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Science News Archive 2006


Page 123 of 178

Living Oceans Foundation leads Red Sea expedition

The Khaled bin Sultan Living Oceans Foundation is conducting a pioneering study on the Farasan Islands Marine Protected Area off the coast of Saudi Arabia. The research will assess the effects of ecotourism, pollution, over-fishing, climate change, dredging, and development on coral reefs.

Lack of a key enzyme dramatically increases resistance to sepsis

A study published in Nature found that caspase-12 deficient mice are resistant to peritonitis and septic shock, clearing pathogenic bacteria more efficiently. The absence of caspase-12 reduces pro-inflammatory cytokine production, increasing vulnerability to bacterial infection and septic mortality.

LSUHSC public health documents unmet health needs of Katrina-displaced

The study found that 34% of children living in FEMA-subsidized community settings have at least one diagnosed chronic medical condition, with high rates of asthma and behavioral problems. The survey also revealed difficulties in accessing mental health services, with nearly half of caregivers scoring at levels consistent with clinicall...

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Cholesterol gets 'thumbs up' for role in digit development

Research at Vanderbilt University Medical Center found that cholesterol attachment to the developmental protein Sonic hedgehog controls finger and toe development in mice. Without cholesterol, mice developed extra digits and malformed toes.

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Social networks protect against Alzheimer's

Researchers found that larger social networks are associated with reduced cognitive impairment in people with Alzheimer's disease pathology. The study suggests that healthy interactions with friends and family can have a positive impact on disease prevention.

Diverse tropical forests defy metabolic ecology models

A recent study challenges metabolic ecology models, which failed to explain tropical forest structure and dynamics. Instead, researchers found that environmental conditions and species traits play a crucial role in shaping these ecosystems.

New hybrid virus provides targeted molecular imaging of cancer

Researchers have developed a new hybrid virus that can target tumors systemically to deliver an imaging or therapeutic gene, allowing for the monitoring of drug effectiveness at the molecular level. This breakthrough could lead to improved diagnosis, monitoring, and treatment of human cancers.

Fertility drugs given 'all-clear' in new study

A new study examining 911 babies treated with either letrozole or clomiphene citrate found no statistically significant difference in major and minor malformations or chromosomal abnormalities between the two groups. The findings confirm concerns about a link between letrozole and birth defects are unfounded.

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Mapping the foundation of human development

Researchers successfully mapped the regulatory circuitry of human embryonic stem cells using microarray technology. The study reveals that Polycomb group proteins play a crucial role in repressing genes essential for later development, leading to uncontrolled growth when these genes are lost.

Formation of cellulose fibers tracked for the first time

For the first time, researchers have tracked cellulose fiber formation in real-time, providing evidence of a functional connection between cellulose synthase and microtubules. This breakthrough discovery has significant implications for designing energy-rich biofuel crops and improved fiber crops.

Celestron NexStar 8SE Computerized Telescope

Celestron NexStar 8SE Computerized Telescope combines portable Schmidt-Cassegrain optics with GoTo pointing for outreach nights and field campaigns.

Protein's potential as a regulator of brain activity discovered

Scientists have discovered that agrin controls nerve cell excitability by regulating sodium pump activity in the brain, potentially leading to new treatments for epilepsy. Agrin also regulates potassium levels in heart tissue, raising the possibility of its use in treating congestive heart failure.

The diabetes epidemic – obesity a major factor

Data from the National Health Interview Survey show a significant link between obesity and increasing diabetes incidence. Lifestyle interventions, including moderate weight loss and exercise, can prevent or delay diabetes onset in high-risk adults.

Dynamic duo: Combination therapy reverses type 1 diabetes

Researchers found a synergistic combination of a low-dose CD3 antibody and proinsulin peptide to reverse recent-onset type 1 diabetes in mice, promoting pancreatic beta cell regeneration. This approach may hold great potential for the treatment of individuals with recent-onset type 1 diabetes.

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Geologists: Opening of passage may be tied to Antarctic cooling

Researchers used neodymium isotopes in tiny fish teeth to date the Drake Passage opening and confirm it was earlier than previously thought, potentially contributing to Antarctica's cooling. The circumpolar current isolated the continent from warm waters, leading to upwelling of cold water and growth of algae that consumed carbon dioxide.

Laos – a lost world for frogs

A recent study documents six new frog species found in Laos over a two-year period, showcasing the country's remarkable biodiversity. Conservationists are concerned about the combined loss of forest cover and over-exploitation of species threatening much of Laos' wildlife.

Ancient DNA provides clues to the evolution of social behavior

Researchers used ancient and modern DNA to study the decline of Ctenomys sociabilis, a colonial tuco-tuco species. The analysis suggests that population bottlenecks and environmental changes led to the loss of genetic diversity, but also hints at the evolution of social behavior.

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JCI table of contents, April 20, 2006

Researchers develop a combination therapy that reverses recent-onset type 1 diabetes in mice by inducing regulatory T cells to shield insulin-producing cells from autoimmune destruction. The therapy, which combines an oral and intranasal treatment, shows greater efficacy than individual treatments alone.

HHMI's experiment in changing scientific culture

HHMI's Janelia Farm Research Campus aims to promote high-risk, high-reward research by providing internal funding and a flexible environment. The campus will feature small research groups, active bench scientists, and excellent support facilities.

