scholarly journals ELECTRON MICROSCOPIC STUDY OF THE ATPASE ACTIVITY OF THE BAI STRAIN A (MYELOBLASTOSIS) AVIAN TUMOR VIRUS

1962 ◽  
Vol 15 (3) ◽  
pp. 451-462 ◽  
Author(s):  
Alex B. Novikoff ◽  
Guy de Thé ◽  
D. Beard ◽  
J. W. Beard
Keyword(s):  
Electron Microscopy ◽  
Plasma Membrane ◽  
Atpase Activity ◽  
Light Microscopy ◽  
Microscopic Study ◽  
Electron Microscopic Study ◽  
Frozen Sections ◽  
Electron Microscopic ◽  
Tumor Virus

Thymus glands of chicks with leukemia induced by BAI strain A (myeloblastosis) virus were fixed in cold 4 per cent formaldehyde-sucrose. Frozen sections were incubated in the ATPase medium of Wachstein and Meisel and studied by light microscopy and electron microscopy. The ATPase activity of the virus is localized to the outermost membrane of the virus. The membrane of the blast-like cells of the thymus cortex from which the virus emerges, by budding, also possesses such activity. It appears likely that the outermost membrane of the virus is derived from the plasma membrane of these cells.

scholarly journals Canine Cutaneous Histiocytoma A Light and Electron Microscopic Study

1970 ◽  
Vol 7 (1) ◽  
pp. 12-27 ◽  
Author(s):  
D. F. Kelly
Keyword(s):  
Electron Microscopy ◽  
Endoplasmic Reticulum ◽  
Plasma Membrane ◽  
Acid Phosphatase ◽  
Microscopic Study ◽  
Mononuclear Cell ◽  
Electron Microscopic Study ◽  
Light And Electron Microscopy ◽  
Perinuclear Region ◽  
Electron Microscopic

Cutaneous histiocytomas from 4 dogs were examined by light and electron microscopy. A large (up to 10 μ in diameter) mononuclear cell with prominent filiform processes of the plasma membrane predominated. Its cytoplasm contained relatively small amounts of endoplasmic reticulum and mitochondria, only occasional lysosomes, fibrils, most obvious in the perinuclear region, and small amounts of cytoplasmic debris. Acid phosphatase was not detected. Fibroblasts and collagen formed a small part of the lesion, except at the junction with surrounding dermis, where fibers were plentiful. The morphologic features of the lesion are compatible with the suggestion that the predominant cell is of histiocytic type.

Scanning Electron Microscopic Study of Adult Stored Product Beetle Elytra

1978 ◽  
Vol 61 (1) ◽  
pp. 76-87
Author(s):  
John E Kvenberg
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Light Microscopy ◽  
Microscopic Study ◽  
Electron Microscopic Study ◽  
Electron Microscopic ◽  
Scanning Electron Microscopic Study ◽  
Beetle Elytra ◽  
Scanning Electron Microscopic ◽  
Scanning Electron

Abstract Scanning electron microscopy was used to establish the microstructure of adult stored product beetle elytra. Twenty-three species of major importance, which commonly occur in food products, are illustrated. Micrographs and accompanying narrative descriptions provide a definitive diagnostic reference for the identification of elytral fragments examined by light microscopy.

Vesicular system associated with spermiogenesis of bullfrog

1987 ◽  
Vol 45 ◽  
pp. 818-819
Author(s):  
K. C. Liu ◽  
S. F. Tsay
Keyword(s):  
Electron Microscopy ◽  
Microscopic Study ◽  
Electron Microscopic Study ◽  
Reproductive System ◽  
Seminiferous Tubule ◽  
Rana Catesbeiana ◽  
Routine Procedure ◽  
Electron Microscopic ◽  
Twisted Tubules ◽  
Electron Lucent

In the histologic and electron microscopic study of the male reproductive system of bullfrog, Rana catesbeiana, a vesicular system associated with spermiogenesis was observed. It appeared in the lumenal space of the seminiferous tubule (Fig. 1), in the heads of spermatids (Fig. 2), associated with the chromatins of the spermatid (Fig. 4). As deduced from sections, this vesicular system consisted of vesicles of various size or a large group of waving and twisted tubules (Fig. 3), After routine procedure of treatment for electron microscopy, the lumens of both of the vesicles and tubules were electron lucent.In human, vesicles and vesicular system associated with reproductive cell and tissue were reported. In abnormal spermiogenesis, flower-like body, actually vesicles, and giant vesicle associated with the head of spermatid were observed. In both cases the number of vesicle was limited from a single one to a few.

scholarly journals Electron-microscopic study of measles virus in lymphocytes of affected children

1973 ◽  
Vol 71 (3) ◽  
pp. 447-451 ◽  
Author(s):  
H. K. Narang
Keyword(s):  
Electron Microscopy ◽  
Incubation Period ◽  
Microscopic Study ◽  
Cell Lines ◽  
Electron Microscopic Study ◽  
Inclusion Bodies ◽  
Measles Virus ◽  
Internal Diameter ◽  
Electron Microscopic ◽  
Different Types

SUMMARYTwo different types of inclusion bodies have been found by electron-microscopy in the cytoplasm of sectioned lymphocytes from children infected with measles.The first is tubular, 18 nm. internal diameter, embedded in osmiophilic material, and is found during the incubation period. It is not thought to be specific for measles, and is probably identical with structures recently reported in HEp-2 cell lines and tumour tissue.The second type is less obviously tubular and morphologically resembles measles nucleocapsid. This was found only after the rash had appeared.

An Electron Microscopic Study of Kidney Cells in the Lizard Treated with Mercuric Chloride

1982 ◽  
Vol 40 ◽  
pp. 60-61
Author(s):  
E. C. V. Ooi ◽  
E. C. Chew
Keyword(s):  
Electron Microscopy ◽  
Microscopic Study ◽  
Electron Microscopic Study ◽  
Mercuric Chloride ◽  
Kidney Cells ◽  
Electron Microscopic ◽  
Cellular Effects ◽  
Tissue Alterations

The nephrotoxicity of mercury is well established, especially in mammals and some fishes. However, no information on tissue alterations caused by mercurial compounds in reptiles is available. The present work was to study by using electron microscopy the cellular effects of mercury on kidney cells in the lizard, Gekko gekko. Twelve lizards were given single intraperitoneal injections of 12 mg/kg of mercuric chloride in saline. They were sacrificed after various intervals from 2 to 13 days. Four control animals received only saline injections.

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