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Search results for “Environment”

1,000+ results for "Environment"

'Instant acid' method offers new insight into nanoparticle dispersal in the environment and the body

NIST researchers use a chemical trick to change the acidity of a solution instantly, allowing them to study how nanoparticles behave when exposed to sudden changes in pH. This technique has implications for designing nanoparticles for medical applications, where pH can vary significantly within cells.

SourceNational Institute of Standards and Technology (NIST)·JournalThe Journal of Chemical Physics·DateJun 9, 2010

Early human habitat was savanna, not forest

A team of researchers, led by Naomi Levin of Johns Hopkins University, reexamined data from a 2009 study on the early human ancestor Ardi and found that its environment was likely a savanna, not a forest. This conclusion contradicts the 'savanna hypothesis', which proposes that the expansion of grasslands prompted humans to walk upright.

SourceJohns Hopkins University·JournalScience·DateMay 27, 2010

Lunar polar craters may be electrified

Researchers found that solar wind flowing over lunar polar craters creates a complex electrical environment, affecting surface chemistry and dust cling. The team's calculations reveal that the inside walls and floor acquire a negative electric charge due to electron-ion separation, posing challenges for future exploration.

Tackling transport and environment in Africa

The Transport and Environment – Science Technology (TEST) Network aims to strengthen scientific and technological support for sustainable transport policies in Sub-Saharan Africa. The three-year project will enhance research capacity, share knowledge, and improve road safety, air pollution, and traffic congestion.

Why mice develop 'knots' while exploring a new environment

Researchers found that mice create 'knots' – preferred places with high path tortuosity – during exploration, which enhance their visual scene interpretation, memory of the place, and provide multiple views. This study contributes to understanding how animals map environments and accomplish goals.

SourcePLOS·JournalPLOS Computational Biology·DateJan 14, 2010

Of girls and geeks: Environment may be why women don't like computer science

Research suggests that environment plays a significant role in women's interest in computer science, with stereotypical settings evoking a masculine image. Women tend to prefer non-stereotypical environments, such as those without Star Trek posters or junk food, and feel less of a sense of belonging in stereotypical settings.

SourceUniversity of Washington·JournalJournal of Personality and Social Psychology·DateDec 14, 2009

Crushing cigarettes in a virtual reality environment reduces tobacco addiction

A study published in CyberPsychology and Behavior found that smokers who crushed virtual cigarettes in a virtual reality environment had significantly reduced nicotine dependence and higher rates of tobacco abstinence compared to those who grasped virtual balls. The treatment group stayed in the program longer, with higher rates of smo...

SourceMary Ann Liebert, Inc./Genetic Engineering News·JournalCyberPsychology & Behavior·DateOct 27, 2009

Social isolation worsens cancer

Researchers found that social isolation caused increased tumor growth and altered gene expression in mouse mammary glands, suggesting potential molecular biomarkers and targets for preventive intervention in human breast cancer. The study also supports previous epidemiologic studies linking social isolation to chronic disease mortality.

SourceUniversity of Chicago Medical Center·JournalCancer Prevention Research·DateSep 29, 2009

When nano may not be nano

A new study by an international team of researchers argues that the current definition of nanoparticles is not specific enough to determine their potential impact on human health and the environment. The study suggests that only particles smaller than 30 nanometers should be scrutinized for their unique properties.

SourceDuke University·JournalNature Nanotechnology·DateSep 13, 2009

A breath of fresh air could improve drug toxicity screening

A team of researchers at Massachusetts General Hospital has developed a new way to culture liver cells for drug toxicity screening, using a high-oxygen environment and serum-free medium. This method significantly improves the function of cultured liver cells, enabling them to predict the clearance rates of drugs with high accuracy.

SourceMassachusetts General Hospital·JournalProceedings of the National Academy of Sciences·DateSep 2, 2009

Weight-loss surgery can break a family's cycle of obesity

A new study published in The Endocrine Society's Journal of Clinical Endocrinology & Metabolism found that adolescent and young children of obese mothers who underwent weight-loss surgery prior to pregnancy have a lower prevalence of obesity and improved cardio-metabolic markers. The research suggests that the intrauterine environment ...

SourceThe Endocrine Society·JournalThe Journal of Clinical Endocrinology & Metabolism·DateSep 1, 2009

Finding the constant in bacterial communication

Researchers found that a key factor in quorum sensing is the ratio of bacteria to environment volume, regulating biological functions like bioluminescence and nutrient foraging. This discovery provides insights into fundamental design of quorum sensing systems and enables engineering of synthetic gene circuits.

SourceDuke University·JournalMolecular Systems Biology·DateJul 7, 2009

Novel approach estimates nanoparticles in environment

A novel approach estimates that titanium dioxide nanoparticles are produced in increasing amounts, posing potential environmental and health risks. The study's findings suggest that up to 2.5 million metric tons of nanomaterial could be released into the environment by 2025.

SourceDuke University·JournalJournal of Environmental Science and Technology·DateMay 20, 2009

Study sheds new light on link between obesity and infertility

A new study published in The Endocrine Society's Journal of Clinical Endocrinology & Metabolism found that obese women have detrimental changes in their ovaries, leading to poorer reproductive outcomes. Alterations in egg development and increased inflammation may contribute to infertility, the researchers suggest.

SourceThe Endocrine Society·JournalThe Journal of Clinical Endocrinology & Metabolism·DateMar 3, 2009