ERS-2 helps detect massive rivers under Antarctica

Researchers using ERS-2's radar altimetry and InSAR found anomalies in ice-sheet surface elevation, suggesting large floods of water from deep within the ice may have generated huge floods that reached the ocean. The discovery raises concerns about ancient life in subglacial lakes.

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Pituitary hormone implicated in bone loss after menopause

Researchers find that high FSH levels are necessary for bone loss in postmenopausal women, suggesting an alternative approach to prevent osteoporosis. The study reveals a direct link between pituitary-derived hormones and bone remodeling, revising the understanding of pituitary hormone physiology.

Study in Science holds promise for a new approach to drug therapy

Scientists at the University of Rochester Medical Center have found a mechanism to modify the effects of major drug class, potentially leading to better control of pain relief, inflammation, and heart disease. The new drugs aim to influence related signaling on the inside of cells, rather than on the outside.

LIAI scientists make major finding on potential cure for type 1 diabetes

Researchers at La Jolla Institute for Immunology have made a major finding on a potential cure for type 1 diabetes by combining two therapies, producing better efficacy and longer-lasting results in preclinical trials. The combination therapy is being planned to begin human clinical trials later this year.

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Discovery points to more effective ways of regulating cell signalling

The study found that the three-dimensional structure of SOCS3 enables the design of selective inhibitors, which may extend the activity of G-CSF in restoring white blood cells. Additionally, an engineered version of SOCS3 with improved stability and repressive functions shows potential for treating inflammatory diseases.

Novel molecular 'signature' marks DNA of embryonic stem cells

Researchers at the Broad Institute found an unusual molecular structure near developmental genes that enables embryonic stem cells to maintain their unique plasticity. This 'bivalent domain' acts as a kind of gene gatekeeper, controlling the expression of crucial genes in early development.

US, China cooperate on high-energy physics experiment

Rice University is leading an international team in building a cylindrical bank of over 23,000 particle detectors for the Solenoidal Tracker at RHIC. The collaboration, valued at $7 million, demonstrates robust scientific cooperation between US and Chinese institutions.

Apple iPad Pro 11-inch (M4)

Apple iPad Pro 11-inch (M4) runs demanding GIS, imaging, and annotation workflows on the go for surveys, briefings, and lab notebooks.

Cornell study finds that galaxies cluster near dark matter

A Cornell University study reveals that galaxies in the early universe tend to cluster near large clumps of dark matter. The research uses data from the Spitzer Wide-area InfraRed Extragalactic survey and confirms that ultraluminous infrared galaxies are precursors to galaxy clusters.

Bullying keeps overweight kids off the field

A new study by University of Florida researchers found that bullying among overweight children is linked to lower rates of physical activity and depression. The study suggests that positive support from family and friends can help mitigate the negative effects of bullying on exercise habits.

AmScope B120C-5M Compound Microscope

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Massive marsh planting to begin in coastal Alabama and Mississippi

A massive marsh planting project is set to begin in coastal Alabama and Mississippi, aiming to restore salt marshes and their ecosystem services. The project, led by Dr. Cebrian, will focus on restoring black needlerush and other plant species, and will involve the coordinated efforts of researchers, resource managers, and volunteers.

Impact of rainfall reaches to roots of mountains

A University of Toronto study reveals that rainfall-induced erosion significantly impacts tectonic plate behavior, extending to the mantle thermal engine. The research suggests subtle surface weathering could shift plates over millions of years.

Sony Alpha a7 IV (Body Only)

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How embryonic stem cells maintain their identity

Researchers found that Polycomb proteins repress developmental genes, while bivalent domains mark key genes with both repressive and activating characteristics. This helps explain embryonic stem cell stability and differentiation potential.

Nikon Monarch 5 8x42 Binoculars

Nikon Monarch 5 8x42 Binoculars deliver bright, sharp views for wildlife surveys, eclipse chases, and quick star-field scans at dark sites.

Cancer therapy based on anatomical location may soon be obsolete

Researchers found that cancer treatment effectiveness is independent of tumor type, and varying levels of specific proteins determine drug response. This study suggests a new approach to treating cancer by selecting therapies tailored for individual patients instead of one-size-fits-all approaches.

Injuries from lawn mowing increase nationwide

A study by Johns Hopkins Bloomberg School of Public Health reveals over 663,000 people treated in US emergency rooms for lawn mower injuries between 1996 and 2004. Safety tips, such as wearing protective gear and keeping children away, are crucial to preventing these injuries.

Fruitfly study shows how evolution wings it

Researchers discovered that fruitfly wing spots evolved through mutations in cis-regulatory elements controlling the yellow gene, demonstrating how evolution uses existing genetic material to create new traits. The study also highlights the importance of pleiotropic genes in evolution.

Rigol DP832 Triple-Output Bench Power Supply

Rigol DP832 Triple-Output Bench Power Supply powers sensors, microcontrollers, and test circuits with programmable rails and stable outputs.

St. Jude unlocks mystery of very aggressive leukemia

Researchers at St. Jude Children's Research Hospital found that a combination of the Bcr-Abl mutation and loss of both Arf genes in bone marrow cells triggers an aggressive form of ALL. Inactivating both Arf genes enables leukemic cells to multiply despite imatinib treatment, highlighting potential strategies for overcoming resistance.