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  • 1
    Digitale Medien
    Digitale Medien
    Electron spin-lattice relaxation of SO 3 − radical ion in a single crystal of barite (1990)
    Springer
    Physics and chemistry of minerals 17 (1990), S. 24-26 
    Details
    ISSN: 1432-2021
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Geologie und Paläontologie , Physik
    Notizen: Abstract The electron spin-lattice relaxation time (T1e) of the paramagnetic radical-ion center SO 3 − in a naturally occurring single crystal of barite was studied in the temperature range 10–300 K by the pulse saturation recovery technique. The changes in T1e from 30 K to 300 K are much smaller than those expected from usual Raman processes in solids. The results suggest a very weak connection between SO 3 − center and lattice.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00209221
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  • 2
    Digitale Medien
    Digitale Medien
    The chemistry of securinine, an alkaloid of the root of securinega suffruticosa (Pall.) rehd (1963)
    Springer
    Naturwissenschaften 50 (1963), S. 155-155 
    Details
    ISSN: 1432-1904
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie , Allgemeine Naturwissenschaft
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00623072
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  • 3
    Digitale Medien
    Digitale Medien
    A 41, XYY mouse (1981)
    Springer
    Cellular and molecular life sciences 37 (1981), S. 821-822 
    Details
    ISSN: 1420-9071
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary Cytogenetic analyses of bone marrow and meiotic cells in an apparently normal male mouse clearly revealed the presence of an extra Y chromosome leading to 2n=41, XYY. During meiosis the sex chromosomes formed all possible types of combinations (XYY, XY/Y, YY/X and X/Y/Y). Compared to 40, XY normal mice, the sperm count was significantly less, but the incidence of sperm head abnormality was at the normal level.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01985659
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  • 4
    Digitale Medien
    Digitale Medien
    Chromosome replication patterns in the Djungarian hamster (Phodopus sungorus) (1978)
    Springer
    Chromosoma 67 (1978), S. 165-176 
    Details
    ISSN: 1432-0886
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract Patterns of early and late replication in the individual chromosomes of the Djungarian hamster (Phodopus sungorus) have been studied using the techniques of Giemsa staining suppression when bromodeoxyuridine is incorporated into the DNA. — Late replicating autosome regions correspond to G-band regions, early replication regions are less clearly demarcated but correspond to R-band regions plus some G-band zones. In part this reduction in sharpness of early replication bands may be due to the fact that nearly all metaphase G-bands contain R-band material since they are compounded from blocks of sub-G bands. — The long arm of the X chromosomes in the female differ in the start time of synthesis but are rarely separable at the close of S. There are no differences between the short arms. In the male, Y starts very late but finishes about the same time as the X which behaves like the early replicating X of the female.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00293174
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  • 5
    Digitale Medien
    Digitale Medien
    A semi-empirical model for flow of blood and other particulate suspensions through narrow tubes (1975)
    Springer
    Bulletin of mathematical biology 37 (1975), S. 459-470 
    Details
    ISSN: 1522-9602
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Mathematik
    Notizen: Abstract A semi-empirical model applicable to the flow of blood and other particulate suspensions through narrow tubes has been developed. It envisages a central core of blood surrounded by a wall layer of reduced hematocrit. With the help of this model the wall layer thickness and extent of plug flow may be calculated using pressure drop, flow rate and hematocrit reduction data. It has been found from the available data in the literature that for a given sample of blood the extent of plug flow increases with decreasing tube diameter. Also for a flow through a given tube it increases with hematocrit. The wall layer thickness is found to decrease with increase in blood hematocrit. A comparison between the results of rigid particulate suspensions and blood reveals that the thicker wall layer and smaller plug flow radius in the case of blood may be attributed to the deformability of the erythrocytes.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02459514
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  • 6
    Digitale Medien
    Digitale Medien
    Numerical determination of Cauchy principal value integrals (1981)
    Springer
    Computing 27 (1981), S. 373-378 
    Details
    ISSN: 1436-5057
    Schlagwort(e): Principal value integrals ; isolated singularities ; poles ; Laurent's expansion ; analytic ; degree of precision ; (1970) Primary 65 D 30
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Informatik
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Es wird eine Quadraturformel zur numerischen Auswertung des Cauchyschen Hauptwertes eines Integrals vom Typ $$\int\limits_{ - 1}^1 {f(x)/(x - a) dx} $$ angegeben, wo −1〈a〈1 ist undf(x) eine Singularität im Komplexen in der Nähe des Integrationsweges besitzt. Eine Fehleranalyse wird durchgeführt.
