# Key Points from IRC Log

• A discussion about using ultrasound to apply forces to fluids in sealed chambers explored various applications, with participants noting that ultrasound is inherently AC and would require flow rectifiers (check valves) to create DC forces, similar to how optical tweezers work with solids.

• Fenn investigated the nootropic effects of butter, specifically phosphatidylserine (a NMDA receptor co-agonist), noting that Atlantic mackerel contains high concentrations (480ug/g) comparable to brain tissue, which could be a better source than cow brain extract that risks BSE contamination.

• A user shared the Makibox A6 3D printer design (with moving X-Y and Z plate) as potentially useful for biomaterial printing, with subsequent discussion about the limitations of individual cell pick-and-place methods being inefficient for bioprinting.

• Nmz787 proposed using Fresnel lenses as reflectors for microscopy and spectrometry, suggesting that metal-sputtered replicas would be easier to produce and wouldn't suffer from chromatic aberration, though participants noted potential diffraction artifacts at the edges.

• Kanzure shared an "actually transhumanist declaration" and text about the proactionary principle on the DIY wiki (diyhpl.us), reflecting ongoing efforts to articulate transhumanist principles and philosophy.

• A Scientific American article was shared about a woman who developed bone growth in her eyes after cosmetic stem cell surgery, highlighting the risks of unregulated stem cell procedures.