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  • 1
    Electronic Resource
    Electronic Resource
    Determination of Dimethyl Sulfoxide in Plasma and Cerebrospinal Fluid by Gas-Liquid Chromatography. (1966)
    s.l. : American Chemical Society
    Analytical chemistry 38 (1966), S. 651-652 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac60236a039
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  • 2
    Electronic Resource
    Electronic Resource
    A comparison of concentrations of fission products, radon 222, and cloud condensation nuclei over the North Atlantic (1979)
    Springer
    Pure and applied geophysics 117 (1979), S. 874-882 
    Details
    ISSN: 1420-9136
    Keywords: Cloud condensation nuclei ; Nuclear fission products ; -concentration of in air
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The concentrations of airborne fission products were observed to be air mass dependent during a cruise of the USNSHayes from Norfolk, Va to Athens, Greece in May–June 1977. Minimum concentrations of fission products, radon, and CCN (cloud condensation nuclei) were measured in maritime air which had previously transited northern North America. Higher fission products, radon, and CCN concentrations were measured in recent, continental air traceable to mid North America or central Europe. These data are consistent with either entrainment by strong winds of previously precipitated fission products (the ‘continental effect’) or greater transfer of fission products from the stratosphere to low levels by tropospheric folding.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00876071
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  • 3
    Electronic Resource
    Electronic Resource
    Radon 222 measurements below 4 km as related to atmospheric convection (1973)
    Springer
    Pure and applied geophysics 105 (1973), S. 900-906 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Radon (Rn222) profiles were made over southwest Arizona from 300 m to 4km altitude. A temperature inversion near 2000 m and a stable radon concentration averaging 32.0 pc m−3 at 2000 m were characteristic of morning flights. At 300 m there was a definite pattern of high radon concentrations in the early morning and lower concentrations by noon. At 760 m the radon concentration increased between the times of ascent and descent. This pattern resulted from the trapping of radon close to the ground during stable night-time conditions and its subsequent upward dispersal with solar heating. The day-to-day variation in radon concentrations at higher levels cannot be attributed to local upward transport by diffusion but must have resulted from larger scale circulations. Above 2000 m there are no conclusive differences between morning, afternoon and evening profiles. Low concentrations of radon were measured during one late evening profile when there was definite subsidence and advection of drier air into the region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875839
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  • 4
    Electronic Resource
    Electronic Resource
    Radon profiles over Kilauea, the Hawaiian Islands and Yukon Valley snow cover (1974)
    Springer
    Pure and applied geophysics 112 (1974), S. 204-208 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Three radon (222Rn) samples collected on 10 February, 1972, in the plume of Kilauea volcano averaged 3.26 pCi m−3 (1 pCi=2.22 dpm). Radon measurements up to an altitude of 5 km on the windward side of the Hawaiian Islands in early February 1972 show concentrations largely independent of height. Concentrations measured during four days of observations were in the range of 3 to 4 pCi m−3. On 7 February, concentrations of 6 to 7 pCi m−3 were measured and suggest an air mass that had moved more rapidly from (or had accumulated more radon while over) continental areas. Over-ocean measurements, made in transit to and from Hawaii and Alaska at 2 to 3 km altitudes, averaged 3.6 pCi m−3. A strong inversion and radon concentrations as high as 260 pCi m−3 at an altitude of 90 m were observed over the thick snow cover in the Yukon Valley in Alaska in mid-February 1972. These radon data are compared to theoretical radon profiles for conditions of strong inversion up to an altitude of 2 km and are consistent with an exhalation rate of 0.33 atom cm−2 sec−1 (19×10−18 Ci cm−2 sec−1) at the surface of the snow. Above 2 km the radon concentrations showed large variations and probably respond to large-scale weather conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875935
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  • 5
    Electronic Resource
    Electronic Resource
    ATP, Activation, and the Heat of Shortening of Muscle (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 148-151 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Prof. A. V. Hill has challenged biochemists to find whether the heat of shortening of muscle has any equivalent in the chemistry of muscle. It is shown that the heat of shortening, which is reabsorbed as tension disappears, is not degraded free energy from the splitting of ATP. It must be ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/214148a0
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  • 6
    Electronic Resource
    Electronic Resource
    A periodic grain consolidation model of porous media (1989)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 1 (1989), S. 38-46 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Calculations are presented for a periodic grain consolidation model of porous media. The model is an extension of previous work on lattices of spheres, in which the radius of the spheres is allowed to increase past the point of close touching to form a consolidated medium. A collocation method is used for the solution of Stokes flow in terms of Lamb's general solution in spherical coordinates. Excellent accuracy is achieved with only moderate computational effort. At low concentrations up to the close touching limit excellent agreement is found with the earlier calculations of Zick and Homsy [J. Fluid Mech. 115, 13 (1982)]. For high concentrations above the close touching limit, an asymptotic theory is presented that agrees within a few percent with the numerical computations over the entire consolidated range.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.857545
