Ecologists simplify population theory
...n an environment where their food is supplied at a constant rate. "The very complexity of their connections ... "They eat so many species, it is as if there is a constant food supply." The theory of population dynamics the balance of nature relates to whether or not t...MIT probes cartilage on nanoscale
...ymer surface as the tip was moved up and down at a constant rate. "To have a window into how these GAG molecules deform just hasn't been done before in the cartilage field," Grodzinsky said. The results of this first experiment, in addition to new molecular-level theoretical simulations, have helped quantify ...New method for 'visualizing' proteins
...just a single crystal or a frozen object but is in constant flexing and tumbling motion. NMR visualizes the molecule in its normal environment and is based on measuring many small distances between adjacent, or nearly adjacent, atoms, like going from tree to tree. The new technology reported in the JACS pap...Researchers identify protein that regulates killer cells
...m and the viruses get smarter again. There's this constant evolution for the drive to survive, and viruses and cancer cells have the same drive to survive that we do." Binns conducted the research with Andreas Weihofen, lead author on the study, Marius Lemberg and Bruno Martoglio of the Institute of Biochemi...Does that 'java-jolt' affect coffee and non-coffee drinkers alike?
...ficantly throughout exercise, whereas it remained constant in trials conducted at three and six hours after ingestion. Generally, the concentration increased one and three hours after caffeine intake was greater than that after six hours. Conclusions Non-users demonstrated a greater ergogenic benefit o...Stem cells could determine how long we live
...mechanisms for repairing their DNA, which is under constant barrage from everything from radiation to free radicals. The notion that ageing happens because genetic mutations accumulate and slowly overwhelm these defences has been around for a while- but the idea that DNA damage in stem cells is the key to age...Ocean aquaculture: Technology, business practices, policies & caviar
...jacent Chevron gas platform. The camera allows for constant monitoring of the cage, the sea and weather conditions. Other automated innovations, such as a satellite tracking system that notifies researchers if the cage moves outside its watch circle, and an automatic feeding system known as "Robo Feeder," de...Generating genetic diversity in the nervous system
.... Each variable exon can be separately joined to a constant region of the gene, thereby creating the genetic b...at will have a unique variable region and a common constant region. Dr. Bradley and colleagues have discovered that that although the Pcdh gene clusters share ...Future advances of 20,000-year-old coatings technology detailed in upcoming Science magazine
...of protecting or decorating surfaces have remained constant across all the centuries and cultures of civilization. Matheson's paper in SCIENCE examines change in soft coatings technology from its current state by identifying key issues that attract research and development efforts at the dawn of the 21st ce...Tomorrow's super robots may owe their mobility to a cockroachs legs today
...l include: (1) the axis of rotation for the leg is constant during torsion and (2) the joint material can be approximated using a lumped-parameter element with uniformly distributed linear viscoelastic properties. The SDM process allowed an integration of a range of desired impedance into the structure of rob...UT Southwestern researchers ID key protein for communication within central nervous system
... those that are not important. In adults, there is constant remodeling of neurons and synapses that relates to ongoing processes like learning and memory. In neurological diseases such as Alzheimer's and Parkinson's, there is a loss of neurons and synapses, Biederer said. A better understanding of the ingredi...Gene controls plant's clock and flowering time
...nts could again maintain daily patterns even under constant light or darkness. "ELF4 is critical to keeping the clock working accurately," says Doyle. However, he notes that there are five or six other genes that play a role in the plant's clock. "Scientists still have a lot of work to do before we can explai...AAAS at the BA: Whale food, winners and losers in Antarctica and solar insights
...e Antarctic marine environment - possibly the most constant temperature regime on Earth. In the 25 January issue of Scienc e, researchers from the British Antarctic Survey showed that the environmental and ecological characteristics of lakes on Signy Island in the Antarctic were changing as fast, if not fast...Identification of the first gene in posttraumatic stress disorder
...ent, avoidance of cues reminding of the trauma and constant hyper-arousal. These symptoms may persist for years, and are often associated with significant disability and distress. The lifetime prevalence of PTSD in the general population is estimated to be of 10%, and the incidence of new cases of PTSD amon...The role of obesity and calories in cancer prevention
...ovide more protection against breast cancer than a constant low calorie diet, according to researchers at the Hormel Institute, University of Minnesota. "The manner in which caloric restriction is implemented may play an important role in the development of breast cancer," according to Margot Cleary, lead i...The eyes have it: Seeking expressions of the genetic risk for developing alcoholism
... "recover" baseline measures despite prolonged and constant exposure to alcohol. "A key finding of our study is that the adaptive response of saccades to alcohol is associated with a family-history status known to be associated with a genetic influence on the risk for alcoholism," said O'Connor. In other word...Natural insecticide identified as potential cancer prevention agent for early stage lung cancer
...ially in non-small cell lung cancer (NSCLC), where constant activation of Akt occurs. Akt, or protein kinase B, is recognized as one of the most important molecules that promotes the survival of tumor cells by playing the critical role of controlling the balance between survival and apoptosis (programmed cel...Finding a 'Holy Grail': simulated and experimental protein folding compares nicely
...g and unfolding events from which the folding rate constant was obtained. At Stanford, physical chemist Vijay Pande and graduate student Christopher Snow accumulated more than 700 microseconds of molecular dynamics simulations by dividing the work among more than 30,000 volunteer computers distributed around ...Study: Isoflavone-enriched soy proteins fail to increase bone mineral density in young women
...e said. "Other variables also remained essentially constant over the year, including normal menstrual patterns in both groups." Isoflavones such as genistein are structurally similar to human estrogens and for that reason have some estrogen-like properties, Anderson said. Scientists and drug companies have b...Once big bad wolf, now man's best friend: Science studies trace dogs' origins
...mutations in the control region have occurred at a constant rate, the researchers could estimate how long it had taken the subgroups to evolve. If the subgroups were the result of multiple wolf introductions, domestication should have begun around 15,000 years ago, the researchers found. If there had only be...