Radioisotopes
Mostrando 1-12 de 101 artigos, teses e dissertações.
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1. Phosphorus acquisition by wheat from organic and inorganic sources labelled with 32P and 33P radioisotopes
ABSTRACT: Investment in soil phosphorus (P) capital in the tropics is often constrained by poor availability of mineral fertiliser to small-scale farmers. Consequently, new sustainable agricultural cropping strategies are required to maintain fertility and maximise crop yields. The co-application of Tithonia diversifolia (Tithonia) green manure and mineral f
Sci. agric. (Piracicaba, Braz.). Publicado em: 05/09/2019
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2. Biodistribution of meglumine antimoniate in healthy and Leishmania (Leishmania) infantum chagasi-infected BALB/c mice
Pentavalent antimonials such as meglumine antimoniate (MA) are the primary treatments for leishmaniasis, a complex disease caused by protozoan parasites of the genus Leishmania . Despite over 70 years of clinical use, their mechanisms of action, toxicity and pharmacokinetics have not been fully elucidated. Radiotracer studies performed on animals have the po
Mem. Inst. Oswaldo Cruz. Publicado em: 2013-08
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3. Estudo dos riscos apresentados pelos radioisótopos após serem submetidos aos efeitos da detonação de um artefato explosivo / Study of risks presented by radioisotopes be submitted after the effects of detonation an explosive device
O presente trabalho tratou do estudo dos riscos apresentados pelos radioisótopos após serem submetidos aos efeitos da detonação de um artefato explosivo. O estudo permitiu a obtenção de dados baseados em pesquisas bibliográficas, documentais, cálculos e softwares, possibilitando análises das consequências resultantes de artefatos explosivos contend
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/08/2012
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4. Assinatura da deposição atmosférica de testes nucleares em sedimentos da costa brasileira (240+239Pu e 137Cs)
The aim of this review is to take a look at Cold War era nuclear tests signatures found in Brazilian coastal sediments. Both137Cs and 240+239Pu signatures have been documented in mangrove, coastal mudflats and continental shelf sediments, associated with above ground nuclear tests beginning in the 1950's. The dates associated to the anthropogenic radionuclid
Química Nova. Publicado em: 2012
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5. Estimativa da difusividade de N2O no solo pela Lei de Fick utilizando os dados de fluxo e perfil de concentração de CO2 no solo.
Fluxo a partir da câmara estática fechada e amostragem de gases do perfil do solo; Estimativa da difusividade; Cálculo do fluxo e produção de N2O pela técnica de concentração no perfil do solo; Análises estatísticas. 0 objetivo do presente trabalho foi testar um novo método para avaliar a difusividade de gases do solo para estudos com N2O, baseado
Seropédica: Embrapa Agrobiologia. Publicado em: 2011
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6. Estudos de simulação computacional do processo de redução de UF4 a Urânio metálico / computational simulation studies of the reduction process of UF4 to metallic uranium
The production of metallic uranium is essential for production of fuel elements for using in nuclear reactors manufacturing of radioisotopes and radiopharmaceuticals. In IPEN, metallic uranium is produced by magnesiothermical reduction of UF4. This reaction is performed in a closed graphite crucible inserted in a sealed metal reactor and no contact with the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/12/2010
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7. Desenvolvimento e farmacocinética de antimônio encapsulado em lipossomas de fosfatidilserina utilizando radioisótopos em leishmaniose experimental / Development and pharmacokinetic of antimony encapsulated in liposomes of phosphatidylserine using radioisotopes in experimental leishmaniasis
Leishmaniases are a complex of parasitic diseases caused by intramacrophage protozoa of the genus Leishmania, and is fatal if left untreated. Pentavalent antimonials, though toxic and their mechanism of action being unclear, remain the first-line drugs for treatment. Effective therapy could be achieved by delivering antileishmanial drugs to these sites of in
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/03/2010
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8. UV dominant optical emission newly detected from radioisotopes and XRF sources
The current paper reports first and definite experimental evidence for γ-, X-, or β radiation causing UV dominant optical radiation from (1) radiochemicals such as 131I; (2) XRF sources such as Rb XRF source present as salts; and (3) metal sources such as 57Co, and Cu XRF sources. Due to low quantum yield a need arose to develop two techniques with narrow
Brazilian Journal of Physics. Publicado em: 2010-03
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9. Thermal and epithermal neutron fluence rates in the irradiation facilities of the TRIGA IPR-R1 nuclear reactor
The TRIGA IPR-R1 nuclear reactor at the Centro de Desenvolvimento da Tecnologia Nuclear CDTN/CNEN, Belo Horizonte, Brazil, has three irradiation facilities: a rotary specimen rack outside the reactor core with 40 irradiation channels which provide large scale isotope irradiation; the central tube placed at the center of the reactor core which permits sample
Brazilian Journal of Physics. Publicado em: 2010-03
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10. Resultados da associação de braquiterapia de alta taxa de dose à teleterapia no câncer da próstata / Results of the association of high dose-rate brachytherapy with external beam irradiation in prostate cancer
INTRODUCTION: high dose-rate brachytherapy (HDR) for prostate cancer may be a nice treatment option for dose escalation as a boost, when associated to external beam irradiation, mainly if 3D conformal or more advanced technology is not available. PURPOSE: this study analyzes the results and toxicities of HDR brachytherapy boost prior to external beam radioth
Publicado em: 2010
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11. Síntese, análise, purificação e biodistribuição em modelo animal do Radiofármaco 177Lu3+-dotatato para uso diagnóstico e terapêutico em tumores neuroendócrinos / SYNTHESIS, ANALYSIS, PURIFICATION AND BIODISTRIBUTION IN AN ANIMAL MODEL OF RADIOPHARMACEUTICAL 177Lu3+- DOTATATO FOR DIAGNOSTIC AND THERAPEUTIC USE IN NEUROENDOCRINE TUMORS
The aim of this work was to propose rationalization in the synthesis, analysis and purification of radiopharmaceutical 177Lu3+-DOTATATO for diagnostic and therapeutic use in neuroendocrine tumors, as well as for evaluating biodistribution of this radiopharmaceutical in an animal-model. The complexation reaction for the synthesis of radiopharmaceutical was ca
Publicado em: 2009
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12. Sterilization of fruit flies (Diptera: Tephritidae) with X-rays for Sterile Insect Technique Programs / Esterilização de moscas-das-frutas (Diptera: Tephritidae) com raios-X para Programas de Técnica do Inseto Estéril
Recent fear of acts of terrorism provoked an increase of delays and denials in the shipment of radioisotopes. This truly represented a menace to sterile insect production projects around the world. In order to validate the use of a new kind of low-energy X-ray irradiator, a series of radiobiological studies on Ceratitis capitata (tsl-VIENNA 8 strain) (Wied.,
Publicado em: 2009