linkedin post 2021-06-02 04:19:35

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NO KNOWLEDGE IS A PRIORI. “Indeed, for Quine, nothing is knowable a priori. The thesis is that everything in the web— the mundane beliefs about the physical world, the scientific theories, the mathematics, the logic, the connections of meaning—is up for revision if the "data" become sufficiently recalcitrant.” https://lnkd.in/dWBTyPy View in LinkedIn
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linkedin post 2021-06-02 04:18:34

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SAVING THE 2ND LAW. “Historically, the idea to associate the black-hole surface area with entropy was suggested by Bekenstein in order to save the validity of the second law of thermodynamics in a gedanken experiment in which an entropy-bearing object falls into a black hole.” https://lnkd.in/d3sfhP6 View in LinkedIn
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linkedin post 2021-06-04 04:00:37

linkedin post 2021-06-04 04:00:37

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WE CONTINUE with Professor Jacob D Bekenstein, the star of the past series of posts, with a paper that audaciously suggests that the evidence points to a universe as a giant hologram. This is a beautifully articulated article written for the non-specialist — but, dear reader — after surviving the past two dizzyingly technical papers as primers, this should be a breeze! https://www.scientificamerican.com/article/information-in-the-holographic-univ/ View in LinkedIn
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linkedin post 2021-06-05 04:50:51

linkedin post 2021-06-05 04:50:51

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CAUSE OF ZIG-ZAG. The unusual backbone is associated with guanosine residues which have an unusual conformation. NMR studies in solution have shown that purine residues can adopt the syn and anti conformations with equal ease. Another difference is found in the pucker of the sugar ring.” https://link.springer.com/content/pdf/10.1007/978-94-009-7052-6.pdf View in LinkedIn
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linkedin post 2021-06-05 04:50:00

linkedin post 2021-06-05 04:50:00

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ZIG-ZAG ALTERNATION. “The left-handed helix has the phosphates arranged in a zig-zag array; hence the name Z-DNA. The same Z structure has been found in crystals of tetramers d(CpGpCpG) as well as in other hexamer crystals.” https://link.springer.com/content/pdf/10.1007/978-94-009-7052-6.pdf View in LinkedIn
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linkedin post 2021-06-05 04:48:32

linkedin post 2021-06-05 04:48:32

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FRAGMENT FROM NATURE continues from last weekend and concludes this weekend on a paper from the early days of untangling the structure of DNA, by Professor Alexander Rich from MIT, featuring the unraveling of left handed DNA. The story is written in crystal clear language, with unyielding logic, an historical milestone. https://link.springer.com/content/pdf/10.1007/978-94-009-7052-6.pdf View in LinkedIn
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