Elektronenmikroskopische Differenzierung verschiedener Inselzelltypen im Pankreas normaler Albinoratten

New Views on the Identification of the Various Cell Types in the Pancreatic Islets of the Rat

“…These features agree with those reported by some authors [ Fuller, 1969: Bani Sacchi et al. 1982Perrier-Barta, 1983] but not with the findings of others, which described the a-granules either as dense granules with a fitting membrane [Caramia, 1963: Fuller, 1969Howell et al, 1969a] or as dense-cored granules with a less dense surrounding halo [Orci et al. Fig.…”

“…According to some of them, this halo is narrow [Logothetopulos, 1966;Orci et al, 1968;Howell et al. 1969a;Pictet and Rutter, 1972;Larsson et al, 1976;Kruse-Jarres, 1982], whereas others say it is considerably wider [Fuller, 1969;Bani Sacchi et al, 1982;Perrier-Barta, 1983]. Judging from the descrip tions given by some of the above-cited authors concern ing the comparison between the sizes of a-and (3-gran ules, and examining the figures shown in their papers and the relative magnifications, it seems that the sizes of the secretory granules in the cells designated as A cells vary too much from case to case.…”

“…Apart from A and B cells, a third cell type has been recognized in rat islets [Caramia, 1963;Fuller, 1969;Orci et al, 1973]. These cells were named D cells and characterized by moderately electron-opaque secretory granules with adhering limiting membranes.…”

Electron microscopy of the endocrine pancreas of cattle (<i>Bos taurus</i> L.)

“…The electron-micro scopic struct ure of the islets of Langerhansis similar to that described in other mammals [L acy, 1957a,b;Lacy and Cakdeza, 1958;Bjorkman et al, 1963a,b;Caramia et al, 1965;Logotiietopoulus, 1966;Sato et al, 1966;F ujita and Matsdno, 1967;Boqi ist, 1967;Monger, 1968Monger, ,1972F aller, 1969;PETicoveiaL, 1970;Deconinck et al, 1971].…”

Electron Microscopic Investigations on the Langerhans Islets of the Golden Hamster

“…8, 9). The reaction is The structure of the alpha granules in the golden hamster is similar to the alpha granules described in other mammals (LACY, 1957;BENCOSME and PEASE, 1958;CARA-MIA et al, 1965;YOKOH et al, 1965;GALLI and GUIDOTTI-LOLLI, 1966;FUJITA and MATSUNO, 1967;FALLER, 1969 The presence of rather more numerous and larger mitochondria in the B cells, the richness of the ergastoplasmic reticulum and the well developed Golgi complex imply that the B cells are in higher metabolitic activities in comparison with the A cells. These findings could be related to the fact that the B cells are richer in enzymes in comparison with the A cells PETKOV, 1965, 1966;WEGMANN et al, 1967;PETKOV et al, 1968).…”