Results 21 to 30 of about 7,557 (176)

FISIOGRAFIA DA PAISAGEM E ASPECTOS BIOGEOMORFOLÓGICOS DO LAVRADO, RORAIMA, BRASIL

open access: yesRevista Brasileira de Geomorfologia, 2016
Este estudo discute a relevante interação entre os aspectos morfológicos do relevo (Geomorfologia) correlacionados com os aspectos de distribuição da biota (Biogeografia). A região aqui discutida, esta inserida dentro do domínio morfoclimático amazônico,
Thiago Morato Carvalho   +2 more
doaj   +1 more source

QUESTÕES DE ORÇAMENTO

open access: yesAmbiente, 2019
O objetivo desta pesquisa é analisar o orçamento público estadual destinado ao desenvolvimento dos programas temáticos executados pela Polícia Civil do Estado de Roraima nos PPA’s do período de 2012 a 2019.
Andréia Saraiva Ximenes
doaj   +1 more source

Neblinichthys roraima

open access: yes, 2006
Published as part of Francisco Provenzano & Nadia Milani, 2006, Cordylancistrus nephelion (Siluriformes, Loricariidae), a new and endangered species of suckermouth armored catfish from the Tuy River, north-central Venezuela., pp.
Francisco Provenzano, Nadia Milani
openaire   +2 more sources

Boana roraima

open access: yes, 2019
Published as part of Barrio-Amorós, César L., Rojas-Runjaic, Fernando J. M. & Señaris, J. Celsa, 2019, Catalogue of the amphibians of Venezuela: Illustrated and annotated species list, distribution, and conservation, pp. 1-198 in Amphibian & Reptile Conservation (e 180) (e 180) 13 (1) on pages 66-67, DOI: 10.5281/zenodo ...
Barrio-Amorós, César L.   +2 more
openaire   +2 more sources

Avaliação de eficiência do curso introdução prática à programação de computadores

open access: yesRCT: Revista de Ciência e Tecnologia, 2023
Investigamos a eficiência do curso para o ensino do comportamento de “escrever programas de computador em Python”. Participaram sete calouros de computação cuja tarefa foi (1) responder a prova de conhecimentos sobre programação no início e ao final do ...
Jasson Marques Fontoura Júnior   +8 more
doaj   +1 more source

Synthesis and application of alginate@CuFe2O4 polymeric spheres in 17‐β‐estradiol adsorption processes in Amazonian rivers

open access: yesPolymer International, EarlyView.
Magnetic alginate beads, functionalized with copper ferrite, effectively remove 17‐β‐estradiol from Amazonian water, exhibiting optimized 238.65 μg g−1 capacity, fast 40 min kinetics, easy recovery, and successful remediation. Abstract The presence of endocrine‐disrupting compounds, such as 17‐β‐estradiol, in aquatic ecosystems poses a significant ...
Dante S Silva   +10 more
wiley   +1 more source

Palaeomagnetism of the Roraima Dolerites [PDF]

open access: yesGeophysical Journal International, 1968
Consistent palaeomagnetic data have been obtained from 19 out of 31 sampling sites in the thick Proterozoic dolerite sills which intrude the Roraima sandstones of the Guiana Shield in Venezuela and British Guiana (now Guyana). Fourteen of these sites, most of which are in noritic dolerite, have remanence orientations which fall into two significantly ...
openaire   +1 more source

Narcogarimpo: las afinidades electivas entre los frentes de minería ilegal y la expansión del narcotráfico en la Amazonía brasileira

open access: yesUrvio
Este estudio lleva a cabo una interpretación sociohistórica de los frentes de minería ilegal y sus afinidades con los dos grupos criminales, Comando Vermelho (CV) y Primeiro Comando da Capital (PCC), que se expandieron violentamente desde Rio de Janeiro ...
Rodrigo Pereira Chagas
doaj   +1 more source

Illegal Gold Mining in the Brazilian Amazon: Environmental Degradation in Yanomami Indigenous Lands, and Regulatory Failures

open access: yesSustainable Development, EarlyView.
ABSTRACT Illegal gold mining has emerged as a major sustainability threat in the Amazon, eroding Indigenous rights, forest integrity, and climate mitigation efforts. This study examines how international market incentives relate to the expansion of illegal mining and associated deforestation within the Yanomami Indigenous Territory (YIT) from 2008 to ...
Shirléia Lago Santos   +2 more
wiley   +1 more source

Belostomatidae (Heteroptera: Nepomorpha) held in the Invertebrate Collection of the Instituto Nacional de Pesquisas da Amazônia, Manaus, Brazil: inventory and new distributional records

open access: yesPapéis Avulsos de Zoologia, 2019
Belostomatidae is a family of giant water bugs with 52 valid species in Brazil. Here, we list 33 valid species housed in the Invertebrates Collection of the Instituto Nacional de Pesquisas da Amazônia - INPA, Manaus, Brazil. Of the total species examined,
Thaís Melo de Almeida   +2 more
doaj   +1 more source

Home - About - Disclaimer - Privacy