Embryonic patterning makes the feathers fly
...mber that enabled them to continually observe cell movements and track individual cells using fluorescent markers. The results were recorded in real time by time-lapse video microscopy. The resulting chicken feather movie resolved the question: the FGF/MAPK pathway acted through the mesenchyme. Analyses of ...First molecular simulation of a long DNA strand shows unexpected flexibility
...accounts for the role of water on average, but the movements of individual water molecules are not predicted, freeing computation capacity for simulation of whatever protein is being studied. Experiment cannot always probe atomic detail of living molecules because they are too small and often move too fast,...New research predicts US entry of H5N1 avian influenza
...r years." The findings showed that migratory bird movements were likely responsible for three introductions in...ic combination of poultry trade and migratory bird movements spread H5N1 much further than it would have gone by either of these pathways alone," said Dr. Kilpat...CU-Boulder space station experiments to involve K-12 students around the globe
...monitoring. population dynamics, physiology, daily movements and even gene activity, including possible genetic mutations caused by space radiation. "This is an exciting project for BioServe and a great opportunity to engage K-12 students in space research," Stodieck said of the payload, called "CSI" by the ...Proteins anchor memories in our brain
...are transmitted. That allowed him to ask what movements of AMPA receptors were likely to be responsible for making synapses stronger or weaker. The simulation's answer: The strength of a synapse and thus its ability to hold what we learn and remember changes when there is a change in the number of sc...Varied diet of early hominid casts doubt on extinction theory, says Colorado U study
...et variation in the teeth, the team speculated the movements of Paranthropus may have been based to some degree on rainfall-related food variability, including the onset of droughts which can cause individuals to consume foods not normally preferred. "We've never before been able to see dietary change withi...Why our shifty eyes don't drive us crazy
...orld appears to be moving around abnormally as eye movements are made....Two nerve cells in direct contact
...ly, this cell seems initially to react only to the movements in front of its own eye (ipsilateral), but remain blind to movements in front of the other eye (contralateral). However, if the ipsilateral movement stimuli are combined...First evidence to show elephants, like humans, apes and dolphins, recognize themselves in mirror
...ed their mirrored images by making repetitive body movements and using the mirror to inspect themselves, such as by moving their trunks to inspect the insides of their mouths, a part of the body they usually cannot see. Further, the animals did not react socially to their images, as many animals do, and did no......obvious," Panchuk said, "until you look at the eye movements of novice goaltenders, who scatter their gaze all ...his case making a save. To accurately track eye movements and gaze duration in a sport, Vickers' neuromuscular lab continues to pioneer both technology and re...Out of Africa: Scientists uncover history of honey bee
...ists that probed the origin of the species and the movements of introduced populations, including African "kill...bees in Africa than to each other." To explore the movements of bee populations, the researchers used simple variations in DNA called SNP (single nucleotide poly...News tips from the Journal of Neuroscience
... breathing and heart rate become unstable and hand movements abnormal. This severe neurological condition is caused by loss-of-function mutations in the gene formethyl-CpG-binding protein- (MeCP2). This week, Wang et al. explored one possible disease mechanism using mice lacking MeCP2. Previous work indicated...Electronic chip, interacting with the brain, modifies pathways for controlling movement
...tex, it produces long-lasting changes. Namely, the movements evoked from the recording site changed to resemble those evoked from the stimulation site. The researchers said that a likely explanation for these changes is the strengthening of pathways within the cortex from the recording to the stimulation site...Disappearing nest egg: Researcher studying declining numbers of macaws
...macaws and use satellite technology to track their movements and learn more about them. "We have some macaws here in captivity on campus at the Schubot Exotic Bird Center, but we have much to learn about them in their native habitat," he says. "We know that they tend to stay with one mate for a long time. But...New biologic treatment for tennis elbow may replace surgery for chronic sufferers
...on of the tendon above the elbow that controls the movements of the wrist and hand. Treatments such as rest, nonsteroidal anti-inflammatory drugs, bracing, physical therapy, and injections of corticosteroids (cortisone shots) are often used but recent studies have called into question their efficacy. Those w...Asia's odd-ball antelope gets collared
...them. "The GPS collars will provide information on movements of saigas across this dazzling but arid landscape so that a more comprehensive conservation strategy can be developed to assure the persistence of this little known species" said WCS research scientist Kim Berger, a co-director of the study.Saigas st...Metabolic disorder underlies Huntington's disease
...eneration leads to the uncontrollable "dance-like" movements characteristic of the fatal, genetic disorder. The findings may help to explain other symptoms of the disease, including weight loss, and could point to new avenues for therapy, according to the researchers. "Huntington's has been thought of primar...Study challenges belief that tree frogs depress metabolic rate after 'waxing' themselves
...rnal film of lipids is not physically disrupted by movements or other disturbance." Tree frogs characteristically go into a resting posture after wiping themselves, tucking their limbs tightly against or beneath their body and closing their eyes. The researchers found that this series of actions following "w...Spring in your step helps avert disastrous stumbles, scientists say
...ner and Daley determined that the stumbling birds' movements were consistent with a mass-spring model that treats the body as a mass balanced atop legs serving as springs. This springiness of the leg was concentrated at its distal end, near the ankle and foot, with only moderate effects seen at the knee and li......tify both the overall structure of the complex and movements within the complex on the microsecond time-scale, which is important because that time scale is relevant for fast-twitching muscles," he said. "But it's actually pretty hard to measure motion at the microsecond time scale using NMR."...