How a little bit of cold can kill a big manatee, and what it might mean for the species
...ators can deal with the overall syndrome, which is physically far-reaching and can last for months. The study comes at a critical time when the Florida Fish and Wildlife Conservation Commission is discussing whether to down-list the Florida manatee classification with the state government from endangered to th......s be useful when it's not practical or possible to physically send in physicians, such as in military operations, natural or bioterrorist disasters, at sea, or in other remote or underserved locations."...Distinctive advantages give optical sensors the edge over conventional systems
...are and aerospace sectors. Optical systems require physically smaller media for representing information than is required by magnetic or electronic systems. This requirement gives them an edge over conventional devices. The greater bandwidth of optics enables delivery of more data, which is useful for high-spee...Researchers one step closer to Holy Grail of neurobiology
...uman will be more sensitive to sensory stimuli, be physically more active; and react more emotionally. According...ehavioral concept into a set of responses measured physically and quantitatively." From responses to stimuli and the running wheel experiments, Pfaff and his coll...Scientists: Cloak of human proteins gets HIV into cells
...is." Even if a vaccine against the viral proteins physically blocks a retrovirus's primary way of infecting cells, the retrovirus's ability to enter new cells by way of its cover of human proteins -- the Trojan horse -- provides previously unrecognized ways to escape the vaccine's effects, says Stephen Gould, ...Study provides new insights into emerging theory of gene regulation
... the DNA, and that location only, to make the gene physically accessible for transcription. Histone proteins play a key role in this process. Histones are relatively small proteins around which DNA is coiled to create structures called nucleosomes. Compact strings of nucleosomes, then, form into chromatin, a su...Discovery may be first plant cell surface molecule that halts cell proliferation
... operate here. One is that the switches are simply physically linked. Or it could be that the 'off' switch and the 'on' switch are each regulated by external signals. They agree, however, that either scenario is extremely exciting. "I think this opens up a new paradigm that may not be specific or unique to the ...Bones from French cave show Neanderthals, Cro-Magnon hunted same prey
...posed by some scientists that Cro-Magnon, who were physically similar to modern man, supplanted Neanderthals because they were more skilled hunters as a result of some evolutionary physical or mental advantage. "This study suggests Cro-Magnon were not superior in getting food from the landscape," said lead au...Harvard Medical School launches new department to study human biology at the level of whole systems
...he HMS home Quadrangle, the new department will be physically adjacent to the Department of Neurobiology, which is also launching a parallel program in systems neuroscience. It is anticipated that the two departments will be recruiting some positions jointly. "To realize the goal of systems biology, you need to...Salmonella uses molecular staples to change structure of infected cells
...vides the first detailed insight into how bacteria physically manipulate host cells at the onset of an attack. The findings may help scientists develop a more general understanding of similar strategies used by a diverse array of deadly bacteria and lead to improved drugs for fighting them. Collaborating with ...Lifestyle changes clinically effective
...se that could be used to motivate women to be more physically active," she added. Dietary Fat and Carbohydrates: Role in Prevention of Prostate Cancer Progression and TRAMP Mice (Abstract 1217) Previous studies have suggested a link between the amount of saturated fat in the diet and the risk of progression t...Calcium channels control coronary artery relaxation
...solated the potassium channel, they found it to be physically associated with the T-channel. A great many puzzles remain concerning how the T-channel functions in coronary artery relaxation, said Campbell. One puzzle arises from the scientists' finding that an artery-relaxing drug, called sodium nitroprusside, ...Even more 'couch potatoes' in Brazil than in the United Statesbut theyre starting to move
... leisure time. Taking into account persons who are physically active in their jobs, such as in agriculture and c...l as increases in the proportion of people who are physically active. The program has spread to other states of Brazil, and similar programs have been established...New advances in thrombosis help further understanding of disease prevention
...affect birth outcomes. "Loss of pregnancy is a physically and emotionally challenging ordeal. When pregnancy loss is repetitive, these feelings are magnified," explains Benjamin Brenner, M.D., of the Rambam Medical Center, Haifa, Israel, lead investigator of the study. "Results from this study may give ho...Researchers find key gene in production of egg and sperm
...homolog, that comes from the other parent and must physically pair with it. The purpose of this behavior is to facilitate sorting of chromosomes into gametes so that only one chromosome from each pair is transmitted to a gamete." After pairing, protein machines move in to zip them together. Finally, in a proce...New insight into control of parental gene expression in eggs
... genes during egg or sperm development. Imprinting physically marks genes in such a way that the parental origin of the two copies can be distinguished so that one parent's copy is turned on while the other is silenced. Imprinted genes are the likely reason that maternal and paternal contributions are necessary...Out-of-balance ecosystems play role in demise of amphibian populations
...fine the data on parasitic activity and argue that physically and chemically induced changes of aquatic habitats are taking a toll. "We have to be asking what human activities are contributing to imbalances in these ecosystems to set the stage for more severe infections," Beasley said. "It's becoming a serious ...Undergraduate research experience advances education
...gs I didn't expect to be doing. "I spent more time physically trying something before working out calculations," she says. "I was constantly changing things as I found new problems and new ways of looking at a problem. It was very hands on. You are under real pressure, but you have to keep working. The first da...Is a single bout of exercise helpful or harmful in getting a good night's sleep?
...ered to participate in the study. Volunteers were physically active (i.e., they participated in recreational sports or their jobs required some physical labor), but they were not engaged in a regular training program. The volunteer's characteristics (all values throughout are means + standard deviations) were...Two molecules work together to aid transport of immune cells, UT Southwestern researchers find
...e CD44 and VLA-4 receptors on the T-cell had to be physically linked. If they do not form what's called a bimolecular complex, firm adhesion does not occur. "Our findings define a relationship between CD44 and VLA-4 that results in a cooperative system," Dr. Siegelman said. "If they aren't linked, the T-cells e...