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  • 1
    Electronic Resource
    Electronic Resource
    Amines Related to Epinephrine. IV. Some γ-Aryl, γ-Hydroxypropyl Amines and Intermediate β-Aminopropiophenones (1945)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 67 (1945), S. 1466-1468 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01225a016
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  • 2
    Electronic Resource
    Electronic Resource
    THE ENERGY SUPPLY FOR MUSCLE CONTRACTION (1959)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 81 (1959), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1959.tb49328.x
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  • 3
    Electronic Resource
    Electronic Resource
    Elaboration of Hydrochloric Acid by Gastric Mucosa (1947)
    [s.l.] : Nature Publishing Group
    Nature 159 (1947), S. 468-469 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE experiments the results of which are indicated below were designed to throw light on the mechanism of hydrochloric acid production in the stomach. In order to evaluate a theory of gastric acid elaboration, it is necessary to know the relative magnitude of the QO2, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/159468a0
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  • 4
    Electronic Resource
    Electronic Resource
    Chemistry of Muscle Contraction: Contraction of Muscle without Fission of Adenosine Triphosphate or Creatine Phosphate (1954)
    [s.l.] : Nature Publishing Group
    Nature 174 (1954), S. 1081-1083 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] AS Hill1 has pointed out, it still remains to be proved that adenosine triphosphate is the immediate source of energy in the contracting muscle. The analytical methods now available for determining the individual phosphate fractions of animal tissues have made it possible to re-examine directly the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1741081a0
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  • 5
    Electronic Resource
    Electronic Resource
    Rapid Rate of Turnover of Potassium Ions in Kidney Slices (1951)
    [s.l.] : Nature Publishing Group
    Nature 168 (1951), S. 700-700 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] TURNOVER OF POTASSIUM IN KIDNEY CORTEX SLICES Guinea pig tissue suspended in 2 ml. bicarbonate saline containing 0 -02 M glucose and 0 -01 M a-ketoglutarate. Potassium-42 chloride added after 25 min. preliminary incubation Incubation time after addition of potassium-42 ions 2 min. Fresh weight ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/168700a0
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  • 6
    Electronic Resource
    Electronic Resource
    Water at a Depth of − 5 ft. Discovered by Diving in Peak Cavern (1950)
    [s.l.] : Nature Publishing Group
    Nature 166 (1950), S. 894-895 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] DURING the exploration of the completely flooded Buxton Water Passage of Peak Cavern, Castleton, Derbyshire, on August 17, 197, a chamber in the roof was discovered (Fig. 1), 300 ft. from the diving base, in which the water at the top was 5 ft. 7 in. above the nearby free air-water surface in the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/166894a0
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  • 7
    Electronic Resource
    Electronic Resource
    Source of the Hydrogen Ions Produced by Gastric Mucosa (1947)
    [s.l.] : Nature Publishing Group
    Nature 160 (1947), S. 506-506 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Conway and Brady1 have claimed to show two statements made by Davies, Longmuir and Crane2 “… to be incorrect, as indicated in the accompanying cyclical scheme”. These statements were (1) “… so Conway's statement that … a cyclical process3 could give ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/160506a0
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  • 8
    Electronic Resource
    Electronic Resource
    γ -Rays from γ Geminorum? (1978)
    [s.l.] : Nature Publishing Group
    Nature 271 (1978), S. 634-635 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The star y Gem has rav = 1.9 mag and has been classified as AOIV (ref. 5) and A1III (ref. 6). Parallax measurements yield a distance estimate of d 30 pc (ref. 7). We therefore require / 0.17. We assume the star to have a bolometric luminosity £boi 6x 1035 erg s"1, a mass M\ 3A/Q and a ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/271634a0
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  • 9
    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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  • 10
    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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