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Showing 1-30 of 144 results for "169099" within Papers
Igor Jerković et al.
Chemistry & biodiversity, 12(7), 1047-1056 (2015-07-15)
The present study is focused on the antioxidant capacity and chemical profiling of eight Croatian Satureja montana L. honey samples. Among the 20 compounds obtained by headspace solid-phase microextraction (HS-SPME) and identified by GC-FID and GC/MS analyses, hotrienol was predominant
Koji Kosaka et al.
Environmental science & technology, 48(19), 11243-11250 (2014-09-04)
N-Nitrosodimethylamine (NDMA), a potential human carcinogen, is known to be a disinfection byproduct of chloramination and ozonation. NDMA is formed during ozonation at water purification plants in the Yodo River basin, a major drinking water source in western Japan. An
Fatemeh S Mirnaghi et al.
Journal of chromatography. A, 1261, 91-98 (2012-07-25)
This work presents the development and evaluation of biocompatible polyacrylonitrile-polystyrene-divinylbenzene (PAN-PS-DVB) and polyacrylonitrile-phenylboronic acid (PAN-PBA) coatings for automated 96-blades (thin-film) solid phase microextraction (SPME) system, using high performance liquid chromatography (HPLC) coupled with tandem mass spectrometry (MS/MS). The SPME condition
Dennis Fiorini et al.
Journal of chromatography. A, 1409, 282-287 (2015-07-27)
Given the importance of short and medium chain free fatty acids (FFAs) in several fields, this study sought to improve the extraction efficiency of the solid-phase microextraction (SPME) of FFAs by evaluating salting out agents that appear promising for this
Jonathan J Grandy et al.
Journal of chromatography. A, 1410, 1-8 (2015-08-06)
In this work, a highly reproducible standard gas generating vial is proposed. The vial is comprised of a silicon diffusion pump oil spiked with an appropriate calibration compound, such as modified McReynolds probes (benzene, 2-pentanone, pyridine, 1-nitropropane, 1-pentanol, and n-octane)
Menglin Ma et al.
Journal of bacteriology, 197(10), 1807-1818 (2015-03-18)
The accessory growth regulator (Agr)-like quorum sensing (QS) system of Clostridium perfringens controls the production of many toxins, including beta toxin (CPB). We previously showed (J. E. Vidal, M. Ma, J. Saputo, J. Garcia, F. A. Uzal, and B. A.
Chih-Chao Wu et al.
Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering, 50(11), 1116-1126 (2015-07-21)
The stable tricyclic structure of the cylindrospermopsin (CYN), a cynotoxin, has presented several challenges to water treatment facilities, as conventional treatment methods have a limited ability to remove it from water. This study examines the effectiveness of titanium dioxide (TiO2)
Francesco Tres et al.
Molecular pharmaceutics, 12(5), 1512-1522 (2015-04-16)
Real-time in situ Raman mapping has been employed to monitor, during dissolution, the crystallization transitions of amorphous bicalutamide formulated as a molecular dispersion in a copovidone VA64 matrix. The dissolution performance was also investigated using the rotating disc dissolution rate
Vilma Kaškonienė et al.
Phytochemistry, 115, 184-193 (2015-03-03)
Due to the wide spectrum of biological activities, Chamerion angustifolium L. as medicinal plant is used for the production of food supplements. However, it should be kept in mind that quality (biological activity) of the herb depends on its geographic
Y Zhao et al.
Meat science, 107, 57-63 (2015-05-08)
Dry-cured hams often become infested with ham mites (Tyrophagus putrescentiae) during the aging process. Methyl bromide has been used to fumigate dry cured ham plants and is the only available fumigant that is effective at controlling ham mite infestations. However
Malavika Sinha et al.
Fungal biology, 119(4), 274-282 (2015-03-31)
The filamentous fungus, Asperigillus carbonarius, is able to produce a series of hydrocarbons in liquid culture using lignocellulosic biomasses, such as corn stover and switch grass as carbon source. The hydrocarbons produced by the fungus show similarity to jet fuel
J C Beaulieu et al.
Food chemistry, 181, 354-364 (2015-03-22)
Colorful antioxidant-rich fruits often convey astringency and sourness that juice consumers may not appreciate. We assessed properties in juices from a collection of California-grown pomegranate from the National Clonal Germplasm Repository. The goal was to evaluate overall differences in germplasm
D Bratkowska et al.
Journal of chromatography. A, 1225, 1-7 (2012-01-10)
A monolithic, hydrophilic stir bar coating based upon a copolymer of methacrylic acid and divinylbenzene [poly(MAA-co-DVB)] was synthesised and evaluated as a new polymeric phase for the stir bar sorptive extraction (SBSE) of polar compounds from complex environmental water samples.
Yoshinobu Miyazaki et al.
Talanta, 85(4), 1798-1804 (2011-08-30)
Protonation and ion exchange equilibria of weak base anion-exchange resins, in which tertiary amine moieties were introduced as a functional group, were investigated by applying NMR spectroscopy to species adsorbed into the resins. (31)P NMR signals of the phosphinate ion
Nicholas D Stebbins et al.
Biomacromolecules, 16(11), 3632-3639 (2015-10-10)
Sugar alcohols, such as mannitol and xylitol, are biocompatible polyols that have been used to make highly cross-linked polyester elastomers and dendrimers for tissue engineering and drug delivery. However, research that utilizes the secondary hydroxyl groups as sites for pendant
Laure Saint-Lary et al.
