Archimedes plutonium12/27/2023 ![]() ![]() According to this theory, there was no Big Bang, but rather growth from a "Hydrogen Atom Totality" into the present "Plutonium Atom Totality", in which "the galaxies are dots of the electron dot cloud".Ģ. According to the aforelinked repository of unblemished truth that is Wikipedia, Archimedes has since discoveredġ. Incidentally, there's a better write-up of this at Stanford:Īs Archimedes Plutonium. I would guess that this is not so much an issue in this case, because (1) no one is really interested in the chemical structure of the parchment itself, and (2) a particular spot on the sample is exposed only for a very short time. Also, in your typical protein diffraction experiment, you irradiate a particular spot on the crystal for a very long time. This basically causes impurities in the crystal (local changes in the structure factor) that degrade the diffraction measurement. ![]() From my understanding, protein crystals are particularly bad, presumably because they not respond well (in a chemical sense) to the large numbers of electrons generated after an x-ray absorption event. Susceptibility to radiation damage varies from material to material. I've never had a problem with x-ray damage to my samples (mostly inorganic solids). I'm not a protein crystallographer, but I do work at a synchrotron and do lots of x-ray absorption and diffraction experiments. Even then, they don't like it and try to avoid it. Other popular techniques include the use of various frequencies of light and/or UV, to reveal marks that wouldn't otherwise be visible, which is how some of the more "legible" parts of the palimpset of Archimedes were photographed prior to this.Ĭhemical techniques exist, but archaeologists are wary of anything that can damage an ancient find, unless it is so far beyond salvage that preservation of the original would be impossible anyway. It led to a lot of cases being thrown out on appeal, and a subsequent inquiry as to what had happened. The technique hit the news during the West Midlands Serious Crime Squad fiasco, when it was demonstrated, by use of this technique, that "confessions" had been altered after they had been signed by the supposed confessee. A technique was developed in the UK - I believe it was called ESDA - which used magnetic fields and extremely fine iron dust to detect indentations left in paper when layers further up had been written on. Yes, similar techniques to the X-Ray fluorescence are being used on a wide range of archaeological finds, from illegible scrolls found in Italy to manuscripts found in various rubbish tips from the dark ages and before.Īctually, the idea seems to have started about 15-20 years ago, of using various attributes to read xsuch documents.
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |