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Showing 1-30 of 69 results for "164194" within Papers
Johannis P Kamerling et al.
Methods in molecular biology (Clifton, N.J.), 347, 69-91 (2006-10-31)
Over the years several methodologies have been developed for the structural analysis of naturally occurring sialic acids (Sias), a family with more than 62 members. Currently there are two primary instrumental approaches: analysis of volatile Sia derivatives by gas-liquid chromatography
Yan He et al.
Journal of chromatography. A, 1408, 261-266 (2015-07-22)
This paper describes the use of an anionic ion-pair reagent (IPR) to impove the ultraviolet (UV) detection and hydrophobic retention of polar and UV transparent cations. Anionic IPR added to the mobile phase forms an ion-pair with cations. Formation of
PĆ©ter Jankovics et al.
Journal of pharmaceutical and biomedical analysis, 112, 155-168 (2015-01-01)
The analysis of highly polar (often charged) compounds which lack a strong UV absorbing chromophore is really challenging. Despite the numerous analytical methods published, the demand for a simple, robust and cheap technique for their analysis still persists. Here, reversed
Huilun Chen et al.
International journal of environmental research and public health, 17(4) (2020-02-23)
Perfluoroalkyl carboxylic acids (PFCAs) are some of the most significant pollutants in human serum, and are reported to be potentially toxic to humans. In this study, the binding mechanism of PFCAs with different carbon lengths to human serum albumin (HSA)
Karine Meisser Redeuil et al.
Journal of chromatography. A, 1422, 89-98 (2015-11-03)
This manuscript reports a validated analytical approach for the quantification of 21 water soluble vitamins and their main circulating forms in human plasma. Isotope dilution-based sample preparation consisted of protein precipitation using acidic methanol enriched with stable isotope labelled internal
Francisca PĆ©rez et al.
Environment international, 59, 354-362 (2013-07-31)
Perfluoroalkyl substances (PFASs) are environmental pollutants with an important bioaccumulation potential. However, their metabolism and distribution in humans are not well studied. In this study, the concentrations of 21 PFASs were analyzed in 99 samples of autopsy tissues (brain, liver
Helena ZahradnĆckovĆ” et al.
Journal of separation science, 32(22), 3919-3924 (2009-10-21)
Heptafluorobutyl chloroformate (HFBCF), a recently introduced derivatization reagent, was examined in enantioseparation of amino acids (AAs) by GC. Twenty proteinogenic AAs, plus ornithine, cystine and 4-fluorophenylalanine (internal standard) were treated with the reagent and separation properties of the derivatives were
Valerii I Fedchenko et al.
International journal of biological macromolecules, 78, 347-353 (2015-04-26)
Renalase is a recently discovered secretory protein involved in the regulation of blood pressure. Cells synthesize all known isoforms of human renalase (1 and 2) as flavoproteins. Accommodation of FAD in the renalase protein requires the presence of its N-terminal
V Gellrich et al.
Chemosphere, 87(9), 1052-1056 (2012-03-07)
Perfluorinated compounds (PFCs) can be detected worldwide in both, soil and water. In order to study the leaching behavior of this heterogeneous group of compounds in soil, flow-through column experiments have been conducted. Ten perfluoro carboxylates and four perfluoro sulfonates
Toshio Takayanagi et al.
Talanta, 74(5), 1224-1230 (2008-03-29)
Perfluorinated surfactants of heptafluorobutylate and pentadecafluorooctanoate ions were adsorbed on an activated charcoal cartridge and decomposed with sodium biphenyl (SBP) reagent to form inorganic fluoride ion. The fluoride ion thus formed was determined by flow injection analysis (FIA) using quercetin-Zr
Kaberi P Das et al.
Toxicological sciences : an official journal of the Society of Toxicology, 105(1), 173-181 (2008-05-31)
Perfluorobutyrate (PFBA) is a perfluoroalkyl acid (PFAA) found in the environment. Previous studies have indicated developmental toxicity of PFAAs (perfluorooctane sulfonate [PFOS] and perfluorooctanoate [PFOA]); the current study examines that of PFBA. PFBA/NH4(+) was given to timed-pregnant CD-1 mice by
Andrej Frolov et al.
Analytical and bioanalytical chemistry, 392(6), 1209-1214 (2008-09-25)
Glycation is a common class of nonenzymatic posttranslational modifications relevant for several diseases and cell aging in general, such as D: -glucose-derived modifications at the epsilon-amino groups of lysine residues in blood proteins, especially albumin, immunoglobulin, and hemoglobin, for diabetic
Yun Chen et al.
Journal of hazardous materials, 408, 124815-124815 (2020-12-29)
Layered double hydroxide (LDH) with the metal composition of Cu(II)Mg(II)Fe(III) was prepared as an adsorbent for fast adsorption of perfluorooctane sulfonate (PFOS) and perfluorooctanoate (PFOA). 84% of PFOS and 48% of PFOA in relation to the equilibrium state were adsorbed
Sophie Mompelat et al.
Journal of chromatography. A, 1407, 119-129 (2015-07-15)
A robust, selective and specific liquid chromatography-high resolution mass spectrometry (LC-HRMS) method was developed for the quantification of total residues of ceftiofur, an antibiotic belonging to the 3rd generation cephalosporins in plasma, muscle and kidney of poultry. Ceftiofur and conjugates
Ulrika Eriksson et al.
Environmental science and pollution research international, 20(11), 7940-7948 (2013-04-17)
Diet and drinking water are suggested to be major exposure pathways for perfluoroalkyl substances (PFASs). In this study, food items and water from Faroe Islands sampled in 2011/2012 were analyzed for 11 perfluoroalkyl carboxylic acids (PFCAs) and 4 perfluoroalkane sulfonic
Zinc electrowinning from acidic sulphate solutions Part IV: effects of perfluorocarboxylic acids.
