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https://news.engineering.utoronto.ca/passing-the-acid-test-new-low-ph-system-recycles-more-carbon-into-valuable-products/
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https://arxiv.org/abs/hep-ph/9304300
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Abstract page for arXiv paper hep-ph/9304300: The Motion of Massive Test Particles in the Dark Matter with an $a_0/r^2$ Energy Density