    Notizen: Abstract A quadrature rule for numerical evaluation of Cauchy principal value integrals of the type $$\int\limits_{ - 1}^1 {f(x)/(x - a) dx} $$ where −1〈a〈1 andf(x) possesses complex singularities near to the path of integration has been formulated. An analysis of the error has been provided.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02277187
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  • 7
    Digitale Medien
    Digitale Medien
    Approximate evaluation of multiple complex integrals of analytic functions (1983)
    Springer
    Computing 30 (1983), S. 279-283 
    Details
    ISSN: 1436-5057
    Schlagwort(e): (1970) Primary 65 D 30 ; Analytic function ; multiple integral ; product rule ; degree of precision ; error estimate
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Informatik
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Zur numerischen Auswertung mehrfacher Integrale analytischer Funktionen vonn komplexen Veränderlichen wird eine nicht-produktartige Formel vom Grad 5 mit 4 n +1 Punkten konstruiert, bei der einige der 5 n Knotenpunkte entbehrlich werden, die sich durch Produktbildung aus der 5-Punkt-Formel vom Grad 5 von Birkhoff und Young ergeben. Eine asymptotische Fehlerschätzung für den Falln=2 wird angegeben.
    Notizen: Abstract For the numerical evaluation of multiple integrals of analytic functions ofn complex variables, a (4 n +1)-point degree five non-product rule has been constructed discarding certain points from the set of 5 n nodes needed in the product layout based on the five point degree five rule due to Birkhoff and Young. An asymptotic error estimate for the casen=2 has been determined.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02253899
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  • 8
    Digitale Medien
    Digitale Medien
    Equations of motion of elliptic restricted problem of three bodies with variable mass (1988)
    Springer
    Celestial mechanics and dynamical astronomy 45 (1988), S. 387-393 
    Details
    ISSN: 1572-9478
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The differential equations of motion of the elliptic restricted problem of three bodies with decreasing mass are derived. The mass of the infinitesimal body varies with time. We have applied Jeans' law and the space-time transformation of Meshcherskii. In this problem the space-time transformation is applicable only in the special case whenn=1,k=0,q=1/2. We have applied Nechvile's transformation for the elliptic problem. We find that the equations of motion of our problem differ from that of constant mass only by a small perturbing force.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01245759
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  • 9
    Digitale Medien
    Digitale Medien
    Growth ofVigna unguiculata L. var. GWL K3B in sub-optimal moisture conditions as influenced by certain antitranspirants (1986)
    Springer
    Plant and soil 91 (1986), S. 31-42 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Cycocel (CCC) ; Maleic hydrazide ; Phosfon-D ; Sub-optimal soil moistureVigna unguiculata L. Var. GWL K3B
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary An experiment for differential water supply was set up. The effects of antitranspirants Phosfon-D and CCC on the growth ofVigna unguiculata L. Var K3B grown under suboptimal soil moisture conditions were recorded. An evaluation of the various aspects of growthe.g., seedling survival percentage, shoot growth, root growth, stomatal index and chlorophyll content indicated that application of CCC and Phosfon-D can help withstanding the adverse effects of sub-optimal soil moisture conditions to a certain extent. In the beginning of the paper effects of Phosfon-D CCC and MH on seedling growth are described.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02181816
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  • 10
    Digitale Medien
    Digitale Medien
    Preparation and characterisation of magnesium sulphate heptahydrate from Kimberlite tailings (1991)
    Springer
    Journal of thermal analysis and calorimetry 37 (1991), S. 945-951 
    Details
    ISSN: 1572-8943
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Mittels DTA und Röntgendiffraktion wurden verwitterte Kimberlit-AbgÄnge aus Diamantbergwerken in Panna charakterisiert. Das Röntgendiagramm zeigt die Gegenwart von Serpentin-, Quarz-, Kalzit-, HÄmatit-, Magnetit- und Anatas-Phasen. Die DTA-Kurve zeigt einen ersten endothermen Peak bei 125
    Notizen: Abstract Weathered Kimberlite tailings of Panna Diamond Mines were characterised by DTA and XRD techniques. The XRD pattern shows the presence of serpentine, quartz, calcite, hematite, magnetite and anatase phases. DTA curve indicates first endothermic peak at 125
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01932792
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