Effectiveness of Electron Beam Microbial Decontamination and Change of Essential Oil Components in Fennel

Yamaoki, Rumi; Kimura, Shojiro; Ohtsu, Naomi; Chikuta, Yasuhiro; Aoki, Kenji; Mino, Yoshiki; Ohta, Masatoshi

doi:10.3769/radioisotopes.57.367

Cited by 2 publications

(2 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is also used as a spice. Thus, irradiation to kill bacteria shows promise for treatment to improve the hygienic quality of Foeniculi fructus because it causes no loss or change of the essential oil components [6]. In the present study, organic free radicals in Foeniculi fructus before and after EB irradiation were analyzed by ESR spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Detection of organic free radicals in irradiated Foeniculi fructus by electron spin resonance spectroscopy

et al. 2008

Self Cite

View full text Add to dashboard Cite

Foeniculi fructus were irradiated with an electron beam and organic free radicals were detected by electron spin resonance (ESR) spectroscopy for the purpose of identifying radio-disinfected and sterilized herbal drugs. An ESR single-line spectrum near g = 2.005 was observed in the sample before irradiation. After irradiation, the intensity of the signal near g = 2.005 increased. In addition, two subsignals derived from cellulose radicals were observed approximately 3 mT to either side of the main signal, at g = 2.023 and g = 1.987. The intensity of the subsignal at g = 2.023 was proportional to the absorbed dose of radiation. The decrease in intensity of the signals was considerable 2 weeks after irradiation, and continued to decrease steadily thereafter. Among the signals, the fading of the subsignal at g = 2.023 was relatively small. The intensity of the subsignal at g = 2.023 was detectable for over 1 year in the sample that had been irradiated to the level of disinfection and sterilization. Therefore, organic free radicals in irradiated Foeniculi fructus can be measured rapidly and with high sensitivity by ESR spectroscopy. The stable signal at g = 2.023 is a promising indicator of the detection of irradiated herbal drugs.

show abstract

Section: Introductionmentioning

confidence: 99%

Detection of organic free radicals in irradiated Foeniculi fructus by electron spin resonance spectroscopy

et al. 2008

Self Cite

View full text Add to dashboard Cite

show abstract

“…The amount of extracts after 10 kGy or 30 kGy irradiation was 1.08 or 1.09 times greater (8% or 9% increase) than the level from the non‐irradiated sample (relative standard deviation (RSD), 2.2% average). A small increase in extraction efficiency for essential oil components was also observed in EB‐irradiated black pepper and fennel (Yamaoki et al, ). Probably, the increase in the amount of extracts results from degradation of the cell membrane by irradiation.…”

Section: Resultsmentioning

confidence: 83%

Effectiveness of electron beam irradiation for microbial decontamination of turmeric powder (Curcuma longaLinne) and analysis of curcuminoid degradation

Yamaoki

Kimura

2017

J Food Process Preserv

Self Cite

View full text Add to dashboard Cite

The effectiveness of electron beam (EB) disinfection and sterilization technology when applied to turmeric powder (Curcuma longa Linne) was investigated. The bacteria in turmeric powder were sensitive to EB irradiation. From an initial turmeric aerobic bacterial count of 10 7 colony-forming units per gram (cfu/g), a microbial contamination level of below 1.0 3 10 3 cfu/g was obtained atan absorbed dose of more than 7 kGy EB irradiation. EB irradiation at 10 kGy gave a contamination level of less than 10 cfu/g after 1 year of storage at room temperature. At the irradiation level necessary for decontamination of turmeric powder, the amount of dilute ethanol-soluble extract from the sample was 9% greater than the level from a non-irradiated turmeric powder. HPLC analysis of an irradiated sample indicated that EB radiolysis of curcuminoids was less than the level detectable by instrumental analysis. Practical applicationsRadiosterilization has been recognized as an effective method for controlling microorganisms and for extending the shelf life of food. In particular, EB irradiation is economically advantageous over gamma irradiation because of the higher EB dose rate. This study evaluates the use of 4.8 MeV EB radiation for the decontamination of turmeric powder for food additive and pharmaceutical uses. This method is found to be effective for sterilization and avoiding degradation of the yellow pigment components.

show abstract

Effectiveness of Electron Beam Microbial Decontamination and Change of Essential Oil Components in Fennel

Abstract: Foeniculum vulgare

Cited by 2 publications

References 10 publications

Detection of organic free radicals in irradiated Foeniculi fructus by electron spin resonance spectroscopy

Detection of organic free radicals in irradiated Foeniculi fructus by electron spin resonance spectroscopy

Effectiveness of electron beam irradiation for microbial decontamination of turmeric powder (Curcuma longaLinne) and analysis of curcuminoid degradation

Contact Info

Product

Resources

About