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Macromolecules 53, 91589186
Studies using high-performance liquid chromatography (HPLC) to track copper peptide degradation found that refrigerated solutions retain 8590% potency at 7 days, 7075% at 14 days, and below 60% at 21 days
The popularity of this approach increased dramatically after introduction of the Fourier-transform infrared spectrometers in 1950s that combined mathematical theory with advancements in optical engineering, followed by further instrumental improvements that made FTIR systems more compact and user-friendly
Journal of Investigative Dermatology, Volume 113, Issue 3, 1999, Pages 364-368
BPC-157 remains an experimental compound without regulatory approval for human use