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Showing 1-30 of 2080 results for "57294-U" within Papers
Marghereth Saverini et al.
Journal of photochemistry and photobiology. B, Biology, 108, 8-15 (2012-01-20)
The presence of (±)α-pinene, (+)β-pinene, (+)3-carene, and R-(+)limonene terpenes in wastewater of a citrus transformation factory was detected and analyzed, in a previous study, by using Solid Phase Micro-extraction (SPME) followed by GC analyses. Purpose of that research was to
Chloe Murat et al.
Food chemistry, 135(3), 913-920 (2012-09-08)
Pisum sativum is of great economic and nutritional interest due to its protein content. Nevertheless, pea products are underused as a protein source in human food because of their strong beany flavour. Therefore, the objective of this study was to
Qingling Hua et al.
Oncology letters, 15(5), 7806-7816 (2018-05-05)
To date, there have been a limited number of useful biomarkers for the screening and monitoring of B-cell non-Hodgkin's lymphoma (B-NHL), which leads to the impetus to discover novel biomarkers for the disease. In the present study, gas chromatography-mass spectrometry
Runmiao Xue et al.
Chemosphere, 189, 349-356 (2017-09-25)
Free chlorine is a commonly used disinfectant in drinking water treatment. However, disinfection by-products (DBPs) are formed during water disinfection. Haloacetic acids (HAAs) and trihalomethanes (THMs) are two major groups of DBPs. Iodo-HAAs and iodo-THMs (I-HAAs and I-THMs) are formed
Min Sun et al.
Journal of chromatography. A, 1408, 41-48 (2015-07-21)
A fiber-in-tube solid-phase microextraction (SPME) device was developed with copper wire and copper tube, which was served as both the substrate and sorbent with high physical strength and good flexibility. Its morphology and surface properties were characterized by scanning electron
Paulina Wiśniewska et al.
Critical reviews in analytical chemistry, 45(3), 201-225 (2015-04-08)
Spirit-based beverages are alcoholic drinks; their production processes are dependent on the type and origin of raw materials. The composition of this complex matrix is difficult to analyze, and scientists commonly choose gas chromatography techniques for this reason. With a
Mariana Gil et al.
Phytochemistry, 96, 148-157 (2013-10-01)
Ultraviolet-B solar radiation (UV-B) is an environmental signal with biological effects in plant tissues. Recent investigations have assigned a protective role of volatile organic compounds (VOCs) in plant tissues submitted to biotic and abiotic stresses. This study investigated VOCs in
Nadezhda V Bakaikina et al.
Talanta, 184, 332-337 (2018-04-21)
Determination of transformation products (TPs) of rocket fuel unsymmetrical dimethylhydrazine (UDMH) in soil is highly important for environmental impact assessment of the launches of heavy space rockets from Kazakhstan, Russia, China and India. The method based on headspace solid-phase microextraction
Lulu Li et al.
Analytica chimica acta, 948, 48-54 (2016-11-23)
In this work, ionic liquid (IL, i.e. 1-hydroxyethyl-3-methylimidazolium tetrafluoroborate), carboxyl multiwall carbon nanotubes (MWCNTs) and reduced graphene oxide (rGO) were used to prepare three-dimensional porous material (MWCNTs-rGO-IL) by one-step self-assembly, then it was co-electrodeposited with polyaniline (PANI) on stainless steel
Juanjuan Feng et al.
Journal of separation science, 41(8), 1839-1846 (2018-01-13)
Ionic liquids have been widely used in different fields by advantage of their specific properties. In this work, 1-methyl-3-(3-trimethoxysilyl propyl)imidazolium chloride was prepared and chemically bonded onto basalt fibers for in-tube solid-phase microextraction. Through combining in-tube extraction device with high-performance
Adalberto Menezes Filho et al.
Talanta, 81(1-2), 346-354 (2010-03-02)
A method was developed for the simultaneous analysis of 14 pesticide residues (clofentezine, carbofuran, diazinon, methyl parathion, malathion, fenthion, thiabendazole, imazalil, bifenthrin, permethrin, prochloraz, pyraclostrobin, difenoconazole and azoxystrobin) in mango fruit, based on solid-phase micro extraction (SPME) coupled to gas
Giacomo Luigi Petretto et al.
Natural product research, 30(3), 286-292 (2015-07-28)
Seven commercial Moroccan honeys were considered for chemical characterisation. Volatile fraction, total polyphenols content, antioxidant and antiradical activities were evaluated by employing different analytical methodologies. Several physical parameters such as refractive index, pH, water content, solids content and colour were
M D Engelmann et al.
Analytical and bioanalytical chemistry, 375(3), 460-464 (2003-02-18)
Solid-phase micro extraction (SPME) and on-fiber derivatization followed by Gas Chromatography coupled with Flame Ionization Detection (GC-FID) or Selected Ion Monitoring Mass Spectrometry (GC-SIMMS) allows for simple yet sensitive quantification for the hexamethyldisilazane derivative of the beta-agonist clenbuterol. Using an
Han-Peng Jiang et al.
Journal of chromatography. A, 1462, 90-99 (2016-08-09)
More than 140 modified ribonucleosides have been identified in RNA. Determination of endogenous modified ribonucleosides in biological fluids may serve as non-invasive disease diagnostic strategy. However, detection of the modified ribonucleosides in biological fluids is challenging, especially for the low
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
Germán Augusto Gómez-Ríos et al.
