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Science News Archive 2006 - Page 80


Page 80 of 178

Atomic-resolution structure of a ribozyme yields insights into RNA catalysis and the origins of life

Researchers at UCSC's RNA Center have obtained a near-atomic resolution image of the three-dimensional shape of a ribozyme, revealing how functional groups of RNA mediate acid-base chemical catalysis. This breakthrough sheds new light on the 'RNA World' hypothesis and has implications for understanding the origins of life.

Making hair realistic in computer animation

A new method for rendering realistic hair in computer animation has been developed by Cornell researchers, allowing for more accurate simulations of light scattering and diffusion. This breakthrough reduces computation time by 87.5%, enabling the creation of more realistic blond and light-colored hairstyles.

Early fetal gender test demands rapid ethical policymaking

The new non-invasive test allows for fetal sex determination at 5-7 weeks of gestation, sparking debates about the technology's implications. Experts warn that rapid policymaking is needed to address ethical concerns surrounding its use, particularly in cases where abortion is considered.

SourceWiley·JournalPrenatal Diagnosis·DateJul 20, 2006

Bubbles go high-tech to fight tumors

University of Michigan researchers use gas bubbles to block blood flow to tumors, offering a promising new technique in embolotherapy. The method allows for precise control over bubble formation, minimizing damage to surrounding tissue.

SourceUniversity of Michigan·JournalJournal of Biomechanical Engineering·DateJul 20, 2006

Women show 47 percent greater persistence with osteoporosis drugs if offered monthly tablet, support

A study by family doctors found that women taking a monthly tablet of ibandronate and receiving telephone support showed a 47% greater persistence with their medication than those on weekly alendronate. This improved compliance is crucial in treating osteoporosis, which affects one in three women over 50 worldwide.

SourceBlackwell Publishing Ltd.·JournalInternational Journal of Clinical Practice·DateJul 20, 2006

JCI table of contents: July 20, 2006

Research reveals that nicotine stimulates cell proliferation in lung cancer cells by activating the Rb–Raf-1 pathway, which is dependent on functional nicotinic acetylcholine receptors. Additionally, targeting tumor-associated macrophages holds promise as a novel strategy against breast and other cancers.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateJul 20, 2006

Seeing the serpent

Scientists suggest that primates evolved good close-up eyesight to avoid snakes, which were the primary predators of modern mammals. Fossil records show that snakes emerged around 100 million years ago, prompting primates to adapt their vision.

SourceUniversity of California - Davis·JournalJournal of Human Evolution·DateJul 20, 2006

Much needed new antibiotic in fight against 'superbugs'

The launch of Tygacil (tigecycline) in the UK marks a significant step forward in the fight against antibiotic-resistant bacteria, including MRSA and Escherichia Coli. The new antibiotic has been developed to overcome common mechanisms of resistance and offers a single effective therapy for complicated skin and soft tissue infections.

Kidney donors pay the price

A study by the University of Alberta and other institutions found that living kidney donors incur various costs, including travel and accommodation expenses, lost income, and physical limitations after surgery. These costs can range from $837 to $28,900 per donor and may lead to financial burdens and disincentives for potential donors.

SourceUniversity of Alberta·JournalNephrology Dialysis Transplantation·DateJul 20, 2006

Rice scientists unveil 'nanoegg'

Researchers at Rice University's Laboratory for Nanophotonics have created nanoeggs, asymmetric particles that focus light on small regions of space. These nanoeggs can be tuned to interact with more wavelengths of light than their nanoshell cousins, making them suitable for applications in molecular imaging and medical diagnostics.

SourceRice University·JournalProceedings of the National Academy of Sciences·DateJul 20, 2006

Nuclear explosion on a dead star

Astronomers have observed a massive nuclear explosion on the surface of a white dwarf star, sending gas into space and creating a blast wave that accelerates electrons to nearly the speed of light. The European VLBI Network tracked the outburst using telescopes around the world, revealing a cigar-like shape in the blast wave.

SourceMax-Planck-Gesellschaft·JournalNature·DateJul 20, 2006

New clues to how major weight-loss drugs work

Researchers have identified key components in the molecular mechanism of serotonin's action on appetite regulation. Serotonin and drugs that affect its action act on neurons to reduce AgRP release and increase αMSH levels, disrupting function of melanocortin receptors.

SourceCell Press·JournalNeuron·DateJul 19, 2006

How purple corn and RNA break genetic laws

Scientists have discovered that an enzyme called RNA-dependent RNA polymerase is needed for paramutation, a phenomenon where one version of a gene can order another to act differently. This finding has significant implications for breeding better crop plants and unraveling complex genetic diseases, including some human health conditions.

SourceUniversity of Arizona·JournalNature·DateJul 19, 2006

Antioxidants may slow vision loss

Scientists at Johns Hopkins have successfully blocked the advance of retinal degeneration in mice with antioxidants, including vitamin E and alpha-lipoic acid. The study found that high oxygen levels in the retina kill cone photoreceptors, which are critical to central vision.

SourceJohns Hopkins Medicine·JournalProceedings of the National Academy of Sciences·DateJul 19, 2006

Corn waste potentially more than ethanol

A Penn State researcher has developed a process that converts organic matter in corn waste into electricity, with a conversion rate of over 93 percent. This technology could provide a new, sustainable source of energy, reducing reliance on ethanol and other fossil fuels.

SourcePenn State·JournalEnergy & Fuels·DateJul 19, 2006

UQ helps Vietnam with health records

A five-year project funded by The Atlantic Philanthropies aims to improve Vietnam's health system by gathering detailed birth and death data. UQ health experts will work with Vietnamese researchers and government personnel to develop policy, advanced mortality, and cost-effectiveness analyses.

Toward an extremely large European telescope

The ESO ELT Project Office will work closely with experts from the scientific community and industry to design a telescope that will improve performance by over tenfold compared to current telescopes. A baseline design is expected to be presented to the ESO Council in late 2006.

SourceESO·DateJul 19, 2006