Osmium tetroxide-zinc iodide reactive sites in the photoreceptor cells of the retina of the rat

1969 ◽  
Vol 101 (2) ◽  
pp. 203-211 ◽  
Author(s):  
Amanda Pellegrino Iraldi ◽  
Roberto Gueudet
Keyword(s):  
Osmium Tetroxide ◽  
Photoreceptor Cells ◽  
Zinc Iodide

Osmium tetroxide-zinc iodide reactive sites in the photoreceptor cells

1971 ◽  
Vol 11 ◽  
pp. 27-IN12 ◽  
Author(s):  
Amanda Pellegrino De Iraldi ◽  
Angela Maria Suburo
Keyword(s):  
Osmium Tetroxide ◽  
Photoreceptor Cells ◽  
Zinc Iodide

Cell Reactivity Pattern of the Guinea Pig Cecal Mucosa Evidenced by the ZIO Technique

1982 ◽  
Vol 40 ◽  
pp. 50-51
Author(s):  
Juan Mora-Galindo ◽  
Jorge Arauz-Contreras
Keyword(s):  
Guinea Pig ◽  
Phase Contrast ◽  
Osmium Tetroxide ◽  
Cell Types ◽  
Cell Reactivity ◽  
Transmission Electron ◽  
Neural Tissues ◽  
Maturation Stages ◽  
Zinc Iodide ◽  
Cecal Mucosa

The zinc iodide-osmium tetroxide (ZIO) technique is presently employed to study both, neural and non neural tissues. Precipitates depends on cell types and possibly cell metabol ism as well.Guinea pig cecal mucosa, already known to be composed of epithelium with cells at different maturation stages and lamina propria which i s formed by morphologically and functionally heterogeneous cell population, was studied to determine the pat tern of ZIO impregnation. For this, adult Guinea pg cecal mucosa was fixed with buffered 1.2 5% g 1 utara 1 dehyde before incubation with ZIO for 16 hours, a t 4°C in the dark. Further steps involved a quick sample dehydration in graded ethanols, embedding in Epon 812 and sectioning to observe the unstained material under a phase contrast light microscope (LM) and a transmission electron microscope (TEM).

Selective zinc iodide-osmium tetroxide impregnation of synaptoid vesicles in the rat neurohypophysis

1970 ◽  
Vol 22 (3) ◽  
pp. 402-405 ◽  
Author(s):  
C. Rufener ◽  
J.J. Dreifuss
Keyword(s):  
Osmium Tetroxide ◽  
Zinc Iodide

The differing effects of occipital and trunk somites on neural development in the chick embryo

Development ◽  
1987 ◽  
Vol 100 (3) ◽  
pp. 525-533 ◽  
Author(s):  
T.M. Lim ◽  
E.R. Lunn ◽  
R.J. Keynes ◽  
C.D. Stern
Keyword(s):  
Chick Embryo ◽  
Neural Crest ◽  
Neural Tube ◽  
Neural Development ◽  
Osmium Tetroxide ◽  
Local Property ◽  
Sensory Cells ◽  
Base Of The Skull ◽  
Atlas And Axis ◽  
Zinc Iodide

In all higher vertebrate embryos the sensory ganglia of the trunk develop adjacent to the neural tube, in the cranial halves of the somite-derived sclerotomes. It has been known for many years that ganglia do not develop in the most cranial (occipital) sclerotomes, caudal to the first somite. Here we have investigated whether this is due to craniocaudal variation in the neural tube or crest, or to an unusual property of the sclerotomes at occipital levels. Using the monoclonal antibody HNK-1 as a marker for neural crest cells in the chick embryo, we find that the crest does enter the cranial halves of the occipital sclerotomes. Furthermore, staining with zinc iodide/osmium tetroxide shows that some of these crest-derived cells sprout axons within these sclerotomes. By stage 23, however, no dorsal root ganglia are present within the five occipital sclerotomes, as assessed both by haematoxylin/eosin and zinc iodide/osmium tetroxide staining. Moreover, despite this loss of sensory cells, motor axons grow out in these segments, many of them later fasciculating to form the hypoglossal nerve. The sclerotomes remain visible until stages 27/28, when they dissociate to form the base of the skull and the atlas and axis vertebrae. After grafting occipital neural tube from quail donor embryos in place of trunk neural tube in host chick embryos, quail-derived ganglia do develop in the trunk sclerotomes. This shows that the failure of occipital ganglion development is not the result of some fixed local property of the neural crest or neural tube at occipital levels. We therefore suggest that in the chick embryo the cranial halves of the five occipital sclerotomes lack factors essential for normal sensory ganglion development, and that these factors are correspondingly present in all the more caudal sclerotomes.

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