28482-U

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Identification of Δ6-monounsaturated fatty acids in human hair and nail samples by gas-chromatography-mass-spectrometry using ionic-liquid coated capillary column.

Frédéric Destaillats et al.

Journal of chromatography. A, 1218(52), 9384-9389 (2011-11-29)

Lipids found in human sebum contain specific fatty acids such as sapienic (cis-6 16:1), cis-8 18:1 and sebaleic (cis-5, cis-8 18:2) acids. These fatty acids belong to the n-10 series and the initial step involved in their synthesis is the

[Determination of propargite, tebuconazole and bromopropylate pesticide residues in Taiwan green jujubes by gas chromatography-tandem mass spectrometry].

Qun Zhang et al.

Se pu = Chinese journal of chromatography, 32(8), 886-889 (2014-12-02)

An analytical method was established for the determination of propargite, tebuconazole and bromopropylate in Taiwan green jujubes (Zizyphus mauritiana Lam) by gas chromatography-tandem mass spectrometry (GC-MS/MS). The sample was extracted with acetonitrile from the Taiwan green jujubes after treated with

Determination of boron concentration in oilfield water with a microfluidic ion exchange resin instrument.

Cedric F A Floquet et al.

Talanta, 154, 304-311 (2016-05-08)

We developed and validated a microfluidic instrument for interference-free determination of boron in produced water. The instrument uses a boron-specific chelating resin to separate the analyte from its complex matrix. Ten produced water samples were analyzed with the instrument and

The endosomal proteome of macrophage and dendritic cells.

Sophie Duclos et al.

Proteomics, 11(5), 854-864 (2011-02-01)

The essential roles of the endovacuolar system in health and disease call for the development of new tools allowing a better understanding of the complex molecular machinery involved in endocytic processes. We took advantage of the floating properties of small

Multivariate data analysis to characterize gas chromatography columns for dioxin analysis.

Lan Do et al.

Journal of chromatography. A, 1347, 137-145 (2014-05-13)

Principal component analysis (PCA) was applied for evaluating the selectivity of 22 GC columns for which complete retention data were available for the 136 tetra- to octa-chlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs). Because the hepta- and octa-homologues are easy to

Characterisation of capillary ionic liquid columns for gas chromatography-mass spectrometry analysis of fatty acid methyl esters.

Annie Xu Zeng et al.

Analytica chimica acta, 803, 166-173 (2013-11-13)

Due to their distinct chemical properties, the application of ionic liquid (IL) compounds as gas chromatography (GC) stationary phases offer unique GC separation especially in the analysis of geometric and positional fatty acid methyl ester (FAME) isomers. Elution behaviour of

Determination of boron in produced water using the carminic acid assay.

Cedric F A Floquet et al.

Talanta, 150, 240-252 (2016-02-04)

Using the carminic acid assay, we determined the concentration of boron in oilfield waters. We investigated the effect of high concentrations of salts and dissolved metals on the assay performance. The influence of temperature, development time, reagent concentration, and water

Two methods for the separation of monounsaturated octadecenoic acid isomers.

C Villegas et al.

Journal of chromatography. A, 1217(5), 775-784 (2009-12-22)

The identification and quantification of complex mixtures of cis and trans octadecenoic (18:1) fatty acid isomers presents a major challenge for conventional one-dimensional GC/FID analysis of their methyl esters. We have compared the use of two methods to achieve optimized

Microwave-assisted synthesis and antimicrobial evaluation of novel spiroisoquinoline and spiropyrido[4,3-d]pyrimidine derivatives.

Rasha M Faty et al.

Molecules (Basel, Switzerland), 20(2), 1842-1859 (2015-01-28)

Bromination of N-substituted homophthalimides and tetrahydropyrido[4,3-d]- pyrimidine-5,7-diones produces 4,4-dibromohomophthalimide and 8,8-dibromo-tetrahydropyrido[4,3-d]pyrimidine-5,7-dione derivatives, respectively, that can be used as precursors for spiro derivatives. The dibromo derivatives react with different binucleophilic reagents to produce several spiroisoquinoline and spirotetrahydropyrido[4,3-d]- pyrimidine-5,7-dione derivatives, respectively. Reaction

Site-specific DNA-controlled fusion of single lipid vesicles to supported lipid bilayers.

