# Acme

Senior Members

2399

1. ## Digestion and stomach movements

Good question. Clearly there is some sort of signaling going on. Guess we have more researching to do... Here's something from Wiki again that seems germane:
2. ## Digestion and stomach movements

I had to go looking, but it seems there is a difference that's not dependent on the stiffness/texture. For example, this source says dairy stays in the stomach longer than fish. (Not the strong kind of reference I prefer, but it's a start.) Digestion Time of Various Food Addendum: So I found a more credible source -Stomach @ InnerBody- contradicting my supposition. They say: There is no suggestion however that the chyme is differentiated by foodtype, i.e. it is a mixture of all types consumed.
3. ## Digestion and stomach movements

I suspect once completely as I see no mechanism whereby the foods once mixed could differentiate.
4. ## Lost solution

That would be a proof by exhaustion, but since natural numbers are infinite, such a proof is impossible by any computer the same as for a people.
5. ## Digestion and stomach movements

According to Wikipedia page on stomach: The amount of time required to reduce food to chime likely depends on the amount and type of food consumed, so the total time from eating to an empty stomach will also vary.
6. ## Lost solution

The point is that you, nor I, nor any person can try all the special cases, therefore in order to say with surety "It just doesn't work AT ALL, NEVER, EVER, EVER for n > 2", a mathematical proof of the general case is required. Do you have such a mathematical proof? So you say. What proof do you have? Please direct me to your source for these assertions. Again, so you say. ? But you offer no mathematical proof, which makes your assertions uninteresting. PS Sorry MigL, you posted in between when I was voting my conscience. Hopefully some well meaning member will bind your wound and mend my error.
7. ## Lost solution

That's just a special case and not the same as a proof of the general equation. As was pointed out, there is no evidence Fermat had a proof; he simply claimed to have had one. If he did, it would most certainly be different than Wile's proof which runs some 200 pages and uses mathematics not extant in Fermat's time.
8. ## What is consciousness (pure scientific) ?

Hofstadter points out that there are levels of consciousness and that we humans acknowledge and adjudge them according to personal perceptions. Most folks don't hesitate to stick a worm on a hook whereas sticking a dolphin on a hook would be verboten. Perceptions being what they are, there is a wide latitude in our judgments, but they are based on the idea of a continuum of consciousness. Hofstadter defines the experience of consciousness as a 'strange loop'. While you may not know that or disagree with it, it is not true to say that the definition does not exist.
9. ## What is consciousness (pure scientific) ?

My preferred "purely scientific" take on consciousness: I Am A Strange Loop by Douglas Hofstadter

13. ## Most bags are the wrong shape and orientation . They fall over , often as no !

Remedy is to think outside the bag. To whit, I was using a bag similar to those pictured on my field tramps and while I liked the close contour as alluded to by Phi, I disliked the falling over as you mention. Not only would the fall let things out, it put the bag in the dirt and often wet ground and foliage. Not what I want for camera gear and notebooks. Anyway, I stumbled on what I need at the hardware store in the fishing section. A fishing gear bag! Stays upright, waterproof bottom, and bright yellow interior. Also, a molded shoulder strap that cut the bite of a straight strap. I get around the cut-out problem Phi mentions by swinging the bag to my back and have no problem negotiating snagging brush and limbs. Mine was by a company called Allen, but this particular model appears to be no longer available. Here's a photo though. (Mine lacks the orange highlights on exterior.)
14. ## How was protein synthesized from amino acids in the prebiotic world?

It is only the case that no way has yet been conceived [by you at least], and concluding from this that no way is possible is a logical fallacy. People knew for millennia that consuming willow bark/leaves could soothe pain, but no one knew how to synthesize the plant's contained acetylsalicylic acid (aspirin) until chemist Charles Frédéric Gerhard did so 1853. Scientific knowledge is a temporal manifestation. Be patient, and don't get you loin clot in a knot.
15. ## Mercury stream in space

So I was thinking to minimize vortices by using a laminar flow nozzle like they use in those dancing fountains. >> So if we get a laminar flow stream at a rate that freezes before it boils away, we have a sublimating sausage?
16. ## Mercury stream in space

If we take a gallon of mercury into space and squirt it out from a circular orifice, will it stay all together as a 'string'? All the ifs, ands, and buts entertained. Like... a string will form if the pressure is right, and the orifice is smooth, but not if too close to mass x.
17. ## Did our ancestors commit suicides?

While not 'caveman' perhaps, Native Americans committed suicide using various poisons according to David E. Jones writing in Poison Arrows: North American Hunting and Warfare. He says on pg. 6 that the reason for suicide "usually stemmed from a broken heart". He cites an early record by Father Sagard who worked among the Huron in the 1630s, and noted that the tribe used Cicuta masculata - Spotted Water Hemlock to commit suicide. The plant was known as "suicide root".
18. ## Science of homemade essential oil perfume

Lately I have taken an interest in lichens and I ran across a species in the field that is used in perfumery. (Warning! Known to cause contact dermatitis) So the lichen is Evernia prunastri, aka Oakmoss, and apparently it is used both as a fixative in perfume and it also adds a scent. Evernia pruneastri Mind that my chemistry is lame, so you'll have to evaluate the following as to applicability to your situation. fixative @ Wiki Lichens produce numerous secondary metabolites and often these are key to identifying them using chemical spot tests. I don't know how the metabolites of Evernia prunastri correlate chemically to the above Wiki blurb, but here's a rundown: Evernia prunastri @ Encyclopedia of Life
19. ## How was protein synthesized from amino acids in the prebiotic world?

I find the 'odds are immensely small' argument lame. Unlikely things, even highly, highly, highly... unlikely things, happen. Chance is as chance does and whether or not we can reproduce (or have yet to reproduce) the deterministic chain of events & conditions that led to life, life exists.
20. ## How to stop an ice-age if yellowstone volcano was to explode

It's not the gasses that block the Sun, rather it is the ash/dust thrown high into the atmosphere. The big sucker will require big storage and possibly a bagless/filterless sucking design such as those Dyson® vortex sweepers to prevent clogging.
21. ## Model Rockets

Maybe glue some thin copper foil to the nozzle to get a green flame?
22. ## Common Acronyms

p2p= pay to play f2p = free to play

24. ## Boulder Mystery

I'm told that the fella who dug the nearby pond (in the early '80s I think) says the boulder was where it is now at the time and was not excavated from the pond. No word yet on a geologist visit, however I hope to get out in the next couple weeks to give the rock a better look-over and start cataloging the lichens growing on it. I'll also poke around the immediate area and see what's to be sawn.
25. ## Setting up a home lab

This outfit has some glassware: >> Forestry Suppliers - Lab Products This one has chemicals & labware: > Photographers Formulary Inc.
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