Radiation For Electron Beam
Mostrando 1-12 de 37 artigos, teses e dissertações.
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1. 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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2. Surgical management for large chest keloids with internal mammary artery perforator flap
Abstract Therapy for large symptomatic keloids is often plagued with complicated reconstruction manner and recurrence. This article reports a rare treatment combination for a chest keloid with internal mammary artery perforator flap reconstruction and radiation therapy. We excised the keloid and covered the defect with an internal mammary artery perforator f
An. Bras. Dermatol.. Publicado em: 2016-02
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3. Effects of preoperative irradiation using fractioned electron beam on the healing process of colocolonic anastomosis in rats undergoing early and late surgical intervention
PURPOSE: To investigate the effects of preoperative fractioned irradiation using an electron beam on the healing process of colocolonic anastomoses in rats that underwent early and late surgical intervention. METHODS: Thirty Wistar rats, distributed as follows: group A (surgery only), group B (fractionated irradiation for 30 days (if), surgery seven days aft
Acta Cir. Bras.. Publicado em: 2013-01
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4. Avaliação dos efeitos da radiação por feixe de elétrons na resistência de embalagens a Lasioderma serricorne, Plodia interpunctella e Sitophilus zeamais / Radiation effects evaluation for electrons sheaf in packages resistance in a Lasioderma serricorne, Plodia interpunctella and Sitophilus zeamais
As pragas de produtos armazenados constituem um problema para o homem, depreciando produtos e causando prejuízos econômicos. Dentre estas pragas temos o Lasioderma serricorne (F. 1792), Sitophilus zeamais (M. 1855) e Plodia interpunctella (H. 1813) conhecidos por infestar produtos armazenados como: grãos, farelos, farinhas, café, fumo, frutas secas e esp
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/08/2011
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5. Bremsstrahlung de elétrons no microtron do IFUSP: medidas, simulação e proposta de aplicação ao estudo da ressonância fluorescente nuclear / Electron Bremssthahlung in the IFUSP microton: measurements, simulation and proposal for a nuclear resonance fluorescence observation setup
The results of the first experiments carried out in the new electron accelerator of the Linear Accelerator Laboratory (LAL) of the Physics Institute of Universidade de São Paulo are reported here. A 1.9 MeV beam line, which allows the use of the injector beam for experimental physics, was added to the original accelerator design. Electron bremsstrahlung spe
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/06/2011
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6. Efeito da irradiação por feixe de elétrons sobre as propriedades físicas e químicas de uma resina de polipropileno. / Effect of electron beam irradiation by on the physical and chemical properties of a resin polypropylene.
A polypropylene resin was modified in the present work by submitting standard tensile specimens to electron beam irradiation, with doses corresponding to 20, 40, 60, 100, 200 and 300kGy. The effect of this irradiation upon the polymer\ s chemical and physical properties was investigated, in particular seeking a possible correlation between these properties a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/03/2011
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7. Coherent and incoherent radiation from free-electron lasers with an axial guide field
The spontaneous and induced emission from a free-electron laser is treated for the case in which an axial magnetic field is imposed in addition to the helical, axially periodic wiggler magnetic field. The classes of possible single-particle trajectories in this configuration are discussed, and the results are applied to a calculation of the incoherent radiat
Publicado em: 2011
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8. Projeto e construção de placas espalhadoras e degradadoras de energia para uso em radioterapia com feixes de elétrons para doenças de pele / Project and construction of energy degrading and scattering plates for electron beam radiotherapy for skin diseases
There are many radiosensitive epidermotropics diseases such as mycosis fungoids and the syndrome of Sézary, coetaneous neoplasics originated from type T lymphocytes. Several studies indicate the eradication of the disease when treated with linear accelerators emitting electron beams with energies between 4 to 10 MeV. However, this treatment technique presen
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/06/2010
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9. Medidas de velocidade de arrastamento de elétrons no isobutano puro / Measurements of electron drift velocity in pure isobutane
The electron drift velocity characterizes the electric conductivity of weakly ionized gases and is one of the most important transport parameters for simulation and modelling of radiation detectors and plasma discharges. This work presents the results of electron drift velocity as a function of the reduced electric field obtained in pure nitrogen and pure is
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/03/2010
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10. Gelatin/piassava composites treated by electron beam radiation
Piassava (Attalea funifera Mart) fiber has been investigated as reinforcement for polymer composites with potential for practical applications. The purpose of the present work was to assess the behavior of specimens of piassava fiber and gelatin irradiated with electron beam at different doses and percentage. The piassava/gelatin specimens were made with 5 a
Matéria (Rio de Janeiro). Publicado em: 2010
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11. Effect of electron beam irradiation on mechanical properties of gelatin/Brazil nut shell fiber composites
The use of natural fiber as polymeric matrix reinforcement has attracted interest, as fibers are renewable, of low cost, biodegradable and possesses non-toxic properties. In the present paper, Brazil nuts (Bertholletia excelsa) shell fiber (10% w/w) were mixed with gelatin (25% w/w), glycerin as plasticizer and acrylamide as copolymer to investigate the resu
Matéria (Rio de Janeiro). Publicado em: 2010
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12. STUDY OF HERBICIDE AMETRYNE DEGRADATION IN HDPE PACKAGING USING THE ADVANCED OXIDATION PROCESS BY IONIZING RADIATION / Processo de oxidação avançada por radiação ionizante na degradação do herbicida Ametrina em embalagens de pead descartadas
This study is part of the project with the objective to evaluate pesticides degradation for decontamination of commercial polymeric packaging of highdensity polyethylene, HDPE, used in agriculture. The herbicide used to this study was the herbicide ametryne (commercial name, Gesapax 500), due to its great use, mainly on field crops and on corn. Ametryne is c
Publicado em: 2008