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  • Springer  (217)
  • 1985-1989  (217)
Collection
Keywords
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Remote sensing of thunderstorm activity by means of VLF sferics (1985)
    Springer
    Pure and applied geophysics 123 (1985), S. 155-170 
    Details
    ISSN: 1420-9136
    Keywords: Thunderstorm activity ; Sferics ; Lability index
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The results of a three-month observational period (June–August 1981) during sunlit hours (9:00–15:00 GMT) with VLF sferics at the two stations Tel Aviv, Israel, and Pretoria, South Africa, are presented and compared with rainfall data for the European-African area, with two lability indices of thunderstorm prediction, and with synoptic thunderstorm reports for the same time interval. The locations of thunderstorm centers on the continents determined from the sferics stations compare reasonably well with the distribution of rainfall, indicating that the VLF sferics method is a useful measure of rainfall, particularly in remote regions with inadequate coverage of observing stations. The lability index of Showalter (1953) appears to be rather qualitative for the prediction of thunderstorm occurrence, and any fine structure in the distribution of thunderstorm centers as seen in the sferics data is lost. The same is true of the synoptic reports of thunderstorm days. A new lability index has been developed. This index leads to a more detailed structure of thunderstorm prediction, which is consistent with the sferics data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00877054
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  • 2
    Electronic Resource
    Electronic Resource
    Influence of medium amino acids on the ouabain sensitive and insensitive86Rb+-fluxes in Hela cells (1986)
    Springer
    Cellular and molecular life sciences 42 (1986), S. 436-437 
    Details
    ISSN: 1420-9071
    Keywords: HeLa cells ; Na+, K+-pump ; Na+, K+, 2Cl−-cotransport ; amino acids ; monensin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Components of the86Rb+-influx in HeLa cells were investigated in Joklik minimal essential medium, or in Earle's balanced salt solution with and without medium amino acids. The presence of amino acids led to the stimulation of the ouabain sensitive86Rb+-uptake and inhibition of the diuretic-sensitive and residual86Rb+-fluxes. These results show that the presence of amino acids is an important regulator of the K+/Rb+-fluxes under normal conditions in growth medium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02118646
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  • 3
    Electronic Resource
    Electronic Resource
    Wirbelstromortskurven der komplexen Permeabilität der ebenen Platte und des langen Kreiszylinders in Abhängigkeit von der magnetischen Feldstärke bei Gültigkeit des Rayleighgesetzes der Hysterese (1987)
    Springer
    Electrical engineering 70 (1987), S. 177-185 
    Details
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Contents Analytical expressions of the eddy current dispersion of the complex permeability for ferromagnetic bodies obeying the Rayleigh law and with shapes mentioned in the title are derived for low and moderate magnetic fields. They are valid in the whole frequency range. For low frequencies formulas for the real and the imaginary part of the permeability are presented, which permit the estimation of the error involved in the calculation of the power losses in the case of a simple superposition of eddy current and hysteresis losses.
    Notes: Übersicht Es werden analytische Ausdrücke der wirbelstrombedingten Dispersion der komplexen Permeabilität für ferromagnetische, dem Rayleighgesetz gehorchende Körper mit der in der Überschrift genannten Geometrie im Falle schwacher bis mäßig starker Magnetfelder abgeleitet, die für den gesamten Frequenzbereich gültig sind. Für niedrige Frequenzen werden Formeln für Real- und Imaginärteil der Permeabilität angegeben, die eine Abschätzung des Fehlers bei der Berechnung der Verlustleistung durch einfache Superposition von Wirbelstrom- und Hystereseverlusten gestatten.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01574067
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  • 4
    Electronic Resource
    Electronic Resource
    Zur Inhomogenität des inneren Feldes und der Flußdichte von kornorientierten Elektroblechen aus Silizium-Eisen bei Fehlorientierungen in der Blechebene (1989)
    Springer
    Electrical engineering 72 (1989), S. 51-57 
    Details
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Contents Starting from a model of a g.o. silicon-iron sheet with ideal goss-texture and an in-plane misoriented grain in the center the magnetization, the structure of the inner field and of the flux density in dependence on the external applied field are shown so that the deterioration of the flux guidance caused by such misoriented grains becomes visible.
