brazil. two granite families are identified: the older (1.77 ga) group forms small undeformed plutons, and the younger granites (ca. 1.58 ga) constitute larger, deformed plutons. sr-nd isotopic data for these rocks indicate that the magmatism is mostly product of re-melting of paleoproterozoic sialic crust. initial sr ratios for both granite families are ca 0.726 and 0.720. most tdm model ages are between 2.58 and 1.80 ga. end(t) values are between +3.6 and -11.9. araí volcanics are bimodal, with basalts and dacites/rhyolites interlayered with continental sediments. the felsic volcanics show nd isotopic characteristics which are very similar to the granites, and are also interpreted as reworking of paleoproterozoic crust. detrital sediments of the araí group revealed tdm model ages between 2.4 and 2.16 ga, indicating that they are the product of erosion of paleoproterozoic crust. the data indicate that the araí rift system was established on crust that had just become stable after the paleoproterozoic orogeny.
Sm-Nd isotopic characteristics of 1.77-1.6 Ga rift magmatism in central Brazil
M. M. Pimentel,N. F. Botelho
Chinese Science Bulletin , 1998, DOI: 10.1007/BF02891540
Abstract:
Sr and Nd isotopic characteristics of 1.77-1.58 Ga rift-related granites and volcanics of the Goiás tin province, central Brazil
PIMENTEL MáRCIO M.,BOTELHO NILSON F.
Anais da Academia Brasileira de Ciências , 2001,
Abstract: Supracrustal rocks of the Araí Group, together with coeval A-type granites represent a ca. 1.77-1.58 Ga old continental rift in Brazil. Two granite families are identified: the older (1.77 Ga) group forms small undeformed plutons, and the younger granites (ca. 1.58 Ga) constitute larger, deformed plutons. Sr-Nd isotopic data for these rocks indicate that the magmatism is mostly product of re-melting of Paleoproterozoic sialic crust. Initial Sr ratios for both granite families are ca 0.726 and 0.720. Most TDM model ages are between 2.58 and 1.80 Ga. epsilonND(T) values are between +3.6 and -11.9. Araí volcanics are bimodal, with basalts and dacites/rhyolites interlayered with continental sediments. The felsic volcanics show Nd isotopic characteristics which are very similar to the granites, and are also interpreted as reworking of Paleoproterozoic crust. Detrital sediments of the Araí Group revealed T DM model ages between 2.4 and 2.16 Ga, indicating that they are the product of erosion of Paleoproterozoic crust. The data indicate that the Araí rift system was established on crust that had just become stable after the Paleoproterozoic orogeny.
Outcome and quality of life of patients with acute kidney injury after major surgery
Abelha,F.; Botelho,M.; Fernandes,V.; Barros,H.;
Nefrología (Madrid) , 2009,
Abstract: background: in postoperative critically-ill patients who develop acute kidney injury (aki) it is important to focus on survival and quality of life beyond hospital discharge. the aim of the study was to evaluate outcome and quality of life in patients that develop aki after major surgery. methods: this retrospective study was carried out in a post- anaesthesia care unit with five intensive care beds during 2 years. patients were followed for the development of aki. preoperative characteristics, intra-operative management and outcome were evaluated. six months after discharge, these patients were contacted to complete a short form-36 questionnaire (sf-36) and to have their dependency in activities of daily living (adl) evaluated. chi-square or fischer's exact test were used to compare proportions between groups. a "t test" and a paired "t test" for independent groups was used for comparisons. results: of 1597 patients admitted to the pacu, 1200 patients met the inclusion criteria. one hundred-fourteen patients (9.6%) met aki criteria. patients with aki were more severely ill, stayed longer at the pacu. among 71 hospital survivors at 6 months follow-up, 50 completed the questionnaires. fifty-two percent of patients reported that their general level of health was better on the day they answered the questionnaire than 12 months earlier. patients that met aki criteria after surgery had worse sf-36 scores for physical function, role physical and role emotional domains. six months after pacu discharge, patients that met aki criteria were more dependent in instrumental-adl but not in personal-adl. conclusions: patients that develop aki improved selfperception of quality of life despite having high rate of dependency in adl tasks. for physical function and role physical domains they had worse scores than pacu patients that did not develop aki.
Correla??o entre simetria corporal na descarga de peso e alcance funcional em hemiparéticos cr?nicos
Pereira, Laura C.;Botelho, Ariane C.;Martins, Emerson F.;
Brazilian Journal of Physical Therapy , 2010, DOI: 10.1590/S1413-35552010000300009
Abstract: background: postural control is often impaired in hemiparetic patients. during upright stance, hemiparetic subjects sway more than subjects with an unaffected hemibody, and they assume asymmetrical postures to place less weight on the affected side. objective: to analyze functional reach and dependence on support devices among people with chronic hemiparesis and to investigate the relationships between displacements of functional reach and weight-bearing symmetry during upright stance. methods: fourteen participants with hemiparesis, classified as dependent on support devices or independent from them, were included in experimental procedures to record functional reach displacements and symmetry values. results: no significant differences were found between the dependent and independent participants for any variable. however, when weight-bearing occurred on the unaffected side, the greatest displacements were significantly correlated with the most asymmetrical hemiparetic participants. conclusion: symmetry did not contribute to functional reach or independence from support devices among participants with hemiparesis.