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  • 7
    Electronic Resource
    Electronic Resource
    Thermodynamic efficiency and physiological characteristics of the chick anterior latissimus dorsi muscle (1970)
    Springer
    Journal of comparative physiology 66 (1970), S. 379-388 
    Details
    ISSN: 1432-1351
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary 1. The physiological characteristics of the chick anterior latissimus dorsi muscle were measured and compared with those of the adjacent posterior latissimus dorsi muscle. The rate of shortening of the anterior latissimus dorsi was about 15 times slower than that of the posterior muscle. 2. The anterior latissimus dorsi was found to be able to sustain isometric tension for long periods of time. In spite of this the resting ATP level of this muscle was only 1 μmole/g whereas in the posterior muscle it was about 3 μmoles/g. 3. The amount of ATP used by the anterior latissimus dorsi in performing isotonic work and in maintaining isometric tension was measured. This involved incubating the muscles for 40 min in a 0.38 mM solution of 2,4 dinitrofluorobenzene (DNFB) solution in Ringer at 2° C. The muscles were rapidly frozen during contraction by immersion in a mixture of Freons 12 and 13 cooled to −160° C. 4. The anterior latissimus dorsi was found to be relatively inefficient at performing isotonic work (Efficiency=100 g cm/μmole of ATP per g) but very efficient in maintaining isometric tension. Very little ATP was used in maintaining isometric tension for periods as long as a minute. 5. The results were compared with those for hamster muscles presented in a following paper.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00299937
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  • 8
    Electronic Resource
    Electronic Resource
    The immediate energy supply and the cost of maintenance of isometric tension for different muscles in the hamster (1970)
    Springer
    Journal of comparative physiology 66 (1970), S. 389-397 
    Details
    ISSN: 1432-1351
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary 1. The resting levels of ATP and creatine in different (untreated) hamster muscles were measured and compared with their physiological properties. Muscles which normally fatigue quickly were found to have high levels of ATP and creatine. 2. The utilization of ATP by these muscles in developing and maintaining isometric tension was also measured. The inhibition of the creatine phospho-transferase reaction was accomplished by incubating the muscles in DNFB Ringer for 35 min at 2° C. The muscles were frozen during contraction by rapid immersion in a mixture of Freons 12 and 13 cooled to −160° C. 3. The amount of tension developed and maintained per micromole of ATP was as follows; biceps brachii 30.8×103, diaphragm 36.3×103, extensor digitorum longus 103.3×103 and soleus 191.0×103g sec per gram. The efficiency of the muscles in maintaining tension was inversely proportional to their rate of contraction. 4. This information was compared with data from a preceding paper on the efficiency of the true slow muscle in the chick. It was concluded that the slow muscles are more efficient in maintaining isometric tension because of a long cross link engagement time (as the cross links only use ATP when breaking and remaking). However slow muscles are inefficient in shortening and doing work because the cross links that are shortening are working against those that have shortened but which are still holding.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00299938
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  • 9
    Electronic Resource
    Electronic Resource
    Spinal cord transection and CCl4-toxicity (1963)
    Springer
    Cellular and molecular life sciences 19 (1963), S. 604-606 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Typisch CCl4-verursachte Leberschäden wurden bei Ratten mit Rückenmarkdurchtrennung und Körpertemperaturen von 35 bis 36°C beobachtet. Minimale histopathologische Veränderungen wurden bei gleich behandelten Ratten bei Zimmertemperatur beobachtet. Verlängerung der Beobachtungszeit an spinalisierten ausgekühlten Ratten lässt aber auch bei Zimmertemperatur typische Leberverletzungen entstehen. Diese Ergebnisse deuten auf Veränderung des Leberstoffwechsels durch Hypothermie hin, und es ist daher anzunehmen, dass dies die Ursache ist, weshalb die Leber von Ratten mit Rückenmarkschnitt gegen CCl4-Schäden relativ geschützt ist.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02151017
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  • 10
    Electronic Resource
    Electronic Resource
    Fluctuations in sarcomere length in the chick anterior and posterior latissimus dorsi muscles during isometric contraction (1970)
    Springer
    Cellular and molecular life sciences 26 (1970), S. 16-18 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Es wird gezeigt, dass die Schwankung der Sarkomerenlänge bei Benützung der «laser beam» — Methode während der isometrischen Kontraktion der M. latissimi dorsi beim Hühnchen verschieden war. Der Schwankungsumfang war in den vorderen und hinteren Muskeln ungefähr gleich (900 Å), hingegen war die Frequenz in den hinteren phasischen Muskeln dreimal höher als in den vorderen tonischen Muskeln.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01900361
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