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Ribose administration during exercise: Effects on substrates and products of energy metabolism in healthy subjects and a patient with myoadenylate deaminase deficiency (1991)

Gross, M. ; Kormann, B. ; Zöllner, N.

Springer

Journal of molecular medicine 69 (1991), S. 151-155

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ISSN: 1432-1440

Keywords: Myoadenylate deaminase ; AMP-deaminase ; Deficiency ; Ribose ; Lactate ; Ammonia ; Hypoxanthine ; Muscle ; Metabolism

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Summary Nine healthy men and a patient with myoadenylate deaminase deficiency were exercised on a bicycle ergometer (30 minutes, 125 Watts) with and without oral ribose administration at a dose of 2 g every 5 minutes of exercise. Plasma or serum levels of glucose, free fatty acids, lactate, ammonia and hypoxanthine and the urinary hypoxanthine excretion were determined. After 30 minutes of exercise without ribose intake the healthy subjects showed significant increases in plasma lactate (p〈0.05), ammonia (p〈0.01) and hypoxanthine (p〈0.05) concentrations and a decrease in serum glucose concentration (p〈0.05). When ribose was administered, the plasma lactate concentration increased significantly higher (p〈 0.05) and the increase in plasma hypoxanthine concentration was no longer significant. The patient showed the same pattern of changes in serum or plasma concentrations with exercise with the exception of hypoxanthine in plasma which increased higher when ribose was administered.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01665856

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Amalgam electrodes: Direct electrochemical generation of cadmium macrocyclic complexes (1992)

Boudon, C. ; Gisselbrecht, J. P. ; Gross, M.

Weinheim : Wiley-Blackwell

Electroanalysis 4 (1992), S. 19-26

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ISSN: 1040-0397

Keywords: Amalgam electrode ; cadmium ; macrocyclic complexes ; Chemistry ; Polymer and Materials Science

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: The electrochemical oxidation of cadmium amalgam was studied in the nonaqueous solvents CH2Cl2, 1,2-C2H4Cl2 and propylene carbonate. Significant coordination effects were observed between the electrogenerated Cd(II) ions and 18-membered macromonocyclic ligands, each containing six Lewis bases heteroatoms: 18-O6, 18-S6, 18-N2O4, and 18-N6. The stoichiometries and the stabilities of the resulting complexes were determined. These stabilities increase from 18-O6 or 18-S6 to 18-N6.

Additional Material: 3 Ill.