Irradiation dose control of chicken meat processing with alanine/ESR dosimetric system

Miyagusku, Luciana; Chen, F.; Kuaye, Arnaldo Yoshiteru; Castilho, C.J.C.; Baffa, Oswaldo

doi:10.1016/j.radmeas.2007.05.032

Cited by 12 publications

(5 citation statements)

References 9 publications

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“…Nowadays, the alanine/ESR technique is largely employed for dosimetry of high doses involved in procedures of food irradiation, medical product sterilization, and radiotherapy. − This technique can detect doses from gray up to kilogray and offers such advantages as time stability of the ESR signal and linearity . The stability of the radicals depends on the molecular surroundings, rigidity of the matter, temperature, and humidity .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Gold/Alanine Nanocomposites with Potential Properties for Medical Application as Radiation Sensors

Guidelli

Ramos

Zaniquelli

et al. 2012

ACS Appl. Mater. Interfaces

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Radiation dose assessment is essential for several medical treatments and diagnostic procedures. In this context, nanotechnology has been used in the development of improved radiation sensors, with higher sensitivity as well as smaller sizes and energy dependence. This paper deals with the synthesis and characterization of gold/alanine nanocomposites with varying mass percentage of gold, for application as radiation sensors. Alanine is an excellent stabilizing agent for gold nanoparticles because the size of the nanoparticles does not augment with increasing mass percentage of gold, as evidenced by UV-vis spectroscopy, dynamic light scattering, and transmission electron microscopy. X-ray diffraction patterns suggest that the alanine crystalline orientation undergoes alterations upon the addition of gold nanoparticles. Fourier transform infrared spectroscopy indicates that there is interaction between the gold nanoparticles and the amine group of the alanine molecules, which may be the reason for the enhanced stability of the nanocomposite. The application of the nanocomposites as radiation detectors was evaluated by the electron spin resonance technique. The sensitivity is improved almost 3 times in the case of the nanocomposite containing 3% (w/w) gold, so it can be easily tuned by changing the amount of gold nanoparticles in the nanocomposites, without the size of the nanoparticles influencing the radiation absorption. In conclusion, the featured properties, such as homogeneity, nanoparticle size stability, and enhanced sensitivity, make these nanocomposites potential candidates for the construction of small-sized radiation sensors with tunable sensitivity for application in several medical procedures.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Gold/Alanine Nanocomposites with Potential Properties for Medical Application as Radiation Sensors

Guidelli

Ramos

Zaniquelli

et al. 2012

ACS Appl. Mater. Interfaces

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show abstract

“…107 Larger radiation doses increase the probability of changes in sensorial characteristics of meat (odor of burned meat). 108 It was concluded that a dose of 3 kGy is adequate, taking into account the microbiological and sensorial aspects. 108 The aim of the study was to analyze volatile formation in cinnamon (Laurus cinnamomum) samples after -irradiation.…”

Section: Foodmentioning

confidence: 99%

“…108 It was concluded that a dose of 3 kGy is adequate, taking into account the microbiological and sensorial aspects. 108 The aim of the study was to analyze volatile formation in cinnamon (Laurus cinnamomum) samples after -irradiation. 109 The irradiation decreased volatile compounds by nearly 56% to 89.5% depending on radiation dose (10-25 kGy).…”

Section: Foodmentioning

confidence: 99%

Odor in Various Products

Wypych¹

2013

Handbook of Odors in Materials

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“…Alanine/ESR dosimetry has low fading, wide dose range, linear dose response and can be measured several times without loss of signal. It is a well-established dosimetric technique for high doses, from a few Gys to up to 10 3 Gys, in procedures as, medical products sterilization, food irradiation, and radiotherapy (Chen et al 2001, Miyagusku et al 2007. However, the sensitivity of the alanine dosimeter diminishes when exposed to doses lower than 1 Gy and for photons with energies below 100 keV (Regulla and Deffner 1982, Ikey et al 2000, Borgonove et al 2007, Marrale et al 2011.…”

Section: Introductionmentioning

confidence: 99%

Dose enhancement factor caused by gold nanoparticles: influence of the dosimetric sensitivity and radiation dose assessed by electron spin resonance dosimetry

Lima¹,

Guidelli²,

Baffa³

2021

Phys. Med. Biol.

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Gold nanoparticles have been extensively used to increase the sensitivity of radiation dosimeters. In this work, nanocomposites of alanine (Ala), 2-methylalanine (2MA), asparagine (Asn) and monosodium glutamate (MSG) containing gold nanoparticles were prepared. The influence of the mass percentage of gold (0.1% up to 3%), absorbed dose (2 Gy–10 kGy) and the intrinsic sensitivity of these materials on the dose enhancement factor (DEF) were investigated. The prepared nanocomposites were characterized by UV–vis absorption spectroscopy and dynamic light scattering technique. Electron spin resonance spectroscopy was employed to assess the dosimetric response. The results revealed that the gold nanoparticles aggregated in the nanocomposites of MSG and Asn but not in the Ala and 2MA samples. Higher DEFs were observed for materials with lower intrinsic sensitivities (Asn and MSG) and for lower doses of radiation, suggesting that the dosimetric response of the nanocomposite dosimeters is governed by the probability of radical recombination. The higher the radiation dose, gold mass percentage and/or intrinsic sensitivity of the dosimetric material, the higher the production of radiation-induced free-radicals, enhancing the probability of radical recombination and resulting in lower DEFs. These results bring new insights about the use of gold nanoparticles to the construction of more sensitive radiation dosimeters.

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Irradiation dose control of chicken meat processing with alanine/ESR dosimetric system

Cited by 12 publications

References 9 publications

Synthesis and Characterization of Gold/Alanine Nanocomposites with Potential Properties for Medical Application as Radiation Sensors

Synthesis and Characterization of Gold/Alanine Nanocomposites with Potential Properties for Medical Application as Radiation Sensors

Odor in Various Products

Dose enhancement factor caused by gold nanoparticles: influence of the dosimetric sensitivity and radiation dose assessed by electron spin resonance dosimetry

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