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  • Articles  (6)
  • Articles: DFG German National Licenses  (6)
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  • Articles  (6)
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  • 1
    Electronic Resource
    Electronic Resource
    Beitrag zur biogenese des alpha-terthienyls
    Amsterdam : Elsevier
    Tetrahedron 24 (1968), S. 1899-1903 
    Details
    ISSN: 0040-4020
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0040-4020(01)82496-0
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  • 2
    Electronic Resource
    Electronic Resource
    Eine Methode zur Trockenfixation grossflächiger Kryostatschnitte (1971)
    Springer
    Cellular and molecular life sciences 27 (1971), S. 861-862 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary By exposure to formaldehyde vapor after freeze-drying large cryostat sections are brought into a stable form. These sections can be used for documentation and may be compared easily with autoradiograms made of the same slices. Furthermore, a method is shown of evaluating these sections with a thin-layer scanner and a 2π-flow counter, or by measuring quantitatively the radioactivity of single, excised organs or parts of tissues after automatic combustion by liquid scintillation counting.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02136915
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  • 3
    Electronic Resource
    Electronic Resource
    Variations of hemolymph proteins of the common shore crab Carcinus maenas after a bacterial infection (1985)
    Springer
    Marine biology 87 (1985), S. 181-183 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The influence of a bacterial infection in Carcinus maenas both generally and with specific respect to hemolymph proteins is described. The infection shows severe effects upon the moulting cycle and general activity. The total protein concentration remains constant. Qualitative and quantitative differences between healthy and infected crabs appear, however, after electrophoretical separation (Disc-PAGE), indicating the importance of this method as an analytical tool in animal disease research. The protein pattern of the diseased crabs shows two new protein components. The origin of these additional fractions is discussed. Moreover, the levels of most other proteins, which are identified as hemocyanin subunits and a nonrespiratory protein, are higher in diseased crabs, thus indicating an elevated metabolic rate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00539426
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  • 4
    Electronic Resource
    Electronic Resource
    Thallium determination in biological materials by radiochemical neutron activation analysis (1991)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 339 (1991), S. 245-248 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The determination of thallium in biological materials sometimes cause problems because of the low concentrations of this toxic element. In the present work a method is described which optimizes the parameters affecting the specificity and sensitivity of the radiochemical NAA of thallium in biological samples. High thermal neutron flux, complete decomposition of the organic matter by pressurized digestion, TlI precipitations, liquid extraction of HTlBr4 and La(OH)3 scavenging purification are the steps leading to the final homogeneous preparation of Tl2CrO4 for β-activity measurement. The method was applied to various materials as bovine liver, bone and nails. Good agreement was found between certified and determined thallium concentrations of the reference material CRM 176. The chemical yield comes to about 80%, with low deviations. The sensitivity of the method is about 10−3 μg/g, the standard deviations being in the range of 3.6% (CRM 176), 14% (bovine liver), and 17% (bone). Detailed working instructions are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00325746
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  • 5
    Electronic Resource
    Electronic Resource
    Aktivierungsanalytische Bestimmung von 28 Spurenelementen nach Vortrennung durch Flüssigkeitsextraktion und Fällung (1970)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 252 (1970), S. 358-366 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es wird über eine Methode zur aktivierungsanalytischen Bestimmung von 28 Elementen, die in organischem bzw. biologischem Material in geringen Konzentrationen vorkommen und deren (n, γ)-Produkte Halbwertzeiten 〉 10 h besitzen, berichtet. Die chemische Auftrennung der Elemente nach der Bestrahlung und nassen Veraschung erfolgt durch Füssigkeitsextraktion und Fällung; die chemischen Ausbeuten wurden an Standardgemischen ermittelt. Der Einfluß unterschiedlicher Neutronenflüsse wurde durch Kobalt-Sonden berücksichtigt. Die Aktivitätsmessung der Nuklide erfolgte durch Vielkanal-γ-Spektrometrie.
    Notes: Abstract A method is reported for the determination by activation analysis of 28 elements occurring in organic and biological material in small concentrations and exhibiting as (n, γ)-products of half-life times 〉 10 hours. After irradiation and wet combustion, chemical separation of the elements may be achieved by solvent extraction and precipitation; chemical yields were ascertained on standardized mixtures. The influence of varying neutron flux was taken into account by cobalt standards. Activity measurement was done by gamma-ray scintillation spectrometry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00424829
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  • 6
    Electronic Resource
    Electronic Resource
    Über die Reduktion von Chromoxyd mit Wasserstoff und festem Kohlenstoff (1937)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 234 (1937), S. 307-310 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wurden Reduktionsversuche an Chromoxyd und Chromoxyd -Eisen-Gemischen mit Wasserstoff und festem Kohlenstoff durchgeführt. Der praktische Reduktionsbeginn wurde bei der Reduktion mittels Wasserstoff und Kohlenstoff fur reines Chromoxyd zu etwa 1000°C gefunden, wahrend er bei Gegenwart von Eisen um etwa 150-200° erniedrigt wird.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19372340404
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