scholarly journals Eighty-five day postexposure follow-up study in Fischer 344 rats after repeated exposures to methyl isocyanate vapor.

1987 ◽  
Vol 72 ◽  
pp. 125-132 ◽  
Author(s):  
E H Fowler ◽  
D E Dodd
Keyword(s):  
Methyl Isocyanate ◽  
Fischer 344 Rats ◽  
Fischer 344 ◽  
Follow Up Study

scholarly journals Effect of methyl isocyanate (MIC) gas on the eyes of Fischer 344 rats.

1987 ◽  
Vol 72 ◽  
pp. 105-108 ◽  
Author(s):  
B N Gupta ◽  
S A Stefanski ◽  
J R Bucher ◽  
L B Hall
Keyword(s):  
Methyl Isocyanate ◽  
Fischer 344 Rats ◽  
Fischer 344

scholarly journals Methyl isocyanate eight-day vapor inhalation study with Fischer 344 rats.

1987 ◽  
Vol 72 ◽  
pp. 117-123 ◽  
Author(s):  
D E Dodd ◽  
E H Fowler ◽  
W M Snellings ◽  
I M Pritts
Keyword(s):  
Methyl Isocyanate ◽  
Fischer 344 Rats ◽  
Inhalation Study ◽  
Fischer 344

Methyl Isocyanate Subchronic Vapor Inhalation Studies with Fischer 344 Rats

1986 ◽  
Vol 7 (3) ◽  
pp. 502-522
Author(s):  
DAROL E. DODD ◽  
EDWARD H. FOWLER
Keyword(s):  
Methyl Isocyanate ◽  
Fischer 344 Rats ◽  
Fischer 344

Electron Microscopy of Human Gallstones

1971 ◽  
Vol 29 ◽  
pp. 296-297
Author(s):  
C. Wolpers ◽  
R. Blaschke
Keyword(s):  
Electron Microscopy ◽  
Room Temperature ◽  
Bile Pigment ◽  
X Ray Diffraction ◽  
Triclinic Crystal System ◽  
X Ray ◽  
Follow Up Study ◽  
Infra Red ◽  
Main Components

Scanning microscopy was used to study the surface of human gallstones and the surface of fractures. The specimens were obtained by operation, washed with water, dried at room temperature and shadowcasted with carbon and aluminum. Most of the specimens belong to patients from a series of X-ray follow-up study, examined during the last twenty years. So it was possible to evaluate approximately the age of these gallstones and to get information on the intensity of growing and solving.Cholesterol, a group of bile pigment substances and different salts of calcium, are the main components of human gallstones. By X-ray diffraction technique, infra-red spectroscopy and by chemical analysis it was demonstrated that all three components can be found in any gallstone. In the presence of water cholesterol crystallizes in pane-like plates of the triclinic crystal system.

Toxic effects of inhaled DMMP on the kidneys of Fischer-344 rats

1987 ◽  
Vol 45 ◽  
pp. 880-881
Author(s):  
D.R. Mattie ◽  
C.J. Hixson
Keyword(s):  
Left Kidney ◽  
Inhalation Exposure ◽  
Electron Microscopic Examination ◽  
Exposure Period ◽  
Male Rats ◽  
Continuous Exposure ◽  
Fischer 344 Rats ◽  
Electron Microscopic ◽  
Thin Sections ◽  
Fischer 344

Dimethylmethylphosphonate (DMMP) is a simple organophosphate used industrially as a flame retardant and to lower viscosity in polyester and epoxy resins. The military considered the use of DMMP as a nerve gas simulant. Since military use of DMMP involved exposure by inhalation, there was a need for a subchronic inhalation exposure to DMMP to fully investigate its toxic potential.Male Fischer-344 rats were exposed to 25 ppm or 250 ppm DMMP vapor on a continuous basis for 90 days. An equal number of control rats were sham-exposed. Following the 90-day continuous exposure period, 15 male rats were sacrificed from each group. Two rats from each group had the left kidney perfused for electron microscopic examination. The kidneys were perfused from a height of 150 cm water with 1% glutaraldehyde in Sorensen's 0.1M phosphate buffer pH 7.2. An additional kidney was taken from a rat in each group and fixed by immersion in 2.5% glutaraldehyde and 2% paraformaldehyde in 0.1M cacodylate buffer pH 7.4. A portion of the 9 kidneys collected for electron microscopy were processed into Epon 812. Thin sections, stained with uranyl acetate and lead citrate, were examined with a JEOL 100B Transmission Electron Microscope. Microvilli height was measured on photographs of the cells of proximal tubules. This data, along with morphologic features of the cells, allows the proximal convoluted tubules (PCT) to be identified as being S1, S2, or S3 segment PCT.

Ultrastructure of rat alveolar macrophages activated in situ by poly:IC

1987 ◽  
Vol 45 ◽  
pp. 768-769
Author(s):  
A. M. Klinkner ◽  
R. A. Weiss ◽  
A. Kelley ◽  
P. J. Bugelski
Keyword(s):  
Venous Blood ◽  
Intratracheal Instillation ◽  
Buffy Coat ◽  
Fischer 344 Rats ◽  
Blood Monocytes ◽  
Fischer 344 ◽  
Polyinosinic:Polycytidylic Acid ◽  
Macrophage Activator ◽  
Endogenous Peroxidase

Polyinosinic:polycytidylic acid is an inducer of interferon and a macrophage activator. We have found that intratracheal instillation of polyI:C (IT-pI:C) activates rat bronchoalveolar lavage cells (BAL) for a variety of functions. Examination of Giemsa stained, cytocentrifuge preparations showed that IT-pI:C induced a population of BAL not seen in resident BAL. The morphology of these cells suggested that they might be derived from blood monocytes. To test this hypothesis we have examined several populations of macrophages that had been stained for endogenous peroxidase activity as a marker of cells derived from the monocyte-macrophage lineage.Macrophages were obtained from Fischer 344 rats. Peritoneal exudate cells (PEC) were collected by lavage 4 days after i.p. injection of 20 ml 3% thioglycolate. Buffy coat monocytes were separated from venous blood from naive rats.

A 10-year follow-up study of fixed metal ceramic prosthodontics

1997 ◽  
Vol 24 (10) ◽  
pp. 713-717 ◽  
Author(s):  
R. NAPANKANGAS ◽  
M.A.M. SALONEN ◽  
A.M. RAUSTIA
Keyword(s):  
Follow Up Study ◽  
Metal Ceramic
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