Radiation Doses
Mostrando 13-24 de 572 artigos, teses e dissertações.
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13. Panicum maximum cv. Aries Establishment under Weed Interference with Levels of Light Interception and Nitrogen Fertilization
RESUMO: O objetivo deste trabalho foi avaliar o estabelecimento da pastagem de Panicum maximum cv. Áries em área de proteção ambiental sob influência de níveis variados de interação interespecífica exercidos pela comunidade de plantas daninhas. O experimento foi executado após semeadura da forrageira, delineado em blocos casualizados, no esquema fa
Planta daninha. Publicado em: 18/02/2019
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14. RADIATION EXPOSURE DURING SPINE SURGERY USING C-ARM FLUOROSCOPY
RESUMO Objetivo: Avaliar a dose de radiação recebida pela equipe cirúrgica em cirurgias de coluna, incluindo entre aqueles que não são considerados trabalhadores com exposição ocupacional. Método: Todas as cirurgias de coluna realizadas num mesmo departamento num período de 12 meses foram avaliadas quanto à exposição dos cirurgiões, enfermeiro
Acta ortop. bras.. Publicado em: 2019-02
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15. Influence of Ionizing Radiation on Biodegradable Foam Trays for Food Packaging Obtained from Irradiated Cassava Starch
ABSTRACT Biodegradable polymers, such as starch, cellulose, and derivatives thereof, are being studied to produce innovative packaging in the most diverse shapes (films, bags, trays, bottles, etc.) to attend this current market trend. The aim of this work was to produce foam trays from cassava starch for food packaging via extrusion followed by thermoforming
Braz. arch. biol. technol.. Publicado em: 29/10/2018
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16. Glass Ionomer Cements can be used for Bonding Orthodontic Brackets After Cancer Radiation Treatment?
Resumo Pacientes submetidos a tratamento radioterápico apresentam maior suscetibilidade à cárie dentária e o uso de aparelho aumenta esse fator de risco devido ao acúmulo de biofilme dental ao redor dos bráquetes. Assim, o objetivo deste estudo foi avaliar a resistência ao cisalhamento de bráquetes ortodônticos colados com cimento de ionômero de vi
Braz. Dent. J.. Publicado em: 2018-03
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17. Absorbed doses in salivary and thyroid glands from panoramic radiography and cone beam computed tomography
Abstract Introduction: Panoramic radiography and cone beam computed tomography (CBCT) are very important in the diagnosis of oral diseases, however patients are exposed to the risk of ionizing radiation. This paper describes our study aimed at comparing absorbed doses in the salivary glands and thyroid due to panoramic radiography and CBCT and estimating ra
Res. Biomed. Eng.. Publicado em: 15/02/2018
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18. Effect of Electron Beam and Gamma Rays on Carbon Nanotube Yarn Structure
Individual carbon nanotubes (CNTs) exhibit excellent mechanical, electrical and thermal properties, leading to development of a new generation of advanced lightweight materials and spacecraft electronics substituting the electronics based on silicon. The direct assembly of CNTs into macroscopic fibers or sheets has been a way to overcome their dispersion and
Mat. Res.. Publicado em: 18/09/2017
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19. Quality of Life after post-prostatectomy intensity modulated radiation therapy to the prostate bed with or without the use of gold fiducial markers for image guidance or higher total radiotherapy doses
ABSTRACT Purpose To evaluate quality of life (QoL) after post-prostatectomy intensity modulated radiation therapy (IMRT) in the “adjuvant” setting starting within 4 months of radical prostatectomy for adverse features; and “salvage” setting for a PSA≥0.2ng/mL. Materials and Methods Retrospective review of 130 patients who underwent IMRT to the
Int. braz j urol.. Publicado em: 2017-08
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20. Morphophysiological and biochemical alterations in Ricinus communis L. seeds submitted to cobalt60 gamma radiation
ABSTRACT This study aimed to evaluate the radiosensitivity of castor bean seeds after applications of different doses of Cobalt60 gamma radiation. Seeds were pre-soaked for 24 hours in distilled water and then irradiated with 50, 100, 150, and 200 Gy, except the control. Sowing was performed in trays, which contained soil as substrate and were maintained in
An. Acad. Bras. Ciênc.. Publicado em: 31/07/2017
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21. Automated and observer based light field indicator edge evaluation in diagnostic X-ray equipment
Abstract Introduction To analyze edge detection and optical contrast calculation of light field-indicators used in X-ray via automated- and observer-based methods, and comparison with current standard approaches, which do not give exact definition for light field edge determination. Methods Automated light sensor array was used to measure the penumbra zone
Res. Biomed. Eng.. Publicado em: 2017-06
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22. Radiation Exposure in Endovascular Infra-Renal Aortic Aneurysm Repair and Factors that Influence It
Abstract Objective: The endovascular repair of aortic abdominal aneurysms exposes the patients and surgical team to ionizing radiation with risk of direct tissue damage and induction of gene mutation. This study aims to describe our standard of radiation exposure in endovascular aortic aneurysm repair and the factors that influence it. Methods: Retrospecti
Braz. J. Cardiovasc. Surg.. Publicado em: 2016-12
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23. Comparative analysis of different doses of coherent light (laser) and non-coherent light (light-emitting diode) on cellular necrosis and apoptosis: a study in vitro
Introduction Threshold doses of electromagnetic radiation can initiate necrosis and apoptosis in cells. The purpose of this study was to evaluate cellular apoptosis and necrosis immediately (t0) and 24 hours (t24) after irradiation with different doses of coherent light (laser) or non-coherent light (LED). Methods CHO-K1 lineage cells were irradiated with
Res. Biomed. Eng.. Publicado em: 2016-12
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24. Irradiação incidental da cadeia mamária interna no câncer de mama: comparação entre a técnica convencional (bidimensional) e a técnica tridimensional
Resumo Objetivo: Avaliar a irradiação incidental dos linfonodos da cadeia mamária interna (LCMIs) com campos tangenciais opostos por meio de radioterapia bidimensional (2D) convencional ou tridimensional (3D) e comparar as duas técnicas quanto aos resultados obtidos. Materiais e Métodos: Trata-se de um estudo retrospectivo com 80 pacientes com câncer
Radiol Bras. Publicado em: 2016-06