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  • 1
    Electronic Resource
    Electronic Resource
    The dynamic stabilization of the Rayleigh-Taylor instability and the corresponding dynamic equilibrium (1969)
    Springer
    The European physical journal 227 (1969), S. 291-300 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Conditions are derived for dynamically stabilizing the Rayleigh-Taylor instability of a fluid interface and for attaining the corresponding dynamic equilibrium. These conditions could be proved in experiments using an aqueous solution of Potassium Jodide (ρ h=1.6 g/cm3) as the heavy fluid and oil (viscosity SAE 140,ρ ι =0.9 g/cm3) as the light one. Parametric resonances were suppressed, but could be observed using oil of lower viscosity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01397662
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  • 2
    Electronic Resource
    Electronic Resource
    Nachweis pflanzlicher Ribonukleasen in Polyacrylamid-Gelen nach Disk-Elektrophorese (1968)
    Springer
    Cellular and molecular life sciences 24 (1968), S. 890-891 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Detection of ribonucleases in polyacrylamide gels after disc-electrophoresis is possible by incubation of the gels in a solution of low molecular RNA followed by staining with methylene blue. Application of this method to protein extracts of wheat leaves, sugar beet leaves and roots of different bean varieties as well as callus cultures and roots of the same bean variety shows differences in number and position of RNase zones.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02138632
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  • 3
    Electronic Resource
    Electronic Resource
    A Biologically Active Metabolite of Vitamin A and Vitamin A Acid (1964)
    [s.l.] : Nature Publishing Group
    Nature 203 (1964), S. 410-412 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Circumstantial evidence has for long suggested2 that retinol is changed into an 'active form' in the course of its metabolic function. When the vitamin A-like activity of retinoic acid was discovered by Dowling and Wald3, this acid was at first considered to be the 'active form'. However, it could ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/203410b0
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  • 4
    Electronic Resource
    Electronic Resource
    Polarisationsoptische Eigenschaften des Reissnerschen Fadens (1967)
    Springer
    Naturwissenschaften 54 (1967), S. 495-495 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00702520
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  • 5
    Electronic Resource
    Electronic Resource
    Vorkommen und Funktion der Sialinsäure im Reissnerschen Faden (1969)
    Springer
    Histochemistry and cell biology 17 (1969), S. 57-63 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung Im Reissnerschen Faden des Rindes konnte durch histochemische und biochemische Untersuchungen Sialinsäure nachgewiesen werden. Der Sialinsäuregehalt beträgt ca. 3,2% der Trockensubstanz. Es wird für möglich gehalten, daß der Reissnersche Faden im Sinne eines Kationenaustauschers eine puffernde Wirkung auf Konzentrations-änderungen von biogenen Aminen im Liquor hat.
    Notes: Summary Histochemical and biochemical studies have demonstrated the occurrence of sialic acid in the Reissner's fibre of the ox. The content of sialic acid is about 3,2% related to dry substance. It is just possible that by cation-exchange the fibre balances the concentration of biogenic amines in the cerebrospinal fluid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00306330
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  • 6
    Electronic Resource
    Electronic Resource
    Book reviews (1969)
    Springer
    Theoretical and applied genetics 39 (1969), S. 290-294 
    Details
    ISSN: 1432-2242
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00275011
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  • 7
    Electronic Resource
    Electronic Resource
    On the incorporation of32P into the various nucleic acid fractions of rust-infected primary leaves of wheat (1968)
    Springer
    European journal of plant pathology 74 (1968), S. 19-23 
    Details
    ISSN: 1573-8469
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Samenvatting 32P, gedurende 2 uur toegediend aan tarwe vlak voor inoculatie met zwarte graanroest, en 2 respectivelijk 4 dagen later geëxtraheerd, werd gedeltelijk geïncorporeerd in hoogmoleculair RNA; de specifieke activiteit van deze fractie was hoger in geïnoculeerde bladeren dan in gezonde. Indien32P gedurende 11/2 uur werd toegediend 2en 4 dagen na inoculatie en onmiddellijk daarna geëxtraheerd, werden grote hoeveelhden32P geïncorporeerd in een polyfosfaatfractie. Ook in dit geval was de specifieke activiteit van deze fractie in geïnoculeerde bladeren hoger dan in gezonde bladeren. De polyfosfaatfractie kon niet met een duidelijke RNA-fractie in verband gebracht worden; evenmin kon boodschapper-RNA in andere fracties worden aangetoond.
