ABSTRACT
In order to assess the radioactive level in the environment, the specific activities of 238U, 232Th and 40K were measured by using a gamma ray spectrometer based on a NaI(Tl) detector. The results showed that the specific activities of 238U, 232Th and 40K were 12.846-88.585, 1.304-26.656 and 11.598-2275.896 Bq/kg respectively. The radium equivalent activity was also calculated which varied from 0.893 to 175.244 Bq/kg. The radium equivalent average values were lower than the world average. In general, the highest level of radium equivalent value was in leafy type NPK fertilizers. The urea type had no radionuclide. The specific activity and absorbed dose rate at 1m above the ground surface (nGy/h) after NPK fertilizers agricultural applications were calculated and the maximum value of dose rate was 0.15 percent of the world average outdoor exposure due to terrestrial gamma radiation.
ABSTRACT
An accurate rapid and very simple PMR method has been developed for the determination of piracetam in drug formulations. The relative st and ard deviations were 0.85%, 0.92% and 2.07% for the pure drug, the capsules and the ampoules, respectively. There was no evidence of interference from the excipients. The method was based on the comparison of the integral of the well-defined singlet at sigma 4.01 [N-CH2] of piracetam with that of the sharp singlet at sigma 6.4 [CH=CH] of maleic acid, the internal st and ard, using D2O as a solvent