Sep 22, 2025
A characteristic ion at [M-116] + (m/z = 180 in this instance), together with homologous ions at 166, 152, etc., are also diagnostic. That at [M‑116] + is
Aug 03, 2025
In the present investigation tumor cells of the human colon cancer cell line HCT-116 wt and HCT-116 wt transfected with the green fluorescent protein (HCT-116 wt/GFP) were grown as
Mar 25, 2026
We report on a new 3-D spheroid cell culture system aimed to mimic the properties of solid tumors in vivo. The colon cancer cell lines HCT-116 wt and HCT-116 wt/GFP were grown as monolayers and
Sep 16, 2025
Alcohol An alcohol''s molecular ion is small or non-existent. Cleavage of the C-C bond next to the oxygen usually occurs. A loss of H 2 O may occur as in the
Sep 01, 2025
Worked Example 12.1: Using Mass Spectra to Identify Compounds Assume that you have two unlabeled samples, one of methylcyclohexane and the other of
Jul 23, 2025
The Data Dependent Neutral Loss functionality is available on all LTQ series and Thermo Scientific LCQ Deca XPTM Series ion trap mass spectrometers with XcaliburTM1.4 and above software versions.
Mar 04, 2026
The light passed through the single slit 114a in this manner is guided to the spectroscope 116 as collimated light by an optical action of the collimator 115 and each parallel beam is dispersed into
Jan 04, 2026
Rapid Communications in Mass Spectrometry is a mass spectrometry journal devoted to the rapid publication of original research.
Sep 09, 2025
The ionization edges encoded in the electron energy loss spectroscopy (EELS) spectra enable advanced material analysis including composition analyses and elemental quantifications.
Mar 12, 2026
Expand/collapse global hierarchy Home Campus Bookshelves University of California Davis Chemistry 219 - Heffern 2: Mass Spectrometry 2.6:
Aug 31, 2025
Collision-induced dissociation tandem mass spectrometry offers to resolve molecular structures through library searches, however, for de novo identifications, one must often rely on in
Feb 01, 2026
While the long-chain wax esters (spectra discussed on a separate web page) can be major lipid components of plant and animal tissues, simple alkyl esters (ethyl,
Feb 10, 2026
Structural characterization of natural products in complex herbal extracts remains a major challenge in phytochemical analysis. In this study, we
Sep 19, 2025
Monitoring Spectrometer (GEMS) (Choi et al., 2018; Kim et al., 2020), which was launched on February 18, 2020 (UTC), nitoring of Polluti (TEMPO) (Zoogman et al., 2017) and Sentinel-4 platforms, to
Mar 19, 2026
how (remarkably) we get peptide and protein molecular ions into gas phase the importance of isotopes in mass spectrometry how we measure the m/z values of the ions We also talked about: how to
Nov 03, 2025
The particles in the sample (atoms or molecules) bombarded by the stream of energetic electrons leading to the loss of one or more electrons from the sample particles to make positive ions.
Sep 07, 2025
A streamlined platform for accessing astrophysics data and research resources.
Jun 05, 2026
Mass spectrometry is a destructive method used to measure molecular weight and provide data on molecular structure; it differs from the other methods
Jun 08, 2026
Mass spectrometry imaging has been performed by using a range of various ionization techniques coupled with different types of mass spectrometers. After decades of development, from
Sep 09, 2025
1. Mass spectrometry Mass spectrometry in some form is familiar to many people whose chemistry education has gone beyond compulsory education.
Nov 26, 2025
These incidents resulted in major social and environmental impacts, such as destruction of 46 public and private structures; cultural changes in communities with the loss of intangible heritage...
Apr 13, 2026
Long-term exposures to environmental toxicants and endogenous electrophiles are causative factors for human diseases including cancer. DNA adducts reflect the internal exposure to
Mar 09, 2026
Adductomics studies are used for the detection and characterization of various chemical modifications (adducts) of nucleic acids and proteins. The advancements in liquid chromatography
Sep 21, 2025
Mass Spectrometry 1. The Mass Spectrometer In order to measure the characteristics of individual molecules, a mass spectrometer converts them to ions so that they can be moved about and
Oct 03, 2025
the ions of mass m are deviated by a magnetic field such that ions of low or high m/z value strike the sides of the spectrometer, but ions of one particular m/z value continue along the spectrometer body;
Sep 27, 2025
Clinically relevant in vitro methods are needed to identify new cancer drugs for solid tumors. We report on a new 3-D spheroid cell culture system aimed to mimic the properties of solid
Oct 29, 2025
Grahn P, Kuula J. Finite Element Simulation of Aerosol Particle Trajectories in a Cantilever-Enhanced Photoacoustic Spectrometer for
Jan 17, 2026
The combination of multi-stage mass spectrometry (MSn), accurate mass measurements with high-resolution mass spectrometry (HRMS), isotopic labeling and gas-phase infrared ion
May 29, 2026
A microchannel-plate based resistive-anode position sensitive detection system is applied to a high-resolution fast electron energy loss spectrometer. The biasing voltage divider network for
Jul 25, 2025
A proposal is derived for the formation and structure of the [M''+ H - NO2 "O2 ]+• ion, which explains the experimental observations, and which is the main fragment ion in these spectra. The fragment
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