Flies, mosquitoes, dust and even microplastics—spider webs capture whatever travels through the air. Researchers at the university have now for the first time tested if they can get an overview of plastic particles in the ...
Earth Sciences
Jun 02, 2022
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74
Over the past few decades, tiny pieces of plastic have found their way, via the air, to remote places on Earth. This is the worrying conclusion drawn by researchers from Utrecht University and other institutes published in ...
Environment
May 06, 2022
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59
Scientists have demonstrated the effectiveness of an innovative nuclear mass measurement method using the rare-RI ring (R3) facility at the Radioactive Isotope Beam Factory, and applied it to the mass measurement of a neutron-rich ...
General Physics
Apr 25, 2022
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7
In a new study at University of California, Irvine, researchers have revealed the impact of native lipids on rhodopsin signaling and regeneration, which may usher in a new paradigm for discovery of drugs that target G protein-coupled ...
Cell & Microbiology
Apr 07, 2022
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48
Researchers at the School of Science at IUPUI have found that blow flies can be used as chemical sensors, with a particular focus on the detection of chemical warfare agents.
Biochemistry
Mar 24, 2022
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48
PFAS, a family of thousands of human-made chemicals, are everywhere, and some of them are known to be harmful for our bodies and the environment. Even more frightening is how little we know about these pervasive pollutants ...
Analytical Chemistry
Feb 02, 2022
0
54
Short for Venus Mass Spectrometer, VMS is one of five instruments aboard the DAVINCI descent probe. Launching in 2029, DAVINCI will be the first US probe mission to enter Venus' atmosphere in over 40 years. The goal of the ...
Space Exploration
Nov 10, 2021
0
171
Proteomics produces enormous amounts of data, which can be very complex to analyze and interpret. The free software platform MaxQuant has proven to be invaluable for data analysis of shotgun proteomics over the past decade. ...
Biotechnology
Jul 12, 2021
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9
As analytical instrumentation (gas- and liquid-chromatographs coupled with mass spectrometers) increase in sensitivity and speed, forensic scientists may find themselves still hindered by the process of preparing samples ...
Analytical Chemistry
Jul 08, 2021
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5
The climate of ancient Earth left telltale signs in the geochemical record. On the basis of chemical properties of carbonate minerals, scientists can calculate a site's temperature hundreds of millions of years ago. Such ...
Analytical Chemistry
Jun 02, 2021
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5
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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