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Science News for November 4, 2005


Quantum chaos

Scientists have found experimental evidence of quantum chaos in a system with freely dispersing components. The researchers replicated an historical experiment, demonstrating photoelectric effect and observing Ericson fluctuations.

SourceMax-Planck-Gesellschaft·JournalPhysical Review Letters·DateNov 4, 2005

HIV-infected adults in Botswana respond positively to ARV therapy public treatment program

The study found that more than 95% of HIV-infected people in resource-poor nations can benefit from combination ARV treatment, leading to improved CD4 counts, decreased viral load, and weight gain. The results underscore the importance of monitoring drug tolerability and toxicity to ensure patients' quality of life and adherence rates.

SourceHarvard T.H. Chan School of Public Health·JournalJAIDS Journal of Acquired Immune Deficiency Syndromes·DateNov 4, 2005

A sense of place

A new study examines how publicly funded organizations used information and communications technologies to shape regional identities and overcome social, economic, and political problems. The research reveals the widespread adoption of ICTs in 'place-making' projects across Europe.

SourceUniversity of Chicago Press Journals·JournalCurrent Anthropology·DateNov 4, 2005

Study broadens understanding of enzymes linked to tumor promoting molecule

Researchers have discovered that sphingosine kinases SphK1 and SphK2 have opposing roles in regulating ceramide biosynthesis, with SphK2 potentially sensitizing cancer cells to chemotherapy. This finding may lead to the development of more effective chemotherapeutic agents targeting specific sphingosine kinase without affecting others.

SourceVirginia Commonwealth University·JournalJournal of Biological Chemistry·DateNov 4, 2005

The 'spread of our species'

Researchers suggest that modern human expansion in South Asia was a complex process, with evidence indicating diversity of behavioral responses and competition driving the demise of indigenous archaic hominids. The study challenges the idea of a sudden 'revolution' in modern human behavior 50,000 years ago.

SourceUniversity of Chicago Press Journals·JournalCurrent Anthropology·DateNov 4, 2005

Reflecting on personal values offers protection from effects of stress, UCLA psychologists report

Researchers at UCLA found that reflecting on personal values can significantly lower cortisol levels after stressful events, providing a potential new method to combat stress. The study involved 80 undergraduates who underwent stressful tasks, with those reflecting on meaningful values showing reduced cortisol responses.

SourceUniversity of California - Los Angeles·JournalPsychological Science·DateNov 4, 2005