Showing papers in "Radiation Physics and Chemistry in 2011"

TL;DR: In this article, the effect of various γ-irradiation doses (0, 5, 10, 15 and 20 G) on the enhancement of secondary metabolites production and antioxidant properties of rosemary callus culture was investigated.

TL;DR: The results showed that the mean activity of 226 Ra and 232 Th is lower than the world average of 25 ¼ Bq/kg for both of them, whereas the mean value for 40 K is about double the world standard of 370 ǫ bq/ kg as discussed by the authors, while the presence of 137 Cs in the analyzed samples is low in most locations.

TL;DR: In this paper, the gamma-ray spectrometer using HPGe detector with specially designed shield was used to detect radionuclides in rock and soil samples collected around Juban town in Yemen.

TL;DR: In this article, a review on the prepared TLD nanomaterials, studied for their TL response to HCP, is presented, where the important results obtained in these nanommaterials and the possibility of using them as HCP dosimeters are discussed.

TL;DR: In this article, the thermoluminescence (TL) and photoluminecence (PL) of zirconium oxide (ZrO2) nanoparticles synthesized using the propellant chemical combustion method were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM).

TL;DR: The role of the antioxidant in the polymer is the reduction of free radical formation in the initiation step in thermal oxidation, and it could not stop radical reactions for either radiation or thermal oxidation as mentioned in this paper.

TL;DR: In this paper, the effect of depolymerized form of sodium alginate, produced by irradiating the latter by 60 Co gamma rays, was studied on Artemisia annua L. with regard to growth attributes, physiological and biochemical parameters and artemisinin content.

TL;DR: In this article, radiolytic synthesis of silver nanoparticles (Ag NPs) within the polyvinyl-2-pyrrolidone (PVP) hydrogel was described.

TL;DR: In this article, an acrylic acid (AA) was facilely grafted onto poly(ethylene terephthalate) (PET) film through gamma-ray induced graft copolymerization.

TL;DR: In this article, the authors showed that oligochitosan with Mw from 5000 to 10,000 could be efficiently prepared by γ-irradiation of chitosin solution containing a small amount of hydrogen peroxide at low dose less than 10kGy.

TL;DR: In this article, a model for depth dose and lateral distributions based on Monte Carlo calculations (GEANT4) and an integration procedure of Bethe-Bloch equation (BBE) was developed.

TL;DR: In this paper, a pre-irradiation grafting (PIG) was used to obtain a more homogeneous fiber surface, while SG resulted in higher grafting yield but showed clear indications of some GMA-homopolymerization.

TL;DR: Hazelnut, walnut, almonds, and pistachio nuts were treated with 1, 3, 5, and 7 kGy of gamma irradiation, respectively, and the data obtained from the experiments indicated that gamma radiation did not cause any significant change in the oil content of nuts as mentioned in this paper.

TL;DR: In this article, three soybean genotypes Kalitur, Hara soya and NRC37 with black, green and yellow seed coat color, respectively, were gamma irradiated at 0.5, 2.0 and 5.0 kGy and tested for antinutritional and nutritional factors.

TL;DR: The G-P fitting method has been used to compute the exposure build-up factor of teeth for a wide energy range up to the penetration depth of 40 mean free paths and is useful to estimate the relative dose distribution in different regions of teeth.

TL;DR: In this article, the authors carried out a survey on the knowledge and acceptance level of food irradiation and found that 76.5% did not know that irradiation could be used as a method for food preservation; 46% expressed their belief that irradiated food means the same as radioactive food.

TL;DR: In this article, the authors present the findings of radiometric analysis carried out to determine the activity concentrations of natural radionuclides in raw materials (clay, kaolin, quartz, feldspar, dolomite, alumina, bauxite, zirconium minerals, red mud and frit) and end products (glazed ceramic wall and floor tiles) in the Turkish ceramics industry.

TL;DR: In this paper, the physicochemical properties of NR/SBR blends cured by electron beam irradiation and sulfur were compared and the results showed that the irradiated blends have better mechanical properties than those cured by the sulfur system.

TL;DR: Graft copolymerization of sodium styrene sulfonate (SSS) onto electron beam (EB) irradiated polyvinylidene fluoride (PVDF) films was investigated to find out a simple preparation process for sulfonic acid proton exchange membranes with respect to monomer concentration, absorbed dose, temperature, film thickness and storage time.

TL;DR: The effect of gamma radiation (10, 20, 30, 40, 50 and 60 kGy) on tannin, total phenolics, antioxidants activity and in vitro digestion of pistachio hulls has been investigated in this article.

TL;DR: In this paper, thin films of cadmium oxide have been deposited on glass substrate using the spray pyrolysis technique and their structural properties are studied by glancing angle X-ray diffraction.

TL;DR: In this paper, the γ −γ and γ−X K coincidence-summing corrections in gamma-ray spectrometry with p-type HPGe detectors are reported.

TL;DR: In this article, the effects of gamma irradiation on chitosan samples were determined in terms of physicochemical and functional properties, and the results showed that moisture contents were between 8.690% and 13.645%.

TL;DR: In this article, the effect of absorbed dose on grafting yield was investigated and the characterization of the grafted material was performed by FTIR spectroscopy and the swelling measurements at different pHs.

TL;DR: In this paper, the kinetics and mechanisms of hydroxyl radical/hydrated electron reactions with dimethyl phthalate (DMP) were investigated using pulse radiolysis and electron beam radiolyisation techniques.

TL;DR: In this article, the tensile strength (TS), tensile modulus (TM), bending strength (BS), bending modulus, and impact strength (IS) of prepared composites were 551,MPa, 780, MPa, 563, MPA, 3450 MPa and 17.kJ/m2.

TL;DR: In this article, a lookup table was developed to quantify the effect of high-energy cosmic rays on the Earth's biosphere by modeling terrestrial muon flux from any arbitrary cosmic ray spectra with 10-GeV to 1-PeV primaries.

TL;DR: In this paper, fast heavy ion irradiation (SHI) is used to modify the structural and gas sensing properties of Hydroxyapatite (HAp) thick films.

TL;DR: In this article, the effect of gamma radiation on room temperature ionic liquids has been evaluated by determining the variations in the physical properties such as color, density, viscosity, refractive index and electrochemical window.

TL;DR: This study indicates that this X-ray irradiator provides a practical alternative to self-shielded gamma irradiators for SIT programmes and routine absorbed dose measurement and absorbed dose mapping can be performed using a Gafchromic® film dosimetry system.