Electron spin resonance identification of irradiated ascorbic acid: Dosimetry and influence of powder fineness

Basly, Jean‐Philippe; Basly, I; Bernard, M.

doi:10.1016/s0003-2670(98)00319-5

Cited by 34 publications

(26 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The pattern of the spectrum with many maxima and minima was observed not to depend on the applied radiation dose, microwave power, and temperature in the ranges of the 0.5-25 kGy, 0.0016-10 mW, and 120-400 K, respectively. This spectrum is quite different from that reported in the literature [11] for the same compound. While the spectrum for SA given in ref.…”

Section: Room Temperature Resultscontrasting

confidence: 99%

“…Effects of gamma radiation on solid SA have already been reported in a previous work [11], but room and high-temperature kinetic features, structures of the radical species produced after irradiation and their spectroscopic parameters were not reported up to present days. Yet, the knowledge about the stabilities of the radical species is important for the discrimination of SA containing irradiated foods from unirradiated ones, radiosterilization of SA, and dose estimation.…”

Section: Introductionmentioning

confidence: 81%

See 1 more Smart Citation

Kinetics of the radiation-induced radical species in gamma irradiated solid sodium ascorbate

Tuner

Korkmaz

2008

Radiation Effects and Defects in Solids

View full text Add to dashboard Cite

In the present work, radicals induced in γ-irradiated solid sodium ascorbate (SA) were studied by electron spin resonance (ESR) spectroscopy. While unirradiated samples presented no ESR signal, irradiated samples were found to present a spectrum of an unresolved doublet with a shoulder at the low-magnetic field side. Structural and kinetic features of the radical species responsible for the experimental ESR spectrum were explored through the variations of the signal intensities associated with spectrum maxima and minima with applied microwave power, sample temperature, and room temperature storage time. Activation energies of the involved species were also determined using the data derived from annealing studies performed at high temperatures. Produced radical species were observed to be relatively stable at room temperature. This gave the opportunity to distinguish irradiated SA or SA containing irradiation products from unirradiated ones even long after irradiation. SA presented also the features of a dosimetric material, which could be used in the estimation of dose range in accidental dosimetry.

show abstract

Section: Room Temperature Resultscontrasting

confidence: 99%

Section: Introductionmentioning

confidence: 81%

Kinetics of the radiation-induced radical species in gamma irradiated solid sodium ascorbate

Tuner

Korkmaz

2008

Radiation Effects and Defects in Solids

View full text Add to dashboard Cite

show abstract

“…Linear, quadratic, power and exponential functions of the applied radiation dose were tested to describe experimental dose-response data without forcing the functions to pass through the origin. These functions have previously been mentioned for the estimation of the absorbed dose in radiationprocessed food [16][17][18] and in radiosterilization of pharmaceuticals [4,5,15,19]. Parameter values and correlation coefficients calculated for these functions are presented in table 4.…”

Section: Resultsmentioning

confidence: 99%

“…Sterilization of pharmaceutically active substances by ionizing radiations has steadily increased during the past two decades [1][2][3][4][5][6]. The advantages of sterilization by irradiation include high penetrating power, low chemical reactivity, low measurable residues, small temperature rise and fewer parameters to control [7].…”

Section: Introductionmentioning

confidence: 99%

Molecular damages produced by gamma radiation in solid piperacillin monohydrate: an ESR investigation

Tepe

Polat

Korkmaz

2007

Radiation Effects and Defects in Solids

View full text Add to dashboard Cite

In the present work, the results of an electron spin resonance (ESR) study carried out on gamma irradiated solid piperacillin monohydrate (PMH) were presented. While unirradiated PMH exhibited no ESR signal, irradiated PMH was found to have an unresolved broad resonance line of singlet appearance. Results related with the variations of peak heights with applied microwave power, sample temperature, storage time at room temperature and annealing time at high temperatures were used to determine the structural and kinetic features and activation energies of the contributing radicalic species. Two tentative radicalic species were proposed and their spectroscopic parameters were determined through spectrum simulation calculations. The dosimetric potential of PMH was also investigated and it was concluded that PMH does not present the characteristics of a good dosimetric material, but that ESR spectroscopy could be used in the discrimination of irradiated PMH from unirradiated one.

show abstract

“…For this purpose, the mathematical functions that best describe the dose-response curves should be determined, and linear, polynomial and exponential functions are frequently used (Dodd et al 1988;Desrosiers 1991Basly et al 1998;Polat and Korkmaz 2005;Tuner and Korkmaz 2009;Ustundag and Korkmaz 2009). Samples Signal intensity (a.u.…”

Section: Dose-response Curvesmentioning

confidence: 99%

Dosimetric and kinetic investigations of γ-irradiated sodium tartrate dihydrate

Tuner,

Kayıkçı

2011

Radiat Environ Biophys

View full text Add to dashboard Cite

Effects of gamma radiation on solid sodium tartrate dihydrate (NaTA) were studied using electron spin resonance (ESR) spectroscopy. One main singlet located at g = 2.0034 and many weak lines located at low and high magnetic field sides were found in the irradiated samples. Dosimetric and kinetic features of the radical species responsible for the experimental ESR spectra were explored through the variations in the signal intensities with respect to applied microwave power, temperature and storage time. Activation energies of the involved radical species were also determined using data derived from annealing studies.

show abstract

Electron spin resonance identification of irradiated ascorbic acid: Dosimetry and influence of powder fineness

Cited by 34 publications

References 11 publications

Kinetics of the radiation-induced radical species in gamma irradiated solid sodium ascorbate

Kinetics of the radiation-induced radical species in gamma irradiated solid sodium ascorbate

Molecular damages produced by gamma radiation in solid piperacillin monohydrate: an ESR investigation

Dosimetric and kinetic investigations of γ-irradiated sodium tartrate dihydrate

Contact Info

Product

Resources

About