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Search Results: 1 - 10 of 30315 matches for " ?ngelo;Santos "
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The “In-Between” Intercultural Knowledge Production: A Case Study from the Teacher Training Kaingang Ethnicity in Southern Brazil  [PDF]
Miguel Ângelo Silva da Costa, Luci dos Santos Bernardi, Leonel Piovezana, Luzane Mores Bernardi
Creative Education (CE) , 2014, DOI: 10.4236/ce.2014.522217
Abstract: As a reflection of an ongoing research project, whose wider scope of analysis focuses in the expectations and produced stares about indigenous education by students of Kaingang ethnicity enrolled in Graduation Bachelor Courses in Indigenous Intercultural Pedagogy, Mathematics and Sciences of Nature, all three offered by the Universidade Comunitária da Regi?o de Chapecó (Unochapecó), this study problematizes to what extend the intercultural knowledge acquired over the training process of Kaingang indigenous teachers may be converted into reflections focused on their conceptions of education, (re) signification of their identity and autonomy within a context of an intense multiculturalism emergence as well as cultural hybridism, which characterize contemporaneity. The results indicate that, for those students, the intercultural knowledge may be triggering as an instrument of changes, inside and outside their communities; it strengthens and nourishes the debate around the role of formal education, the school and the indigenous teacher as a mediator between worldviews and cultures, in constant confluence.
Critical Education beyond Capital: Challenges on Overcoming Social and Scholar Inequalities over the Stage of Contemporary Education Policies  [PDF]
Maurício Roberto da Silva, Miguel ?ngelo Silva da Costa, Luci dos Santos Bernardi
Creative Education (CE) , 2015, DOI: 10.4236/ce.2015.64048
Abstract: The essay aims to bring the discussion concerning the “Rule of Critical Education” and its confluence together with “Education beyond Capital”. Thus, it is an approach dedicated to reflecting the challenges and possibilities to overcome social and scholar inequalities on the stage of contemporary education policies.
Temas ambientais relevantes
Salati, Eneas;Santos,ngelo Augusto dos;Klabin, Israel;
Estudos Avan?ados , 2006, DOI: 10.1590/S0103-40142006000100009
Abstract: this paper indicates the environmental issues that must necessarily be approached, in brazil, in a near future (2022). a study was made on some aspects of the effects of deforestation and global climate change. a temperature rise around 0,78% has been observed during period of 1917 and 2003 in the piracicaba region. for the amazon region a rise of 0,56% was observed the 20th century. the existing information indicates that not only deforestation but also global climate changes act upon temperature rise. deforestation has direct influence in precipitation decrease. the consequences of global climate change are still unknown, being that some models indicate a precipitation rise and others a decrease. deforestation also provokes great biodiversity loss, estimated between 8.000 to 34.000 species, considering that deforestation raises 1% per year.
Temas ambientais relevantes
Salati Eneas,Santosngelo Augusto dos,Klabin Israel
Estudos Avan?ados , 2006,
Abstract: NESTE trabalho, s o indicados os principais temas ambientais para o Brasil, num futuro próximo (2022). Impactos do aumento da temperatura s o estudados através de cenários, que podem modificar o balan o hídrico em algumas regi es, tendo sido observado um aumento da ordem de 0,78oC no período de 1917 a 2003, na regi o de Piracicaba. Para a regi o amaz nica, foi observado um aumento de 0,56oC durante o século XX. Tanto o desmatamento quanto as Mudan as Climáticas Globais atuam na dire o de um aumento da temperatura, enquanto o desmatamento influi na dire o de uma diminui o das precipita es. O desmatamento provoca, ainda, uma grande perda de biodiversidade, sendo estimadas em uma perda entre 8.000 até 34.000 espécies, considerando-se que o desmatamento aumenta em 1% ao ano.
