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Science News Archive November 1999 - Page 6


Page 6 of 6

A key to depression

Scientists discovered that Prozac increases new neurons in rats' brains by 69% compared to controls. This finding may explain why people recover from depression with SSRIs. The study also suggests serotonin's role in treating other neurological diseases like Alzheimer's.

SourceNew Scientist·JournalThe New Scientist·DateNov 2, 1999

Why are the elderly so easily fooled by con artists?

Research suggests that some older adults have impaired decision-making skills, making them more vulnerable to fraudulent activities. A study found that a third of healthy individuals in their 60s performed poorly on a gambling task, similar to those with known brain damage.

SourceNew Scientist·JournalThe New Scientist·DateNov 2, 1999

Lasers clean fossils in no time

Physicists at Lawrence Livermore National Laboratory are developing a control system that switches off a cutting laser when it detects phosphorus, allowing for quick and efficient fossil cleaning. This technique could significantly reduce the time-consuming process of preparing fossils by hand, especially for delicate or soft bones.

SourceNew Scientist·JournalThe New Scientist·DateNov 2, 1999

UC researchers use Doppler ultrasound

Researchers at UC have developed a novel method for detecting early signs of artery blockages using Doppler ultrasound, which can accurately predict turbulence intensity and detect atherosclerosis. This non-invasive technique is safer than current methods requiring ionizing radiation or pressure transducer insertion.

Research challenges conventional thinking on ways to treat prostate cancer

Researchers at Memorial Sloan-Kettering Cancer Center challenge current understanding of prostate cancer treatment by showing that testosterone withdrawal triggers a dormant state in tumor cells, rather than causing widespread cell death. This study offers new hope for developing targeted therapies to combat recurrent prostate cancer.

SourceMemorial Sloan Kettering Cancer Center·JournalJNCI Journal of the National Cancer Institute·DateNov 1, 1999

Chromosome changes predict more deadly prostate tumors

Men with specific chromosome 8 abnormalities have a 30% survival rate after 10 years, compared to 78% for those with normal chromosomes. The findings could help identify patients who require closer follow-up and more aggressive early treatment.

SourceMayo Clinic·JournalJNCI Journal of the National Cancer Institute·DateNov 1, 1999

Duke study: Poured sand sifts, but showered sand doesn't

A Duke study reveals that the pressures under poured sandpiles are highest at their peripheries due to unbalanced distributions of stresses. In contrast, showered sand piles concentrate stresses at their centers like medieval cathedrals' flying buttresses. This research has practical importance for structures prone to self-destruction.

SourceDuke University·JournalPhysical Review E·DateNov 1, 1999

Traumatic brain injury hastens onset of Alzheimer's disease

A recent Mayo Clinic study found that traumatic brain injuries increase the risk of Alzheimer's Disease, with a median observed time from injury to onset of 10 years. The study suggests that traumatic brain injury interacts with other factors to hasten the onset of Alzheimer's in susceptible individuals.

SourceMayo Clinic·JournalAmerican Journal of Epidemiology·DateNov 1, 1999

Challenges of welfare reform

Researchers find substance use and dependence are significant problems among welfare recipients, but academic skill deficits are a greater barrier to self-sufficiency. Effective services addressing mental health needs and providing support for work barriers are crucial for successful fulfillment of family roles.