    Notes: Übersicht Ausgehend von einem Modell eines kornorientierten Silizium-Eisenbleches mit idealer Goss-Textur und einem in der Blechebene fehlorientierten Korn im Zentrum werden die Magnetisierung, die Struktur des inneren Feldes und die Flußdichte berechnet. Die Struktur des inneren Feldes und der Flußdichte wird in Abhängigkeit vom aussteuernden Feld dargestellt, so daß die Verschlechterung der Flußführung durch derartig fehlorientierte Körner sichtbar wird.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01573569
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  • 5
    Electronic Resource
    Electronic Resource
    Zum Einfluß der Streufeldkopplung auf die magnetischen Eigenschaften und den Wirkungsgrad handelsüblicher Transformatorkerne aus kornorientierten Silizium-Eisen-Elektroblechen (1989)
    Springer
    Electrical engineering 72 (1989), S. 395-405 
    Details
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Contents From a survey of the important stray-field sources of a grain oriented M-shaped silicon-iron sheet follows that only the stray field at the air gap can give a remarkable contribution to the stray-field coupling. The influence of this air-gap stray fields on the magnetization structure and the magnetization reversal of a neighbouring sheet is investigated. From the shielding effect of the neighbouring sheet in dependence on the excitation in an applied field some statements concerning the influence of the stray-field coupling on the energy loss and the efficiency of the complete transformer core consisting of several sheets are derived and some proposals for the improvement of the efficiency during voltage transformation are given.
    Notes: Übersicht Aus einem vergleichenden Überblick über die wesentlichen Streufeldquellen eines M-Schnitt-Bleches aus kornorientiertem Silizium-Eisen folgt, daß nur das Luftspaltfeld einen merklichen Anteil zur Streufeldkopplung liefern kann. Der Einfluß dieses Luftspalt-Streufeldes auf die Magnetisierungsstruktur und den Ummagnetisierungsvorgang in einer benachbarten Blechlage wird untersucht. Aus einer Diskussion der abschirmenden Wirkung des benachbarten Bleches in Abhängigkeit von der Aussteuerung folgen Aussagen über den Einfluß der Streufeldkopplung auf die Energieverluste und den Wirkungsgrad des kompletten Transformatorkernes aus mehreren Blechlagen und Vorschläge zur Verbesserung des Wirkungsgrades bei der Spannungswandlung.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01573758
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  • 6
    Electronic Resource
    Electronic Resource
    Zur Stabilität vonC 0-Halbgruppen (1988)
    Springer
    Mathematische Annalen 280 (1988), S. 161-164 
    Details
    ISSN: 1432-1807
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01474187
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  • 7
    Electronic Resource
    Electronic Resource
    Characterization of the two nonallelic genes encoding mouse preproinsulin (1986)
    Springer
    Journal of molecular evolution 23 (1986), S. 305-312 
    Details
    ISSN: 1432-1432
    Keywords: Mouse insulin genes ; S1 nuclease ; Mung bean nuclease ; Primer extension
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary We have cloned and sequenced the two mouse preproinsulin genes. The deduced amino acid sequences of the mature mouse insulins are identical to the published protein sequences. However, the nucleotide sequence indicates that the mouse I C-peptide has a deletion of two amino acids compared with the mouse II C-peptide. We used an S1 nuclease assay to confirm the presence of the deletion and to measure the ratio of transcripts from gene I to transcripts from gene II. The mouse preproinsulin I gene, like the rat gene I, is missing the second intervening sequence that normally interrupts the C-peptide region in other insulin genes. Comparison of the 5′ flanking sequences of the mouse and rat genes II indicates that they are homologous for at least 1000 base pairs. The preproinsulin I genes also share homology in their 5′ flanking DNAs; however, their homology to the preproinsulin II genes extends for only about 500 base pairs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02100639
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  • 8
