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  • Springer  (160)
  • Wiley  (153)
  • American Institute of Physics  (90)
  • Oxford University Press  (57)
  • Wiley-Blackwell  (38)
  • American Chemical Society (ACS)  (35)
  • Nature Publishing Group (NPG)
  • Seismological Society of America (SSA)
  • 2010-2014  (373)
  • 1965-1969  (98)
  • 1960-1964  (76)
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  • 1
    Digitale Medien
    Digitale Medien
    Pairs of bilinear and quadratic equations in a finite field (1966)
    Springer
    Monatshefte für Mathematik 70 (1966), S. 155-160 
    Details
    ISSN: 1436-5081
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01297270
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Evaluation of high shear viscosity data from jet and concentric cylinder viscometers (1962)
    Springer
    Rheologica acta 2 (1962), S. 82-87 
    Details
    ISSN: 1435-1528
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: Summary This work compares and evaluates viscosity data obtained on similar fluids by two widely accepted high shear techniques. Both the jet and concentric cylinder viscometers are useful high shear methods. The major limitation of the jet viscometer is an inability to distinguish quantitatively between energy losses in laminar flow and those due to capillary geometry and experimental conditions. For example, the jet viscometer gives minima in viscosity-shear rate correlations which are difficult to treat. These minima are not found in concentric cylinder viscometer data for the same and similar fluids. The apparent viscosity increase at high shear in the jet may be due to factors other thanReynold's turbulence, as previously supposed. This effect may be due to molecular relaxation phenomena in certain cases. The jet viscometer might thus be used to evaluate molecular relaxation and/or other phenomena contributing to this effect. For a variety of systems, the concentric cylinder viscometer gives significantly smaller temporary viscosity losses due to shear than do the jet viscometer data. These comparisons are made using the maximum jet shear rate at the capillary wall. The differences are, of course, larger if average shear rates are used to compare the data. It is concluded that the jet viscometer results tend to be erroneous. This is possibly due to capillary end effects or problems with kinetic energy corrections.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01972559
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  • 3
    Digitale Medien
    Digitale Medien
    Some systems of equations in a finite field (1967)
    Springer
    Mathematische Zeitschrift 100 (1967), S. 141-145 
    Details
    ISSN: 1432-1823
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01110790
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  • 4
    Digitale Medien
    Digitale Medien
    Generalized quadratic forms inGF(q) (1969)
    Springer
    Archiv der Mathematik 19 (1969), S. 615-620 
    Details
    ISSN: 1420-8938
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01899391
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  • 5
    Digitale Medien
    Digitale Medien
    Application of the differential scanning calorimeter to purity measurements (1969)
    Springer
    Journal of thermal analysis and calorimetry 1 (1969), S. 449-458 
    Details
    ISSN: 1572-8943
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Beschreibung / Inhaltsverzeichnis: Résumé On décrit une nouvelle méthode à calculer la pureté des substances organiques non polymères à l'aide de la courbe enregistrée sur un “Differential-Scanning Calorimètre”Perkin-Elmer. Au lieu d'utiliser seulement la partie initiale du pic, on se sert du tracé complet. On attribue une valeur numérique définie à la perte d'énergie, précédemment déterminé e par approximations successives. Un seul enregistrement sur le DSC permet d'obtenir des valeurs significatives de la pureté, avec des échantillons à 95–99.9 %. On montre que cette nouvelle méthode fournit des résultats plus exacts et moins ambigus que celle des fabricants
    Kurzfassung: Zusammenfassung Es wird über eine neue Methode zur Ermittlung der Reinheit von organischen, nicht-polymeren Stoffen mit Hilfe einer durch ein Differential-Scanning Calorimeter Perkin-Elmer gezeichneten Kurve berichtet. Die Methode beruht auf der Verwendung der vollen Kurve und gibt für den Energieverlust definitive numerische Werte. Verläßliche Reinheitswerte von Proben von 95 bis zu 99.9 % Reinheit können durch eine einzige Kurve erhalten werden. Die neue Methode gibt sicherere und eindeutigere Ergebnisse als die von den Geräterzeugern vorgeschlagene.
