joigus

Prof seems to be one of the most-oft-misread people since Nostradamus.

This has been mentioned and references, etc., given. Mentioned also, and references given. Extreme pH I would expect to more drastically change properties of macromolecules. But I haven't thought about it. Amino acids are notorious for being acidic and basic at different pH's, so they have a multiple-point sigma titration curve, if I remember correctly. If you wish to introduce this into the topic, you're welcome to do it. Please, give references.

Neither can I. When I reached that point, I decided to go for a joke.

Sorry I wasn't clear. Thermodynamics is not a force. You have energy stored in macroscopic systems. But a big part of it is lost. It's invested in pushing and pulling, and shoving atoms against each other, and changing their rotational states, and so on. A small part of it you can use if you want, and you're clever enough to use it efficiently, and transform it into work (force times displacement). So there is a fraction that can be used as force. But thermodynamics is pretty much about no matter what you do, a lot of the energy content is unattainable.

Pressure times surface certainly gives you a force. That's thermodynamics. Does that help?

Who said this? Thermodynamics is not a force. Mess in the quote function, sorry. Here it is. There are differences between Helmholtz's and Gibbs' free energy --as said before. An example from non-equilibrium thermodynamics is the energy stored in ATP molecules in a living organism. They certainly can do work. An example from equilibrium thermodynamics is the slow expansion of a gas.

Oh, no. No!!! We will never see the end of this. It's like... who do you love most, your mum or your dad?, what came first, the egg or the chicken?, who was Jack the Ripper? Ok. My answer is...

"Counterdicing" sounds like something you would do to a potato or an onion, and very dangerous to your fingers.

As Swansont has pointed out, no. Earth's forests didn't thrive, e.g., during the Permian --globally, and long before humans existed--, and fought a battle to death with the big herbivores in the past --think of grazing dinosaurs. They're still fighting that battle. Animals like the elephant, deinotherium, mammoths, etc. are (and have been) largely responsible for forest disappearing in big patches. You also forget many other factors, like weathering of rocks (depletes the atmosphere from CO2), volcanism (fills the atmosphere with CO2 among other things). The other things you miss is what Beecee tells you: Milankovitch cycles are known to have an important effect in the cooling and warming cycles of the Earth. And Mikhail Budyko showed that, were the Earth to suffer a period of cooling hard enough for the polar ice caps to get to 25-30 degrees latitude, the albedo effect would be so powerful that the total freezing of the Earth would be unstoppable, reaching even the equator. So: is also incorrect in general, over geological-scale time periods. We know this happened in the past because there are regions in Australia and America where rock patters show that the sand was under a cover of ice, and yet, due to magnetisation patterns, we know they were on the equator at that time. This was previous to the Cambrian, though, and it is not believed that it would likely happen again.

Non-linearity is expected in anything related to gravity off the low-field approximation, ever since 1915. Much more unexpected is "counterdicing of time." Before trying to get a full grasp of it, what about a rough grasp of it first? So let's start with a simple question: What is "counterdicing of time"?

I can't make heads or tails of any of this.

Quick freezing/slow defrosting... Keys to yummier food. As I understand, it's a question of texture. I wonder how significant all this is nutritionally. I've read that, after a while, pretty much every macromolecule that you take in is broken down into monomers. The gastric juices are mostly hydrogen chloride, very acidic. Somehow, your metabolic system is not "interested" in having carrot cellular tissue, but the amino acids it's made of, and such.

Very interesting. Thanks a lot, @StringJunky.

Thanks a lot for the answers, @studiot and @iNow. Thanks also to you, @dimreepr. I would like to know whether it's in the proteins or the polisaccharides, though. As well as loss in nutritional value. I should think it doesn't make that much of a difference nutritionally though, as pretty much everything "poli-" (protein or otherwise) hydrolyses in the gastric juices, and is broken into monomers.

All of them? Blanch them first not matter which? Potatoes, carrots, cabbage...

Easy come, easy go.

I agree too. @Prof Reza Sanaye has an interesting way of saying things that are absolutely spot-on, and then trying to clarify by sending what to me looks like impenetrable clouds of philosophical fog.

I've observed that carrots don't keep well in the freezer if you just put them there. They deteriorate considerably in texture, suggesting to me that some denaturation is going on. After googling for it, I've found that it's recommended that you "blanch" them first, which amounts to washing them, removing differently coloured spots, cutting them in dices or slices, and boiling them shortly. Does anybody know the molecular basis for this? Can any general rules be applied for vegetables depending on the content in starch, carotenoids, etc.?

It was a long way away from Sidney, last time I took a look at the maps, @beecee. Continental drift is not nearly as quick as it takes.

And this is my gift for you, Markus (lotus flower in full blossom in Thailand):

As a Mahayana Buddhist would say: Great faith, great doubt, great determination. May you find your Buddha nature, my dear friend, whether be it Theravada or Mahayana way, or any other honest and sincere way, it's a worth pursuit. Best luck.

https://www.facebook.com/lynnmiclea.author https://www.facebook.com/lynnmiclea.author

Where do these words come from? Sorry, I'm lost.

This is the more trustworthy version, I think: https://www.goodreads.com/quotes/271951-you-do-not-really-understand-something-unless-you-can-explain My grandma --my father's mum-- always beat me at chess --before I learnt some strategy with my brother, but by then she'd already passed away--, so I guess I'm not fully qualified to qualify anything here. If that's what Einstein really said, and he was right, maybe it just means we cannot ultimately understand anything.

Professors are neither less nice nor more than the average person, in my experience. They're far busier than the average person though. Paperwork, teaching, exams, research, other academic duties... Work tends to spill over out of hours. Two days without getting an answer is not enough to judge a person as "an asshole" IMHO.