    Electronic Resource
    Electronic Resource
    Digoxigenated oligonucleotide probes specific for simple repeats in DNA fingerprinting and hybridization in situ (1989)
    Springer
    Human genetics 〈Berlin〉 82 (1989), S. 227-233 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A fast, reproducible and non-hazardous technique for non-isotopic DNA fingerprinting is presented. The method is based on digoxigenated oligonucleotides, which are specific for simple repetitive DNA sequences. The use of digoxigenin/ anti-digoxigenin detection avoids many drawbacks inherent in e.g. the biotin/streptavidin system which often causes a poor signal-to-background ratio. Synthesis and purification of digoxigenated oligonucleotides and their use in filter hybridization are described in detail. Hybridization patterns obtained with four different radioactively labeled oligonucleotides have been compared with those of the respective digoxigenated probes. When slightly less stringent hybridization conditions are applied for digoxigenated oligonucleotides than for those labeled with 32P, the signal intensities are satisfying but additional minor bands occur as a result of the reduced strigency. With one explainable exception, these bands increase the information content of the fingerprint. In addition, hybridization of the digoxigenated (CAC)5 probe has been performed in situ with human metaphase chromosomes. The hybridization patterns in many mitoses resemble R-bands.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00291160
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  • 9
    Electronic Resource
    Electronic Resource
    The gene encoding the Ia-Associated invariant chain is located on chromosome 18 in the mouse (1985)
    Springer
    Immunogenetics 21 (1985), S. 83-90 
    Details
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The chromosomal assignment of the gene encoding the invariant (Ii) chain associated with the mouse immune response antigens (la) was determined by Southern blot analysis of DNA from a panel of mouse x Chinese hamster somatic cell hybrids cleaved with Hind III or Eco RI. Using a mouse Ii cDNA as a hybridization probe, we localized the gene coding for the invariant chain to mouse chromosome 18.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00372244
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  • 10
    Electronic Resource
    Electronic Resource
    Carbon assimilation by the autotrophic thermophilic archaebacterium Thermoproteus neutrophilus (1986)
    Springer
    Archives of microbiology 146 (1986), S. 301-308 
    Details
    ISSN: 1432-072X
    Keywords: Thermoproteus neutrophilus ; Archaebacterium ; Autotrophic ; Reductive citric acid cycle
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Growth of Thermoproteus neutrophilus at 85°C was studied using an improved mineral medium with CO2, CO2 plus acetate, CO2 plus propionate, or CO2 plus succinate as carbon sources; sulfur reduction with H2 to H2S was the sole source of energy. None of the carbon compounds added was oxidized to CO2. The organism grew autotrophically with a generation time of 9–14 h, up to a cell density of 0.5 g dry weight per liter (2×109 cells/ml). Propionate did not stimulate, succinate slightly stimulated the growth rate. Acetate, even at low concentrations (0.5 mM), stimulated the growth rate, the generation time being shortened to 3–4 h. Acetate provided 70% of the cell carbon, which shows that Thermoproteus neutrophilus is a facultative autotroph. The path of these carbon precursors into cell compounds was studied by 14C long-term labelling and investigation of enzyme activities. Propionate could not be used as a major carbon source and was incorporated only into isoleucine, probably via the citramalate pathway. Acetate was a preferred carbon source which suppressed autotrophic CO2 fixation: acetate grown cells exhibited an incomplete citric acid cycle in which 2-oxoglutarate dehydrogenase was present, but fumarate reductase was “repressed”. The succinate incorporation pattern and enzyme pattern indicated that autotrophic CO2 fixation proceeded via a yet to be defined reductive citric acid cycle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00403234
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