Showing papers in "Radiation Physics and Chemistry in 1979"

TL;DR: The results show that most of these dosimeter materials used for routine dosimetry in radiation processing with gamma radiation when used under extreme conditions of relative humidity and temperature may give erroneous readings unless suitable corrections are made.

TL;DR: The present work shows measurements at high dose rates for calibrations with gamma rays, and finds that only those plastics containing the radiochromic triphenylmethane cyanides or methoxides, i.e. nylon, polychlorostyrene, polyvinylbutyral, orpolyvinylpyrrolidone, can correctly interpret dose determinations from electron beam irradiation.

TL;DR: In this article, a review of the reactions of hydroxyl radicals, hydrated electrons and SO 4 − radicals with amides, amino acids, peptides, DNA constituents and related compounds is presented.

TL;DR: In this paper, the authors investigated the radiation crosslinking of thermoplastic elastomeric automotive parts and EPDM electrical insulation, and found that these properties improve mar resistance, flexural set and deformation at elevated temperatures.

TL;DR: In this paper, a semi-solid mixture with high energy radiations was considered, and it was shown that the polymer itself becomes activated by the radiation and the monomer is then homografted on its own polymer.

TL;DR: In this paper, it was shown that the response expressed in terms of optical absorbance as a function of absorbed dose in LiF is approximately the same for electron beams at very high absorbed dose rates (12 rad · s -1 ) and for gamma radiation at intermediate dose rates.

TL;DR: In this paper, the effects of a small quantity of ammonia (NH3) added to exhaust gases containing nitrogen oxides (NOx) and sulfur dioxide (SO2), the characteristics of the NH3 added to the gases to facilitate the removal of NOx and SO2 when the gases were irradiated by electron beam were studied.

TL;DR: Radiachromic detectors have been developed that minimize problems associated with QA procedures, and may be standardly checked with calibration services available to industry by the National Bureau of Standards.

TL;DR: In this paper, the physical aspects of electron beam processing are discussed and a practical method for estimating the required specifications of the electron accelerator is presented for electron energies between 0.30 and 10.0 MeV.

TL;DR: In this paper, the influence of specific parameters on the chemical effects in irradiated foods were investigated. Among the parameters considered are: food composition, physical state of components, irradiation temperature, dose-rate, and total dose.

TL;DR: In this article, the effects achieved by the radiation of a rubber are quite similar to those resulting from heat, however, radiation cure or precure of compounds offers the advantage that the degree of crosslinking can be better controlled.

TL;DR: In this article, it was shown that the addition of acid to the methanol-styrene system enhances the grafting rate of styrene to polypropylene still further and they attributed the effect to hydrogen atoms.

TL;DR: The study reported here is concerned with the radiating of acrylamide to polymer supports for evaluation as a new biomaterial.

TL;DR: In this paper, a model for the viscoelastic behavior of flexible polymers is proposed to account for the non-network and network fraction formed not only by permanent crosslinks induced by radiation, but also by chain entanglements whose lifetime (on the scale of NMR measurements) may be adequate to act as temporary crosslinks.

TL;DR: In this paper, the decoloration and degradation of a commercial anthraquinone dye (Acid Blue 40) was carried out by electron-beam irradiation, and experiments were done in a flow system using a five-stage, dual-tube bubbling column reactor.

TL;DR: In this paper, the use of high energy radiation for the synthesis and improvement of polymer properties and the formulation of radiation curable compounds for automotive/appliance wire applications and high voltage insulation is discussed.

TL;DR: In this paper, the authors found that the enhanced radiation crosslinking tendency of polyvinyl acetate and ethylene-ethyl acrylate copolymers over homopolymer is proportional to the comonomer content, which is caused by an increase in amorphous polymer content and by structure-related factors.

TL;DR: In this paper, the authors investigated the effect of 2,4-hexadiyn-1,6-bis(ethyl urethane) and HDDEU on crosslinking in polyethylene.

TL;DR: In this article, the yields of naphthalene and biphenyl produced in irradiated cyclohexane solutions for solute concentrations up to 5 × 10 -2 mol dm -3 have been measured.

TL;DR: In this paper, the authors measured the thermoluminescence of irradiated low-density polyethylene, both with and without introduced biphenyl, simultaneously with the recording of both the spectrum of the emitted light and the absorbance of biphenially anions.

TL;DR: In this article, the rates of oxidation of cyclohexadienyl radical by metal ions in water have been measured and it is suggested that the reduction potential of the cycloxide radical lies between -0.25 V and 0 V.

TL;DR: In this paper, the photolysis of monochloroacetic acid at different concentrations in aqueous solution was studied with u.v-light of various energies from 4.88 to 6.77 eV/quantum (253.7 to 184.9 nm).

TL;DR: In this paper, an electron beam crosslinking process for high voltage power cable by solving problems of the foaming and discharge breakdown of thick polyethylene insulation during irradiation was developed.

TL;DR: In this article, the radiolytic degradation of U(IV) to U(VI) has been investigated in H2SO4 and HCl media and the radio-lytic yield, G[U(VI)] has been determined at various concentrations of U (IV) both in aerated and deaerated solutions.

TL;DR: In this paper, a cost effective cellulose waste pretreatment for optimizing the sugar yield is described, and various experimental approaches for achieving this objective are described. But the main focus of this paper is on the use of various organic acids in place of sulfuric acid for the hydrolysis reaction.

TL;DR: A review of electron-beam-induced conductivity (EBIC) in insulating solids is presented in this paper, where some of the main observed features of EBIC are described.

TL;DR: In this article, the reactions of electrons with a number of peptides containing aliphatic and aromatic side groups were investigated in aqueous glasses at low temperatures by electron spin resonance spectroscopy.