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Researchers at the National Institute of Allergy and Infectious Diseases (NIAID) have located two genes that give hepatitis A virus (HAV) its virulent properties. The team, led by Suzanne Emerson, Ph.D., also has discovered that deliberately weakened HAV can quickly revert to its naturally occurring, infection-causing form. To be published in the September 1 issue of Journal of Virology, and appearing online this week, these findings indicate that making an improved vaccine for HAV will be a very dif
Birds may have a basic understanding of physics, recent research by Oxford zoologists suggests. In an article to be published in Science this week [Thursday], the researchers report the findings of an experiment in which New Caledonian crows bent wires to make hooks appropriate to retrieve food from a cylinder. This is the first time any animal has been found to show some understanding of cause and effect, and to make a new tool for a specific task.
The experiment built on a chance observat
Since the early 1980s, ocean phytoplankton concentrations that drive the marine food chain have declined substantially in many areas of open water in Northern oceans, according to a comparison of two datasets taken from satellites. At the same time, phytoplankton levels in open water areas near the equator have increased significantly. Since phytoplankton are especially concentrated in the North, the study found an overall annual decrease in phytoplankton globally.
The authors of the study,
Amazingly Sharp VLT Image of Lunar Landscape
Thirty-three years after the first manned landing on the Moon, the ESO Very Large Telescope (VLT) has obtained what may be the sharpest image of the lunar surface ever recorded from the ground. It was made with the NAOS-CONICA (NACO) adaptive optics camera mounted on the ESO VLT 8.2-m YEPUN telescope at the Paranal Observatory.
The photo (ESO PR Photo 19a/02) shows an area about 700 km from the Apollo XI landing site. The location
DuPont scientist identifies key issues in future coatings technology
Dr. Robert R. Matheson, Jr., one of the world’s foremost scientists on coatings – one of the oldest technologies known to humans – will have his scientific paper “20th- to 21st-Century Technological Challenges in Soft Coatings” featured in the upcoming edition of SCIENCE magazine.
As part of the Aug. 9 edition of SCIENCE, Dr. Matheson, a DuPont senior scientist, details the future of technological adva
An enormous source of clean energy is available to us. We see it almost every day. It’s just a matter of harnessing it.
The problem with solar energy is that it has not been inexpensive enough in the past. David Kelley, professor of chemistry at Kansas State University, developed a new type of nanoparticle — a tiny chemical compound far too small to be seen with the naked eye — that may reap big dividends in solar power.
Kelley’s team is studying the properties and tech