Tripathy BC, et al.
Journal of Electroanalytical Chemistry, 565(1), 49-56 (2004)
Irene Delgado-Blanca et al.
Analytical and bioanalytical chemistry, 407(2), 521-528 (2014-11-06)
A new approach for the implementation of liquid-liquid extraction in a sequential injection manifold is presented. The manifold consists of two syringe pumps and one multi-position valve. The use of a 30Ā % MeOH/H2O (v/v) solution as the carrier, with isobutanol
Hamideh Hamidi et al.
Journal of chromatography. A, 1625, 461343-461343 (2020-07-28)
A simple magnetic dispersive solid-phase extraction (MDSPE) methodology based on mesoporous Fe3O4@ succinic acid nanospheres and high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) has been developed to determine kanamycin (KNM) and neomycin (NEO) contents in Measles, Mumps, and Rubella (MMR) vaccine
Artak Tovmasyan et al.
Journal of inorganic biochemistry, 140, 94-103 (2014-08-03)
In the present study we have synthesized a novel amphiphilic porphyrin and its Ag(II) complex through modification of water-soluble porphyrinic structure in order to increase its lipophilicity and in turn pharmacological potency. New cationic non-symmetrical meso-substituted porphyrins were characterized by
Qian Chen et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 224, 117362-117362 (2019-07-29)
In this work, a novel strategy for perfluorooctane sulfonic acid (PFOS) detection was established by using a ratiometric nanosensor with the combination of fluorescence and second-order scattering (SOS). The practical ratiometric nanosensor was synthesized simply by mixing fluorescent dye ethidium
Erin Gemperline et al.
Analytical methods : advancing methods and applications, 6(16), 6389-6396 (2015-02-11)
(RS)-3-(2-carboxypiperazin-4-yl)-propyl-1-phosphonic acid (CPP) is a competitive antagonist of the N-methyl-D-aspartate (NMDA) receptor and is routinely used with rodent models to investigate the role of NMDA receptors in brain function. This highly polar compound is difficult to separate from biological matrices.
Merja R HƤkkinen et al.
Journal of pharmaceutical and biomedical analysis, 45(4), 625-634 (2007-10-20)
A reversed phase liquid chromatography-electrospray ionization-tandem mass spectrometric method (RP-LC-ESI-MS/MS) was developed to separate and detect polyamines with minimal sample pre-treatment and without any derivatization. Prior to MS/MS analysis, a complete chromatographic separation of polyamines was achieved by a linear
M Naldi et al.
Journal of chromatography. A, 1129(1), 73-81 (2006-08-05)
The application of reversed-phase high-pressure liquid chromatography under gradient conditions and electrospray ion trap mass spectrometry (LC-ESI-MS) to the analysis of global modification levels of core histones is described. The optimised LC-ESI-MS method was applied for the first time to
Naoki Ochi
Journal of chromatography. A, 1601, 115-120 (2019-06-24)
A simple and accurate method was developed for the quantitative determination of eight biogenic amines (cadaverine, histamine, 2-phenylethylamine, putrescine, spermidine, spermine, tryptamine, and tyramine) in salted mackerel fillet. The eight biogenic amines in the samples were extracted with 5% trichloroacetic
Colton H F Wong et al.
Drug testing and analysis, 4(12), 1028-1033 (2012-06-27)
Gas chromatography-mass spectrometry (GC-MS) analysis after heptafluorobutyric anhydride (HFBA) derivatization was one of the published methods used for the quantification of ephedrine (EP) and pseudoephedrine (PE) in urine. This method allows the clear separation of the derivatized diastereoisomers on a
D R Harding et al.
International journal of peptide and protein research, 18(2), 214-220 (1981-08-01)
This report describes the successful use of the ether soluble, ion pairing reagents perfluoropropoinic and perfluorobutyric acid in the preparative and analytical reserved phase HPLC of underivatised peptides. The preparative separation of a 1-g sample of Pyr-His-Gly, the proposed anorexigenic
Yolanda PicĆ³ et al.
Analytical and bioanalytical chemistry, 407(15), 4247-4259 (2015-01-31)
The accurate determination of perfluoroalkyl substances (PFSAs) in water, sediment, fish, meat, and human milk was achieved by ultrahigh-performance liquid chromatography-quadrupole time-of-flight mass spectrometry (UHPLC-QqTOF-MS) with an ABSciex Triple TOFĀ®. A group of 21 PFSAs was selected as target to
Eva Gorrochategui et al.
Analytica chimica acta, 854, 20-33 (2014-12-07)
A lipidomic study was developed in a human placental choriocarcinoma cell line (JEG-3) exposed to tributyltin (TBT) and to a mixture of perfluorinated chemicals (PFCs). The method was based on the application of multivariate curve resolution-alternating least squares (MCR-ALS) to
Axel Mƶller et al.
Environmental pollution (Barking, Essex : 1987), 158(10), 3243-3250 (2010-08-10)
The concentration profile of 40 polyfluoroalkyl substances (PFAS) in surface water along the River Rhine watershed from the Lake Constance to the North Sea was investigated. The aim of the study was to investigate the influence of point as well
J Efraim Oosterink et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 998-999, 106-113 (2015-07-22)
Methionine, homocysteine, vitamins B6, B12, B9, and their metabolites are crucial co-factors and substrates for many basic biological pathways including one-carbon metabolism, and they are particularly important for brain function and development and epigenetic mechanisms. These are essential nutrients that
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