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K. Bischoff J. Pichner W. E. Braselton C. Counard D. C. Evers W. C. Edwards 《Archives of environmental contamination and toxicology》2002,42(1):71-76
Mercury and selenium act as mutual antagonists in mature birds, but their toxicity is additive or synergistic in avian embryos
and immature birds. Twenty eggs and livers from 18 mature and 9 immature common loon carcasses found in Minnesota were collected.
Livers and eggs were analyzed for mercury and selenium by atomic emission and atomic absorption spectroscopy. Liver mercury
concentrations were significantly higher in mature loons compared to those of immature loons and eggs. Liver selenium concentrations
were significantly higher in mature loons than those of immature loons, and selenium concentrations in immature loon livers
were significantly higher than levels in eggs. There was a significant positive correlation between mercury and selenium in
loon livers. There was a negative correlation between mercury and selenium in eggs.
Received: 2 February 2001/Accepted: 28 May 2001 相似文献
68.
P Dietrichson J Coakley P E Smith R D Griffiths T R Helliwell R H Edwards 《Journal of neurology, neurosurgery, and psychiatry》1987,50(11):1461-1467
Percutaneous muscle biopsy is an important and acceptable technique in the study of conditions involving human skeletal muscle. A review of 436 conchotome and needle muscle biopsies obtained over 18 months in this centre is presented. 相似文献
69.
D G Brown J M Greer E M Webster R A Yonker N L Edwards S Longley R S Panush 《Annals of allergy》1987,58(3):162-3, 209-12
70.
M Salim-Hanna A M Edwards E Silva 《International journal for vitamin and nutrition research. Internationale Zeitschrift für Vitamin- und Ern?hrungsforschung. Journal international de vitaminologie et de nutrition》1987,57(2):155-159
Studies in animals have suggested that the products of the irradiation of tryptophan in the presence of riboflavin may play a role in the development of hepatic dysfunction during parenteral nutrition. In this paper we describe the formation of an adduct between tryptophan and riboflavin obtained as a consequence of an anaerobic irradiation of these compounds. Through the use of molecular sieves and of an ion-exchange resin it was possible to separate the photo-adduct from the dimer riboflavin and other reaction products. The various fractions were characterized on the basis of their absorption and emission spectra. Also used were measures of anisotropy of fluorescence emission in order to characterize the derived adduct. 相似文献