4 Matching Annotations
  1. Nov 2021
    1. our fourth point is that for something like eukaryotes and others where there is no immediate major system 00:25:30 transition we're really sort of saying is that they perhaps are critical to such a transition but not at the time necessarily that they have evolved so in essence we want to amp we want to bring in a new 00:25:43 term which we call facilitating evolutionary transition so it makes it is part of a major system transition but it clearly needs other 00:25:55 evolutionary events to go along with it and the final sort of point is that there are perhaps catalysts that are involved in this process and one of the major catalysts that may 00:26:12 have had effects throughout evolutionary history are viruses so viruses may have been key actors to help the transition from 00:26:23 rna to dna they may have uh produced or helped produce the nucleus in eukaryotes and we'll talk about a little bit later about the key role that viral genes play 00:26:36 in making sexual reproduction possible and even in placental mammals the evolution of a placenta so without viral genes being moved across 00:26:47 horizontally species some of these major transitions could never have happened so now we have sort of the complete integrated process of of our diagram and again the question 00:27:02 that we're really focusing on oftentimes is that last one yes when how and why do we get to a major system transition and how do nets mechs uh 00:27:15 fets and catalysts all play a role in these various transitions

      Viruses have played a key role in a number of different METs. This is an important insight that can contextualize the covid-19 pandemic.

  2. Oct 2021
  3. Apr 2020
    1. In either scenario, a massive hemothorax is an indication for operative intervention, but tube thoracostomy is critical to facilitate lung reexpansion, which may improve oxygenation and cardiac performance as well as tamponade venous bleeding.

      improving oxygenation cardiac performance tamponade venous bleeding

  4. Aug 2018