ELECTRON MICROSCOPIC STUDIES OF THE BRAIN OF SHEEP WITH NATURAL SCRAPIE: I. THE FINE STRUCTURE OF NEURONAL VACUOLATION

Brain ◽  
1972 ◽  
Vol 95 (2) ◽  
pp. 319-326 ◽  
Author(s):  
A. BIGNAMI ◽  
H. B. PARRY
Keyword(s):  
Fine Structure ◽  
Electron Microscopic ◽  
Microscopic Studies ◽  
Natural Scrapie ◽  
The Brain ◽  
Neuronal Vacuolation

scholarly journals 96. Electron Microscopic Studies of the Brain in Experimental Edema and Dehydration

1963 ◽  
Vol 5 (0) ◽  
pp. 121-121
Author(s):  
Junzo KOJZUMI ◽  
Katsuro TAKASHI ◽  
Kazuyuki YANO ◽  
Toshiko HOTTA ◽  
Yutaka MAKI ◽  
...  
Keyword(s):  
Electron Microscopic ◽  
Microscopic Studies ◽  
The Brain

Fine structure of Wolffia arrhiza

1973 ◽  
Vol 51 (9) ◽  
pp. 1619-1622 ◽  
Author(s):  
J. L. Anderson ◽  
W. W. Thomson ◽  
J. A. Swader
Keyword(s):  
Fine Structure ◽  
Cell Division ◽  
Vegetative Reproduction ◽  
Guard Cells ◽  
Epidermal Cells ◽  
Electron Microscopic ◽  
Meristematic Cells ◽  
Wolffia Arrhiza ◽  
Microscopic Studies

Light and electron microscopic studies of Wolffia arrhiza L. frond development during vegetative reproduction showed that the fronds were composed entirely of chlorenchymous cells. Chloroplasts in the epidermal cells other than the guard cells were unique in that they contained no starch. Cell division occurred only at the proximal end of daughter fronds early in their development. Meristematic cells contained chloroplasts with clearly defined grana. Proplastids, commonly observed in meristematic cells of apical regions of other plants, were absent in the cells of these plants.

scholarly journals Invasion of the brain by a cellular blue nevus of the scalp.A case report with light and electron microscopic studies

Cancer ◽  
1971 ◽  
Vol 27 (2) ◽  
pp. 349-355 ◽  
Author(s):  
Gerald D. Silverberg ◽  
Marshall E. Kadin ◽  
Ronald F. Dorfman ◽  
John W. Hanbery ◽  
Donald J. Prolo
Keyword(s):  
Case Report ◽  
Blue Nevus ◽  
Electron Microscopic ◽  
Microscopic Studies ◽  
The Brain ◽  
Cellular Blue Nevus

scholarly journals 6. Electron Microscopic Studies of Surface Fine Structure of Coated Papers (II)

1967 ◽  
Vol 21 (8) ◽  
pp. 444-450
Author(s):  
Rikizo Imamura ◽  
Akiyoshi Yamaoka ◽  
Shozo Maeda
Keyword(s):  
Fine Structure ◽  
Electron Microscopic ◽  
Coated Papers ◽  
Microscopic Studies

Fine Structural Analysis of Sarcoma-180 Tumor Before and After cis-Platinum (II) Diamminodichloride

1971 ◽  
Vol 29 ◽  
pp. 386-387
Author(s):  
S. K. Aggarwal ◽  
A. Sodhi ◽  
L. Van Camp
Keyword(s):  
Fine Structure ◽  
Structural Analysis ◽  
Single Injection ◽  
Sarcoma 180 ◽  
Electron Microscopic ◽  
Irreversible Damage ◽  
Before And After ◽  
Microscopic Studies ◽  
And Control ◽  
Tumor Implant

It has been shown that a single injection of 8.0 mg/kg of the cis (Pt(NH3)2cl2) in normal saline is effective in regressing solid Sarcoma-180 tumors in Swiss White mice, with no apparent irreversible damage to the host. Present investigations were undertaken to study the fine structure of Sarcoma-180 under experimental and control conditions. Platinum injections were made on day 10, (taking the tumor implant as day 0), and the animals were sacrificed at 2 day intervals for 12 days after the injections. The tissue from injected and uninjected animals was processed for electron microscopic studies.

The Microenvironment of Neurons

1970 ◽  
Vol 28 ◽  
pp. 136-137
Author(s):  
William Bondareff
Keyword(s):  
Electron Micrographs ◽  
Extracellular Space ◽  
Brain Volume ◽  
Freeze Substitution ◽  
Electron Microscopic ◽  
Morphological Studies ◽  
Microscopic Studies ◽  
Distribution Composition ◽  
And Function ◽  
The Brain

Neurons in the central nervous system are separated by extracellular spaces, the distribution, composition and function of which are not unequivocally known. Earlier electron microscopic studies of chemically-fixed tissues demonstrated extracellular spaces composed of uniformly narrow, apparently empty channels constituting 3-5% of the brain volume. The results of more recent morphological and non-morphological studies support the existence of less uniform intercellular channels, varying in dimension from 100 Å to almost 1 μ, and constituting 20-25% of the brain volume. Although this space is not revealed in electron micrographs of chemicallyfixed nervous tissues, it is demonstrated readily in specimens fixed by freeze-drying or freeze-substitution (Fig. 1). The dynamic nature of those extracellular spaces, as visualized in electron micrographs of nervous tissue fixed by freeze-substitution, was demonstrated in studies of normalbrain maturation. An extracellular space of 40% became gradually smaller as development proceeded to reach the smaller extracellular space characteristic of mature animals.

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