They say you are what you eat; that's the case for every living thing, whether it's humans, animals, insects, or plants, thanks to stable isotopes found within.
Ecology
Apr 14, 2021
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29
As the frequency and size of wildfires continues to increase worldwide, new research from Carnegie Mellon University scientists shows how the chemical aging of the particles emitted by these fires can lead to more extensive ...
Earth Sciences
Feb 25, 2021
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365
Australia's wetlands are home to a huge range of stunning flora and fauna, with large snakes often at the top of the food chain.
Plants & Animals
Feb 16, 2021
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7
Coral reefs are beautiful and diverse ecosystems that power the economies of many coastal communities. They're also facing threats that are driving their decline, including the planet's warming waters.
Plants & Animals
Feb 08, 2021
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38
Mass spectrometers are widely used to analyze highly complex chemical and biological mixtures. Skoltech scientists have developed a new version of a mass spectrometer that uses rotation frequencies of ionized molecules in ...
Analytical Chemistry
Jan 28, 2021
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7
Mass spectrometers (MS) have become essential tools in chemistry and biology laboratories. The ability to quickly identify the chemical components in a sample allows them to take part in a diverse array of experiments, including ...
Analytical Chemistry
Jan 19, 2021
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7
Scientists using an instrument aboard NASA's Mars Atmosphere and Volatile EvolutioN, or MAVEN, spacecraft have discovered that water vapor near the surface of the Red Planet is lofted higher into the atmosphere than anyone ...
Space Exploration
Nov 13, 2020
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80
As the global energy market shifts from coal, petroleum fuel, and natural gas to more environmentally friendly primary energy sources, hydrogen is becoming a crucial pillar in the clean energy movement. Developing safe and ...
Condensed Matter
Oct 06, 2020
6
240
Using some cosmic detective work, a team of researchers has found evidence that tiny pieces of asteroids from the inner solar system may have crossed a gap to the outer solar system, a feat once thought to be unlikely.
Space Exploration
Aug 06, 2020
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3226
Insights and technology gleaned from creating a carbon-measuring instrument for Earth climate studies is being leveraged to build another that would remotely profile, for the first time, water vapor up to nine miles above ...
Space Exploration
Aug 06, 2020
0
79
Mass spectrometry (MS) is an analytical technique for the determination of the elemental composition of a sample or molecule. It is also used for elucidating the chemical structures of molecules, such as peptides and other chemical compounds. The MS principle consists of ionizing chemical compounds to generate charged molecules or molecule fragments and measurement of their mass-to-charge ratios. In a typical MS procedure:
MS instruments consist of three modules: an ion source, which can convert gas phase sample molecules into ions (or, in the case of electrospray ionization, move ions that exist in solution into the gas phase); a mass analyzer, which sorts the ions by their masses by applying electromagnetic fields; and a detector, which measures the value of an indicator quantity and thus provides data for calculating the abundances of each ion present. The technique has both qualitative and quantitative uses. These include identifying unknown compounds, determining the isotopic composition of elements in a molecule, and determining the structure of a compound by observing its fragmentation. Other uses include quantifying the amount of a compound in a sample or studying the fundamentals of gas phase ion chemistry (the chemistry of ions and neutrals in a vacuum). MS is now in very common use in analytical laboratories that study physical, chemical, or biological properties of a great variety of compounds.
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