How the adrenal 'clock' keeps the body in synch
...etermines sensitivity to ACTH. Under conditions of constant darkness, however, mice with normal adrenals that ...utant animals with normal adrenals after 2 days in constant darkness indicates a critical dependence of the adrenal on input from the master clock, Oster said. ...Surprise finding for stretched DNA
...y to the held belief, the stretch-torsion coupling constant of DNA is a negative value. This observation also implies that if we overwind the DNA, the molecule should get longer. Indeed, we found that Overwinding caused the DNA molecule to extend by about 0.5 nanometers per turn." To explain the overwindin...Researcher gives hard thoughts on soft inheritance
...eritance because the nucleotide sequence of DNA is constant and only changes by rare random mutation as it is passed down the generations. But there also is evidence, especially in plants, that non-genetic factors modifying the DNA can also be inherited. The modifications of the genetic material take the fo...Proprio Foot stands and delivers for amputees
...e for the next step. Acting. The AI transmits a constant stream of signals which instruct high-precision actuator technology to act and deliver optimal function. Canadian company Dynastream's expertise in real-time motion analysis enables the PROPRIO FOOT to detect and adapt to changes making for easie...Role of protein in immune response may aid HIV research
...nstantly. The researchers suggest that the liver's constant protein production may help fulfill the organ's preventative role as a blood filter. ...Sound investment: A new mathematical method provides a better way to analyze noise
...s embedded in noise," Magnasco says. So he added a constant tone beneath the white noise. That tone appeared in their histograms as a thin yellow band, bubble edges converging in a horizontal line that cut straight through the center of the froth. This, he says, proves that their algorithm is a viable method ......, motor proteins are also actively involved in the constant re-organization of the cytoskeleton itself, which is necessary for cell motility and mitosis. During these processes, cytoskeletal filaments are constantly in motion, yet highly ordered structures such as the mitotic spindle are assembled in this dyn...'Friend' protein keeps nerve signals in check
...s from as far back as our early childhood with the constant protein turnover going on in our brains," said Richmond. "So understanding how proteins function to control synaptic strength is really important." Richmond and her colleagues used the soil nematode worm Caenorhabditis elegans to study the function...Wild bees and the flowers they pollinate are disappearing together
...other group of pollinating insects) stayed roughly constant in Britain, but increased in the Netherlands. L...nd-pollinated or self-pollinating plants have held constant or increased. The pattern is slightly different in the Netherlands, where bees have declined on...News tips from the Journal of Neuroscience
...he glutamate binding site altered the dissociation constant and cooperativity of the anion current, unlike glutamate transport itself. Thus, glutamate binding sites on different subunits must be occupied to generate the anion current, indicative of intersubunit interactions. Delany Torres-Salazar and Christop...Large dinosaurs were extremely hot in their day, UF study finds
...heat more slowly, and thus maintained higher, more constant body temperatures similar to today's birds and mammals. The researchers show that this increase in body temperature with size has been observed in modern crocodiles. "The study is an important contribution to the scientific discussion about dinosau...Math and fossils resolve a debate on dinosaur metabolism
...nertia allows the body to approach homeothermy, or constant body temperature, when the ratio of body mass to s...inosaurs (but not the smaller ones) had relatively constant body temperatures maintained through thermal inertia. Gillooly et al. then compiled data from eight ...Ancient raindrops reveal the origins of California's Sierra Nevada range
...s split by an ancient subduction zone--a region of constant geologic upheaval, where a plunging oceanic tectonic plate continuously pushed the continental North American plate higher and higher to create the Sierra Nevada range. This version of events is in sharp conflict with the "recent uplift" scenario, ...New therapy may mean less dietary restrictions for celiac sufferers
.... However, the ubiquitous nature of gluten poses a constant threat to celiacs, and a majority of celiac patients who adopt a restrictive diet still exhibit structural and functional gut abnormalities. "Non-dietary therapies that allow celiac patients to safely incorporate low-to-moderate levels of gluten into...Nutrition a major factor in rise in twin pregnancies
...he twins will be of different sex - was relatively constant from 1920 until the 1960s, but there was then the well-known dramatic increase with the advent of induced ovulation and IVF reaching 300 in every 1000 IVF conceptions by 2000. Among monozygotic (MZ) twins, caused by embryo division (so all are of ...New method for dating art prints and early books borrows know-how from genetic science
...tion in print quality is related to the relatively constant age-related deterioration of the woodblocks rather than to events during each press run. Hedges' copperplate studies focused on two books containing early maps of Jamaica, Cuba, and Hispaniola. One of the books, by Porcacchi, was printed in six edit...Rangeland repair enters phase 2
...ere initiated in 2003 to help combat erosion. The constant military training activities have taken their toll on the land compacting soils, damaging vegetation and increasing the potential for soil loss. That increases the possibility of sediment filtering into local water bodies, Fox said. Phase 1, during...Natural selection in island sheep
...nderlying the trait. Some of these models assume a constant environment, which is fine for breeders, who can artificially control their subjects' environment, but proves problematic for evolutionary studies of wild populations. To overcome these limitations, the researchers incorporated a statistical tool ...Taking evolution's temperature: Researchers pinpoint the energy it takes to make a species
...undings, as opposed to a mammal, which regulates a constant body temperature, scientists could more precisely measure rates of speciation caused by the environment. In the end, it is individual metabolic rate - how fast an organism burns food relative to its body weight - that primarily determines evolutionar...Ancient Etruscans unlikely ancestors of modern Tuscans, statistical testing reveals
...females) or large (300,000 females) populations of constant size, an expanding population, and scenarios involving migration and selection. Despite the range of scenarios created, the scientists could not find a match between the observed archaeological data and the simulations. Christian Anderson, a former S...