Recent comments in /f/askscience
Washburne221 t1_jc5jr4t wrote
Reply to Is there a type of precipitation that exists on other planets but not ours? Or theoretical precipitation that doesn’t happen here? by ButIHateTheTaste
On Io, Jupiter's moon, extreme tidal forces produce intense volcanic activity. But because of its distance from the sun the surface is quite cold (-130 C) and the volcanic gasses released literally freeze out of the atmosphere, producing drifts of sulfur dioxide snow, which can be revaporized by flows of molten sulfur from the volcanoes. So Io has a sulfur cycle.
[deleted] t1_jc5jl5n wrote
S_A_N_D_ t1_jc5j4r1 wrote
Reply to comment by figmentPez in Do brine pools preserve genetic material? by Vonnie610
Protein denaturation happens because the tertiary structure is broken as the charged and polar interactions of each residue are broken or disrupted. Salt will have little impact on the peptide bond.
Death due to salinity is usually due to organisms being unable to maintain a proper intracellular osmotic balance rather than from direct protein denaturation.
Hypersaline solutions may cause some of the DNA to precipitate, however I'm not sure if it will have a net negative, or net positive effect. I'm actually leaning towards it possibly having a protective effect, but I'm not sure I have the background in biochemistry necessary to say that from a position of authority.
Overall though I expect it would be unlikely to make any measurable change to the numbers listed above, especially since the calculated half life was for samples that were buried and are therefore surrounded by a lot of minerals as well, and therefore also likely salts. I'm guessing any protective effect from our example would be insignificant.
Edit: Here is an article that does suggest high salt concentrations have a net protective effect on DNA preservation in the environment, though the study does suffer from some major limitations so we are unable to conclude to what degree this would have relative to the paper I mentioned in my first post. I expect it might skew the half life to the longer end of the range, but to what degree I can't speculate.
[deleted] t1_jc5j3dy wrote
cheesynougats t1_jc5ib8l wrote
Reply to comment by Zondartul in Is there a type of precipitation that exists on other planets but not ours? Or theoretical precipitation that doesn’t happen here? by ButIHateTheTaste
"water, acid, ash, and fish. "
Excuse me, what?
figmentPez t1_jc5hnvi wrote
Reply to comment by S_A_N_D_ in Do brine pools preserve genetic material? by Vonnie610
>it's unlikely salt water would have any significant net positive effect on preservation length of time.
Given that high salt concentrations denature proteins, I'd suspect that the opposite is the case. Salt so concentrated that it causes life to die seems like it would cause DNA to break down faster.
Shadeauxmarie t1_jc5hki7 wrote
Reply to comment by Stillwater215 in Why were the control rods in the reactor featured in the HBO series 'Chernobyl' (2019) tipped with graphite? by Figorama
Common question for Navy nuclear watchstanders: “Everyone dies on the ship. How long will the reactor run and what will cause the shutdown?”
[deleted] t1_jc5h9rx wrote
Reply to comment by echawkes in Why were the control rods in the reactor featured in the HBO series 'Chernobyl' (2019) tipped with graphite? by Figorama
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[deleted] t1_jc5fhop wrote
Stillwater215 t1_jc5caks wrote
Reply to comment by Shadeauxmarie in Why were the control rods in the reactor featured in the HBO series 'Chernobyl' (2019) tipped with graphite? by Figorama
Passively safe reactors should be the future of electricity generation. Modern reactors are designed so that the job of the operators is to “fight” the reactor to make it more reactive. If they walk away or are incapacitated, the reactor brings itself into a steady, low-power state. But whenever people think of nuclear power, they only think of Chernobyl…
[deleted] t1_jc5bch8 wrote
Reply to comment by [deleted] in Do brine pools preserve genetic material? by Vonnie610
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[deleted] t1_jc5a5yx wrote
Ayad3 t1_jc5920j wrote
Reply to Why were the control rods in the reactor featured in the HBO series 'Chernobyl' (2019) tipped with graphite? by Figorama
Why? For the same reason our reactors do not have containment buildings around them, like those in the West. For the same reason we don't use properly enriched fuel in our cores. For the same reason we are the only nation that builds water-cooled, graphite-moderated reactors with a positive void coefficient. - It's cheaper.
- Valery Legasov
[deleted] t1_jc58114 wrote
[deleted] t1_jc56gbu wrote
Reply to comment by Hiddencamper in Why were the control rods in the reactor featured in the HBO series 'Chernobyl' (2019) tipped with graphite? by Figorama
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[deleted] t1_jc55eph wrote
Reply to comment by [deleted] in Do brine pools preserve genetic material? by Vonnie610
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braize6 t1_jc557p6 wrote
Reply to Why were the control rods in the reactor featured in the HBO series 'Chernobyl' (2019) tipped with graphite? by Figorama
Off topic, as someone who operates kia nuclear power plant, the Chernobyl incident absolutely infuriates me every time I hear about it. The RBMK is just..... wrong. It's bass ackwards, and completely dangerous (obviously)
That said, Chernobyl is a great show. "Go on, tell your lie"
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[deleted] t1_jc50nf8 wrote
[deleted] t1_jc5066j wrote
jobblejosh t1_jc4z2bf wrote
Reply to comment by Hiddencamper in Why were the control rods in the reactor featured in the HBO series 'Chernobyl' (2019) tipped with graphite? by Figorama
Also gives a great look into why it's named RBMK. Reaktor Bolshoy Moshknosti Kanalnyy; High-power Channel-type reactor; since the cooling water is sent through individual channels as opposed to being in one large pressure vessel.
[deleted] t1_jc4z1cc wrote
haribobosses OP t1_jc4yjva wrote
Reply to comment by Solid-Warning8793 in Why does the armpit smell so different than the other sweaty parts of your body? by haribobosses
So with enough sweat I can get my balls to smell like BO?
Solid-Warning8793 t1_jc4vvyk wrote
Reply to comment by haribobosses in Why does the armpit smell so different than the other sweaty parts of your body? by haribobosses
Researched. It should be in the sweat glands section of physiology textbooks
[deleted] t1_jc5kxw4 wrote
Reply to Why is death by respiratory failure in cases when the problem is only muscular (and not a problem with the lungs themselves) so prevalent? why is it so hard to assist respiration long term? Why are ventilators so unsophisticated and brutal on the lungs? by Eschatologists
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