Uniform 125I disk sources were prepared as a reference source to calibrate NaI (Tl) scintillation detector to measure125I activity on a filter of air monitor in a laboratory. The base of the disk source was a charcoal activated polyurethane foam rubber mat of 75mm in diameter, 2mm in thicknes. 125I disk sources of approximate 0.5kBq, 1kBq, and 10kBq were obtained through immersing disks in ethanol solution containing Na125I of 0.5kBq/ml, 1kBq/ml and 10kBq/ml, respectively, and then drying up them. The uniformity of the distribution of 125I on the disk source was estimated by analyzing the autoradiograph of the disk source using an imaging analyzer. The radioactivity of125I was distributed uniformly on the surface of the disk source within an uncertainty of about 10%.
Wood-plastic combination (WPC) was produced by γ-irradiation of persimmon impregnated with acrylonitrile and styrene. The hardness and strength of WPC obtained zvere higher than those of an unmodified wood. Thus, it was found that the WPC is suited for a head of golf club, because the shore hardness value of WPC is 36% greater than that of unmodified wood. An impregnation method of monomers with some pigments could produce colored WPC without diminishing natural grain. Head of golf club could be manufactured from colored WPC in practice.
High-performance liquid chromatography (H PLC) equiped with on line radiometric and optical detectors have been applied to the radiochemical analysis of ten commonly-used99mTc-radiopharmaceuticals with a view point to check the radiochemical purities of the compounds before use. Chromatographic conditions were determined by examination of the types of column and mobile phase. A gel filtration (Shim-pack DIOL-300) and reversed-phase column (Zorbax ODS) were found to be suitable for99mTc-HSA and the other99mTc-compounds, respectively. From these results, HPLC has been shown to be useful method for the analysis of99mTc-radiopharmaceuticals, with rapidity and excellent precision.