Selective stimulation of catecholamine release from bovine adrenal chromaffin cells by an ionotropic purinergic receptor sensitive to 2-methylthio ATP
ngelo R Tomé, Enrique Castro, Rosa M Santos, Luís M Rosário
BMC Neuroscience , 2007, DOI: 10.1186/1471-2202-8-41
Abstract: ATP raised the [Ca2+]i in ~50% of the cells. Removing extracellular Ca2+ suppressed the [Ca2+]i-raising ability of 2-MeSATP, observed in ~40% of the ATP-sensitive cells. This indicates that 2-MeSATP behaves as a specific ionotropic purinoceptor agonist in bovine chromaffin cells. The 2-MeSATP-induced [Ca2+]i-rises were suppressed by PPADS. UTP raised the [Ca2+]i in ~40% of the ATP-sensitive cells, indicating that these expressed Ca2+-mobilizing P2Y receptors. UTP-sensitive receptors may not be the only P2Y receptors present, as suggested by the observation that ~20% of the ATP-sensitive pool did not respond to either 2-MeSATP or UTP. The average sizes of the ATP- and 2-MeSATP-evoked [Ca2+]i responses were identical in UTP-insensitive cells. 2-MeSATP stimulated Ca2+ influx and evoked catecholamine release, whereas UTP elicited Ca2+ release from intracellular stores but did not evoke secretion. 2-MeSATP-induced secretion was strongly inhibited by Cd2+ and suppressed by extracellular Ca2+ or Na+ removal. TTX inhibited 2-MeSATP-evoked secretion by ~20%.2-MeSATP is a specific P2X purinoceptor agonist and a potent secretagogue in bovine chromaffin cells. Activation of 2-MeSATP-sensitive receptors stimulates Ca2+ influx mainly via voltage-sensitive Ca2+ channels. For the most part, these are activated by the depolarization brought about by Na+ influx across P2X receptor pores.Extracellular ATP plays an important role in catecholamine release from adrenal chromaffin cells, either facilitating cholinergic stimulation via ionotropic (P2X) purinoceptors or inhibiting evoked release through a delayed action on metabotropic (P2Y) purinoceptors (see [1] and references therein). The latter may provide the basis for an auto-inhibitory feedback loop involving both autocrine and paracrine interactions. There are at least seven P2X receptor subunits encoded by distinct genes, which may form homo- or heterotrimeric ionotropic purinoceptors; functional P2X receptors are Ca2+-permeable a
Functional distribution of Ca2+-coupled P2 purinergic receptors among adrenergic and noradrenergic bovine adrenal chromaffin cells
ngelo R Tomé, Enrique Castro, Rosa M Santos, Luís M Rosário
BMC Neuroscience , 2007, DOI: 10.1186/1471-2202-8-39
Abstract: The [Ca2+]i and the [Na+]i were recorded from immunolabeled bovine chromaffin cells by single-cell fluorescence imaging. Among the ATP-sensitive cells ~40% did not yield [Ca2+]i responses to ATP in the absence of extracellular Ca2+ (Ca2+o), indicating that they expressed P2X receptors and did not express Ca2+- mobilizing P2Y receptors; the remainder expressed Ca2+-mobilizing P2Y receptors. Relative to AD-cells approximately twice as many NA-cells expressed P2X receptors while not expressing Ca2+- mobilizing P2Y receptors, as indicated by the proportion of cells lacking [Ca2+]i responses and exhibiting [Na+]i responses to ATP in the absence and presence of Ca2+o, respectively. The density of P2X receptors in NA-cells appeared to be 30–50% larger, as suggested by comparing the average size of the [Na+]i and [Ca2+]i responses to ATP. Conversely, approximately twice as many AD-cells expressed Ca2+-mobilizing P2Y receptors, and they appeared to exhibit a higher (~20%) receptor density. UTP raised the [Ca2+]i in a fraction of the cells and did not raise the [Na+]i in any of the cells tested, confirming its specificity as a P2Y agonist. The cell density of UTP-sensitive P2Y receptors did not appear to vary among AD- and NA-cells.Although neither of the major purinoceptor types can be ascribed to a particular cell phenotype, P2X and Ca2+-mobilizing P2Y receptors are preferentially located to noradrenergic and adrenergic chromaffin cells, respectively. ATP might, in addition to an UTP-sensitive P2Y receptor, activate an UTP-insensitive P2Y receptor subtype. A model for a short-loop feedback interaction is presented whereby locally released ATP acts upon P2Y receptors in adrenergic cells, inhibiting Ca2+ influx and contributing to terminate evoked epinephrine secretion.Adrenal chromaffin cells secrete norepinephrine and the stress-related hormone epinephrine in response to acetylcholine output from splanchnic nerve terminals. Its function is modulated by other transmitters an
Sex ratio and morphological characteristics of rufous gnateaters, Conopophaga lineata (Aves, Passeriformes) in Atlantic forest fragments
Dantas, Gisele P. M.;Santos, Fabrício R.;Marini, Miguel ?ngelo;
Iheringia. Série Zoologia , 2009, DOI: 10.1590/S0073-47212009000100017
Abstract: unequal sex ratios lead to the loss of genetic variability, decreasing the viability of populations in the long term. anthropogenic activities often disturb the natural habitats and can cause alterations in sex ratio and morphological characteristics of several species. forest fragmentation is a major conservation concern, so that understanding its effects in natural populations is essential. in this study, we evaluated the sex ratio and the morphological characteristics of rufous gnateaters (conopophaga lineata (wied, 1831)) in small and large forest fragments in minas gerais, brazil. birds (n = 89) were sexed by plumage characteristics and molecular markers. the molecular analysis showed that plumage is not a totally reliable method for sexing rufous gnateaters. we observed that sex ratio did not differ between large and small forest fragments, but birds in small fragments had larger wings and tarsus. wing and tarsus changes may affect the movement ability of individuals within and among forest fragments. in conclusion, rufous gnateaters have been able to survive in both small and large atlantic rain forest fragments without altering their sex ratio, but morphological changes can be prejudicial to their long term survival.
