The
Mega Foundation
Science News
August
31, 2004
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Milky Way's Age Narrowed Down - Space.com A new estimate of the age of our Milky Way Galaxy suggests it was an original member of the universe, having been born just about as early on as was possible. The overall universe is about 13.7 billion years old. That figure, after decades of wildly varying estimates, was pinned down last year to within 200 million years of accuracy. Scientists used space-based observations of a microwave background radiation that had been unleashed as a dense fog cleared, shortly after the universe's formation. |
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Stem Cells: Promise, in Search of Results - NY Times Left: In the beginning there are the stem cells: They stand ready to grow into what the body requires, and one day scientists may be able to design them to cure diseases or disability. Above, in a lab dish, cells derived from an embryo are developing into two different types of brain cells, neurons (red) and glia (green). One idea, the focus of about half the nation's stem cell research, involves studying stem cells that are naturally present in adults. Researchers have found such cells in a variety of tissues and organs and say they seem to be a part of the body's normal repair mechanism. There are no ethical issues in studying these cells, but the problem is in putting them to work to treat diseases. So far, no one has succeeded. The other line of research, with stem cells from embryos, has a different obstacle. Although, in theory, the cells could be coaxed into developing into any of the body's specialized cells, so far scientists are still working on ways to direct their growth in the laboratory and they have not yet effectively cured diseases, even in animals. |
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Nanotubes may have no 'temperature' - Nature Physicists have made a bizarre discovery: the concept of temperature is meaningless in some tiny objects. Although the concept of temperature is known to break down on the scale of individual atoms, research now suggests that it may also fail to apply in rather larger entities, such as carbon nanotubes. Ortwin Hess from the University of Surrey, Guildford, UK and colleagues say that if you took the temperature at one end of a 10-micrometre nanotube, it would not necessarily have the same temperature as the other end, no matter how long it was left to reach a thermal equilibrium. Such a nanotube is about as long as a sheet of paper is thick. "If you're down to a scale where temperature is not relevant, the fluctuations in physical properties of that system could be unpredictable, and that is potentially bad for any device," says Peter Atkins, a physical chemist at University of Oxford, UK. At this size limit, hot spots can sit next to cooler spots, without any energy flowing between the two. Moreover, the temperature of one compartment may fluctuate unpredictably over time. "It all boils down to the quantum uncertainty principle," says Hess. |
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Alzheimer's Disease: :
Biosciences:
8/31/2004:
8/31/2004: Stem
Cells: Promise, in Search of Results - NY
Times
8/31/2004: Forum: Discuss Stem Cell Research
- NY
Times
8/31/2004: Graphic: Science and Controversy
- NY
Times
8/31/2004: Britain Embraces Embryonic Stem Cell Research
- NY
Times
8/31/2004: Despite Darkness, Nocturnal Bees Learn Visual Landmarks While Foraging At Night - Science
Daily
8/31/2004: Shedding New Light On Biology - Science
Daily
8/31/2004: Keeping It In The Family - Science
Daily
8/31/2004: Dingo’s Mother A Chinese Domesticated Dog - Science
Daily
8/31/2004: Each White Whale Has Its Individual Voice - Science
Daily
8/31/2004: Using Statistics To Decipher Secrets Of Natural Mutation - Science
Daily
8/31/2004: Gene Duplication Allowed Pigs To Have More Babies - Science
Daily
8/31/2004: Unmasking The 'Foreman' Of The Golgi Apparatus - Science
Daily
8/31/2004: Scientists Visualise Cellular Handmaiden That Restores Shape To Proteins - SpaceDaily
Climate, Environment:
8/31/2004: Ice Age Floodwaters Leave a Walkable Trail Across the Northwest
- NY
Times
8/31/2004: Map: The Proposed Trail
- NY
Times
8/31/2004: U.N. Urges Funds to Curb African Locusts
- NY
Times
8/31/2004: Alien Catfish Species Found in N.J. Canal
- NY
Times
8/31/2004: Research Examines Bio-pesticides Battle With Both Pests And Regulators - Science
Daily
