Scientists have recreated the reaction by which carbon isotopes made their way into different organic compounds, challenging the notion that organic compounds, such as amino acids, were formed by isotopically enriched substrates. ...
Astrobiology
Apr 29, 2021
0
27
Position-specific isotope analysis (PSIA) is a technique that measures the isotope composition of a certain position in a molecule. It can provide valuable information of the formation mechanisms of a molecule.
Analytical Chemistry
Jan 25, 2021
0
9
Millions of ibis and birds of prey mummies, sacrificed to the Egyptian gods Horus, Ra or Thoth, have been discovered in the necropolises of the Nile Valley. Such a quantity of mummified birds raises the question of their ...
Archaeology
Sep 22, 2020
0
238
A new study published this week in the journal Proceedings of the National Academy of Sciences documents dietary shifts in herbivores that lived between 1-3 million years ago in Ethiopia's Lower Omo Valley. The research team, ...
Archaeology
Aug 25, 2020
0
602
The oxidation of Earth's early atmosphere and ocean played an important role in the evolution of life. Reconstructing the paleo-redox conditions is crucial for the understanding of the coevolution of life and environment. ...
Earth Sciences
May 15, 2020
0
4
Nitrogen makes up approximately 78% of the air we breathe. But scientists have never fully understood how it came to be present in the atmospheres around Earth and other planets.
Earth Sciences
Apr 21, 2020
0
22
The hydrogen isotopic composition of sedimentary n-alkanes can be used to study paleoclimate, organic matter sources and petroleum genesis. However, the hydrogen isotopic composition of sedimentary n-alkanes is affected by ...
Materials Science
Apr 9, 2020
0
4
Scientists at The University of New Mexico have found that the Earth and Moon have distinct oxygen compositions and are not identical in oxygen as previously thought according to a new study released today in Nature Geoscience.
Space Exploration
Mar 10, 2020
23
662
Until recently, the analysis and identification of nuclear fuel pellets in nuclear forensics investigations have been mainly focused on macroscopic characteristics, such as fuel pellet dimensions, uranium enrichment and other ...
Analytical Chemistry
Aug 30, 2019
0
69
A new review of silicon cycling in glacial environments, led by scientists from the University of Bristol, highlights the potential importance of glaciers in exporting silicon to downstream ecosystems.
Earth Sciences
Aug 14, 2019
0
82
