Climate change plus human pressure caused large mammal extinctions in late Pleistocene
...g in a major way today." Because climate change is occurring more rapidly today than even in the late Pleistocene, when the majority of megafauna went extinct, serious consequences for many large animal species that weathered the Pleistocene extinction could be just down the road, Barnosky said. And the impact...Tracing genes, biologists show lizard migration is traced to Florida
...seeing them so much." The genetic changes occurring in the Florida populations are happening at a much...or two is evolving from the genetic card shuffling occurring in Florida. "These lizards have become a grand experiment,' Kolbe said, referring to a long...Bullish chemical could repel yellow fever mosquitoes
BLOOMINGTON, Ind. -- A naturally occurring chemical that may repel yellow fever mosquitoes can now be made in the laboratory, Indiana University Bloomington scientists report. "The synthesis requires only seven steps," said organic chemist P. Andrew Evans, who led the research. "It should be ...New anti-inflammatory strategy for cancer therapy identified by UCSD researchers
...ted with inhibition of either one of two naturally occurring substances, a pro-inflammatory protein called nuclear factor-kappa B (NF-kB) or an inflammatory mediator called tumor necrosis factor alpha (TNFα). The result, published in the September 20, 2004 issue of the journal Cancer Cell, was increased ...Genetically modified bacterium as remedy for intestinal diseases
...stinal inflammations, such as Crohn's disease, are occurring with increasing frequency, striking young adults in particular. In an advanced stage of such inflammations, patients can eat only via catheters. Crohn's disease has been on the rise in recent years: it is estimated that in Western Europe 2 persons i...Byproduct of water-disinfection process found to be highly toxic
...ing the amount of previously identified toxic DBPs occurring in chlorine-treated water. "The iodoacids may...lorine-treated water, but only 17 percent of those occurring in chloramines-treated water, 28 percent in water treated with chlorine-dioxide, and just 8 percent ...Growth hormone and IBD: Reduction of intestinal inflammation, promotion of growth
...to impaired actions of growth hormone, a naturally occurring compound that normally acts to promote both growth and healing. About 10%, or 100,000 of the estimated 1 million Americans who suffer from IBD (either Crohn's Disease, or ulcerative colitis) are under 18, according to the Crohn's and Colitis Foundati...K-State's National Agricultural Biosecurity Center receives $1.3 Million from Department of Defense
...agrosecurity response efforts, including naturally occurring outbreaks of diseases of plants and production animals, and response exercise simulations. "We're going to be looking at the full spectrum of agrosecurity issues," Vanier said. "We will emphasize diseases identified by the government as zoonotic and...Viral suspect for amphibian decline traced to human spread through bait
...ulation declines and even waves of mass extinction occurring in Central America, throughout the Rocky Mountain region in North America, and in Australia. Collins's lab was particularly focused on the iridovirus, which was responsible for observed mass die-offs of tiger salamanders in isolated stock ponds in so...Computer scientists at UH developing 'nurturing' computers
...alth," Pavlidis said. "With typical health checks occurring at a doctor's office, where the environment is isolated and often static, one can make the argument that the value of such check ups is often limited. Chronic ailments, for instance, such as heartbeat irregularities, headaches and anxiety disorders,...Fossils reveal direct link between global warming and genetic diversity in wildlife
...ns of animals, "this study shows that gene flow is occurring when population sizes are low," Hadly said. "So the snapshot we have today about how populations are connected may not be how it actually persists through time." The study also has implications for wildlife managers in the greater Yellowstone ecosyst...Anti-cancer compound in vegetables found to block late-stage breast-cancer cell growth
...This is the first report to show how the naturally occurring plant chemical sulforaphane can block late stages of the cancer process by disrupting components of the cell called microtubules," said Singletary, a professor in the department of food science and human nutrition. "We were surprised and pleased to ...The future of HIV therapeutics is brightening, according to Gladstone Institutes Director
...st. In addition, fast-moving research of naturally occurring factors with potent antiviral properties is opening the way for future development of an entirely new class of anti-HIV drugs. New agents that block the first step in HIV's life cycle, the entry of the HIV virion (a single virus particle) into host C...Unicellular organisms contribute more nitrogen to ocean that reported earlier
...ome time." Carbon dioxide is one of the naturally occurring gases that traps energy from the sun and helps maintain hospitable temperatures on Earth, creating the "greenhouse effect." But studies indicate that greenhouse gases that form from vehicle and industrial emissions are enhancing the greenhouse effect...Study narrows search for genes placing men at increased risk for prostate cancer
...s. Sadly, prostate cancer remains the most common occurring malignancy in America - other than skin cancer, and we still know far too little about how to prevent it, detect it, and treat it."...Using statistics to decipher secrets of natural mutation
...f Washington in Seattle. "Understanding naturally occurring mutations has been of great interest because mutat...etter represent the complete spectrum of naturally occurring mutations. Mutations are of course also occurring in the genes and those are of interest because the...Stanford researcher's findings may shed light on common, deadly birth defect
...s believed that the initial rates are much higher, occurring about once in every 250 conceptions. Most fetuses are so severely affected that they are miscarried early in pregnancy. Symptoms range from death within days to severe mental retardation, seizures and an inability to speak. Others, however, suffer on...Rare mutations can significantly increase risk factor for heart disease
...ude the possibility that mutations in general were occurring more frequently in one group, the researchers also compared the frequency of non-synonymous sequence variations those that exist only at the DNA level and would not affect the protein. They found these to be similar in the groups with high and low H...Brain's reward circuitry revealed in procrastinating primates
...ch trial as the reward approached, with the fewest occurring during the rewarded trial. Previous studies had also traced the monkeys' ability to associate the visual cues with the reward to the rhinal cortex, which is rich in dopamine. There was also reason to suspect that the dopamine D2 receptor in this area......and animals as they collectively drive the changes occurring on this disturbed landscape. Other speakers in the session will address the status of plants in the area's old growth forests as well as the roles of insects, mammals, and birds in reconstructing the environment post-eruption. The dramatic transforma...