Tag: "ago" at biology news

New push for public health, AIDS spending at African Union summit

...on that President George W Bush promised two years ago for the fight against AIDS. ...

Molecular biology fills gaps in knowledge of bat evolution

...location - originated about 52 to 50 million years ago during a lush period of significant global warming in a region that is now North America. This latest research helps fill gaps in the evolutionary history of one of the most diverse group of mammals on earth and the only mammals capable of powered f...

Genes In The Interferon System Important In Systemic Lupus Erythematosus

...," says ProfessorAnn-Christine Syvänen.A few years ago Lars Rönnblom and Professor Gunnar Alm at the SwedishUniversity of Agricultural Sciences were virtually the only researcherswho claimed that the interferon system, which is involved in the body'sdefense against viruses, etc., was also behind the auto...

Elusive HIV shape change revealed; Key clue to how virus infects cells

...tor and changes its shape was solved several years ago by another group. Harrison and Chen have now described gp120's structure before the shape change, yielding vital before-and-after information on how the molecule rearranges itself when it encounters the CD4 receptor. "Knowing how gp120 changes shape...

Antarctic ice shelf retreats happened before

... Shelf. The results revealed that about 9500 years ago the ice shelf retreated, allowing the sea to flood into the lake. The ice shelf didn't reform until 1500 years later, and has been present ever since. The findings are particularly relevant for other studies on the West Antarctic Ice Sheet where sci...

Live Recombinant Adenovirus Vaccine Technique Explored

...itary developed oral vaccines for adenovirus years ago that safely provide immunity in one dose. We wanted to see if we could combine the safe and easy-to-use qualities of live adenovirus vaccine with the versatility of recombinant adenovirus virus vaccines that are being developed.?/p> Specifically,...

The secret lives of whales

...irst zombie worms were described only a few months ago from one whale skeleton off California, Craig and co-workers have just found another species off Sweden and now think these zombie worms may occur worldwide. Because of their ability to break down lipids in cold water, these animals and their bacter...

New Clues Add 40,000 Years to Age of Human Species

...sediments,?he adds. The results revealed how long ago the eruption occurred: roughly 196,000 years. "This provided an unambiguous maximum age for the fossils,?says McDougall. Further supporting the dates, the researchers linked sediments deposited by the Omo River to periodic, well-dated sapropels ?l...

Study shows nanoshells ideal as chemical nanosensors

...vity. While it was discovered almost three decades ago thatroughened metallic surfaces could enhance Raman scattering signals byfactors of 1 million, this "surface-enhancement" effect has beendifficult to control, predict, and reproduce for practical sensingapplications. Now, Rice researchers have shown ...

Highly adaptable genome in gut bacterium key to intestinal health

...enome sequence of B. theta was generated two years ago in the same laboratory. The researchers inoculated germ-free mice, who have no intestinal bacteria, with B. theta. The mice were fed a diet high in complex carbohydrates and low in simple sugars. Ten days later, the activity of all genes in the bact...

Development of portable infectious disease detector

...impact on the drug discovery process.Fifteen years ago a number of start-up companies were created to makethe goal of creating a "lab-on-a-chip" a reality. However, puttingmicroscopic arrays of channels, pumps and valves to move around minuteamounts of liquid on silicon chips proved to be considerably mo...

New research indicates a 'troubled' greenhouse is brewing

... well-known greenhouse event some 55 million years ago during the late Paleocene epoch. Retallack explored the relationship between seasonality and rainfall in soils, then applied the same techniques to buried soils spanning the ancient greenhouse event. "This is known to have been a time of high atmosp...

Falling ants glide back to trunk to avoid dangers of forest floor

...anama, but it was at that moment in Peru 18 months ago that I realized why they do it: They're trying to get back to the tree, they're trying to not get lost in the understory of the forest," he said. Once they hit the forest floor, he added, they're unlikely to find a chemical trail back to the nest, an...

Family trees of ancient bacteria reveal evolutionary moves

...xygen factory in plant cells. A half billion years ago Cyanobacteria predated more complex organisms like...rd. Cyanobacteria emerging some two billion years ago were becoming complex microbes that had larger cell diameters than earlier groups ?at least 2.5 micr...

Scientists find fossil proof of Egypt's ancient climate

...ic evidence suggests that 100,000 to 400,000 years ago was a critical time in the evolution and dispersal of African hominins. Our climate data from this 130,000-year-old humid event suggest that this would have been a particularly good time for a northward migration through Africa following reliable wat...

Mayo Clinic Researchers Create 'Obedient Virus'; First Step To Use Measles Virus Against Cancer

...irus became the focus of this vision several years ago when the surprising finding was made that the measles strain used internationally for vaccinations has natural anticancer activity. "But we had a concern that the measles virus may be a little too promiscuous in its ability to infect both cancer cel...

Artifical cornea lets woman blind 20 years see

...ation robbed Elma Phifer of her vision two decades ago when she was 39. The reaction scarred her corneas and reduced the ability of her eyes to soothe their damaged surfaces by remaining moist. She came to rely upon family and friends to help her do many of the activities people with normal vision somet...

Supercomputer Dedicated To Bioengineering, Computational Biology Installed

... a stunning degree of performance that a few years ago simply couldn't be found in a small room in the basement of a bioengineering building." The cluster's management tool is called Rocks, an award winning toolkit developed at UCSD by a team led by Philip Papadopoulos, director of the Advanced CyberInf...

Light therapy may combat fungal infections, new evidence suggests

...se light-sensing genes more than 400 million years ago may have had major significance for fungal colonization of land, at a time when UV irradiation was particularly intense. ...

Rare surgery performed to remove pancreas, prevent diabetes

...tewart's chronic pancreatitis developed four years ago as the result of a congenitally malformed pancreat... been done previously; the first case was 16 years ago at the University of Minnesota, and the patient still survives. Only a few other cases were attempte...

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