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  • Springer  (64)
  • American Meteorological Society  (5)
  • Springer Nature  (5)
  • 1980-1984  (59)
  • 1955-1959  (15)
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Keywords
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Biological optimality: Comparison of generalized feasibility and optimality conditions for linear, error-minimizing systems (1982)
    Springer
    Bulletin of mathematical biology 44 (1982), S. 777-791 
    Details
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract An attempt is made to compare the conditions for the general error-optimality of linear systems developed by Kalman with the conditions for feasibility of linear models of neuromuscular and physiological control systems. Models of three actual physiological systems are tested for both the above criteria. Theoretical analysis presented here shows that there are no simple relationships between the two sets of conditions. Analysis carried out on the physiological systems models suggests the need for a general set of conditions for other optimality criteria, such as time and energy minimization, similar to Kalman's condition for error minimization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02465180
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  • 2
    Electronic Resource
    Electronic Resource
    Stoffwechselversuche mit radioaktiv markiertem Echtgelb (1955)
    Springer
    Monatshefte für Chemie 86 (1955), S. 444-448 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Zusammenfassung Ratten wurden mit radioaktiv markiertem (wasserlöslichem) Echtgelb gefüttert. Der Radiokohlenstoff verteilte sich in qualitativ ähnlicher Weise wie bei Verfütterung des (fettlöslichen) Buttergelbs über die Organe, doch verliefen Aufnahme und Abgabe schneller. Die Ausscheidung erfolgte auch beim Echtgelb im wesentlichen durch den Harn. Für den Unterschied in der krebserregenden Wirkung der beiden Farbstoffe können ihre Löslichkeitseigenschaften daher nicht unmittelbar verantwortlich gemacht werden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00903630
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  • 3
    Electronic Resource
    Electronic Resource
    Photoreceptor properties of an ectopic eye in the fleshfly,Sarcophaga bullata (1980)
    Springer
    Cellular and molecular life sciences 36 (1980), S. 993-994 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Ectopic eyes were produced on the fleshfly,Sarcophaga bullata by transplantation of imaginal eye discs. Electrophysiological and histological observations of these supernumerary eyes indicate the absence of synaptic connections between retinular cells and higher order neurons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01953841
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  • 4
    Electronic Resource
    Electronic Resource
    Development of visual sensitivity in the fly,Sarcophaga bullata (1983)
    Springer
    Cellular and molecular life sciences 39 (1983), S. 1318-1319 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Ontogeny of light response in the compound eyes of the fly,Sarcophaga bullata was investigated. Even though the eyes are structurally differentiated before eclosion they become electrophysiologically functional only after eclosion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01990392
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  • 5
    Electronic Resource
    Electronic Resource
    Isolierung von freier Benzoesäure aus dem Harn von an Hypophysen-Nebennierenrinden-Hyperfunktion leidenden Kranken (1957)
    Springer
    Naturwissenschaften 44 (1957), S. 539-540 
    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/BF00631420
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  • 6
    Electronic Resource
    Electronic Resource
    Einige Verbesserungen von Nachweisen in der organischen Tüpfelanalyse (1955)
    Springer
    Microchimica acta 43 (1955), S. 996-1003 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary Improvements of tests for alcohols, chloral, salicylalcohol, salicine, sulfoxylate compounds and certain reducing organic compounds are described, which lead to microanalytical sensibility and sometimes also to enhanced selectivity.
    Abstract: Résumé On décrit des améliorations des méthodes d'identification des alcools, du chloral, de l'alcool salicylique, de la salicine, de composés sulfoxyliques et de combinaisons organiques réductrices définies. Elles atteignent une sensibilité microanalytique et leur sélectivité est parfois accrue.
    Notes: Zusammenfassung Es werden Verbesserungen von Nachweisen von Alkoholen, Chloral, Salicylalkohol, Salicin, Sulfoxylatverbindungen und bestimmten reduzierenden organischen Verbindungen beschrieben, durch die man zu mikroanalytischer Empfindlichkeit und zum Teil auch zu erhöhter Selektivität gelangt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01223997
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  • 7
    Electronic Resource
    Electronic Resource
    Beiträge zur organischen Tüpfelanalyse (1957)
    Springer
    Microchimica acta 45 (1957), S. 341-353 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary Persuant to considerations and experiences derived from the chemistry of specific, selective and sensitive reactions, methods were developed for: 1. Detection of anthraquinone-sulfonic acids, based on the synthesis of polyhydroxyanthraquinones. 2. Detection of secondary alcohols, based on redox reactions with fused sulphur. 3. Detection of succinic acid and succinimide, based on the formation of pyrrole by distillation with zinc dust in the presence of ammonium chloride. 4. Detection of 1,2-diketones, based on the benzilic acid rearrangement. 5. Detection ofα-alanine (differentiation fromβ-alanine), based on the formation of acetaldehyde. 6. Detection of chloranil (differentiation from bromanil), based on the behavior toward pyrrole. 7. Detection of naphtalene, based of the formation of a colored addition compound with chloranil. All of the tests can be accomplished within the technique of spot test analysis, and microanalytical limits of detection are then attainable.
