Showing papers in "Radiation Physics and Chemistry in 2012"

TL;DR: The attenuation coefficients of barium-bismuth-borosilicate glasses have been measured for gammaray photon energies of 662, 1173 and 1332 keV using a narrow beam transmission geometry as discussed by the authors.

TL;DR: In this paper, a series of antibacterial hydrogels were fabricated from an aqueous solution of AgNO3, gelatin and carboxymethyl chitosan by radiation-induced reduction and crosslinking at ambient temperature.

TL;DR: In this paper, the carbon ion beam induced modifications on optical, structural and chemical properties of polyallyl diglycol carbonate (PADC) commercially named as CR-39 and polyethyleneterepthalate (PET) polymer films were then irradiated by 55 MeV C 5+ ion beam at various fluences ranging from 1×10 11 to 1× 10 13 ions/cm 2.

TL;DR: In this paper, the authors used FTIR spectroscopy to study poly(ethylene oxide), PEO, irradiated in solid and molten aggregate states and as aqueous solutions of various concentrations.

TL;DR: In this paper, the effect of 1.25 MeV gamma radiation on the structural and optical properties of virgin and gamma irradiated polyethyleneterephthalate (PET) polymer samples are analyzed using powder X-ray diffractometer and UV-vis spectrophotometer.

TL;DR: In this article, the effect of different experimental parameters, such as concentration of reactant, molecular weight of PVP on nanoparticle formation was studied, and it was shown that spherical Au nps were formed when PVP of molecular weight 360,000 Da was used as capping agent.

TL;DR: In this article, the properties of chitosan-starch blend films were studied using casting and their mechanical properties were compared with those of pure chitosa starch films.

TL;DR: A pilot scale e-beam plant with an electron accelerator of 1MeV, 40kW was constructed at Daegu Dyeing Industrial Complex (DDIC) in 1997 for treating 1,000m 3 per day.

TL;DR: Efforts to develop additional generic PI treatments and reduce the dose for the 400 Gy treatment are ongoing with a broad based 5-year, 12-nation cooperative research project coordinated by the joint Food and Agricultural Organization/International Atomic Energy Agency Program on Nuclear Techniques in Food and Agriculture.

TL;DR: In this paper, the authors used the Exploranium GR-135 Plus (Identifier) radioisotope identification device and high-resolution High Purity Germanium (HPGe) detector system to assess the radiological hazard of radioactivity present in soil and sand samples obtained from Penang, Malaysia.

TL;DR: In this paper, the authors investigated the efficacy of gamma radiation for decontaminating ochratoxin A (OTA) and aflatoxins B1 (AFB1), B2(AFB2), G1(AFG1) and G2 (AFG2) residues in artificially contaminated black and white pepper samples.

TL;DR: In this article, the hydrophilic PVDF-g-PVP powder was used as additive to prepare a series of PVDF/PVDF-pVDFg-pVP blend porous membranes via an immersion precipitation phase inversion process.

TL;DR: In this article, the rate constants of the reactions of these pharmaceuticals with hydroxyl radicals were estimated by the competition reaction method to be 4.0-10×109−mol−1−dm3 s−1.

TL;DR: In this article, the thermoluminescence (TL) of non-doped and Ag, Cu− and Mndoped lithium-tetraborate (LTB) single crystals revealed that TL emission bands for differently doped samples proved to be at different wavelengths: 272, 370 and 608 nm, respectively.

TL;DR: In this paper, the effect of the γ-irradiation exposure by 100-500kGy doses on the optical properties and single oscillator parameters for chalcogenide glasses Se 70 S 30− x Sb x ( x = 0, 12, 18 and 30 ǫ at%) thin films were modeled from transmission spectra data measured by spectrophotometry.

TL;DR: In this article, the γ-radiolytic degradation of chloramphenicol (CPL) was investigated in 0.1-1.1mmol−dm−3 aqueous solutions at various radiation conditions.

TL;DR: A solution with a specific ratio of 2:1 of water-isopropanol was prepared and mixed with palladium chloride and the surfactant sodium dodecyl sulfate (SDS) as mentioned in this paper.

TL;DR: In this article, the concentrations of natural radionuclides in the sediments of Ogun river in South Western Nigeria have been measured and determined using gamma-ray spectrometry.

TL;DR: In this paper, a hybrid organic-inorganic proton conducting compound (HPA) of different concentrations into polyvinyl alcohol (PVA) was manufactured and the unirradiated and irradiated compounds were characterized by XRD and DSC.

TL;DR: In this article, the physical and chemical properties of a hydroxyapatite produced by the sintering of bovine bone were investigated by powder x-ray diffraction (PXRD), electron spin resonance (ESR), energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), Fourier transform infrared (FTIR), and differential thermal analysis (DTA).

TL;DR: In this article, principal component analysis (PCA) has been used to have an idea of the minerals present, in qualitative manner, in the soil under study, in order to identify the major soil forming compounds and to find out the fate of minor and trace elements.

TL;DR: In this article, the effects of high energy electron beam irradiation (10−MeV) on low density polyethylene (LDPE) material were thoroughly examined. And the results demonstrated an occurrence of oxidative degradation due to the formation of carbonyl groups at 1718 cm −1.

TL;DR: In this paper, the concentration of natural radionuclides in the granite rocks of selected quarry sites in Johor state, Malaysia and their possible radiological effects were determined. And the radium equivalent activity concentration was found in the range between 94 and 239 ǫ kg −1, the absorbed dose rate was found to be in the ranges between 47 and 112 nGy h −1.

TL;DR: The effect of electron beam irradiation on the blends of linear low-density polyethylene (LLDPE) and poly dimethyl siloxane rubber (PDMS) prepared over a wide range of compositions starting from 70:30 to 30:70 by varying the radiation doses from 50 to 300kGy has been studied.

TL;DR: In this article, a cellulose microsphere (CMS) adsorbent was prepared by radiation-induced grafting of dimethylaminoethyl methacrylate (DMAEMA) onto CMS followed by a protonation process.

TL;DR: In this article, the natural radioactivity of soils at Yelagiri hills has been studied in order to evaluate the radiological hazard, the radium equivalent activity Raeq, the absorbed dose rate DR, the annual effective dose rate and the external hazard index (Hex) have been calculated and compared with the internationally approved values.

TL;DR: In this article, the sterilization effects of radiation and its effect on the mechanical properties of Korean traditional paper was investigated and the results confirmed that radiation treatment disinfects the Korean traditional papers efficiently without changing its properties and that this treatment could be used to prevent damage of Korean ancient archives by molds and fungi.

TL;DR: In this article, the authors used poly(N -vinyl-2-pyrrolidone) (PVP) as a capping agent in the radiolytic synthesis of Ag/PVP nanosystems.

TL;DR: In this paper, the combined effect of gamma irradiation (1, 3 and 5 kGy) and storage at two temperatures: refrigeration (+4 ÂC) and frozen (−18 ÃÂC), on the shelf-life extension of fresh shrimp meat was investigated.

TL;DR: In this paper, the effects of irradiation on microbial decontamination, amylase activity, fermentability (using an amylolytic L. plantarum MNC 21 strain), starch granule structure and viscosity were determined.