Read about degradation | 3 Discussions | Page 1

  1. DennisN

    Bug Image degradation (compression?) in copied threads

    Hi! I recently noticed that posted images can lose quality when they are copied from a thread to a new thread. It seems they undergo some extra compression, and I don't understand why. Compare for instance the photos in this PF photo contest thread with the photos in the corresponding vote...
  2. J

    Pyrroles from urochrome?

    Urochrome/urobilin (structure below) is a tetrapyrrole, with the pyrroles connected with methylene (ish) bridges. I'm wondering if there's a good way to "crack" this molecule (like a hydrocarbon) along the bridges to yield the individual pyrroles. I ask because pyrrole synthesis is involved, and...
  3. P

    Protein melt temp/half life relation?

    Is anyone familiar with a way to determine the half-life of a protein from its melt temperature (Tm)? It seems like there ought to be some sort of correlation, be it theoretical or empirical.