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POPSTransplanted Organs "Remember" Their Donor Where do memories reside? This is so weird! It's actually pretty creepy, I reckon. A 29-year-old lesbian and a fast food junkie received a heart from a 19-year-old woman vegetarian who was "man crazy." The recipient reported after her operation that meat made her sick and she was no longer attracted to women. If fact, she became engaged to marry a man. The whole article is well worth the read.
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POPSA New Kind of Science - Stephen Wolfram (Lecture) worth watching, on cellular automata, complexity, randomness, nature, mathematics, science, biology, natural selection, networks, space-time, physics, causality, relativity, determinism, quantum mechanics, computational irreducibility, ... (not necessarily in that order) His book is freely available online: http://www.wolframscience.com/nksonline/toc.html (see also The Nature of Code )
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POPSAchilles Heel Of HIV Found?
“Unlike the changeable regions of its envelope, HIV needs at least one region that must remain constant to attach to cells. If this region changes, HIV cannot infect cells. Equally important, HIV does not want this constant region to provoke the body’s defense system. So, HIV uses the same constant cellular attachment site to silence B lymphocytes - the antibody producing cells. The result is that the body is fooled into making abundant antibodies to the changeable regions of HIV but not to its cellular attachment site. Immunologists call such regions superantigens. HIV’s cleverness is unmatched. No other virus uses this trick to evade the body’s defenses.” Paul’s group has engineered antibodies with enzymatic activity, also known as abzymes, which can attack the Achilles heel of the virus in a precise way. “The abzymes recognize essentially all of the diverse HIV forms found across the world. This solves the problem of HIV changeability. The next step is to confirm our theory in huma
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POPSViruses can catch colds, says study that redefines life itself Prof La Scola and his colleagues were surprised to spot a smaller type of virus attached to the virus-making factory inside infected cells. The new virus - Sputnik - was unable to infect cells by itself but seemed to hijack the larger to achieve its infectious aims. By regulating the growth and death of plankton, giant viruses - and satellite viruses such as Sputnik - could be a major influence on ocean nutrient cycles and climate. "These viruses could be major players in global systems," Nature is told by Prof Curtis Suttle, an expert in marine viruses at the University of British Columbia in Vancouver.
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POPSPotential Alzheimer's, Parkinson's Cure Found In Century-old Drug Also impressed is one of Dr. Atamna's co-authors, Bruce Ames, PhD, a senior scientist at Children's and world-renowned expert in nutrition and aging. "What we potentially have is a wonder drug." said Dr. Ames. "To find that such a common and inexpensive drug can be used to increase and prolong the quality of life by treating such serious diseases is truly exciting." Dr. Atamna's research is the first to show that low concentrations of the drug have the ability to slow cellular aging in cultured cells in the laboratory and in live mice. He believes methylene blue has the potential to become another commonplace low-cost treatment like aspirin, prescribed as a blood thinner for people with heart disorders.
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POPSA New State Of Mind But that view of the neurotransmitter was vastly oversimplified. What wasn’t yet clear was that dopamine is also a profoundly important source of information. It doesn’t merely let us take pleasure in the world; it allows us to understand the world.
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POPSScience Behind Mysterious 'Fifth Taste' Revealed In the late 19th century, French chef and veal-stock inventor Auguste Escoffier suggested that a fifth taste was responsible for his mouth-watering brew. Though Escoffier's dishes were popular, his theories were dismissed until 1908, when Japanese chemist Kikunae Ikeda showed that an amino acid called glutamate underlies the taste of a hearty variety of seaweed soup. In honor of Ikeda, the taste was dubbed umami, the Japanese word for delicious. It took another 80 years for umami to be recognized by science as comparable to the other four tastes. In the meantime, monosodium glutamate became wildly popular as a flavor enhancer. But MSG can cause headaches and dizziness, and has been tenuously linked to long-term neurological disorders. Between the public dissatisfaction with MSG and growing demand for artificial meats and dairy products, an umami alternative is welcome.
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POPSAmoebas turn to family during tough times It is absolutely fascinating how certain patterns which we tend to associate with very high levels of complexity and organization, are present in very simple organisms and serve in fact the primordial imperative of survival.
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POPSOnline Papers in Philosophy This is fantastic. What is the point of this site? Many philosophers provide drafts of new papers on their websites; Online Papers in Philosophy keeps track of all the sites I’m aware of, and alerts readers to newly posted papers. Here are the sites I am currently tracking. (Actually, that list might not be completely up-to-date; as new pages are submitted, I add them to the list that my software uses; I periodically update the online list to match.) Checking in regularly with OPP will keep you aware of at least most of the new papers being posted on the web. Check out which sites are being tracked here: http://philosophy.jollyutter.net/opp/?page_id=6 I just clipped a few papers, click source ... really ...
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POPSNew Longevity Drugs Poised to Tackle Diseases of Aging A growing number of scientists suspect that the breakdown of mitochondria is among the most important causes of cell-level changes that eventually cause the body's tissues to degenerate with age. The damage accumulates gradually until hitting some critical mass of malfunction, at which point diseases arrive rapidly. That may be why so many diseases first occur during middle age, and become steadily more common afterwards.
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POPSSynthetic biology yields clues to evolution and the origin of life The first forms of life did not evolve in the usual sense, he said, but simply grew. "Evolution began when large populations of cells had variations that led to different metabolic efficiencies," Deamer said. "If the populations were in a confined environment, at some point they would begin to compete for limited resources."
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POPSWireless at Fiber Speeds Richard Ridgway, a senior researcher at Battelle, says that the technique could be used to send huge files across college campuses, to quickly set up emergency networks in a disaster, and even to stream uncompressed high-definition video from a computer or set-top box to a display.
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POPS"There is no question more important to us than our mortality" "A second possibility is more daring and probably much harder to become a reality. Combine human cloning with a mechanism to store all our memories in a giant database. Inject the clone of a certain age with the corresponding memories. Voil€! Will this clone be you? No one really knows. Certainly, just the clone without the memories won’t do. We are what we remember. To keep on living with the same identity, we must keep on remembering (unless you don’t like yourself). So, assuming such tremendous technological jump is even feasible, we could migrate to a new copy of ourselves.”
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POPSVideo of the First 24 Hours of an Embryo's Cells The new technique, called Digital Scanned Laser Light-Sheet Fluorescence Microscopy, could be used on other animals such as mice, chicken and frogs, which would could help researchers better understand evolution at the cellular scale. Already, the research has shown that the initial stages of heart development do not happen as scientists thought.
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POPSNew theory of aging points the finger at misrepairs But sometimes these repair mechanisms go wrong, leaving small regions of misrepair. The new idea is that aging is the result of the accumulation of these misrepairs over time. This leads to a key prediction about aging. The team says: "Our theory suggests that for extending lifespan all efforts need to focus on the reduction of misrepair." So what should you do if you want to live longer? Avoid damage as far as possible, say Michelitsch and pals, emphasising that "it is especially important to prevent chronic inflammation, which is an important source of misrepair."
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