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Biomedical subjects

M Moravec

Publications and source records attributed to M Moravec.

35 records · Page 2Linked to original sources
PubMed1980

[Origin and pathogenesis of polymeric dipyrrilmethenes].

By means of the silicagel thin layer chromatography and spectrophotometry the qualitative differences of the polymeric dipyrryl methenes in the bile and in the urine in normal and pathological conditions were demonstrated. The differences between the polymeric dipyrryl methenes of fresh hepatic bile and the polymeric dipyrryl methenes of the older hepatic and fresh duodenal bile were found. The same differences were found in the urine between the normal urinary polymeric dipyrryl methenes and the polymeric dipyrryl methenes in the hyperhemolytic state and in the bile duct obstruction. An entirely different quality of the polymeric dipyrryl methenes in the urine is to be admitted in the liver diseases.

Anemia, Megaloblastic↗
PubMed1979

[Contribution of ultrastructural analysis to the knowledge of the neuromuscular relationships in the nodal and conduction tissue].

The ultrastructure of the atrio-ventricular junction in the rat heart fixed in situ was studied on serial fine sections. The relationships between the specialized tissue and the nervous system were studied after labelling adrenergic endings with 5-OH-dopamine. Among the various types of nerve endings a distinction may be made between: 1) adrenergic or cholinergic free endings; 2) large "cluster" endings of the cholinergic types, seen mainly in the equatorial regions of nodal cells; 3) small diameter cholinergic before the development of heart failure or significant card synaptic images; 4) afferent neurons, whose endings, rich in glycogen and mitochondria supply the conduction tissue fibres, getting into or through the muscle fibre. The intermembrane space is then 20 nm. The analogy between the images observed and the ultrastructural aspects of intrafusorial fibres in skeletal muscle is discussed.

Adrenergic Fibers↗
PubMed1975

[The rat ventricular myocardium in chronic hypercapnia. Electron microscopic study].

An electron microscope study of the left ventricular myocardium from rat acclimatized to chronic hypercapnia was done in order to complete the preceding work concerning general effects of respiratory acidosis. After 15 and 30 days of the acclimatation to 8% CO2 no lesions of the myocardium could be found. The results of the morphometric analysis indicated, however, discrete modifications of heart ultrastructure similar to those found before in hypoxic and failing hearts: namely a decrease of mitochondrial mean diameter and a non significant decrease of mitochondrial fractional volume. The latter was accompanied by a significant decrease of myofibrillar mass. The presence of cellular oedema seems to be suggested by an increase of fractional volume of the cytosol. The mechanism of these changes is not easy to explain. Further work will be necessary to make a choice between two possibilities: (1) depressed contractility related to some direct effect of high pCO2 and (2) tissue hypoxia secondary to local effects of the former.

Animals↗
PubMedDate not supplied

[Speech illusions and their significance for aviation and space flight practice].

The pattern of erroneous perception of intelligible and incoherent words accompanied by loud noise has been investigated. It has been found that proper interpretation of incoherent words depends at large on their rhythmic, or syllabic structure. As a rule, the words are reconstructed in the back-to-forward direction. One- and two-syllable words with predominant median and low frequencies are those which are most frequently subjected to speech illusions.

Adult↗