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Results for “Scintillation Counting”

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At least 307 records · Page 17Linked to original sources
PubMed2000

A multi-sample liquid scintillation counting system for weak beta-emitting samples with single phototube detectors

The relative merits of low-level liquid scintillation counters with one and two phototubes, respectively, are discussed and an analysis of their background components is presented. A simple and compact system with manual sample changing is described. It counts four samples simultaneously, and it is based on the single-phototube arrangement where conical vials sit on the top of 28 mm diameter phototubes. A PC computer collects and processes the pulses from a specially designed electronic unit. The system is operated in a small underground counting room, a closet in the wall of a road tunnel under a fjord. Its performance is described.

Journal Article↗
PubMed1967

Gel scintillation counting of I-131 in plasma at high efficiencies.

A method is described for assaying low concentrations of (131)I in plasma by detecting the beta radiation in a gel scintillator. Higher detection efficiencies are obtained compared with measurements of the gamma radiation from this radioisotope using a well-type crystal of sodium iodide.

Gels↗
PubMed1977

Fibroblast monolayer cultures in scintillation counting vials: metabolic and growth experiments using radioisotopes and a microfluoremetric DNA assay.

We have developed a simple technique for the investigation of cellular metabolism and growth in cultured human fibroblasts which facilitates experiments using up to 3 x 10(5) cells in each of 100 or more culture vessels. The method has been used to study cell growth, glucose utilization and oxidation, and protein, RNA and DNA sysnthesis. The use of radiolabeled substrates in tracer experiments is simplified since transfer of cell material is not required. Methods for measuring both total cellular protein and DNA have been adapted to this culture system. Although we have used this tecnique for fibroblast cultures, it also can be easily applied to experiments on any other type of cell that can be grown in a monolayer.

Carbon Radioisotopes↗