Background: The radioactivity levels in sediment and rock samples of İkizdere and Kaptanpaşa Valley have been determined. To our knowledge, there seems to be no information about radioactivity level in the İkizdere and Kaptanpaşa Valley sediments and rocks so far. Materials and Methods: The average radium equivalent activity (Raeq), the total absorbed dose rate (D), the external risk index (Hex...

BACKGROUND One approach to resolving some of the in vivo functions of alpha-crystallin is to generate animal models where one or both of the alpha-crystallin gene products have been eliminated. In the single alpha-crystallin knockout mice, the remaining alpha-crystallin may fully or partially compensate for some of the functions of the missing protein, especially in the lens, where both alpha A...

Uranium is a regulated contaminant (maximum level [MCL] 30 μg/L) that contributes to the gross alpha activity of groundwater. The adjusted (MCL 15 pCi/L) determined by subtracting total uranium from measured activity. U.S. water utilities can use mass-based and radiochemical analysis methods for compliance monitoring uranium. Mass-based measurements conversion factor 0.67 pCi/μg calculate This ...

OBJECTIVES: The objectives of this project were to determine and quantify the source of bias and error that affect the gross alphaparticle activity (GAA) and the uranium concentration of drinking water samples; determine conditions under which the GAA and the uranium concentration can exceed their true values and cause false-positive violations; provide guidance to water utility, regulatory, an...