Radioactive Tracer
Mostrando 1-12 de 65 artigos, teses e dissertações.
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1. Phosphorus utilization in broilers fed with diets supplemented with different feed ingredients
ABSTRACT: A reliable determination of endogenous phosphorus (P) excretion is required to measure P utilization in chickens accurately. The objective of this study was to investigate phosphorus (P) retention in broilers fed diets formulated with different feed ingredients. Sixty-four 15-d old broiler chicks were fed diets in which part of the dietary P was pr
Sci. agric. (Piracicaba, Braz.). Publicado em: 2019-02
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2. Cádmio na cadeia alimentar: proveniente de vegetais e avaliação da sua disponibilidade no solo com auxílio do 109Cd / Cadmium in food chain: derived from vegetables and evaluation of its availability in soil with the aid of 109Cd
A contaminação do ambiente é crescente no mundo, com grandes extensões de áreas afetadas por metais pesados em concentrações que podem representar perigo ambiental. Em face ao aumento da atividade industrial e à agricultura altamente tecnificada, é fundamental o monitoramento dos níveis de metais pesados nos solos, já que as plantas se comportam c
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/06/2011
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3. Desenvolvimento de sonda gama para cirurgia radioguiada
The use of intraoperative methods for guiding surgeries is increasing and is a promising method for improving the effectiveness of the surgical treatment of cancer. The procedure begins before surgery with the administration of a tumor-avid pharmaceutical that, usually, is labeled with a g-ray emitting radionuclide. During the subsequent surgical procedure,
Publicado em: 2008
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4. The isolated gamma probe technique for sentinel node penile carcinoma detection is unreliable
PURPOSE: Penile carcinoma is a common disease in northeast Brazil. This paper shows the results of the use of isolated gamma probe and discusses the incidence of false negative rates. MATERIALS AND METHODS: From July 2000 to September 2003, 27 newly diagnosed penile carcinoma patients (T1, T2, N0) were included in this prospective study. The isolated gamma p
International braz j urol. Publicado em: 2007-02
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5. Standardization of Ca-45 radioactive solution by tracing method
The procedure followed by the Laboratório de Metrologia Nuclear (LMN) at the IPEN, in São Paulo, for the standardization of the 45Ca is described. The activity measurement was carried out in a 4pb-gamma coincidence system, by the tracing method. The radionuclide chosen as the beta-gamma emitting tracer nuclide was 60Co because of i
Brazilian Journal of Physics. Publicado em: 2004-09
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6. Diffusion of the 65Zn radiotracer in ZnO polycrystalline ceramics
Zinc self-diffusion coefficients were measured in polycrystalline ZnO of high density (>99% of the theoretical density) and of high purity (> 99.999%). The diffusion experiments were performed from 1006 to 1377 °C, in oxygen atmosphere, for times between 16 and 574 h. The diffusion profiles were established by means of Residual Activity Method using the 65Z
Materials Research. Publicado em: 2003-06
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7. Clinical and functional assessment of swallowing of older patients with or without complaints of dysphagia admitted to a care geriatric ward / "Avaliação estrutural e funcional da deglutição de idosos, com e sem queixas de disfagia, internados em uma enfermaria geriátrica"
Physiological mechanisms change during the aging process. Among the changes that occur naturally during this process, there are the problems of swallowing. Swallowing integrity not only warrants the maintenance of the patients nutritional status, but also protects the respiratory system against accidents like the aspiration of oropharyngeal contents. On th
Publicado em: 2003
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8. The Trouble with Diffusion
The phenomenological formalism, which yields Fick's Laws for diffusion in single phase multicomponent systems, is widely accepted as the basis for the mathematical description of diffusion. This paper focuses on problems associated with this formalism. This mode of description of the process is cumbersome, defining as it does matrices of interdiffusion coeff
Materials Research. Publicado em: 2002-09
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9. Efetividade das bentonitas na retenção de césio em produtos de rejeitos cimentados
The nuclear energy has been used for the human development in different areas, as in the medicine, in the agriculture, in the industry and in the environmental protection, besides the electricity generation. As in other activities, in the use of nuclear energy, residues are also generated. They are considered radioactive wastes when the contaminant content c
Publicado em: 2001
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10. Avaliação de componentes minoritarios de oleos vegetais nos processos tecnologicos
We report the effects of individual steps of industrial and laboratorial refining on the alteration of selected minor constituents of oils, such as com, soybean and rapeseed oils such as sterols, steradienes, steryl ester, tocopherols and tocotrienols, polymeric glycerides, trans fatty acids. Total sterols, determined by capillary GC, decreased by 18 to 36%
Publicado em: 1997
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11. RADIOACTIVE SULFUR TRACER STUDIES ON THE REPRODUCTION OF T4 BACTERIOPHAGE1
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12. A NEW INSTRUMENT FOR OBTAINING INDICATOR DILUTION CURVES USING A RADIOACTIVE TRACER, I125