Find the molecular weight by identifying the molecular ion (nominal mass, monoisotopic peak). From the molecular weight, determine whether the molecule contains an odd number of nitrogens. The isotope ...

Severed heads were a unique funerary practice within the Iberian world and represent an exceptional opportunity to analyze ...

Groundwater is water stored beneath the Earth's surface in the spaces between rocks and sediments, collectively known as aquifers.

In the study, NiCo-LDH flakes were deposited on highly ordered pyrolytic graphite (HOPG) substrates and immersed in an ...

In this video, Fran Scott demonstrates how to test for various ions and interpret the results. Flame tests and chemical tests are used to detect and identify ions in samples. Instrumental methods ...

This data set includes chemistry, ion, and istotope data from Taylor Dome, part of the East Antarctic ice sheet. Deep drilling at Taylor Dome successfully reached bedrock at a depth of 554 meters ...

Water expands and increases in volume as it warms. Cold fresh water does not sink in salt water. Water molecules with sodium and chloride ions mixed among them have more matter in a given volume and ...

preserving cell function while effectively monitoring mercury ions. Beyond mercury detection, these nanocrystals could also play a pivotal role in identifying other toxic metals in biological ...

Copyright 2025 The Associated Press. All Rights Reserved. Senators on Capitol Hill are weighing in on Elon Musk’s moves at the US Agency for International ...