Esteatose e esteatohepatite n?o-alcoólica nos pacientes com hepatite cr?nica pelo vírus da hepatite C
Coral, Gabriela;Mattos, Angelo Alves de;Mattos,ngelo Zambam de;Santos, Diogo Edele dos;
Arquivos de Gastroenterologia , 2006, DOI: 10.1590/S0004-28032006000400004
Abstract: backgroud: hepatic steatosis is a common finding in patients with hepatitis c, mainly virus c genotype 3. steatosis in these cases might be associated with antiviral treatment response and with prognosis of chronic hepatitis. aims: to determine the presence of steatosis and non-alcoholic steatohepatitis in chronic hepatitis c and its correlation with genotype and hepatic fibrosis. patients and methods: one hundred and twenty patients with chronic hepatitis c were retrospectively evaluated; genotype was done in 102 patients. all specimens were stained with hematoxylin-eosin, picrosirius and perls. staging of hepatitis c was scored by brazilian classification and the diagnosis of non-alcoholic steatohepatitis by the american association for the study of liver diseases criteria results: steatosis was found in 65 of 120 cases (54.2%); it was mild in 37/65 (56.9%), moderate in 12/65 (18.5%) and severe in 10/65 (15.4%). in relation to fibrosis, 80 of 120 patients had mild fibrosis f0-f2 (66.6%) and 40 (33.3%) had more advanced fibrosis (f3 or f4). steatosis was associated with genotype 3 (76.7%) in comparison with other genotypes (49,0%). there were no relationship between steatosis and advanced fibrosis f3/f4 (52,5%) or mild fibrosis (54,4%). non-alcoholic steatohepatitis was diagnosed in 8/120 cases (6.7%) and was significantly associated with hepatitis c virus genotype 3 and with advanced fibrosis (f3 and f4) conclusions: the presence of steatosis and non-alcoholic steatohepatitis in chronic hepatitis c are associated to genotype 3; moreover non-alcoholic steatohepatitis was correlated with more advanced fibrosis.
Fatores condicionantes de sucesso e/ou mortalidade de micro e pequenas empresas em Santa Catarina
Grapeggia, Mariana;Lezana, Alvaro Guillermo Rojas;Ortigara, Anacleto ?ngelo;Santos, Paulo da Cruz Freire dos;
Produ??o , 2011, DOI: 10.1590/S0103-65132011005000025
Abstract: the article's objective is to describe which factors affecting to the success and/or the mortality of micro and small companies in the state of santa catarina are. it was elaborated, therefore, a field study with a sample of companies registered on junta comercial do estado de sc from 2000 to 2004. the data were analyzed in quality and quantity method under two perspectives: i) relevant factors on enterprise's history (real), which highest averages grades were given to the product/market knowledge, business focus, identification of opportunities, organization and product' suitability; and ii) factors that the entrepeneur believes to be the most important for the success (ideal), which highest averages grades were given to the organization, the relationship among the partners, the knowledge about the market, the business focus and the identification of oportunities.
Fa?amos Químicos: a "certid?o de nascimento" dos cursos de química de nível superior no Brasil
Santos, Nadja Paraense dos;Pinto,ngelo C.;Alencastro, Ricardo Bicca de;
Química Nova , 2006, DOI: 10.1590/S0100-40422006000300035
Abstract: this work presents a brief retrospective of josé de freitas machado's prominent role in the creation, development and consolidation of chemistry undergraduate courses in brazil. freitas machado defended in many occasions the importance of chemical studies for the economic development of this country. we analyze, here, his important paper "fa?amos químicos" [let's make chemists] (1917), seminal for the implantation of industrial chemistry undergraduate courses in brazil.
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