Measurement of regional myocardial blood flow (RMBF) is crucial in experimental studies of myocardial ischemia and reperfusion in dogs. The standard measurement technique uses radioactive microspheres; however, not all institutions are able to dispose of radioactive waste and therefore cannot make use of this method. We tested a new, nonradioactive microsphere, labeled with colors instead of nu...

Cesium radioactive isotopes (134Cs and 137Cs) are dangerous to human health due to their long half-life and high solubility in water. Nuclear experiments, wars, and nuclear plant accidents have been the main sources of Cs release into the environment. In recent years, several methods have been introduced for the elimination of Cs radioactive isotopes from contaminated wate...

Background—Radioactive stents have been reported to reduce in-stent neointimal thickening. An unexpected increase in neointimal response was observed, however, at the stent-to-artery transitions, the so-called “edge effect.” To investigate the factors involved in this edge effect, we studied stents with 1 radioactive half and 1 regular nonradioactive half, thereby creating a midstent radioactiv...

By using stereospecifically double-labelled radioactive mevalonates it was shown that betulaprenols-6 to -9, found in the woody tissue of Betula verrucosa, each contain three biogenetically trans-isoprene residues and that the remaining residues are biogenetically cis. The results obtained with these radioactive mevalonates also indicated that the activity of isopentenyl pyrophosphate isomerase...

BACKGROUND Radioactive stents have been reported to reduce in-stent neointimal thickening. An unexpected increase in neointimal response was observed, however, at the stent-to-artery transitions, the so-called "edge effect." To investigate the factors involved in this edge effect, we studied stents with 1 radioactive half and 1 regular nonradioactive half, thereby creating a midstent radioactiv...

Although there are a number of reports concerning the uptake of various radioactive nuclides from surrounding water by aquatic organisms1), the quantitative informations on the transfer of radioactive substances through aquatic food chains have been scarcely obtained until now. In near future, in accordance with the rapid developement of the peaceful utilization of atomic energy in Japan, the p...

THE SUCCESSFl'L application of radioactive indicators in physiology caused the early introduction of a radioactive component into the erythrocytes and their use in blood volume determinations. While this method has found application in animal experiments, it is not very suitable for determination of the blood volume of humans, since ironlabeled red corpuscles can only be obtained in vivo, and t...

The chemical composition of sediments from the Arctic mountain Lake Bolshoy Vudjavr, situated in western part Russian zone, was studied. lake has been under intense anthropogenic load for more than 90 years since development richest apatite–nepheline deposits world started. A 27 cm thick sediment core sampled central at maximum depth 37.4 m. concentrations 50 elements were analyzed by mass spec...

Dilution is the mixing of radioactive waste with non-radioactive material, whereas downblending is the mixing of high-level radioactive waste with low-level radioactive waste. These processes have been applied predominantly at nuclear sites as part of the decontamination procedures for the disposal of blended wastes in licensed facilities. Proper health and safety assessments should be carried ...