. Ciba Foundation colloquia on ageing. Old age; Aging; Animals -- growth & development. 92 Albert I. Lansing Constancy with age of human arterial elastin A total of 110 human aortas and 106 human puhiionary arteries from which both intima and adventitia had been removed by stripping were analysed for elastin content by the method just outlined. The results obtained by these procedures on aortas ranging in age from stillborn to one hundred and three years are 90 80 70 >- 50 I 40 Z 5 ^ o cc u «^ 20 10. 10 15 â 35â-toâtSâ^3â55" 20 25 30 MINUTES Fk;. 1. Hydrolysis of human aortas in 0
. Ciba Foundation colloquia on ageing. Old age; Aging; Animals -- growth & development. 92 Albert I. Lansing Constancy with age of human arterial elastin A total of 110 human aortas and 106 human puhiionary arteries from which both intima and adventitia had been removed by stripping were analysed for elastin content by the method just outlined. The results obtained by these procedures on aortas ranging in age from stillborn to one hundred and three years are 90 80 70 >- 50 I 40 Z 5 ^ o cc u «^ 20 10. 10 15 â 35â-toâtSâ^3â55" 20 25 30 MINUTES Fk;. 1. Hydrolysis of human aortas in 0 ⢠1 n XaOH showing that incubation at 98° C. for at least 45 minutes is needed to procure a constant residuum of insoluble elastin. 60 summarized in Fig. 2. The average elastin content of the media during the first two decades of life is slightly over 48 per cent while the average elastin content in the third decade and thereafter drops to values ranging between 41-1 and 44 ⢠1 per cent. Because of the limited number of specimens available for analj^sis in the first two decades it is difficult to decide whether or not this apparent drop in medial elastin. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ciba Foundation; Wolstenholme, G. E. W. (Gordon Ethelbert Ward). Boston, Little, Brown
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