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Ultrastructure of STH cells of the pars distalis of castrated male mice after hepatectomy (1973)

Echave Llanos, J. M. ; Gómez Dumm, C. L. A.

Springer

Cell & tissue research 144 (1973), S. 31-35

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ISSN: 1432-0878

Keywords: Pars distalis ; House ; STH cells ; Castration ; Hepatectomy ; Electron microscopy

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Medicine

Notes: Summary An electron microscopic study aimed at differentiation between “castration gonadotrophs” and “posthepatectomy STH cells” was performed on the pars distalis of the pituitary of castrated male mice, after partial hepatectomy. The ultrastructural features observed permit the distinction of both cell types. In the present experiments some remarkable ultrastructural changes, other than those described in a previous report, have been found in STH cells of hepatectomized mice with or without previous castration. Most of them contained masses of heterogeneous electron density, suggesting fusion of granules. These masses and some secretion granules were observed close to the plasma membrane, apparently in the process of discharging material into the pericapillary space. Granular extrusion was more frequent than normally. An increased number of lysosomes, probably related to the digestion of overproduced secretion material, was evident. The appearance of concentric lamellar formations might be related to an increase in cell movements. STH cells with severe cytoplasmic damage were also found, indicating an increased rate of cell loss.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00306684

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Binary alkali metal compounds with the zintl anions [Ge9]4- and [Sn9]4-Professor Welf Bronger zum 65. Geburtstag gewidmet (1997)

Von Schnering, H. G. ; Baitinger, M. ; Bolle, U. ; [et al.]

Weinheim : Wiley-Blackwell

Zeitschrift für anorganische Chemie 623 (1997), S. 1037-1039

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ISSN: 0044-2313

Keywords: Alkali metal germanides and stannides ; Zintl cluster anions ; Vibrational spectra ; Thermal decomposition ; Chemistry ; Inorganic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: The binary germanides M12Ge17 and M4Ge9 (M = Na, K, Rb, Cs) and the stannides M12Sn17 and M4Sn9 (M = K, Rb, Cs) were identified by a combination of direct synthesis, thermogravimetric analysis, vibrational spectroscopy, X-ray powder data and single crystal structure analysis. The M12E17 phases contain the cluster anions [E9]4- and [E4]4- in the ratio 1:2, forming a hierarchical structure with the cluster anions at the atomic positions of the hexagonal Laves phase MgZn2. Like the M4E4 phases, the M4Ge9 compounds are hierarchical derivatives of the cubic Cr3Si structure but with [Ge9]4- anions. The thermogravimetric analyses give strong evidence for the existence of at least one more phase with [E9]4- and [E4]4- clusters and of the clathrate phases M6E136 in addition to the well-known M8E44□2 chlathrates.

Additional Material: 3 Ill.