Showing papers in "The International Journal of Applied Radiation and Isotopes in 1971"

TL;DR: It was concluded that the 103Ru complex could be a useful marker in a variety of digestion studies and may conveniently be used in digestion studies together with the 51Cr complex of ethylenediamine tetraacetic acid, a water soluble marker not adsorbed by the particulate fractions of digesta.

TL;DR: In this paper, the deux isomeres de l'hydroxy-6 dihydro-5,6 thymine, forme cis and forme trans, ont ete obtenus par irradiation gamma de la thymine en solution aqueuse desaeree (2. 10 −3 M) avec du 60 Co.

TL;DR: In this paper, the authors used the 11Np, α)11C reaction with bombardment of solid LiNH2 or a gas target containing 99% N2 and 1% H2.

TL;DR: In this paper, the reaction of carbon dioxide with water and hydroxide ions has been studied by measuring the rate of oxygen exchange between C18O2 and H216O. The mathematical treatment of the kinetics allows to determine with accuracy the diffusion flow between the gas and the liquid phase, in the same way as the CO2 hydration rate.

TL;DR: In this article, a chemical procedure based on bis(2-ehtylhexyl)phosphoric acid is described for the recovery and purification of 99Mo from short-lived fission products.

TL;DR: Although the addition of some chemicals to the sample caused little change in the counting efficiency, a suspending agent produced a counting efficiency and spectral shift different from those obtained for the samples containing dyes that was related to the spectrophotometric absorbancy of samples containing various dyes.

TL;DR: In this article, 6 μm monodisperse particles of fluorinated ethylene propylene (Teflon 120 Dupont) were manufactured and tagged with 99 m Tc and non-radioactive Cd,Cu, Ni, Mn and Cr.

TL;DR: Monodisperse particles of fluorinated ethylene propylene (Teflon 120, Dupont) were produced with a spinning disk technique and tagged with 18F, a positron emitter with a half-life of 110 min, by irradiation with protons to study tracheobronchial clearance in man.

TL;DR: In this article, a column of Amberlite IRA-400 ion exchange resin was used to attach the nuclide to adsorption sites on albumin which become exposed during the physical expansion of the molecule at low pH values.

TL;DR: It is recommended that either 2 ml of plasma or 1 ml or urine is added to 10 ml of scintillant based on a 1:1 mixture of toluene and Triton X-100 containing PPO and POPOP.

TL;DR: In this article, the average energy of various beta emitters having allowed as well as some forbidden transitions is calculated by approximating the Fermi function appearing in the Fermani theory of beta decay to a three-term polynomial.

TL;DR: In this article, the correlation between the optical density, etching time and track density for three plastic track detectors of different sensitivities (namely cellulose nitrate, cellulose acetate and polycarbonate) under different irradiation conditions was investigated.

TL;DR: The basic technique with appropriate changes has been adapted for the rapid assaying of 90 Sr contamination in the 90 Y sample and for the preparation of 140 La from 140 La- 140 Ba.

TL;DR: The methods are compared for their usefulness in the preparation of radiopharmaceuticals containing carbon-11 and a recoil plus chemical synthesis method is described.

TL;DR: In this article, a method for resolving mixtures of two β-emitting radionuclides is described utilizing liquid scintillation counting procedures which combine simplicity of quench correction with the reliability of the discriminator ratio method of double-label counting.

TL;DR: The target systems used for the production of carbon monoxide and carbon dioxide in the Medical Research Council Cyclotron at Hammersmith Hospital are described and reasons are stated for the present routine use of hydrogen as a target sweep gas.

TL;DR: In this article, the possibility of calibrating 63 Ni by the efficiency tracing method has been examined and the activity content of a solution standard, prepared by the National Bureau of Standards, has been measured by this method.

TL;DR: In this article, a smoking machine is described which gives quantitative recovery of the various smoke phases, i.e., sidestream, mainstream, butt and ash, using carbon-14 compounds as tracers to measure the recovery.

TL;DR: A simple chemical dosimeter is described for measuring gamma-ray doses useful for insect sterilization, seed-sprouting inhibition, and food shelf-life extension and the response does not vary with dose rate.

TL;DR: The process in which photoelectrons escape into the aluminum liner of the well is found to be responsible for most of the degraded 88-keV γ-ray pulses which fall below 39 keV.

TL;DR: In this article, the conversion process of the 392 keV γ-transition of 113mIn has been reinvestigated using two accurate counting methods: the emission rate of conversion electrons was measured with a 4πe-X coincidence method using a proportional gas flow counter together with two NaI(Tl) crystals or a Si(Li) detector.