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Showing content with the highest reputation on 07/27/24 in all areas

  1. Recently I read an article in The Guardian about cancer vaccines. Do you think these vaccines are likely to be on the market available for patients within this decade? Cancer and heart disease vaccines ‘ready by end of the decade’ Exclusive: Pharmaceutical firm says groundbreaking jabs could save millions of lives https://www.theguardian.com/society/2023/apr/07/cancer-and-heart-disease-vaccines-ready-by-end-of-the-decade
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  2. Here is the video clip of that moment: https://edition.cnn.com/2024/07/27/politics/video/trump-christian-vote-vinjamuri-nr-digvid The most charitable interpretation is that Trump was either appealing to elderly Christian voters who won't be around to vote in 2028 - or perhaps to those MAGA fundamentalists who regard him as the Messiah, and who think that his second coming would coincide with the 'End of Days', and the 'Rapture' of the 'Elect' into heaven ?
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  3. Thanks for the concern, But I'm a good 500 mi from Jasper, and on the other side of the continental divide.
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  4. No, no, yes, and no. Liquid water cannot exist above its critical temperature of 647 K (374 oC) at any pressure. Above that temperature, steam is a gas: below it, a vapour. (The distinction is due to whether or not it is possible for a vapour/liquid equilibrium state to exist at a particular temperature).
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  5. As far as I can tell from looking at spectra on-line, water vapour does not absorb the 2.4 GHz EM radiation typically used in µwave ovens. I don't think liquid water has any resonances there either- the heating is dielectric heating. https://en.wikipedia.org/wiki/Dielectric_heating Once the food in an oven gets heated to about 100C any additional energy is used to produce steam (and a vanishingly small amount to drive chemical reactions which we call cooking). Absorption spectra in the vapour phase consist of fairly fine lines. The crude power supplies etc of a microwave oven will mean that the emission is relatively broad. Only a small part of the emission could overlap. So the coupling to the gas would be very poor. At least some dielectric heating of fats will happen (penetration depths are of the order of 100 mm) and their higher boiling point means that they could (locally) be heated well above 100C. Steam in contact with them may become superheated.
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  6. Yes, you could have steam hotter than 100 C if it absorbed microwaves.
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  7. Collaboration frequently outperforms competition in evolutionary contexts
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