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News articles about "Isotopes"

Looking back into the past of oceans: Acidification trends, seasonal fluctuations

Next to global warming ocean acidification is currently considered as the second major carbon dioxide problem With the increase of carbon dioxide CO2 in the atmosphere larger quantities of the gas are getting into the ... - Read More

Getting a grip on exotic atomic nuclei

A new model describing atomic nuclei proposed by a physicist from the University of Warsaw Faculty of Physics more accurately predicts the properties of various exotic isotopes that are created in supernova explosions or inside ... - Read More

Classical nova explosions are major lithium factories in the universe

A team of astronomers from National Astronomical Observatory of Japan NAOJ Osaka Kyoiku University Nagoya University and Kyoto Sangyo University observed Nova Delphini 2013 which occurred on August 14 2013. Using the 8.2 meter Subaru ... - Read More

Novel radioguided brain surgery technique could help pinpoint cancerous tissue

Radioguided surgery RGS allows the surgeon to evaluate the completeness of a tumor resection while minimizing the amount of healthy tissue removed During the procedure a surgeon is provided with vital and real time information ... - Read More

Voyage from Earth's crust to its mantle and back again

Uranium isotopes leave a distinct 'fingerprint' in the sources of volcanic rocks making it possible to gauge their age and origin Geologists have gained a new understanding of how Earth's crust is recycled back into ... - Read More

Chemical analysis of ancient rocks reveals earliest record yet of Earth's atmosphere: Isotopic memory of atmospheric persistence

Chemical analysis of some of the world's oldest rocks by an international team led by McGill University researchers has provided the earliest record yet of Earth's atmosphere The results show that the air 4 billion ... - Read More

New planetary dashboard shows 'great acceleration' in human activity since 1950

Human activity predominantly the global economic system is now the prime driver of change in the Earth System the sum of our planet's interacting physical chemical biological and human processes according to a set of ... - Read More

Ammonium source in open ocean tracked by researchers

To understand the extent to which human activities are polluting Earth's atmosphere and oceans it's important to distinguish human made pollutants from compounds that occur naturally A recent study co authored by a Brown University ... - Read More

Extremely high-resolution magnetic resonance imaging

For the first time researchers have succeeded to detect a single hydrogen atom using magnetic resonance imaging which signifies a huge increase in the technology's spatial resolution In the future single atom MRI could be ... - Read More

Journey to the center of the Earth: Geochemist uses helium and lead isotopes to gain insight into makeup of planet’s deep interior

A UC Santa Barbara geochemist studying Samoan volcanoes has found evidence of the planet's early formation still trapped inside the Earth Known as hotspots volcanic island chains such as Samoa can ancient primordial signatures from ... - Read More

Method for detecting extremely rare inert gas isotopes for water dating

In the earth and environmental sciences radioactive isotopes atom variants that decay over time play a major role in age determination A radioactive isotope of the inert gas argon 39Ar for example is used to ... - Read More

High Flux Isotope Reactor Named Nuclear Historic Landmark

The High Flux Isotope Reactor or HFIR now in its 48th year of providing neutrons for research and isotope production at the Department of Energy's Oak Ridge National Laboratory has been designated a Nuclear Historic ... - Read More

Astrophysicists to probe how early universe made chemical elements

In the beginning all was hydrogen and helium plus a bit of lithium Three elements in all Today's universe however has nearly a hundred naturally occurring elements with thousands of variants isotopes and more likely ... - Read More

Discrepancy in Greenland temperatures during end of last ice age resolved

A new study of three ice cores from Greenland documents the warming of the large ice sheet at the end of the last ice age resolving a long standing paradox over when that warming occurred ... - Read More

Ironing out details of the carbon cycle: Dissolved iron in North Atlantic traced to Sahara desert

Iron is present in tiny concentrations in seawater On the order of a few billionths of a gram in a liter I did a calculation once on a ton of ocean water says Seth John ... - Read More

Ancient Arctic sharks tolerated brackish water 50 million years ago

Sharks were a tolerant bunch some 50 million years ago cruising an Arctic Ocean that contained about the same percentage of freshwater as Louisiana's Lake Ponchatrain does today says a new study involving the University ... - Read More

Team develops a geothermometer for methane formation

Methane is a simple molecule consisting of just one carbon atom bound to four hydrogen atoms But that simplicity belies the complex role the molecule plays on Earth it is an important greenhouse gas is ... - Read More

Modern ocean acidification is outpacing ancient upheaval: Rate may be ten times faster

Some 56 million years ago a massive pulse of carbon dioxide into the atmosphere sent global temperatures soaring In the oceans carbonate sediments dissolved some organisms went extinct and others evolved Scientists have long suspected ... - Read More

Richest marine reptile fossil bed along Africa's South Atlantic coast is dated at 71.5 mya

A new study uses carbon isotope dating to determine the first precise age for this bed and ties the western coast of Africa to 30 million years of global geologic records Paleontologists at Southern Methodist ... - Read More

Approaching the island of stability: Observation of the superheavy element 117

The periodic table of the elements is to get crowded towards its heaviest members Evidence for the artificial creation of element 117 has recently been obtained at the GSI Helmholtz Centre for Heavy Ion Research ... - Read More
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