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  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 107 (1982), S. 929-936 
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Physiology 26 (1964), S. 15-46 
    ISSN: 0066-4278
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Medicine , Biology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/General Subjects 758 (1983), S. 128-134 
    ISSN: 0304-4165
    Keywords: (Fibroblast) ; Cell growth ; Prolyl hydroxylase ; Protein metabolism
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Surface & Coatings Technology 43-44 (1990), S. 950-962 
    ISSN: 0257-8972
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Thin Solid Films 70 (1980), S. 43-47 
    ISSN: 0040-6090
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Computing 30 (1983), S. 19-33 
    ISSN: 1436-5057
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Description / Table of Contents: Zusammenfassung IstG ein zweifach zusammenhängender Graph mit zwei verschiedenen Knotens undt, so wird seine Knotenmenge derart zwischens undt angeordnet, daß jeder weitere Knoten zwischen zweien seiner Nachbarn liegt. Es wird ein Algorithmus angegeben, der aus einer einfachen Tiefensuche abs mit einer zusätzlichen Nachbearbeitung besteht, die nur einen Zeit- und Speicheraufwand der Ordnung 0(n) erfordert.
    Notes: Abstract Given a biconnected graphG and two distinct verticess andt, the vertices ofG are sorted in such a way, thats is first,t is last, and every other vertex is somewhere between two of its neighbours. An algorithm is given which consists of a simple depth-first search starting froms followed by some additional postprocessing. The latter uses only 0(n) time and space.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Engineering with computers 13 (1997), S. 125-133 
    ISSN: 1435-5663
    Keywords: AND/OR graph ; Configuration management ; Software engineering database ; Transaction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract We consider the logical organization of database support for software engineering applications, which has to cope with such requirements as the adequate support of object composition and versioning, the derivation of (consistent) configurations, and the provision of application-specific transactions. A new approach to the organization, manipulation and management of multiversion objects in CASE databases is described and investigated, which clearly distinguishes four relevant concepts: documents, versions, configurations and databases. The approach is formally made precise using the concept ofAND/OR graphs, which renders it possible to cast operations on any of the concepts in terms of graph operations. The levels of abstraction distinguished and maintained throughout the exposition give rise to an appropriate transaction concept: transactions involve graph operations on specific types of objects only; conflicts between transactions can thus be easily identified, and consistency of objects is easily maintained.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 11 (1992), S. 754-755 
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 212 (1965), S. 155-167 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die übliche Methode der papierchromatographischen Trennung und Bestimmung von kondensierten Phosphaten ist in ihrer Anwendung dadurch eingeschränkt, daß zu ihrer Durchführung zweckmäßig Konzentrationen von 1000–5000 mg je Phosphat in 1 l erforderlich sind. Bei Proben, die z.B. im Bereich der Wasserchemie, der Lebensmittelchemie oder der biologischen Chemie in Frage kommen, liegen die gesuchten Phosphatgehalte meist wesentlich niedriger. Eine Konzentrierung durch Eindampfen würde u. a. die Zustandsform der Phosphate infolge Hydrolyse verändern. Zur Bestimmung der verschiedenen Phosphate in diesen Bereichen eignet sich die Anionenaustauscher-Chromatographie. Sie ermöglicht es, ionogen gelöste Phosphate abzutrennen und Hinweise auf die Verteilung von nicht ionogen gelösten anorganischen und organischen Phosphaten zu erhalten. Bis in den Konzentrationsbereich von weniger als 1 mg Gesamt-P2O5 im Liter können ionogen gelöste kondenierte Phosphate getrennt und bestimmt werden. In den angeführten Beispielen wurden in phosphatbehandeltem Trinkwasser, in Flußwasser und in Abwasser bis zu 7 verschiedene Zustandsformen von Phosphaten nebeneinander bestimmt: Unter den beschriebenen Arbeitsbedingungen ungelöste Phosphate, nicht ionogen gelöste hochkondensierte anorganische Phosphate und organische Phosphate, und ionogen gelöste Verbindungen (getrennt in Mono-, Di-, Tri-, Trimeta- und hochkondensierte Phosphate).
    Notes: Summary The usual method of paper-chromatographic separation and determination of condensed phosphates is limited in its application, because it requires concentrations of 1000 to 5000 mg in 1 l for each phosphate. For samples which are involved e.g. in the field of water chemistry, food chemistry or biological chemistry, the desired phosphate contents are mostly far lower. A concentration by evaporating would change the state of the phosphates by hydrolysis. Anion-exchange chromatography is suitable for the determination of different phosphates in these fields. It permits the separation of ionically dissolved phosphates and allows to obtain information about the distribution of inorganic and organic phosphates not ionically dissolved. Ionically dissolved condensed phosphates can be separated and determined up to a concentration of less than 1 mg of total P2O5 per liter. In the examples mentioned above up to 7 different states of phosphates were individually determined in drinking water treated with phosphate, in river water and in waste water: phosphates undissolved under the conditions described, not ionically dissolved high condensed inorganic phosphates and organic phosphates, and ionically dissolved compounds (separated in mono-, di-, tri-, trimeta- and highcondensed phosphates).
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 85 (1975), S. 283-291 
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The cell membrane potential of cultured Chinese hamster cells is known to increase at the start of the S phase. The putative role of the cell membrane potential as a regulator of cell proliferation was examined by following the cell cycle traverse of synchronized Chinese hamster cells in the presence or absense of high exogenous levels of potassium. An increase in external potassium levels results in a depressed membrane potential and a reduced rate of cell proliferation. A potassium concentration of 115 mM was used in experiments with synchronized cells since at that level cell proliferation is almost completely halted, recovery of growth is rapid and complete, and the membrane potential is reduced to a level well below that normally found in cells in the G1 phase.A mitotic population was divided into four aliquots and plated in either control medium or medium containing 115 mM K+. Cells placed directly into high K+ medium were retarded in their exit from mitosis and displayed a delayed and abnormal entry into the S phase. If control medium was added after two hours, cell cycle traverse was normal, but delayed by two hours compared to control cells. If the mitotic cells were plated directly into control medium and two hours later were shifted to high K+ medium, the cells entered the S phase in the absence of the normally observed increase in membrane potential and proceeded to the next mitosis normally. It was concluded that the increase in membrane potential observed at the start of the S phase in isolated synchronized cells is not a requirement for the initiation of DNA synthesis. In addition, sensitivity to the high potassium regimen was found at two different times during the cell cycle. In one case, cells were impeded in their transit through mitosis. Such cells displayed an altered chromosome structure which may account for the partial mitotic block. In the second case, synchronized cells displayed a sensitivity to the high potassium regimen in early G1 which appeared to be separate from the block in mitosis and independent of a change in the membrane potential.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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