Static phase and dynamic scaling in a deposition model with an inactive species
S. S. Botelho,F. D. A. Aarao Reis
Physics , 2001, DOI: 10.1103/PhysRevE.65.032101
Abstract: We extend a previously proposed deposition model with two kinds of particles, considering the restricted solid-on-solid condition. The probability of incidence of particle C (A) is p (1-p). Aggregation is possible if the top of the column of incidence has a nearest neighbor A and if the difference in the heights of neighboring columns does not exceed 1. For any value of p>0, the deposit attains some static configuration, in which no deposition attempt is accepted. In 1+1 dimensions, the interface width has a limiting value W_s ~ p^{-\eta}, with \eta = 3/2, which is confirmed by numerical simulations. The dynamic scaling relation W_s = p^{-\eta} f(tp^z) is obtained in very large substrates, with z=\eta.
Maximal spaceability in topological vector spaces
Geraldo Botelho,Daniel Cariello,Vinícius Fávaro,Daniel Pellegrino
Mathematics , 2011,
Abstract: In this paper we introduce a new technique to prove the existence of closed subspaces of maximal dimension inside sets of topological vector sequence spaces. The results we prove cover some sequence spaces not studied before in the context of spaceability and settle some questions on classical sequence spaces that remained open.
Youth and Social Security Coverage in Brazil  [PDF]
Paulo Tafner, Carolina Botelho
Open Journal of Social Sciences (JSS) , 2014, DOI: 10.4236/jss.2014.21014
Abstract: Brazil is still a young country, just starting the process of aging, but Brazils spending on social security is similar to those countries whose population aging has already occurred. Some studies explain the high cost of the Brazilian Social Security System due to the assumption that there is a positive relationship between social security and poverty alleviation. In fact, the effectiveness of this instrument as reducing poverty was high until 2002, but stopped growing and fell slightly thereafter. Brazilian law provides that wives and children or stepchildren under age 21, or under 25, since they are college students, are welfare beneficiaries. In other words they are protected by Brazilian Social Security System. However, data reveals that in Brazil, children and young people have a very low social security direct coverage, which increases with age and reaches high levels for individuals aged 60 or older. Children and young people are the groups most affected by poverty and extreme poverty in Brazil. In this sense, the assumption according to which Social Security helps combat family poverty is flawed. Considering these issues, this article aims to contribute to the debate on the need to rethink the Brazilian Social Security System and the need of construction of specific policies for children and young people in Brazil.
Lepidopteran caterpillar fauna on lactiferous host plants in the central Brazilian cerrado
DINIZ, I. R.;MORAIS, H. C.;BOTELHO, A. M. F.;VENTUROLI, F.;CABRAL, B. C.;
Revista Brasileira de Biologia , 1999, DOI: 10.1590/S0034-71081999000400012
Abstract: nine lactiferous plants of five families were examined for caterpillars in a 4 ha cerrado sensu stricto (savanna-like vegetation) area of the university of brasília experimental farm (df, brazil), from august 1995 to may 1997. in 5,540 censuses, less than 5% of the plants hosted caterpillars. all the caterpillars found, a total of 55 species in 15 families were reared under laboratory conditions. pyralidae, geometridae, elachistidae, megalopygidae, and limacodidae were the richest caterpillar families recorded. of the 55 species, more than 40% were polyphagous, feeding on different host plant families, while 21 were considered rare species with less than four records during the study period. the species' rareness did not permit any analysis of diet breadth. the presence of latex in the host plants seems to affect both the proportion of host plants with caterpillars (abundance) and the caterpillar species richness. the habit of eating plants that characteristically produce latex occurs in several distantly-related lepidopteran families. the results support the argument that specific behaviors to circumvent plant latex defense may have arisen independently many times in the lepidoptera.
Lepidopteran caterpillar fauna on lactiferous host plants in the central Brazilian cerrado
DINIZ I. R.,MORAIS H. C.,BOTELHO A. M. F.,VENTUROLI F.
Revista Brasileira de Biologia , 1999,
Abstract: Nine lactiferous plants of five families were examined for caterpillars in a 4 ha cerrado sensu stricto (savanna-like vegetation) area of the University of Brasília Experimental Farm (DF, Brazil), from August 1995 to May 1997. In 5,540 censuses, less than 5% of the plants hosted caterpillars. All the caterpillars found, a total of 55 species in 15 families were reared under laboratory conditions. Pyralidae, Geometridae, Elachistidae, Megalopygidae, and Limacodidae were the richest caterpillar families recorded. Of the 55 species, more than 40% were polyphagous, feeding on different host plant families, while 21 were considered rare species with less than four records during the study period. The species' rareness did not permit any analysis of diet breadth. The presence of latex in the host plants seems to affect both the proportion of host plants with caterpillars (abundance) and the caterpillar species richness. The habit of eating plants that characteristically produce latex occurs in several distantly-related lepidopteran families. The results support the argument that specific behaviors to circumvent plant latex defense may have arisen independently many times in the Lepidoptera.
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