Studies probe rapid evolution of Chinese tallow trees
...nk this may indicate the trees are going through a cycle where they are initially ignored by local insects, let down their defenses and consequently become easy targets. Such a process of evolution -- lower resistance by alien plants in the absence of appreciable natural enemies followed by rapid colonizat...Laboratory 'theme park' re-creates RNA world for study
...osers are removed, and winners multiplied. As this cycle repeats, slight mutations often appear in the RNAs, some of which create molecules superior to the parent molecule. Says Bartel, "Really, we end up selecting for the survival of the best molecules, and then propagating those survivors" Darwinian nat...Researchers one step closer to Holy Grail of neurobiology
...dying the animal in its home cage during the light cycle ensures that the mouse will not be exploring its cage. This approach removes biases due to fear and anxiety and provides a zero baseline. A computer automatically measured the responses to carefully presented sensory stimuli. The sensory stimuli adm...Monitoring malaria: Genomic activity of the parasite in human blood cells
...erythrocytes). The intraerythrocytic developmental cycle (IDC) is the stage of the P. falciparum life cycle associated with the clinical symptoms of malaria. Using data from the recently sequenced P. falcip...Science picks: Leads, feeds and story seeds for August 2003
...e bulk of ground water began its life in the water cycle in the clouds as rain and snow. Consequently, most ground-water contamination that happens from what people do on the land surface occurs during this recharge phase. USGS scientists in New Jersey are studying a research watershed with high levels of ...$13 million grant boosts breast cancer research
...ce of tumor cell arrest in the M phase of the cell cycle predicts response to paclitaxel. This study and the EGFR inhibitor project will use mass spectrometry in pre- and post-therapy biopsies to discover proteins that predict for drug sensitivity and resistance. (Jennifer Pietenpol, Ph.D., and Dr. Bapsi C...Study reveals genetic activity of key step in malaria parasite's cycle
...he third and critical stage in the parasite's life cycle when it invades red blood cells and wreaks the ha...he third, and harmful stage of the parasite's life cycle -- after it has passed from an infected mosquito to the liver of an infected person when it invades...Discovery may help in war against fire ants
...e young, which emerge from the female to start the cycle all over again. The research gets to a fundamental problem, Johnston said. "How does a parasite attack whether it is you or I or any other organism without our immune systems protecting us?" he said. "In the case of Strepsitera, it masquerades as ...Researchers identify protein modules that 'read' distinct gene 'silencing codes'
...effectors are released at the time during the cell cycle or during development when they are no longer needed to silence genes"....In men chronically exposed to magnetic fields, no disruptions of melatonin exists
...ticipated in the autumn study, when the light-dark cycle was 10 hours light-14 hours dark. All subjects had...y because the interaction of their ovarian hormone cycle with melatonin secretion might have made the study results difficult to interpret. The 15 test subj...Respiratory manifestations may be secondary to inflammation in cystic fibrosis patients
...line of pulmonary function attributed to a vicious cycle of airway infection and inflammation. There is now evidence that inflammation plays a pivotal role and may be present very early in life, even before the onset of respiratory manifestations. Background The inflammatory process in the CF lung is domi...Rapid evolution helps hunted outwit their predators
...nd the more edible algae will thrive, allowing the cycle to repeat indefinitely. Ellner suggests that this cycle of rapid evolution -- between defense and vulnerability -- could have parallels in human diseases. "...Anti-HIV statisticians win $1.125 million NIH Merit Award
...structured treatment interruption," where patients cycle on and off treatment, a process that seems to "tra...g the optimal treatment strategy, and learn how to cycle patients on and off over time according to how they're doing at each stage." The team believes their...Newly invented Endometrial Function Test (EFT®) solves the puzzle of unexplained infertility
...s at many different times throughout the menstrual cycle to establish the normal and abnormal patterns of e...men expressed cyclin E in their glands up to about cycle day 19, and then did not have any after that," said Kliman. "Infertile women, on the other hand, muc...Biological clock more influenced by temperature than light
...hronized to the temperature cycle. The temperature cycle entrained it. We fooled the clock by giving it a novel daily schedule, saying 'This isn't the end of the day. This is morning.'" Herzog's research also sought to disprove the notion put forth in 1998 that shining light on the backs of the knees wo...Two genes may interact to increase risk of lung cancer in smokers
...ween damage to the DNA repair pathway and the cell cycle control pathway, exposure to carcinogens present i...lso can lead to cancer. CCND1, one of the key cell cycle regulators, is important in cell cycle control and is central to the repair of DNA damage before cel...First West Coast baby born using frozen egg technique
...l the eggs they extracted. In late June Jennifer's cycle was synchronized to receive the embryos. The eggs were thawed and the surviving eggs were fertilized using intracytoplasmic sperm injection. Two of the resulting embryos were transferred into Jennifer's uterus, resulting in a single pregnancy. Ad...First West Coast baby born using frozen egg technique
...l the eggs they extracted. In late June Jennifer's cycle was synchronized to receive the embryos. The eggs were thawed and the surviving eggs were fertilized using intracytoplasmic sperm injection. Two of the resulting embryos were transferred into Jennifer's uterus, resulting in a single pregnancy. Ad...Electric vehicles promise economic benefits in the billions
...oduct, trade and labor, as well as impacts on fuel cycle emissions. Results were compared with the U.S. Department of Energy's more conservative forecasts. "Based on the scenario we looked at, the transfer of dollars from oil imports to domestic fuels--namely electricity--generates higher GDP, labor and re...Europes healthcare systems supports trend for quality and quantity in ART
...but also the numbers of embryos transferred in one cycle is declining, thus reducing the chances of multiple pregnancies that can be risky for both mothers and their babies. For instance, in 1997 three or more embryos were transferred in 52.6% of treatments. But in 2000 the proportion of transfers involv...