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  • 1980-1984  (9)
  • 1
    Electronic Resource
    Electronic Resource
    Histochemical and morphological characterization of reticular fibers (1980)
    Springer
    Histochemistry and cell biology 65 (1980), S. 131-141 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The results presented in this paper show that collagen fibers can be clearly distinguished from reticular fibers using the picrosirius-polarization method. A morphologic and morphometric study of these two types of fibers with electron microscopy shows that reticular fibers are characterized by the smaller diameter of their fibrillar components and the higher content of interfibrillar material, resulting in a loose arrangement of the fibrils. The evidences presented suggest that the amorphous matrix in which fibrils are embedded is responsible for the silver impregnation of reticular fibers. Our results show that the matrix of reticular fibers is characteristically rich in heparitin sulfate, and that the glycosaminoglycans present show a high interaction with the fibrillar component of these fibers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00493161
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Migrating mast cells in the gallbladder epithelium of cattle and sheep (1981)
    Springer
    Histochemistry and cell biology 72 (1981), S. 433-442 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary This paper reports the existence of mast cells in an epithelial location in the gallbladders of both cattle and sheep. The histochemical studies performed on these cells showed that their cytoplasmic granules contain heparin and biogenic amines in both species. Optical- and electron microscopic observations demonstrated that, in both species, mast cells from the connective tissue of the gallbladder diapedese across the basal lamina and migrate through the epithelium all the way to the luminal surface, and that a degranulation process takes place during this migration. The biochemical results showed a correlation between the number of mast cells present in the epithelium and the amount of heparin detected in the different regions of the gallbladders of the species studied. Unusually high contents of heparin were found in both cattle and sheep gallbladders, suggesting that they should be studied as possible commercial sources of this polimer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00501785
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Fine structure and histochemistry of the tail fin ray in teleosts (1982)
    Springer
    Histochemistry and cell biology 75 (1982), S. 363-376 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Ultrastructural and histochemical studies performed on the skeletal elements of the tail fins of six representative species of teleosts enabled the following observations to be made. The electron microscopic pattern of amorphous substance deposition, and the diameter of the collagen fibrils, in lepidotrichia closely resemble those which are typical of cartilage. In addition, lepidotrichia contain chondroitin sulfate AC as the only sulfated glycosaminoglycan, and this glycosaminoglycan shows high levels of interaction with collagen, both features being characteristic of cartilage. Furthermore, the histochemical data presented in this paper suggest that not all of the glycosaminoglycans present in lepidotrichia are bound to protein cores to form proteoglycans. Each actinotrichium consists of a single ultrastructural entity of remarkable width and, thus, is not composed of a bundle of discretely separated collagen fibrils but rather of hyperpolymerized collagen molecules. This aspect differs from the arrangement pattern of all the other interstitial collagens, suggesting that actinotrichia may contain a new type of collagen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00496739
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Histochemical and morphological characterization of migrating mast cells in the bovine gallbladder epithelium (1980)
    Springer
    Histochemistry and cell biology 68 (1980), S. 159-168 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary This paper reports the existence of granulated cells in the bovine gallbladder epithelium. The histochemical studies performed on these cells showed that their cytoplasmic granules contain heparin. Optical- and electron microscopic observations demonstrated that these mast cells migrated from the adjacent connective tissue, and crossed the basal membrane in order to enter the epithelium and reach the luminal surface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00489511
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    The influence of tissue section thickness on the study of collagen by the Picrosirius-polarization method (1982)
    Springer
    Histochemistry and cell biology 74 (1982), S. 153-156 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The influence of tissue section thickness on the color and intensity of birefringence displayed by collagen in tissue sections studied by means of the Picrosirius-polarization method, is reported in this paper. When dermal collagen sections of different thicknesses (ranging from 0.25 to 11 μm) were studied by this method, it became evident that not only did the intensity of birefringence increase proportionally to tissue section thickness, as was to be expected, but also a gradual shift in color from green through yellow to red could be observed as tissue section thickness increased. The limitations of the Picrosirius-polarization method for the localization of collagen types I, II, and III in routinely used histological slides is discussed, showing that this method is useful for the study of the distribution of the different types of interstitial collagen in normal adult vertebrate organs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00495061
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Dermal collagen distribution (1983)
    Springer
    Histochemistry and cell biology 79 (1983), S. 397-403 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Normal skin biopsy specimens obtained from 5 representative species of mammals, including man, were studied by the silver impregnation technique for reticulin fibers, by the histochemical Picrosirius-polarization method which is specific for collagen, and by transmission electron microscopy. The finely woven meshwork of argyrophilic reticulin fibers present in the adventitial dermis showed characteristics which are typical of collagen type III, when studied by aid of the Picrosirius-polarization method and by electron microscopy. On the other hand, the coarse collagen fibers of the deeper layers displayed ultrastructural and histochemical aspects which are characteristic of collagen type I. The foregoing observations support previous biochemical and immunohistologic findings, strongly suggesting that collagen type III is found mainly in the upper dermis while collagen type I predominates in the deeper layers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00491775
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Correlation of specific sulfated glycosaminoglycans with collagen types I, II, and III (1981)
    Springer
    Cell & tissue research 217 (1981), S. 171-175 
    Details
    ISSN: 1432-0878
    Keywords: Glycosaminoglycans ; Collagen ; Correlative analysis ; Biochemical assay
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A qualitative and quantitative biochemical study of the glycosaminoglycans was performed in tissues constituted predominantly by one type of collagen, or in tissues containing mixtures of different types of collagen. The results obtained show the presence of dermatan sulfate, chondroitin sulfate, and heparitin sulfate in tissues containing collagen types I, II, or III, respectively, suggesting a specific correlation of different glycosaminoglycans with these three types of collagen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00233835
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Evidence for collagen molecular orientation in basement membranes (1983)
    Springer
    Journal of molecular histology 15 (1983), S. 785-794 
    Details
    ISSN: 1573-6865
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The following basement membranes (BMs) from representative species of the main vertebrate classes were studied by the Picrosirius-polarization method: lens capsule, Reichert's membrane and glomerular BMs. A distinct birefringence was consistently observed in all BMs from all species studied by this method. The results reported provide a strong evidence for collagen macromolecular orientation in BMs. Heparitin sulphate was the only glycosaminoglycan detected in dog lens capsules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01003341
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Structure of the tail fin in teleosts (1983)
    Springer
    Cell & tissue research 230 (1983), S. 127-137 
    Details
    ISSN: 1432-0878
    Keywords: Tail fin ; Teleosts ; Actinotrichia ; Lepidotrichia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A morphologic study of the structure of the tail fin in eight species of teleosts was performed by aid of the Picrosirius-polarization method, which is a specific histochemical method for the detection of collagen in tissue sections. This structure is composed mainly of skeletal elements, the fin rays, covered by skin. Fin rays are bound to each other and to the surrounding tissues by a series of collagenous ligaments forming a complex, highly pliable and resistant structure. Although the general structural pattern of tail fins was consistent in all species studied, the comparative aspects reported in this paper show that variations in the form and size of their components are responsible for the morphologic diversities which are closely related to specific functional adaptations. Morphometric data on the number and size of actinotrichia in normal adult specimens are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00216033
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    Paper (German National Licenses)
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