Biomedical subjects
Publications and source records attributed to G Ruhenstroth-Bauer.
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The results show that both the direction and the intensity of the geomagnetic field can be sensed within the chamber of a Zeiss Cytopherometer. This suggests that electromagnetically induced fluid streaming might play a role in the perception of the geomagnetic field by organisms, although it is not clear at present in which organ the perception occurs. A basic requirement for such an organ would be an anisotropy of cells or cellular structures. The nervous system with its parallel axons, or specific cells associated with the nervous system, could thus be possible locations of the sensitivity towards magnetic fields.
In the last few years we have shown that atmospherics of different frequencies correlate with the onset of epileptic fits, heart infarcts and with the intensity of an inflammation reaction in rats. Now we show that sudden deafnesses are related (multiple R2 - 0.08) with the onset of 12 kHz in the first part of the day before the sudden deafness and the absence of 8 kHz in the first part of the day of this event.
In an earlier study it was shown that an isotonic salt solution within a measuring chamber of a cytopherometer is rotating caused by Lorentz forces, if the magnetic earth field crosses the electric field in the chamber. This may be a model of the ability of certain higher organisms to recognize the direction of the magnetic earth field. The topic of this study was the possible effect of the magnetic earth field in humans. It is shown that the duration of REM latency is influenced by the position of sleepers in N-S or E-W direction: it is shortened in E-W direction (p = 0.02).
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The concentration of substances with glucagon-like immunoreactivity (GLI) was determined in arterial blood plasma of rats up to 4 weeks after partial hepatectomy. 10 h following surgery a more than 18-fold increase in GLI + glucagon immunoreactivity could be observed. About 2/3 of the maximum activity seems to be of non pancreatic origin. The levels returned to normal about 22 h after surgery.
One time i.p. injections of 5 -20 mg Pregnenolone-16alpha-carbonitrile (PCN) effects the mitotic activity of rat liver cells during a time period of 24 hours to be 20 times higher than the normal mitotic rate. This, however, does not result in an measurable increase of cell numbers and cell volumes. Furthermore, total liver DNA, RNA, protein and dry-weight remain unchanged. The injection of 7 times 10 mg PCN also results in the elevation of the mitotic rate. Return of the elevated mitotic rate to base level takes 18 days from the time the last injection of PCN was administered. During this time the number and the average volume of liver cells increases by 28% and 30%, respectively. The dry weight of liver and tetraploid nuclei increase in number, whereas RNA- and protein content remains unchanged. All parameters have reached the base line after 4 - 6 weeks following the last injection of PCN. No histological changes were observed after multiple doses of PCN that cause hyperplasia and hypertrophy of liver tissue. Hypertrophy of liver cells follows the observed hyperplasia and therefore is not expected to be the cause of the hyperplastic processes.