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Science News Archive August 1999


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Study shows black churches can help improve healthy behaviors

A large-scale study found that participating in church-related activities increased fruit and vegetable consumption among black church members. The study involved 50 black churches and over 2,500 participants, with the most significant increases seen among frequent churchgoers.

Physical exercise improves cancer patients' health

Cancer patients who participate in regular physical exercise programs show significant improvements in physical and mental health, including enhanced stamina, muscle strength, and pain management. The studies found that exercise has a positive effect on quality of life, including functional, psychological, and emotional well-being.

Public strongly associates violence with mental illness

A majority of Americans believe certain types of mental illnesses cause violent behavior, with over 90% linking stress as a cause. This stereotype persists despite recognition of mental illness and its causes, leading to social distance and reluctance to interact.

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Researchers discover genetic basis of heritable sleep disorder

A team of researchers has identified a single gene that causes familial advanced sleep phase syndrome (FASPS), a rare sleep disorder. The study found that the disorder follows a simple Mendelian inheritance pattern, making it easier to find the responsible gene and potentially leading to new treatments for circadian rhythm disorders.

Federal, private funding to establish inflammatory disease center at UNC

The new center will conduct studies and educational activities to understand the underlying mechanisms of inflammatory diseases and their relationship to oral inflammation and systemic conditions. The research aims to improve diagnosis and treatment of patients by identifying similarities between inflammatory conditions.

Aging hearts need social support

A recent study found that older adults with strong social connections have lower blood pressure and are less likely to develop heart disease. In contrast, those with low social support experience higher resting blood pressures, even at a younger age.

The effects of St. John's Wort (Hypericum perforatum)

Research published in Molecular Psychiatry found St. John's Wort to have a better antidepressant effect than placebo and comparable effects to standard antidepressants. The herb's favorable side effect profile may contribute to its advantages over other medications.

Stigma of mental illness still exists

A new national survey reveals evidence of stigma toward mentally ill individuals, viewing them as less competent and more violent. The study found that people with schizophrenia are viewed as more unable to manage daily affairs than those with depression.

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DNA fingerprinting reveals surprise in wine-grape family tree

Researchers used DNA fingerprinting to identify 16 wine-grape varieties, including Chardonnay, as the offspring of Pinot and Gouais blanc. This discovery provides valuable information for grape breeders, allowing them to preserve old varieties and develop new ones.

Cigarette brand switchers more likely to quit smoking

Smokers who switch to lower tar or nicotine cigarettes for 'health reasons' are more likely to quit smoking compared to those who continue to smoke regular cigarette brands. Researchers found that 'switchers' were less dependent on nicotine and had a higher intake of fruits and vegetables.

Non-drug techniques help reduce symptoms of fibromyalgia

Patients with fibromyalgia syndrome experience significant improvements in physical condition, symptom reports, and mental state when using non-drug treatments like exercise and cognitive behavioral therapy. Non-drug techniques were found to be superior to medication alone in reducing symptoms and improving daily functioning.

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Chandra observes star's corona with unprecedented clarity

The High Energy Transmission Grating Spectrometer has made the most precise measurements ever recorded of a star's corona, revealing new insights into stellar behavior. The instrument's success marks a major milestone for modern astronomy, enabling scientists to study the chemical composition and temperature of the corona with unpreced...

Study finds parental influence still important during adolescence

A study at Ohio State University found that parents continue to have a significant influence on their adolescents' behavior throughout the teen years. The research tracked 1,725 children for five years, revealing that the effect of friends and school grew during early adolescence, but parental influence remained steady.

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Some adults believe illness can be 'payback' for bad behavior

A new study reveals that up to 44% of adults believe in the concept of 'immanent justice,' where bad behavior leads to severe illnesses. The study, conducted by Ohio State University researchers, found that language plays a significant role in shaping beliefs on this topic.

3-D, virtual man simulates radiation's effect on the body

Xie George Xu's 3D virtual man, VIP-Man, simulates radiation's effect on the skin, lens of the eye, optic nerve, and bone marrow with high accuracy. The model will enable accurate treatment planning for diseases requiring radiation therapy, revolutionizing radiation dosimetry in biomedical sciences and engineering.

Microbes in basalt thrive on mixed diet of toxic waste

Scientists discovered that microorganisms in basalt rock can reduce toxic hexavalent chromium to less toxic forms, especially in the presence of volatile organic compounds. The researchers found that certain bacteria, such as Arthrobacter oxydans, play a key role in this process.

Landmark obesity study

Researchers at Denver's Eleanor Roosevelt Institute have identified a gene linked to obesity in mice, which also plays a role in humans. The study suggests that targeting this gene could lead to effective weight control and potentially even help with diseases like Down syndrome and epilepsy.

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Scientists suggest genetic shutdown links estrogen, heart disease

Researchers found that methylation of estrogen receptor genes may be linked to atherosclerosis and increased risk of heart disease in women. The study suggests that a genetic shutdown may contribute to the perplexing results of hormone replacement therapy on heart disease.