Analytical chemistry, 89(7), 3805-3809 (2017-02-15)
In recent years, the direct coupling of solid phase microextraction (SPME) and mass spectrometry (MS) has shown its great potential to improve limits of quantitation, accelerate analysis throughput, and diminish potential matrix effects when compared to direct injection to MS.
Guillaume Antalick et al.
Journal of agricultural and food chemistry, 63(41), 9103-9111 (2015-10-06)
This work reports the quantitation and sensory characterization of 1,4-cineole in red wine for the first time. A headspace-solid-phase microextraction-gas chromatography-mass spectrometry (HS-SPME-GC-MS) method was developed to quantitate 1,4-cineole and 1,8-cineole in 104 commercial Australian red wines. 1,4-Cineole was detected
C van Netten et al.
The Science of the total environment, 263(1-3), 155-160 (2001-02-24)
Foray 48B, an insecticide prepared from Bacillus thuringiensis var. kurstaki (Btk), has been used for many years to combat infestations of Gypsy moths. Foray 48B also contains a large number of 'inert ingredients' which are not disclosed by the manufacturer.
Yong Zhang et al.
Analytical and bioanalytical chemistry, 407(2), 557-567 (2014-11-20)
A porous poly(methacrylic acid-co-ethylene dimethacrylate) monolithic fiber (MEMF) for solid-phase microextraction (SPME) of five benzimidazole anthelmintics was prepared by in-situ polymerization. The effect of polymerization conditions on SPME of the target analytes was studied thoroughly. The physicochemical properties of the
Jiafen Zhan et al.
Se pu = Chinese journal of chromatography, 26(3), 301-305 (2008-08-30)
The volatile components of Qingshanlvshui Tea were extracted using solid phase micro-extraction (SPME) and accelerated solvent extraction (ASE), and then were identified by gas chromatography-mass spectrometry (GC-MS). It showed that ninety-one compounds were identified, including forty-nine by SPME, fifty-six by
Jiewei Deng et al.
Analytical chemistry, 86(22), 11159-11166 (2014-10-30)
Coupling solid-phase microextraction (SPME) with ambient mass spectrometry using surface coated wooden-tip probe was achieved for the first time and applied in the analysis of ultra trace perfluorinated compounds (PFCs) in complex environmental and biological samples. We modified n-octadecyldimethyl[3-(trimethoxysilyl)propyl]ammonium chloride
Rosaria Cozzolino et al.
Food chemistry, 213, 361-368 (2016-07-28)
The volatile profile of three sweet basil cultivars, "Italico a foglia larga", "Cammeo" and "Italiano classico", packaged in air at 4 or 12°C until 9days, was monitored by solid phase microextraction with GC-MS. Chilling injury (CI) score and electrolyte leakage
F Gandolfi et al.
Journal of chromatography. A, 1406, 59-67 (2015-07-02)
The water framework directives (WFD 2000/60/EC and 2013/39/EU) force European countries to monitor the quality of their aquatic environment. Among the priority hazardous substances targeted by the WFD, short chain chlorinated paraffins C10-C13 (SCCPs), still represent an analytical challenge, because
Shuaihua Zhang et al.
Talanta, 166, 46-53 (2017-02-19)
A high-surface-area nanoporous carbon (NPC) has been successfully synthesized by using the metal-organic framework ZIF-90 as both the template and precursor together with furfuryl alcohol as a secondary carbon source. The prepared ZIF-90 templated NPC (ZIF-90-NPC) was then coated onto
Yeh-Chung Chien et al.
Journal of hazardous materials, 193, 139-148 (2011-08-20)
This work evaluates the characteristics of short-term release of volatile and semi-volatile organic chemicals from clothing fabrics that are exposed to environmental tobacco smoke (ETS). Various fabrics were concurrently exposed to ETS in a controlled facility, and the chemicals off-gassed
Edited by Sue Ann Scheppers Wercinski
Solid Phase Microextraction: A Practical Guide, 257-257 (1999)
Xin-Li Song et al.
Journal of chromatography. A, 1468, 17-22 (2016-09-24)
Multiwalled carbon nanotubes (MWCNTs) on polystyrene (PS) microspheres have been designed and prepared by layer-by-layer assembly via electrostatic interaction. MWCNTs@PS was characterized by scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). The new materials were employed as a novel solid-phase
M M Delgado-Povedano et al.
Talanta, 146, 310-317 (2015-12-24)
The determination of physiological levels of amino acids is important to aid in the diagnosis and treatment of several diseases and nutritional status of individuals. Amino acids are frequently determined in biofluids such as blood (serum or plasma) and urine;
Antonio de Castro et al.
Metabolites, 8(4) (2018-11-06)
The aim of the present study was to assess the malodorous spoilages of Spanish-style green table olives through microbial and metabolite composition using current measuring techniques (e.g., high-throughput DNA sequencing, headspace solid-phase microextraction combined with gas chromatography-mass spectrometry). Under different
Shuaihua Zhang et al.
Journal of separation science, 38(10), 1711-1720 (2015-03-03)
A novel solid phase microextraction fiber was prepared for the first time by using a sol-gel technique with hydroxypropyl-β-cyclodextrin-functionalized reduced graphene oxide as the fiber coating material. The results verified that the β-cyclodextrin was successfully grafted onto the surface of
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