for - progress trap - deep sea metallic nodes produce oxygen - deep sea mining can disrupt

• for: polysomnograph, oxygen saturation levels, graph - sleep apnea, sleep apnea - monitoring

• description: sleep apnea oxygen saturation process

  • oxygen saturation cycles through the night with peaks and troughs
  • abdominal movement attempts to draw air in but is obstructed
  • when a threshold of oxygen deprivation occurs, the brain wakes up and awakens the person to remove the obstruction

does this still hold up? the wikipedia lemma points to several more recent sources that seem to offer counter information https://en.wikipedia.org/wiki/Rare_Earth_hypothesis#Free_oxygen_may_be_neither_rare_nor_a_prerequisite_for_multicellular_life The source of the claim seems to be the book itself, so would need to look it up in Ward Brownlee 2000, page 217

Ward in the context of Rare Earth hypothesis says this. An intriguing notion seeing thinking as a form of (deliberate) movement. How is this meant / to be understood? Chemically, in terms of what it requires in an animal (ie us)? The remark is made in the context of the need for oxygen for complex life to be possible. (based on David Catling Univ of Washington) after all. Or environmentally/contextually, as both deliberate physical movement and brain activity are response to outside impulses?

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Jennifer K McDonald. (2021, October 16). Here’s the rebreathed fraction of air table from the all-knowing @DavidElfstrom [Tweet]. @JenniferKShea. https://twitter.com/JenniferKShea/status/1449380211435479047

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Summers, C. (2021, June 8). Oxygen shortages are killing thousands. Why aren’t we doing more about this? | Charlotte Summers. The Guardian. http://www.theguardian.com/commentisfree/2021/jun/08/oxygen-shortages-killing-vaccines-drugs

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Swenson, A. (2021, April 20). Study lacks evidence on masks, isn’t linked to Stanford. AP NEWS. https://apnews.com/article/fact-checking-629043235973

Gupta, R. K., Marks, M., Samuels, T. H. A., Luintel, A., Rampling, T., Chowdhury, H., Quartagno, M., Nair, A., Lipman, M., Abubakar, I., Smeden, M. van, Wong, W. K., Williams, B., & Noursadeghi, M. (2020). Systematic evaluation and external validation of 22 prognostic models among hospitalised adults with COVID-19: An observational cohort study. MedRxiv, 2020.07.24.20149815. https://doi.org/10.1101/2020.07.24.20149815

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Covid eruption in Brazil’s largest state leaves health workers begging for help. (2021, January 14). The Guardian. http://www.theguardian.com/world/2021/jan/14/brazil-manaus-amazonas-covid-coronavirus

London buses turned into ambulances to ease Covid strain. (2021, January 21). The Guardian. http://www.theguardian.com/world/2021/jan/21/london-buses-turned-into-ambulances-to-ease-covid-strain

Gupta, R. K., Marks, M., Samuels, T. H. A., Luintel, A., Rampling, T., Chowdhury, H., Quartagno, M., Nair, A., Lipman, M., Abubakar, I., Smeden, M. van, Wong, W. K., Williams, B., & Noursadeghi, M. (2020). Systematic evaluation and external validation of 22 prognostic models among hospitalised adults with COVID-19: An observational cohort study. European Respiratory Journal. https://doi.org/10.1183/13993003.03498-2020

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So this is a limited BOD sensor for only the subset of organic compounds that E. coli can metabolize?