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Showing 1-30 of 2106 results for "504823" within Papers
Mohammad Saraji et al.
Journal of separation science, 39(18), 3616-3623 (2016-07-28)
We report on the fabrication of a thin-film composite for the extraction of bisphenol A from aqueous solutions. Nylon-6, C18 particles, and polyethylene glycol were used to prepare the thin film sorbent. Bisphenol A was used as a model compound
Initial study of three different pathogenic microorganisms by gas chromatography-mass spectrometry.
Najmeh Karami et al.
F1000Research, 6, 1415-1415 (2018-02-03)
Aleksandra Bojke et al.
Microbiological research, 214, 129-136 (2018-07-23)
Entomopathogenic fungi are fungal species which are used as a potential source of biopesticides. These fungi produce secondary metabolites which in insects can cause disruption in the normal functioning of their bodies, disease or even death. In order to fully
Simone B Soso et al.
Scientific reports, 7(1), 5137-5137 (2017-07-13)
Lions (Panthera leo) use chemical signaling to indicate health, reproductive status, and territorial ownership. To date, no study has reported on both scent and composition of marking fluid (MF) from P. leo. The objectives of this study were to: 1)
Piotr M Kuś et al.
Food research international (Ottawa, Ont.), 106, 243-253 (2018-03-28)
Phacelia tanacetifolia Benth. honey (14 samples) collected in Poland was characterized by melissopalynological analysis, color determination (CIE L*a*b*C
Jian Chen
Analytical chemistry, 89(16), 8366-8371 (2017-07-18)
Headspace solid-phase microextraction (HS-SPME) coupled with gas chromatography-mass spectrometry (GC-MS) is commonly used in analyzing insect volatiles. To improve the detection of volatiles in insects, a freeze-thaw method was applied to insect samples before the HS-SPME-GC-MS analysis. Insect samples were
Jihong Zhang et al.
Plant physiology and biochemistry : PPB, 126, 11-21 (2018-02-27)
Salinity stress can impede development and plant growth adversely. However, there is very little molecular information on NaCl resistance and volatile emissions in Lycopersicum esculentum. In order to investigate the effects of salt stress on the release of volatile compounds
Hiroyuki Kataoka et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 1019, 140-146 (2015-09-10)
A simple and sensitive method for the determination of 8-hydroxy-2'-deoxyguanosine (8-OHdG), a marker of oxidative DNA damage in human urine, was developed using automated on-line in-tube solid-phase microextraction (SPME) coupled with stable isotope-dilution liquid chromatography-tandem mass spectrometry (LC-MS/MS). Creatinine was
Idaira Pacheco-Fernández et al.
Talanta, 158, 125-133 (2016-06-28)
Several crosslinked polymeric ionic liquid (PIL)-based sorbent coatings of different nature were prepared by UV polymerization onto nitinol wires. They were evaluated in a direct-immersion solid-phase microextraction (DI-SPME) method in combination with high-performance liquid chromatography (HPLC) and diode array detection
Matyas Ripszam et al.
Environmental toxicology and chemistry, 34(2), 266-274 (2014-11-14)
Dissolved organic carbon (DOC) plays a key role in determining the environmental fate of semivolatile organic environmental contaminants. The goal of the present study was to develop a method using commercially available hardware to rapidly characterize the sorption properties of
Michiel T O Jonker
Environmental toxicology and chemistry, 35(6), 1371-1377 (2015-11-10)
Octanol-water partition coefficients (KOW ) are widely used in fate and effects modeling of chemicals. Still, high-quality experimental KOW data are scarce, in particular for very hydrophobic chemicals. This hampers reliable assessments of several fate and effect parameters and the
Noorfatimah Yahaya et al.
Biomedical chromatography : BMC, 31(2) (2016-07-31)
A rapid dispersive micro-solid phase extraction (D-μ-SPE) combined with LC/MS/MS method was developed and validated for the determination of ketoconazole and voriconazole in human urine and plasma samples. Synthesized mesoporous silica MCM-41 was used as sorbent in d-μ-SPE of the
Paulo Cardoso et al.
Environmental pollution (Barking, Essex : 1987), 231(Pt 1), 802-811 (2017-09-03)
The volatile metabolome of Rhizobium sp. strain E20-8 exposed to three concentrations of cadmium (2.5, 5.0 and 7.5 μM) was screened using comprehensive two-dimensional gas chromatography coupled to time of flight mass spectrometry (GC × GC-ToFMS), combined with headspace solid phase microextraction (HS-SPME).
Lv Zhou et al.
Journal of the science of food and agriculture, 97(3), 761-769 (2016-05-12)
Head space solid-phase microextraction-gas chromatography-mass spectrometry has been applied to analyze the volatile components of six marine microalgae (Thalassiosira weissflogii, Nitzschia closterium, Chaetoceros calcitrans, Platymonas helgolandica, Nannochloropsis spp. and Dicrateria inornata) from Bacillariophyta, Chlorophyta and Chrysophyta, respectively, in different growth
Yuqin He et al.
Journal of the science of food and agriculture, 98(1), 154-165 (2017-05-27)
Arabica coffee is a sub-tropical agricultural product in China. Coffee undergoes a series of thermal reactions to form abundant volatile profiles after roasting, so it loses a lot of reducing sugars and amino acids. Adding carbonyl compounds with amino acids
Shirin Babaee et al.
