Results 221 to 230 of about 85,498 (248)
Some of the next articles are maybe not open access.
The ultrastructure of the ependymoblastoma
Acta Neuropathologica, 1986The ependymoblastoma is a rare, primitive neuroectodermal tumor morphologically distinct from the ependymoma and the malignant or anaplastic ependymoma. This neoplasm is characterized by uniform neuroepithelial cells, ependymoblastic rosettes, perivascular pseudorosettes and numerous mitotic figures. The fine structure of this neoplasm is characterized
openaire +2 more sources
Archives of Ophthalmology, 1969
Xanthelasma from both upper eyelids of a patient were examined by electron microscopy. The cytoplasm of the foam cells was filled with lipid droplets that were not bounded by a membrane. The lipid itself dissolved out during tissue preparation despite osmium or glutaraldehyde-osmium fixation, indicating that the lipid is highly unsaturated.
openaire +2 more sources
Xanthelasma from both upper eyelids of a patient were examined by electron microscopy. The cytoplasm of the foam cells was filled with lipid droplets that were not bounded by a membrane. The lipid itself dissolved out during tissue preparation despite osmium or glutaraldehyde-osmium fixation, indicating that the lipid is highly unsaturated.
openaire +2 more sources
The ultrastructure of pinealomas
Acta Neuropathologica, 1973Four pinealomas of the two-cell type (atypical teratomas) were investigated by electron microscopy. They all showed the same unique histological ultrastructure. The lymphocyte-like cells did not differ ultrastructurally from lymphocytes. Many plasma cells with well-developed rough surfaced endoplasmic reticulum were also seen.
K, Tabuchi, O, Yamada, A, Nishimoto
openaire +2 more sources
Journal of Ultrastructure Research, 1967
Guanophores in the back skin of the adult tree frog have been studied with an electron microscope. The cytoplasm is characterized by numerous needle- or platelet-like clear spaces which are incompletely surrounded by their own limiting membranes.
openaire +2 more sources
Guanophores in the back skin of the adult tree frog have been studied with an electron microscope. The cytoplasm is characterized by numerous needle- or platelet-like clear spaces which are incompletely surrounded by their own limiting membranes.
openaire +2 more sources
2018
Mammalian hair fibres can be structurally divided into three main components: a cuticle, cortex and sometimes a medulla. The cuticle consists of a thin layer of overlapping cells on the surface of the fibre, constituting around 10% of the total fibre weight. The cortex makes up the remaining 86-90% and is made up of axially aligned spindle-shaped cells
Jeffrey E, Plowman, Duane P, Harland
openaire +2 more sources
Mammalian hair fibres can be structurally divided into three main components: a cuticle, cortex and sometimes a medulla. The cuticle consists of a thin layer of overlapping cells on the surface of the fibre, constituting around 10% of the total fibre weight. The cortex makes up the remaining 86-90% and is made up of axially aligned spindle-shaped cells
Jeffrey E, Plowman, Duane P, Harland
openaire +2 more sources
Ultrastructure of dermatofibroma
Archiv f�r Dermatologische Forschung, 1973Eight dermatofibromas were studied by electron microscopy. The essential cell was the fibroblast, characterized by a well developed rough endoplasmic reticulum (RER), a distinct Golgi zone and large numbers of cytofilaments. The fibroblast of the dermatofibroma was engaged in collagen production and fat storage.
B, Mihatsch-Konz +2 more
openaire +2 more sources
Ultrastructure of a “Pineocytoma”
Journal of Neuropathology & Experimental Neurology, 1975The commonest pineal gland tumor, the germinoma, is more apparently related to germ cells than to pineal cells. Although ultrastructural studies of this tumor have confirmed this similarity, comparable characterization of a pineocytoma has not been reported, due to its rarity.
S L, Nielsen, C B, Wilson
openaire +2 more sources
The ultrastructure of chloroplasts
Experimental Cell Research, 19551. 1. On ultrathin sections of chloroplasts from Aspidistra elatior the electron microscopic study has revealed that the grana consist of layered columns. 2. 2. The grana are organized in double membrane discs the two membranes of which are about 65 A thick. These membranes bound a narrow, closed space the height of which also is about 65 A. The
E, STEINMANN, F S, SJOSTRAND
openaire +2 more sources
Ultrastructure of Oligodendrogliomas
1981The study of 18 oligodendrogliomas shows a number of characteristics which indicate a common hypothelial stem cell. The main cytologic characteristics are: a) high number of mitochondria, frequently atypical; b) polygonal crystalline structures in the cytoplasm in most of the tumors studied, and c) cytoplasmic microtubuli. None of these characteristics
J, Cervós-Navarro, N, Pehlivan
openaire +2 more sources
The ultrastructure of gonadoblastoma and dysgerminoma
Human Pathology, 1974Abstract A gonadoblastoma associated with dysgerminoma that occurred in the gonad of a 17 year old phenotypic female has been studied with the electron microscope. Ultrastructurally the nests of gonadoblastoma contain two cell types, namely, large vesicular cells and small epithelium-like cells.
K, Hou-Jensen, R L, Kempson
openaire +2 more sources