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Tag: "comes" at biology news

Common enzyme is a key player in DNA repair

...y of proteins known as translesion DNA polymerases comes to the rescue. They cannot actually repair a damaged strand of DNA, but they can smooth over the problem by inserting a nucleotide opposite the damaged partner, so the DNA replication machinery can finish duplicating the chromosome despite the damage...

Molecule by molecule, new assay shows real-time gene activity

...he molecular machinery involved in gene expression comes from experiments done in vitro, rather than in living cells. Finally, the low sensitivity of current techniques for detecting gene expression has restricted analysis to highly expressed genes. Xie's new assay addresses all three limitations. He and ...

Ethiopian development raises birth rate

... food and other resources are already scarce, this comes at the cost of an increase in childhood malnutrition. Dr Gibson said: "This study is, to our knowledge, the first to demonstrate a link between a technological development intervention and an increase in both birth rate and childhood malnutrition. ...

Study finds evolution doesn't always favor bigger animals

...s have long believed that bigger is better when it comes to body size, since many lineages of animals, from horses to dinosaurs, have evolved into larger species over time. But a study published this week by two biologists at the University of California, San Diego in an early online edition of the Proce...

Newly discovered protein kills anthrax bacteria by exploding their cell walls

...lifornia that will germinate any anthrax spores it comes in contact with. As the spores germinate, the PlyPH protein will kill them, usually in a matter of minutes. The combined solution could be used in buildings, on transportation equipment, on clothing, even on skin, providing a safe, easy way to fight ...

High-tech tags on marine animals yield valuable data for biologists and oceanographers

...dive are transmitted to satellites when the animal comes to the surface to breathe. Costa's group has been providing water temperature and salinity data gathered by California sea lions to physical oceanographer Yi Chao at the Jet Propulsion Laboratory in Pasadena. Chao and his colleagues are incorporati...

World faces challenge as life expectancies lengthen, scientist says

...ished track record of being very difficult when it comes to making things available to those who can't pay ... position that we should implement everything that comes along," Tuljapurkar said. "However, we are now approaching a stage where it's necessary to look the ...

Ernst Mayr's theory illustrated in genetic epidemiology studies

...ion into play ?that's where the genetic revolution comes from." Templeton spoke Feb. 18 at the annual meeting of the American Association for the Advancement science, held Feb. 16-20 in St. Louis. He dedicated his talk to the late Ernst Mayr and the late Hampton Carson, another famed biologist who was...

There's something fishy about human brain evolution

... past 20 years he's been swimming upstream when it comes to convincing anthropologists of his position, especially that initial hominid brain expansion happened by chance rather than adaptation. But, he says, the evidence of the importance of key shoreline nutrients to brain development is still with us ...

Screening blood for West Nile virus

... (In an ideal world, cost would not matter when it comes to protecting human life and health, but in reality there is limited money available for public health measures. Studies such as this one are therefore essential to help politicians decide how to spend their budget wisely.) The analysis, published i...

Common bacteria pirate natural mechanism to get inside cells

...our finger in it," he says. "The protein, dynamin, comes along and forms a necklace around the neck of that balloon, then chops it off," he says of the process that is ongoing with millions of receptors on the cell surface. "Adding nitric oxide to dynamin changes it from an inactive protein inside the cel...

Microbiology text tells stories, offers online resources

...robiology textbook aimed at undergraduate students comes with not one, but two online resources. Written by eminent scientists with practical teaching, textbook writing and research experience, Microbe, will engage students in the learning process with its clear, reader-friendly style and a unique perspe...

Marsupial genome reveals insights into mammalian evolution

...lov. "Interest in marsupial and monotreme genomes comes from their important positions in vertebrate evolution," says Belov. (Monotremes are egg-laying mammals, represented today by only the platypus and echidna.) "Comparing genes of placental mammals, such as the human and the mouse, is not very effici...

Picking particles faster than one at a time

...a meter) to the nanoscale (billionths of a meter), comes ever closer to reality. ...

Scientist measures role of science's coolest player: The snow

... just a what-if question," says Vavrus, whose work comes amidst mounting reports on the steady melt of Arctic ice. "I wanted to quantify the influence of global snow cover on the present-day climate because that has relevance for the type of climate changes we are expecting in the future." Vavrus will dis...

A salty tale: New bacterial genome sequenced from ancient salterns

...ration outside. That's where evolutionary strategy comes in. Analyzing the bacterium's genome, researchers found that S. ruber's proteins are typically rich in acidic amino acids and relatively poor in hydrophobic (water-repellent) amino acids, making them soluble and highly stable at such salt concentra...

Making medicine 'smarter'

... National Institutes of Health Career Award, which comes with $695,000 in research funding. With the money, she will lead a five-year project to give doctors a new tool to better diagnose breast cancer. The aggressive disease claims the lives of more than 40,000 American women each year -- so a diagnostic ...

GROWing the next generation of water recycling plants

...ce does not need to be of drinkable quality yet it comes from the same pure source as our kitchen taps. Using GROW, much of the water that enters a building can be used twice before being placed into the national wastewater management system. "We had to carefully choose which semi-aquatic plants to use. O...

How the neuron sprouts its branches

... in a highly preferential way," he said. "As cargo comes out of the Golgi, it does not go randomly to the cell surface." Ehlers and his colleagues also found that the Golgi outposts appeared to locate themselves at dendritic branch points. "This finding is important because a fundamental problem that neur...

Amazon trees much older than assumed, raising questions on global climate impact of region

...opical forests are old. Really old, in fact, which comes as a surprise to a team of American and Brazilian researchers studying tree growth in the world's largest tropical region. Using radiocarbon dating methods, the team, which includes UC Irvine's Susan Trumbore, found that up to half of all trees grea...

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