Add BrightSurf on Google Email

Science News Archive 2006 - Page 61


Page 61 of 178

Estrens might not be the answer for osteoporosis

A new study questions the use of estrens as estrogen-like molecules for treating osteoporosis. Estrens improved bone strength in mice, but also caused adverse effects on reproductive organs and human breast cancer cells. Further clinical trials are needed to determine their safety.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateSep 1, 2006

Highlights from the September 2006 Journal of the American Dietetic Association

According to researchers at the US Department of Agriculture and the National Cancer Institute, most Americans do not meet daily recommended amounts of fruits and vegetables. The new MyPyramid recommendations are 2 to 6 ½ cups per day, with only 17 percent of women age 51-70 meeting their combined recommendation. Salad consumption is p...

SourceAmerican Dietetic Association·JournalJournal of the American Dietetic Association·DateSep 1, 2006

JCI table of contents: September 1, 2006

Researchers found that estrens improved bone strength in mice with osteoporosis but also had adverse effects on reproductive organs and human breast cancer cells. This study suggests caution is needed for the development of estrens as a treatment for osteoporosis.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateSep 1, 2006

Mayo clinic discovers new type of sleep apnea

Researchers at Mayo Clinic have identified a new type of sleep apnea called complex sleep apnea, which is a combination of obstructive and central sleep apneas. Complex sleep apnea patients often appear to have obstructive sleep apnea but do not fully respond to CPAP machines.

SourceMayo Clinic·JournalSLEEP·DateSep 1, 2006

New findings could lead to vaccine for severe malaria

Researchers at Karolinska Institutet in Sweden and Makerere University in Uganda have identified how the malaria parasite conceals itself in the placenta, paving the way for a potential vaccine. The study found that several receptors on the placenta are involved in binding to the parasite, contrary to previous laboratory studies.

SourceKarolinska Institutet·JournalProceedings of the National Academy of Sciences·DateSep 1, 2006

The lower the blood pressure the better

A new study published in the Lancet found that aggressive treatment to lower blood pressure significantly reduces the risk of stroke and heart attack. The research, which involved over 160,000 individuals in 50 countries, highlights the importance of driving blood pressure down to very low levels rather than choosing specific medications.

NASA study solves ocean plant mystery

Scientists determined that nitrogen is the primary element missing for algae growth in the northern tropical Pacific, while iron was lacking everywhere else. The 'iron-effect' decreases carbon ocean plant photosynthesis estimates by two billion tons, allowing for more accurate carbon movement modeling and resource management.

Diode laser could be vital for safeguarding aircraft

A new type of diode laser, called quantum cascade lasers (QCLs), may revolutionize aircraft protection by emitting high-power light at specific wavelengths. The QCLs can operate at room temperature and have a power conversion efficiency of 10 percent, making them ideal for widespread use in infrared countermeasure systems.

SourceNorthwestern University·JournalApplied Physics Letters·DateAug 31, 2006

Viral oncoprotein inactivation of p53

A team of scientists led by Dr. Xiaojiang Chen have uncovered the molecular mechanism behind how a viral oncoprotein inactivates p53. The study reveals that the viral protein binds to p53, causing a conformational change that prevents it from binding to DNA and thus abolishes its tumor-suppressing function.

SourceCold Spring Harbor Laboratory·JournalGenes & Development·DateAug 31, 2006

Tumor necrosis factor blockers may not cause cancer after all

Researchers investigated association between TNF blocker use and cancer risk in RA patients. They found no increased risk of lymphoma or tumors associated with anti-TNF therapy over methotrexate use. The study used a large sample of patients and found an overall difference in estimated cancer risk less than 5 percent.

SourceWiley·JournalArthritis & Rheumatism·DateAug 31, 2006

Orange juice is better than lemonade at keeping kidney stones away

A daily glass of orange juice can boost citrate levels in the urine and reduce crystallization of uric acid and calcium oxalate, two common ingredients in kidney stones. In contrast, lemonade did not increase citrate levels, suggesting that its constituents counteract the beneficial effects of high citrate content.

SourceUT Southwestern Medical Center·JournalClinical Journal of the American Society of Nephrology·DateAug 31, 2006

Cell's fight against cancer revealed

A University of Southern California-led research group used X-ray crystallography to study the struggle between LTag, a cancer-causing protein, and p53, a key tumor suppressor. The study found that LTag inhibits p53's role by tying up six molecules, but p53 fights back by preventing virus replication.

SourceUniversity of Southern California·JournalGenes & Development·DateAug 31, 2006