    Abstract: Résumé Sur la base de considérations et de résultats expérimentaux du domaine de la chimie des réactions spécifiques, sélectives et sensibles, les auteurs ont élaboré les techniques d'identification suivantes: 1 Identification d'acides anthraquinonesulfoniques reposant sur la synthèse de polyhydroxyanthraquinones. 2 Identification de groupements alcools secondaires reposant sur des réactions d'oxydoréduction avec le soufre fondu. 3 Identification de l'acide succinique et de la succinimide reposant sur la formation de pyrrole par réduction par la poudre de zinc et distillation en présence de chlorure d'ammonium. 4 Identification de dicétones 1,2 reposant sur la « transposition benzilique». 5 Identification de l'α alanine (différenciation de laβ alanine) reposant sur la formation d'acétaldéhyde. 6 Identification du chloranile (différentiation du bromanile) reposant sur son comportement en présence de pyrrole. 7 Identification du naphtalène reposant sur la formation d'un composé d'addition coloré avec le chloranile. Toutes ces identifications peuvent être effectuées par la technique des réactions à la touche, ce qui permet d'atteindre les limites de détection microanalytiques.
    Notes: Zusammenfassung Ausgehend von Überlegungen und Erfahrungen der Chemie der spezifischen, selektiven und empfindlichen Reaktionen wurden ausgearbeitet: 1. Nachweis von Anthrachinon-Sulfosäuren, beruhend auf der Synthese von Polyhydroxyanthrachinonen. 2. Nachweis sekundärer Alkohole, beruhend auf Redoxreaktionen mit geschmolzenem Schwefel. 3. Nachweis von Bernsteinsäure und Succinimid, beruhend auf der Bildung von Pyrrol durch Zinkstaubdestillation in Gegenwart von Ammoniumchlorid. 4. Nachweis von 1,2-Diketonen, beruhend auf der Benzilsäure-Umlagerung. 5. Nachweis vonα-Alanin (Unterscheidung vonβ-Alanin), beruhend auf der Bildung von Acetaldehyd. 6. Nachweis von Chloranil (Unterscheidung von Bromanil), beruhend auf dem Verhalten zu Pyrrol. 7. Nachweis von Naphthalin, beruhend auf der Bildung einer farbigen Additionsverbindung mit Chloranil. Sämtliche Nachweise sind in der Arbeitsweise der Tüpfelanalyse ausführbar, wobei mikroanalytische Erfassungsgrenzen erreicht werden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01257273
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  • 8
    Electronic Resource
    Electronic Resource
    The soft X-ray polychromator for the Solar Maximum Mission (1980)
    Springer
    Solar physics 65 (1980), S. 53-71 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The 1.4–22.4 Å range of the soft X-ray spectrum includes a multitude of emission lines which are important for the diagnosis of plasmas in the 1.5–50 million degree temperature range. In particular, the hydrogen and helium-like ions of all abundant solar elements with Z 〉 7 have their primary transitions in this region and these are especially useful for solar flare and active region studies. The soft X-ray polychromator (XRP) is a high resolution experiment working in this spectral region. The XRP consists of two instruments with a common control, data handling and power system. The bent crystal spectrometer is designed for high time resolution studies in lines of Fe i-Fe xxvi and Ca xix. The flat crystal scanning spectrometer provides for 7 channel polychromatic mapping of flares and active regions in the resonance lines of O viii, Ne ix, Mg xi, Si xiii, S xv, Ca xix, and Fe xxv with 14″ spatial resolution. In its spectral scanning mode it covers essentially the entire 1.4–22.5 Å region. This paper summarizes the scientific objectives of the XRP experiment and describes the characteristics and capabilities of the two instruments. Sufficient technical information for experiment feasibility studies is included and the resources and procedures planned for the use of the XRP within the context of the Solar Maximum Mission is briefly discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00151384
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  • 9
    Electronic Resource
    Electronic Resource
    Experimental study of quantum size effects in very thin metal films (1980)
    Springer
    Applied physics 21 (1980), S. 397-406 
    Details
    ISSN: 1432-0630
    Keywords: 73 ; 79.40
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The influence of the quantum size effect (QSE) in very thin Pd and Au films (0.5〈d〈10 [nm]) deposited on glass tips is studied by means of field emission at various anode potentials. The thickness-dependent field emission current characteristics show short periodic variations with a period of about 0.3 nm for both Pd and Au. The measured QSE oscillations and their amplitudes differ strongly from those expected qualitatively from model calculations for the smallest thicknesses. A model for the metal film based on a modification of the uniform background model is presented, and the thickness dependence of the conductance and the field emission current density are qualitatively discussed. Possible explanations of some discrepancies between calculations and the measured field emission current characteristics are proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00895932
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  • 10
    Electronic Resource
    Electronic Resource
    Genetic definition of a further gene region and identification of at least three different histocompatibility genes in the rat major histocompatibility system (1980)
    Springer
    Immunogenetics 11 (1980), S. 483-490 
    Details
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Two new recombinant haplotypes of the rat major histocompatibility system,RT1, have been detected in [LEW.1A (RT1 a ) ×LEW.1W (RT1 u )] × LEW 1N(RT1 n ) segregating hybrids. Recombinantr3 carries theRTL1. A region (determining classical transplantation antigens) and theRT1.B region (determining strong mixed lymphocyte reactivity and genetic control of antipolypeptide immune responsiveness) of the RT1a parent, bur rejects RT1a skin grafts. Recombinantr4 carries theA andB regions of the RT1u parent, but rejects RT1u skin grafts. The two histocompatibility genes detected are allelic to each other. The relevant locus, designated asH-C, maps to theB-region side of theRT1 system and appears to mark a thirdRT1 gene region,RT1.C. Availability of haplotypes r3 andr4 allowed the definition of a histocompatibility locus in theB region,H-B. The products ofH-C, H-B and of the previously describedH-A gene vary in antigenic strength.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01567816
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