ATR FTIR
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Unmixing ATR-{\mu}FTIR spectroscopic images of cross-sections of historical oil paintings
arXiv:2603.06673v2 Announce Type: replace Abstract: Spectroscopic imaging (SI) has become central to heritage science because it enables non-invasive, spatially resolved characterisation of materials in artefacts. In particular, attenuated total reflection Fourier transform infrared microscopy (ATR-$\mu$FTIR) is widely used to analyse painting cross-sections, where a spectrum is recorded at each pixel to form a hyperspectral image (HSI).
SOD1 Catalyses Thiol Oxidation to Thiosulfinates
Cu/Zn superoxide dismutase (SOD1) is canonically regarded as a superoxide scavenging antioxidant yet is paradoxically associated with multiple diseases. Here, we show that SOD1 catalyzes thiol oxidation to thiosulfinates (RS(O)SR), revealing a previously unrecognized copper mediated oxidant forming reaction in biology. Steady state kinetics demonstrate robust, O2 dependent thiol consumption, and ATR FTIR spectra of the SOD1-cysteine reaction display S--O bands ({approx}1042/1169 cm-1)...
Britain's oldest cave art may have been rediscovered in Bacon Hole cave
June 2, 2026 report Britain's oldest cave art may have been rediscovered in Bacon Hole cave Paul Arnold Author Gaby Clark Scientific Editor Robert Egan Associate Editor The oldest cave art in Britain may have been discovered, or more likely rediscovered, in a cave on the Gower Peninsula in South Wales, possibly dating back around 17,000 years. The red stripe markings on the walls of a cave called Bacon Hole were first spotted in 1912. They were hailed by their finders, Professor William...