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Showing 1-30 of 3442 results for "110086" within Papers
Niclas Stephanson et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 985, 189-196 (2015-02-18)
A mass spectrometric method for drugs of abuse testing in exhaled breath employing a sampling device collecting aerosol particles was developed and applied in routine use. Analytes covered were amphetamine, methamphetamine, 6-acetylmorphine, morphine, cocaine, benzoylecgonine, diazepam, oxazepam and tetrahydrocannabinol. The
Regina Lohmayer et al.
Analytical chemistry, 87(6), 3388-3395 (2015-02-25)
Molybdenum precipitates preferentially under reducing conditions; therefore, its occurrence in sediment records is used as an indicator of paleoredox conditions. Although thiomolybdates (MoO4-xSx(2-) with x = 1-4) supposedly are necessary intermediates in the process of molybdenum precipitation under anoxic conditions
Natalia Campillo et al.
Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment, 32(12), 2039-2047 (2015-09-29)
Seven strobilurin fungicides were pre-concentrated from soya-based drinks using dispersive liquid-liquid micro-extraction (DLLME) with a prior protein precipitation step in acid medium. The enriched phase was analysed by liquid chromatography (LC) with dual detection, using diode array detection (DAD) and
Annamária Fejes-Szabó et al.
Journal of neural transmission (Vienna, Austria : 1996), 121(7), 725-738 (2014-01-05)
The systemic administration of nitroglycerine induces attacks in migraineurs and is able to activate and sensitize the trigeminal system in animals involving glutamate and α7-nicotinic acetylcholine receptors, among others. Kynurenic acid is one of the endogenous glutamate receptor antagonists, and
Yoshimi Yamakami et al.
Bioscience, biotechnology, and biochemistry, 78(12), 2022-2029 (2014-09-10)
Sublethal doses of surfactants as exemplified by NP-40 clearly induce premature senescence in normal human cells. To understand molecular basis for this phenomenon, we tried to suppress it with use of various inhibitors. An inhibitor of p38 of the MAPK
Rong-Jie Zeng et al.
Biomedical chromatography : BMC, 29(3), 459-464 (2014-07-30)
Boldine is a potential anti-inflammatory agent found in several different plants. Published bioanalytical methods using HPLC with ultraviolet and fluorescent detection lacked enough sensitivity and required tedious sample preparation procedures. Herein, we describe the development of a novel ultra-high performance
Eshwar Jagerdeo et al.
Journal of analytical toxicology, 39(2), 83-88 (2014-11-30)
The abuse of gamma-hydroxybutyric acid (GHB) and its suspicion in cases of suspected drug-facilitated sexual assault is of keen interest to forensic toxicology laboratories. This paper reports an extraction, separation and detection procedure for GHB in hair utilizing a combination
Wooram Lee et al.
Analytical chemistry, 86(13), 6379-6386 (2014-05-27)
Quantitative proteomic experiments with mass spectrometry detection are typically conducted by using stable isotope labeling and label-free quantitation approaches. Proteins with housekeeping functions and stable expression level such actin, tubulin, and glyceraldehyde-3-phosphate dehydrogenase are frequently used as endogenous controls. Recent
Juan José Baeza-Baeza et al.
Journal of separation science, 37(17), 2269-2277 (2014-06-20)
The so-called "fundamental equation for gradient elution" has been used for modeling the retention in gradient elution. In this approach, the instantaneous retention factor (k) is expressed as a function of the change in the modifier content (φ(ts )), ts
Christopher J Konop et al.
Journal of the American Society for Mass Spectrometry, 26(12), 2009-2023 (2015-07-16)
Neuromodulators have become an increasingly important component of functional circuits, dramatically changing the properties of both neurons and synapses to affect behavior. To explore the role of neuropeptides in Ascaris suum behavior, we devised an improved method for cleanly dissecting
Fenxia Zhu et al.
Journal of chromatographic science, 52(8), 862-871 (2013-08-31)
An ultra performance liquid chromatography coupled with photodiode array detector and time-of-flight tandem mass spectrometry (UPLC-PDA-TOF-MS) method was developed for the quality assessment of Danmu preparations, a commonly used traditional Chinese medicine. Thirty-three compounds from Danmu preparations were simultaneously detected;
Adriana S A Pereira et al.
Parasitology research, 114(3), 1145-1152 (2015-01-13)
Schistosoma mansoni is one of the most common parasites infecting humans. They are well adapted to the host, and this parasite's longevity is a consequence of effective escape from the host immune system. In the blood circulation, lipoproteins not only
Maria Sol Degese et al.
The Biochemical journal, 467(1), 77-90 (2015-01-15)
Mitogen-activated protein kinase (MAPK) pathways constitute key regulatory elements linking extracellular stimuli to nuclear gene expression. Immediate-early responsive genes (IEGs) of the activator protein 1 (AP-1) family, such as fos, achieve peak expression levels shortly after cells are stimulated with
Yusuke Matsumura et al.
PloS one, 9(11), e112180-e112180 (2014-11-07)
Numerous clinical studies have reported that ingestion of chocolate reduces the risk of metabolic syndrome. However, the mechanisms by which this occurs remain unclear. In this murine study, the metabolic-enhancing activity of a 10 mg/kg mixture of flavan-3-ol fraction derived
Gerardo Leyva-Gómez et al.
