Results 271 to 278 of about 1,550,416 (278)

CARACTERIZAÇÃO FITOFISIONÔMICA DA RESTINGA DE ALGODOAL MARACANÃ, PARÃ, BRASIL

1995
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Bastos, Maria de Nazaré do Carmo., Rosário, Carlos Silva, Lobato, Luís Carlos Batista   +2 more
openaire   +1 more source

Evaluación de parámetros de avance y rotación para soldadura en aluminio mediante proceso FSW

REVISTA TECNOLOGÍA & DESARROLLO, 2016
El siguiente artículo reporta los resultados de ensayos en tensión de platinas de aluminio AA1050 soldadas a tope mediante el proceso Friction Stir Welding (FSW), para ello se utilizó una fresadora vertical ROMI U-30 de 3Hp de potencia y una herramienta de soldadura (PIN) diseñada en SolidWorks y confeccionada en acero AISI 3115 carburizado. Las
Alexander Vega Anticona, Eddy Quiroz Grados   +1 more
openaire   +1 more source

The Bosque at Pará

1929
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire   +1 more source

Determination of total mercury in workers' urine in gold shops of Itaituba, Pará State, Brazil

The Science of The Total Environment, 2000
Gold extraction and its commercialization in the Amazon region is mainly by rudimentary procedures. Therefore, during the process of extraction and recovery of this precious metal, large amounts of mercury vapors are thrown into the environment. This paper is an attempt to establish a correlation between the concentration of total mercury in the urine ...
R, Santa Rosa, R C, Müller, C N, Alves, J E, Sarkis, M H, Bentes, E, Brabo, E S, de Oliveira   +6 more
openaire   +2 more sources

Evaluation of total mercury concentrations in fish consumed in the municipality of Itaituba, Tapajós River Basin, Pará, Brazil

The Science of The Total Environment, 2000
The environmental exposure to mercury by riverine and Indian communities can occur through the ingestion of fish and products contaminated by mercury compounds. The present study aims to evaluate the total mercury concentration in the different fish species most consumed in the municipality of Itaituba, Tapajós river basin, where there are intense gold-
L S, dos Santos, R C, Müller, J E, de Sarkis, C N, Alves, E S, Brabo, E O, Santos, M H, Bentes   +6 more
openaire   +2 more sources

Parã-Nambuco: ocupação espacial e trabalho indígena na capitania de Pernambuco nos séculos XVI e XVII

2023
openaire   +1 more source