Picture of a black hole

Strathclyde Open Access research that creates ripples...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of research papers by University of Strathclyde researchers, including by Strathclyde physicists involved in observing gravitational waves and black hole mergers as part of the Laser Interferometer Gravitational-Wave Observatory (LIGO) - but also other internationally significant research from the Department of Physics. Discover why Strathclyde's physics research is making ripples...

Strathprints also exposes world leading research from the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

Discover more...

Reproducibility of leukocyte migration from agarose microdroplets

Filer, D. and Pattison, J.D. and Anderson, W.G. and Gettinby, G. and Anderson, J.M. (1981) Reproducibility of leukocyte migration from agarose microdroplets. Journal of Clinical and Laboratory Immunology, 5 (3). pp. 185-189.

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

The 18-hour migration of leucocytes from 31 healthy persons was measured in 33 experiments by the agarose microdroplet method using 15-26 replicate droplets in separate culture wells in each experiment. A comparison of the measurement of the migration of leucocytes by a formula derived from two diameters of the droplets and by planimetry of the projected image of droplets, demonstrated the same wide range of coefficients of variation for the two methods and therefore no important difference in their accuracy. In using a ratio, the migration index, to express the size of differences between experimental groups of cultures, the correct choice of cut-off value demands knowledge of the distribution of that ratio amongst cultures no inhibited by the inclusion of "antigen" or other agent. This could not be ascertained from the observed data because of the practical limitation on the number of samples obtainable in each test. A computer simulation of the sampling process was used to determine this distribution and to evaluate statistical cut-off points. The size of the sample required for conventional degrees of accuracy is shown to vary according to the size of the mean migration area and its standard deviation in unstimulated control cultures. In the study 25/33 (76%) experiments would have been adequately assessed if 30 replicates had been used in every case; if 5 replicates had been used only 2/33 (6%) experiments would have been controlled. In the literature