7 documents found, page 1 of 1

Gamaespectrometria aplicada ao projeto Rio Preto (GO)

The natural radioelements U, Th and K were characterized in the area of the Rio Preto project, Goiás State, Brazil, that was previously mapped by extint Nuclebrás (today INB – Brazilian Nuclear Industries S.A.) through aerial gamma spectrometry. The laboratory gamma spectrometry through NaI(Tl) scintillation detector was applied to rock samples collected in the area. The following nuclides 40K, 214Bi and 208Tl ...

A radioatividade das rochas na área do projeto Rio Preto - Goiás

Samples from. Rio Preto Project were analyzed by gamma spectrometry, for 45K, 214.8ã (equivalent uranium, eU) and 208T1 (equivalera thoriurn, eTh), and also by alpha spectrornetry for uranium isotopes 235U and "4U. The obtained results allowed to draw maps of radiometric synthesis for each investigated nuclide, which were compared with the already available from the aerial garnmaspectrornetric data. The 234 U,2...

Técnica autorradiográfica para investigação geológica - Estudo de caso na área ...

The auto-radiography is a photographic method to registrate in sensitive emulsion the spatial distribution α rays emitted by radioisotopes of a sample or an object. The auto-radiography was applied to detect the presence of radioactive minerals in some samples of schists and gneisses from the Ticunzal Formation, Northeast Goiás State, aiming to implement the use of this technique in LABIDRO – Hydrochemistry and...

Use of weathered diesel oil as a low-cost raw material to biosurfactant production

Made available in DSpace on 2022-04-29T07:53:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-01-01; This work aimed to investigate the capability of biosurfactant production by bacteria cultures of Staphylococcus hominis, Kocuria palustris and Pseudomonas aeruginosa LBI, isolated from hydrocarbon contaminated areas, using weathered diesel oil from a long-standing spillage as raw material. It was evalu...

Use of vinasse, an ethanol distillery waste, as an amendment to bioremediation ...

Made available in DSpace on 2022-04-29T07:53:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-01-01; This work investigated the possibility of using vinasse as an amendment in bioremediation processes by supplying nutrients and as an extra labile carbon source that could increase the microorganisms population. Soil samples were collected at three petrol stations. At two of them, diesel oil spills occur...

Hidroquímica elementar e dos isótopos de urânio em águas subterrâneas da Formaç...

Correlação entre emanação de gás radônio e porosidade de rochas ornamentais do ...

O presente artigo efetua correlações entre teores de emanação de gás 222Rn e correspondentes índices de porosidade para treze amostras de rochas ornamentais graníticas do Estado do Ceará. Para tanto, são efetuadas determinações dos índices físicos (densidade aparente, porosidade aparente e absorção de água), dos teores de U, do monitoramento de emanação do gás radônio por período de 25 dias em condições de conf...