Papers by Jose S Rabelo Neto
Laser Physics, 2010
... 24, 693 (2004). 28. JP Lafon, E. Champion, D. Bernache Assolant, R. Gilbert, and AM Danna, J.... more ... 24, 693 (2004). 28. JP Lafon, E. Champion, D. Bernache Assolant, R. Gilbert, and AM Danna, J. Therm. Anal. Calorim. 72, 1127 (2003). 29. G. Muralithran and S. Ramesh, Ceram. Int. 26, 221 (2000). 30. QJ He, ZL Huang, XK Chenga, and J. Yua, Mater. Lett. 62, 538 (2008). 31. ...
Photonic Therapeutics and Diagnostics Vii, 2011
The use of laser for bone cutting can be more advantageous than the use of drill. However, for a ... more The use of laser for bone cutting can be more advantageous than the use of drill. However, for a safe clinical application, it is necessary to know the effects of laser irradiation on bone tissues. In this study, the Fourier Transform Infrared spectroscopy (FTIR) was used to verify the molecular and compositional changes promoted by laser irradiation on bone tissue. Bone slabs were obtained from rabbit's tibia and analyzed using ATR-FTIR. After the initial analysis, the samples were irradiated using a pulsed Er,Cr:YSGG laser (2780nm), and analyzed one more time. In order to verify changes due to laser irradiation, the area under phosphate (1300-900cm-1), amides (1680-1200cm-1), water (3600-2400cm-1), and carbonate (around 870cm-1 and between 1600-1300cm-1) bands were calculated, and normalized by phosphate band area (1300-900cm-1). It was observed that Er,Cr:YSGG irradiation promoted a significant decrease in the content of water and amides I and III at irradiated bone, evidencing that laser procedure caused an evaporation of the organic content and changed the collagen structure, suggesting that these changes may interfere with the healing process. In this way, these changes should be considered in a clinical application of laser irradiation in surgeries.
Atomic absorption methods of analysis are extensively used in the exploration, mining and process... more Atomic absorption methods of analysis are extensively used in the exploration, mining and processing of materials, In such work the most widely used technique involves prior solution of the sample before atomizing in a flame. Methods for the direct analysis of metals and alloys have recently been developed, the atomic vapour of the sample being produced by cathodic sputtering in a glow discharge. The sputtering techniques developed for this work have been applied to the construction of demountable atomic spectral lamps and demountable resonance detectors. It has recently been shown that a separated flame, of the type used in flame fluorescence spectroscopy, can serve as a resonance detector for several elements. By the use of flame-type and sputteringtype resonance detectors, in conjunction with demountable sputtering chambers, it appears possible to develop a generalpurpose atomic spectrometer capable of the analysis of solutions or solids by atomic absorption, atomic fluorescence, or atomic emi ssion spectroscopy,
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Papers by Jose S Rabelo Neto