Lisa Simonsson et al.

Chemphyschem : a European journal of chemical physics and physical chemistry, 11(5), 1011-1017 (2010-03-20)

We investigate the Ca(2+)-triggered fusion of lipid vesicles site-selectively tethered to a DNA-modified supported lipid bilayer array, with the DNA strands designed such that hybridization occurs in a zipperlike fashion. Prior to the addition of Ca(2+), which is observed to

Evidence for the Initial Steps of DHA Biohydrogenation by Mixed Ruminal Microorganisms from Sheep Involves Formation of Conjugated Fatty Acids.

Noelia Aldai et al.

Journal of agricultural and food chemistry, 66(4), 842-855 (2018-01-02)

Incubation of DHA with sheep rumen fluid resulted in 80% disappearance in 6 h. The products were analyzed as their fatty acid (FA) methyl esters by GC-FID on SP-2560 and SLB-IL111 columns. The GC-online reduction × GC and GC-MS techniques

Exploiting Conjugated Polyelectrolyte Photophysics toward Monitoring Real-Time Lipid Membrane-Surface Interaction Dynamics at the Single-Particle Level.

Christina F Calver et al.

Langmuir : the ACS journal of surfaces and colloids, 31(43), 11842-11850 (2015-05-09)

Herein we report the real-time observation of the interaction dynamics between cationic liposomes flowing in solution and a surface-immobilized charged scaffolding formed by the deposition of conjugated polyanion poly[5-methoxy-2-(3-sulfopropoxy)-1,4-phenylenevinylene (MPS-PPV) onto 100-nm-diameter SiO2 nanoparticles (NPs). Contact of the freely floating

[Simultaneous determination of five hypertoxic rodenticides in serum by gas chromatography-mass spectrometry].

Huiqiu Huang et al.

Se pu = Chinese journal of chromatography, 33(3), 323-328 (2015-07-18)

A fast analytical method based on gas chromatography-mass spectrometry (GC-MS) was established for the simultaneous determination of tetramine, fluoroacetamide, sodium fluoroacetate, gliftor I and gliftor II in serum. At pH 2.0, sodium fluoroacetate was derivatizated at room temperature for 5

Physiological Status and Community Composition of Microbial Mats of the Ebro Delta, Spain, by Signature Lipid Biomarkers.

Navarrete et al.

Microbial ecology, 39(1), 92-99 (2000-05-03)

Physiological status of microbial mats of the Ebro Delta (Tarragona, Spain) based on the extraction of lipids considered "signature lipid biomarkers" (SLB) from the cell membranes and walls of microorganisms has been analyzed. Data from a day-night cycle show significant

Evaluation of a medium-polarity ionic liquid stationary phase in the analysis of flavor and fragrance compounds.

Carla Ragonese et al.

Analytical chemistry, 83(20), 7947-7954 (2011-09-10)

The present research is focused on the evaluation, in terms of efficiency and polarity, of a recently introduced gas chromatography (GC) column, coated with a 1,12-di(tripropylphosphonium) dodecane bis(trifluoromethansulfonyl) amide ionic-liquid stationary phase (SLB-IL59) and its application to the analysis of

Laboratory validation of an LC-MS/MS method for the detection of ractopamine, clenbuterol and salbutamol in bovine and swine muscle at sub-μg kg

Alfredo M Montes Nino et al.

Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment, 34(5), 785-792 (2017-03-10)

Ractopamine (RAC), is a β-adrenergic agonist increasingly used in the swine and cattle industry. This compound redirects nutrients to favour leanness rather than fat deposition, improves growth and carcass traits gaining higher economic benefit to producers. Countries around the world

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