The fine structure of developing elastic fibers in bovine ligamentum nuchae and rat flexor digital tendon was examined. Elastic fibers were found to contain two distinct morphologic components in sections stained with uranyl acetate and lead. These components are 100 A fibrils and a central, almost amorphous nonstaining area. During development, the first identifiable elastic fibers are compose...

Introduction: Prior qualitative and quantitative studies have reported morphological changes that occur in nerve fibers and non-neuronal cells of peripheral nerve during the lifetime of the rats. Previous studies suggest that Aloe Vera has some beneficial and therapeutic effects such as anti-oxidant effects. In the current study, we have evaluated histological and histomorphometric changes of Sc...

CASE REPORT A 9-year-old boy presented with multiple telangiectatic macular lesions since birth. Two telangiectatic macules, about 1 cm in diameter, were initially observed on the temples at birth, and then more and more similar lesions developed on the face, neck, trunk and extremities (Fig. 1). Physical examination revealed asymptomatic, scattered, oval, pinkish to erythematous telangiectatic...

background: histopathological diagnosis of lesions arising from the intake of tobacco is based on subjective evaluation of morphological alterations within the lesional tissue. oral exfoliative cytology is a non-invasive diagnostic technique for early detection of oral premalignant and malignant lesions. morphometric techniques have been advocated as objective and reproducible methods of detect...

PURPOSE This study evaluated the color stability of four stains of a light-cured porcelain stain system between the light-cured and fired stages. MATERIALS AND METHODS Thirty-six ceramometal discs 20 mm in diameter and 2 mm in thickness were cast to provide the substrate on which Ceramco II porcelain was applied. The porcelain was polished to a uniform thickness of 2 mm, and the samples were ...

We have examined the movements, composition, and cellular origin of phase-dense varicosities in cultures of chick sympathetic and sensory neurons. These organelles are variable in diameter (typically between 0.2 and 2 microns) and undergo saltatory movements both towards and away from the neuronal cell body. Their mean velocities vary inversely with the size of the organelle and are greater in ...