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Rod, Many sincere thanks for your good wishes. I hope the loss of this great man will not precipitate any more bad news. I am poised on the brink regarding the monarchy. I hope to live long enough to see King William and Queen Kate. Charles has not been a lucky name in our history. Say no more.Cat, *How does it go?* At my end very well Cat, thanks. Sorry to hear about the passing of Prince Philip this morning, Prince Philip, Longtime Husband of Queen Elizabeth II, Dies at 99, https://www.msn.com/en-us/news/world/prince-philip-longtime-husband-of-queen-elizabeth-ii-dies-at-99/ar-BB1ftivR?ocid=msedgdhp
Philip was a WWII hero---Rod
It is a function of the forum software. Context is not taken into account. Either allow the word or you don't, so these situations will arise from time to time.P.S. I am a little surprised that, talking about chemical reactions, the normal word ret***ed was replaced by ********. I can see that this word should be censored in other contexts, but it is absolutely normal in scientific literature and is in no way considered derogatory when applied to chemical reactions. It is rather more elegant than "slowed down".
Many thanks. I do understand. Would you like me to delete the P.S. part? No problem.It is a function of the forum software. Context is not taken into account. Either allow the word or you don't, so these situations will arise from time to time.
We now return you to our regularly scheduled forum discussion.
Wolfshadw
Moderator
P.S. Sympathies as well.Many
KC Strom, you may enjoy this report. 'Chance played a role in determining whether Earth stayed habitable', https://www.nature.com/articles/s43247-020-00057-8, December 2020. "Abstract Earth’s climate has remained continuously habitable throughout 3 or 4 billion years. This presents a puzzle (the ‘habitability problem’) because loss of habitability appears to have been more likely. Solar luminosity has increased by 30% over this time, which would, if not counteracted, have caused sterility..."To me, Abiogenesis is an interesting theory on a number of levels. First, the idea that a machine like a cell "just appeared" is amazing. At the simplest level I believe cells need some kind of an enclosure, a metabolic system, and a way to copy themselves and pass along genetic info. Assuming the "detail parts" of those requirements were created in a warm little pond, the self-assembling machine seems a bit tricky.
Time is an issue as well. I don't believe the 3 or 4 billion year old fossils are the simplest of cells. So they must have undergone some evolution. Is a billion or so years enough ?
Of course I don't know the answers.
I am a surfactant chemist, so for me the idea of self assembly presents no problem.To me, Abiogenesis is an interesting theory on a number of levels. First, the idea that a machine like a cell "just appeared" is amazing. At the simplest level I believe cells need some kind of an enclosure, a metabolic system, and a way to copy themselves and pass along genetic info. Assuming the "detail parts" of those requirements were created in a warm little pond, the self-assembling machine seems a bit tricky.
Time is an issue as well. I don't believe the 3 or 4 billion year old fossils are the simplest of cells. So they must have undergone some evolution. Is a billion or so years enough ?
Of course I don't know the answers.
"Abstract A method has been developed by which the cell wall of Chlamydomonas reinhardi may be dissociated into its components, and then reassembled in vitro into a product that is chemically and structurally identical to the original cell wall."I'll find you smoe interesting references. Here is a start:
Self-assembly of a plant cell wall in vitro☆
Author links open overlay panelG.J.HillsJ.M.PhillipsM.R.GayK.Roberts
“The salt-soluble glycoproteins alone can self-assemble under various conditions to form fragments that have the crystalline structure characteristic of the outer layers of the complete cell wall.”
That's a good start.
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