1. Beobachtungem &her d m Eflekt des elelctrischem B'eldes auf SpektraE24wiem. I . Quereflebt; vom J. S t a r k . I n h a l t : Q 1. Problem.fi 2. Verfahren zur Herstellung einee stdrken elektrischen Feldes in einem leuchtenden Gas. -9 3. Weitere Methoden. -Q 4. Der Effekt bei den Waeserstofflinien Hg und Hy. -8 5. Der Effekt im Heliumspektrum. - § 6. Abhiingigkeit des Effektes von der Feldstiirke. -8 7. Abhbgigkeit des Effektes von der Wellenllnge und der Serienzugehiirigkeit. -Q 8. Neue Aufgaben. 1) J. S t a r k , Die Atomionen chemischer Elemente und ihre Kanalstrahlenspektra. Verlag von J u l i u s S p r i n g e r , Berlin 1913.

No abstract

In 2011 all ECB publications feature a motif taken from the €100 banknote.

No abstract

In human placental villi the connective tissue is constructed by mesenchymal cells, small and large reticulum cells and fibroblasts. During early pregnancy mesenchymal cells dominate; starting with the third month of gestation the reticulum cells are in the majority within the terminal villi, the fibroblasts within the stem villi. Ultrastructurally intermediary types of cells can be differentiated. Together with reticular and collagenous fibres the reticulum cells form the basic architecture of the villous stroma during the first 2/3 of gestation: the "reticular type of stroma". This consists of a network of cells and fibres with fetal vessels fitted in between. The remaining interspaces form a fluid system of compartments in which Hofbauer cells are suspended. They are called stromal channels. During the last trimester these channels and the Hofbauer cells as well are progressively replaced either by voluminous masses of fibres ("fibrous type of stroma", mainly in the stem villi) or by sinusoidal enlargements of fetal capillaries ("sinusoidal type of stroma", mainly in the terminal villi).