Chemistry & biodiversity, 11(6), 843-860 (2014-06-18)
Absolutes isolated from Viola odorata leaves, valuable materials for the flavor and fragrance industry, were studied. Violets are mainly cultivated in France and Egypt and extracted locally. The absolutes of the two origins showed different olfactory profiles both in top
Ruyi Xu et al.
Journal of chromatography. A, 1350, 15-22 (2014-05-28)
A fast and efficient method for the determination of tricyclic antidepressants using electro-enhanced solid phase microextraction (SPME) coupled to gas chromatography-mass spectrometry (GC-MS) has been developed. One advantage of this approach is that the mass transfer of target analytes from
Shidong Lv et al.
PloS one, 9(12), e116428-e116428 (2015-01-01)
The quality of tea is presently evaluated by the sensory assessment of professional tea tasters, however, this approach is both inconsistent and inaccurate. A more standardized and efficient method is urgently needed to objectively evaluate tea quality. In this study
Nathaly Reyes-Garcés et al.
Journal of chromatography. A, 1374, 40-49 (2014-12-03)
Simple, fast and efficient sample preparation approaches that allow high-throughput isolation of various compounds from complex matrices are highly desired in bioanalysis. Particularly sought are methods that can, without sacrificing time, easily remove matrix interferences capable of inducing ionization suppression/enhancement
Phillip Trefz et al.
Journal of chromatography. A, 1219, 29-38 (2011-12-06)
Combining advantages of SPE and SPME needle trap devices (NTD) represent promising new tools for a robust and reproducible sample preparation. This study was intended to investigate the effect of different packing materials on efficacy and reproducibility of VOC analysis
Maria De Angelis et al.
PloS one, 9(6), e99006-e99006 (2014-06-13)
This study aimed at investigating the fecal microbiota, and the fecal and urinary metabolome of non progressor (NP) and progressor (P) patients with immunoglobulin A nephropathy (IgAN). Three groups of volunteers were included in the study: (i) sixteen IgAN NP
Fuyou Du et al.
Analytical and bioanalytical chemistry, 407(20), 6071-6079 (2015-05-31)
High-internal-phase-emulsion polymers (polyHIPEs) show great promise as solid-phase-extraction (SPE) materials because of the tremendous porosity and highly interconnected framework afforded by the high-internal-phase-emulsion (HIPE) technique. In this work, polyHIPE monolithic columns as novel SPE materials were prepared and applied to
Mariusz Dziadas et al.
Analytica chimica acta, 699(1), 66-72 (2011-06-28)
A comparison of SPE cartridges produced in authors laboratory containing silica modified by addition of three functional moieties with standard C-18 and SDVB cartridges was made in terms of their applicability for the isolation of flavor compounds. Compounds found in
Jean-Christophe Barbe et al.
Journal of agricultural and food chemistry, 62(48), 11620-11627 (2014-11-21)
This study focuses on an off-flavor in wines treated by an acidification technique involving ion-exchange resins. Applying reversed-phase HPLC on a C18 column to a contaminated wine extract resulted in 25 fractions in dilute alcohol medium, and only one, fraction
Magdalena Surma et al.
Ecotoxicology and environmental safety, 120, 436-444 (2015-07-06)
Perfluorooctanesulfonate (PFOS) and perfluorooctanoic acid (PFOA) are the main representatives of an rising class of persistent organic pollutants (POPs), perfluorochemicals (PFCs). In this study, determination of selected PFCs concentration in liver, brain, tail, adipose and peritoneum tissues of free-living European
Alessandra Bendini et al.
International journal of food sciences and nutrition, 66(4), 371-377 (2015-05-23)
The aim of this investigation was to produce an olive oil (OO) naturally enriched with antioxidants, recovering carotenoids, in particular lycopene, using an industrial by-product of tomato seeds and skin. For this purpose, a technological process in a low-scale industrial
Cheanyeh Cheng et al.
Journal of chromatography. A, 1380, 1-10 (2015-01-08)
An online solid-phase microextraction coupled liquid chromatography-electrospray ionization-ion trap mass spectrometry was developed for the analysis of trace R- and S-4-phenyl-2-butanol (R- and S-pbol) in salt rich cell culture of Saccharomyces cerevisiae catalyzed stereoselective reduction of 4-pheny-2-butanone (pbone). A Supel-Q
Mashaalah Zarejousheghani et al.
Journal of chromatography. A, 1411, 23-33 (2015-08-11)
Acesulfame is a known indicator that is used to identify the introduction of domestic wastewater into water systems. It is negatively charged and highly water-soluble at environmental pH values. In this study, a molecularly imprinted polymer (MIP) was synthesized for
Yanan Yuan et al.
Journal of chromatography. A, 1408, 49-55 (2015-07-21)
A new type of ionic liquid-molecularly imprinted polymers (IL-MIPs) synthesized by precipitation polymerization using 1-allyl-3-methylimidazolium bromide and acrylamide as co-functional monomers and (Z)-6-fluoro-3-(hydroxymethylene)-thiochroman-4-one (FHO) as dummy template was successfully applied as a selective adsorbent of pipette tip solid-phase extraction (PT-SPE)
Yulei Wang et al.
Analytica chimica acta, 840, 33-41 (2014-08-05)
In this work, a new stir cake sorptive extraction (SCSE) using polymeric ionic liquid monolith as sorbent was prepared. The sorbent was obtained by in situ copolymerization of an ionic liquid, 1-allyl-3-methylimidazolium bis[(trifluoro methyl)sulfonyl]imide (AMII) and divinylbenzene (DB) in the
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