Saturday, 14 August 2010

Blaschko's Lines

Blaschko's Lines (Wikipedia)
* "Blaschko's lines, also called the Lines of Blaschko, are skin lines invisible under normal conditions. They become apparent when some diseases of the skin or mucosa manifest themselves according to these patterns. They follow a "V" shape over the back, "S" shaped whorls over the chest, stomach, and sides, and wavy shapes on the head."

Blaschko's Lines (Pharyngula)
* "One of the subjects developmental biologists are interested in is the development of pattern. There are the obvious externally visible patterns — the stripes of a zebra, leopard spots, the ordered ranks of your teeth, etc., etc., etc. — and in fact, just about everything about most multicellular organisms is about pattern. Without it, you'd be an amorphous blob."


Posted by ALCHEssMIST - Alchemipedia - Cetacographer - Nirvana - Tags alliance.

Cargo Cult Science

Cargo Cult Science Richard Feynman
From a Caltech commencement address given in 1974.
Also in Surely You're Joking, Mr. Feynman!

* "During the Middle Ages there were all kinds of crazy ideas, such as that a piece of of rhinoceros horn would increase potency. Then a method was discovered for separating the ideas--which was to try one to see if it worked, and if it didn't work, to eliminate it. This method became organized, of course, into science. And it developed very well, so that we are now in the scientific age. It is such a scientific age, in fact, that we have difficulty in understanding how witch doctors could ever have existed, when nothing that they proposed ever really worked--or very little of it did."


Posted by ALCHEssMIST - Alchemipedia - Cetacographer - Nirvana - Tags alliance.

Luminiferous Aether

Michelson–Morley Experiment (Wikipedia)
* "The Michelson–Morley experiment was performed in 1887 by Albert Michelson and Edward Morley at what is now Case Western Reserve University. Its results are generally considered to be the first strong evidence against the theory of a luminiferous aether. The experiment has also been referred to as "the moving-off point for the theoretical aspects of the Second Scientific Revolution"."

Michelson–Morley Experiment (Science Blogs)
* "What: The famous Michelson-Morley experiment, which tried and failed to detect the motion of the Earth through the "luminiferous aether." At the time, light waves were believed to be disturbances in some medium that permeated all of space, and was fixed in an absolute sense. In this picture, objects moving through space should also be moving relative to the aether, which should cause an apparent change in the speed of light along the direction of motion."

Posted by ALCHEssMIST - Alchemipedia - Cetacographer - Nirvana - Tags alliance.

Michelson–Morley Experiment

Michelson–Morley Experiment (Wikipedia)
* "The Michelson–Morley experiment was performed in 1887 by Albert Michelson and Edward Morley at what is now Case Western Reserve University. Its results are generally considered to be the first strong evidence against the theory of a luminiferous aether. The experiment has also been referred to as "the moving-off point for the theoretical aspects of the Second Scientific Revolution"."

Michelson–Morley Experiment (Science Blogs)
* "What: The famous Michelson-Morley experiment, which tried and failed to detect the motion of the Earth through the "luminiferous aether." At the time, light waves were believed to be disturbances in some medium that permeated all of space, and was fixed in an absolute sense. In this picture, objects moving through space should also be moving relative to the aether, which should cause an apparent change in the speed of light along the direction of motion."

Posted by ALCHEssMIST - Alchemipedia - Cetacographer - Nirvana - Tags alliance.

Saturday, 31 July 2010

Artificial Sweeteners

With This Rinse, Performance Improves (New York Times, July 19, 2010)
* "Exercise scientists say they have stumbled on an amazing discovery. Athletes can improve their performance in intense bouts of exercise, lasting an hour or so, if they merely rinse their mouths with a carbohydrate solution. They don’t even have to swallow it."
* "It has to be real carbohydrates, though; the scientists used a solution of water and a flavorless starch derivative called maltodextrin. Artificial sweeteners have no effect."
* "And the scientists think they have figured out why it works. It appears that the brain can sense carbohydrates in the mouth, even tasteless ones. The sensors are different from the ones for sweetness, and they prompt the brain to respond, spurring on the athlete."

Posted by ALCHEssMIST - Alchemipedia - Cetacographer - Nirvana alliance.

Maltodextrin

With This Rinse, Performance Improves (New York Times, July 19, 2010)
* "Exercise scientists say they have stumbled on an amazing discovery. Athletes can improve their performance in intense bouts of exercise, lasting an hour or so, if they merely rinse their mouths with a carbohydrate solution. They don’t even have to swallow it."
* "It has to be real carbohydrates, though; the scientists used a solution of water and a flavorless starch derivative called maltodextrin. Artificial sweeteners have no effect."
* "And the scientists think they have figured out why it works. It appears that the brain can sense carbohydrates in the mouth, even tasteless ones. The sensors are different from the ones for sweetness, and they prompt the brain to respond, spurring on the athlete."

Saturday, 17 July 2010

Circadian Rhythm

Reindeer body clock switched off (BBC News)
* "Reindeer have no internal body clock, according to scientists."
* "Researchers found that the animals are missing a "circadian clock" that influences processes including the sleep-wake cycle and metabolism."
* "This enables them to better cope with the extreme Arctic seasons of polar day, when the sun stays up all day, and polar night, when it does not rise."