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Electron microscopic studies on pigment granules in the substantia nigra and locus coeruleus of the Japanese monkey (Macaca fuscata yakui)
Springer Science and Business Media LLC - Tập 88 Số 2 - Trang 187-203 - 1968
Vergleichende morphologische und zytophotometrisch-autoradiographische Untersuchung der menschlichen Erythropoiese
Springer Science and Business Media LLC - Tập 116 - Trang 523-531 - 1971
Um die Abhängigkeit der erythropoietischen Zellformen von ihrer Stellung im Generationszyklus (G1, S und G2) zu untersuchen, wurde das Knochenmark von vier Normalpersonen mit der Kombination von zytophotometrischer DNS-Bestimmung (Feulgen-Photometrie) und autoradiographischer Technik mit 3H-TdR (in vitro) untersucht. Die Zellen wurden vor dieser Untersuchung in den nach Pappenheim gefärbten Ausstr...... hiện toàn bộ
Control of the pars intermedia of the lizard, Anolis carolinensis
Springer Science and Business Media LLC - Tập 198 - Trang 411-426 - 1979
The ultrastructure of the intermediate lobe of the hypophysis was studied in Anolis carolinensis with the use of a threefold aldehyde fixative. Lizards with a brown skin were selected. The possibility of two types of secretory cells is discussed; neither cell type is innervated. Type I cells are rarely found and contain dense granules approximately 0.3 μm in diameter; Type II cells vary widely in ...... hiện toàn bộ
Prolactin-like immunoreactivity in the granules of neural complex cells in the ascidian Halocynthia roretzi
Springer Science and Business Media LLC - Tập 289 - Trang 63-71 - 1997
Electron-microscopic studies of the neural complex (neural gland, dorsal strand, and cerebral ganglion) of an ascidian, Halocynthia roretzi, were performed, paying particular attention to the secretory systems. We found that cells scattered along the dorsal strand and neural cells in the cerebral ganglion contained electron-dense secretory granules of variable size. Immunoelectron-microscopic stud...... hiện toàn bộ
Differing postnatal development of the somatostatin- and luliberin- systems in the male and female rat
Springer Science and Business Media LLC - Tập 232 - Trang 357-378 - 1983
By means of light-microscopic immunohistochemistry the perikarya of the luliberin-(LRF-) and somatostatin systems of neonate rats were found to be in differing stages of development. At a time point when the LRF-producing neurons had obviously attained their final shape and size, the somatostatin-immunoreactive perikarya were still in a postnatal phase of maturation. Whereas the number of the latt...... hiện toàn bộ
Emigration of bilayered epidermal cell sheets from tadpole tails (Xenopus laevis)
Springer Science and Business Media LLC - Tập 266 - Trang 615-621 - 1991
Migration of bilayered epidermal cell sheets out of explants of tadpole tails (Xenopus laevis) were investigated with time-lapse cinemicrography using reflection-contrast optics. Cell-sheet formation begins beneath the explant in a region where it is closely attached to the coverslip. A single basal cell extends a lamellipodium through the outer (surface) epidermal layer and starts moving in a dir...... hiện toàn bộ
Ultrastructural changes in neurohaemal tissue of the stick insect, Carausius morosus, induced by the ionophores Br-X-537 A and A-23187
Springer Science and Business Media LLC - - 1979
The bridge-partitioning complex of germ-cell intercellular bridges in the testis of the golden hamster
Springer Science and Business Media LLC - Tập 281 - Trang 359-365 - 1995
The bridge-partitioning complex present in pre-existing intercellular bridges of dividing spermatogonia in the juvenile golden hamster testis was studied by electron microscopy. There is a close temporal adjustment in the appearance of this structure to those stages of mitosis during which the cells are without a nuclear membrane, i.e., the bridge-partitioning complex is formed at the transition b...... hiện toàn bộ
Pathways and fine structure of neurons forming the nervi corporis allati II of the cockroach Periplaneta americana (L.)
Springer Science and Business Media LLC - Tập 201 - Trang 227-237 - 1979
By back-filling the nervus corporis allati II (NCA2) with Co2+ and precipitating the sulfide, two groups of somata (A and B) are revealed on the ipsilateral side of the subesophageal ganglion (SG). These occur ante-roventrally, adjacent to the midsaggital plane. Group A consists of two cells; group B of five. Their processes form two discrete tracts issuing dorsoposteriorly into the neuropile betw...... hiện toàn bộ
Motility, linear arrangement and cell-to-cell contact of myogenic cells prior to fusion
Springer Science and Business Media LLC - Tập 206 - Trang 431-440 - 1980
Time-lapse cinematography elucidates the genesis of a uniform and approximately linearly arranged myogenic cell aggregate, stemming from two larger cell groups. The ultimate aggregate is created by continuous movement of one cell group toward the other. Following this motion, the angle between the cell groups is reduced as they approach each other. Different patterns of cell motility can be recogn...... hiện toàn bộ
Tổng số: 13,047
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