Ultrasonics sonochemistry, 34, 847-855 (2016-10-25)
Magnetically separable layered double hydroxide Ni/CuAl-LDH nanocomposites were synthesized and employed as ultrasonic-assisted dispersive micro-solid phase extraction (UA-D-μSPE) sorbent to extract several carboxylic acids (namely propionic, butyric, pentanoic, hexanoic, heptanoic, octanoic, and decanoic) from non-alcoholic beer samples. Ni/CuAl-LDH sorbent was
C Martínez et al.
Water science and technology : a journal of the International Association on Water Pollution Research, 71(1), 117-125 (2015-01-22)
Adsorption of organic substances on reverse osmosis (RO) membrane surfaces may form an organic film on the membrane, known as organic fouling, and cause flow-rate loss. This problem is mostly unavoidable as no pretreatment method exists for perfect removal of
Magdalena Wrona et al.
Talanta, 172, 37-44 (2017-06-13)
Recently oxobiodegradable polyethylene gained popularity as food packaging material due to its potential to reduce polymer waste. However, this type of material can release after its oxidation off-odour compounds that affect the organoleptic properties of packaged food. Odour compounds released
Aristide Maggiolino et al.
Journal of the science of food and agriculture, 99(4), 1660-1667 (2018-09-11)
Cooked meat flavor arises through a combination of thermally generated aroma volatile and nonvolatile compounds in a matrix of muscle fiber, connective tissue, and fat. Ageing could affect meat odor, taste, and flavor by the development of odor compounds in
Anthony J De Lucca et al.
Annals of agricultural and environmental medicine : AAEM, 17(2), 301-308 (2010-12-29)
Toxigenic and atoxigenic strains of Aspergillus flavus were grown on potato dextrose agar (PDA) and wetted (23% moisture) sterile, cracked corn for 14 and 21 days, respectively. Volatile compounds produced by A. flavus, as well as those present in the
Jun Song et al.
Food chemistry, 160, 255-259 (2014-05-07)
Analysis of headspace concentrations of diphenylamine using solid phase micro-extraction (SPME) was examined for its suitability to detect DPA contamination and off-gassing in apple (Malus domestica) fruit, storage rooms and storage materials. Four SPME fibre coatings including polydimethylsiloxane (PDMS, 100
ZnO nanorod array solid phase micro-extraction fiber coating: fabrication and extraction capability.
Dan Wang et al.
Nanotechnology, 20(46), 465702-465702 (2009-10-22)
In this paper, a ZnO nanorod array has been introduced as a coating to the headspace solid phase micro-extraction (HSSPME) field. The coating shows good extraction capability for volatile organic compounds (VOCs) by use of BTEX as a standard and
Adrián Gutiérrez-Serpa et al.
Journal of separation science, 40(9), 2009-2021 (2017-03-07)
The use of solid-phase microextraction coatings based on gold nanoparticles was investigated, focusing the attention on the preparation of nanoparticles with nonclassical reduction agents of HAuCl
Nicolas Kirschner et al.
Analytica chimica acta, 996, 29-37 (2017-11-16)
A sustainable approach to TF-SPME is presented using recycled diatomaceous earth, obtained from a beer purification process, as a green sorbent phase for the determination of bisphenol A (BPA), benzophenone (BzP), triclocarban (TCC), 4-methylbenzylidene camphor (4-MBC) and 2-ethylhexyl-p-methoxycinnamate (EHMC) in
C Guillard et al.
Water research, 36(17), 4263-4272 (2002-11-08)
Solid-phase micro-extraction has been used for identifying, quantifying and following the evolution of intermediate products of octanol degradation by two advanced oxidation treatments (AOTs), photocatalytic and ultrasound processes, inducing mainly the same active species. Headspace extraction enabled direct extraction of
O López-Pérez et al.
Food research international (Ottawa, Ont.), 99(Pt 3), 1002-1010 (2017-09-04)
The volatile fraction of dehydrated edible seaweeds belonging to seven species (Himanthalia elongata, Laminaria ochroleuca, Palmaria palmata, Porphyra umbilicalis, Saccharina latissima, Ulva lactuca and Undaria pinnatifida) was analyzed by gas chromatography-mass spectrometry, after solid-phase microextraction of samples. Thirty-six hydrocarbons, 34
Shuyao Huang et al.
Talanta, 168, 263-268 (2017-04-11)
The concentration of five rapidly metabolized anesthetics in living tilapias was determined in this study, by the presented method coupling in vivo solid phase microextraction (SPME) to gas chromatography-mass spectrometry (GC-MS), which was the first time that in vivo sampling
Shiju Wu et al.
Analytica chimica acta, 935, 113-120 (2016-08-21)
In order to highly enrich two liver cancer biomarkers (hexanal and 2-butanone) in human blood, in this study, natural nontoxic polydopamine/dialdehyde starch/chitosan (PD/DAS/CHI) coating material was synthesized and immobilized on the inner wall of polytetrafluoro-ethlyene (PTFE) tube. It was used
Vidya Hinge et al.
Applied biochemistry and biotechnology, 178(4), 619-639 (2015-10-21)
Aroma volatiles in Basmati-370, Ambemohar-157 (non-basmati scented), and IR-64 (non-scented) rice cultivars were qualitatively and quantitatively analyzed at vegetative and maturity stages to study their differential accumulation using headspace solid-phase microextraction, followed by gas chromatography mass spectrometry (HS-SPME-GCMS) with selected
A Watanabe et al.
Meat science, 107, 12-19 (2015-04-29)
Volatiles in the headspace of beef cooked at 180 °C were analyzed using solid-phase microextraction (SPME) and gas chromatography-mass spectrometry (GC-MS), and the effects of aging were evaluated. Seventy volatile substances including non-aromatic, homocyclic, and heterocyclic compounds were identified. A
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