    Notes: Abstract 32P administered to wheat plants for 2 h just before inoculation with stem rust, and extracted from the primary leaves 2 and 4 days later, was partly incorporated in highmolecular RNA; the specific activity of this fraction in rust-infected leaves was significantly higher than that in healthy leaves. When administered for 1 1/2 h 2 and 4 days after inoculation and extracted immediately thereafter, large amounts of32P were incorporated in a polyphosphate fraction; also in this case the specific activity of this fraction was significantly higher in rustinfected leaves than in healthy leaves. It could not be associated with a distinct RNA fraction, nor could short-living m-RNA be detected in other fractions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01977509
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  • 8
    Electronic Resource
    Electronic Resource
    Untersuchungen zur Ultrastruktur des Rattenherz-Muskels mit Besonderer Berücksichtigung des Sarcoplasmatischen Retikulums (1966)
    Springer
    Cell & tissue research 72 (1966), S. 249-275 
    Details
    ISSN: 1432-0878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung Die Ultrastruktur des Rattenherzmuskels (rechter Ventrikel) wurde unter besonderer Berücksichtigung des sarcoplasmatischen Retikulums untersucht. Dabei konnten nach verschiedenen üblichen elektronenmikroskopischen Präparationsverfahren sowie durch Anwendung von Ferritin als Tracersubstanz und Interpretation von Serienschnitten folgende Befunde erhoben werden: 1. Das sarcoplasmatische Retikulum besteht aus einem transversalen tubulären System (T-System) und einem longitudinalen tubulären System (L-System). 2. Das T-System ist aus sich verzweigenden und anastomosierenden Kanälchen aufgebaut, die mit dem Extracellulärraum frei in Verbindung stehen. Die Zellmembran (inneres Sarcolemm) geht kontinuierlich in die Membran der T-Tubuli über. Die Basalmembran (äußeres Sarcolemm) setzt sich bis in die Tiefe der Zelle fort, indem sie den Einstülpungen der Zellmembran folgt. Manche T-Tubuli können über kurze Strecken einen longitudinalen Verlauf einschlagen. 3. Es wurden Befunde gewonnen, aus denen hervorgeht, daß Teile des L-Systems zum T-System hin geöffnet sein könnten, wobei die Frage diskutiert wird, inwieweit in bestimmten Fällen mit den angewandten Methoden überhaupt eine sichere Unterscheidung von T- und L-System möglich ist. 4. An den Kontaktstellen zwischen T- und L-System werden keine charakteristischen Triaden gefunden: für triadenähnliche Formationen wird der Name „Triadoid” vorgeschlagen. Triadoide unterscheiden sich von den echten Triaden der Skeletmuskulatur, da sich keine synapsenartigen Membranverdichtungen an den Kontaktstellen befinden. In die lateralen Cisternen der Triadoide kann Ferritin diffundieren. 5. Die Mitochondrien stehen über das T-System und die Triadoide in enger Beziehung zum Extracellulärraum. 6. An den Disci intercalares münden Tubuli des sarcoplasmatischen Retikulums, so daß Ferritin trotz der Abdichtung des Intercellulärspaltes durch Desmosomen und Nexusstrukturen in diesen gelangen kann. 7. Es wurden intermediäre Invaginationen auf der Höhe der M-Streifen beobachtet, die möglicherweise mit dem L-System eine Beziehung haben. 8. Über den Aufbau des sarcoplasmatischen Retikulums in den subsarcolemmalen Zonen wird ausführlich berichtet. 9. Weiterhin wird erörtert, welche Bedeutung die verschiedenen Strukturelemente des sarcoplasmatischen Retikulums für die physiologischen Eigenschaften des Herzmuskels haben.
