Biomedical subjects

B Gröbler

Publications and source records attributed to B Gröbler.

2 recordsLinked to original sources

PubMed1977

[Use of the 25-point ocular grid plate in quantitative-morphological studies of eutopic and dystopic testes of children].

From plains histologic preparations of children's testicles the volume of seminiferous tubules and extratubular tissue were calculated by use of the points counting method. In ectopic testicles, the extratubular part is significantly larger than in normally descended testes. The range of the values measured by this method diminishes the higher the total count of test points is. The 25-points-test-net of VEB Carl Zeiss Jena in particular met all requirements for quantitative examinations of the morphology of testicles.

Cell Count↗

PubMed1976

[Determination of statistical error using the hit method].

Referring to a histological example, an explanation is given which parameters of the hit procedure have an influence upon the magnitude of the random measuring errors. The dispersion of the measuring values decreases as the number of test points increases. Moreover, if the number of test points is equal, the dispersion is dependent on the relationship between test point distance and mean diameter of the object structures. It reaches a minimum if this ratio is greater than 1 or approximates 1. By subdividing a measurement with numerous test points into small sections it will be possible to calculate the standard deviation. For this, coarse-mesh test nets with few points are favourable.

Bone and Bones↗