    Notizen: Abstract This paper presents a new method for the calculation of the purity of organic, non-polymeric samples using the recorder trace from a Differential Scanning Calorimeter (DSC), Perkin-Elmer Corp. The entire DSC recorder trace is employed rather than only the initial portion of the curve. The previous trial and error choice of energy lost by the DSC trace has been replaced by a definite numerical value. Meaningful purity values have been obtained from a single DSC trace on samples of from 95 to 99.9% purity. This new method has been demonstrated to provide more accurate and less ambiguous results than the manufacturer's procedure.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01983087
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  • 6
    Digitale Medien
    Digitale Medien
    The Z disc of skeletal muscle fibrils (1963)
    Springer
    Cell & tissue research 61 (1963), S. 661-672 
    Details
    ISSN: 1432-0878
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary The structure of the Z disc has been studied in thin sections of striated muscle fibers from a wide variety of vertebrates. A common organization is found in all muscles examined. The disc shows a regular pattern made up of dense lines which seem to connect the actin filaments from adjacent sarcomeres. The lines are sometimes disposed to form a regular zigzag configuration; in other orientations with respect to the plane of the section the morphology is confused and, in still other images, the dense lines continuous with the actin filaments seem to go straight through the Z disc. In cross section this structure corresponds to a square pattern of considerable regularity. The intersections in the square pattern mark the location in the plane of the section of the actin filaments from adjacent sarcomeres. Dense lines form the edges of the squares and appear to represent condensations of Z-disc material, i.e., the lines in the zigzag. The possible origin of the structure as a product of the stretching of a membrane is discussed, together with functional interpretations of the Z disc.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00342617
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  • 7
    Digitale Medien
    Digitale Medien
    Centriole replication during ciliogenesis in the chick tracheal epithelium (1969)
    Springer
    Cell & tissue research 100 (1969), S. 1-30 
    Details
    ISSN: 1432-0878
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary Morphological aspects of centriole replication as displayed in tracheal epithelial cells of 15 to 19-day-old chick embryos during ciliogenesis were examined by electron microscopy. It was found that centriole replication and development take place in a finely fibrous region around the two mature centrioles of the diplosome. Procentrioles in early stages of development are observed in clusters. The core of each cluster is occupied by one or more cylindrical structures which gradually disappear as the procentrioles mature. Some of the procentriolar clusters are attached directly to the walls of the diplosomal centrioles by the cylindrical cores. This observation suggests that all of the clusters may form initially in close association with the diplosomal centrioles. The earliest recognizable procentrioles are short, cylindrical structures that have no microtubules. Later microtubules appear, first as singlets, then doublets and finally as triplets. The singlet becomes the innermost microtubule of the triplet. Following the assembly of the nine triplets, the procentrioles separate from the clusters, elongate to their mature length and acquire rootlets, ciliary vesicles and cilia. The observation that all the procentrioles in each cell are in the same stage of development indicates that all the centrioles or presumptive basal bodies required by this cell are produced at the same time.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00343818
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  • 8
    Digitale Medien
    Digitale Medien
    A comparative study of cytoplasmic basophilia and the population density of ribosomes in the secretory cells of mouse seminal vesicle (1960)
    Springer
    Cell & tissue research 52 (1960), S. 697-711 
    Details
    ISSN: 1432-0878
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary A comparative cytochemical and electron microscopic study on the ergastoplasm in the secretory cells of the seminal vesicles of castrated, normal, and testosterone-treated mice is reported. Castration induced a progressive decline in cytoplasmic basophilia (identified with ribonucleic acid) and testosterone treatment caused an enhancement over the normal level. There were corresponding changes in total area of ergastoplasmic membranes, but the expected changes in population density of ribosomes (ribonucleoprotein particles) in the intercisternal cytoplasm did not occur. These observations conflict with the currently-accepted view that almost all of the ribonucleic acid responsible for cytoplasmic basophilia in adult mammalian cells is contained in the ribosomes. Other changes in the fine structure of these cells in the experimental animals are briefly described.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00336621
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  • 9
    Digitale Medien
    Digitale Medien
    The influence of variable depth on steady zonal barotropic flow (1964)
    Springer
    Ocean dynamics 17 (1964), S. 164-174 
    Details
    ISSN: 1616-7228
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Lösungen für Gleichungen werden gegeben, welche die Wirkung einfacher Bodentopographie auf eine anfangs uniforme zonale Strömung beschreiben, die reibungslos, stetig und barotropisch ist. Ein unendlich langer Rücken oder ein unendlich langes Tal verursachen bei Strom nach Westen eine unendliche Ablenkung der Stromlinien, während bei Strom nach Osten entweder eine unendliche Ablenkung oder ein stationäres Rossby-Wellenmuster auftreten können. Mehrere Beispiele werden für das Verhalten dieser Wellen gegeben.
    Kurzfassung: Résumé Des solutions sont obtenues pour l'effet de simples topographies sur un courant zonal (uniforme à l'état initial) dans une mer homogène sans frottement (pour un mouvement permanent). Dans le cas de mouvement vers l'Ouest, un banc infiniment long (chaîne de montagnes) ou une vallée sous-marine donne naissance à une déflection infinie des lignes de courant; dans le cas de mouvement vers l'Est une déflection infinie ou une configuration stationnaire de vagues de Rossby peuvent être présent. Plusieurs examples sont donnés afin d'illustrer la nature de ces configurations.
    Notizen: Summary Solutions are obtained in frictionless, steady barotropic flow for the effect of simple bathymetric features on an initially uniform zonal current. For flow towards the west, an infinitely long ridge or valley causes an infinite streamline deflection while for flow towards the east, either an infinite deflection or a stationary Rossby, wave pattern may occur. Several examples are given which illustrate the behavior of these waves.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02224975
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  • 10
    Digitale Medien
    Digitale Medien
    Systems of bilinear and quadratic equations in a finite field (1965)
    Springer
    Annali di matematica pura ed applicata 68 (1965), S. 21-29 
    Details
    ISSN: 1618-1891
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik
    Notizen: Summary An explicit formula is found for the number of solutions in a finite field of the system of polynomial equations(11), when the coefficients satisfy certain conditions.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02411019
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