Isolierung der tuberkulinaktiven Proteine aus dem Tuberkulin mit Hilfe von Dextran-Gel

Summary By filtering heated filtrates of the cultures ofMycobacterium tuberculosis human, bovine and avian type respectively through the dextran-gel Sephadex 50, it is possible to separate the tuberculoproteins from the other inactive constituents in a simple manner.     

Licht- und elektronenmikroskopische Befunde an den Geschmacksknospen der Axolotlzunge

Summary The investigation of the taste buds in the tongue of the neotene Mexican axolotl (Siredon mexicanum) by light and electron microscopy demonstrates 4 different cell types: 1) R-cells, marginal cells of less differentiated character. 2) G-cells, granulated cells in basal position. 3) Cells of type A with fibrills, vesicular elements, and dark bodies, showing supporting and secretory function. 4) Cells of type B with an agranular endoplasmic reticulum in stripe like arrangement, supposed to be receptor cells.     

Aerial and aquatic respiration of certain trochids

Résumé La consommation d'oxygène de 4 espèces de Troques dans l'air et dans l'eau est en relation avec leur distribution dans la zone intercotidale.

---

---

I thank ProfessorG. E. Newell for his advice.     

Rocket UV flash spectra from the solar eclipse of March 7, 1970

Flash spectra of the total solar eclipse throughout all its phases have been obtained in the extreme ultraviolet for the first time.