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Science News Archive June 2010 - Page 3


Page 3 of 24

Ovarian transplantation restores fertility to old mice and also lengthens their lives

Scientists have discovered that ovarian transplants from young mice can restore fertility and increase lifespan in aging female mice. The procedure, which has been performed with limited success in women so far, may also have a rejuvenating effect on their behavior. Researchers believe that similar procedures could be used to preserve ...

Smoking-related colorectal cancer in older women is associated with molecularly defined DNA changes

A study found that smoking is associated with molecularly defined DNA changes and a subtype of colorectal cancer that emerges more frequently among older women. The researchers suggest that epigenetic modifications may play a role in the development of smoking-related colorectal carcinogenesis.

SourceJournal of the National Cancer Institute·JournalJNCI Journal of the National Cancer Institute·DateJun 29, 2010

Putting muscle into birdsong

The study found that male zebra finches use their stronger vocal muscles to control the pitch of their songs, while females rely on lung pressure. This discovery sheds light on how birds learn to sing and the complex mechanisms behind birdsong.

SourceUniversity of Utah·JournalPLOS ONE·DateJun 29, 2010

Cheap, simple, noninvasive blood test may replace invasive diagnostic techniques in early pregnancy

Researchers have developed a simple, non-invasive blood test that can detect chromosomal abnormalities in the developing fetus using molecular genetic probes. The test has already shown promise in identifying DNA from the Y chromosome and is being investigated for detecting trisomy 21 (Down's syndrome) and other conditions.

'Galactic archaeologists' find origin of Milky Way's ancient stars

Researchers at Durham University use huge computer simulations to recreate the beginnings of the Milky Way, finding that many ancient stars originated from smaller galaxies torn apart by galaxy collisions. The simulations provide a blueprint for galaxy formation and reveal clues to the early history of the Milky Way.

SourceDurham University·JournalMonthly Notices of the Royal Astronomical Society·DateJun 29, 2010

Key mechanism in the brain's computation of sound location identified

Researchers at NYU identified a key mechanism in the brain's computation of sound location, finding that neurons are sensitive to rise times and detect differences between input shapes on a microsecond scale. This contradicts previous theories, which held that biophysical properties were identical for both ears.

SourcePLOS·JournalPLOS Biology·DateJun 29, 2010

WIC might prevent mothers from feeding cow's milk too early

Women who enrolled in WIC during their first or second trimester were less likely to introduce cow's milk too soon than those who enrolled later. This study highlights the importance of timely nutrition reinforcement for low-income mothers and their children's health.

SourcePenn State·JournalJournal of the American Dietetic Association·DateJun 29, 2010

Novel approaches to R&D in Africa needed

The African Network for Drugs and Diagnostics Innovation aims to stimulate health product research and development in Africa. Successful implementation requires sustainable capacity, infrastructure, funding, leadership, and understanding of health R&D in the African continent.

SourcePLOS·JournalPLOS Medicine·DateJun 29, 2010

Intensive therapy improves some outcomes for patients with established type 2 diabetes but also increases risk of death, weight gain, and hypoglycemia (from ACCORD study)

The ACCORD study found that intensive glucose treatment delayed albuminuria onset but didn't reduce microvascular complications like eye disease or kidney failure. However, it increased mortality, weight gain, and severe hypoglycemia risk, prompting a shift to standard therapy.

SourceThe Lancet_DELETED·JournalThe Lancet·DateJun 29, 2010

Fish with chips

Researchers used Robofish to study the collective behavior of three-spined sticklebacks in groups. The findings show that individual fish are more influenced by neighboring fish than distance from the leader, providing insights into fish group dynamics and collective animal behavior.

SourceSpringer·JournalBehavioral Ecology and Sociobiology·DateJun 29, 2010

Study challenges long-held assumption about competition in disturbed ecosystems

A laboratory study of microscopic organisms subjected to varying degrees of acoustic disturbance shows that competition can be a factor in regulating ecological communities regardless of the intensity or frequency of disturbance. The findings contradict the intermediate disturbance hypothesis, suggesting that there is a strong trade-of...

