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Science News for July 20, 2006


Rutgers-Newark researcher discovers new motor protein mechanism linked to heart disease and strokes

Researchers have identified a possible mechanism used by an important motor protein that enables bacteria to travel through the bloodstream and infect organs such as the heart. The discovery may lead to the development of new pharmacological therapies that can target and kill bacteria, preventing or minimizing damage to the heart muscle.

SourceRutgers University·JournalNature Structural & Molecular Biology·DateJul 20, 2006

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