    Notes: Summary The ultrastructure of the right ventricular heart muscle of the rat was examined with special attention directed at the sarcoplasmic reticulum. Besides the conventional methods of electron microscopical investigation, the application of ferritin as a tracer and serial sectioning of tissues gave the following results: 1. The sarcoplasmic reticulum is composed of a system of transverse tubules (T-system), and of a system of longitudinal tubules (L-system). 2. The T-system is composed of branching tubules which form an anastomic network connected with extracellular space. The cell membrane (inner sarcolemma) is in direct continuity with the membranes of the T-tubules. The basement membrane (outer sarcolemma) extends into the depth of the cell, following the invaginations of the cell membrane. Numerous T-tubules have a longitudinal course over short stretches. 3. A communication may occasionally be demonstrated between the tubules of the T-system and tubules which appear to belong to the L-system. The limitations of the present methods of identification of tubules as belonging to the one or the other system are discussed. 4. No classical triads (such as found in skeletal muscle) could be demonstrated at the points of contact between the T-system and the L-system. Instead, formations were demonstrated which were characterised by the absence of membrane thickenings of synaptic type. For such formations the name of triadoid system is suggested. Ferritin can diffuse into the lateral cisternae of the triadoid system. 5. The T-system and the triadoid system put the mitochondria in close contact with the extracellular space. 6. Tubules of the sarcoplasmic reticulum open into the intercalated discs; the ferritin granules can be demonstrated in the intercellular space inspite of closure by desmosomal complexes and nexus formations. 7. Intermediate invaginations at the level of the M band were observed: they may conceivably be connected with the L-system. 8. The structure of the sarcoplasmic reticulum in the subsarcolemmal regions was extensively discussed. 9. The significance of the various components of the sarcoplasmic reticulum in the light of the physiologic properties of the heart muscle was discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00334278
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  • 9
    Electronic Resource
    Electronic Resource
    Die Energie- und Isotopenabhängigkeit des chemischen Verhaltens von Molybdänrückstoßatomen in Hexacarbonylmetallverbindungen nach Kernreaktionen (1969)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 81 (1969), S. 949-949 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.196908122130
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  • 10
    Electronic Resource
    Electronic Resource
    Über aromatische polyamide mit heterocyclischen ringsystemenHerrn Professor Dr. K. HANSEN zum 60. Geburtstag gewidmet (1969)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 130 (1969), S. 103-144 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: In the production of high molecular weight aromatic polyamides which are soluble in polar solvents, novel aromatic diamines with oxdiazole, triazole, thiadiazole, thiazole, hydantoin, quinazolone and quinazolinedione ring systems - some of the novel aromatic diamines contain ether or sulfone groups - are reacted with aromatic dicarboxylic acid dichlorides (e.g. iso- or terephthaloyl dichloride) in polar organic solvents (e.g. N.N-dimethylacetamide or N-methyl-pyrrolidone).Filaments and fibres which possess a very good strength and a high thermal stability can be produced. Polyamides of diamines with quinazolinedione ring systems are most stable to high temperatures and are further distinguished by being only slightly liable to combustion.The new polyamides dissolved in polar solvents are suitable in the production of flexible films which are stable to high temperatures.
    Notes: Zur Herstellung von hochmolekularen aromatischen Polyamiden, die in polaren Lösungsmitteln löslich sind, wurden neue aromatische Diamine mit Oxdiazol-, Triazol-, Thiadiazol-, Thiazol-, Hydantoin-, Chinazolon- und Chinazolindion-Ringsystemen, die zum Teil auch noch Äther- oder Sulfongruppen enthalten, mit aromatischen Dicarbonsäuredichloriden (z. B. Iso- oder Terephthaloyldichlorid) in polaren organischen Lösungsmitteln (z. B. N.N-Dimethylacetamid oder N-Methylpyrrolidon) umgesetzt.Es konnten Fäden und Fasern hergestellt werden, die eine sehr gute Festigkeit und eine hohe Temperaturbeständigkeit aufweisen. Polyamide aus Diaminen mit Chinazolindion-Ringsystemen waren thermisch am beständigsten und zeichnen sich außerdem durch eine sehr geringe Brennbarkeit aus.Aus ihren Lösungen in polaren Lösungsmitteln lassen sich die neuen Polyamide auch zu geschmeidigen, hochtemperaturbeständigen Filmen verarbeiten.
    Additional Material: 8 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1969.021300106
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