Comparison of gamma ray and electron beam irradiations on the degradation of carboxymethylcellulose

Abstract

Carboxymethylcellulose (CMC) is used for a variety of applications due to its superior properties of high viscosity at a low concentration. In this study, the difference between a gamma ray (GR) irradiation from Co-60 and an electron beam (EB) irradiation with 10 MeV Energy on the viscosity change in CMC solution was compared. At the same irradiation doses, the viscosity of the CMC solution was more severely decreased by GR. Electron spin resonance spectroscopy revealed that the radicals in the CMC were more generated by GR, but there was no difference in the Fourier transform infrared spectra of both irradiated CMC solutions. Also, the degree of substitution in CMC was not changed by both irradiation events. From these results, it can be concluded that EB irradiation could better minimize the decrease in the viscosity of the solution with CMC for the sterilization than GR.

Effect of radiation on chemical composition and protein quality of cottonseed meal

“…In the present study, GR irradiation caused a higher protein digestibility of CSM compared to that caused by EB irradiation. The higher digestibility of protein treated by GR can be due to a higher penetration of radicals in GR irradiation than in EB irradiation, while the absorbed doses in these two systems are the same (Choi et al 2009). Moreover, with modification in the secondary and tertiary structures of protein by GR irradiation, more peptide bonds are exposed to proteolytic enzymes (Fombang et al 2005).…”

“…Electron beam (EB) and GR irradiations have been known to show a similar effect on materials, but there are some differences regarding penetration and the method of their application (Choi et al . ). EB irradiation proven to be successful in decontamination, disinfestation and improvement of the overall quality of food and agricultural commodities (Palekar et al .…”

“…However, there are differences between them regarding their penetration and the method of use (Choi et al . ).…”

“…Advantages of irradiation include less damage to nutrients, especially proteins, nonformation of indigestible products, elimination of microbial and fungal contaminations from feed, and not having residual effects after irradiation (Shawrang 2006). Electron beam (EB) and GR irradiations have been known to show a similar effect on materials, but there are some differences regarding penetration and the method of their application (Choi et al 2009). EB irradiation proven to be successful in decontamination, disinfestation and improvement of the overall quality of food and agricultural commodities (Palekar et al 2004;.…”

“…However, chemical and biological effects caused by EB are similar to those caused by irradiation with gamma and X-rays, because photons of gamma and X-rays transfer their energy to absorbent materials by secondary electrons. However, there are differences between them regarding their penetration and the method of use (Choi et al 2009).…”