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Ultrastructure of the nuclear membrane of a gregarine parasitic in grasshoppers.
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ELECTRON MICROSCOPE STUDIES ON THE CELLS OF THE MALPIGHIAN TUBULES OF THE GRASSHOPPER (ORTHOPTERA, ACRIDIDAE)
For purposes of description, the cells of the Malpighian tubules of the grasshopper may be divided into basal, intermediate, and apical zones. The basal zone of the cell contains what appears to beExpand
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Studies on the Fine Structure of a Gregarine Parasitic in the Gut of the Grasshopper, melanoplus differentialis*
SYNOPSIS. Materials within the endoplasm of both the protomerite and deutomerite may be displaced and stratified by ultracentrifugation. Animals are not killed by this treatment, and in time aExpand
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PHASE-CONTRAST AND ELECTRON MICROSCOPE STUDIES ON THE NEBENKERN, A MITOCHONDRIAL BODY IN THE SPERMATIDS OF THE GRASSHOPPER
Attempts to demonstrate a structure within mitochondria which might be come lated with their function have been the object of several investigations : (1 ) In the germ cells of certain insects theExpand
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Cardiac injury in the aged mouse: comparative ultrastructural effects of fission spectrum neutrons and gamma rays.
Late ultrastructural changes in the myocardium and myocardial microvasculature in the ${\rm B}6{\rm CF}_{1}$ mouse have been compared through 24 months following total-body exposure to fissionExpand
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An electron microscope study on the pharyngeal glands of the honeybee
The pharyngeal gland cells of the worker honeybee function as unicellular glands; each is possessed of a relatively long, sacculated and unbranched ductule. The ductule takes a sinuous course aroundExpand
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LIGHT AND ELECTRON MICROSCOPE STUDIES OF MORPHOLOGICAL CHANGES OF MITOCHONDRIA DURING SPERMATOGENESIS IN THE GRASSHOPPER
1. Observations on the morphological changes of mitochondria preparatory to the formation of the nebenkern, as well as changes within the nebenkern, are reported. 2. Mitochondria enlarge and divideExpand
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The Ciliature and Infraciliature of Nyctotherus ovalis Leidy
The structure of a cilium in Nyctotherus ovalis is that usually found: two single central filaments surrounded peripherally by nine double filaments; the whole is encased in a ciliary membraneExpand
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Phase-contrast and electron microscope studies on the dictyosome and acroblast (Golgi bodies) in the male germ cells of the cricket.
SYNOPSIS Electron micrographs of the dictyosomes and acroblasts of the male germ cells of the cricket reveal their ultramicroscopic structure to be comparable to that of the Golgi apparatus ofExpand
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THE INFLUENCE OF X-RAYS ON ORGANELLE INDUCTION AND DIFFERENTIATION IN GRASSHOPPER SPERMATOGENESIS
The effect of x-irradiation on grasshopper spermatogenesis was studied with the aid of light and electron microscopy. The insects were irradiated at the second instar prior to the presence ofExpand
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