MICROSCOPICAL TECHNIQUE

Microscopical Society of Ireland

Light microscopical diagnosis of rabies

Shadow casting; a technique to show surface texture in microscopical material.

Objects seen through the microscope by transmitted light are translucent in differing degrees. Staining gives a measure of differential opacity and contrast to biological material but, even here, the appearance, like that of an x-ray picture, is a record of relative opacities. Varying the focal plane, of course, allows a range of optical sections, and from this the surface appearance can be inf...

A Light Microscopical Investigation And

113 randomly selected frustules of Cyclotella taxa, taken from the plankton of four lakes, have been investigated with respect to variation between the two thecae of each frustule and also variation within and between populations occorring in the different lakes. Multivariate statistical analyses of phenetic similarity of the 226 thecae were based on a data matrix recording the status of 11 cha...

Electron microscopical findings in hypertrophied human ventricle.

The, normal ultrastructure of the human myocardium is fairly well documented (Porter and Bonneville, 1963; Stenger and Spiro, 1961; Burdette and Ashford, 1963; Lannigan and Zaki, 1966) and some of the prominent subcellular changes have also been described (Burgos and Rodriguez-Echandta, 1966; Alexander, 1967). We should like here to present the ultrastructural features observed in hypertrophied...