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The constancy of the activation energy of metabolism (E) for all living organisms is one of the most impressive, though controversial, statements of the modern metabolic theory of evolution. According to WBE-theory suggested by West, Brown, and Enquist, E should be in the range from -0.6 to -0.7 eV. However, there are many examples of significant deviations of E from the predictions of the theory. Now we have conducted a study of this value using rats in different types of pharmacological hypothermia 1. Short-term (for several hours) hypothermia induced by

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None of the compounds showed activity in the ex vivo assays against the blood trypomastigote of both strains. Interestingly, the selectivity index of Androst-5-en-3β,17β-diol 4a was almost twice the value of Nfx and 50 times more than Bz, against Ninoa and TH strains, respectively. Therefore, compound 4a could represent a valuable starting point toward the optimization of steroid derivatives as trypanocidal agents.Here we report the successful construction of a novel, stereochemically diverse DNA-Encoded Chemical Library (DECL) by util