Sentence examples for radioactivity standards from inspiring English sources

And for over a quarter of systems that violated the arsenic or radioactivity standards, there is no record that they were ever contacted by a regulator, even after they sent in paperwork revealing their violations.

A set of radioactivity standards was prepared by applying known amounts of 125I/131I to discs of tissue sections 3 mm in diameter and 5-μm thick mounted onto SuperFrost® Plus slides.

The goal of the CCRI II) "Realisation of the becquerel" project is to design a reproducible radioactivity standard which will increase the robustness of the current international reference system for radioactivity measurements.

I-radioactivity standards were also included to enable calibration of binding density.

The radioactivity of excised tissue samples and radioactive standards were counted by a Wizard2 300 automatic γ-counter (PerkinElmer).

Results are expressed as percent of total radioactivity ± standard deviation.

At the conclusion of processing, the images are stored with units of kilobecquerel in such a way that the total number of events in the image is equal to the radioactivity in standard units (kBq).

Analysis of different samples, measurement of their radioactivity, and standard curve fitting were obtained by using computerized gamma counter.

Knowing the radioactivity concentration in standards and the injected dose, the autoradiographic images were converted to color-coded parametric images of percent injected dose/g tissue (%ID/g) using MCID Elite image analysis software version 7.0 (Imaging Research Inc., St. Cathrines, Ontario, Canada).

In the SPECT studies, the calibration standard is used (i) to check the accuracy of the recovered total radioactivity in the standard in the reconstructed images and (ii) to check that the reconstructed total radioactivity decreases over time again due to radioactive decay and produces a good estimate of the physical half-life of the radionuclide in question.

These data matched very well with the values obtained by the standard radioactivity measurements.