ZIB

Treffer pro Seite

Treffer 1 - 2 | 2 Treffer

Sortierung

Digitale Medien

The anatomy of the median ocellus of Limulus (1971)

Jones, C. ; Nolte, J. ; Brown, J. E.

Springer

Cell & tissue research 118 (1971), S. 297-309

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1432-0878

Schlagwort(e): Median ocellus ; Limulus ; Fine structure

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie , Medizin

Notizen: Summary The median ocellus of Limulus consists of irregular groups of large photoreceptor cells which form a cup-shaped retina around the ocellar lens. Each group is surrounded and penetrated by guanophores and glia. The photoreceptor cells have extensive rhabdomeric regions, both along infoldings of cell membranes and between cells. Five-layered junctions occur between rhabdomeric microvilli. An occasional arhabdomeric (AR) cell is associated with a group of photoreceptors. Fine dendritic branches of the AR cell penetrate the rhabdomeric regions and form five-layered junctions with photoreceptor rhabdomeres. Axons of photoreceptor cells, and of at least some AR cells, gather at the proximal side of the cup to form an optic nerve.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00331188

Permalink

Bibliothek	Standort	Signatur	Band/Heft/Jahr	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

Digitale Medien

Gas-phase copolymerization of sulfur dioxide and butene-1 (1972)

Brown, J. R. ; O'Donnell, J. H.

New York : Wiley-Blackwell

Journal of Polymer Science Part A-1: Polymer Chemistry 10 (1972), S. 1997-2004

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0449-296X

Schlagwort(e): Physics ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: Mixtures of sulphur dioxide and butene-1 have been polymerized in the gas phase to the 1:1 alternating copolymer by electron irradiation. The rate of polymerization, measured by the decrease in gas pressure, decreased with increase in temperature over the range -20 to +30°C. The initial G(-monomer) values decreased from 500 to 50 giving an Arrhenius activation energy of -30 kJ mol-1. These results are consistent with a ceiling temperature-pressure relationship. The ceiling temperature is about 60°C lower than that observed previously in the liquid phase in accord with thermo-dynamic prediction.

Zusätzliches Material: 4 Ill.