Laminated Structure
Mostrando 25-31 de 31 artigos, teses e dissertações.
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25. Fine structure and morphogenesis of spironolactone bodies in the zona glomerulosa of the human adrenal cortex
Numerous spironolactone bodies have been detected in the zona glomerulosa cells of the adrenal cortex of a 36-year-old spironolactone-treated woman whose non-tumorous right adrenal gland was removed surgically because of primary hyperaldosteronism. Electron microscopy revealed spherical laminated whorls which consisted of a central core composed of an amorph
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26. Ultrastructural Changes Associated with Germination and Outgrowth of an Appendage-Bearing Clostridial Spore
The sequence of events occurring during the germination and outgrowth of appendage-bearing spores of Clostridium bifermentans was studied by phase-contrast and electron microscopy. The mature spore was characterized ultrastructurally as having the normal spore components as well as long tubular appendages which orginated from the surface of the spore coat. S
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27. Inhibition of tumor growth, vascularization, and collagenolysis in the rabbit cornea by medroxyprogesterone.
Medroxyprogesterone, dexamethasone, or cortisone, locally applied in sustained release polymer to rabbit V2 carcinoma implanted in the rabbit cornea, blocked neovascularization and three-dimensional growth of the tumor. These hormones similarly prevented the vascular proliferative response to implants in the rabbit cornea of mouse B-16 melanoma and also the
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28. Structural Properties and Features of Parasitic Bdellovibrio bacteriovorus
The structure of five parasitic strains of Bdellovibrio bacteriovorus was studied by electron microscope after negative staining and in shadow-case and etched freeze-fractured preparations. Special attention was paid to the cell wall and the flagellar sheath which is continuous with the wall or part of it. These structural components reveal distinct features
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29. Isolation and structure of the lipid envelopes from the nitrogen-fixing vesicles of Frankia sp. strain CpI1.
Frankia vesicles are differentiated during nitrogen starvation; they contain nitrogenase whether produced by free-living frankiae or by frankiae in actinorhizal root nodules. Vesicles are surrounded by envelopes of several monolayers of uncharacterized lipid. It has been suggested that the envelope limits diffusion of O2 into the vesicle cytoplasm, thereby p
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30. Self-assembled monolayers from a designed combinatorial library of de novo β-sheet proteins
A variety of naturally occurring biomaterials owe their unusual structural and mechanical properties to layers of β-sheet proteins laminated between layers of inorganic mineral. To explore the possibility of fabricating novel two-dimensional protein layers, we studied the self-assembly properties of de novo proteins from a designed combinatorial librar
The National Academy of Sciences.
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31. Ultrastructural Analysis During Germination and Outgrowth of Bacillus subtilis Spores
Electron microscopy of thin sections of dormant and germinating spores of Bacillus subtilis 168 revealed a progressive change in the structure of the cortex, outer spore coat, and inner spore coat. The initial changes were observed in the cortex region, which showed a loose fibrous network within 10 min of germination, and in the outer spore coat, which bega