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  • Springer  (55)
  • 2005-2009  (23)
  • 1975-1979  (26)
  • 1965-1969  (5)
  • 1950-1954  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Reduction of bovine pulmonary hypertension by normoxia, verapamil and hexaprenaline (1977)
    Springer
    Cellular and molecular life sciences 33 (1977), S. 1192-1194 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In calves with hypoxic pulmonary hypertension, resistance was reduced by 40±3% with normoxia, 19±4% with verapamil, and 60±1% with hexoprenaline. It is possible that the increased resistance during normoxia is due partly to vasoconstriction rather than solely to vascular thickening, and that the vasoconstriction is due to an abnormality in calcium metabolism by the hypertensive vasculature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01922322
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  • 2
    Electronic Resource
    Electronic Resource
    Field experiments on the competitiveness of males carrying genetic control systems forAedes aegypti (1976)
    Springer
    Entomologia experimentalis et applicata 20 (1976), S. 8-18 
    Details
    ISSN: 1570-7458
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Es wurde die Konkurrenzkraft vonAedes aegypti — Männchen ermittelt nach Anwendung von drei genetischen Verfahren, nämlich Chemosterilisation der Männchen, heterozygote doppelte Translokation (T1T3) und gestörte doppelte heterozygote Translokation (DT1T3) der Männchen, die in eine natürliche Population des hauptstädtischen Gebiets von Delhi freigelassen wurden; dabei wurde eine auf dem Prinzip des Freilassens und Wiederfangs von markierten Weibchen beruhende Methode verwendet. Chemosterilisierte und DT1T3 — Männchen zeigten annähernd normale Konkurrenzkraft, was den Ergebnissen von Labor- und Freilandkäfigversuchen entspricht. Die T1T3-Männchen zeigten verminderte Konkurrenzkraft im Feld und in Laborkäfigtests, im Gegensatz zu früher berichteten Befunden mit nicht-markierten T1T3-Männchen in Feldkäfigen. Die Ursache dieser Reduktion der Konkurrenzkraft war nicht klar.
    Notes: Abstract The competitiveness carrying males of three genetic control systems forAedes aegypti (L.), viz. chemosterilized males, double translocation heterozygote males (T1T3) and distorter double translocation heterozygote males (DT1T3), released into a natural population in the Delhi metropolitanxarea was evaluated using a method based on the principle of release and recapture of marked females. Chemosterilized males and DT1T3 males showed approximately normal competitiveness in the field which is similar to the results obtained from laboratory and field cage experiments. The T1T3 males were found to have reduced competitiveness both in the field and laboratory cage tests, in contrast to previously reported results with unmarked T1T3 males in field cages. The cause of this reduction in competitiveness was not clear.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01884747
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of some inorganic salts on wheat stem rust (1967)
    Springer
    Naturwissenschaften 54 (1967), S. 350-350 
    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/BF00621478
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  • 4
    Electronic Resource
    Electronic Resource
    Relative phytotoxicity of some picloram derivatives (1975)
    Springer
    Bulletin of environmental contamination and toxicology 14 (1975), S. 721-725 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01685248
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  • 5
    Electronic Resource
    Electronic Resource
    Computer-aided determination of annihilation and momentum transfer rates of slow positrons from argon gas atoms (1979)
    Springer
    Applied physics 18 (1979), S. 109-111 
    Details
    ISSN: 1432-0630
    Keywords: 34.70.-d
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Annihilation and momentum transfer rates of slow positrons in argon gas have been determined by an iterative computer-based analysis. Agreement of calculated positron annihilation decay constant with experimental measurements at various electric and temperature fields is very good.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00935912
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  • 6
    Electronic Resource
    Electronic Resource
    A numerical determination of the effect of electric fields and charges on the efficiency with which cloud drops and small raindrops collide with aerosol particles (1976)
    Springer
    Pure and applied geophysics 114 (1976), S. 509-520 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Numerical calculations were carried out to determine the effect of a vertical electric field on the efficiency with which electrically charged or uncharged cloud drops and small raindrops of diameters ranging from 84 μm to 1.248 mm collide with electrically charged or uncharged particles of density 2 gm/cm3 and diameters between 1 and 20 μm. For this purpose, numerical flow fields about spheres of Reynolds numbers ranging from 1 to 400 were used to integrate the trajectory of the particle relative to the drop, and the force between two conducting spheres was used to represent the electrostatic force on the particle. The effect of thunderstorm strength electric charges and field on the collision efficiency was found to be highly significant for the smaller collector drops, and declined to insignificance for the largest collector drop.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875647
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  • 7
    Electronic Resource
    Electronic Resource
    The electrostatic force between a charged conducting sphere and a charged dielectric sphere in an arbitrarily oriented external electric field (1976)
    Springer
