Sentences with phrase «ionization mass»

The Aerosol Chemical Speciation Monitor is a thermal vaporization, electron impact, ionization mass spectrometer that measures bulk chemical composition of the rapidly evaporating component of sub-micron aerosol particles in real time.

Our labs include facilities for: electronics prototyping, development and test; optical system test and integration; radiation spectroscopy instrumentation; and laser ablation resonance ionization mass spectrometry.

Moini, M., Jones, B. L., Rogers, R. M. & Jiang, L. Sodium trifluoroacetate as a tune / calibration compound for positive - and negative - ion electrospray ionization mass spectrometry in the mass range of 100 — 4000 Da.

Minimally invasive monitoring of cellulose degradation by desorption electrospray ionization and laser ablation electrospray ionization mass spectrometry.

He has developed or modified instruments for specialized research, creating high - pressure and chemical - ionization mass spectrometers.

His work often focuses on developing or modifying instrumentation for specialized research purposes, including high - pressure and chemical - ionization mass spectrometers.

Two - dimensional polyacrylamide gel electrophoresis combined with chromatographic phosphoprotein pre-enrichment and electrospray ionization mass spectrometry - based protein identification was used to reveal changes of phosphoproteins in cells exposed to cyclic stretching.

To identify the main compounds (metabolites) produced by glioblastoma cells during infection by Zika, the researchers analyzed the cells using matrix - assisted laser desorption / ionization mass spectrometry imaging (MALDI - MSI).

Recently, the PolyU research team adopts the direct ionization mass spectrometry (DI - MS) method to detect the major active components of Lingzhi (ganoderic acids) and Tianma (gastrodin, parishin B / parishin C / and parishin).

The tool, known as DESI mass spectrometry imaging (or Desorption ElectroSpray Ionization mass spectrometry imaging), works by turning molecules into electrically charged versions of themselves, called ions, so that they can be identified by their mass.

Rapid in - situ or in - packaging solutions may be supplemented with other rapid technologies such as rapid evaporative ionization mass spectrometry and desorption electrospray ionisation.58

Not exact matches

and masses of material to exist to be in the big bang; masses comprised to atoms and neutrons and protrons and «laws» related to ions and ionization,... and life..

Deuterium enrichment profile of Golden Rice β - carotene analyzed by liquid chromatography / atmospheric pressure chemical ionization - mass spectrometry (positive ion mode).

The fractions containing retinol in the HPLC eluent were collected individually and derivatized for gas chromatography / electron capture negative chemical ionization — mass spectrometry (GC / ECNCI - MS)(21) to measure retinol enrichment from the reference vitamin A dose (Mretinol + 10 = m / z 278) or Golden Rice β - carotene (Mretinol + 5 = m / z 273) dose.

For Golden Rice β - carotene, analysis of serum samples by liquid chromatography / atmospheric pressure chemical ionization - mass spectrometry (23) showed that the labeled β - carotene was absorbed intact after consumption of the cooked Golden Rice.

With this labeling method, the intrinsically labeled Golden Rice β - carotene showed a protonated molecule of m / z of Mβc + H + = 536 + 1 (representing unlabeled β - carotene) and a range of isotopomers with the most abundant showing an enrichment of 9 deuterium at Menrich - βc = Mβc + H + + 9 mass units (Figure 4) as analyzed by using the liquid chromatography / mass spectrometry with a positive atmospheric pressure chemical ionization interface (the total m / z was Mβc + 9 + H + = 536 + 9 + 1 = m / z 546)(23).

The method used to measure the neutral clusters utilizes a combination of a mass spectrometer and a chemical ionization source, which was developed by the University of Frankfurt and the University of Helsinki.

A proposal we had co-authored with Chet Spicer (Battelle, Columbus, Ohio) to directly measure gaseous halogen concentrations by using atmospheric pressure chemical ionization (APCI) mass spectrometry in the early arctic spring was gratuitously funded at the eleventh hour, and Finlayson - Pitts asked me to participate in the field work despite the fact that I had no previous experience in field research.

The process involving liquid chromatography - electrospray ionization - tandem mass spectrometry relies on a vital step called «charge derivatization» or using a permanently charged reagent to selectively trap the estrogens and isolate them from the lipids and proteins that could interfere with estrogen detection, Schug said.

By directly applying a high voltage on a small piece of raw sample with its surface loaded with solvents, spray ionization could be induced at the tip of the sample to generate corresponding mass spectra within minutes, as if they are fingerprints which helps identification.

The ionization increases, the astronomers say, near black holes that are swallowing up matter at a higher rate relative to their mass, which creates more radiation capable of stripping away electrons.

The team used a nanoflow liquid chromatography instrument to sort the molecules in the meteorite sample, then applied nanoelectrospray ionization to give the molecules an electric charge and deliver them to a high - resolution mass spectrometer instrument, which identified the molecules based on their mass.

The technique consists of breaking down the atoms or molecules in a sample so that they become charged with more or fewer electrons than the original (ionization) and then separating them by mass / charge ratio in order to identify and quantify them.

This powerful analytical method using mass spectrometric detection is called CI - APi - TOF (chemical ionization — atmospheric pressure interface time - of - flight mass spectrometry).

His research has answered many important fundamental questions about mass spectrometry, including detailed mechanisms of ionization, excitation, and dissociation of ions.

Liquid chromatography mass spectrometry (LCMS) was carried out using a Shimadzu LC - 20AD spectrometer at The Scripps Research Institute (La Jolla, CA, USA), and electrospray ionization (ESI) mass analysis with a Thermo Scientific LTQ Orbitrap - XL spectrometer at the Salk Institute.

Using our deep scientific and engineering expertise, we develop a broad portfolio of chemist - centric, purpose - built mass spectrometers, nanoelectrospray ionization sources, flow - chemistry synthesis systems and consumables characterized by their reliability, high quality and flexibility.

The most broadly useful methods for chemical and biochemical samples use electrospray ionization - mass spectrometry (ESI - MS).

Roach received his Ph.D. in 2009, shortly before joining PNNL to work in developing EMSL's desorption electrospray ionization (DESI) mass spectrometry facility for application to study aerosol chemistry.

I updated this in November 2016 to reflect the changes to the IB syllabus, but there are some bits missing, notably mass spectra, calculations for electron transitions and some more detail on ionization energies.

Novel platforms, such as PCR - based electron spray ionization - time - of - flight - mass spectrometry

IP25, tri-unsaturated HBI (HBI - III, Z - isomere41), and sterols were analyzed by gas chromatography (GC) using an Agilent Technologies 7890B (30 m DB - 1MS column, 0.25 mm i.d., 0.25 µm film thickness) coupled to an Agilent Technologies 5977A Extractor mass selective detector (MSD, 70 eV constant ionization potential, Scan 50 — 550 m / z, 1 scan / s, ion source temperature 230 °C, Performance Turbo Pump).

Strontium isotope ratios can be measured at the delta ppm level using a medium to high resolution magnetic sector mass spectrometer with multiple fixed collectors and either thermal ionization or inductively coupled plasma as an ion source.