Neuronal excitability may hold key to age-related decline in learning and memory
...of synaptic plasticity in other words, these mice appear to change some kinds of inter-neuronal connections more readily than do normal mice of the same age. Furthermore, the aged mutant mice out-performed their age-matched wild-type littermates in the spatial version of the Morris water maze, a laboratory...Head movements by warblers could reveal basis for birds' geomagnetic sense
...addition, birds experiencing a zero magnetic field appear to more diligently search for the non-existing reference direction by tripling their head-scanning. The findings of Mouritsen et al. confirm that the magnetic sensory organ must be located in the birds' head, and the fact that head-scanning f...OneWorld Health named business leader in public health on '2004 Scientific American 50'
...st in need." The 2004 Scientific American 50 will appear in Scientific American's December issue, available at newsstands on Nov. 23. Editor-In-Chief John Rennie described his magazine's commitment saying, "Scientific American believes strongly that the best hope for a safer, healthier, more prosperous wo...Genetic variant linked to weakened heart pumping
...e have always been intrigued by heart patients who appear to have very similar clinical characteristics but markedly different outcomes," Donahue said. "We thought genetics might play an important role. We hypothesized that the PPAR variant, since it plays a key role in regulating metabolism, might make hea...Drug may hinder recovery from heart attacks
...t the molecular and cellular levels. The work will appear in the November 23 issue of Molecular Membrane Biology. Co-researchers included Patricio Morgan, a postdoctoral research fellow in the Casey Research Group, and Claudiu Supuran, of the University of Florence, Dipartimento di Chimica, Laboratorio di C...Declining fish supply linked to wildlife consumption in West Africa, Science study reports
...ture on land, a new study suggests. These findings appear in the 12 November 2004 issue of the journal Science , published by AAAS, the nonprofit science society. The authors call for improved fisheries management from local nations and from the European Union in order to protect biodiversity and promote b...Sperm enzyme is essential for male fertility, study shows
...e National Academy of Sciences. A report also will appear Nov. 23 in the journal's print edition. Collaborating with UNC were scientists from the U.S. National Institute of Environmental Health Sciences (NIEHS); Fudan University in Shanghai, China; and the U.S. Environmental Protection Agency. Sperm motilit...Sex versus survival: A tradeoff at geographical range limits
...s survival. Hence, plants growing in cold climates appear to have made an evolutionary "tradeoff" between se...ng viewed these so-called vestigial traits which appear to have degenerated under conditions where they no longer enhance reproductive fitness as the flip...Community living causes bacteria to diversify
...ganisms from adverse conditions. The findings will appear the week of Nov. 15 in the Proceedings of the National Academy of Sciences. In the past few years, researchers have found that bacteria living in biofilms are responsible for many chronic human infections such as cystic fibrosis lung infections, hear...Delays in cutting greenhouse gasses could harm environment
... enough to severely damage many coral reefs, which appear to be sensitive to small temperature increases. Higher targets could cause warming beyond 2.5 degrees, which could affect many more ecosystems as well as the global ocean currents and ice sheets. "The bottom line is that people and their governments ...JCI table of contents, November 15 2004
...ld true but the pores of this filtration structure appear to be more irregularly shaped that previously prop...ructure. Indeed, the fibers that constitute the SD appear to be formed largely by the association of extracellular nephrin strands. The authors examined a Fin...Study identifies molecular complex vital to creation of miRNAs
...ns only a few years ago. Viewed most broadly, they appear to play significant roles in controlling gene expr...cleotides in length, but powerful. These molecules appear to work by binding to complementary regions in messenger RNA, responsible for translating genes into...Endurance running may be key to evolution of human body form
...nd Sciences. "What these features and fossil facts appear to be telling us is that running evolved in order for our direct ancestors to compete with other carnivores for access to the protein needed to grow the big brains that we enjoy today." Protein and fat derived from prey are excellent food for grow...A puzzle posed by black-headed ducks yields to persistent biologists
...ing to build up their nests. Both species of coots appear to be able to recognize and reject duck eggs when ...e nests of other species. Thus, black-headed ducks appear to be specialist brood parasites, relying on the two coots to eke out a living, Eadie said. Obligat...Gene expression profiling aids in ovarian cancer prognosis
...ard Medical School. "Because symptoms often do not appear until the disease has already spread to the upper abdomen, this malignancy is usually not diagnosed until it has reached an advanced stage." At that point, he adds, doctors typically use clinical data such as the amount of residual disease remaining...Tips from the Journals of the American Society for Microbiology
...sausages say Canadian researchers. Their findings appear in the November 2004 issue of the journal Applied ...y researchers from TheNetherlands. Their findings appear in the November issue of the journalApplied and Environmental Microbiology. Steel implants and pins ...Random gene activation helps ulcer bug escape immune system
...dings of the National Academy of Sciences. It will appear in print in the journal on November 30. Researcher... studied," Berg says. Given that the strain didn't appear to produce BabA protein, the bacteria should have been unable to get a grip on the Lewis B receptor....Heart responds to fasting by remodeling vital energy-producing components
...ns: the cells' power generators, the mitochondria, appear to remodel and consume extra internal walls or mem...ds for the cell, making the mitochondrial strategy appear to create more problems than it might solve. Nevertheless, the response appears to help maintain hea...Invasive sea squirt alive and well on Georges Bank
...winter flounder collected in the area, but did not appear to be digested. Samples of the tunicate will be evaluated to determine its nutritional value to predators, and to confirm the species through DNA analysis. The tunicate can spread by reproducing either sexually or asexually by budding. The free-swi...Low-carb diet during pregnancy improved triglycerides, fat metabolism in offspring
...c lipid metabolism in female adult offspring" will appear as one of 20 research studies on fetal programming (how a mother's actions affect her offspring) presented in the January 2005 edition of the American Journal of Physiology Regulatory, Integrative, and Comparative Physiology . The authors of the ...