985 resultados para exceptional circumstances
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Mode of access: Internet.
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Mode of access: Internet.
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Issues for 2007- have subtitle: budget considerations and recommendations.
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Mode of access: Internet.
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"B-164031(4)"--p. [1].
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"B-198027."
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NUC pre-1956
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Author's presentation copy.
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Mode of access: Internet.
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"Serial no. 91-81."
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Cyclic pentapepticles are not known to exist in a-helical conformations. CD and NMR spectra show that specific 20-membered cyclic pentapepticles, Ac-(cyclo-1,5) [KxxxD]-NH2 and Ac-(cyclo-2,6)R[KxxxD]-NH2, are highly a-helical structures in water and independent of concentration, TFE, denaturants, and proteases. These are the smallest a-helical peptides in water.