Journal of pharmaceutical sciences, 103(8), 2509-2519 (2014-06-12)
To document the efficacy of clonazepam (CLZ) either free as a solution or loaded in solid lipid nanoparticles (CLZ-SLN) or mixed micelles (CLZ-MM), the in vitro blood-brain barrier permeability of the formulations was determined. Behavior and/or electroencephalograms (EEGs) of rodents
Yan Yan et al.
Journal of pharmaceutical and biomedical analysis, 95, 76-84 (2014-03-19)
A liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS) method was developed and validated for simultaneous determination of seven constituents including puerarin, daidzin, daidzein, paeoniflorin, albiflorin, liquiritin and liquiritigenin in rat plasma using schisandrin as the internal standard (IS). The plasma samples
I Zabaleta et al.
Journal of chromatography. A, 1387, 13-23 (2015-02-25)
An analytical method for the simultaneous determination in fish liver and muscle tissue and mussel samples of 14 perfluorinated compounds (PFCs), including three perfluoroalkylsulfonates (PFSAs), seven perfluorocarboxylic acids (PFCAs), three perfluorophosphonic acids (PFPAs) and perfluorooctanesulfonamide (PFOSA), and 10 potential precursors
Margherita Di Pisa et al.
Journal of medicinal chemistry, 58(3), 1390-1399 (2015-01-15)
Celiac disease (CD) patients usually present high levels of circulating IgA antibodies directed to different antigens, in particular tissue transglutaminase (tTG), gliadin (Glia), and endomysium. A series of synthetic peptide constructs containing cross-linked tTG and Glia deamidated peptides have been
Joanne L Porter et al.
ACS chemical biology, 10(2), 611-621 (2014-11-25)
The ease with which enzymes can be adapted from their native roles and engineered to function specifically for industrial or commercial applications is crucial to enabling enzyme technology to advance beyond its current state. Directed evolution is a powerful tool
Xingyuan Jiao et al.
Journal of separation science, 37(21), 3033-3044 (2014-08-20)
We first detected aberrant nucleoside levels in the plasma, urine, bile, and tissues from cases and controls to explore them as biomarkers in the diagnosis of gallbladder cancer. Reversed-phase high-performance liquid chromatography was used to assess the levels of ten
Stefan L Karlsson et al.
PloS one, 9(11), e108521-e108521 (2014-11-15)
We describe here the development of stable classical and El Tor V. cholerae O1 strains of the Hikojima serotype that co-express the Inaba and Ogawa antigens of O1 lipopolysaccharide (LPS). Mutation of the wbeT gene reduced LPS perosamine methylation and
Jillian Roberts et al.
Journal of AOAC International, 97(3), 884-888 (2014-07-24)
A method was developed and validated for the determination of ochratoxin A (OTA), a fungal metabolite, in cocoa beans of high fat content. The sample was extracted by blending with a 1% sodium bicarbonate solution (pH 10) followed by ultrasonication
Paul Dowling et al.
Molecular bioSystems, 11(3), 743-752 (2014-12-09)
Lung cancer is the second most common type of cancer in the world and is the most common cause of cancer-related death in both men and women. Research into causes, prevention and treatment of lung cancer is ongoing and much
Bilal Yilmaz et al.
Journal of chromatographic science, 52(7), 584-589 (2013-06-25)
A simple high-performance liquid chromatography method has been developed for the determination of naproxen in human plasma. The method was validated on an Ace C18 column using ultraviolet detection. The mobile phase consisted of 20 mM phosphate buffer (pH 7)
Holly A Reeve et al.
ChemCatChem, 7(21), 3480-3487 (2015-11-28)
We describe a new approach to selective H
Gang-Tian Zhu et al.
The Analyst, 139(23), 6266-6271 (2014-10-16)
A novel in-syringe dispersive solid phase extraction (dSPE) system using electrospun silica fibers as adsorbents has been developed in the current work. A few milligrams of electrospun silica fibers were incubated in sample solution in the barrel of a syringe
Lakkireddy Prakash et al.
Journal of chromatographic science, 53(1), 122-126 (2014-05-20)
Nicorandil is a potent drug with a dual mechanism of action which results in its wide application in treating angina patients. Since the literature review showed no single preparative method for isolation and liquid chromatography-mass spectrometry (LC-MS) compatible [high-performance liquid
Paul K L Chin et al.
British journal of clinical pharmacology, 78(3), 630-638 (2014-03-07)
In patients with atrial fibrillation prescribed dabigatran, the aim was to examine the correlation between plasma dabigatran concentrations and the three screening coagulation assays [international normalized ratio (INR), activated partial thromboplastin time (aPTT) and thrombin time (TT)] as well as
R Kanďár et al.
Andrologia, 46(10), 1079-1088 (2013-10-16)
A method is described here for the determination of total glutathione (TGSH) and glutathione disulphide (GSSG) in the seminal plasma of the male partners of couples requesting a fertility evaluation. A suitable sample preparation procedure prior to high-performance liquid chromatography
Ketsarin Seebunrueng et al.
Talanta, 132, 769-774 (2014-12-06)
A simple and rapid microextraction method, vortex-assisted low density solvent liquid-liquid microextraction and salt-induced demulsification (VLLME-SID) coupled to high performance liquid chromatography (HPLC) was developed for the determination of organophosphorus pesticide (OPP) residues in fruits. The studied OPPs were azinphos-methyl
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