Etude de l'hemocyanine d'un Crustacé décapodeCarcinus maenas Linné par dichroïsme circulaire naturel et dichroïsme circulaire magnétique

Summary The hemocyanin ofCarcinus maenas L. in the oxy, deoxy and apoforms is examined by CD and MCD. An interpretation of the results is given in relation to the problems raised by Cu–O² bond. The ration tyrosin/tryptophan is determined by treatment of spectra by computer.     

Elektronenmikroskopischer Vergleich menschlicher Iriskapillaren bei Glaucoma simplex und bei Katarakt

Résumé Dans les cellules endothéliales de capillaires iridiens de glaucomateux, on a constaté une diminution du volume des mitochondries, des vésicules micropinocytotiques et du nombre des ribosomes libres ainsi qu'un amincissement de la membrane basale. En revanche, ces cellules sont riches en corpuscules tubulaires «rod-shaped tubular bodies» deWeibel etPalade.     

The arrangement of sarcoplasmic reticulum in smooth muscle

Riassunto Nella muscolatura liscia di vari visceri e vasi viene osservato un notevole sviluppo del reticolo endoplasmatico. Esso è costituito da cisterne direttamente sottostanti la membrana plasmatica e le caveolae intracellulares.

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I thank Prof.J. Z. Young and Prof.E. G. Gray for discussion, and the Wellcome Trust for a fellowship.     

Einfluss des luftelektrischen Feldes auf das Haut-Potential vonRana esculenta

Summary The potential across the skin ofRana esculenta was remarkably reduced under Faraday conditions in comparison to animals kept under normal conditions. A pulsating electric field (10 Hz) practically abolished this effect.     

Chromosomal heteromorphism and female heterogamety in the marbled newtTriturus marmoratus (Latreille, 1800)

Riassunto Il bivalente lampbrush I diTriturus marmoratus è costituito da 2 cromosomi partner di diversa lunghezza a presenta loops eteromorfi lungo una regione sempre sprovvista di chiasmi. Si può quindi ritenere che tale bivalente sia costituito dagli eterocromosomi Z e W.

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With financial support by C.N.R., Rome.