Ceramide, triglyceride, and sterol ester in normal human whole brain at different ages

Lipids ◽  
1972 ◽  
Vol 7 (8) ◽  
pp. 561-563 ◽  
Author(s):  
George Rouser ◽  
Akira Yamamoto
Keyword(s):  
Sterol Ester ◽  
Whole Brain ◽  
Different Ages ◽  
Normal Human

Cytokeratin expression in normal human thymus at different ages

1997 ◽  
Vol 47 (12) ◽  
pp. 842-847 ◽  
Author(s):  
Atsuko Masunaga ◽  
Isamu Sugawara ◽  
Hisayoshi Nakamura ◽  
Tsuyoshi Yoshitake ◽  
Shinji Itoyama
Keyword(s):  
Human Thymus ◽  
Cytokeratin Expression ◽  
Different Ages ◽  
Normal Human

scholarly journals Cerebral Blood Flow with the Continuous Infusion of Oxygen-15-Labeled Water

1985 ◽  
Vol 5 (4) ◽  
pp. 566-575 ◽  
Author(s):  
S. C. Jones ◽  
J. H. Greenberg ◽  
R. Dann ◽  
G. D. Robinson ◽  
M. Kushner ◽  
...  
Keyword(s):  
White Matter ◽  
Continuous Infusion ◽  
Human Subjects ◽  
Recovery Coefficient ◽  
Whole Brain ◽  
Positron Emission ◽  
Arterial Concentration ◽  
Normal Human

This work describes the determination of CBF in eight normal human subjects with positron emission tomographic (PET) imaging using the continuous intravenous infusion of H215O. A whole-brain CBF model is described that permits the comparison of the CBF values determined using PET with those obtained using other methods. This model includes a correction for whole-brain recovery coefficient, a correction for the underestimation of flow due to the nonlinearity of the CBF model when considering tissue that includes both gray and white matter, the use of in vitro-determined brain–blood partition coefficients for gray and white matter, and a variation of the equilibrium model that permits the arterial concentration to vary. CBF values using this method compare well with values determined previously. Regional determinations using a brain overlay atlas are presented. Radiation dosimetry for the continuous infusion of H215O is also included.

Ultrastructural modification of cellular interactions in cancer tumor

1978 ◽  
Vol 36 (2) ◽  
pp. 318-319
Author(s):  
N. P. Dmitrieva
Keyword(s):  
Cancer Cells ◽  
Human Thyroid ◽  
Adjacent Cell ◽  
Main Role ◽  
Cellular Interactions ◽  
Electron Microscopic ◽  
Cancer Tumor ◽  
Normal Human ◽  
Characteristic Features

One of the most characteristic features of cancer cells is their ability to metastasia. It is suggested that the modifications of the structure and properties of cancer cells surfaces play the main role in this process. The present work was aimed at finding out what ultrastructural features apear in tumor in vivo which removal of individual cancer cells from the cell population can provide. For this purpose the cellular interactions in the normal human thyroid and cancer tumor of this gland electron microscopic were studied. The tissues were fixed in osmium tetroxide and were embedded in Araldite-Epon.In normal human thyroid the most common type of intercellular contacts was represented by simple junction formed by the parallelalignment of adjacent cell membranees leaving in between an intermembranes space 15-20 nm filled with electronlucid material (Fig. 1a). Sometimes in the basal part of cells dilatations of the intercellular space 40-50 nm wide were found (Fig. 1a). Here the cell surfaces may form single short microvilli.

Scanning Microscopy of Human Intestinal Explants in Organ Culture

1972 ◽  
Vol 30 ◽  
pp. 396-397
Author(s):  
Bruce Wetzel ◽  
Robert Buscho ◽  
Raphael Dolin
Keyword(s):  
Electron Microscopy ◽  
Room Temperature ◽  
Culture Conditions ◽  
Human Fetuses ◽  
Enteric Disease ◽  
Organ Cultures ◽  
Growth Of A Variety ◽  
Normal Human ◽  
Fetal Intestine ◽  
Scanning Electron

It has been reported that explants of human fetal intestine can be maintained in culture for up to 21 days in a viable condition and that these organ cultures support the growth of a variety of known viral agents responsible for enteric disease. Scanning electron microscopy (SEM) has been undertaken on several series of these explants to determine their appearance under routine culture conditions.Fresh specimens of jejunum obtained from normal human fetuses were washed, dissected into l-4mm pieces, and cultured in modified Leibowitz L-15 medium at 34° C as previously described. Serial specimens were fixed each day in 3% glutaraldehyde for 90 minutes at room temperature, rinsed, dehydrated, and dried by the CO2 critical point method in a Denton DCP-1 device. Specimens were attached to aluminum stubs with 3M transfer tape No. 465, and one sample on each stub was carefully rolled along the adhesive such that villi were broken off to expose their interiors.

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