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  • 1
    Electronic Resource
    Electronic Resource
    Geometrical Isomers of 3,6-Dimethyl-7-phenyl-2,4,6-heptatrienoic Acid (1962)
    s.l. : American Chemical Society
    The @journal of organic chemistry 27 (1962), S. 1991-1993 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo01053a017
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  • 2
    Electronic Resource
    Electronic Resource
    Congenital self-healing reticulohistiocytosis – A benign Langerhans cell disease (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cutaneous pathology 21 (1994), S. 0 
    Details
    ISSN: 1600-0560
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: An-11-day old girl was seen with brownish nodular lesions scattered over (he body with emphasis on the face and seal). Several lesions had started lo involute. Tissue was studied by histopathology, immunohistopathology, routine electron microscopy, and immuno-electron microscopy using cryosubstitution and embedding in K4M. Immunohistopathology revealed that the cells of the dermal infiltrate were Langerhans cells. They expressed Leu 6 and HLA-DR. On routine electron microscopy no Birbeck granules were (bund in the dermal cells. Birbeck granules in epidermal Langerhans cells were deformed and often situated next to laminated dense bodies. The latter expressed Leu 6 and HLA-DR. on immuno-electron microscopy. It was concluded that congenital self-healing reticulohistiocytosis is a benign Langerhans cell disease in which Birbeck granules are transformed to laminated dense bodies and possibly degraded by lysosomal enzymes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0560.1994.tb00692.x
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  • 3
    Electronic Resource
    Electronic Resource
    Techniques in immuno-electron microscopy (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cutaneous pathology 21 (1994), S. 0 
    Details
    ISSN: 1600-0560
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Normal skin was cryoprotected by submerging it in a mixture of 30% dimethylformamide (DMF) in PBS or RPMI. Subsequently it was frozen in liquid propane gas. Cryosubstitution was carried out at −90°C by using methanol to which uranyl acetate or osmium tetroxide were added. The tissue was embedded in either Lowicryl K4M at −40°C or in Epon at +60°C. The- tissue was evaluated by its overall preservation of ultras-tructural details and by its labeling intensity alter incubation with either anti-clesmoglein or anti-type VII collagen monoclonal antibodies. The mixture of DMF and PBS caused an electron-dense precipitate within the cell. The overall morphology was better in Epon-embedded material than in K4M-embedclecl material. However, the labeling was best in K4M material. Regardless of whether the tissue was embedded in Epon or K4M, the addition of osmium tetroxide markedly reduced the degree of labeling.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0560.1994.tb00708.x
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  • 4
    Electronic Resource
    Electronic Resource
    Ultrastructural localization of lectin binding sites in human melanocytes (1990)
    Springer
    Archives of dermatological research 282 (1990), S. 520-525 
    Details
    ISSN: 1432-069X
    Keywords: Lectins ; Carbohydrates ; Epidermis ; Melanocytes ; Immunoelectronmicroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The ultrastructural localization of carbohydrate residues in human melanocytes of normal epidermis and of one compound naevus was studied. The following lectins were used in a post-embedding technique: 1. peanut agglutinin (PNA), which reacts specifically with N-acetyl-galactosamine; 2. Concanavalia ensiformis (Con A) indicating α-d-glucose and α-d-mannose binding sites; 3. Ulex europaeus agglutinin (UEA I) specific for α-l-fucose; 4. Wheat germ agglutinin (WGA), reacting specifically with N-acetyl-glucosamine and neuraminic acid (sialic acid); and 5. Limax flavus agglutinin (LFA), also specific for sialic acid (Neu5Ac-α-2,3-Gal and Neu5Ac-α-2,6-Gal). When incubated with WGA, Con A and LFA strong labelling was seen within the cytoplasm and in the plasma membrane of melanocytes, whereas incubations with PNA and UEA I revealed an occasional gold particle only. The determination of the distribution of carbohydrate residues in normal melanocytes is a prerequisite for future studies of abnormal melanocytes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00371947
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  • 5
    Electronic Resource
    Electronic Resource
    Untersuchungen an Metallkatalysatoren. IVorbericht: Z. anorg. allg. Chem. 403, 353 (1974). Strukturelle und katalytische Untersuchungen an pulverförmigen Palladium-Silber-LegierungenProfessor Günther Rienäcker zum 70. Geburtstage am 13. Mai 1974 gewidmet (1974)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 405 (1974), S. 239-249 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Investigations on Metal Catalysts. I. Structural and Catalytical Investigations on Palladium-Silver PowdersSeveral conditions for preparation of palladium-silver powders are described. By choice of suitable preparation metal crystallites were obtained, in which exists a gradient of concentration with respect to the metals. This gradient determines the behaviour of sorption and catalytical activity, respectively.Characterization of catalysts with regard to their structure takes place by means of X-ray measurements and investigations of sorption (adsorption of N2, chemisorption of CO, sorption of H2), respectively. The catalytical activity of alloys has been measured by means of hydrogenation of benzene.
    Notes: Es werden verschiedene Präparationsbedingungen pulverförmiger Pd-Ag-Katalysatoren beschrieben. Durch Wahl geeigneter Herstellungsverfahren läßt sich in den Metallkristalliten ein Konzentrationsgradient erzeugen, der das Sorptionsverhalten der Legierungen sowie ihre katalytische Aktivität bestimmt.Die Charakterisierung der Proben erfolgte durch Röntgenuntersuchungen sowie Sorptionsmessungen (N2-Adsorption, CO-Chemisorption, Wasserstoffsorption); das katalytische Verhalten der Legierungen wurde mittels der Benzolhydrierung ermittelt.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19744050304
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  • 6
    Electronic Resource
    Electronic Resource
    Herstellung und Eigenschaften von geformtem Aluminiumoxid. II. Einfluß der mechanischen Zerkleinerung gefällten Böhmithydrogels auf die Porenstruktur und die Abriebfestigkeit des geformten Aluminumoxids (1990)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 580 (1990), S. 207-216 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation and Properties of Formed Aluminium Oxide. II. Influence of the Mechanical Comminution of Precipitated Boehmite Hydrogel on the Pore Structure and Abrasion Resistance of the Aluminium OxideA report is given on the physical-chemical characteristics of formed aluminium oxide on the basis of boehmite which had been continuously precipitated with nitric acid from sodium aluminate solution, subsequently filtrated, dried at 110°C and ground prior to moulding.In double dependence on the grinding intensity (type of mill, grinding time) and on the precipitation conditions (pH value, temperature) the changes of the morphology and the texture of the boehmite hydrogel are investigated. According to the particles constituting the precipitated boehmite hydrogel is made in two stages. In dependence on the grinding intensity a maximum correlation is observed for the abrasion resistance.
    Notes: Es wird über die physikalisch-chemischen Charakteristika von geformtem Aluminiumoxid auf Basis von Böhmit berichtet, der aus Natriumaluminatlösung mit Salpetersäure kontinuierlich gefällt, nach Filtrieren bei 110deg;C getrocknet und vor der Formgebung gemahlen wurde. In zweifacher Abhängigkeit von der Mahlintensität und den Fällbedingungen werden die Veränderungen der Morphologie und Textur des Böhmithydrogels untersucht. Dem Dualismus in der Morphologie entsprechend erfolgt die Zerkleinerung der das gefällte Böhmithydrogel konstituierenden Teilchen zweistufig. Bei der Abriebfestigkeit des geformten Aluminiumoxids wird für die Abhängigkeit von der Mahlintensität eine Maximumbeziehung beobachtet.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19905800125
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