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Science News Archive 2009 - Page 159


Page 159 of 277

New cleaning protocol for future 'search for life' missions

Scientists at the University of Leeds and NASA have developed a new cleaning protocol to ensure that Earth-based microorganisms don't contaminate Mars samples. The protocol was tested on various sampling devices, including rover scoops and glacial ice core drills, and found to effectively remove detectable organic biosignatures.

SourceUniversity of Leeds·JournalAstrobiology·DateJun 8, 2009

Stopping diabetes damage with vitamin C

Researchers found that a combination of insulin and vitamin C stopped blood vessel damage caused by Type 1 diabetes in patients with poor glucose control. The therapy's effectiveness was proven in humans for the first time, offering hope for diabetic patients to avoid complications.

SourceUniversity of Oklahoma·JournalThe Journal of Clinical Endocrinology & Metabolism·DateJun 8, 2009

An estimated 4 percent of older US men have dry eye disease

A study estimates that approximately 1.68 million US men over 50 years old suffer from dry eye disease, which increases with age and is associated with high blood pressure and certain medications. The prevalence of the condition rises significantly among older men, particularly those aged 75 and above.

SourceJAMA Network·JournalArchives of Ophthalmology·DateJun 8, 2009

Enigmatic sea urchin structure catalogued

A comprehensive investigation into sea urchins' axial complex has shown that various internal organs are structurally linked. The study uses high-resolution imaging to analyze specimens from multiple orders, providing a re-evaluation of published studies spanning two centuries.

SourceBMC (BioMed Central)·JournalFrontiers in Zoology·DateJun 8, 2009

Cardiac rehabilitation saves lives

A large Brandeis University-led study found that cardiac rehabilitation significantly reduces mortality rates among older adult patients with heart disease. The study showed a 19% lower risk of death for those attending more than 24 sessions, and the benefits were most pronounced in extreme elderly patients.

SourceBrandeis University·JournalJournal of the American College of Cardiology·DateJun 8, 2009

UT Southwestern research reveals how cells tell time

Researchers at UT Southwestern Medical Center used the fungus Neurospora to study the biochemistry and genetics of body clocks. They found that a protein called FRQ marks time by a sequence of changes in its chemical structure, which controls many biological processes including cell division, hormonal release, and sleep/wake cycles.

SourceUT Southwestern Medical Center·JournalProceedings of the National Academy of Sciences·DateJun 8, 2009

Cognitive impairment is associated with reduced survival among both African-Americans and whites

A new study by Rush University Medical Center researchers found that cognitive impairment is associated with reduced survival among both African-Americans and whites. The study, published in Archives of Neurology, showed that participants with mild cognitive impairment had a 50% increased risk of death compared to those without cogniti...

SourceRush University Medical Center·JournalArchives of Neurology·DateJun 8, 2009

Cognitive impairment linked to reduced survival regardless of race

A recent study published in Archives of Neurology found that cognitive impairment is associated with reduced survival rates among both white and African American older adults. The research, which followed 1,715 participants over an average of 4.7 years, showed that individuals with mild cognitive impairment or Alzheimer's disease had s...

SourceJAMA Network·JournalArchives of Neurology·DateJun 8, 2009

Medical therapy equal to bypass, angioplasty in patients with diabetes and stable heart disease

A new study finds that optimal medical therapy is equally effective as revascularization procedures like bypass surgery or angioplasty in lowering the risk of death and cardiovascular events in patients with diabetes and stable coronary heart disease. Insulin-providing and insulin-sensitizing drugs are also shown to be equally effective.

SourceNIH/National Heart, Lung and Blood Institute·JournalNew England Journal of Medicine·DateJun 7, 2009

Death rates same for diabetes and heart disease patients receiving drug therapy or surgery

A landmark study found that prompt bypass surgery has the same five-year survival rate as drug therapy alone for patients with type 2 diabetes and stable heart disease. In contrast, bypass surgery lowered the risk of subsequent major cardiac events, particularly in those with severe heart disease.

SourceUniversity of Pittsburgh Schools of the Health Sciences·JournalNew England Journal of Medicine·DateJun 7, 2009