Schema-Root.org logo

 

  cross-referenced news and research resources about

 carbon-14

Schema-Root.org logo
images:  google   yahoo YouTube
spacer

updated Wed. March 6, 2019

-
In 1949, scientist Willard Libby of the University of Chicago developed a method for determining the age of organic material by measuring the amount of radioactive isotope carbon-14 within that material. Radiocarbon dating sparked a revolution in archaeology. Mystery Tales launched in 1952 just as the ...
In addition, naturally occurring radioactive isotopes present in water such as tritium, carbon 14 and noble gases can be used to estimate groundwater age — from a few days to one millennia. When groundwater is found to be tens of thousands of years old, this means that the water flow is very slow and that ...

Archaeological evidence suggests the date of the Ein Gedi synagogue [where it was found] is approximately 500 CE, but carbon-14 testing reveals that the scroll itself is much older, dating to ca. 300 CE. The scroll was found in the Torah niche of the Ein Gedi synagogue during excavations in 1970, so we ...
Mar 22, 2018 — Scientists use isotopes of carbon, carbon-13 and carbon-14, to study the age of organic material. But the activity of humans is distorting the clock. Curt Stager tells Martha Foley how added carbon in the atmosphere, pollution, and nuclear testing have made it harder to study the natural ...
Lenovo also brought back the touchscreen option in the Carbon's 14-inch display, which was missing in the last generation. It's a nice thing to have, especially when browsing around the web, but the laptop's matte finish makes the touch experience a bit rough as compared with mobile glass screens.
Scientists know the precise rate at which one variant of carbon found in the atmosphere, Carbon-14, decays into another variant (or isotope), Carbon-13. Thus, by determining the ratios of these types of carbon in samples taken from the Arctic, they can determine when the carbon was first drawn out of the ...

The remains of hair and fabric are currently being studied through carbon-14 dating at the University of Cambridge (United Kingdom). UGR researchers are also thoroughly involved in analysing the finds, with the Department of Organic Chemistry currently examining the residues found in the ceramic containers.
We can't know because with all due respect carbon-14 dating, it's impossible to reliably date living olive trees, aver olive experts Arnon Dag and Oz Barazani of the Volcani Agricultural Institute. "The ancient tissues at their core degrades in time and vanishes," Barazani explains. "All that remains is the ...
There, experts tried Carbon-14 dating, which measures the amount of radioactive carbon still in an organic object after it has died. The lab ...
Like all organic molecules, crystallines contain carbon, including trace amounts of the radioactive isotope carbon-14. Unlike other proteins, which undergo ...
Rare forms of atoms, like carbon-13, carbon-14, and nitrogen-15, have long been used to figure out the ages of ancient artifacts and probe the ...
A different isotope, carbon-14, is used to determine the age of organic materials such as bones or plant matter, a more widely-known process ...
These include carbon-13, carbon-14 and nitrogen-15 but future studies may also reveal others, such as isotopes of hydrogen, helium and ...
A streak of lightning in the skies over Japan has generated positrons — the antimatter equivalents of electrons — and radioactive carbon-14, ...
"The carbon-14 dates will come later," said Katrine Balsgaard Juul, an archaeologist and curator with the Vejle Museums in southern Denmark, ...
Traditionally, scientists have used carbon-14 dating to estimate the ages of moraines in lower-lying areas. That kind of dating suggested that ...
Israeli archaeology was late to adopt carbon-14 dating techniques, and until recently dated sites relying largely on pottery. Today not only is ...

