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  • Springer  (30)
  • Wiley-Blackwell  (2)
  • American Meteorological Society
  • 1970-1974  (32)
  • 1935-1939
  • 1870-1879
  • 1972  (32)
  • 1
    Electronic Resource
    Electronic Resource
    Observations on cardiac energetics: I. Theoretical introduction (1972)
    Springer
    Bulletin of mathematical biology 34 (1972), S. 533-546 
    Details
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract Equations are developed to describe the energy expenditure of the human heart. As well as the external potential and kinetic energy terms, general consideration is given to other possible avenues of energy consumption. Emphasis is placed upon using mathematical variables which are readily available for experimental verification. The errors involved in assuming that mean values for the physiological parameters give reasonable estimations for the external mechanical performance are examined, and a theoretical estimation for the discrepancy in the kinetic component is presented. Logical extension of the mathematical derivation leads to a determination of cardiac external mechanical efficiency and clearly demonstrates the significance of the ventricular pressure-volume loop in this context. Finally, experimental procedures are suggested to clarify further some of the conclusions reached through the theoretical analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02476713
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  • 2
    Electronic Resource
    Electronic Resource
    Reviews (1972)
    Springer
    Transportation 1 (1972), S. 105-122 
    Details
    ISSN: 1572-9435
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00167512
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  • 3
    Electronic Resource
    Electronic Resource
    Detailed Ge(Li)-Ge(Li) coincidence studies of levels in152Sm and152Gd (1972)
    Springer
    The European physical journal 256 (1972), S. 387-415 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The decay of 12.4 y152Eu to152Sm and152Gd was studied in a high resolution singles measurement and two 4096×2048 Ge(Li)-Ge(Li) coincidence studies. Forty-five gates were analyzed in order to confirm or establish the placement of the γ rays as well as to accurately determine the intensities of the 12 doublets, which included several not previously reported. A new γ-β interband transition, 4 γ + →2 β + (561.4 keV), a possible 3 γ + →2 β + (423.7 keV) transition, and a new 330.9 keV transition between the 4 γ + level and theI π K=3−0 octupole level were established from coincidence data. Levels at 1757.0 keV in152Sm and 1282.5, 1318.7, and 1692.2 keV in152Gd are now established on the basis of coincidence data. These data also establish for the first time the population in the152Eu decay levels at 1680.0 and 1047.9 keV in152Sm and152Gd, respectively, as well as a new level at 1700.8 keV in152Sm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01386987
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  • 4
    Electronic Resource
    Electronic Resource
    Picard sets for entire functions (1972)
    Springer
    Mathematische Zeitschrift 126 (1972), S. 230-238 
    Details
    ISSN: 1432-1823
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01110727
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  • 5
    Electronic Resource
    Electronic Resource
    Effects of feeding-inhibitory quinones on the nervous system ofPeriplaneta (1972)
    Springer
    Cellular and molecular life sciences 28 (1972), S. 31-32 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Bei elektrophysiologischer und biochemischer Funktionsprüfung des Bauchmarkes vonPeriplaneta americana wird gezeigt, dass die frasshemmenden Chinone Juglon und 1,4-Naphthochinon sowie N-Aethylmaleimid sowohl die endogene Nervenaktivität wie auch ATPase hemmen, während Menadion nur auf die Nerven wirkte. 2-OH-1,4-Naphthochinon undp-Chloromercuribenzoat hemmten nur die ATPase und Iodacetamide hatte keinerlei Effekt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01928245
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  • 6
    Electronic Resource
    Electronic Resource
    Chromosomal polymorphism in the phyllostomatid bat,Mimon crenulatum (Geoffroy) (1972)
    Springer
    Cellular and molecular life sciences 28 (1972), S. 969-970 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Resumen Se discribe el polimorfismo cromosomal en el murcielagoMimon crenulatum desde localidades en Trinidad, Colombia, y el Perù. Se hallaron tres tipos morfológicos para cromosomas considerado a representar el quinto par de autosomas en ejemplares de cada region geogràfica donde hemos estudiado la especia. Los tres tipos morfológicos de los cromosomas de quinto par evidentemente originado por medio de inversiones pericentricas son metacéntrico, subtelocéntrico, y acrocéntrico.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01924978
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  • 7
    Electronic Resource
    Electronic Resource
    Isolation and identification of the gibberellins of Cucumis sativus and Cucumis melo (1972)
    Springer
    Planta 103 (1972), S. 241-248 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Thin-layer chromatography, gas-liquid chromatography, and mass spectrometry were used to identify gibberellins isolated from mature seeds of both Cucumis sativus (cucumber) and Cucumis melo (muskmelon). The gibberellins were extracted and purified by organic solvent fractionation, paper and thin-layer chromatography, and crystallization. Seeds of C. sativus were found to contain gibberellins A1, A3, A4, and A7 with A1 the predominant species. Seeds of C. melo contained gibberellins A1 and A3 and a trace of A5. Direct probe mass spectrometry of the gibberellins proved successful for identification purposes. Distinctive molecular ions and fragmentation patterns were obtained for each gibberellin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00386846
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  • 8
    Electronic Resource
    Electronic Resource
    The chemical composition of Ricinus phloem exudate (1972)
    Springer
    Planta 106 (1972), S. 131-140 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The chemical composition of exudate obtained from incisions made in the bark of the stem of actively growing Ricinus plants has been determined. The exudate had a high dry matter content (100–125 mg/ml), a high sugar content (80–106 mg/ml) which was solely sucrose, reducing sugars being absent. The amino acid composition was mainly glutamic and aspartic acids and threonine with a total amino acid concentration of 35.2 mM. The exudate had a pH of 8.0–8.2. Potassium was the major cation (60–112 mM) with sodium present at a lower concentration (2–12 mM). Of the divalent cations, calcium was at a low concentration (0.5–2.3 mM) and magnesium relatively higher (4.5–5.4 mM). Chloride was the major inorganic anion (10–19 mM). Phosphate concentration was relatively high (3.7–5.7 mM) and low concentrations of sulphate (0.3–0.5 mM) and bicarbonate (1.7 mM) were also present. Nitrate was absent. The ionic balance was maintained by the presence of relatively large quantities (30–47 meq/l) of organic anions, mainly malate. Bioassays revealed auxin, gibberellin and cytokinin activities in chromatographed exudate. Adenosine triphosphate was found in the exudate (0.40–0.60 mM). The analysis is dicussed with respect to the composition of phloem sap reported for other plant species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00383992
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  • 9
    Electronic Resource
    Electronic Resource
    Influence of carbon monoxide upon some respiratory enzymes of the chick embryo (1972)
    Springer
    Bulletin of environmental contamination and toxicology 8 (1972), S. 113-119 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Summary Hearts of 17-day-old chick embryos were assayed for alterations in lactic dehydrogenase and cytochrome oxidase activity following exposure to 425 ppm carbon monoxide during the previous 24 to 168 hours of incubation. The level of the heme-containing enzyme, cytochrome oxidase, was significantly less in the exposed than in the control embryos, and biologic effects of exposure and interaction were noted. There was no sigificant difference between the level of the nonheme-containing enzyme lactic dehydrogenase in the control and exposed group. Hypertrophy of the heart was noted in embryos exposed to CO for 144 and 168 hours.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01684517
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  • 10
    Electronic Resource
    Electronic Resource
    The effect of oxygen pressure on the liquid silver-alumina interface (1972)
    Springer
    Journal of materials science 7 (1972), S. 476-478 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02403414
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