Two counting techniques are proposed in this paper to estimate thoron ((220)Rn) concentration using a Lucas scintillation cell. The alpha activity build-up inside the cell is calculated theoretically by using Bateman equations. The first method is having a minimum detection limit of 325 Bq m(-3) and can be used for thoron measurement in thorium-processing plants. In the second method, thoron co...

.. INTRODUCTION EXPERIMENTAL METHODS. RESULTS AND DISCUSSION . REFERENCES ..•.... IS-986

Geochemical analysis of sediments recovered from NS-1 well and NS-2 well, Leuma Field, Coastal Swamp Depobelt, Niger Delta Basin was done to establish tectonic setting provenance. Data for ten major elements forty-three trace were obtained two boreholes. The geochemical signals display systematic stratigraphic trends in the wells that depict one source terrain. To determine provenance sediments...

The anticoagulant action of certain cations, particularly some of the lanthanides, has been known for forty years (2-6), and one of them, neodymium, has been used as an antithrombotic agent (4, 6-11). Little is known about the related actinides, such as uranium and thorium. Our interest in thorium derived from studies on the untoward effect of the endotoxin-induced generalized Shwartzman phenom...

The anticoagulant action of certain cations, particularly some of the lanthanides, has been known for forty years (2-6), and one of them, neodymium, has been used as an antithrombotic agent (4, 6-11). Little is known about the related actinides, such as uranium and thorium. Our interest in thorium derived from studies on the untoward effect of the endotoxin-induced generalized Shwartzman phenom...

Large areas of abandoned tin-mining pools have found secondary uses which provide natural habitats for aquaculture activities where most freshwater fishes are bred. Soils from tin-mining areas are rich in uranium and thorium. A study has been conducted on the status of waters and aquatic habitats in disused tin-mining pools and at water intake points for public drinking water supply to assess t...