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646377

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Matías Butler et al.
Journal of mass spectrometry : JMS, 50(1), 136-144 (2015-01-21)
A series of 11 pairs of substituted pyrazine N-oxides, differing in the substituent position, were examined using electrospray ionization mass spectrometry (ESI-MS) in order to use spectra to assess the differentiation of positional isomers. For each compound, mass spectra were...
Amandeep Kaur et al.
Zeitschrift fur Naturforschung. C, Journal of biosciences, 69(3-4), 110-116 (2014-05-31)
The antileishmanial activity of extracts and phytoconstituents of Moringa oleifera Lam. was investigated in vitro against promastigotes of Leishmania donavani. The 70% ethanolic extract of roots and the methanolic extract of leaves showed moderate inhibitory activity with IC50 values of...
Tânia Petta et al.
Enzyme and microbial technology, 58-59, 36-43 (2014-04-16)
Lipid mediators such as the leukotrienes, resolvins and protectins have been considered excellent models for the development of new anti-inflammatory drugs, due to their high potentiality. Nevertheless, only tiny amounts are available from natural sources and they have to be...
Samantha A Radford et al.
Journal of agricultural and food chemistry, 62(29), 7085-7091 (2014-06-10)
A solid phase extraction method was developed to isolate four insecticide degradates from baby food that were measured subsequently using high-performance liquid chromatography-tandem mass spectrometry. The degradates [parent insecticide] measured were malathion dicarboxylic acid [malathion], 3,5,6-trichloro-2-pyridinol [chlorpyrifos, chlorpyrifos methyl] (TCPy)...
Ottmar Golf et al.
Journal of the American Society for Mass Spectrometry, 26(1), 44-54 (2014-11-09)
Here we present a proof of concept cross-platform normalization approach to convert raw mass spectra acquired by distinct desorption ionization methods and/or instrumental setups to cross-platform normalized analyte profiles. The initial step of the workflow is database driven peak annotation...
Mohammad Asif Iqbal et al.
Journal of chromatography. A, 1373, 149-158 (2014-12-04)
In the analysis of biogenic volatile organic compounds (BVOCs) in ambient air, preparation of a sub-ppb level standard is an important factor. This task is very challenging as most BVOCs (e.g., monoterpenes) are highly volatile and reactive in nature. As...
Laura Jaime et al.
Journal of the science of food and agriculture, 95(4), 722-729 (2014-06-17)
In this work three different techniques were applied to extract dry leaves of spinach (Spinacia oleracea): solid-liquid extraction (SLE), pressurised liquid extraction (PLE) and supercritical fluid extraction (SFE) to investigate the influence of extraction solvent and technique on extracts composition...
Bin Xu et al.
Talanta, 132, 245-251 (2014-12-06)
A new isotope-dilution liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for determination of sulfur mustard (SM) has been developed using a direct chemical derivatization method by nucleophile potassium thioacetate (PTA) in aqueous solution. The reaction conditions for derivatization, such as reaction...
Mark E Lobatto et al.
ACS nano, 9(2), 1837-1847 (2015-01-27)
Atherosclerosis is a major cause of global morbidity and mortality that could benefit from novel targeted therapeutics. Recent studies have shown efficient and local drug delivery with nanoparticles, although the nanoparticle targeting mechanism for atherosclerosis has not yet been fully...
Yuanyuan Shi et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 986-987, 100-107 (2015-03-01)
Picrasma quassioides (D. Don) Benn. is used in traditional Chinese medicine for the treatment of inflammation. Characteristic components of the medicinal extract are canthinone alkaloids. In this study, a sensitive and rapid liquid chromatography with tandem mass spectrometry method has...
Milena M Madry et al.
Bioanalysis, 6(23), 3183-3196 (2014-12-23)
Toenails were assessed as an alternative matrix to hair for retrospective monitoring of cocaine consumption of recreational and dependent users. Results/methodology: Toenail clippings, scrapings and hair samples from recreational and dependent cocaine users were analyzed for cocaine and metabolites. Dependent...
Jiangbin Ye et al.
Cancer discovery, 4(12), 1406-1417 (2014-09-05)
The de novo synthesis of the nonessential amino acid serine is often upregulated in cancer. In this study, we demonstrate that the serine catabolic enzyme, mitochondrial serine hydroxymethyltransferase (SHMT2), is induced when MYC-transformed cells are subjected to hypoxia. In mitochondria...
D Q Li et al.
Journal of chromatography. A, 1345, 50-56 (2014-05-06)
Xanthine oxidase (XO) can catalyze hypoxanthine and xanthine to generate uric acid and reactive oxygen species (ROS), including superoxide anion radical (O₂(•-)) and hydrogen peroxide. XO inhibitors and free radical scavengers are beneficial to the treatment of gout and many...
Chengcheng Peng et al.
Biomedical chromatography : BMC, 29(3), 425-436 (2014-07-22)
Shexiang Baoxin pills (SBP) are a traditional Chinese medicine that are used for treating coronary heart disease. Ginsenosides are the main effective components of SBP, but a comprehensive and deep pharmacokinetic study of ginsenosides in SBP, including multiple dosing and...
Yi Liang et al.
Biomedical chromatography : BMC, 28(10), 1378-1383 (2014-03-22)
A simple, rapid and sensitive ultra-performance liquid chromatography-tandem mass spectrometry method was developed and validated for the determination of honokiol in beagle dog plasma after intravenous guttae. With addition of the internal standard magnolol, plasma samples were precipitated with methanol...
Rajib Ghosh et al.
