Chemists Track How Drug Changes, Blocks Flu Virus
Chemists Track How Drug Changes, Blocks Flu Virus
Chemists have discovered an antivirus drug attacks influenza A by changing the motion and structure of a proton channel necessary for the virus to infect healthy cells. Researchers said the findings are particularly important because mutations of the type A virus are resistant to the antivirus drug.
New Hybrid Vehicle Given Its First Test Drive In The Ocean
Taking a page out of a science fiction story, researchers have successfully flown the first environmentally powered robotic vehicle through the ocean. The new robotic "glider" harvests heat energy from the ocean to propel itself across thousands of kilometers of water. Unlike motorized, propeller-driven vehicles, gliders propel themselves through the ocean by changing their buoyancy to dive and surface. Wings generate lift, while a vertical tail fin and rudder allow the vehicles to be steered horizontally. Gliding underwater vehicles trace a saw-tooth profile through the ocean's layers, surfacing periodically to fix their positions via the Global Positioning System and to communicate via Iridium satellite to a shore lab.
Oldest Horseshoe Crab Fossil Found, 100 Million Years Old
Few modern animals are as deserving of the title "living fossil" as the lowly horseshoe crab. Seemingly unchanged since before the Age of Dinosaurs, these venerable sea creatures can now claim a history that reaches back almost half-a billion years. Scientists have revealed rare new horseshoe crab fossils from 445 million year-old Ordovician age rocks in central and northern Manitoba, which are about 100 million years older than any previously known forms.
Cells Identified That Cause Nervous System Disease
Scientists have tracked down the cells responsible for neurofibromatosis type 1, a disfiguring, incurable condition and one of the most common hereditary disorders. Neurofibromatosis type 1, or NF1, is a peripheral nervous system condition that afflicts one in 3,500 Americans. Symptoms normally begin to appear by age 10. Though most cases are mild, the disease can lead to disfigurement, learning disabilities, blindness, skeletal abnormalities, loss of limbs and, occasionally, lethal malignancies.
First Documented Case Of Pest Resistance To Biotech Cotton
A pest insect known as bollworm, or Helicoverpa zea, is the first to evolve resistance in the field to plants modified to produce an insecticide called Bt, according to a new research report. Entomologists discovered the existence of Bt-resistant populations of bollworm in Mississippi and Arkansas by analyzing published data from monitoring studies of six major caterpillar pests of Bt crops in Australia, China, Spain and the US.
Engineers Create Record-setting High-frequency Circuit That Could Slash Costs For Detectors
Engineers have crafted the world's highest-frequency circuit made with a common type of semiconductor transistor, a step that could slash the price of detectors useful in earlier cancer detection and quicker pollution spotting. Ultra-high-frequency circuits have been created in the past, but only with exotic materials that are costly to manufacture. CMOS, by contrast, is the standard process used to make the majority of the circuits in the integrated circuit industry. That opens the door to widespread manufacture and distribution of the high-frequency circuits. At a recent conference, the scientists demonstrated a 410-gigahertz circuit using complementary metal oxide silicon, or CMOS, technology -- the technology used to make many of the components in personal computers, cell phones and handheld electronic devices.
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