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Biomedical subjects

G Koch

Publications and source records attributed to G Koch.

At least 451 records · Page 25Linked to original sources
PubMed1977

[The immunofluorescence-microscopical evidence of insulin and glucagon in transplantated isolated Langerhans' islets in diabetic rats and dogs (author's transl)].

With the histochemical immunofluorescence technique were demonstrated the insulin and glucagon in the transplantated isolated Langerhans' islets in the liver at diabetic rats and dogs. Further on were tested the diabetic metabolic level with aid of clinico-chemical methods during the period of investigation (blood glucose, serum insulin, glucose tolerance test). It was found that after transplantation, 1 year by the rats and more than 8 weeks by the dogs, is existing a normoglycemic level. In the transplanted islets were seen a good immunofluorescence of insulin in the B cells and the glucagon in the A cells in all investigated stages.

Animals↗
PubMed1977

[Fate of orally administered beta-acetyldigoxin in man (author's transl)].

After oral administration of 3H-beta-acetyldigoxin to four patients aspirates of gastric and duodenal contents were obtained with intestinal tubes. Concentration of label in the aspirates was measured. Radiochromatographic analysis of the aspirates showed that 90% of the beta-acetyldigoxin was unchanged during the period it was in the stomach. In the duodenum a small part of the administered dose was transformed to 3H-alpha-acetyldigoxin. When given 3H-beta acetyl-digoxin intraduodenally to three subjects in the portal vein blood 93% of the labelled compunds was 3H-digoxin. According to these data the absorption of beta-acetyldigoxin can be described as follows: After oral ingestion beta-acetyl-digoxin rapidly passes the stomach with a half-life of 10 min. Most of the glycoside is absorbed unchanged in the duodenum. On passage through the intestinal wall the acetyl group is removed and digoxin is the active drug reaching the heart.

Administration, Oral↗
PubMed1977

[Gastroenterostomy, indications--complications--reparation (author's transl)].

After presenting the indications of the gastroenterostomy in accordance with current valid pronciples, the early and late postoperative disturbances and their corrections are described. The main immediate complications is the gastric paralysis of the stomach and later the peptic jejunal ulcer. Conservative therapy as well as possible, surgical treatment, especially the degastroenterostomy with and without resection are mentioned.

Aged↗
PubMed1977

[Magnesium level in the serum and erythrocytes during pregnancy, delivery and puerperium].

Complexometric determinations of serum magnesium levels, moreover partly of Mg concentrations in whole blood, and withal determinations of hematocrit in 489 healthy pregnancies, parturients, puerperants (1 to 10 days post partum), and nonpregnant women were performed. By aid of these values we were able to calculate Mg concentrations in 100 ml erythrocytes (Mg E 100). The apparent decrease of serum Mg during pregnancy may be founded according to the changes of the plasma volume. However, actually the total (absolute) ammount of serum Mg is increased in pregnancy. We suppose some influences on serum Mg due to stimulation of the thyroid gland in pregnancy and further those of Mg being released from the muscular cells of uterus those been destroyed after delivery. The increased erythrocyte Mg during pregnancy and post partum confirm the view that there are no corresponding relations between Mg concentrations of serum and those of erythrocytes. The possible causes of the increase of erythrocyte Mg in pregnancy are discussed in detail.

Delivery, Obstetric↗
PubMed1977

[Coecal complications in distal colonic obstruction (author's transl)].

Construction and function of the colon leads to dysfunction of the coecal region as a result of obstruction of the distal part of the colon. Painful coecal distension, ischaemic inflammatory bowel-wall disturbancy, perforation, or secondary appendicitis are the most frequent complications. Because of these complications, the real origin of the illness is often micjudged. In diagnosing appendicitis in the aged patient, distal colonic stenosis should be considered and, if possible, excluded. 6 cases of coecal complications (6,3%) in 96 patients with distal colonic cancer were observed.

Age Factors↗
PubMed1976

Synthesis of the mitochondrial inner membrane in cultured Xenopus laevis oocytes.

The purpose of this study was to investigate the contribution of mitochondrial and cytoplasmic protein synthesis to the biogenesis of cytochrome oxidase (ferrocytochrome c:oxygen oxidoreductase EC 1.9.3.1) and rutamycin-sensitive adenosine triphosphatase (ATP phosphohydrolase EC 3.6.1.3) in cultured oocytes of the toad, Xenopus laevis. X. laevis cytochrome oxidase was purified over 23-fold with respect to specific activity and over 29-fold with respect to specific heme a content from oocyte submitochondrial particles. Polyacrylamide gel electrophoresis in the presence of sodium dodecyl sulfate separated the enzyme into six subunits with molecular weights of 44,000, 33,000, 23,000, 17,000, 12,000 and 9,500. the synthesis of the three larger subunits is sensitive to chloramphenicol (an inhibitor of mitochondrial protein synthesis), indicating that these subunits are made on mitochondrial ribosomes; the synthesis of the three smaller subunits is sensitive to cycloheximide (an inhibitor of cytoplasmic protein synthesis) and therefore occurs on cytoplasmic ribosomes. X. laevis rutamycin-sensitive ATPase, purified over 19-fold from oocyte submitochondrial pparticles, consists of 10 subunits with molecular weights of 56,000, 53,000, 41,000, 32,000, 29,000, 24,000, 21,000, 17,500 (2), and 11,500 on sodium dodecyl sulfate-polyacrylamide gels. The 29,000, 21,000, and one of the 17,500-dalton polypeptides are synthesized in the presence of cycloheximide and are, therefore, products of mitochondrial protein synthesis; the synthesis of the remaining seven subunits occurs in the presence of chloramphenicol, indicating that these subunits are made on cytoplasmic ribosomes. The synthesis of protein by mitochondria in cultured oocytes appears to be dependent upon cytoplasmic protein synthesis. In the presence of cycloheximide, the mitoribosomal synthesis of the subunits of cytochrome oxidase and rutamycin-sensitive ATPase is detectable only after a prior inhibition of mitochondrial protein synthesis by chloramphenicol. Oocyte mitochondrial ribosomes synthesize at least nine polypeptides after chloramphenicol treatment, three of which are components of neither cytochrome oxidase nor rutamycin-sensitive ATPase.

Adenosine Triphosphatases↗
PubMed1976

[Preternatural anus and its care (author's transl)].

The most careful surgical technique, the guiding principles of which are outlined, is a prerequisite for the subsequent possibilities for correct care of preternatural anus and for preventing otherwise unavoidable complications. Four different programs are available to us for care; truss pad, adhesive bag, irrigation therapy and the Erlanger magnetic closure. For prophylaxis of frequent hernias and prolapses, wearing a made-to-measure body binder is indispensable. Skin lesions, formerly feared concomitant symptoms, can now be prevented or eliminated as a result of the development of non-irritant adhesives, combinations with sterculia rings or adhesive plasters and differentiated skin care products. A more comprehensive organization of those with preternatural anus within the framework of the German Ilco and the establishment of preternatural anus clinics and therapists would be desirable.

Aftercare↗