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Science News Archive 2005 - Page 9


Page 9 of 165

Changes to land cover may enhance global warming in Amazon, reduce it in midlatitudes

Land use changes in the Amazon region could exacerbate global warming due to deforestation, while agriculture in midlatitudes can counteract warming by up to 50%. The study utilized a global climate model to examine two scenarios from the Intergovernmental Panel on Climate Change and found contrasting results

Physicists demonstrate storage and retrieval of single photons between remote memories

Researchers at Georgia Institute of Technology have successfully stored and retrieved single photons between remote quantum memories composed of rubidium atoms. This breakthrough demonstrates the storage of light-based information in matter, a necessary step for transmitting quantum information long distances through optical fibers.

Similar stem cells in insect and human gut

Researchers have discovered that adult fruitflies have the same stem cells controlling cell regulation in their gut as humans do. This finding is significant for understanding digestive disorders, including some cancers, and developing cures. The similarity between insect and human gut stem cells suggests a common evolutionary origin.

TLR4 gene found to protect against tumor development

Researchers at the National Institute of Environmental Health Sciences discovered that the TLR4 gene plays a critical role in protecting against tumor development and chronic inflammation. This finding suggests targeting the innate immune system may be a useful tool in fighting various human diseases, including cancer.

SourceNIH/National Institute of Environmental Health Sciences·JournalJNCI Journal of the National Cancer Institute·DateDec 7, 2005

A Jekyll-and-Hyde enzyme's role in Alzheimer's

Researchers discovered that a Jekyll-and-Hyde enzyme plays a crucial role in Alzheimer's disease. Transient production of the enzyme p25 enhances learning and memory, whereas chronic expression impairs these cognitive functions. The study uses mice to demonstrate the dual effects of p25 on neural mechanisms.

SourceCell Press·JournalNeuron·DateDec 7, 2005

Acne, milk and the iodine connection

Researcher Harvey Arbesman links acne and dairy products to the presence of iodine in milk. Studies have shown significant iodine levels in various countries' dairy products. Iodine intake has been linked to acne exacerbation since the 1960s.

SourceUniversity at Buffalo·JournalJournal of the American Academy of Dermatology·DateDec 7, 2005

Gene loops

Researchers at Cold Spring Harbor Laboratory have identified a new mechanism for gene regulation known as 'gene loops', which play a crucial role in controlling the expression of genes. This discovery has significant implications for our understanding of gene function and regulation.

SourceCold Spring Harbor Laboratory·JournalGenes & Development·DateDec 7, 2005

Groundbreaking guidelines promote early detection

The new guidelines provide a concise diagnostic and treatment guide for patients with PAD. They emphasize the importance of early detection and treatment, recommending specific questions, clinical clues, and therapeutic choices to maintain functional independence and decrease the risk of heart attack, stroke, and death.

SourceAmerican College of Cardiology·JournalJournal of the American College of Cardiology·DateDec 6, 2005

Other highlights in the December 7 JNCI

A new study in mice found that chronic stress and UV radiation suppress the immune system, leading to increased tumor formation and quicker disease progression. Researchers observed suppression of T-cell function and type 1 cytokines, highlighting the potential for chronic stress to increase cancer risk.

SourceJournal of the National Cancer Institute·JournalJNCI Journal of the National Cancer Institute·DateDec 6, 2005