John Cuthber

because the correct reaction is H2 + CuSO4 ---> H2SO4+ Cu? And, in principle, that works. In practice you ned a catalyst like platinum.

How do you know that? In particular, how do you "know" that methanol (which shouldn't be there) comes off first even though acetaldehyde has a lower boiling point? https://en.wikipedia.org/wiki/Methanol_toxicity says Methanol poisoning can be treated with fomepizole, or if unavailable, ethanol may be used.[7][13][14] Both drugs act to reduce the action of alcohol dehydrogenase on methanol by means of competitive inhibition. Ethanol, the active ingredient in alcoholic beverages, acts as a competitive inhibitor by more effectively binding and saturating the alcohol dehydrogenase enzyme in the liver, thus blocking the binding of methanol. Methanol is excreted by the kidneys without being converted into the very toxic metabolites formaldehyde and formic acid. Alcohol dehydrogenase instead enzymatically converts ethanol to acetaldehyde, a much less toxic organic The mechanism is comparable for glycol, where the ethanol keeps the enzyme too busy to make oxalic acid. That's sensible; you get rid of a lot of rubbish that way

That appears to be the answer to the question where does the methanol go to. An interesting question in its own right, but not the one I asked. There's not much pectin in grain, potatoes or most grapes. There's a bit of low boiling crap in most wash- commonly acetaldehyde. The density of ethanol and methanol are pretty damned similar; about 0.79 You can't really see a change in density- only a change in refractive index and ethanol and methanol are pretty similar on that score 1.36 vs 1.33 . If there's any methanol present in the distillate then it must have been present in the wash. If drinking that wash won't kill you due to methanol poisoning then the same is true of the product. So any of the millions of "homemade wine" recipes will give you a product that , when distilled, won't contain enough methanol to kill you. One of the most effective antidotes to methanol poisoning is ethanol. The only ways to get methanol poisoning from moonshine involve being fundamentally stupid. You can either selectively collect the distillate with the wrong boiling range (and throw away the actual ethanol which would save you) or you can start with something like industrial meths which contains a lot of methanol. The thing about methanol in moonshine is that it's mainly a bogey man set up by law enforcement to protect alcohol duty revenue. I am not going to comment on any practical knowledge I may have about methanol tasting sweet but ethanol tasting bitter.

I have a feeling I have seen that particular word salad elsewhere. It didn't go down well with scientists.

The most likely explanation is simply that they are clueless.

The real question is why they think you can boil something at 120 F. That, together with the impossible yield and the nutrient poor recipe, suggests to me that you should not seek guidance from that site.

And where would the methanol come from? That's what I thought.

About 95% of the population don't live in the USA. In the UK I can make pretty much as much wine and beer as I want, but I can't legally distill (including "freeze distillation") or sell it. So, I can tell you that the recipe needs nitrogen and phosphorus. Diammonium phosphate is traditional. I can also tell you (because I'm a scientist) that anyone who thinks you get 9 jars of "moonshine" from a gallon of sugar and bread-yeast is either nuts or has a very weak drink.

Moonshine...

Titanium dioxide, which is a very popular white pigment, absorbs UV rather well. https://www.researchgate.net/figure/UV-Vis-Diffuse-reflectance-spectrum-of-bare-TiO-2-nanoparticles_fig6_320324473 Plain cellulose (and therefore, cotton) doesn't absorb near UV but it does scatter or reflect it. https://www.researchgate.net/figure/UV-Vis-diffuse-reflectance-spectra-of-pure-cellulose-a-cellulose-film-with-stamen-like_fig3_319232616

No. Sodium cholate is not an enzyme. In principle, you can obtain the cholic acid from bile- if you can get that.

"Do we really need complex numbers?" It depends on whether or not you want to be able to solve quadratics. If you want solutions, then you have to put up with complex numbers.

Am I the only one who regrets the passing of metal biscuit tins and their replacement by plastic ones?

Ever heard of photosynthesis?

Estimates vary but the current approval rating of the government is about 20%. The government is opposing a general election on the basis that the population would kick them out. That's not democratic. There's also the underlying problem; the current government was elected even though most voters preferred a different party. We need a new electoral system to replace "first past the post".

The wash cycle will have done a pretty good job of removing bacteria and mould spores. So, even if the pillow was just sitting in the drier, there won't have been much microbiology happening.

People would pay me not to play. It's interesting. I recognise the desire to teach kids the value of work. But, if you pay them to do chores, you undermine the idea that they should do them simply because they need to be done.

That's still magic, not medicine.

That's a matter of definition. https://en.wikipedia.org/wiki/Nickel_allergy#Epidemiology

A vacuum is a much better insulator.

Yes

I'm not saying it's a good idea but... If you use solar power to drive the cooler then the heat (including the waste heat from the electrics etc) is exactly the same as if the sunlight just warmed up thee ground. The conservation of energy leads to the question "how could it be different?". I realise the temperature of lakes will go up more or less in line with global warming. But is there any reason to believe that the lakes are particularly susceptible? Why focus on cooling lakes rather than, for example, cooling fields?

Unfortunately, I can't see that being cost effective. There's no reason to assume that lakes are much warmer than they were before mankind got involved.

Freeze it until it's not "rubbery" then machine it quickly.

What on earth did you study?