Chemphyschem : a European journal of chemical physics and physical chemistry, 15(18), 4126-4131 (2014-09-25)
Understanding the excited-state properties of thioflavin-T (ThT) has been of immense importance, because of its efficient amyloid-sensing ability related to neurodegenerative disorders. The excited-state dynamics of ThT is studied by using sub-pico- and nanosecond time-resolved transient absorption techniques as well...
M Anbarasu et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 135, 536-539 (2014-08-16)
Polyethylene glycol (PEG) coated Fe3O4 nanoparticles were synthesized by chemical co-precipitation method. With polyethylene glycol (PEG) as a stabilizer and dispersant. The X-ray diffraction and selected area electron diffraction (SAED) results show that the cubic inverse spinel structure of pure...
Seon-Mi Yu et al.
International journal of molecular medicine, 35(2), 325-332 (2014-12-02)
Dedifferentiation and inflammation are major features of cartilage degeneration during the pathogenesis of osteoarthritis (OA). Thymoquinone (TQ) is the major compound of black seed oil isolated from Nigella sativa with various beneficial or harmful effects on several diseases; however, its...
Marie-Clotilde Bernard et al.
PloS one, 10(4), e0121518-e0121518 (2015-04-04)
HSV-2 vaccine is needed to prevent genital disease, latent infection, and virus transmission. A replication-deficient mutant virus (dl5-29) has demonstrated promising efficacy in animal models of genital herpes. However, the immunogenicity, protective efficacy, and non-replicative status of the highly purified...
Jean-Claude Alvarez et al.
Journal of pharmaceutical and biomedical analysis, 97, 29-32 (2014-05-13)
As previously shown for imatinib, therapeutic drug monitoring (TDM) of vemurafenib should be important to measure efficacy of the treatment in melanoma patient. A micro-method based on liquid chromatography coupled to triple quadrupole spectrometry detection using only 10μL of plasma...
Nhung T T Dang et al.
European journal of pharmaceutics and biopharmaceutics : official journal of Arbeitsgemeinschaft fur Pharmazeutische Verfahrenstechnik e.V, 88(2), 406-414 (2014-06-03)
Polycaprolactone (PCL) matrices were simultaneously loaded with the antiviral agents, tenofovir (TFV) and nevirapine (NVP), in combination to provide synergistic activity in the prevention of HIV transmission through the vaginal route. TFV and NVP were incorporated in PCL matrices at...
Natsumi Matsuura et al.
International journal of cardiology, 179, 360-369 (2014-12-03)
Pioglitazone is a thiazolidinedione drug that acts as an insulin sensitizer. We recently characterized DahlS.Z-Lepr(fa)/Lepr(fa) (DS/obese) rats, derived from a cross between Dahl salt-sensitive and Zucker rats, as a new animal model of metabolic syndrome. We have now investigated the...
Tarvi Teder et al.
Journal of lipid research, 55(12), 2587-2596 (2014-10-09)
Herein, we characterize a generally applicable transformation of fatty acid epoxides by lipoxygenase (LOX) enzymes that results in the formation of a five-membered endoperoxide ring in the end product. We demonstrated this transformation using soybean LOX-1 in the metabolism of...
William C W Chen et al.
Stem cells (Dayton, Ohio), 33(2), 557-573 (2014-10-23)
Perivascular mesenchymal precursor cells (i.e., pericytes) reside in skeletal muscle where they contribute to myofiber regeneration; however, the existence of similar microvessel-associated regenerative precursor cells in cardiac muscle has not yet been documented. We tested whether microvascular pericytes within human...
Lu Yan et al.
Journal of ethnopharmacology, 162, 155-162 (2015-01-07)
Kai-Xin-San (KXS), a well-known traditional Chinese herbal decoction, has been widely used to treat mental depression and memory loss in China. It has a combination of four herbs: Ginseng Radix et Rhizoma (GR; root and rhizome of Panax ginseng C....
Oliver Lerch et al.
Analytical and bioanalytical chemistry, 406(18), 4443-4451 (2014-05-03)
The analysis of opioids, cocaine, and metabolites from blood serum is a routine task in forensic laboratories. Commonly, the employed methods include many manual or partly automated steps like protein precipitation, dilution, solid phase extraction, evaporation, and derivatization preceding a...
Saori Ishizaka et al.
Journal of equine science, 25(4), 65-72 (2015-01-06)
The effects of probiotics on horses are still controversial. The present study was a randomized, double-blinded, placebo-controlled crossover study designed to evaluate the ability of probiotics to improve intestinal conditions in adult horses. Fermented probiotics were administered to 10 healthy...
Dominik Lermen et al.
PloS one, 9(8), e105401-e105401 (2014-08-21)
Technical progress has simplified tasks in lab diagnosis and improved quality of test results. Errors occurring during the pre-analytical phase have more negative impact on the quality of test results than errors encountered during the total analytical process. Different infrastructures...
Chunyong He et al.
Journal of pharmaceutical and biomedical analysis, 109, 150-157 (2015-03-17)
Notoginsenoside Fc (NGFc) is a protopanaxadiol-type (PPD-type) saponin from Panax notoginseng, which has perfect anti-platelet aggregatory effect. However, its pharmacokinetics and metabolism in vivo remain unknown. In this study, a simple and sensitive liquid chromatography/electrospray ionization tandem mass spectrometry (LC-MS/MS)...
Jung-Chen Su et al.
Carcinogenesis, 35(12), 2807-2814 (2014-10-18)
Regulatory factor X-1 (RFX-1) is a transcription factor that has been linked to negative regulation of tumor progression; however, its biological function and signaling cascades are unknown. Here, we performed several studies to elucidate the roles of RFX-1 in the...
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