Libby and the nuclear hourglass.(Stamps International)

Chemistry International | November 1, 2008| | Copyright

Radiocarbon dating is one of the most important radiometric methods available to estimate the age of carbon-containing materials up to 60 000 years old, and has thus found multiple applications in archeology, geology, and other branches of science. It is based on the use of the naturally occurring carbon-14 radioisotope, which is continuously generated in the stratosphere and upper layers of the troposphere when cosmic rays interact with atomic nitrogen. This nuclide is quickly oxidized to carbon dioxide and enters the global carbon cycle, where it slowly begins its ...

Read all of this article with a FREE trial to HighBeam Research

Related newspaper, magazine, and trade journal articles from HighBeam Research

(Including press releases, facts, information, and biographies)

Ear infections, part 1. (What Parents Want To Know About...)
Newspaper article from: Pediatrics for Parents ; ...Putting an applicator into these ears is even more disastrous in terms of plugging up the ear canal. Doctors often have to clean out the ears of children with this complication...these children are put on regular ear wax dissolving drops to lessen...
Ear infections: facts for parents about otitis media. (Parents).(Pamphlet)
Newspaper article from: Pamphlet by: National Institute on Deafness and Other Communication Disorders ; ...infections. What's Happening Inside the Ear When My Child Has an Ear Infection? When the ears are infected the eustachian tubes...They keep air pressure stable in the ear. These tubes also help supply the ears with fresh air. * The adenoids are...
Ear disease
Magazine article from: DVM ; ...ear. The external ear is formed by two carp...cartilages gives the ears of different dog and...German Shepherd's ears stand straight up...connect the external ear to the skull The external...Dogs' and cats' ears initially have a vertical...part to the external ear canal; the ...
Ear problems very common in dogs _ but so are solutions.
Newspaper article from: Knight Ridder/Tribune ; ...out are more prone to ear infections. Left untreated, dirty ears can cause chronic infections...grooming, cleaning the ears and keeping them dry. Ear infections can be very...using a preventive ear medicine in the ears after every bath...
Now ear this! Silence mites and other ear problems that can make your pet miserable. (Healthy Pet).
Magazine article from: Prevention ; ...those with floppy ears, are especially at risk because their ear flaps can trap dirt...and length of the ear canal, the amount of hair in the ears, whether the ears...moisture. For floppy-ear breeds, air out the canals by hoisting the ears up on top of the head...
The ears: your personal sound system. (includes related article and list of information sources) (Cover Story)
Magazine article from: Current Health 2, a Weekly Reader publication ; ...Structure of the Ear Let's take a look at how our ears work. Ears are made...middle, and inner ear. We hear something when our ears pick up sound waves...combination.) Common Ear Aliments We usually take our ears for granted--at...
Ear cleaning made easy: common ear disorders can result from a number of different factors. It's important to understand basic ear care.(Health)
Magazine article from: Dog Watch ; ...inflammation of the outer ear canal, known as otitis...Because a dog's ears are L-shaped (a vertical...reduce wax build-up and ear infections. Clean Ears: Just a Cotton Ball...dirt or disease in the ears. A healthy ear will be pink in color...
Ear infections, part 2. (What Parents Want to Know About...)
Newspaper article from: Pediatrics for Parents ; ...Many parents suspect ear infection in young...with or tug at their ears. My experience is...while tugging the ears, fever, irritability...parent suspects an ear problem, the ear...Many diagnosed "ear infections" probably...but sterile, middle ears. Complicating matters...
Ultimate Ears Provides TESSCO Customers with Rockstar-Quality Sound.
Business Wire ; ...Market IRVINE, Calif. -- Ultimate Ears, the leading supplier of in-ear-monitors for professional musicians...and sound signatures used in Ultimate Ears' professional in-ear-monitors. Ultimate Ears' Metro.fi and Super.fi families...
Ear-Tube Surgery May Adversely Affect Childhood Development, Study Finds.
Newspaper article from: Knight Ridder/Tribune Business News ; ...eardrums as a remedy for repeated, severe ear infections or a chronic buildup of fluid in the middle ear. The tubes have been shown to reduce the number of infections in children who have recurring ear problems. Tubes also are thought to be a good...

Find more facts and information related to the article "Libby and the nuclear hourglass.(Stamps ..."