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Science News Archive 2004 - Page 20


Page 20 of 135

Gene exchange between species is aided by parasitism

Indiana University researchers found that genes can move from plant parasites to host plants, establishing parasitism as a medium for horizontal gene transfer. The discovery complements previous findings showing the opposite process, and suggests that plant parasitism has been a key mechanism of gene exchange between species.

SourceIndiana University·JournalNature·DateNov 10, 2004

Not the end, but beginning of the world as we know it

Researchers found that oxygen in the atmosphere appeared at least 100 million years before its supposed debut with the carbon cycle perturbation. The discovery suggests a complex process involving mantle plume volcanoes and cyanobacteria, leading to an increase in oxygen levels over millions of years.

News tips for Tuesday, November 9, 2004

Researchers found that testosterone therapy improves blood flow to the heart muscle in men with CAD, while behavioral factors such as exercise rates and obesity trends are closely monitored. Additionally, studies suggest 'flight socks' can reduce deep-vein leg clots during long air travel, offering a promising solution for at-risk indi...

'Outgrown' a peanut allergy? Eat more peanuts!

A study published in the Journal of Allergy and Clinical Immunology found that children who eat concentrated peanut products frequently have a lower chance of having their peanut allergy recur. The researchers recommend that these children maintain tolerance by consuming peanut products at least once a month.

SourceJohns Hopkins Medicine·JournalJournal of Allergy and Clinical Immunology·DateNov 9, 2004

New Royal Society journal studies

Researchers studied social implications of winner and loser effects in green swordtail fish, nocturnal colour vision in geckos, and bird distress calls. They also examined queen and worker policing in wasps and developed a model to minimize the impact of exotic infections.

SourceRoyal Society·JournalProceedings of the Royal Society of London·DateNov 9, 2004

Ancient marine invasion sheds light on diversity

Researchers found that an ancient marine invasion led to a significant increase in regional diversity, with gamma diversity rising by 26% due to changes in beta diversity. The study suggests that habitat distribution or increased habitat diversity may have contributed to this increase.

Doctors transplant ovary to woman's arm to preserve fertility

In a breakthrough procedure, doctors have successfully transplanted a healthy ovary from a patient's body into her upper arm, preserving her fertility. The innovative technique uses brachial vessels to establish blood supply and has shown promising results in maintaining cyclical follicular growth.

SourceWiley·JournalCancer·DateNov 8, 2004

International marine survey of coral death

Marine scientists aim to fill information gaps on coral reef ecosystems to strengthen global management and policy interventions. The assessment focuses on identifying sources of new marine pathogens, reducing inputs, and developing control measures.

SourceCornell University·JournalFrontiers in Ecology and the Environment·DateNov 8, 2004