    Pure and applied geophysics 114 (1976), S. 521-539 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The electrostatic force between a charged conducting sphere and a charged dielectric sphere in a uniform, arbitrarily oriented external electric field is obtained and presented in terms of force coefficients which depend only on the relative geometry of the two spheres and the dielectric constants of the dielectric sphere and the medium. When the dielectric constant of the dielectric sphere is allowed to approach infinity, the resulting computed force agrees with that ofDavis (1964) for two conducting spheres, and when the external field and the charge on the dielectric sphere are set to zero, the resulting force agrees with that ofHall andBeard (1975) for a charged conducting sphere near an uncharged dielectric sphere.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875648
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  • 8
    Electronic Resource
    Electronic Resource
    Hemodynamic and ventilatory effects of skin-cooling in cattle (1975)
    Springer
    Cellular and molecular life sciences 31 (1975), S. 1303-1304 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Cooling the skin of cattle at an ambient temperature of 25°C decreased cardiac output and increased systemic and pulmonary vascular resistances. Minute ventilation was reduced by about 50%. There was no change in alveolar ventilation as measured by arterial blood gases. These results indicate that thermoregulatory ventilation has significant cardiopulmonary effects in cattle at normal laboratory temperatures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01945793
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  • 9
    Electronic Resource
    Electronic Resource
    The role of lakeshore homeowner associations in environmental management (1979)
    Springer
    Environmental management 3 (1979), S. 195-203 
    Details
    ISSN: 1432-1009
    Keywords: Lake management ; Non-point source pollution ; Homeowners associations ; Adirondack Park ; Acid rain
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The purpose of this study was to determine what role lakeshore homeowner associations might play in environmental management. Lakeshore homeowner associations are formally organized groups of individuals owning property on or in the vicinity of a lake. Lakeshore homeowner associations in the Adirondack Park region of New York State were investigated by both a questionnaire mailed to all presidents and an informal field survey of some permanent lakeshore residents. The study showed that many of these organizations have become highly involved in an array of environmental management activities during their relatively long history. These activities include monitoring septic tank seepage, regulating the use of motorboats, restricting shoreline development, and assisting state and local planning agencies in detecting zoning violations. Some lakeshore homeowner associations are not highly involved in activities designed to maintain or improve quality of the lake environment. These associations are concerned instead primarily with organizing social events and performing other miscellaneous activities, such as access road maintenance. These associations, however, report lower overall water quality in their lakes than those associations with a high degree of involvement in environmental management. The study uncovered two important factors that tend to undermine the ability of lakeshore homeowner associations to undertake environmental management activities. One is the extent of cooperation that can be expected from nonmember residents of the lakeshore, such as seasonal vacationers. The second is an environmental problem that does not originate locally and therefore cannot be controlled by a local organization. Acid precipitation, rated by association presidents as their foremost water quality concern, is one such problem in the Adirondack Park Region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01866495
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  • 10
    Electronic Resource
    Electronic Resource
    Sarcoplasmic reticulum Ca2+-pump density is higher in distal than in proximal segments of porcine left coronary artery (1979)
    Springer
    Molecular and cellular biochemistry 158 (1979), S. 91-95 
    Details
    ISSN: 1573-4919
    Keywords: smooth muscle ; vascular ; ATPase ; calcium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract Densities of sarcoplasmic reticulum (SR) Ca2+-pump were compared in proximal and distal segments of pig left coronary artery using two biochemical methods: acylphosphate formation and immunoreactivity in Western blots, and a functional assay based on contraction to SR Ca2+-pump inhibitors. In the microsomes prepared from smooth muscle, the level of the 115 kDa SR Ca2+-pump acylphosphate was 7.1 ± 0.3 -fold greater in distal than in proximal segments. Similarly in Western blots using these microsomes, the reactivity of the 115 kDa band to an anti-SR Ca2+-pump antibody was 5.3 ± 0.8 -fold greater in distal than in proximal segments. Endothelium free coronary artery rings contracted to the SR Ca2+-pump inhibitors Cyclopiazonic acid (CPA, EC50 = 0.19 ± 0.06 μM) and thapsigargin (EC50 = 0.0095 ± 0.0035 μM). With 10 μM CPA, the force of contraction per tissue wet weight was 4.2 ± 0.5-fold greater in distal than in proximal rings, and with 1 μM thapsigargin it was 4.0 ± 1.0 -fold greater. The contractions produced by 60 mM KCl were used as a control. In contrast to the CPA and thapsigargin, the force per mg tissue weight produced by 60 mM KCl did not differ significantly between the proximal and distal segments. Thus, the results from the two biochemical methods and those from the contractility data were all consistent with the smooth muscle in the distal segments of the coronary artery containing a higher density of the SR Ca2+-pump than the proximal segments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00225887
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