Sentences with phrase «tandem mass»

Measuring steroid hormones via urine testing using both gas chromatography - mass spectrometry (GS - MS) or liquid chromatography - tandem mass spectrometry (LC - MS / MS) has been shown to produce highly accurate results, but radioimmunoassay (RIA) and enzyme - linked immunosorbent assay (ELISA, also known as enzyme immunoassay [EIA]-RRB- analysis may not be accurate.

Liquid chromatography - tandem mass spectrometry applications in endocrinology..

Comparison of liquid chromatography - tandem mass spectrometry, RIA, and ELISA methods for measurement of urinary estrogens..

Quantitative measurement of endogenous estrogens and estrogen metabolites in human serum * by liquid chromatography - tandem mass spectrometry.

Additionally, DHT, which is very difficult to measure in any medium, is most accurately measured in serum using high - performance liquid chromatography - tandem mass spectrometry (LC - MS / MS).5, 6

As discussed in Part II of this review, urine hormone testing using both gas chromatography - mass spectrometry (GS - MS) or liquid chromatography - tandem mass spectrometry (LC - MS / MS) is well - established in the medical literature as a reliable method of assessing levels of active (free & conjugated) hormones and their metabolites, correlates well with patient symptoms, and reflects the beneficial impact (or lack of benefit and potentially oncogenic effect) of therapeutic interventions.43, 444 Radioimmunoassay (RIA) and enzyme - linked immunosorbent assay (ELISA, also known as enzyme immunoassay [EIA]-RRB- analysis may not be accurate.

Proteomic datasets were obtained using liquid chromatography tandem mass spectrometry (LC - MS / MS).

Nanoelectrospray tandem mass spectrometry and sequence similarity searching for identification of proteins from organisms with unknown genomes.

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.

Liquid chromatography tandem mass spectrometry (LC - MS / MS) is often the technique of choice for characterizing GPIs.

MS / MS refers to a newer technique called tandem mass spectrometry, an even more powerful method of determining chemical structures.

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

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

A fast and sensitive method involving ultra ‐ performance liquid chromatography — tandem mass spectrometry has been introduced to detect the mycotoxin citrinin in dried orange peel.

Two - dimensional liquid chromatography - tandem mass spectrometry coupled with isobaric tags for relative and absolute quantification (iTRAQ) labeling approach revealed first proteome profiles of pulmonary alveolar macrophages infected with porcine reproductive and respiratory syndrome virus.

Separating the wheat from the chaff: unbiased filtering of background tandem mass spectra improves protein identification.

They used liquid chromatography and tandem mass spectroscopy to identify proteins in the complex.

Magno Junqueira (Shevchenko, MPG)-- «Systematic characterization of mammalian protein complexes by shotgun liquid chromatography tandem mass spectrometry» (2009)

His invention of tandem mass spectrometry is deployed in nearly every commercial mass spectrometer.

Simultaneous quantitative determination of 5 - aza - 2 ′ - deoxycytidine genomic incorporation and DNA demethylation by liquid chromatography tandem mass spectrometry as exposure - response measures of nucleoside analog DNA methyltransferase inhibitors.

Liquid chromatography on - line tandem mass spectrometry (LC / MS / MS) is the method of choice for small molecule quantitation because it provides accurate, reliable and consistent data and requires fewer specimens.

An integrated microfluidics tandem mass spectrometry system for automated protein analysis.

To begin with, metabolite samples to be analysed undergo a so - called tandem mass spectrometry run.

Now it's a little more than a decade later, and tandem mass spectrometry has brought a sea change in California's newborn screening program.

Vexing to doctors, the great majority of positive results are false, not because the tandem mass spec or the other assays have made errors but because certain babies are «borderline normal.»

His was one of 12 cases of MCADD detected during the first year of California's experiment with tandem mass spec.

He is therefore enthusiastic about tandem mass spec, although it does not survey human DNA directly.

Austen's life may have been saved by a system known as tandem mass spectrometry.

A condition called maple syrup urine disorder, which tandem mass spec can flag, has an incidence of about one in 183,000 births.

The program that caught Austen Muelder's disease is still preliminary: There is no guarantee that tandem mass spec will be made available to all of the 540,000 babies born each year in the state.

The basic technique of tandem mass spectrometry is more than a century old, but it was adapted to newborn screening about a decade ago by North Carolina and Pennsylvania.

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.

An ultra-performance liquid chromatography tandem mass spectrometry (UPLC - MS / MS) quantification method for glucocorticoids in fish scales was developed in an EN ISO / IEC 17025 regulated environment and validated according the requirements of the Commission Decision No. 2002 / 657 / EC.

The researchers used high end mass spectrometry, so - called tandem mass spectrometry, to compare the composition of the complex mixtures of natural products secreted into the media and to detect individual components some of which are present only at low quantities.

Shen, Y., Han, C., Zhou, X., Chen, X., Huang, F., Zhu, Z., «Microwave - assisted extraction and determination of dicyandiamide residue in infant formula samples by liquid chromatography - tandem mass spectrometry», Journal of Dairy Science, 96 (11), 6877 - 6882, Nov 2013.

Effects of conventional heating on the stability of major olive oil phenolic compounds by tandem mass spectrometry and isotope dilution assay.

Not exact matches

The carmaker realized that if its vision of battery - powered electric vehicles gaining mass appeal in tandem with fuel cell electrics was to come true, it needed to so something about the lack of hydrogen infrastructure.

IGF prevents frailty by increasing skeletal muscle mass (sarcopenia), sex drive (infertility), brain thymus (immunosenescence, centenarians maintain a strong immune system), skeletal bone mineralization and marrow stem cell formation (osteoporosis and immune system by bone marrow immune cells working in tandem with thymus and lymphs nodes), I understand that diabetes, an accelerated aging phenotype, is insulin IGF and blood glucose driven.

Here we use a metabolic labelling approach to achieve rapid generation of bio-isotopologues of the complete Caenorhabditis elegans transcriptome and its modifications and use them as reference standards to characterise the RNA modification profile in this multicellular organism through an untargeted liquid - chromatography tandem high - resolution mass spectrometry (LC - HRMS) approach.

This essay is an attempt to link real world observations (the failure of surface temperatures to rise in tandem with atmospheric CO2) to basic physics and thereby show why the radiative characteristics of Greenhouse Gases can not increase the surface temperature of a planet when atmospheric mass, the strength of the gravitational field and the power of insolation at the top of the atmosphere remain the same.

Having recovered from its crash to $ 5,900 to currently trade around $ 10,400, Bitcoin has welcomed mass industry adoption of SegWit — coming in tandem with rock - bottom transaction fees and improved processing times.