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  • 1
    Electronic Resource
    Electronic Resource
    Bauxite sur un atoll du Pacifique (1970)
    Springer
    Mineralium deposita 5 (1970), S. 181-183 
    Details
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Résumé L'Ile de Rennell dans l'archipel des Salomons offre un exemple remarquable d'un récif corallien circulaire, surélevé et constitué uniquement par du calcaire. L'île est couverte par une forêt tropicale dense. Un profil à travers l'île montre une crête côtière èlevèe de prés de 100m, à relief karstique, entourant une dépression centrale d'une quinzaine de mètres d'altitude dans laquelle s'accumulent les résidus de décalcification du karst avoisinant. Ces résidus sont formés par un sol rouge dépourvu de silice et constitués uniquement par de la gibbsite et des oxydes de fer, renfermant de faibles quantités de TiO2, P2O5 et MnO2, avea des traces d'un minéral radio-actif. L'île est une sorte de laboratoire géologique où s'élabore, par dissolution des calcaires récifaux fraîchement émergés, un sol résiduel constituant une véritable bauxite.
    Notes: Abstract Rennell, belonging to the Solomon Islands, is one of the finest examples of a raised atoll, composed entirely of coral limestone. The island is covered with a dense tropical forest. A transversal profile shows a coastal crest about 100 meters in height, which exhibits karst topography, surrounding a central depression with an altitude of 15 meters. Residue from dissolution of the limestone has accumulated in the depression and constitutes a red soil free of silica and composed solety of gibbsite and iron oxide, with small amounts of TiO2, P2O5 and MnO2, and with traces of radioactive elements. The island is a kind of geological laboratory in which bauxite is produced by dissolution of recently uplifted coral limestones.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00208061
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  • 2
    Electronic Resource
    Electronic Resource
    Sur la présence de nickel dans un gisement de bauxite près de Mégare (1967)
    Springer
    Mineralium deposita 2 (1967), S. 349-356 
    Details
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Résumé L'exploitation récente d'un gisement de bauxite près de Mégare (Grèce) a fait apparaître sur les calcaires de base une concentration verte d'oxyde de nickel relativement élevée. La présence dans le gisement d'argiles rouges, renfermant de fortes proportions d'oxyde de fer avec des teneurs relativement faibles en alumine et des traces d'oxyde de nickel, induit à penser qu'il s'agit d'un produit latéritique dérivé d'une roche ultrabasique et transporté ultérieurement sur la région calcaire karstifiée avec ses remplissages bauxitiques. L'étude se termine par une hypothèse sur la genèse de ce gîte singulier.
    Notes: Abstract The recent mining of a bauxite deposit near Megara (Greece) has shown on the footwall limestone a relatively high concentration of a green nickel oxide. The occurrence in the same deposit of red clays with a rather high percentage of iron oxide and a low content of alumina, together with some traces of nickel, induces to think that this material is composed of a lateritic soil derived from an ultrabasic rock and subsequently transported on karstified limestone with its bauxitic fillings. — The study ends with an hypothesis on the genesis of this unusual deposit.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00207026
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  • 3
    Electronic Resource
    Electronic Resource
    Expression of pyruvate kinase M2 in preneoplastic hepatic foci of N-nitrosomorpholine-treated rats (1999)
    Springer
    Virchows Archiv 434 (1999), S. 213-220 
    Details
    ISSN: 1432-2307
    Keywords: Key words Pyruvate kinase isoenzymes ; N-Nitrosomorpholine ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  The expression of the pyruvate kinase (PK) isoenzymes L and M2 was analysed in the livers of rats treated with the hepatocarcinogenic agent N-nitrosomorpholine (NNM) in the drinking water. In control animals L-PK expression was restricted to liver parenchymal cells, whereas M2-PK was detected in bile duct epithelial, blood vessel wall, endothelial and Kupffer cells. In rats treated with NNM proliferating oval cells were consistently L-PK negative and M2-PK positive, while the ductal cells of cholangiofibroses were clearly L-PK positive and coexpressed M2-PK. However, no morphological differentiation of ductal cells into hepatocyte-like cells was observed. In the clear and acidophilic cell foci storing glycogen in excess strong staining for L-PK was observed. In glycogen-poor foci induced by NNM a shift from L-PK to M2-PK expression takes place.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004280050330
