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Glider

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Everything posted by Glider

  1. Most processed food contains too much salt anyway.
  2. As far as I remember, the primary structure of a protein refers to the order of amino acids in the peptide chain (unique to each protein). The secondary structure refers to the conformation of the protein in space; Alpha helix, Beta-pleated sheet and so-on. The tertiary structure refers to the conformation of a protein in relation to those around it in a functional unit, as in for example the four-unit globin complex in haemoglobin. As for your other questions, I'm afraid I don't know.
  3. Cramp can be cause by low sodium. Part of the reason soldiers are given salt tabs for training in hot/dessert conditions. Sweating hard, you lose a lot of sodium. Bananas are a good source of potassium. Hardly any sodium in them though.
  4. Yes. Maintaining concentration is harder when you're tired and you're more likely to drift off into your own little world. This is why people find some repetetive tasks 'theraputic'. They don't have to think about doing them and so can get them done whilst thinking about other things.
  5. Glider

    Egg Cells

    No. Basic biology in secondary school, when I was about 14. About 0.1mm dia. as far as I recall.
  6. To see the effect, you need to either see it on TV or film (anything with a fixed refresh rate) or under artificial lighting, particularly flourescent lighting (which also has a flicker of around 60 hz). As swansont said, it's a strobe effect. You can't see it in natural light. Whilst retinal cells do have a kind of refresh rate, they don't all refresh in phase. Moreover, the 'refresh' is buffered by the action of retinal ganglion cells. Many photoreceptors project to a single ganglion cell via bipolar cells, and are also connected to each other by horizontal cells (both rods and cones). Bipolar cells are also connected to each other by amacrine cells, so the signal the ganglion cells receive is the net activity of a number of photoreceptors, so it doesn't matter that each photoreceptor is refreshing individually. The net activity remains unaffected.
  7. Withdrawing your hand from a hotplate is a reflex. Reflexes are different to automatisms. Reflexes are hard-wired and universal to the species. You don't have to learn them, you are born with them. Automatisms are learned behaviours, like riding a bike or playing a piano. With constant practice you can become extremely proficient at a motor task, to the point where it no longer requires conscious input once the behaviour has been initiated. This is why experienced pianists can hold a meaningful conversation whilst playing a piece with which they are familiar. Conscious input is only required to modify the action (e.g. increase/decrease tempo). However, even an expert pianist could not play a piece with which they were unfamiliar, and hold a conversation. One or other activity would suffer. Most people who drive cars cars at some point will have had the experience of arriving at some point with no recollection of how they covered the last few miles. They have been thinking about other things, and all actions required to drive; gear changes, speed adjustments and steering were performed automatically. This does not happen to novice drivers. Automatisms happen through a process of cerebellar learning and automatic processing. The cerebellum is responsible for motor skills learning. Once a particular skill has been learned (e.g. playing a scale), conscious input is only required to initiate the process. Once initiated, the motor action will continue until you provide the conscious signal to stop. Whilst the action is being performed, you monitor the results using very little conscious resource. In the case of playing scales, you don't need to look at your hands, you can hear the notes, even over a conversation. If the notes are correct, you notice very little, perhaps not even consciously registering the notes. However, if you hit an incorrect note, you are alerted and correct the action, which then continues automatically. This, with enough experience, you do without thinking.
  8. Glider

