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Science News Archive April 2009 - Page 3


Page 3 of 24

Drugs needed to preserve eggs for reproduction need to be given in stages

Researchers developed a mathematical model predicting optimal time for loading and unloading cryoprotectants, which reduces egg size shifts and improves fertilization chances. Using sugars like trehalose, these staged drugs can help preserve eggs at subzero temperatures, enabling easier transportation and potential transplantation.

SourceMedical College of Georgia at Augusta University·JournalMolecular Reproduction and Development·DateApr 29, 2009

Tiny differences in our genes help shed light on the big picture of human history

Scientists have developed a new tool to identify big events in human history by examining tiny genetic differences. This research, published in the journal Genetics, confirms a major decline in European populations 32,500-47,500 years ago and helps pinpoint gene mutations linked to diseases such as cancer and heart disease.

Darwin in a test tube

Researchers at Scripps Research develop molecules that can evolve and compete for resources, demonstrating niche partitioning in coevolution. The study shows how different species adapt to specific food sources over time, a classic concept in Darwinian evolution.

SourceScripps Research Institute·JournalProceedings of the National Academy of Sciences·DateApr 29, 2009

Athletes with asthma need more help from their team trainers

A new study by Ohio State University finds that most NCAA athletic trainers are not following best practice standards for managing asthma among athletes. The research suggests that a majority of programs are not adhering to national guidelines, which emphasize education, management protocols, and medical professional involvement.

SourceOhio State University·JournalMedicine & Science in Sports & Exercise·DateApr 28, 2009

Native Americans descended from a single ancestral group, DNA study confirms

A DNA study confirms that Native Americans and Greenlanders share a common ancestral population, with the '9-repeat allele' present in all Native American populations and absent in other Asian groups. This evidence supports the single ancestral population theory, ruling out multiple mutations and natural selection hypotheses.

SourceUniversity of California - Davis·JournalMolecular Biology and Evolution·DateApr 28, 2009

Matrix protein key to fighting viruses

Researchers from Durham University have successfully mapped the high-resolution structure of the matrix protein, a critical component of enveloped viruses like RSV. This breakthrough could lead to the development of new biochemical tools to treat respiratory ailments and other viral infections.

SourceDurham University·JournalProceedings of the National Academy of Sciences·DateApr 28, 2009

Gene alterations associated with response to anthracycline therapy for breast cancer

Research found that women with tumors carrying TOP2A gene alterations had better outcomes when treated with anthracycline-based regimens, similar to those seen in HER2-positive tumors. The study suggests that TOP2A gene alteration is associated with increased benefit from anthracycline therapy.

SourceJournal of the National Cancer Institute·JournalJNCI Journal of the National Cancer Institute·DateApr 28, 2009

Unifying the animate and the inanimate designs of nature

Researchers at Duke University unify biological and geophysical principles of nature's design using the constructal law, which predicts flow systems' evolution to balance imperfections. This new perspective offers a powerful tool for understanding variation in both animate and inanimate nature.

SourceDuke University·JournalPhysics of Life Reviews·DateApr 28, 2009

WA discovery a key to blood cell development

Researchers have identified a key molecule called Liar that leads other molecules into the nucleus of blood cells, offering a potential treatment for cancer. A cellular enzyme known as Lyn has also been found to 'turn on' blood cell development, highlighting a new target for cancer therapy.

SourceResearch Australia·JournalBlood·DateApr 28, 2009