MBL scientists confirm evolutionary exception
...Matthew Meselson provide the strongest evidence to date that a higher-ranking taxon has evolved without sexual reproduction. The researchers studied the bdelloid rotifer, a microscopic animal found throughout the world in almost all aquatic habitats. Bdelloids appear to have given up sex 50 million years...NIEHS and UNC to collaborate on registry of 20,000 subjects
... the ability to re-contact participants at a later date for follow-up studies. "There were no resources such as this available to NIH or UNC researchers prior to this, although there are many available anonymous DNA repositories," Dr. Blackshear said. Data from the follow-up studies will allow scientist...DNA registry to study links among genetics, environment, disease
...ntists to contact registry participants at a later date for their permission to obtain additional information, to invite their participation in additional studies and to offer them the option to drop out of the registry. Currently, no similar resources are available to the National Institutes of Health or...Farmed salmon more toxic than wild salmon, study finds
... 9) Science, is the most comprehensive analysis to date of salmon toxin concentrations. "We think it's important for people who eat salmon to know that farmed salmon have higher levels of toxins than wild salmon from the open ocean," said IU School of Public and Environmental Affairs Distinguished Prof...Beagle 2 fails to call Mars express
...which is autotransmit," said Dr. Sims. "The latest date that will become active is 2 February." "My personal view is that, if we have not received a signal within 5 to 10 days of that event, then we have to assume Beagle is lost." NOTES FOR EDITORS Since Christmas there have been 13 attempts to communic...Beagle 2 team still hopes to repeat Mars landing success
...de 2' should eventually be activated. The earliest date by which this mode could become operational was 3 January. In this mode, the receiver is on for 59 minutes out of every hour throughout the Martian day, and the spacecraft sends a carrier signal five times in each daylight hour. During the Martian n...A big surprise: Young nerve cells can rewind their developmental clocks
...lieved that it was possible to push back the birth date of a cortical neuron. There is this central tenet ...orn. So a cortical cell's identity is based on the date of its birth. The first cortical cells to be born populate layer 1, the most superficial layer, whic...Chimp vs. human DNA: what's in the 1% difference
...nd chimps. In the most comprehensive comparison to date of the genetic differences between two primates, t...ans' abilities to digest dietary protein and could date back to the time when early humans began eating more meat, Clark speculates. Anthropologists believe...Lifestyle accounts for difference in chimp, human genome
...nd chimps. In the most comprehensive comparison to date of the genetic differences between two primates, t...ans' abilities to digest dietary protein and could date back to the time when early humans began eating more meat, Clark speculates. Anthropologists believe...Symbiotic fungi promote invasion into diverse plant communities (Rudgers et al.)
..., where Italian swallows winter, predicted arrival date of individuals in consecutive breeding seasons. After favourable winters swallows arrived earlier and this had positive consequences for breeding success. Population trends of European long-distance migrants may thus depend on ecological conditions i...Scientists announce long-sought mouse model of human pancreatic cancer
...ntial drug targets. However, none of the models to date had produced cancer in mice that faithfully replicated what occurs in humans. The team headed by Aguirre and Bardeesy used sophisticated bioengineering methods to control the activities of mutant genes in the pancreas. One, a mutant KRAS gene, was ac...How lice and bird feathers stick together
.... The study "is one of the best demonstrations to date of why parasites are often specific to a single species of host and under what conditions they jump hosts," said evolutionary ecologist Dale H. Clayton, the study's first author and an associate professor of biology at the University of Utah. "This i...Estrogen promotes gender differences in brain's response to stress
...ich estrogen may be producing these effects are to date unknown, but currently under investigation. It is known that estrogen can interact with molecular processes involved in the stress response, and that certain genetic variations have been demonstrated in clinically depressed women. However, how thes...Cell death promotes learning growth
...eted effect on neurogenesis depending on the birth date of new neurons. The number of newly born cells increased contingently with the late phase and a large proportion of these cells survived for at least 4 weeks and differentiated into neurons. In contrast, the late phase learning decreased the number o...Soil fungi affect parasitism of foliage-feeding insects
...anisms and those feeding above-ground. However, to date these have involved two or three trophic levels, because it has been assumed that the effects weaken as one progresses up or down a food chain. In a forthcoming paper in Ecology Letters, Gange, Brown & Aplin show that strong interactions occur betwe...Newborn screening for certain genetic disorders has benefits and some drawbacks
...d from only one blood sample from the newborn. To date 24 states have started this expanded newborn screening using tandem mass spectrometry. Four states have not yet implemented mandated programs and four states offer non-mandated expanded screening. In this study, Susan E. Waisbren, Ph.D., from Childr...UT Southwesterns capital campaign passes $300 million mark
...ine capital drive have brought the total raised to date to$301 million, and the enthusiastic donor response has persuaded campaign leaders to raise the overall goal from $450 million to $500 million. The additional $50 million will go to the "Clinical Services Initiative" component of the drive. A new $50...Higher blood levels of sitosterol may be associated with increased risk for coronary events
...om PROCAM based on age, gender, smoking status and date of investigation. Phytosterol concentrations, including sitosterol, were measured in samples collected at baseline in order to determine an association between phytosterol blood levels and increased risk for future coronary events. Results from t...DuPont awarded highest US honor for technological innovation
...irst-developed and most widely used alternative to date was hydrochlorofluorocarbon (HCFC) 22. While less ozone-depleting than CFCs, HCFCs are governed under the Montreal Protocol and are being phased out globally. DuPont commercialized the first of its non-ozone-depleting hydroclorofluorocarbons (HFCs...Hot cocoa tops red wine and tea in antioxidants; may be healthier choice
... which they say is the most complete comparison to date of the total antioxidant content of these three popular beverages, will appear in the Dec. 3 issue of the Journal of Agricultural and Food Chemistry , a peer-reviewed journal of the American Chemical Society, the world's largest scientific society. ...