Elgersma, . , Rijkers, . and Liskamp, . (2009) pH Controlled aggregation morphology of Aβ(16–22): formation of peptide nanotubes, helical tapes and amyloid fibrils. In: Del Valle, S. , Escher, E. and Lubell, W. D. (eds.) Peptides for Youth: The Proceedings of the 20th American Peptide Symposium. Series: Advances in Experimental Medicine and Biology (611). Springer New York, pp. 239-240. ISBN 9780387736563 (doi: /978-0-387-73657-0_109 )
This Fortune 500 Directory was prepared under the direction of list editor Scott DeCarlo. Income statement and balance sheet data provided by the companies were reviewed and verified against published earnings releases, 10-K filings, and annual reports by reporter Douglas G. Elam and accounting specialists Rhona Altschuler, and Cappy Lyons. Markets editor Kathleen Smyth used those same sources to check the data for earnings per share. In addition, we used data provided by Thomson Reuters and S&P Global Market Intelligence to calculate total return and market capitalization. Database administrator Santhosh Varghese provided technical support. The data verification process was aided substantially by information provided by S&P Global Market Intelligence. Other sources used were Hoover’s and Lexis Securities Mosaic.