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  • 1
    Electronic Resource
    Electronic Resource
    Organometallic fatty acid and phospholipid analogs synthesis and incorporation and detection in model membranes and biomembranes
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Biomembranes 506 (1978), S. 1-17 
    Details
    ISSN: 0005-2736
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0005-2736(78)90430-3
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  • 2
    Electronic Resource
    Electronic Resource
    The fine structure of the spermatozoa of two species of Rhacophorus (arboreus, schlegelii) - I. Phase-contrast microscope, scanning electron microscope, and cytochemical observations of the head piece
    Amsterdam : Elsevier
    Journal of Ultrastructure Research and Molecular Structure Research 96 (1986), S. 41-53 
    Details
    ISSN: 0889-1605
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0889-1605(86)90006-6
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  • 3
    Electronic Resource
    Electronic Resource
    Electron microscopic studies on the localization of sodium ions and sodium-potassium-activated adenosinetriphosphatase in chloride cells of eel gills
    Amsterdam : Elsevier
    Experimental Cell Research 59 (1970), S. 346-348 
    Details
    ISSN: 0014-4827
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0014-4827(70)90613-0
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  • 4
    Electronic Resource
    Electronic Resource
    Calcium transport mechanism in crayfish gastrolith epithelium correlated with the molting cycle (1984)
    Springer
    Histochemistry and cell biology 80 (1984), S. 213-217 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Periodical changes in Ca2+-ATPase and Mg2+-ATPase activity were observed cytochemically in the crayfish gastrolith epithelium during the molting cycle in relation to the calcium transport mechanism. The ATPase activity was demonstrated by a new one-step lead citrate method. The reaction products were mainly restricted to the matrix of type II cell mitochondria. The Ca2+-ATPase activity was intensely observed in two calcium moving stages, the small gastrolith period which indicates the beginning of gastrolith formation, and the aftermolt, when the calcified gastrolith has been dissolved in the stomach and then reabsorbed from the stomach epithelium into the newly formed soft exoskeleton through the blood. Although the intensity of reaction products of Mg2+-ATPase varied in each stage, the enzymatic activity was observed throughout all molting stages. Reaction products were observed in all mitochondria, basement membranes, apical cytoplasmic membranes, and in some lysosomes. In conclusion, periodical changes in the two types of ATPase activity were seen in the mitochondria of gastrolith epithelium during the molting cycle, but Ca2+-ATPase activity seemed to be more prominently synchronized to the calcium movement in the gastrolith epithelium than Mg2+-ATPase activity. These results provide the strong evidence that Ca2+-ATPase may act strongly in the calcium transport system of crayfish molting.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00495768
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  • 5
    Electronic Resource
    Electronic Resource
    Ultrastructural localization of acid protein polysaccharides and calcium in the vacuoles of the chicken thrombocyte (1977)
    Springer
    Histochemistry and cell biology 52 (1977), S. 25-32 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The coexistence of acid protein polysaccharides and calcium in the vacuoles of chicken thrombocytes were studied by means of ultrahistochemical methods and electron probe X-ray microanalysis. The thrombocytes possessed large vacuoles of a surface connected membrane system. After both ruthenium red staining and tannic acid fixation the innersurface coat of vacuoles was always strongly and continuously visualized. Electron microscopic X-ray microprobe analysis of antimonate precipitates in thrombocytes fixed in K-antimonate-OsO4 revealed calcium localization on the innersurface of vacuoles. From these facts it seems likely that the vacuoles of the surface connected membrane system may take part in the pool or the transport of calcium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00495811
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  • 6
    Electronic Resource
    Electronic Resource
    Ultrastructural localization of calcium around the membrane of the surface connected system in the human platelet (1978)
    Springer
    Histochemistry and cell biology 55 (1978), S. 271-279 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The localization of calcium in the membrane system of human platelets was determined by ultrahistochemical methods equipped with an electron probe x-ray microanalyzer. After potassium oxalate-glutaraldehyde treatment large amounts of electron opaque precipitates were observed around the membrane of the surface connected system. Electron probe x-ray microanalysis clearly defined that the precipitates were composed of calcium oxalate. The localization of calcium on the membrane of the surface connected system was also confirmed even after treatment of the platelets with potassium antimonate-OsO4. These results support a model which depicts the surface connected membrane system taking part in the store and the transport of calcium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00508795
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  • 7
    Electronic Resource
    Electronic Resource
    Elemental composition of the dense bodies of rat platelets determined by electron probe X-ray microanalysis of freeze-substituted sections (1983)
