Post-mortem study of fractured surface of Cr12 blade used in a steam turbine

The freeze etching technique is potentially useful for examining dilute solutions or suspensions of macromolecular materials. Quick freezing of aqueous solutions in Freon or propane at or near liquid nitrogen temperature produces relatively large ice crystals and these crystals may damage the structures to be examined. Cryoprotective agents may reduce damage to the specimem, hut their use often results in the formation of a different set of specimem artifacts.In a study of the structure of polyethylene oxide gels glycerol and sucrose were used as cryoprotective agents. The experiments reported here show some of the structures which can appear when these cryoprotective agents are used.Figure 1 shows a fractured surface of a frozen 25% aqueous solution of sucrose. The branches of dendritic ice crystals surrounded hy ice-sucrose eutectic can be seen. When this fractured surface is etched the ice in the dendrites sublimes giving the type of structure shown in Figure 2. The ice-sucrose eutectic etches much more slowly. It is the smooth continuous structural constituent surrounding the branches of the dendrites.

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Ultrastructural investigation of an adenoma of the pituitary post mortem

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100127542 ◽

1987 ◽

Vol 45 ◽

pp. 622-623

Author(s):

Shirley Siew ◽

W. C. deMendonca

Keyword(s):

Deleterious Effect ◽

Anterior Lobe ◽

Definitive Diagnosis ◽

Pars Intermedia ◽

Post Mortem ◽

Close Apposition ◽

Autopsy Material ◽

Progressive Loss ◽

Transmission Electron ◽

Means Of Transmission

The deleterious effect of post mortem degeneration results in a progressive loss of ultrastructural detail. This had led to reluctance (if not refusal) to examine autopsy material by means of transmission electron microscopy. Nevertheless, Johannesen has drawn attention to the fact that a sufficient amount of significant features may be preserved in order to enable the establishment of a definitive diagnosis, even on “graveyard” tissue.Routine histopathology of the autopsy organs of a woman of 78 showed the presence of a well circumscribed adenoma in the anterior lobe of the pituitary. The lesion came into close apposition to the pars intermedia. Its architecture was more compact and less vascular than that of the anterior lobe. However, there was some grouping of the cells in relation to blood vessels. The cells tended to be smaller, with a higher nucleocytoplasmic ratio. The cytoplasm showed a paucity of granules. In some of the cells, it was eosinophilic.

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Rate of Sublimation of Ice by Radiative Heating in Freeze-Etching

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s1431927600002701 ◽

1980 ◽

Vol 38 ◽

pp. 618-619

Author(s):

Yeshayahu Talmon

Keyword(s):

Heat Flux ◽

Freeze Fracture ◽

Constant Heat Flux ◽

Radiative Heating ◽

Constant Heat ◽

Entire Sample ◽

Simplified Method ◽

Freeze Etching ◽

Sublimation Rates ◽

Fractured Surface

To bring out details in the fractured surface of a frozen sample in the freeze fracture/freeze-etch technique,the sample or part of it is warmed to enhance water sublimation.One way to do this is to raise the temperature of the entire sample to about -100°C to -90°C. In this case sublimation rates can be calculated by using plots such as Fig.1 (Talmon and Thomas),or by simplified formulae such as that given by Menold and Liittge. To achieve higher rates of sublimation without heating the entire sample a radiative heater can be used (Echlin et al.). In the present paper a simplified method for the calculation of the rates of sublimation under a constant heat flux F [W/m2] at the surface of the sample from a heater placed directly above the sample is described.

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Post-Mortem Review and Genetic Analysis of Sudden Unexpected Death in Epilepsy (SUDEP) Cases

Yearbook of Neurology and Neurosurgery ◽

10.1016/j.yneu.2011.04.011 ◽

2011 ◽

Vol 2011 ◽

pp. 42-43

Author(s):

M.J. Brodie

Keyword(s):

Genetic Analysis ◽

Sudden Unexpected Death ◽

Post Mortem ◽

Unexpected Death

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Post-mortem Peyer’s patches: Their potential application in forensic medicine

Immunopharmacology and Immunotoxicology ◽

10.1080/08923970902902437 ◽

2009 ◽

Vol 00 (00) ◽

pp. 090513010017019-7

Author(s):

Biagio Solarino ◽

Giancarlo Di Vella ◽

Thea Magrone ◽

Felicita Jirillo ◽

Angela Tafaro ◽

...

Keyword(s):

Forensic Medicine ◽

Potential Application ◽

Peyer's Patches ◽

Peyer’S Patches ◽

Post Mortem

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Aneurysms in the history of medicine

VASA ◽

10.1024/0301-1526.31.4.281 ◽

2002 ◽

Vol 31 (4) ◽

pp. 281-286 ◽

Cited By ~ 3

Author(s):

Bollinger ◽

Rüttimann

Keyword(s):

History Of Medicine ◽

Albert Einstein ◽

Thomas Mann ◽

Post Mortem ◽

John Hunter ◽

History Of

Die Geschichte des sackförmigen oder fusiformen Aneurysmas reicht in die Zeit der alten Ägypter, Byzantiner und Griechen zurück. Vesal 1557 und Harvey 1628 führten den Begriff in die moderne Medizin ein, indem sie bei je einem Patienten einen pulsierenden Tumor intra vitam feststellten und post mortem verifizierten. Weitere Eckpfeiler bildeten die Monographien von Lancisi und Scarpa im 18. bzw. beginnenden 19. Jahrhundert. Die erste wirksame Therapie bestand in der Kompression des Aneurysmasacks von außen, die zweite in der Arterienligatur, der John Hunter 1785 zum Durchbruch verhalf. Endoaneurysmoraphie (Matas) und Umhüllung mit Folien wurden breit angewendet, bevor Ultraschalldiagnostik und Bypass-Chirurgie Routineverfahren wurden und die Prognose dramatisch verbesserten. Die diagnostischen und therapeutischen Probleme in der Mitte des 20. Jahrhunderts werden anhand von zwei prominenten Patienten dargestellt, Albert Einstein und Thomas Mann, die beide im Jahr 1955 an einer Aneurysmaruptur verstarben.

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