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.

Orchid’s diversity at Tepequém’s Tepuy, Roraima, Brazil

Abstract: The Orchidaceae family is one of the largest among the angiosperm, with more than 27000 species, 2,500 is endemic to Brazil, 871 species are found in the Brazilian Amazon. In the far north of Brazil, in the state of Roraima, is located the Tepequem Mountains, a Tepuy – mountain top with table shape – with relictual vegetation due to prolonged isolation. Historically, Tepequem was a site of diamond exploration, which caused changes in the landscape. However, with mining decay, ecotourism became the main economic activity. About 68% of Roraima’s territory is composed of conservation areas and indigenous lands, and the Tepequem Mountain is the only Tepuy found outside the protected areas. Thus, this study aims to describe the orchid flora found at Tepequem’s Tepuy, an area of ecological and economic importance for Roraima’s ecotourism. The survey was carried out through expeditions between the years of 2013-2015. The species were photographed, harvested and taken to Embrapa Roraima for identification, exsiccate confection and/or cultivation. The exsiccatae were deposited at Roraima’s Integrated Museum (Museu Integrado de Roraima – MIRR) and the Federal University of Roraima (Universidade Federal de Roraima – UFRR). Any orchid species deposited by other collectors was also considered. Thus, 20 genera and 34 species were registered at Tepequem. The genera with largest representation were the Epidendrum (7 spp.), Scaphyglottis (4 spp.) and Habenaria (3 spp.), with 70% of the other genera presenting one species only. 10% of Roraima’s orchid’s diversity is found at Tepequem. The diversity of habitats – forest, campina and savannah – found at Tepequem’s Tepuy allows the Orchidaceae species diversity and the unique flora with low similarities to other floristic surveys.

PYRENE MORPHOLOGY OF THREE SPECIES OF Byrsonima Rich. ex Kunth (Malpighiaceae)1

Abstract: The species of the genus Byrsonima Rich. ex Kunth are of great medicinal and economic importance, but they are still poorly studied with respect to their propagules. This study describes, illustrates and comparse morphological aspects of the pyrenes of Byrsonima crassifolia (L.) Kunth, Byrsonima verbascifolia (L.) DC. and Byrsonima coccolobifolia Kunth occurring in areas of savannah of Boa Vista, Roraima. The pyrenes are globoid, obovoid to ovoid, with endocarp dark brown in color, with a corrugated and reticulate surface and corneous consistency. They possess distinctly septate locules with or without seeds, the outer wall of which are dark brown in color with corneous consistency and thin black inner walls also with corneous consistency. The number of locules and seeds per pyrene among the species varies. The seeds are exalbuminous, globoid, obovoid to ovoid, with a thin, smooth integument and are light-brown in color. They have radicular lobes and hypostasis. The embryo is continuous and axial with cylindrical spirally rolled cotyledons. The diameter of pyrenes of Byrsonima crassifolia is greater than in the other two species. The pyrenes of B. coccolobifolia are longer and heavier, while those of B. verbascifolia are lighter and the seeds have greater lengths, widths and thickness compared to the other two species studied. The three species have similar morphologies, differing in the size and weight of pyrenes and seeds.

Finanças é Assunto de Criança? Uma Proposta de Educação Financeira nos Anos Iniciais

Abstract: O presente artigo surge de trabalhos realizados pelo Grupo Investigacoes no Ensino de Matematica e Ciencias, Programa de Pos-Graduacao no Ensino das Ciencias na Universidade UNIGRANRIO e tem como objetivo discutir o ensino de Educacao Financeira nos anos iniciais do Ensino Fundamental. Apesar de muitas pessoas acharem que dinheiro nao e assunto para crianca, e necessario refletir sobre valores e posturas da vida adulta que tem sua construcao iniciada na infância, principalmente na sociedade atual em que o consumo vem se tornando uma das principais preocupacoes dos orgaos nacionais e internacionais. Este artigo apresenta argumentos que validam a importância da abordagem dos temas relacionados a financas no âmbito da Educacao Matematica nos anos iniciais, de forma a colaborar na formacao da consciencia cidada do aluno.

Contemporaneidades ameríndias: diante da voz e da letra

Abstract: Apresentacao da secao tematica sobre Contemporaneidades Amerindias, publicada no numero 53 da revista Estudos de Literatura Brasileira Contemporânea