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Science News Archive February 2007 - Page 2


Page 2 of 16

Eating ice cream may help women to conceive, but low-fat dairy foods may increase infertility risk

Researchers found that consuming whole fat milk and eating ice cream reduces the risk of anovulatory infertility in women trying to become pregnant. In contrast, a diet consisting of low-fat dairy products increases the risk by up to 85%. Women are advised to switch from low-fat to high-fat dairy foods to improve fertility.

Public welcomes workers with intellectual disabilities, Queen's poll finds

A Queen's University poll found that 65% of respondents believe workers with intellectual disabilities should work alongside those without ID, while 71.1% note a lack of job training programs as a major obstacle to workplace inclusion. The study suggests that public attitudes are not a barrier to keeping workers with ID in the workplace.

SourceQueen's University·JournalJournal of Vocational Rehabilitation·DateFeb 27, 2007

New guide to sharks and rays of Indonesia

A five-year survey of catches at local fish markets provided the first detailed description of Indonesia's shark and ray fauna. The Australian Centre for International Agricultural Research published a 330-page field guide, Economically Important Sharks and Rays of Indonesia, featuring over 20 new species.

CNSE reports breakthrough in production of exposed images using ASML EUV R&D lithography tool

The College of Nanoscale Science and Engineering has successfully produced the world's first exposed images using the ASML EUV research and development tool. This achievement supports the R&D programs of the $600M International Venture for Nanolithography consortium, which includes global industry-university collaborations.

Cancer cells forming blood vessels send their copper to the edge

Researchers discovered that cancer cells forming blood vessels exhibit a distinct distribution of cellular copper, which may help explain how copper-reducing cancer therapy works. This finding has implications for understanding the regulation of metal ion content in metal-binding proteins and could lead to new cancer therapies.

SourceDOE/Argonne National Laboratory·JournalProceedings of the National Academy of Sciences·DateFeb 27, 2007

HPV infection common among females in US

A national study estimates that approximately 1 in 4 U.S. females between 14 and 59 years old may have HPV infection, with the highest prevalence among younger women. The study also found a significant trend for increasing HPV prevalence with age, followed by a decline through 59 years.

SourceJAMA Network·JournalJAMA·DateFeb 27, 2007

Brain maps online

Researchers at UC Davis have created digital brain atlases with high-resolution whole-brain images, enabling virtual microscopy for comparison of healthy brains with those affected by neurological diseases. The online platform allows users to explore and analyze brain data using free downloadable tools.

SourceUniversity of California - Davis·JournalNeuroImage·DateFeb 27, 2007

Nectar is not a simple soft drink

Researchers discovered that plant nectar contains secondary compounds, including nicotine, which repel pollinators and attract 'nectar thieves'. This finding suggests that plants may produce nectar to increase genetic diversity by attracting more visitors despite the potential risk of poisoning insects.

SourceBlackwell Publishing Ltd.·JournalThe Plant Journal·DateFeb 27, 2007

Mistaken identity? When a white marlin may not always be a white marlin

A team of scientists has confirmed the existence of an enigmatic billfish species, the roundscale spearfish, which overlaps with the distribution of the white marlin. The discovery raises concerns about the true numbers of threatened white marlin populations and suggests that recent population assessments may have been overestimated.

Smoking may be a risk factor for tuberculosis

A meta-analysis of 24 studies found that smokers are 40-60% more likely to develop tuberculosis disease after infection, with a 73% increased risk of becoming infected. Smoking may also decrease immune response or damage airway cilia, increasing TB risk.

SourceJAMA Network·JournalArchives of Internal Medicine·DateFeb 26, 2007

A climate-change amplifying mechanism

A feedback mechanism between North Atlantic and tropical hydrology of Central America amplifies the effects of climate change on oceanic circulation. This mechanism, highlighted by scientists at CEREGE1, shows that changes in oceanic circulation influence global water cycle patterns and climatic equator shifts.

SourceCNRS·JournalNature·DateFeb 26, 2007

Mellow in Europe, crazy in America

A UVM study reveals that reed canarygrass's invasive power comes from its history of multiple introductions and interbreeding with European strains, allowing it to adapt quickly to new conditions. This phenomenon has significant implications for the potential invasiveness of other horticultural and agricultural plants.

SourceUniversity of Vermont·JournalProceedings of the National Academy of Sciences·DateFeb 26, 2007

Patients with type 1 diabetes don't wake in response to hypoglycemia

A study of patients with type 1 diabetes and healthy individuals found that only one patient with T1DM woke up in response to hypoglycemia, compared to ten healthy control participants. The researchers also discovered that increases in plasma epinephrine concentration preceded polysomnographic signs of wakefulness.

SourcePLOS·JournalPLOS Medicine·DateFeb 26, 2007

Is most published research really false?

Researchers debate the validity of published research findings, exploring the role of replication in confirming hypotheses. New models suggest that probabilities for accepting false research findings depend on benefits and harms, sparking discussion on acceptable levels of error.

SourcePLOS·JournalPLOS Medicine·DateFeb 26, 2007

What do we know about asthma in Africa?

The prevalence of asthma and allergic diseases has significantly increased in Ghana between 1993 and 2003. According to a study, the prevalence of exercise-induced bronchospasm and atopy doubled over this period, posing concerns for public health in West Africa.

SourcePLOS·JournalPLOS Medicine·DateFeb 26, 2007

UC Davis researchers discover key to body's ability to detect subtle temperature changes

Researchers at UC Davis have made a groundbreaking discovery about the body's temperature sensing capabilities. By reassembling subunits from different ion channels, they found that there are more than six channel types responsible for sensing temperature, which could help solve the mystery of thermosensitivity in animals.

SourceUniversity of California - Davis Health·JournalJournal of General Physiology·DateFeb 26, 2007

How T lymphocytes attack

Researchers used two-photon microscopy to visualize T lymphocyte infiltration into solid tumours in real-time. T lymphocytes target tumour cells by recognizing the antigen and binding with enzymes, ultimately leading to cell death.

SourceCNRS·JournalJournal of Experimental Medicine·DateFeb 26, 2007