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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Synthesis and characterization of phosphate glass microspheres for radiotherapy applications

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Autor(es):
Sene, Frank F. [1] ; Martinelli, Jose R. [1] ; Okuno, Emico [2]
Número total de Autores: 3
Afiliação do(s) autor(es):
[1] IPEN CNEN SP, CCTM, Nucl & Energy Res Inst, BR-05422970 Sao Paulo - Brazil
[2] Univ Sao Paulo, Inst Phys, BR-05508 Sao Paulo - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Journal of Non-Crystalline Solids; v. 354, n. 42-44, p. 4887-4893, NOV 1 2008.
Citações Web of Science: 22
Resumo

Class microspheres containing the radioisotope (32)P, a beta(-) particle emitter, and half-life of 14.3 days, can be easily introduced in specific human organs such as liver, pancreas. and uterus to kill cancer cells. In the present work phosphate glass microspheres were produced with different compositions and particle size distribution in the range of 20- 30 mu m. Two different thermal processes were used to spherodize glass particles originally with irregular shapes. Samples were characterized by X-rays diffraction to check the amorphous structure, energy dispersive X-rays fluorescence spectroscopy to determine the final glass composition, and Fourier transformed infrared spectroscopy to determine the structural groups in the glass structure. The dissolution rate of glass samples in water was determined at 90 degrees C, and in simulated body fluid (SBF) at 37 degrees C. Classes with dissolution rates close to 10(-5) g/(cm(2) day) were obtained, which make them suitable for the present application. Scanning electron microscopy was used to evaluate the shape of the microspheres before and after the dissolution tests. The cytotoxicity tests showed that these microspheres can be used for biological applications. (C) 2008 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 05/53241-9 - Estudo de fenômenos intergranulares em materiais cerâmicos
Beneficiário:Reginaldo Muccillo
Linha de fomento: Auxílio à Pesquisa - Temático