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Tag: "gold" at biology news

Researchers find 24 species believed new to science in Suriname rainforest

...sh, Harttiella crassicauda, feared extinct because gold mining activities had contaminated a creek where it was last seen more than 50 years ago. Overall, the survey recorded 467 species at the two sites, including large cats such as panther and puma, various monkeys, and a range of reptiles, amphibian...

Brightening prospects of using fluorescent nanotubes in medical applications

...nning. Jansen has been pursuing research that uses gold nanoclusters to burn away cancer cells. He has developed a selective method for attaching the gold clusters to the surface of tumors and then exposing them to wavelengths of light that cause them to ...

Massive herds of animals found to still exist in Southern Sudan

...0 kob in Southern Sudan,” said Fay. “If you were a gold miner and hit a vein of gold, like we found in kob, you would have found El Dorado. Never in my wildest dreams could I have imagined that this kind of abundance in nature existed in a region after 25 years of civil war, virtually unknown to the world...

DOE JGI sets 'gold standard' for metagenomic data analysis

...all has been issued for methods to separate fool's gold from the real nuggets. Such a gold standard has now been provided through work led by the U.S. Department of Energy Joint Genome Instit...

DNA-damage test could aid drug development

... to extend the technique to humans. Humans are the gold standard in that one wants an assay that directly predicts toxicity in humans, not animals, and you could obtain human bone marrow that's left over from medical procedures." "If you could change the micronucleus assay to have a human cell readout,...

Iowa State scientists demonstrate first use of nanotechnology to enter plant cells

...he particle surface. They synthesized even smaller gold particles to cap the nanoparticles. These "golden gates" not only prevented chemical leakage, but also added weight to the nanoparticles, enabling their delivery into the plant cell with the standard gene gun. The biologists successfully used the...

Study warns deep-sea mining may pose serious threat to fragile marine ecosystems

...rst commercial undersea exploration for high-grade gold and copper. They are targeting an area known as the Manus backarc basin off the coast of Papua New Guinea. The active hydrothermal vents in these areas occur where new oceanic crust is formed through undersea volcanic activity. Until the late 1970s, ...

Leukemia drug turns mini-molecules up, cancer genes down

...rans-retinoic acid (ATRA) and it is considered the gold standard for treating the disease. The study showed that ATRA raises the levels of three particular miRNAs in leukemia cells and that this rise coincides with a fall in activity of two important cancer-causing genes. The three are identified as m...

Woman's Day and For Womens of Science

.... The uncontrolled use of mercury in small-scale gold mining is contaminating thousands of sites around the world, posing long-term health risks to an estimated 50 million inhabitants of mining regions. These activities alone contribute more than 10 percent of the mercury in Earth's atmosphere attributa...

Mercury contamination of fish warrants worldwide public warning

.... The uncontrolled use of mercury in small-scale gold mining is contaminating thousands of sites around the world, posing long-term health risks to an estimated 50 million inhabitants of mining regions. These activities alone contribute more than 10 percent of the mercury in Earth's atmosphere attributa...

Rapid, Low-Cost DNA Testing

...rent affinities for attaching to ionically charged gold nanoparticles. Because ions have electric charges,... adsorbs on negatively charged citrate ions on the gold nanoparticles while double-stranded DNA does not. Given that both single-stranded and double-strande...

Researchers create artificial enzyme that mimics the body's internal engine

...aching the model to a liquid crystalline film on a gold electrode, which provided a nonstop supply of electrons to the model as it transformed oxygen molecules into water-a process called steady turnover. "The biochemists that study the enzyme typically study single turnover," Collman said. "They let t...

Recently discovered species gain protection

...dangered species hangs on in an area devastated by gold mining in the early 20th Century and subsequently by broad scale deforestation for pasturelands. Only 370 acres of the bird's habitat previously had been in any way protected, but even this limited sanctuary is at risk from timber extraction clearing...

Newly discovered fish named after New York aquarium biologist

...here else on earth. The newly described black and gold cichlid is about five inches long, and known locally as a "garaka." It occurs in several river system in the northeastern part of the country. Loiselle himself has discovered ?? fifteen freshwater fishes during his fourteen years of field work in...

Mechanical 'artificial hearts' can remove need for heart transplant by returning heart to normal

...Donor heart transplant has for many years been the gold standard in the treatment of those with severe heart failure. It has proven greatly successful but is not without its shortcomings ?particularly the shortage of donor hearts and the risk of organ rejection. "This therapy has the potential to ease...

Gold nanoparticles prove to be hot stuff

...the JILA team demonstrated that 100-nanometer-wide gold beads, as expected because of their metallic natur...ar size. However, the scientists also found that gold absorbs light and heats up quickly, by a remarkable 266 degrees (Celsius) per watt of laser power, a...

Uncovering DNA's 'sweet' secret

...t through these other sugars. Maybe it just hit on gold (these five-carbonsugars) very early and took off from there." ...

Fast test for low blood flow in dogs detects early heart trouble

...with an existing test that is considered to be the gold standard and relies on muscle absorption of microscopic beads in the heart muscle. Six dogs had surgery to place a clamp around a main artery, cutting in half the blood flow to the heart. After surgery, the dogs were injected with the drug adeno...

Scientists design simple dipstick test for cocaine, other drugs

...ifference in size between dispersed and aggregated gold nanostructures," Lu said. "This provides critical ...ed molecules that are present, freeing some of the gold nanoparticles. The red-colored nanoparticles then migrate along the membrane, where they are capture...

From hot springs to rice farms, scientists reveal new insights into the secret lives of archaea

...rs old that were collected from a deep underground gold mine in Ontario, Canada. Ventura and his colleague...with hydrothermal vents that eventually produced a gold deposit in what is now modern Ontario. In another AGU presentation, Roger Summons of the Massachu...

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