Dissolved organic matter (DOM) is a complex mixture of molecules that constitutes one of the largest reservoirs of organic matter on Earth. While stable carbon isotope values (delta 13C) provide ...

A giant, gaping hole that opened up in the Sun's atmosphere has been identified as the source of a surprising abundance of a rare isotope of helium. In late October 2023, the Sun was recorded belching ...

Mass spectrometry is an analytical technique used to identify compounds. It involves ionizing molecules, separating the resulting ions based on their mass-to-charge ratio (m/z), and detecting them to ...

Abstract: As to obtain whichever related information about the molecular formula, there are numerous of mass spectrometry applications accessible either web-based or windows-based systems as to ...

As human activities intensify, ecosystems are constantly being polluted by microplastics, which may change the microbe-driven nitrogen cycling and associated nitrous oxide emissions therein. However, ...

The Nature Index 2025 Research Leaders — previously known as Annual Tables — reveal the leading institutions and countries/territories in the natural and health sciences, according to their output in ...

Please note that currently only 13C is implemented as a tracer, and correction can only be done on low resolution LC-/GCMS data.

State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences Beijing, Beijing 100083, China MOE Key Laboratory of Groundwater Circulation and Environment Evolution, ...

ABSTRACT: In the water of numerous thermal and cold springs in the Kalbajar region of Azerbaijan, radioactive radon was determined in different concentrations, and uranium isotopes were found in the ...