    Springer
    Histochemistry and cell biology 77 (1983), S. 329-337 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A semiquantitative x-ray microanalytical study was made of dense bodies in rat and human blood platelets prepared by freeze substitution. After the freeze substitution, electron dense bodies containing 5-hydroxytryptamine(5-HT) were well preserved. Electron probe x-ray microanalyses clearly defined species differences in the cations of dense bodies of rat and man. Direct calculation of elemental concentration ratios demonstrated a high level of Mg, with lesser amounts of K and Ca in rat, while there was a negligible level of Mg in man but a high amount of Ca. These results indicate that freeze-substitution is a suitable preparation for the study of diffusible electrolytes which may open the way to quantitative analysis using appropriate standards for analytical electron microscopy of resin sections.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00490896
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  • 8
    Electronic Resource
    Electronic Resource
    Ultrastructural localization of calcium in mechanoreceptors of the oral mucosa (1992)
    Springer
    Journal of neurocytology 21 (1992), S. 745-753 
    Details
    ISSN: 1573-7381
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Cytochemical localization of Ca2+ in Meissner corpuscles and Merkel cell-neurite complexes in the palatine mucosa of the Mongolian gerbil was studied by a combined oxalate antimonate-microwave irradiation procedure. The reaction products obtained were identified as calcium antimonate by EGTA solubility and X-ray microanalysis. Meissner corpuscles in the normal palatine rugae could be roughly classified into three types by amount and localization of Ca2+. Type I corpuscles were characterized by a high Ca2+ content in both the terminal axoplasm and caveolae of the lamellar plates, type II, by a low Ca2+ content in the terminal axoplasm and a high Ca2+ content in the lamellar cytoplasm. Type III corpuscles showed intermediate characteristics. Palatine rugae stimulated mechanically during fixation contained an increased number of type I corpuscles. On the other hand, two patterns were distinguished in the distribution of Ca2+ in Merkel cells in palatine rugae fixed under normal conditions. One showed abundant Ca2+ dispersed throughout the cell, while in the other, Ca2+ was specifically localized in the Golgi apparatus and mitochondria. Similar distribution patterns also were observed in palatine rugae that had received mechanical stimulus during fixation. Axon terminals of most Merkel cell-neurite complexes in normal palatine rugae were poor in axoplasmic Ca2+, whereas those in most Merkel cell-neurite complexes in mechanically stimulated palatine rugae contained abundant Ca2+ in their axoplasm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01181589
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  • 9
    Electronic Resource
    Electronic Resource
    The surface connected canalicular system of carp (Cyprinus carpio) thrombocytes: Its fine structure and three-dimensional architecture (1979)
    Springer
    Cell & tissue research 203 (1979), S. 355-365 
    Details
    ISSN: 1432-0878
    Keywords: Fish thrombocyte ; Open canalicular system ; Three-dimensional architecture ; High voltage electron microscopy ; Scanning electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The presence and the three dimensional distribution of the surface connected canalicular system (SCCS) in thrombocytes of a teleost, Cyprinus carpio, were studied using a transmission electron microscope, a high voltage electron microscope and a scanning electron microscope. When the specimens were fixed routinely in glutaraldehyde followed by osmium tetroxide, numerous electron lucent vesicles and canaliculi were distributed throughout the cytoplasm. As ruthenium red-positive reaction product was observed on the inner surface of the vesicles and canaliculi, these are defined as the SCCS of carp thrombocytes. In the stereo-pair of the photographs of thick sectioned specimens and the plastic reconstruction of serially sectioned thrombocytes, we succeeded in finding the whole structure of the SCCS which is composed of numerous anastomosing canaliculi. Scanning electron micrographs revealed many crater-like depressions throughout the cell surface which seem to be the openings of the SCCS.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00233264
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  • 10
    Electronic Resource
    Electronic Resource
    Fine structural distribution of the surface-connected canalicular system in frog thrombocytes (1979)
    Springer
    Cell & tissue research 201 (1979), S. 431-439 
    Details
    ISSN: 1432-0878
    Keywords: Frog thrombocyte ; Open canalicular system ; Glycocalyx ; Histochemistry ; High voltage electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The existence of the surface-connected canalicular system (SCCS) has been demonstrated in semithick sections of the frog thrombocytes by the use of a high voltage electron microscope. The SCCS of the thrombocytes in Rana catesbeiana and Rana nigromaculata consists of numerous canaliculi and vesicles with a diameter of 250 nm, which join with one another to make a complex network throughout the cytoplasm. Although the SCCS of Xenopus laevis fits well into the pattern described in Rana catesbeiana, the diameter of the canaliculi of the SCCS is about 500 nm. The results of this study suggest that the SCCS is a specific organelle of the thrombocyte system common to submammals and mammals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00237001
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