8/31/2004: Technology Already Exists To Stabilize Global Warming - Science
Daily
8/31/2004: Future Heat
Waves: More Severe, More Frequent And Longer Lasting - Science
Daily
8/31/2004: Greenland Ice Core Project Yields Probable Ancient Plant Remains - Science
Daily
8/31/2004: TRMM Sees Rain From Hurricanes Fall Around The World - Science
Daily
8/31/2004: Anti-Bacterial Additive Found In Maryland Streams - SpaceDaily
8/31/2004: Canary Islands Landslides And
Mega-Tsunamis: Should We Really Be Frightened- - SpaceDaily
8/31/2004: Scientists Study Desert Air To Understand Weather And Climate - SpaceDaily
Computers:
Devices
Communications
Technology
PC's
Internet
Miscellaneous
Energy:
8/31/2004: New Research Will Help Revolution In Diesel Motoring - Science
Daily
Health:
Cardiovascular
8/31/2004: Listening In On The Whispering Heart - Science
Daily
8/31/2004: Cardiovascular Patients Taking Certain Medications Need Close Monitoring To Guard Against Dangerously High Potassium Levels - Science
Daily
8/31/2004: More Than 200 New Genes In Acute Myocardial Infarction Discovered - Science
Daily
8/31/2004: Snake Venom Reveals Clues About Heart Drug - Science
Daily
Cancer
8/31/2004: Jefferson Scientists Find Gene Expression Pattern May Predict Behavior Of Leukemia - Science
Daily
8/31/2004: Marijuana Ingredient Inhibits VEGF Pathway Required For Brain Tumor Blood Vessels - Science
Daily
Infectious
8/31/2004: Protective Gene May Enhance Vaccine Responses - Science
Daily
8/31/2004: X Marks The
Spot: Vector Insertion Is Viral Specific - Science
Daily
8/31/2004: Researchers Identify Breakthrough In Hepatitis C Virus Infection - Science
Daily
8/31/2004: Scientists Discover New Approaches To Manipulating AIDS Virus - Science
Daily
8/31/2004: AIDS And Tomatoes - Science
Daily
Non-Infectious
8/31/2004: Nicotine Patch Helps Teens Cut Cigarette Use, Stanford And Packard Researchers Learn - Science
Daily
8/31/2004: Stem Cell Research Targets Cerebral Palsy - Science
Daily
8/31/2004: Newly Discovered Protein May Be Key To Muscular Dystrophy - SpaceDaily
Miscellaneous
8/31/2004: King Crab Heals Scalds And Sores - Science
Daily
8/31/2004: Possible New Cure For Psoriasis - Science
Daily
8/31/2004: Nucleic Acid-Amplification Testing Further Safeguards Nation's Blood Supply, NHLBI Study Shows - SpaceDaily
History, Anthropology:
Miscellaneous:
8/31/2004: Japan Plans to Launch Spy Satellites
- NY
Times
8/31/2004: Voice-guided Mobile Phones To Complement Guide Dogs - SpaceDaily
Neurosciences:
8/31/2004: 'Biggest Ever' Study Of Its Kind May Advance The Treatment, Diagnosis And Prevention Of Schizophrenia - Science
Daily
8/31/2004: Women’s Expectation Of Life Span Influences Their Babies’ Gender - Science
Daily
8/31/2004: Antidepressants Plus 'Talk Therapy' Are Effective Therapy For Teen Depression - Science
Daily
Physics and Astronomy:
8/31/2004: Can a Robot Save
Hubble? More Scientists Think So - NY
Times
8/31/2004: An Inside-Out Star
- NY
Times
8/31/2004: Colder, slower, better - PhysicsWeb
8/31/2004: New moons galore for the solar system - PhysicsWeb
8/31/2004: German lab wins linear collider contest - PhysicsWeb
8/31/2004: New look for NMR - PhysicsWeb
8/31/2004: Taking a chance on physics - PhysicsWeb
8/31/2004: Hubble Peers Inside A Celestial Geode - Science
Daily
8/31/2004: Cluster Finds Giant Gas Vortices At The Edge Of Earth’s Magnetic Bubble - Science
Daily
8/31/2004: Scientists Discover Ganymede Has A Lumpy Interior - Science
Daily
8/31/2004: Out From The
Shadows: Two New Saturnian Moons - Science
Daily
8/31/2004: How Special Is The Solar
System? - Science
Daily
8/31/2004: Chandra Catches Early Phase Of Cosmic Assembly - Science
Daily
Prolongevity
8/31/2004: Longevity Protein May Slow Many Neurodegenerative Disorders - Science
Daily
8/31/2004: The 'Adonis
Effect': Mayo Researchers Discover Genetic Basis In Mice For Aging With Strong Bones, Low Body Fat - Science
Daily
Robotics:
Space:
8/31/2004: NASA Extends Mars Odyssey Orbiter Mission
- NY
Times
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Technology:
8/31/2004: Nanotubes
may have no 'temperature' - Nature
8/31/2004: Cryptography system goes underground - PhysicsWeb
8/31/2004: Scientists Help Police Bust Forgers - Science
Daily
8/31/2004: High-tech Lorry Leaves Bio-waste Bins Sparkling - Science
Daily
8/31/2004: Scientists Formulate Intelligent Glass That Blocks Heat Not Light - Science
Daily
8/31/2004: Carbon Nanotubes Eliminate Manufacturing Woe - Science
Daily
8/31/2004: Zap,
Bam: Light-activated Glue Holds And Releases Workpieces In A Flash - Science
Daily