Showing papers in "Applied Radiation and Isotopes in 1994"

TL;DR: Zr-89 was produced in high amounts via a (p,n) reaction on Y-89 and purified using a hydroxamate column and quantitatively formed complexes with the chelating agent desferal at low concentrations.

TL;DR: In this paper, the traditional technique for processing of reactor-irradiated 186 W-enriched tungsten oxide (WO 3 ) targets involves formation of 188 W-sodium tungstate solutions by target dissolution in 0.1 M NaOH containing 5% sodium hypochlorite solution.

TL;DR: The effect of solvents, potassium salts and temperatures were studied to determine optimum labeling condition and the best results were obtained using carbonate as the counter ion and acetone as the solvent at room temperature.

TL;DR: Three methods for fluoroacylation of amines are compared using 2-[ 18 F]fluoroaliphatic acyl moieties as small prosthetic groups as well as common intermediates for all three methods with > 90% radiochemical yields.

TL;DR: The findings first prove the applicability of EPR dosimetry on tooth enamel for a life-time including accident dose reconstruction of individuals as a basis for epidemiological studies and show that the reconstructed doses are unreasonable until very good agreement with the original personal doses.

TL;DR: In order to improve tracers for amino acid transport studies with SPET, radioiodinated methylated tyrosines and compared their brain uptake and in vivo deiodination in mice are compared and O-methylation not only leads to a higher lipophilicity and hence significantly higher brain uptake but also significantly prevents in vivoDeiodination.

TL;DR: In the rat brain, comparable levels of (-)-[18F]FBT were found in the striatum, cortex, cerebellum and hippocampus during a 3 h period, and may be potentially useful for mapping vesamicol receptor density in vivo.

TL;DR: The mass attenuation coefficients of the LRd-A 3 Brazilian soil have been measured at seven energies in the range of 59.5-1408.0 keV.

TL;DR: A substantially slower blood clearance of 111In-EDTMP in comparison with the other complexes suggests partial indium exchange between the chelate and transferrin, and high affinity for bone and the radionuclide uptake into the skeleton was found.

TL;DR: In this article, the effect of fine structure on the mass attenuation coefficient values using Mn K α and Cu K α x-rays derived from K x-ray emitters, 55 Fe and 65 Zn radioactive sources, by a differential absorption technique was determined.

TL;DR: The deduced thick target yields are compared with those obtained experimentally and the activation method involving the stacked-foil technique is used.

TL;DR: 13 C and 1 H NMR studies were used to characterize diprenorphine and buprenorphines derivatives and, in particular, to confirm the position of methylation.

TL;DR: In this paper, the relationship between soil parameters such as density, atomic number of the components and electron density, and mass attenuation and effective atomic number is presented, for Brazilian and Italian soils.

TL;DR: Tap water, flushing water and drinking water including natural mineral water, artificial mineral water and distilled water have been investigated for their radon concentrations and it is found that annual effective dose due to direct consumption of water is far greater than that due to inhalation of radon emanated from tap water andFlushing water.

TL;DR: In this paper, the linear attenuation and mass attenuation coefficients of the 123 keV γ radiation from 57 Co by dilute solutions of NaCl were studied for varying concentrations.

TL;DR: The synthesis, radiolabelling and stability of radioiodinated m-iodobenzylguanidine are reviewed, and the Cu(1+)-assisted nucleophilic exchange radioiodination can be considered as the method of first choice.

TL;DR: In this paper, the authors reviewed the excitation functions and production data of 66 Ga, 67 Ga and 68 Ga appearing in the literature up to the end of 1992 and compiled the cross section data as well as calculated and measured thick target yields of 66 Zn(p, n) 66 Ga.

TL;DR: In this article, the radiolytic decomposition rate of octachlorobiphenyl (8CB) in neutral isopropanol was studied as a function of dose using spent nuclear fuel as a γ-ray source.

TL;DR: In this article, a generator for the production of the α-emitting radionuclide 212Bi and its parent nuclide 212Pb was developed, based on the emanation of 220Rn from [228Th] barium stearate.

TL;DR: In 111 subjects not occupationally exposed, bone lead content increased steadily with age in both men and women, and higher than expected bone lead levels were observed in two-thirds of 27 subjects working in occupations with potential for lead exposure.

TL;DR: In this article, the sorption desorption behaviors of Cs ion in the concentration region of 10−9 to 10−4 m-equiv mL−1 were studied using bentonite, humic acid and sand as well as their mixtures.

TL;DR: These studies demonstrated that the blood-clearance was fast for [carboxy-11C]nicotinamide but considerably slower for 3-amino[car boxy- 11C]benzamide and 3-methoxy[carboxY-11 C]benZamide, which initially had a high brain uptake, followed by a rapid wash-out.

TL;DR: In this article, a gamma and an x-ray spectrometer, 4πβγ-coincidence equipment, liquid-scintillation counting (LSC) equipment and a calibrated ionization chamber (IC) have been used to determine the decay scheme parameters of 68Ga and the specific activity of a 68Ge/68Ga solution.

TL;DR: It is suggested that as little as 1 g of sugar would be one of the most useful emergency dosimeters for people inside their dwellings, at least for absorbed doses greater than about 0.02 Gy.

TL;DR: Two plant categories with distinct photosynthetic CO2-fixation pathways, adapted to their different water use efficiency, have been compared in order to estimate the natural variation of the biological tritium fractionation factors among different biosystems.

TL;DR: A new and simple method for the selective condensation of no-carrier-added [ 11C]nitromethane with various substituted (protected) benzaldehydes to [beta-11C]beta-nitrophenethyl alcohols was developed.

TL;DR: The potential of this carbon-11 labeled benzothiazine calcium antagonist to visualize the regional brain calcium channels in vivo by positron emission tomography was indicated; however, no promising sign was found in the myocardium.

TL;DR: The volatile byproduct from the [123I]IMZ preparations was identified as I-[ 123I]iodobutane by its trapping characteristics and by its retention time in two different HPLC systems and was not due to the presence of impurities in the tributylstannyl precursor.

TL;DR: An improved HPLC method to purify erythrocyte cholesterol for use in measuring in vivo cholesterol synthesis from 2H2O using a smaller compression cartridge column at a flow rate of 3 mL/min is reported on.