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Cytogenetic analysis of the effects of 2.5 and 10.5 GHz microwaves on human lymphocytes Genet. Mol. Biol.
Figueiredo,André B.S.; Alves,Rex N.; Ramalho,Adriana T..
The biological effects of microwaves on living organisms remain highly controversial. Although some reports have suggested that microwaves may be directly or indirectly genotoxic, a direct action is unlikely because the low energy of microwave photons makes them unable to cause single-strand breaks in DNA. In this work, we examined the possible clastogenic properties of microwaves (2.5 and 10.5 GHz) on blood lymphocytes in vitro by monitoring the frequency of chromosomal aberrations. We also investigated whether blood cells showed increased radiosensitivity or radioresistance when pretreated with the microwaves and then irradiated with gamma radiation. There was no significant difference in the frequency of chromosomal aberrations between cells which had...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chromosomal aberrations; Human lymphocytes; Microwaves.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000300024
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A rapid alternative technique for obtaining silver-positive patterns in chromosomes Genet. Mol. Biol.
Kavalco,Karine Frehner; Pazza,Rubens.
Silver nitrate chromosome staining to evidence nucleolar organizer regions (NORs) is a widely adopted methodology. The aim of the present work was to improve this technique, reducing the preparation time without decreasing the quality of the results. Microwave irradiation proved to be quite efficient and reliable for this purpose, as it allowed to identify Ag-NORs equivalent to those obtained by the conventional procedure and also to reduce the concentration of the employed reagents, as well as the precipitation of debris on the preparation.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Silver staining; Ag-NOR; Microwaves; Chromosome banding.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000200012
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Decalcification Dynamic of Dog Mineralized Tissue by Microwaves International Journal of Morphology
Pitol,Dimitrius Leonardo; Issa,Joáo Paulo Mardegan; Caetano,Flávio Henrique; Lunardi,Laurelúcia Orive.
The aim of this article is to present the decalcification process dynamic of mineralized tissue in dogs, teeth and jaw, comparing the traditional decalcification method, immersion, and microwave, immersion followed by irradiation using a domestic microwave oven, accompanying the liberation of calcium through spectrophotometer of atomic absorption. It was used as decalcified agent, EDTA solution or nitric acid. The results showed that with the use of nitric acid (5%), after 15 days, the irradiated fragments could be processed for histological analysis, otherwise the tooth not irradiated need to be submerged for 65 days. The EDTA decalcified action was slower than the nitric acid. The histological observations of the irradiated samples showed an excellent...
Tipo: Journal article Palavras-chave: Dog; Mineralized tissue; Decalcification; Microwaves; Solution.
Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022007000200011
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