Federal University of Roraima

About: Federal University of Roraima is a based out in . It is known for research contribution in the topics: Population & Thermogravimetry. The organization has 981 authors who have published 1218 publications receiving 7849 citations. The organization is also known as: Federal University of Roraima.

Fenologia, estrutura e produção de sementes em castanhais nativos de Roraima e características socioeconômicas dos extrativistas

Abstract: This paper assesses the phenology, population structure and the fruit and seed production of native Brazil nut trees in the state of Roraima, and characterizes the extractive communities and extraction system practiced in this region of Amazonia. Characterization of the extractive communities and extraction system was done through questionnaires and panel discussions conducted between 2005 and 2010. Analyses of population structure, phenology and fruit and seed production were conducted at sites located in the municipalities of Caracarai and Sao Joao da Baliza, installed between the years 2005-2008. We found that the extraction of Brazil nut makes up a significant part of the income of riverine and indigenous communities but is performed with low levels of social organization, little government support and without any control over the processes that can lead to contamination by aflatoxins. The density and productivity of Brazil nut trees are within the range expected for the Amazon region. We found that Brazil nut tree flowering occurs in the dry season, and lasts five to six months. Dispersal of fruits occurs during four to six months in the rainy season, and peaks between April to June.

Environmental education in the indigenous schools of brasil

Abstract: The environmental education applied within indigenous schools, flowing from categories of fundamental rights overseen in the current Brazilian Constitution, deserves a great deal of reflection and attention by Brazilian educators. Besides promoting the specific elements proper to schools, they should be aware of the root principle of an environmental education shared by indigenous peoples, being the grounds for other equally relevant sub-principles which demand the involvement of the whole community: the promotion of interculturality, transversality and flexible approaches to environmental education in indigenous schools’ syllabuses, undertaken by children and young natives who require a methodology which is more tuned to their social dynamic and, above all, linked to the natural world. This quality of environmental education upholds a view of the sentiment of fraternity, which we should share equally with present and future generations.

Direito ao patrimônio genético como direito transindividual: considerações sobre o caso Sangue Yanomami

Abstract: Aquest article repren la controversia de la Sang Yanomami, en la qual un poblat yanomami va exigir la repatriacio de les mostres de sang indigenes recol·lectades per investigadors estrangers a la jungla amazonica en els anys ’60. Es tracta d’un cas remarcable en el proces de reconeixement de dos drets: el dret a la identitat genetica (dret al genoma) i el dret transindividual al patrimoni genetic de la humanitat (dret genomic). Aquest cas es rellevant, entre d’altres coses, perque permet entendre la demanda yanomami del (i) dret a genoma, exercit col·lectivament per la comunitat, i (ii) el dret de la humanitat a exigir respecte pel seu material genetic en virtut dels seus valors culturals especifics (immaterials) per la comunitat.

O que ocorreu após o episódio de laci de araújo em 2008? a homossexualidade discutida nas forças armadas do brasil

Abstract: O artigo versa sobre a homossexualidade nas Forcas Militares do Brasil, enfatizando o notorio caso de Laci de Araujo, envolvido em uma polemica com repercussao nacional apos o relato nos meios de comunicacao de que o ex-militar mantinha uma relacao homoafetiva com outro militar e que estariam sofrendo discriminacao por parte da Instituicao Militar. O episodio permitiu um questionamento social em temas de aceitacao e negacao de militares homossexuais servirem as Forcas Armadas no/ pais. Para esse tema foi trabalhado no estudo o artigo 235 do Codigo Penal Militar – CPC, que ate a atualidade possui uma tipificacao que condena e discrimina a pratica da relacao homoafetiva, em desacordo com as previsoes constitucionais. Foi realizada uma investigacao bibliografica para a metodologia do estudo. A investigacao conclui pela existencia de ideais preconceituosos que vem discriminado, ao longo dos tempos, as pessoas homossexuais no âmbito militar. Palavras-chave: Militares. Diversidade sexual. Discriminacao.

Soil attributes and root distribution in areas under forest conversion to cultivated environments in south Amazonas, Brazil

Abstract: The objective of this work was to evaluate soil attributes and root distribution in areas under forest conversion to cultivated environments. The study was carried out in four areas: forest, cupuacu, guarana and annatto, located in the municipality of Canutama, state of Amazonas. Soils and volumetric rings were collected in the layers 0.00 – 0.10; 0.10 – 0.20; 0.20 – 0.30; 0.30 – 0.40; and 0.40 – 0.50 m for analyses of physical and chemical attributes and root distribution. Univariate statistical analyses were carried out, the means were compared with the Tukey’s test (p < 0.05) and Pearson’s correlation (p < 0.05 and < 0.01). The forest area and the cultivated environments present soil chemical limitations for agricultural production, whereas the physical attributes presented satisfactory values. The chemical attributes underwent major changes and degradations upon conversion to agriculture. Major changes were observed in the layers of 0.00 – 0.10 and 0.10 – 0.20 m for the studied areas. Cupuacu cultivation showed higher values of roots dry weight (RDW) and roots distribution (RD), with the highest values found in the 0.00 – 0.10 and 0.10 – 0.20 m layers.