منابع مشابه
Localization of Permeability Barriers in the Frog Skin Epithelium
Ruthenium red and colloidal lanthanum were used to determine the site of the structural barriers to diffusion within the intercellular spaces of frog skin epithelium. Electron micrographs show that occluding zonules located at the outer border of the stratum corneum and at the outer layer of the stratum granulosum are true tight junctions since they are impermeable to these tracers. Measurement...
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Alterations in barrier function are associated with a number of skin diseases, including xerosis, atopic dermatitis, and psoriasis. Urea, a component of the natural moisturizing factor of the skin, plays an important role in the preservation of skin hydration and integrity. Several studies have investigated the effects of urea in the clinical setting. Here, we summarize the available clinical e...
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chapter i provides an overview of structural linguistics and touches upon the saussurean dichotomies with the final goal of exploring their relevance to the stylistic studies of literature. to provide evidence for the singificance of the study, chapter ii deals with the controversial issue of linguistics and literature, and presents opposing views which, at the same time, have been central to t...
15 صفحه اولPermeability of the Urinary Bladder to Urea and Sodium Chloride
There are few subjects in physiology that have a larger and more controversial literature than that of absorption from the urinary bladder. For the literature the papers of Garota (l), Hamburger (2), and the quite recent one of Mann and Magoun (3) may be consulted. We shall refer only to the more important communications dealing with the permeability for substances normally present in the urine.
متن کاملThe Frog Skin Potential
For many years the isolated surviving frog skin has been among the favorite objects of electrophysiologists and students of ion transport. This interest has turned out to be rather rewarding. Not only is the frog skin preparation interesting in its own rights, but there is mounting evidence that it can serve as a model system for the study of properties found in many epithelial and glandular ti...
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ژورنال
عنوان ژورنال: The Biological Bulletin
سال: 1927
ISSN: 0006-3185,1939-8697
DOI: 10.2307/1536849