Mass extinction at the Triassic-Jurassic boundary
Who did it? Who pulled the trigger, or rather, what pulled the trigger at the Triassic-Jurassic boundary that wiped out 20% of all marine families in Earths oc...Northern Vietnam drinking water contains dangerous arsenic levels
...ntially hazardous arsenic levels in drinking water pulled from shallow wells in the country, he said The problem flows largely from "tubewells," which pull water from depths of between approximately 30 feet and 120 feet, according to the researchers. The wells, designed to provide safe drinking water by avo...New DNA-base vaccine approach protects mice against anthrax
... Once anthrax spores are inhaled, they are pulled deep into the lungs where they usually are consumed by macrophages - white cells that scavenge the body for pathogens and other components that may lead to disease. "Unf...Molecular motor packs DNA into viruses at greater than champagne pressures, researchers report
...time as they measure the resistance. At first they pulled too hard, stalling the motor and probably strippin...when the capsid is uncorked. At maximum, the motor pulled with about 57 to 60 picoNewtons of force. Scaled up to human dimensions, this would be enough to lif......permitting sustained wakefulness. Anyone whos ever pulled an all-nighter knows by the next morning that sleep is essential, and sleeps status as a behavior found in organisms ranging from fruit flies to frogs to humans underscores its importance as a biological process. But 50 years after the discovery of ...The ecological consequences of 'promiscuous' boating
...dy a total of 920 boaters were interviewed as they pulled their boats from the water at three popular public launches on Lake St. Clair, near Detroit, Michigan. The boaters were asked questions pertaining to the duration of their outing, the activities and devices they used for fishing, whether they droppe...Bone strength probed by scientists
...l properties which allow it to "bounce back" when pulled or stressed in laboratory experiments. The AFM operates by tapping and pulling with a tiny needle. "We learned that the collagen in bone contains sacrificial bonds that rupture as collagen is stretched, and then they reform or heal," said James B. T......ad pushed in toward the hip socket and one with it pulled away from the socket. Comparing the latter images lets clinicians determine how many millimeters of play exist between femur and socket. Penn remains the central repository for images collected using PennHIP, allowing for population studies far beyo...Science's Top Ten: nanoscale computing circuits named top scientific advance of 2001
... unequal burden of implementing emission controls, pulled the U.S. out of the Kyoto Protocol, designed to reduce human-produced greenhouse gases worldwide. Missing Sink Found: The United States is the world's top greenhouse gas producer, but it's also a "sink," mopping up lots of carbon dioxide from the a...Study shows plants inherit traits from more than gene sequence alone
...fied, they can be packaged, they can be pushed and pulled around and that alters how they are interpreted and how they are used," Stokes explained. The finding that these levels of epigenetic regulation can be inherited has added to a growing interest in this field, once considered only a side note t...'Wishful thinking' gene regulates neural development
...pupal case, but they couldn't get out -- and if he pulled them out, they had very spastic movements. This suggested to us that they had a neuronal defect of some sort but the animals' nerve cells appeared normal," said OConnor. Two of OConnors co-authors, Bing Zhang and Hong Bao of the University of Texas,...Still waters? 'Clear-cutting' robs the deep-sea of ancient treasures
...outhern Australia, 20 minutes of deep-sea trawling pulled in 60 tons of orange roughy in the 1980s. Today, stocks have been reduced to less than 20 percent of their prior abundance, Roberts reported. Similarly, deep-sea catches of pelagic armourhead (Pseudopentaceros wheeleri) have collapsed from 30,000 ton...'Summer of the Shark in 2001 more hype than fact, new numbers show
...g his nephew in the July 6 attack, Arbogasts uncle pulled the shark to shore, emergency medical personnel retrieved the arm out of the sharks throat. Surgeons later reattached the limb. It was a made-for-TV movie kind of incident one that clearly captured the imagination of the American public and certa...Optical tweezers show how DNA uncoils
...of DNA from a single nucleosome, he says: "When we pulled on an individual chromatin fiber with increasing force, low force initially released 76 base pairs of DNA per nucleosome, then higher forces yielded 80 more base pairs with the histones still bound to the DNA, followed by histone detachment at still ...Sea Grant news: Shipworms, ozone, hurricanes
... areas. Sea Grant researchers have already beaten, pulled and prodded 15 flood-damaged houses to test hurricane-resistant retrofits. The test houses, which ranged from brick ranches to wooden two-stories, were all damaged by Hurricane Floyd and slated for destruction in Horry County, North Carolina. Reinho...Disorder forces DNA molecules out of tight spaces
...ass through, some small part of the chain is first pulled into the opening, causing the rest to uncoil and f...ollow. In these experiments the DNA molecules are pulled into the dense array of pillars by an electric field. If the field is removed before a molecule is ...Molecular 'motor' drives rotavirus replication
...irus since the first vaccine against rotavirus was pulled from the market in late 1999, said Prasad, a professor in the department of biochemistry and molecular biology. Proteins similar to NSP2 exist in all kinds of double-stranded RNA viruses. They are perhaps the central piece around which the r...Just one bite at a time: Researchers find snake with unusual feeding habit
...t was important to verify how the crab is actually pulled apart. So, Jayne brought the snake into his laboratory and recorded Gerarda's feeding behavior using an infrared IR) camera. "They're kind of a bashful species," said Jayne. They wouldn't eat when I watched them, but when I used the IR camera I found...Dinosaur ancestor's vision possibly nocturnal
...ave had for its rhodopsin. "From the databases, we pulled rhodopsin gene sequences for such animals as dogs, rats, cows, birds, teleost fish, eels and amphibians. Then we aligned them," says Chang. "Using our knowledge of how these vertebrates are related to each other, the sequence alignment and a model of...Tiny, magnetic spheres may help overcome gene therapy hurdle
...e said. "They have to have enough iron oxide to be pulled by the magnetic field, and you have to make sure they have the right rate of degradation, whether its two hours or two weeks."...