Inflammatory pain may help deter inflammatory diseases like arthritis

Researchers at UC San Francisco found that activated pain nerve fibers dampen the inflammatory response's first line of attack, preventing chronic diseases. The study suggests that pain acts as a negative feedback control of inflammation, which can help prevent chronic inflammatory diseases.

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Gene protects tubby mouse strain from hearing loss

Researchers at The Jackson Laboratory have identified a chromosomal region that interacts with the tub mutation to prevent deafness in the tubby mouse model. The region, known as moth1, maps to mouse Chromosome 2 and was found to protect C57BL/6J mice from hearing loss.

Students get better grades when tested frequently in class

According to Bruce W. Tuckman, frequent quizzes can significantly improve students' grades by reducing procrastination and increasing motivation. Students with low GPAs who received weekly quizzes outperformed their peers by an average of 4-24% on midterm and final exam grades.

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UMass polymer scientists: Tackiness is a matter of degrees

Researchers at the University of Massachusetts have created a switchable adhesive coating that relies on temperature changes to control its stickiness. This technology has potential applications in self-cleaning tennis racquets and golf club grips, improving performance and durability.

Natural repellant in Spanish cedar leaves could help tropical forests

Researchers have identified four new limonoids in Spanish cedar leaves that repel a specific insect pest, potentially helping protect endangered primary forests. Selecting seedlings with high concentrations of these substances may aid plantation-raised Spanish cedars and reduce the need for synthetic insecticides.

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New satellite tools putting hurricanes in sharper focus

The new satellite-based tools provide unprecedented insights into tropical cyclones, allowing scientists to break them down into their component parts. This 'data fusion' technique enables the development of advanced hurricane forecasting methods, such as Wavetrak, which sheds light on the origin and intensity of these storms.

Study reveals how brain controls eating in normal rats

Researchers have shown how the fat hormone leptin works in the brain to trigger nerve cells that control eating. Leptin activates 'anorectic' nerve cells releasing appetite-suppressing neuropeptides, while inhibiting 'orexigenic' cells that release appetite-regulatory neuropeptides.

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Unprotected anal sex increasing in San Francisco

A study of 500 young gay men in San Francisco found that unprotected anal sex increased by a third to a half in four years. Approximately half of these cases involved partners of unknown or different HIV status.

New MIT probe gathers data for better polymers

Researchers at MIT have developed a new probe that can detect the motion of molecules in polymers as they are being stretched. This breakthrough allows for a fundamental understanding of polymer behavior, which can improve material design and mechanical properties.

Brisk walking reduces risk of heart attack in women

A new study published in the New England Journal of Medicine found that brisk walking can reduce the risk of fatal and non-fatal heart attacks in women by 30-40%. The study analyzed data from the Nurses' Health Study, estimating one-third of coronary events among middle-aged women result from physical inactivity.

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The force of gravity is the same for atoms and baseballs

Stanford researchers used atom interferometry to measure the force of gravity on individual atoms with unprecedented accuracy. Their findings strengthen the likelihood that previous neutron interferometry experiments were incorrect, validating the power of atom interferometry as a precise measurement tool.

Honey in the medicine cabinet!

A key study by Dr. Peter C. Molan presents the latest research on honey's effectiveness in treating wounds caused by antibiotic-resistant strains of bacteria. The results show that honey dressings can rapidly clear bacteria from infected wounds, making it a potential treatment for necrotising fasciitis.

New sensing device reads chemical makeup in real-time

Purdue University researchers developed a Near-Infrared Raman Imaging Microscope called NIRIM, which can analyze composite materials in real time. The instrument uses laser light to fingerprint samples as they are viewed under a microscope, providing detailed chemical information.

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Agency awards $8.2 million to study how air pollution affects us

The US Environmental Protection Agency has awarded $8.2 million to the University of Washington for a research center studying air pollution and its effects on human health. The Northwest Research Center will examine fine particles, particulate matter under 2.5 microns in size, and their association with daily health outcomes.

New DNA vaccine could fight fish disease

A new DNA vaccine has been developed to protect North American salmon and trout farms from a major disease, with successful trials showing 90% reduction in mortality. The vaccine works by introducing DNA containing the gene for one of the viral proteins, which is then taken up by cells and produces the protein to prime the immune system.

Double transplant frees patient from need for immunosuppressive drugs

Physicians at Massachusetts General Hospital have successfully induced a state of immune tolerance in a patient, allowing her to discontinue immunosuppressive drug treatment without rejecting a transplanted kidney. The breakthrough approach, known as mixed chimerism, has the potential to revolutionize organ transplantation for thousand...

GoPro HERO13 Black

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Gulf Coast environmental issues -- Tip sheet

Researchers have found detectable levels of tributyltin in Gulf oysters, which can be toxic to crustaceans. Additionally, the Mississippi River has shown improvement in water quality, with a decrease in volatile organic compounds detected since 20 years ago.

Trouble for the world's turtles

Sixty experts agree that half of the world's turtle species are at risk of extinction due to human consumption. The main causes of decline are linked to ecological change, while exploitation drives 50% of threatened turtles to extinction.