The mammalian pineal organ: Electron microscopic studies on the fine structure of pinealocytes, glial cells and on the perivascular compartment

1968 ◽  
Vol 86 (1) ◽  
pp. 74-97 ◽  
Author(s):  
Hubert Wartenberg
Keyword(s):  
Fine Structure ◽  
Glial Cells ◽  
Pineal Organ ◽  
Electron Microscopic ◽  
Microscopic Studies

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.

Electron microscope study on the glial filaments of astrocytes in the rat brain

1978 ◽  
Vol 36 (2) ◽  
pp. 618-619
Author(s):  
S. Mori ◽  
K. Furukawa ◽  
H. Abe
Keyword(s):  
Body Weight ◽  
Electron Microscope ◽  
Glial Cells ◽  
Microscope Study ◽  
Phosphate Buffer ◽  
Electron Microscope Study ◽  
Gold Chloride ◽  
Electron Microscopic ◽  
New Knowledge ◽  
Microscopic Studies

With the electron microscope, it was demonstrated that the glial filaments existed in astrocytes and could be impregnated by Cajal's gold chloride sublimate solution. By this conspicuous structure of glial filaments, thus, the astrocytes have long been differentiated from other glial cells from the classical light microscopic studies till the recent electron microscopic observations. Further investigations could add the new knowledge on this important component of glial cells in this laboratory that the actin- like filaments might be contained among the glial filaments. It will be shown in this report that glial filaments of astrocytes are consisted of the heterogenous groups of filaments, and some of them can bind with the heavy meromyosins (HMM).Normal rats (about 120 g body weight) were anesthetized with Nembutal and fixed by perfusion through the heart for 30 minutes with the fixative. This fluid was consisted of 3 % glutaraldehyde, 2 % paraformaldehyde, 4 % sucrose and 0. 5 mM CaCl2 in 0. 1 M phosphate buffer at PH 7. 4.

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.

scholarly journals GELS OF NORMAL AND SICKLED HEMOGLOBIN

1970 ◽  
Vol 131 (6) ◽  
pp. 1079-1092 ◽  
Author(s):  
James G. White ◽  
Beatrice Heagan
Keyword(s):  
Fine Structure ◽  
Molecular Assembly ◽  
Electron Microscopic ◽  
Microscopic Studies ◽  
Erythrocyte Sickling ◽  
Hexagonal Crystals ◽  
True Structure ◽  
Structural Arrangements

Electron microscopic studies of the sickling phenomenon have described at least three different structural arrangements of sickled hemoglobin, including empty hexagonal crystals, microtubules, and solid rods. It is unlikely that sickling results in several different polymers, and it is essential to determine the true structure of sickled hemoglobin in order to define the mechanism of molecular assembly. The present study has explored the fine structure of gels formed in cell-free solutions of normal and sickle reduced and oxyhemoglobin. Gels of reduced sickled hemoglobin consisted entirely of solid rods. The gels formed from sickle oxyhemoglobin, normal oxyhemoglobin, and normal reduced hemoglobin contained masses of hollow polymers essentially identical in appearance with microtubules. These findings indicate that solid rods are the characteristic polymers of sickled hemoglobin and tubular polymers represent aberrant structures which are not related to erythrocyte sickling.

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