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Science News Archive September 2008 - Page 19


Page 19 of 24

How are herbicides discovered?

The traditional method of discovering herbicides involves random searching of chemicals, resulting in most commercial products. New biotech information allows companies to create targeted weed killers. The American Society of Agronomy developed an interactive web lesson to teach students about the history and development of herbicides.

SourceAmerican Society of Agronomy·JournalJournal of Natural Resources and Life Sciences Education·DateSep 8, 2008

Safety of anti-malarial drugs in pregnancy must be monitored

A new study highlights the need to develop systems to assess antimalarial drug safety in early pregnancy, as artemisinins have been shown to be toxic to embryos in animal models. An international antimalarial pregnancy exposure registry is proposed to enable targeted pharmacovigilance and timely assessment of risk-benefit profiles.

SourcePLOS·JournalPLOS Medicine·DateSep 8, 2008

How plants fine tune their natural chemical defenses

Researchers at the Salk Institute discovered that only a few mutations in an enzyme can shift the output of plant compounds, allowing them to adapt to changing environments. This finding has implications for developing environmentally friendly fungicides and pesticides, as well as new flavors and fragrances.

SourceSalk Institute·JournalNature Chemical Biology·DateSep 7, 2008

A new 'Pyrex' nanoparticle

Researchers have developed a new method to fabricate borosilicate glass nanoparticles with increased stability, overcoming limitations of current nanoparticle materials. These nanoparticles could enable applications in diagnostic tests, targeted drug therapy, photonic devices, ultrasonic microscopy, and chemical filtration membranes.

SourceEcole Polytechnique Fédérale de Lausanne·JournalNature Nanotechnology·DateSep 7, 2008

How STDs increase the risk of becoming infected with HIV

Research suggests that sexually transmitted diseases (STDs) can increase the risk of contracting HIV by activating Langerhans cells in the skin and vagina. This activation allows the virus to spread more easily, highlighting the potential for anti-inflammatory treatments to prevent HIV transmission.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateSep 5, 2008

What is a gene?

A study analyzing 300 newspaper articles reveals five main 'gene frames' used by media, from deterministic to evolutionary and playful metaphors. The findings aim to provide a tool for scientists and journalists to better communicate genetics to the public.

SourceEMBO·JournalEMBO Reports·DateSep 5, 2008

Molecular evolution is echoed in bat ears

Research by Queen Mary University of London scientists found that some bat species' echolocation genes are similar to those of fruit bats, indicating possible independent evolution of the trait. This suggests that echolocation may not be a single evolutionary event but rather an example of convergent evolution.

SourceQueen Mary University of London·JournalProceedings of the National Academy of Sciences·DateSep 5, 2008

Older Vietnamese report more mental health problems

A recent study by UC Irvine reveals that older Vietnamese Americans are more likely to experience mental health issues, including depression and PTSD, stemming from their experiences as political refugees. The findings highlight the need for improved community mental health services to address these long-standing problems.

SourceUniversity of California - Irvine·JournalJournal of the American Geriatrics Society·DateSep 4, 2008

Molecular evolution is echoed in bat ears

Researchers studied the Prestin gene in echolocating bats and fruit bats, finding similarities in distantly related species. This suggests that echolocation has evolved more than once in bats, defying conventional wisdom on evolutionary relationships.

SourceUniversity of Bristol·JournalProceedings of the National Academy of Sciences·DateSep 4, 2008