Endangered frogs coexist with fungus once thought fatal
...nsis , a rainforest frog listed as endangered, can persist in the wild with stable infections of this fungus. To evaluate the effects of the fungus on frogs in their natural habitat, the authors focused on six species living in the high-elevation rainforest streams of Eungella National Park in Queensland, Au...Fungus knocks a frog down but not out, raising questions about amphibian declines
... frogs. "This shows that frog populations can persist with an endemic infection of the chytrid fungus," ... "Our records show that frogs with the fungus can persist for three years, but we don't know whether these frogs coexist with the fungus during that time, or ...Stanford cooling tool may improve performance of athletes, soldiers
...eases in strength people get when using the device persist after they stop using it. So, whatever physiological benefit you get, you keep. That's the beauty of it." ...T cell's memory may offer long-term immunity to leishmaniasis
...tral memory T cells but not the effector T cells persist in the absence of obvious parasites for as long as five months," Scott said. "Since we still do not know much about these new T cells, our next step is to find out how we can encourage the proliferation of central memory cells and stimulate them to ...Are museum collections of ancient life representative?
...ndy because they capture rare organisms that don't persist or preserve well in the environment. They are also helpful for studying a large number of a particular species, although collection of nicer, often larger, specimens can mean there are few examples of hard-to-see juveniles." Barbour Wood concludes th...... Maier suspects the microbes may persist in a state of suspended animation during the Atacama Desert's multi-decadal dry spells. So the team's next step is to return to Chile and do experiments on-site. One option is what Maier calls "making our own rainfall event" -- addi...Fragmented habitats no ultimate refuges for forest-dwelling tropical birds
...ted habitat and whether some surviving species can persist in such landscapes. Their study focused on Brazil's Atlantic Forest, which the authors estimate now has been reduced to 119,540 square kilometers, or about 10 percent of its original extent. "There are more species threatened with extinction in this ...JCI table of contents, December 1 2004
...ermine how long improvements in cognitive function persist after a single course of treatment and whether better or more long-lasting results can be achieved with either continuous treatment or successive courses of treatment. This study suggests that drugs, such as rolipram, the inhibit phosphodiesterase ha...Animal experiments more stressful than previously recognized
... and a spike in blood pressure. These symptoms can persist for up to an hour after each event. Immune response is also affected. In rats and mice, the growth of tumors is strongly influenced by how much the animals are handled. Dr. Balcombe's paper appears in the journal's current issue, Autumn 2004, availa...Selective predation and productivity jointly drive complex behavior in host-parasite systems
...lation, while in the latter case, parasites cannot persist with their hosts, even if they can invade. When predators less strongly prefer parasitized hosts, these dramatic behaviors diminish, but predators can still trigger large fluctuations of parasite abundance at higher productivity. Surprisingly, when ...Heterosis in populations in nature of a domesticated plant
...er plants are inbred. How does high heterozygosity persist despite their incorporation? The authors demonstrate a novel case of selection for heterozygosity that explains this paradox, showing that humans inadvertently favour heterozygous volunteers. When farmers weeded fields, they killed small volunteers,...Physiological effects of reduced gravity on bacteria
...s (such as radiation resistance and the ability to persist under very low nutrient conditions), may contribute to the success of these water system bacteria. Dr. Paul W. Baker is currently employed at BCR Diagnostics in Middletown RI after completing a post-doctoral position at Kent State. Dr. Laura G. Leff...Cure no quick fix for cancer survivors on long road to recovery
...and lasting emotional and physical impact that can persist for decades. In fact, many cancer survivors report lingering sleep and sexual problems, pain, cognitive problems and generally poor physical well-being relative to their healthy peers, said John Wingard, M.D., director of the blood and marrow transpl...Drug-resistant bacteria on poultry products differ by brand
...esults suggest that fluoroquinolone-resistance may persist in the food supply for a substantial period of time even after antibiotic use is discontinued," said Price. "Assuming that what we are observing are lingering resistant strains rather than the result of continued drug use, then one has to conclude th...Alcohol 'binges' in rats during early brain development cause circadian rhythm problems
... and that these defects in brain development often persist into adulthood. Unlike the craniofacial differences sometimes seen in FAS children (which may lessen into adolescence and adulthood), the impact of alcohol on brain function as the child grows is less measurable and knowledge of the timing and amou...PNAS highlights for the week of April 25-29
...important adaptive strategy that enables plants to persist during periods of stressful environmental conditions. Dormancy is induced by the short days and cold temperatures of winter. Isabel Allona and colleagues investigated the role of the chestnut's circadian clock genes in regulating this period of dorma...Prenatal cocaine exposure exerts subtle effects on schoolchildren
...lopmental outcome at 3 years of age. Those effects persist at ages 5 and 7, once more demands are placed on the children during the formal school years, according to related findings the researchers presented at the recent annual meeting of the Society for Research in Child Development. "We have found that a...Scientists track 'stealth' DNA elements in primate evolution
... are the actual mechanisms by which these elements persist and propagate over time to influence human evoluti...cated that at least some "master" Alu elements may persist in low-copy numbers for long periods of evolutionary time without retrotranspositional activity, sug...Changes in community size affect the outcome of competition
...not rely solely upon superior dispersal ability to persist with better competitors. Results can also help explain why biological invasions frequently occur in communities that have been degraded and fragmented by anthropogenic activities, because rapid reductions in the size of communities make it relatively...Bee mites suppress bee immunity, open door for viruses and bacteria
...me positive effect in this virus that allows it to persist in a colony." The combination of bee mite infestation and deformed wing virus does cause deformed wings in about a quarter of the emerging bees. This, however, does not lead to sudden hive collapse. Something else is involved that makes bee mites ...