SourceGeorgia Institute of Technology·JournalProceedings of the National Academy of Sciences·DateJun 28, 2010

Is this the perfect prawn?

CSIRO scientists have developed an improved Black Tiger prawn breed using DNA technology, resulting in record yields of up to 24.2 tonnes per hectare. This breakthrough has the potential to revolutionize the Australian prawn farming industry and increase production from 5,000 tonnes to 12,500 tonnes by 2020.

Memory problems not the only predictor of later mild cognitive impairment

A study published in the Journal of the International Neuropsychological Society found that lower performance on tests measuring learning and processing speed, as well as symptoms of depression, predicted subsequent cognitive decline in a normal population. The researchers used advanced statistical methodology to analyze multiple varia...

SourceRush University Medical Center·JournalJournal of the International Neuropsychological Society·DateJun 28, 2010

Harvard's Wyss Institute develops technology to produce sugar from photosynthetic bacteria

Researchers at Harvard's Wyss Institute have engineered photosynthetic bacteria to produce simple sugars and lactic acid, offering a sustainable alternative for producing commodity chemicals. This innovation could lead to reduced carbon dioxide emissions and greater availability of biodegradable plastics.

SourceWyss Institute for Biologically Inspired Engineering at Harvard·JournalApplied and Environmental Microbiology·DateJun 28, 2010

Reading the look of love

Researchers discovered that volunteers could rapidly assess whether a face was looking at them if it had exaggerated masculine or feminine features. Women were quicker to classify gaze direction when viewing more masculine faces, while men were faster with feminine faces.

SourceAssociation for Psychological Science·JournalPsychological Science·DateJun 28, 2010

Lower back pain and surgery

A literature review suggests that surgery is not the first line of treatment for low back pain caused by herniated disks, and that alternative options such as physical therapy and medications can provide relief. The review also found that patients with larger herniations are more likely to experience a recurrence of pain after surgery.

SourceAmerican Academy of Orthopaedic Surgeons·JournalJournal of the American Academy of Orthopaedic Surgeons·DateJun 28, 2010

Virus 'explorers' probe inner workings of the brain

Princeton University researchers are developing a new method for studying brain connectivity using genetically engineered viruses. The viruses, designed by Lynn Enquist's team, travel through the nervous system, tracing connections between neurons and reporting on their activity. This approach has significant implications for understan...

York U study finds better way to battle mosquitoes

A York University study found that leaving organic debris in catch basins improves the effectiveness of S-methoprene in controlling mosquito larvae. The researchers discovered that S-methoprene binds to organic material, making it more effective when left in the catch basins.

SourceYork University·JournalJournal of the American Mosquito Control Association·DateJun 28, 2010

Dark chocolate lowers blood pressure

Researchers found that consuming dark chocolate can significantly reduce systolic blood pressure by 5mmHg, comparable to 30 minutes of moderate exercise. This effect is most pronounced in individuals with high blood pressure, potentially reducing the risk of cardiovascular events by 20% over five years.

SourceBMC (BioMed Central)·JournalBMC Medicine·DateJun 28, 2010

Memories are made of this

A new study led by the University of Leicester has revealed the mechanism by which memories are formed, highlighting the importance of the M3-muscarinic receptor in this process. The research, funded by the Wellcome Trust, holds potential to impact drug design for treating Alzheimer's disease.

SourceUniversity of Leicester·JournalProceedings of the National Academy of Sciences·DateJun 28, 2010

Can one-time tillage improve no-till?

A five-year study found that one-time tillage did not negatively impact grain yield or soil structure in no-till crops. However, it may help manage perennial weeds and reduce phosphorus stratification. The researchers concluded that tilling should only be done to address specific problems, as it increases erosion risk.

SourceAmerican Society of Agronomy·JournalAgronomy Journal·DateJun 28, 2010

Making 'virtopsies' a reality

A new research project at the University of Leicester aims to develop a reliable and cost-effective system for diagnosing coronary heart disease using CT scans. The technology will enable visualisation of coronary arteries in cadavers, making diagnoses comparable to current autopsy practice.