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Science News for January 16, 2008


Weight gain induced by antipsychotic drugs can be avoided

A weight control program has been shown to reduce weight gain and improve cholesterol levels in patients taking antipsychotic medication. The study found that participants who engaged in regular physical activity and healthy eating experienced significant improvements in their lipid profile and body mass index.

SourceUniversité Laval·JournalAustralian & New Zealand Journal of Psychiatry·DateJan 16, 2008

Math models snowflakes

Mathematicians at UC Davis and University of Wisconsin-Madison develop program to model snowflake growth, revealing complex structures and rare patterns. The model generates a wide range of natural snowflake shapes, including novel forms like the 'butterflake', which could appear in nature but would be fragile.

Evolution of human genome's 'guardian' gives people unique protections from DNA damage

A recent study has found that human genes have evolved additional safeguards to boost the p53 regulatory network's ability to guard against DNA damage. This enhancement is thought to be linked to humans' increased need for coordinated control of molecular repair activities during DNA replication.

SourceCincinnati Children's Hospital Medical Center·JournalProceedings of the National Academy of Sciences·DateJan 16, 2008

New genus of self-destructive palm found in Madagascar

A gigantic palm has been discovered in Madagascar with an unusual and spectacular lifecycle, growing up to 18m high and dying after fruiting. Conservation efforts are underway to protect this critically endangered species, with the aim of disseminating it to botanic gardens and growers globally.

SourceWiley·JournalBotanical Journal of the Linnean Society·DateJan 16, 2008

Nutrition has slipped through the gap

The Lancet Series highlights the devastating impact of undernutrition on maternal and child health, with over a third of all child deaths attributed to this cause. Proven interventions like breastfeeding counselling, vitamin A supplementation, and zinc fortification can help address this issue.

SourceThe Lancet_DELETED·JournalThe Lancet·DateJan 16, 2008

USC researchers identify mechanism that controls activation of stem cells during hair regeneration

Researchers at USC have identified a novel signaling mechanism that coordinates stem cell activity and regulates hair regeneration in large populations of hairs in animal models. The study found that periodic expression of bone morphogenetic protein (Bmp) in the skin macro-environment is key to coordinated hair stem cell activation.

Sense of personal control influences Latinas' decisions about sexual debut

A sense of personal control over sexual behaviors significantly impacts Latina women's decisions on timing their first sexual intercourse. The study reveals a strong correlation between young Latina women's perceptions of family expectations and their own beliefs regarding the optimal age for sex initiation. This unique research contri...

SourceUniversity of Chicago Medical Center·JournalJournal of Adolescent Health·DateJan 16, 2008

Lighting up the powerful global smoking lobby

The tobacco industry has formed a global network of manufacturing associations to challenge local tobacco control measures and promote smoking. The International Committee on Smoking Issues (ICOSI) played a key role in this strategy, with documents revealing strategies to undermine public health efforts.

SourceBMC (BioMed Central)·JournalGlobalization and Health·DateJan 16, 2008

How does Fu-Zheng-Jie-Du-Decoction act on PTEN expression in hepatocellular carcinoma?

A study published in the World Journal of Gastroenterology found that Fu-Zheng-Jie-Du-Decoction increased PTEN expression in hepatocellular carcinoma, suggesting a promising future for TCM as a combined therapy. The decoction was shown to decrease tumor metastasis and improve survival rates compared to chemotherapy.

SourceWorld Journal of Gastroenterology·JournalWorld Journal of Gastroenterology·DateJan 16, 2008

Computer learns dogspeak

A computer program successfully identified and classified dog barks in different situations, achieving 43% accuracy in the first experiment. In a second test, the algorithm demonstrated a 52% success rate in recognizing individual dogs based on their unique bark patterns.

SourceSpringer·JournalAnimal Cognition·DateJan 16, 2008

Researchers put the bite on mosquitoes

Researchers at the University of Arizona have discovered a complex metabolic pathway in mosquito species, which they aim to disrupt with a harmless molecule. This could lead to an insecticide that kills both mosquitoes and their eggs, slowing the spread of diseases like malaria and yellow fever.

SourceUniversity of Arizona·JournalProceedings of the National Academy of Sciences·DateJan 16, 2008