Tag: "evidence" at biology news
Caribbean Lizards Evolve Independently
...Although evolutionary convergence has beentaken as evidence
for the working of natural selection, the study is unique inshowing that entire communities have converged. This goes against the grain ofmost evolutionary thought which stresses that random events -- a meteoritestriking Earth or a hurricane wiping ...
Excavations In Prehistoric Chinese Cave Uncover Unusual Collections Of Large Mammals
...lexbehaviors, and the cave findings so far provide evidence
thatearly humans in southern China had the ability... lots and lots of babyStegodons. In fact, we found evidence
of only one adultindividual, but many youngsters." With the rhinos, the story was quite different. A...
Pitt Researchers Develop Strategy To Use Dendritic Cells To Treat And Prevent Tumors
...il the end of the experiment (72 days) without any evidence
oftumor cells. Similar findings were observed when researchers vaccinated another setof mice with established tumors using DC's that were simply co-cultured withtumor cells. In contrast, control mice that were injected with either DC'salone ...
Using PET Scans To Monitor Cancer Cells' Activity And Predict Who Will Develop Alzheimer's, Other Diseases
...on's, stroke and epilepsy.Phelps points to this as evidence
that advancement in radiotracer chemistry isallowing PET to move more fully in the everyday medical practice. Paper ORGN 2 will be presented by M. E. Phelps from 9:20. to 10:05 a.m., Sun.,March 29, in the C...
Butterfly Wings, Beetle Horns Teach Biologists Basic Lesson In Development's Laws
... long been suspected that this is thecase, but the evidence
has been indirect. For example, your arm may grow to acertain length because of some genetic development program within that arm. Butif you are malnourished as a child, your body would have been smaller and yourarms proportionately shorter because of...
Engineering, Math Shows Short-Legged Human Ancestors Were Very Efficient At Strolling Through Their World
...ate and lecturer in anthropology, who will present evidence
Thursday morning at the annual meeting of the Amer...as animals need to go faster or farther. There is evidence
that from 2.8 million to 1 million years ago the climate got progressively drier and vegetation beca...
US-Cuban Scientific Collaborations Jeopardized By Travel Restrictions
...s. The report states that according to anecdotal evidence
collected by the AAASScience and Human Rights Program, younger Cuban scientists appear to be morelikely to be refused entry in the US due to the suspicion that they willimmigrate. The report states that in the past year, these scientists have had tos...
New Test Opens Window On Corrosive Free-Radical Activity In Individuals
...cal activity in individuals." To date, the evidence
linking free radicals to disease and aging --through a biochemical process analogous to rusting -- and the supposition thatantioxidants can limit the deleterious effects of free radicals have been basedon statistical studies of groups of people and o...
Pitt Researchers Find Way To Block Cellular Growth Pathways And Inhibit Tumor Growth
...nstitute (UPCI) researchers arepresenting exciting evidence
from animal models that blocking two cellulargrowth pathways causes tumor cells to die. "We are currently designing aclinical trial for patients with head and neck cancer based on the extremelyencouraging results we have seen in these studies," said ...
Study Finds Some People Are 'Born To Smoke'
...pressure undoubtedly play a role, there ismounting evidence
that some people are "destined" to become smokers because theyare inherently more sensitive to the effects of nicotine---particularly thepleasurable effects---than people who are not tempted to smoke again. In a new study, researchers from the Unive...
How Did Life Begin? Biochemical Evolution On Chemical Surfaces
...tarctica. He'shoping these minerals still contain evidence
of primary biocatalysis. Furtherresearch will include chemical experiments to see if the zeolites actuallycarry out the chemistry he proposes, and the use of computer models to studythe structure of the channels. Smith's work on zeolites was...
American Heart Association Journal Report: Gene Therapy Findings Updated: Treatment Used In Patients With Blocked Leg Vessels
...d by magnetic resonance imaging. Angiogramsshowed evidence
of newly visible vessels in seven of the 10 treated limbs. At follow-up examinations, one to six months after the last injection,blood pressure in the individuals' ankles had increased from 0.33 to 0.47 ankleindex. "The blood pressure in the...
Kaposi's Sarcoma Caused By Virus Usually Transmitted Through Homosexual Sex, According To UCSF Study
...amined stored blood specimens from all 800 men for evidence
of antibodiesto a specific protein made by cells infected with HHV-8. A positive antibodytest indicates the presence of the virus in the body. The researchers detected these antibodies to HHV-8 in 37.5 percent, or223, of 594 men who reported...
Hard Hearts: New Discovery Of Bone In Heart Tissue May Explain Valve Disease
...ed valves. "Finding thisprotein and actual bone is evidence
that valve calcification is an activeprocess of laying down organized bone tissue, not a passive one, as was oncethought," says Mohler. But that still leaves the question: How did bone cells get into theheart? "One theory is that, under the ...
Adults Need To Increase Intake Of Folate; Some Women Should Take More
...f cardiovascular disease. But there is conflicting evidence
about whether increasing folate or B6 intakeleads ...against colorectal cancer do notprovide conclusive evidence
of a benefit, the report says. Upper Levels Set The committee set the tolerable upper intake level...
Learning About Evolution Critical For Understanding Science
...ok: summarizes the massive amount of scientific evidence
in support of evolutionand suggests effective ways of teaching it; explains the nature of science and how it differs from other ways of knowingabout the natural world; provides eight sample activities that teachers can use to develop students'un...
Retinoic Acid Used In Cancer Treatment
... "In the meantime," he says, "I think we're adding evidence
that an adequate supply of carotene in the diet is obviously beneficial for anyone who wishes to stay healthy and avoid cancer."...
Possible Trigger For Heart Failure Identified In Lab Animal Studies
...of medicine,add to the growing array of scientific evidence
incriminating TNF in damagingheart tissue. They s...hatthe Dallas team's research "provides additional evidence
that cardiacinflammation can evolve" to a severe form of degenerative heart muscle diseasecalled dil...
First Evidence That Localized Arthritis Gene Therapy Heals Distant Diseased Joints
...clinical use. "This offers the first evidence
that arthritis gene therapy can producewidespread,...nt surgery. These knuckles are being examined for evidence
of gene therapy activity. The Pitt researchers have found evidence
of gene expression in all patien...
Reduced Nutrients Still Cause Problems In The Neuse And Tar-Pamlico Rivers
...urban, and industrial sources, the report presents evidence
that natural geologic sources of phosphorus increase the problem in these two basins. Based on analysis of ground-water and stream samples from areas throughout the Coastal Plain, ground water that empties into streams in some parts of the basins con...
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