Nuclear reactor and power plant simulation
Introduction This is not a lesson like the others in Radioactivity and Atomic Physics Explained but it fits in well with the lesson on nuclear power. It is a very sophisticated simulation of a pressurised water reactor (PWR), which is the most common type of nuclear power reactor in the US but not in Europe, though the principles are very similar.
The Cell and its Organelles
Lists of Nobel Prizes and Laureates The Cell and its Organelles Play the Incredible Megacell Game About the game
Pavlov's Dog
Lists of Nobel Prizes and Laureates Pavlov's Dog Play the Pavlov's Dog Game About the game Conditioned reflexes are reflexes you can learn compared to unconditioned reflexes that are built-in, or natural.
The Ductile Helix: "Jumping Genes" May Influence Brain Activity
Mobile DNA molecules that jump from one location in the genome to another may contribute to neurological diseases and could have subtle influences on normal brain function and behavior, according to a study published October 30 in Nature. (Scientific American is part of Nature Publishing Group.) Retrotransposons are mobile genetic elements that use a copy-and-paste mechanism to insert extra copies of themselves throughout the genome. First discovered in plants about 60 years ago, they are now known to make up more than 40 percent of the entire human genome and may play an important role in genome evolution (pdf). Researchers from the Roslin Institute in Edinburgh, Scotland, have now comprehensively mapped retrotransposon insertion sites in the genomes of normal human brain cells for the first time. Their analyses identified more than 7,700 insertion sites for L1, the best-characterized retrotransposon family that was already known to be active in brain cells.
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The Split Brain Experiments
Lists of Nobel Prizes and Laureates The Split Brain Experiments Play the Split Brain Experiments
Nerve Signaling
Lists of Nobel Prizes and Laureates Nerve Signaling Play the Nerve Signaling Game About
The Illustrated Guide to Epigenetics
Illustrations by Joe Kloc This month marks the ten-year anniversary of the sequencing of the human genome, that noble achievement underpinning the less noble sales of 23andMe's direct-to-consumer genetic tests. To commemorate the scientific occasion, we've created an illustrated introduction to one subfield of genetics likely to produce even more dubious novelty science projects someday: epigenetics. What is epigenetics?
MRI
Lists of Nobel Prizes and Laureates Play MRI the Magnetic Miracle Game About the game In the MRI imaging technique, strong magnets and radio waves are used for getting images of inner organs made of soft tissue, compared to X-ray imaging where you get images of hard tissue, like bones and teeth. Read More »
List of cognitive biases
Systematic patterns of deviation from norm or rationality in judgment Cognitive biases are systematic patterns of deviation from norm and/or rationality in judgment. They are often studied in psychology, sociology and behavioral economics.[1] Although the reality of most of these biases is confirmed by reproducible research,[2][3] there are often controversies about how to classify these biases or how to explain them.[4] Several theoretical causes are known for some cognitive biases, which provides a classification of biases by their common generative mechanism (such as noisy information-processing[5]). Gerd Gigerenzer has criticized the framing of cognitive biases as errors in judgment, and favors interpreting them as arising from rational deviations from logical thought.[6]
Epigenetics
Epigenetics PBS air date: July 24, 2007 CHEERFUL NEIL DEGRASSE TYSON: Did you ever notice that if you get to know two identical twins, they might look alike, but they're always subtly different? CANTANKEROUS NEIL DEGRASSE TYSON: Yep, whatever. CHEERFUL NEIL DEGRASSE TYSON: As they get older, those differences can get more pronounced.
Activation Energy and Enzymes
TITLE: Activation Energy and EnzymesSOURCE: Freeman, S, Biological Science, Second Edition, Pearson Prentice Hall, Inc.© 2006 Pearson Prentice Hall, Inc.KEYWORDS: Activation energy, enzymes, exergonic reactions, ATP, activation energy, catalysts, lock-and-key model, induced-fit model
The Ear Pages
Lists of Nobel Prizes and Laureates The Ear Pages Play the Ear Pages Game
Remote Antarctic island is 'richer in biodiversity than the Galapagos'
Antarctica's remote South Georgia Island boasts 90 percent of the world's fur seals, half of the world's elephant seals, is navigated by vast populations of blue whales, sperm whales and killer whales, and has beaches that can be packed shoulder-to-shoulder with nesting penguins. In total, it contains nearly 1,500 recorded species, many of which are found nowhere else on Earth. It's difficult to believe that until recently, this biological treasure was believed to be nothing more than an "inhospitable lump of rock." In fact, researchers now believe that South Georgia Island contains more species than anywhere else in the Southern Ocean, and may be the most biologically diverse remote island in the world — even more diverse than the storied Galapagos Islands, according to the Independent. "It shows you don't have to be a tropical island or in a hot part of the world to support a lot of marine life.
