When blood can't get to brain, special CT scan helps
...ot be sufficient if the closure is permanent. They say it may even be able to help predict which patients might go on to suffer a stroke after having one of their carotid arteries permanently closed. Perfusion CT may also help when a patient has a stroke that's caused by blockage of blood supply to part ...Life goes on without 'vital' DNA
...btle to be seen in the tests done on mice. "It may say as much about our inability to detect any phenotypes as it says about the function of this region," says David Haussler of the University of California, Santa Cruz, who thinks the work of Rubin's team is impressive and significant. "My sense is they...Cell growth and death controlled by single pathway in lymphoma cancer model
...emotherapy will not work. Instead, the researchers say it may be possible to target one or both of the ge...But the scientists also discovered five genes they say are known to be involved in a cell suicide process called apoptosis, but which had never been descri...Published research contains 'high level of statistical errors'
... unchanged, they are indicative of poor practice," say the researchers. "Our concern is that these kinds of errors are probably present in all numerical results and all steps of scientific research, with potentially important practical consequences." The researchers suggest that one way to minimise the e...Shortened chromosomes linked to early stages of cancer development
...ientists at the Johns Hopkins Kimmel Cancer Center say they have evidence that abnormally short telomeres - the end-caps on chromosomes that normally preserve genetic integrity -appear to play a role in the early development of many types of cancer. "Cancer researchers have debated whether shortened telo...New highways drive accelerating deforestation in Amazonia
... These huge projects will criss-cross the basin, say the team members, providing greatly increased acce... The key drivers of increasing Amazon-forest loss, say the authors, are rising deforestation and land speculation along new highways and planned highway ro...Discovery in parasite movement may offer insights into malaria
...pecific membrane receptor for what the researchers say is a "myosin motor." Toxoplasma motility may be a result of the myosin moving along the length of actin filaments in the parasite, Beckers said.Alternatively, it may be caused by the myosin holding onto the end of a growing actin filament. Either way...Without words, bullfrogs communicate through stutters in their croaks
... complex vocabularies to communicate, while others say a lot with very limited numbers of calls," said Andrea Simmons, professor of psychology, who presented the findings at 75th meeting of the Acoustical Society of America Monday, May 24, 2004. "A fundamental question in the study of communication by so...Super-effective 'jumping gene' created
...ting in the May 20 issue of Nature, the scientists say their artificial jumping gene sets the stage for c...- past and present -- in human health and disease, say the researchers. "Making this synthetic jumping gene was the home-run experiment we never thought w......he arteries that afflicts us all as we age. Others say they are simply too small to be living creatures. ...ry polarised and that has shocked me a bit." Some say the claims of Cisar's team are also fantastic. "They talk about 'self-propagating apatite'," says Jo...NIH awards $20.7 million to make smallpox vaccine safer
...re no reliable medical tests that can definitively say if a person currently has or has had atopic dermatitis in the past. The researchers will conduct both laboratory and clinical studies to understand why atopic dermatitis patients are susceptible to eczema vaccinatum, to find biomarkers that can defin...Tips from the Journals of the American Society for Microbiology
...mely at disinfecting drinking water and wastewater say researchers from the U.S. Military Academy, West P...effect when silver and UV radiation are combined," say the researchers. "Because it has also been reported for a DNA virus, it is expected that the synerg...Study examines future of species extinction, conservation
...g the fates of plants and animals, the researchers say it may be extremely difficult to predict which org...ke good news, there is a downside: the researchers say that a community's resistance to an environmental condition can shift over time due to yet another f...Oak Ridge National Laboratory to develop DOE leadership-class computing capability for science
...aid Secretary Abraham. It is no exaggeration to say that this machine will give both the U.S. scientific community and industrial sector a significant competitive advantage over the rest of the world. We received four excellent proposals in response to our Solicitation for Leadership-Class Computing C...Tests show biotech corn rules need revision
...ects to evolve overnight," he said. "The EPA rules say that if you grow Bt corn, you must plant a refuge of non-Bt corn for at least 20 percent of your crop." Caterpillars that can survive on Bt corn are rare at first, and only a few resistant adult moths emerge from Bt corn fields. But refuges of non-B...Lewis and Clark data show a different Missouri River
...tions of the river by the Army Corps of Engineers, say Robert Criss, Ph.D., professor of earth and planetary sciences in Arts & Sciences at Washington University in St. Louis, and Washington University undergraduate student Bethany Ehlmann, an earth and planetary sciences major in Arts & Sciences. Ehlman...Uncertainty in clinical tests raises health care costs
...lts that fall in the center of the "normal" range, say 9.7 mg/dL, may in fact be for patient samples with elevated calcium, defined as 10.2 mg/dL and above. At the same time, patients with measured values above the threshold, but who actually have normal calcium levels, may receive unnecessary follow-up ...Insulin-producing pancreatic cells are replenished by duplication
... adult stem cells in the pancreas, the researchers say that they do suggest strongly that embryonic stem cells or mature beta cells may be the only way to generate beta cells for use in cell replacement therapies to treat diabetes. The research team, which was led by HHMI investigator Douglas A. Melton ...Transplant rejection averted by simple light exposure in Stanford animal study
...don't change unless they're disturbed in some way, say by inflammation, he said. The scientists surmised that these cells might linger in the skin of a transplant patient and instigate trouble. Their latest experiments bore this out. The researchers tested their theory in two different sets of mice. In o...Scripps scientists look deep inside sharks and their high-performance swimming system
...'s exactly like tuna in that respect." The authors say these characteristics distinguish lamnid sharks and tunas from virtually all other fish and arose independently in each, most likely the result of evolutionary selection for fast and continuous locomotion. Shadwick says in this respect lamnids and tu...