Comment on "percolation properties of the 2D Heisenberg model".
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Biomedical subjects
Publications and source records attributed to E Seiler.
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For the synthesis of progesterone the placenta uses cholesterol which is derived from low density lipoproteins (LDL). Apoprotein B (apo B) is the mediator for the uptake of LDL into the cell. This investigation was done to find relations between progesterone and apo B concentrations in the blood serum of pregnant women. 269 patients (8th to 41st week of pregnancy) were studied. Progesterone was estimated by radioimmunoassay, apo B by radial immunodiffusion. The concentration of apo B decreases from 8th/9th to 14th/15th week of pregnancy significantly, and this is followed by a continuous increase of the apo B concentration until parturition. The concentration of progesterone increases during pregnancy. The intermediate decrease after the 14th/15th week is to be seen in connection with the luteoplacental shift.
Intravenous application of dehydroepiandrosterone sulphate (DHEA-S) was performed in 6 women with normal progress of pregnancy, 3 pregnant women with multiple pregnancy and 4 pregnants with intrauterine death of the foetus (32nd to 38th week). The oestetrol concentrations in blood serum were estimated during 5 h after the injection. In most cases an increase could be observed, but this was inhomogenous. The oestetrol concentration even rises in cases of intrauterine death of the foetus. In 7 cases of uncomplicated pregnancies the DHEA-S loading test was done within 2 to 6 h before delivery. The oestetrol concentration in the cord serum of the newborns was not higher than in controls without DHEA-S application, whereas oestradiol in maternal serum showed the expected rise. We conclude that the determination of oestetrol after DHEA-S loading can not be used for the judgement of the foetal situation.
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This is a report about the results of Parlodel and neurosurgical treatment of 30 patients with infertility and amenorrhea, in 18 cases combined with galactorrhea. There were 4 cases of non-ovulatory cycles with or without oligomenorrhea. 2 young girls had a primary amenorrhea. All patients wanted to have children. A pituitary tumor was diagnosed in 15 patients, it was microsurgically removed in 7 cases. 18 of 30 patients became pregnant after a drug treatment or combined neurosurgical and drug therapy.
In 31 pregnant women in the 32nd to 40th week of pregnancy estimations of apoprotein B in the blood serum were done. Besides this, in 15 cases the concentration of apoprotein B in the umbilical cord serum was measured. Furthermore, apoprotein B and dehydroepiandrosterone in cord serum and estriol in the serum of the mothers were measured in 10 cases. Dexamethasone was administered to 6 patients in order to prevent respiratory distress syndrome of the newborns. It has been tried to explain the changes of the parameters.
The levels of human growth hormone (HGH), ACTH and cortisol in the plasma of 100 middle-aged men were measured by means of radioimmunoassay (12 patients in the phase of hospitalization after myocardial infarction, 47 patients in convalescence, 31 patients in post-convalescence, 10 healthy men). Twenty patients in the phase of convalescence and all patients in post-convalescence did exercises on bicycle ergometer with submaximal loading. Patients after myocardial infarction showed significantly lower basic levels of HGH than healthy persons, and the increase in the HGH level induced by exercise was significantly lower. The hormones ACTH and cortisol showed only slight differences. The secretion of the pituitary hormones, mainly HGH, seems to be altered in patients after myocardial infarction.
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