    Egg Cells

    No, a chicken egg is not a single cell. The oocyte is the single cell. The oocyte in a chicken egg is located on the membrane surrounding the yolk sac. If you break open a fertilized chicken egg, you can see the zygote resting on the yolk sac, and blood vessels extending from it. forming a network around the yolk from which it draws nutrients for growth. The egg is just a 'life-support' capsule for the embryo.The fillaments projecting from each end of the yolk sac attach to each end of the shell and act as shock absorbers, keeping the yolk more or less central in the mass of albumin (egg-white). The yolk provides the nutrients for growth and the white provides the water and some protein.
  9. Behaviours that require no conscious input once they have been initiated are called automatisms.
  10. I think that rather assumes tazer owners are infallable judges of character and intent, rather than, as is more likely, scared people who are anticipating attack.
  11. Use tung oil, teak oil or linseed oil. These are most commonly used to strengthen and preserve bare wood and to improve its appearance. Teak oil will give it a little colour, tung oil will give it a bit of shine in time.
  12. I don't mind fronting out someone who can crack their own neck. It's someone who I think could crack mine I'd avoid.
  13. I doubt it pains anyone here . I certainly have no issue with it. My issue is with those who take up the banner of Christianity (or any religion) and use it to beat others over the head. They use it to promote intolerance, division hatred and violence. For some reason they annoy me even more than those who promote the same things, but openly and with conviction. I don't know why that is. Perhaps it's the sugar coating of righteousness that makes their poison even more bitter (oooh...poetic!). I don't think all Christains are hypocrites. I haven't met enough of them to make that call. I don't even think Christianity is bad. The reading I have done tells me that the philosophy behind it is good, which makes it harder to swallow the crappy things people do in its name. No worries. It wasn't directed at religious people, it was sarcasm directed at truelove. I know sarcasm is the lowest form of wit, so I reserve it for use on the lowest form of wit.
  14. Regular coke contains a lot of sugar in solution, which makes regular coke denser than water. Diet coke contains no sugar.
  15. It's not so much thinking too much, it's thinking the wrong things, or more accurately, a negative bias to you thinking. The first line of your post says "...thinking all the stuff you have to do tomorrow and all the stuff you messed up on that day". This focusses on the negative aspects. The stuff you have to do and the stuff you messed up. That same line could have read "...looking forward to all the stuff you're going to do tomorrow, and all the stuff you schieved/completed/enjoyed today". Everyone has stuff they have to do, and everyone screws up now and again. But these are only a part of daily life, and not everyone focusses on those aspects when they think about things. Most people, having done the stuff they have to do, go on to do stuff they want to do. Most people, after screwing up will think "ok...that was a screw-up. Now to fix it/do something else". Day to day life is usually a mix of good and bad things. If, when you're thinking, you focus only on the bad things, you are going to get depressed. More important is that this thought pattern can become habit; focussing on the negative and ignoring the positive. It's a depressive cycle and can do you harm. Not thinking about anything won't help, because that just avoids/supresses the problem. Try to balance things out, if you find yourself thingking about negative stuff, try to remember some positive stuff as well. Perhaps the best thing to do is to take control. If you find yourself thinking about all the stuff you have to do tomorrow, rather than thinking "Awww...bummer!" Try thinking "Ok, what's the best way to get all this stuff done?". If you find yourself thinking about stuff you messed up on, rather than thinking "Aww geez, I screwed up again!", try thinking "Ok, that was dumb, but nobody died and nobody got pregnant, so what should I have done?". This way of thinking lets you take back some control and allows you to deal with the problems. You'll start getting through all the stuff you have to do more quickly, and screw-ups will become rarer and you'll avoid screwing up the same way twice. When that happens, you'll find they don't depress you any more.
  16. Not at all. I meant that Truelove is a hypocrite. I haven't met all Christians so I have no grounds to assume that all Christians are hypocrites. I'm sorry you feel that way, but I don't see how. I'm glad to hear it. if you are sure my comment wasn't directed at you, how were you offended by it? Perhaps you were seeking offence where there was none intended? "If you are distressed by anything external, the pain is not due to the thing itself, but to your estimate of it; and this you have the power to revoke at any moment". (Marcus Aurelius Antoninus; Meditations: 167 A.C.E.)
  17. Veins of quartz are commonly found in slate.
  18. We had to stable it for a week when it was in London on a tour. It was kept in the Charger lines for security. Right twitchy bugger it was too.
  19. I like Debussey. I particularly like guitar; Francisco Terrega, Isaac Albeniz, Enrique Granados, Gaspar Sanz, et al.
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