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Amyotrophic lateral sclerosis ( ALS ) – also referred to as motor neurone disease in some Commonwealth of Nations countries and as Lou Gehrig 's disease in the United States – is a debilitating disease with varied etiology characterized by rapidly progressive weakness, muscle atrophy and fasciculations , muscle spasticity , difficulty speaking ( dysarthria ), difficulty swallowing ( dysphagia ), and difficulty breathing ( dyspnea ). ALS is the most common of the five motor neuron diseases . [ edit ] Signs and symptoms The disorder causes muscle weakness and atrophy throughout the body caused by the degeneration of the upper and lower motor neurons . Unable to function, the muscles weaken and atrophy . Individuals affected by the disorder may ultimately lose the ability to initiate and control all voluntary movement, although bladder and bowel sphincters and the muscles responsible for eye movement are usually, but not always, spared until the terminal stages of the disease. [ 1 ] Amyotrophic lateral sclerosis
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The 100 Top Science Stories of 2010 | Prehistoric Culture
Ernest Rutherford’s Nucleated Century The critical discovery in this atomic model emerged a century ago in a talk before the Manchester Literary and Philosophical Society in March 1911 and a paper published soon after in the Philosophical Magazine. Both were by Ernest Rutherford, who had won the 1908 Nobel Prize in Chemistry in part for his discovery of the alpha particle, which he later proved was the nucleus of a helium atom. By 1911, scientists had already measured the charge and mass of an electron. But no one was sure how the atom was structured.
Prof. Robert Zoellner, with a model of the molecule created by ten year-old Clara Lazen I don't know about other people, but when I was a child, I was inventing things such as a musical instrument made out of a folded piece of cardboard and some rubber bands. Ten year-old Clara Lazen, however, has done something a little more noteworthy. The fifth-grader from Kansas City, Missouri, built a model of a molecule that is new to science. If the molecule itself were to actually be created, it could possibly be used for energy storage, or in explosives. Child creates molecule that could be used for energy storage or explosives
The more we understand about science and its complexities, the more important it is for scientific data to be shared openly. It’s not useful to have ten different labs doing the same research and not sharing their results; likewise, we’re much more likely to be able to pinpoint diseases if we have genomic data from a large pool of individuals. Since 2004, we’ve been focusing our efforts to expand the use of Creative Commons licenses to scientific and technical research.
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Otherwise, there are a quite a lot of sites out there covering physics and biology at this level, but my impression of them is that they would be good for revision, but not so good if you were struggling to understand something in the first place. If you want to find what is available a Google search on "a level" physics or "a level" biology should throw up a good selection. If you are doing some other exam - IB, for example, or Scottish Highers - you could try searching for these in a similar way, but it would still be worth looking for A level sites (and vice versa for A level students). physics and biology sites
Specials archive : Nature
Prokaryotes, Eukaryotes, & Viruses Tutorial
chemistry - few periodic rules to rule them all :)
An Introduction to Lead | greenopedia Lead is a highly toxic metal, whose neurotoxin has had sickening and deadly affect on humans for almost 3,000 years. And lead is still found in harmful quantities in a frighteningly large array of consumer products today. Why is such a toxic metal still in our products and in our homes?
Organic Chemistry Animations ChemTube3D
CHEM 1211 COURSE CONTENTS CHEM 1151 LECTURE - GPC, Dunwoody Most of the lectures will be based on the PowerPoint notes below (~70%), and these will be reinforced with some additional board work (~30%).
Virtual Laboratory: Thermodynamic Equilibrium Here is a snapshot of the applet. Read the instructions and then go to the links at the bottom of this page to activate various kinds of experiments that can be done with this applet.
Click chemistry was first fully described by K. Click chemistry
Understanding Chemistry - interesting links
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Read full article Continue reading page | 1 | 2 | 3 | 4 | 5 | 6 Read more: 13 more things that don't make sense
this is evidenced over the years... in mental health, modern perception and understanding is that people experience episodes of poor mental health, such as psyshosis. today these are regarded as such in the more advanced mental health circles. in the past, and unforunately in many traditional mental health services, a diagnosis of schitzophrenia was/is slapped upon these people... effectively telling them they have a life long serious mental illness, and the conditioned trust of doctors they hold, effectively makes these people suffer from lifelong mental illness!!!
Scientists at NASA's Jet Propulsion Laboratory have put out a new video to address false claims about the "Mayan apocalypse," a non-event that some people believe will bring the world to an end on Dec. 21. In the video, which was posted online on March 7, Don Yeomans, head of the Near-Earth Objects Program Office at NASA/JPL, explains away many of the most frequently cited doomsday scenarios. [ See video ] Addressing the belief that the calendar used by the ancient Mayan civilization comes to a sudden end in December 2012, and that this will coincide with a cataclysmic, world-ending event, Yeomans said: "Their calendar does not end on December 21, 2012; it's just the end of the cycle and the beginning of a new one. It's just like on December 31, our calendar comes to an end, but a new calendar begins on January 1." NASA video crushes 2012 Mayan apocalypse myth
We like to feel superior to the people who lived centuries ago, what with their shitty mud huts and curing colds by drilling a hole in their skulls. But we have to give them credit: They left behind some artifacts that have left the smartest of modern scientists scratching their heads. For instance, you have the following enigmas that we believe were created for no other purpose than to fuck with future generations.