Europe leads the world for IVF treatment
...ver the "take home" baby rates seemed to be fairly constant throughout Europe with approximately 22 per cent of treatment cycles resulting in a live birth. The numbers of twin, triplet and quadruplet births varied considerably between countries. Higher multiple pregnancy rates were reported in southern and...Study: fertilized lakes less stable than previously thought
...ugh the level of phosphorus fertilization remained constant throughout the experiment. "By comparing algal variability before and during experimental fertilization, we have shown for the first time that fertilization of lakes changes their fundamental properties to make them more erratic and much less predi...Faulty practices threaten condor program
...e threats to humans, and the released birds are at constant risk of death by lead poisoning from eating carcasses contaminated with bullet fragments, which was a main cause of the extinction of wild condors in the 1980s. "Many condors are reared in captivity by humans using condor-shaped puppets, and this h...Research shows that brain receptor may control obesity
...sts food intake and energy expenditure to maintain constant levels of fat, similar to the way that a thermostat in a house maintains constant temperature. Previous research by Dr. Cone and other scientists also found that blocking a related n...Aging alters sleep and hormone levels sooner than expected
...d mid-life (35-50). Although total sleep remained constant as young adults moved into mid-life, the proportion of slow wave or deep sleep decreased from nearly 20 percent of a normal night's sleep for those under 25 to less than five percent for those over 35. Growth hormone secretion, which occurs primaril...The ultimate pocket protector--radiation detection made easy
...ly transported radioactive medical isotopes were a constant source of false security alarms for Customs officials. They wanted an instrument that could quickly detect the kinds of radioactive materials they really worry about-materials such as weapons-grade plutonium. To detect materials such as plutoniu......on-the pre-industrial value-and the Sun shone at a constant 1367 watts per square metre at the Earth's surface. In the second, there was twice as much CO2, adding an extra 4.17 watts per square metre to the Earth-bound radiation. In the final, geoengineered scenario, the doubled CO2 was countered by cutting 1...Snapping shrimp drown out sonar with bubble-popping trick, described in Science
...se shrimp usually are so dense that they produce a constant crackling background noise, similar to the sound of burning dry twigs. Until recently, scientists had assumed that the snapping noise occurred when the two parts of the claw banged shut. Now, however, a team of physicists and a biologist have discove...Defining a niche that regulates stem cells
...her its ratio when compared to stem cells remained constant as the flies aged. "The terminal filament cells and the inner sheath cells changed in number and location over time," said Spradling. "However, the cap cells seem to remain the most constant, and they are in direct contact with the stem cells. Also...Wild salmon vulnerable to climate change, Science study reports
...ly, fisheries managers assumed the environment was constant when they calculated the maximum number of salmon that fishermen could harvest. But our study suggests a need for new, flexible management policies that take climate and lake nutrient levels into account," said lead Science author Bruce Finney of t...Boston hospitals report early results of endostatin clinical trial
...ndostatin provides us with the ability to maintain constant levels of the drug in patients rather than the 'peaks and troughs' observed with the current regimen," said Kufe. "We will look for any differences resulting from this approach." Boston hospitals are currently selecting the final patients into the P...Instant replay: study finds potential mechanism for building long-term memory
...knowledge and memories over a lifetime despite the constant turnover of molecules and proteins. The insight al...lidated and remains largely stable, despite of the constant turnover of the nuts and bolts of our brains."...Simple rules predict the outcome of predator-prey struggles
...eral equations can explain the complex switch from constant population sizes to extreme cycles." The test was simple enough: Day after day for more than 14 weeks, single-celled green algae ( Chlorella vulgaris ) and the microscopic animals that eat them (planktonic rotifers, Brachinus calyciflorus ) face...Neuroscience contest prompts 'thinking about thinking'
...es from the experimental facts at hand. Indeed the constant quest for new data can distract researchers from the important job of fitting the facts together in a coherent picture. "When you are trying to answer a question, you either think about the facts you have or you go out and get new ones," he said. "Th...Infections may trigger autoimmunity via rare, but normal process
... flu's virulence. The hemagglutinin gene undergoes constant mutation that results in the appearance of several dangerous new influenza strains each year. The researchers then immunized the transgenic mice with influenza virus. The result was an autoimmune response. "The simplest prediction was that the mouse...Brain damage in autism: not what scientists once thought
... autistic child's fixation on spinning objects and constant whirling around to long-suspected damage to the brain's control center for movement, balance and equilibrium. Reporting in the December 2000 issue of the Journal of Autism and Developmental Disorders, the Hopkins team said test results of parts of ...Economic costs of extreme weather, state by state
...ng. The Web site reports decades of information in constant 1999 dollars(updated from the previous 1997 benchmark). By taking data suppliedin multiple, incompatible formats and harmonizing them to specificstandards, the site allows relative comparisons among extreme-weatherimpacts and among states or regions....Established ecological relationship is flawed says new study
...he number of species was supposed to increase as a constant multiple of the increase in log area. However, a n...ant species-richness and land area surveyed is not constant as formerly believed. The problem is we don't yet know how the relationship changes with scale in ot...Coping with natural disasters along the Pacific Rim
...nd shaking and loss of life and property have been constant dangers in the past,`` he notes, ``as evidenced by the devastation at Anchorage, Alaska (1964); Mexico City (1985); Kobe, Japan (1995) and Chi-Chi, Taiwan (1999). Because of the inexorable, continuing differential movements of tectonic plates around ......s loss of speech, loss of voluntary motor control, constant hand wringing, and seizures. The work, published in the March 2001 issue of Nature Genetics from Rudolf Jaenisch and colleagues, suggests that the genetic defect underlying Rett syndrome has an effect not only during brain development before birth b...