Gamma Spectrometry
Mostrando 1-12 de 94 artigos, teses e dissertações.
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1. Integrating geological and airborne geophysical data to review the cartography of Rio Itanguá Batholith, Araçuaí Orogen, Brazil
ABSTRACT Rio Itanguá Batholith (RIB) is a plutonic body located in the Northern border of Guanhães block, one of the various basement blocks reworked within the Araçuaí orogen, Eastern Brazil. Although its existence is known since the beginning of the 20th century, its tectonic history remains poorly understood. The RIB was mapped at 1:100,000 scale in t
Braz. J. Geol.. Publicado em: 12/09/2019
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2. The role of airborne geophysics in the investigation of gold occurrences in the Itapetim Region, Borborema Province, Northeast Brazil
Abstract We present a combined analysis of airborne geophysical data (magnetics and gamma-ray spectrometry) and field aspects of Itapetim lode gold district region, aiming to identify structurally deformed and hydrothermally altered zones, which are suggestive of gold mineralized sectors. The main geophysical lineaments are oriented in the NE-SW and E-W dire
Braz. J. Geol.. Publicado em: 22/08/2019
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3. Volatile oil of Croton zehntneri per oral sub-acute treatment offers small toxicity: perspective of therapeutic use
ABSTRACT Croton zehntneri Pax & K. Hoffm., Euphorbiaceae, or “canela-de-cunhé” is used in the Northeast Brazil to treat several diseases. Leaves and aerial parts of C. zehntneri are rich in volatile oil of high potential therapeutic. This study aimed to investigate volatile oil systemic toxicity after per oral treatment in rats. Volatile oil characteriz
Rev. bras. farmacogn.. Publicado em: 27/05/2019
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4. Baseline and Quality Reference Values for Natural Radionuclides in Soils of Rio de Janeiro State, Brazil
ABSTRACT A first large-scale systematic survey of natural radioactivity contents of soils of the state of Rio de Janeiro is presented, focused on the establishment of Quality Reference Values (QRVs). Undisturbed soil samples were collected from 243 areas and analyzed by gamma spectrometry. The activity contents varied largely, ranging from 12.2 to 1,029 Bq k
Rev. Bras. Ciênc. Solo. Publicado em: 22/01/2018
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5. 40K, 226Ra AND 228Ra SERIES IN BOVINE AND POULTRY FEED AND IN DICALCIUM PHOSPHATE (DCP) SAMPLES BY GAMMA-RAY SPECTROMETRY
The aim of this study is to determine the amounts of radionuclides' activity present in samples of feed for young and adult chicken and feed for dairy and beef cattle, as well as in dicalcium phosphate (DCP) (CaHPO4), used as a nutritional supplement for animal feed. Radioactivity in these samples is due to the presence of the 238U and 232Th radioactive seri
Braz. arch. biol. technol.. Publicado em: 06/05/2016
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6. Monoterpene isolated from the essential oil of Trachyspermum ammi is cytotoxic to multidrug-resistant Pseudomonas aeruginosa and Staphylococcus aureus strains
Abstract INTRODUCTION: The aim of this study was to determine whether an herbal extract containing monoterpene exhibited activity against multidrug-resistant Staphylococcus aureus and Pseudomonas aeruginosa isolated from clinical infection samples. METHODS: The essential oil of Trachyspermum ammi (L.) Sprague ex Turrill (Apiaceae) fruit was extracted by
Rev. Soc. Bras. Med. Trop.. Publicado em: 2016-04
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7. P(VDF-TrFE)/ZrO2 Polymer-Composites for X-ray Shielding
Poly(vinylidene fluoride – tryfluorethylene) [P(VDF-TrFE)] copolymers were mixed with zirconia nanoparticles. The investigation was conducted with the intention to produce nanocompounds with potential to be used as protective patient shielding in radiological procedures. Polymer based nanocomposites with 1, 2, 3, 5 and 10 wt% of ZrO2 nanoparticles were pre
Mat. Res.. Publicado em: 26/02/2016
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8. Estudo das variações diurnas de radiação gama atmosférica e sua interferência em levantamentos de espectrometria gama aerotransportada / Study of diurnal variations of atmospheric gamma radiation and interference in airborne gamma spectrometry surveys
As concentrações de urânio equivalente, tório equivalente, potássio e taxa de exposição foram determinadas em diferentes dias e horários para um mesmo local, a partir de dados gamaespectrométricos aerotransportados, medidos a uma altura média de 81 metros. Os perfis individuais foram então comparados com os perfis médios de todas as medidas. Os e
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/10/2012
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9. Processamento e modelagem de dados geofísicos e imagens ASTER aplicados à interpretação geológica e prospecção mineral na Província Aurífera de Alta Floresta, MT / Processing and modeling of geophysical data and ASTER images applied to geological interpretation and mineral exploration in the Alta Floresta Gold Province, MT
The Alta Floresta Gold Province (AFGP) is located in the central-southern Amazon craton between the limits of the Ventuari-Tapajos (1.95-1.8 Ga) and Rio Negro-Juruena (1.8-1.55 Ga) provinces. In its eastern segment there are more than one hundred gold deposits hosted in volcanic and plutonic rocks and concentrated along the Peru-Trairao Belt in a NW-SE direc
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/02/2012
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10. CaracterizaÃÃo tecnolÃgica e radiomÃtrica de um diabÃsio da regiÃo de ApuiarÃs - CE / Technological characterization and radiometric a region of diabase ApuiarÃs - CE
This paper presents the technological and mineralogical characteristics of a diabase, which outcrop in the form of dike is located in the district CanafÃstula in ApuiarÃs - CE. In order to assess their qualities for application as ornamental, were carried out technological tests of fitness levels and physical-mechanical, based on standards from ABNT, as we
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/01/2011
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11. Evaluation of hela cell lineage response to β radiation from Holmium-166 embedded in ceramic seeds
This work studied the effects of β radiation of Ho-166 embedded in ceramic seeds on HeLa cells. Methodology consisted in the production of ceramic seeds with holmium-165 by sol-gel route. Chemical and physical characterizations of the seeds were performed. Subsequently, nuclear characterization was performed by gamma spectrometry. Experimental and theoretic
Brazilian Archives of Biology and Technology. Publicado em: 2011-10
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12. Characterization of ceramic seeds with samarium-153 for use in brachytherapy
Ceramic seeds were synthesized by the sol-gel technique with Si:Sm:Ca. One sample was irradiated in the TRIGA nuclear reactor IPR-R1. After irradiation, the seeds were submitted to instrumental neutron activation analysis to determine the 153Sm concentration in weight. The same irradiated seed sample was submitted to gamma spectrometry analysis to determine
Materials Research. Publicado em: 25/02/2011