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Full-Text Articles in Life Sciences
Cochlear And Vestibular Epithelia From A Patient With Meniere's Disease: A Case Study, K. C. Horner
Cochlear And Vestibular Epithelia From A Patient With Meniere's Disease: A Case Study, K. C. Horner
Scanning Microscopy
Scanning electron microscopy observations were carried out on the cochlear and vestibular epithelia of the left temporal bone of a Meniere' s patient. There was almost complete absence of hair cells in the basal turn of the cochlea. The outer hair cells of the second turn presented an abnormal shortening of the shorter stereocilia within a tuft, reminiscent of the specific atrophy of the short and middle stereocilia in the ciliary tufts of outer hair cells in the guinea pig with experimental hydrops. The cilia of the inner hair cells showed fusion and giant cilia formation. Hair cells were observed …
Silicified Mississippian Paleosol Microstructures: Evidence For Ancient Microbial-Soil Associations, Ray Kenny, David H. Krinsley
Silicified Mississippian Paleosol Microstructures: Evidence For Ancient Microbial-Soil Associations, Ray Kenny, David H. Krinsley
Scanning Microscopy
Silica-replaced microfeatures in a well-developed, Upper Mississippian paleosol from north-central Arizona, were examined by scanning electron microscopy using back-scattered electron imagery. Preserved microfeatures include hollow and solid tubiform filaments and mycelium-like stringers which radiate from problematic (biogenic?) soil structures. Preservation of these features suggest that microstructures in the soil zone are not uniformly destroyed during post-diagenetic silica replacement and that biological soil symbionts may have occurred as early as the Upper Mississippian (~280 Mya).