He said that carbon-14 and other dating methods indicated it came from the second or third centuries AD and appeared to be unfinished.
Careful study of weave patterns and design bolstered the suspicions—and, decades later, carbon-14 dating proved that at least some of the ...
The most reliable way to tell fossil fuels apart from biofuels lies in their carbon isotope composition: In fossil fuels, all of the carbon-14, which ...
One such tool is carbon-14 analysis, which is used to determine whether ingredients are sourced from petrochemicals or whether they are ...
This can be measured over thousands of years by the carbon 14 method. During times of maximum solar activity solar wind is also at a ...
Carbon atoms come in different "isotopes" or forms with different masses — carbon-12, carbon-13 and carbon-14 (which you may have heard ...
The Carbon-14 in the textiles places its genesis firmly in the 13th century, and an analysis of trace organic compounds on the relic indicates it ...
“Carbon-14 dating had already told us the most ancient water lies in the deep North Pacific,” said lead author and University of New South ...
Only one of them — carbon-14 — is radioactive. It has a half-life of about 5,730 years. After that period, about half of the carbon-14 atoms in the ...
Technically they aren't batteries but use nuclear waste (Carbon 14) to generate electricity. It would take over 5,000 years of continuous use to ...
Radioactivity, cathode rays, bacteriology. Penicillin, the first antibiotic. Carbon-14 and DNA, thanks to which we now understand the origin of ...
Researchers administered TCC laced with carbon-14 to trace how the contaminant distributed in organ systems of female mice and exposed ...
“Created by cosmic rays hitting Earth's atmosphere, carbon-14 amounts in the tree rings can be correlated with sunspots — the less carbon-14, ...
Researchers administered TCC laced with carbon-14 to trace how the contaminant distributed in organ systems of female mice and exposed ...
The rings also have traces of isotope carbon-14, which can be correlated back to solar activity at the time. Less carbon-14 means more ...
They refer to the 1987 Carbon-14 dating and say, “It's medieval. Science has spoken. That settles it.” But the believers bounce back, and year ...
... letting a series of vest-wearing and white coat-clad “experts” claim that x-rays, CT scans, and DNA and carbon-14 tests of the mummy's flesh ...
But this is a special and rare carbon: carbon-14. Only about one in a trillion carbon atoms qualify as this variety. Most carbon atoms are normal, ...
The accelerator mass spectrometer allows scientists to measure carbon 14, a radioactive isotope that is critical to identifying carbon dioxide ...
The ingredient goes though a carbon tracking technique that looks at carbon 14, an isotope found in plant materials. It is the same principle as ...
The diamond is mostly non-magnetic carbon-14 atoms, …more. "A quantum state is fragile. It's fragile to the magnetic field in particular.
The owner of a Lenexa lab was charged with illegally storing hazardous waste at the business. Ahmed el-Sherif, owner of Beta Chem Laboratory, was indicted Thursday on charges of illegally storing hazardous waste and obstructing an investigation.
Carbon-14 testing of the ship's remains dated the wreck to between 1062 and 1250 A.D., the era when Acre was the last remaining Crusader stronghold in the region.
Thursday's indictment and federal prosecutors did not specify Ahmed el-Sherif's source of isotope Carbon-14 and Radium-226 that he used to process pharmaceutical compounds at his Beta Chem Laboratory in Lenexa, Kansas.
Beta Chem used radioactive Carbon-14 and solvents in the operation, under license by the Kansas Department of Health and Environment (KDHE).
While Georges Kazan and Tom Higham of Oxford University tested some wood fragments from the Lazarus sarcophagus, the Carbon-14 test failed to reveal anything older than a couple of centuries. Whether the testing of ancient bone fragments would have ...
Mountain Crest outhit Carbon, 14-12, but the Dinos only committed two errors to the Mustangs' four. Jace Burbank and Bryar Hall each went 3 for 5 against Carbon, while Creedyn Foulger singled three times and drove in a trio of runs.
A few years after the 1978 study, a carbon-14 test was done on the shroud, that indicated the cloth was made in the 13th century, far too late for it to have been used for Christ's burial.
A cylinder seal is a small cylindrical object with images, words, or both, engraved onto it. Sumerian cylinder seals would be rolled over wet clay to make an impression.
The atmospheric concentration of both carbon-14 and carbon-13 has, as a result, been decreasing in conjunction with the increased emissions of fossil fuels - a phenomenon termed the Suess effect, which has been documented since the 1970s.
Vistas del Coco sounds like the name of a residential complex or one of those condos that real estate agents hope to sell to people dreaming of their own house.
In order for the researchers to make sure that their results are true and reliable, they measured the levels of the carbon14 isotope of the bristlecone pine trees in three different laboratories.
Secured in a private collection since World War II, this foot-tall jizo bosatsu, made from aromatic wood (with traces of gesso, lacquer, paint and gilding), has been verified through careful research, including a Carbon 14 test, to have originated in ...


 

news and opinion


 


 


 


 


schema-root.org

   elements
    carbon
     isotopes
       14

carbon isotopes:
       13
       14