Radioisotope
Mostrando 1-12 de 173 artigos, teses e dissertações.
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1. American Space Nuclear Electric Systems
ABSTRACT: Since the 1960's the United States of America has launched several space missions using nuclear technology as a mean for propulsion and power supply. The majority of the American nuclear powered spacecrafts were based in radioisotope generators, with the exception of the SNAP-10A (1965), which was the only American reactor ever launched. However, s
J. Aerosp. Technol. Manag.. Publicado em: 01/11/2018
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2. 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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3. Novel immunoassay for TSH measurement in rats
ABSTRACT Measuring thyroid hormones is an important aspect for the study of metabolism and for monitoring diseases in both human and animal models. The traditional method for hormone measurement in rats is the radioimmunoassay (RIA). However, the RIA is associated with some practical disadvantages, including the use of radioactive material, the need for spec
Arch. Endocrinol. Metab.. Publicado em: 18/09/2017
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4. Phagocytic function of lower spleen pole and autogenous splenic implants in rats
PURPOSE: To investigate whether there are differences between the phagocytic function of the remaining lower spleen pole after subtotal splenectomy and autogenous splenic implants. METHODS: Thirty-six male Wistar rats, weighting 364 ± 60g were used. They were subjected to subtotal splenectomy preserving the lower spleen pole and to autogenous splenic impla
Acta Cir. Bras.. Publicado em: 2014-12
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5. Determination of the activity of standard anti-tuberculosis drugs against intramacrophage Mycobacterium tuberculosis, in vitro: MGIT 960 as a viable alternative for BACTEC 460
BACTEC 460 has now been phased out, so the search for an alternative is imperative. We have determined the activity of standard anti-tuberculosis drugs against intramacrophage Mycobacterium tuberculosis, in vitro, by using BACTEC 460 and MGIT 960 methods. The minimum inhibitory concentrations of isoniazid, rifampicin, ethambutol and streptomycin against intr
Braz J Infect Dis. Publicado em: 2014-06
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6. Estudo do campo de radiação neutrônica em torno do cíclotron GE PETtrace-8 de 16,5 MeV do CDTN / Study of the neutron radiation field around the GE-PETtrace-8 cyclotron do CDTN
Os radionuclídeos utilizados na tomografia por emissão de posítrons (PET) são produzidos utilizando um acelerador cíclotron. Os nêutrons produzidos durante a operação do cíclotron contribuem para exposição direta ou indireta dos Indivíduos Ocupacionalmente Expostos (IOEs), devido ao aumento da radiação de fundo da casamata. Além disso, há um
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/07/2012
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7. Avaliação da variabilidade espacial do fallout do \ ANTPOT.7Be\ / Evaluation of \ ANTPOT.7Be\ fallout spatial variability
O radioisótopo cosmogênico \ ANTPOT.7Be\ é produzido por interações de partículas cósmicas com átomos da atmosfera, e vem sendo usado como traçador em estudos de erosão do solo e de processos climáticos. Após a formação, o \ ANTPOT.7Be\ liga-se as partículas dos aerossóis presentes na atmosfera e é depositado na superfície terrestre com out
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/09/2011
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8. Desenvolvimento e implementação de um novo sistema pneumático de transferência para irradiação de materiais no reator IEA-R1 / Development and implementation of a new pneumatic transfer system for materials irradiation at IEA-R1 reactor
Pneumatic Transfer Systems (PTS) are classified as mechanical equipment largely operated all over the world for transport of a huge sort of objects, samples and materials located at nearly terminals or even at separated ones. System applicability is often recognized in many activities, such as medicine (hospital settings, clinical analysis labs), industry (s
Publicado em: 2011
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9. DIGITAL SIMULATION SYSTEM OF NEUTRON PARAMETERS OF THE TRIGA IPR-R1 NUCLEAR RESEARCH REACTOR / SISTEMA DIGITAL PARA SIMULAÇÃO DOS PARÂMETROS NEUTRÔNICOS DO REATOR NUCLEAR DE PESQUISA TRIGA IPR-1
The IPR-R1 TRIGA Mark I nuclear research reactor, at the Nuclear Technology Development Center (CDTN), is a pool type reactor cooling by light water. TRIGA reactors (Training, Research, Isotope, General Atomics) were designed for research, training and radioisotope production. The International Atomic Energy Agency (IAEA) recommends the use of safety and fri
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/07/2010
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10. Use of the plasma CTX for assessing the bone activity of the mandible among osteopenic and osteoporotic patients
The aim of this study was to determine whether the plasma CTX bone remodeling marker is useful for indicating the bone metabolic activity level of the mandible. Thirty-six patients were selected; all were postmenopausal and aged 50 years or over. In accordance with the WHO criteria for osteoporosis, a control group was set up (n = 10) in which the T-score wa
Brazilian Oral Research. Publicado em: 2010-06
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11. 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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12. 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