Horses Prefer Bridles That Have A Bit Missing
...tually unchanged: ametal bar or chain, attached to rings on either side of the horse's mouth. Bypulling on ... hisbitless bridle, the reins run through the side rings to a third ring, whichhangs below the jaw. A loop passes through this ring and up over the horse'she...Research Reveals Link Between Development And Contamination In Urban Watersheds
...own indistinct layers. They are comparable to tree rings in recording historicalclimate changes. Three reservoirs sampled in suburban areas of Dallas andSan Antonio, Texas, and Washington, D.C., showed dramatic increases inPAH'S with urbanization. These increases are occurring in spite of morestringent e...Small-Scale Fires Key To Understanding Forest Structure
...growth ring per year and because the width ofthese rings is affected by climate conditions, scientists can date fire yearswith accuracy. "Some fires burned throughout the area," says Beaty. "In 1795, 1829 and1883 there were major fires that burned everywhere and these were also very dryyears throu...Insights Into The Proteasome - A Fascinating Macromolecular Machine For Protein Degradation
... The 11S regulator, or PA28, binds to the outer rings of the proteasome and modulates its activity; the biological function of PA28 is presumed to be related to the proteasomes role in antigen processing. Recently, Christopher Hill and coworkers from the university of Utah, Salt Lake City...'Rolling Circles' Provide New Way to Amplify and Detect DNA
...f Rochester chemist Eric Kool has developed minute rings of DNA -- dubbed "rolling circles" -- that can crank out more copies of the genetic template less expensively than methods now at scientists' disposal. A patent for the technology has been approved by the U.S. Patent Office and will issue soon. ...MIT Biologists Identify Aging Mechanism
... cell mortality. "Setthe clock early and the alarm rings early." An article to be published in the ...ed above, could "set the clock early (so) thealarm rings early"? Their experimental results suggest a paradox. The formation of ERCs may be aresult of damage......vised a method of creating medically useful linked rings of atoms that do not rely on the toxic, expensive,... naturally occurring biological molecules) contain rings of atoms linked together. If we wish to treat diseases by the discovery of new drugs or design new ...More To Drought Than Meets The Eye
...g. 14) in Albuquerque. "When we looked at the tree rings for droughtyears, some trees that are considered i... the zones. Because trees grow individual rings each year, tree ring dating --dendrochronology -- is often used to determine the age of trees by loo...Duke Ecologist Says Logging Is Creating 'Mahogany Deserts'
...verflying aircraft, Snooksaid. Because the growth rings of mahoganies she has examined don't form at annualintervals, Snook can only guess at the species' maximum age. Based on extrapolationand evidence, including old photographs of huge harvested logs and four-foot-wideboards, she speculates that mahogan...Bark Beetle Infestation Spurs Multifaceted Study
...s before they were cut." Because many trees have rings that grow one per year or one per season,tree ring...be garnered from the rings.Archaeologists use tree rings to identify the age of archaeological sitesfrom the cutting dates of construction materials. Taylo...Cornell Researchers Precisely Date Wood From Ancient Tomb In Turkey
...y analyzing variations in the width of annual tree rings (which are altered by changes in climate and moist...o sunlight and increased soil moisture led to tree rings in juniper, cedar and pine samples from Porsuk, a site in central Turkey, that were three to eight t...Enzyme's "Magic" May Hold Key to Anticancer and Antimicrobial Drugs
...w the yeast enzyme unlinks two interlocked rings of double-stranded DNA. In humans, topoisomerase II acts on long, tightly coiled linear DNA, separating newly replicated chromosomes prior to cell division. "This work provides a molecular picture that basically ...