Wasserhaushalt und Dickenwachstum von Kiefern in Abhängigkeit des Grundwasserflurabstandes

Water budget and annual ring growth of pines for different groundwater depth conditions Relation between annual ring width and water supply was examined for different groundwater depth in an old pine stand on a sandy soil. The quotient Ereal/Epot is a suitable parameter to quantify water stress. Multiple regression analyses were used to describe the dependence between annual ring width and water stress. Mean growth of basal area can be expressed by Ereal/Epot of the actual and previous year. This site specific function was used to quantify growth reduction affected by ground-water lowering for various soil conditions.     

Zur Lupenanatomie der klassischen Leberläppchen des Schweines

The natural division of the pig's liver into lobules was established at this stage without particular attention to the pattern of blood vessels—in order to explain missing relationships in the structure of the liver parenchyma. The results of the study, which diviate from what has been reported to date, enable us to give a first overview and make comparisons with histological sections.     

Das Blutgefäßsystem der Magenwand der Katze*

The blood vascular system of the stomach wall in the cat The results of 19 vascular-injections of the stomach wall in the cat are given. The arterial supply to the parietal surface is derived principally from the left gastric artery, that of the visceral surface from the short gastric branches of the splenic artery. Thus the arterial distribution is similar to the venous drainage. The blood supply of the tunica serosa and the tunica muscularis in the fornix and body regions arises from a common subserosal and muscular plexus. In the pyloric canal the blood supply arises from separate subserosal and intermuscular plexus. The submucosal plexus consists of both arteries and veins: from this, mucosal arteries ascend to a subglandular plexus and thence arterioles supply the capillary plexus of the lamina propria. Venules return the blood through collecting veins to a basal venous plexus, thence through mucosal veins to the submucosal plexus.     

Zur Frage der Umdifferenzierung der Knorpelzellen der Gelenkoberfläche am Beispiel der Synovialgrubenbildung*

It was shown both light and electronmicroscopically on cartilage of elbow and hock joints of calves and pigs that during formation of synovial fossae, fibrocytes and covering cells of the synovial layer can arise from chondrocytes.     

Eine Untersuchung der Frühentwicklung der heterozygoten Kurzschwanzmaus (T/+)*

A study of the early development of the heterozygous short-tail mouse (T/+) Because of the great variability during early development, it is recommended for age determination of mouse embryos to consider also features of growth; in the succeeding stages the somites and the three humps (Buckel) provide firm criteria. Since murine types differ from each other in certain features, there is no uniform conception of the kind and the form of the tissues that are affected in gene disturbances. In contrast to the current conception that in the t-mutant the disturbance arises primarily from the chorda dorsalis, the author's findings lead to the conclusion that the neural tube and the cardiovascular system are primarily involved. Chorda disturbances apparently occur in the so-called normal mouse similar to the way they occur in T/t-mutants. Because of the often observed connection between chorda and neural tube, it is possible that neurectoderm is involved in the formation of the chorda; and because of this anomalies of the neural tube in the heterozygous short-tail mouse gain significance. Mesodermal defects were rarely present in the T/t-mutant, while are very impressive in the early development of the short-tail mouse. They are thougth to be related to a rise in blood pressure occasioned by peripheral disturbance of blood flow.