Electron spin resonance (ESR) studies of radicals in irradiated A and B-type carbonate-containing apatites

Schramm, D.U.; Rossi, Alexandre M.

doi:10.1016/s0969-8043(00)00046-4

Cited by 41 publications

(15 citation statements)

References 28 publications

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“…Considering the intensity of the peak in position of 25.9° with Miller indices of (002), it is obvious that an increase in implantation time (carbon increase), decreases the peak height and increases the peak width as shown in Figure 2. This result is in agreement with those reported in some references [11][12][13][14][15].…”

Section: Esr Measurementsupporting

confidence: 94%

Effect of CO2 Ion Doping on Characteristics of Nanostructure Hydroxyapatite

Noori¹,

Ziaie²

2016

J Nanomed Nanotechnol

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In this research work, carbonated hydroxyapatite samples with different carbonate contents were prepared using ion implantation method. Pure nano-structure hydroxyapatite samples were implanted by 80 keV CO 2 + ions during different times of 4, 8, 16, and 24 min using an ion implantation devise. The resulting materials were tested by X-ray diffraction, Fourier transform Infrared spectroscopy, and transmission electron microscopy, electron spin resonance systems before and after the implantation. The results confirmed the doping of carbonate group into the hydroxyapatite structure, and show that the presence of carbonate in the structure of hydroxyapatite decreases the degree of crystallinity. Moreover, it was observed that the increasing of ion implantation time caused to decrease the average grain size of the hydroxyapatite sample.

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Section: Esr Measurementsupporting

confidence: 94%

Effect of CO2 Ion Doping on Characteristics of Nanostructure Hydroxyapatite

Noori¹,

Ziaie²

2016

J Nanomed Nanotechnol

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“…1 shows the ESR spectra of a chicken bone sample before (a) and after irradiation at 5 kGy (b). In the ESR spectrum of the unirradiated sample, only the symmetric shape assigned to an organic radical derived from collagen (Wieser et al, 1994;Polat et al, 1997) is present, whereas the irradiated sample shows the typical ESR signal shape, due to the CO 2 À radical in the hydroxyapatite of bone, as well as the collagen signal (Schramm and Rossi, 2000).…”

Section: Esr Measurementsmentioning

confidence: 98%

Application of the ESR spectroscopy to estimate the original dose in irradiated chicken bone

Parlato

Calderaro

Bartolotta

et al. 2007

Radiation Physics and Chemistry

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“…Observed spectra were decomposed in terms of five theoretical curves representing Oradical, two CO 3-radicals (surface and bulk) and two CO 2− radicals (surface and bulk). These species were also described in A-type and B-type carbonate-apatites [87], [88], tooth enamel [89], [90], [91], [92], [93] and bone [94], [95], apatites, renal stones [96], etc.…”

Section: Electron Paramagnetic Resonancementioning

confidence: 99%

Identification, Characterization and Properties of Apatites

Ptáček¹

2016

Apatites and Their Synthetic Analogues - Synthesis, Structure, Properties and Applications

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The parameters of unit cell, structure, refractive index, solubility data, PO 4 /CO 3 ratio, surface area, etc., are important parameters for characterization of phosphate rocks. Third chapter of this book introduces methods for identification, characterization and properties of apatites in four main sections. The first part describes techniques used for identification and investigation of properties of phosphate minerals, including X-ray diffraction analysis, powder neutron diffraction, X-ray fluorescence as well as spectroscopic and microscopic methods. Some of these techniques are then demonstrated on the fluorapatite specimen in the second part. The third part of this chapter deals with thermodynamic properties of apatite-type compounds and introduces some of thermodynamic predictive methods. The fourth part is dedicated to dissolution of apatite, where the reaction between solids and liquids according to different dissolution models is described. Chapter ends with methods for the evaluation of reactivity of phosphate rocks.

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Electron spin resonance (ESR) studies of radicals in irradiated A and B-type carbonate-containing apatites

Cited by 41 publications

References 28 publications

Effect of CO2 Ion Doping on Characteristics of Nanostructure Hydroxyapatite

Effect of CO2 Ion Doping on Characteristics of Nanostructure Hydroxyapatite

Application of the ESR spectroscopy to estimate the original dose in irradiated chicken bone

Identification, Characterization and Properties of Apatites

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