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[Graknorke]

It makes sense for jazz to be big in Africa, since in America it was very much a black thing™. Ditto with reggae and associated subgenres (except not America).

[Yoink]

I actually feel quite offended by the claim that jazz is an American thing, although I suppose my very most favouritest jazz band ever is American...

Should probably be more offended by the implication that hardly anyone listens to jazz anymore.
Jazz is love, jazz is life.


...Goddamnit, now I've gone from listening to death metal to ragtimey jazz. What a headfuck.

[scrdest]

I actually feel quite offended by the claim that jazz is an American thing, although I suppose my very most favouritest jazz band ever is American...

Should probably be more offended by the implication that hardly anyone listens to jazz anymore.
Jazz is love, jazz is life.


...Goddamnit, now I've gone from listening to death metal to ragtimey jazz. What a headfuck.

Go listen to Diablo Swing Orchestra to ease through the transition

[Frumple]

... jazz is considered an american thing because the genre was invented in the US. That's where it originated and where it originally popularized. It's not a statement of what nation(s) currently have notable jazz scenes (though the US still produces plenty), just a fact of music history.

[sprinkled chariot]

Why caffeine makes you nervous?
Any suggestions on something capable of replacing the coffee in role of energy booster?

[Frumple]

It's a stimulant, and that's just how some people react to those, so far as I'm aware. Biology getting amped up makes some folks jittery/nervous.

To the latter... mostly no. Caffeine's one of the weaker commercially available stimulants, s'far as I can recall, so if it's making you jittery pretty much anything else fitting in the same role is likely to be either as bad or worse. Still, could try tea (which is also caffeinated, but usually marginally healthier for you than coffee), could try decaff coffee (which is sometimes not entirely caffeine free, just reduced amounts), could try one of the various herbal things (just go to a vitamin/health shop or somethin' and ask, check the ingredient list for caffeine so you know what to avoid) -- guarana (which contains caffeine :V) and ginsing are common ones, ferexx... could try weaning yourself off caffeine entirely (some people report a general increase in energy after getting off of caffeine dependence/regular use). Healthier living in general can help with that, though that's obviously something more long term than short-term energy supplement.

Mostly, would recommend looking up energy supplements in general and start trying them out. Different folks' biology reacts differently to to different substances, so there's no real way to find what works with you besides experimentation.

[Arx]

Caffeine prevents reabsorbtion of adrenaline, IIRC, which means that you're on a constant mild fight-or-flight high. Yeah, if caffeine gives you the jitters you're better off doing something to head off the need for a stimulant instead.

[Graknorke]

You mean like the active site in enzymes?

[scrdest]

What's the name of the molecules/atoms that can 'attach' to proteins, such as iron found in haemoglobin?

Internet's not helping me right now, and the name is barely escaping me.

Ligands? It's a slightly more general term, but it should be what you need.

Alternatively, cofactors.

[Sheb]

How much more efficients are metal wheels on metal rails than rubber wheels on road?

[Sheb]

Yeah, although some cofactors (NADH for example), aren't really part of the protein structure and are more like really common substrates.

[Helgoland]

How much more efficients are metal wheels on metal rails than rubber wheels on road?

As a sort of zeroth approximation you could probably compare prices of cargo delivery via rail vs same price for delivery via road.

[i2amroy]

How much more efficients are metal wheels on metal rails than rubber wheels on road?

As a sort of zeroth approximation you could probably compare prices of cargo delivery via rail vs same price for delivery via road.

You'd probably need to adjust a bit closer together than whatever you got though; trains are intrinsically designed to carry larger bulks than trucks are (at the expense of not being able to go on roads everywhere), so they get a bit bigger discount due to being able to carry more per trip than trucks do (which are limited in scale by the size of the roads).

[Sheb]

Yeah, too much varies for it to be a good comparison. My question could also be phrased: are trains on tracks more efficients than trains on not-track?

[Frumple]

It's been way too long since I've been involved with anything regarding trains to be able to speak with surety or authority, but the answer that, at least, is (I'm fairly sure), yes. It doesn't really have anything to do with... I guess you're asking about gas mileage or something? Though, iirc. More to do with weight and infrastructure damage -- you could get a wheeled vehicle as heavy as a train going about the same speed with rubber and concrete -- probably even netting about the same mileage and direct maintenance costs and whatnot -- from what I recall, there just wouldn't be much of a road left after it came through. The scaled down version of that is basically what semi-trucks are, especially the multi-compartment ones, and they already do hella' damage to roads and surrounding buildings, just by dint of passing by.