The environmental neutron spectrum has been measured at Zacatecas City in Mexico. Neutron spectrum was unfolded from count rates obtained with a multisphere neutron spectrometer with a LiI(Eu) scintillator. With the spectrum information the ambient dose equivalent and the isotropic effective dose were calculated. A model based upon the geomagnetic latitude and the altitude above sea level, that...

The antileukemic activity (medium effective dose, MED) of a set of 37 carboquinones was modeled using a combination of the electrotopological state (E-state) and molecular connectivity indices with multiple linear regression. A four-variable model gave good statistics: r2 = 0.90, s = 0.21. Using the leave-one-out method, the cross-validation statistics indicate a model useful for prediction: r2...

Planned in-situ radiosensitization may improve the therapeutic ratio of image guided I prostate brachytherapy. Spacers used in permanent implants may be manufactured from a radiosensitizer-releasing polymer to deliver protracted localized sensitization of the prostate. Such devices will have a limited drug-loading capacity, and the drug release schedule that optimizes outcome, under such a cons...

Coals mined in some regions of the Transdanubian Middle Mountains in Hungary have elevated concentrations of Ra. The slags and ashes derived from these coals have been used as building material for schools and kindergartens. As the Ra reached up in these waste products of coal-firing systems, the gamma dose contribution in the buildings, which contained them, was calculated. In these places the...

Four patients with nicorandil induced ulceration are described, and the literature on the subject is reviewed. Nicorandil induced ulcers are very painful and distressing for patients. Clinically they appear as large, deep, persistent ulcers that have punched out edges. They are poorly responsive to topical steroids and usually require alteration of nicorandil treatment. The ulceration tends to ...

the present paper measures natural radioactivity in different areas of wassit governorate, using (hpge) detector. gamma spectrum analysis for each sample along with caululated specific activity show that the average concentrations of u-238, th-232, and k-40 have been 19.420±4.7 bq/kg, 18.487±5.05 bq/kg, and 204.266±46.9 bq/kg respectively, which is lower than the worldwide average value. while ...

The Rn and Rn enter the atmosphere mainly by crossing the air interface of either soil-air or building materials. The existence of relatively high indoor concentration maintains a large Rn, Rn concentration gradient between the materials and open air. The present paper deals with the experimental measurement of Rn, Rn concentrations and the associated inhalation dose rates due to them in the dw...

Radioactivity concentration of Naturally Occurring Radioactive Materials (NORMs) in shore sediments (samples) collected along the coast of Accra were analyzed using a gamma spectrometry with a high purity germanium detector. The specific activity concentrations range from 8.60 Bqkg to 61.01 Bqkg with a mean of 29.78 Bqkg for K, 0.62 Bqkg to 148.80 Bqkg with a mean of 22.04 Bqkg for Ra and 0.17 ...