1,721,127 research outputs found
Cardiac valve calcification: new insights from ultrastructural and histochemical analysis, a lesson from "in vivo" models and new perspectives from "in vitro" models
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Localization of homologous sequences in type II collagen fibrils as proteoglycan binding sites
No full textVisualization and simulation of tissue specific "Bairati's bands GL" in glutaraldehyde-treated type II collagen fibrils
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Correlation between amino acid composition and ultrastructural features of type I and type II native collagen fibrils
No full textGlutaraldehyde-induced D-band pattern of type II collagen fibrils as revealed by negative staining
No full textA study was carried out on the negative staining band patterns (1% phosphotungstic acid (PTA) in phosphate buffer, 0.1 M, pH 7.4) exhibited by type II collagen fibrils after treatment with glutaraldehyde (5% in phosphate buffer 0.1 M, pH 7.4) and a comparison was made with the negative staining patterns of glutaraldehyde-fixed type I collagen fibrils. A characteristic D-band pattern was observed for type II collagen fibrils. The gap/overlap ratio was unusually low, with a 0.40 long gap zone and a 0.60 D overlap zone. This banding displayed eleven major light bands instead of the fifteen bands per period observed in the type I collagen patterns. On comparing the two types of microdensitograms, seven negative peaks (light bands) coincided and among them were the peaks corresponding to the N-terminal and C-terminal telopeptide regions. Although less numerous, the negative peaks of type II fibril traces were broader and more marked than those of type I microdensitograms and this feature accounts for the greater stain exclusion capacity of the type II fibrils. This is consistent with the larger quantity of hydroxylysines in type II collagen and, perhaps, with the more abundant hydroxyprolines
Two years' experience with a new multidisciplinary, integrated course on human development at the medical school of the University of Udine
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Contributo anatomico allo studio sulle varieta' delle formazioni fibrose nell'arto superiore dell'Uomo
No full textThe authors have examined an anatomical preparation of a human upper limb preserved in the Anatomical Museum in Bologna. The specimen was formed by bone, fibrous formations, musculus biceps brachii and musculus coracobrachialis. The soft parts were kept in situ and dried by mummification. The humerus showed abnormalities at its proximal extremity (Fig. 1) and the muscles displayed fibrous varieties: a) a fibrous sheet (Fig. 1, 2) connected the caput brevis of the musculus biceps brachii to the articular capsule of the shoulder joint; b) an aponevrosis (Fig. 1, 3) connected the musculus coracobrachialis to the same articular capsule and the humerus. These observations were discussed from an evolutionary and functional point of view
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