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  • 4
    Electronic Resource
    Electronic Resource
    169. Experimentelle Untersuchungen mit Knochenzementen (1976)
    Springer
    Langenbeck's archives of surgery 342 (1976), S. 621-621 
    Details
    ISSN: 1435-2451
    Keywords: Hip ; Bone cement ; Embolism, fat ; Knochenzement ; Hüfte ; Fett ; Embolie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Durch das Einpressen von Knochenzement in den Markraum des Oberschenkelknochens, kommt es zu akuten Drucksteigerungen. Die Folge ist eine Mark- und Fettintravasation, welche zu einer mechanischen Blockade der Mikrozirkulation in der Lunge führt. Ebenso kommt es auch zum Übertritt von thromboplastischen Substanzen. Eine rechtsventrikuläre Ausflußblockade, die zum akuten Cor pulmonale führen kann, ist möglich. Als prophylaktische Maßnahme, Druckausgleich im Markraum durch Drainage und Sog, sowie die Anwendung eines natürlichen Proteinaseninhibitors Aprotinin zur Hemmung des Thrombocytensturzes wird empfohlen.
    Notes: Summary The pressing of bone cement into the medullary space of the femur causes acute presure increases. The consequence is a marrow and fat intravasation leading to mechanical blocking of the microcirculation in the lung, which also entails the transfer of thromboplastic substances. A ventricular obstruction of the outflow is possible. As a prophylactic measure, pressure compensation within the medullary space by means of drainage and suction is recommended, as is the application of the natural proteinase inhibitor aprotinin to prevent a fall in the platelet count.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01267517
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  • 5
    Electronic Resource
    Electronic Resource
    Biotinylated epidermal growth factor: a useful tool for the histochemical analysis of specific binding sites (1990)
    Springer
    Journal of molecular histology 22 (1990), S. 426-432 
    Details
    ISSN: 1573-6865
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Epidermal growth factor (EGF) was labelled with biotin via modification of either the amino or carboxyl groups, using suitable reagents, namely biotinyl-N-hydroxysuccinimide ester or biotinamidocaproyl hydrazide. To assure that the specific binding capacity of EGF is retained despite its chemical modification, displacement of the EGF by biotinylated derivatives in a routine binding assay was performed. The inhibitory potency compared to unmodified EGF was only slightly reduced. This result is the prerequisite for testing the usefulness of biotinylated EGF in histochemistry. The biotinylated probes were applied to sections of human tumour tissue and of monkey organs (liver, kidney, uterus of Cynomolgus and Rhesus monkey) to localize the specific binding sites for EGF. Formalin-fixed, paraffin-embedded tissue sections were deparaffinized and incubated with the probes at a concentration of 10 μg ml−1 at room temperature for 60 min. Specific binding of the EGF was visualized by the avidin-biotin techniques (ABC). A positive reaction in conjunction with appropriate controls by competitive inhibition was seen for all monkey tissue sections and for the following number of cancer cases: breast carcinoma: 7/10; mesothelioma: 2/4; lung carcinoma: 1/3; colon carcinoma: 1/3. The staining properties were similar for both types of probes that differed in the functional group that is involved in modification by biotion attachment. However, the batches with modification of the amino groups stained more intensely and more distinctly than the carboxyl modified EGF. Overall, the data indicate that the ligand properties of the EGF are not impaired by biotinylation of the two types of functional groups. Thus, biotinylated EGF is a useful tool for histochemical detection and identification of EGF specific binding sites in mammalian tissue.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01003462
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    Paper (German National Licenses)
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