Sentences with phrase «ion mass spectrometry»

A secondary ion mass spectrometry (SIMS) analysis done on the CVD - grown layer using this purified silane precursor showed 29Si concentration less than 0.006 percent, and 30Si less than 0.002 percent, while 28Si concentration was more than 99.992 percent.

In one sentence: Scientists at Pacific Northwest National Laboratory discovered transient species and reaction pathways in a common electrochemical system interface using liquid secondary ion mass spectrometry and a vacuum - compatible electrochemical microfluidic reactor.

My expertise is in microanalysis of involatile materials, both «hard» (minerals, semiconductors, metals) and «soft» (biomaterials) using secondary ion mass spectrometry (SIMS).

Eschewing sole reliance on structural analysis, the team used two different types of chemical analyses: time - of - flight secondary ion mass spectrometry and infrared reflectance spectroscopy.

To determine the structural and chemical composition of the soft tissues Lindgren collected and see if the fossil sea turtle did have a dark colored shell, the researchers subjected the sample to a selection of high - resolution analytical techniques, including field emission gun scanning electron microscopy (FEG - SEM), transmission electron microscopy (TEM), in situ immunohistochemistry, time - of - flight secondary ion mass spectrometry (ToF - SIMS), and infrared (IR) microspectroscopy.

When the team bombarded the fossils with charged particles and then analyzed the particles that were knocked from the surface (a technique called time - of - flight secondary ion mass spectrometry), they chemically identified the remnants of eumelanin, a pigment that typically lends a black or brown color to skin or feathers.

Not exact matches

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

A new way of making ions could revolutionize the venerable practice of mass spectrometry, in which ionized molecules are identified by their weight.

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.

We used Fourier - transform ion cyclotron resonance mass spectrometry and nuclear magnetic resonance spectroscopy to show that a sulfilimine bond -LRB-- S = N --RRB- crosslinks hydroxylysine - 211 and methionine - 93 of adjoining protomers, a bond not previously found in biomolecules.

To identify and structurally characterize biomolecules from complex samples, we perform rapid (µs - ms) two - dimensional gas - phase separations using ion mobility - mass spectrometry (IM - MS) techniques.

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

By integrating the ion mobility and mass spectrometry approaches, the team developed an instrument capable of performing rapid, ultrasensitive analyses of extremely complex materials and of separating, identifying, and characterizing species indistinguishable by mass spectrometry alone.

CoMet integrates two complementary analysis techniques — multiplexed ion mobility spectrometry (IMS) and ultrafast quadrupole time - of - flight mass spectrometry — within a single instrument.

Grant joined PNNL in 2010 as the inaugural Linus Pauling distinguished postdoctoral fellow and started investigating catalytically relevant processes using ion soft landing and highly sensitive mass spectrometry.

Soft - landing of mass selected ions on surfaces allows us to explore fundamental aspects of ion - surface interactions relevant to a broad range of scientific disciplines including biology, materials science, mass spectrometry, imaging and spectroscopy.

For the study, Hill compared brain tissue from normal and Parkinson's - like rats using ion mobility — mass spectrometry (IMMS), a process that analyzes both the weight and speed of chemical molecules.

Fundamental aspects of activation and dissociation of complex molecular ions in tandem mass spectrometry.

Ion activation and dissociation constitute the scientific basis underlying tandem mass spectrometry, one of the most important analytical methods developed in the last century.

In the scientific community, Dr. Laskin is internationally known for her work on gas - phase ion chemistry and mass spectrometry of large, complex molecules.

His intuitive habit of seeking the next important means for advancing mass spectrometry — ion optics, reaction kinetics, ion - molecule reactions, analytical chemistry — led Futrell to create 20 new mass spectrometers, either via major overhauls of commercially available models or from ground - up designs, including the key invention of tandem mass spectrometers.

This includes a new ion mobility spectrometry - mass spectrometry platform and ultrasensitive nanoelectrospray ion source with MS interface.

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.

Methods included mass spectrometry (ICPMS), ion - exchange column chromatography, gas chromatography, Raman spectroscopy, scanning electron microscopy, laser ablation, and laser fluorination.