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Showing 1-30 of 2087 results for "57327-U" within Papers
K Gras et al.
Journal of chromatography. A, 1362, 43-48 (2014-09-10)
A rapid analytical approach for the direct measurement of furfurals such as 2-furfural and 5-methyl-2-furfural at parts-per-billion level in Manuka honey is described. The approach employs a piston-cylinder based liquid-liquid extraction device using chloroform extraction solvent. This device substantially reduces
Sven Geiselhardt et al.
Die Naturwissenschaften, 95(3), 247-251 (2007-09-28)
Males of the genus Parastizopus (Coleoptera: Tenebrionidae) exhibit a special pheromone-emitting behaviour. They do a headstand, expose the aedeagus and remain in this posture for a few seconds. The pheromone emitted by P. transgariepinus was collected by solid-phase micro-extraction (100
Xiaofei Ding et al.
Journal of food science, 80(11), C2373-C2381 (2015-10-08)
The aim of this study was to investigate the dynamic of volatile compounds in the Zaopei during the fermentation and distillation process by headspace solid-phase microextraction-gas chromatography mass spectrometry (HS-SPME-GCMS). Physicochemical properties analysis of Zaopei (fermented grains [FG], fermented grains
Sahar Ghasemi et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 971, 112-119 (2014-10-04)
Methyl-tert-butyl ether (MTBE) is widely used as an antiknock additive for increasing octane number of gasoline. Recently, the in vivo studies demonstrated that MTBE has genotoxic potential and able to form adducts with DNA. In the work, the interactions of
Malik Chalal et al.
Frontiers in plant science, 6, 350-350 (2015-06-05)
Inducing resistance in plants by the application of elicitors of defense reactions is an attractive plant protection strategy, particularly for grapevine (Vitis vinifera), which is susceptible to severe fungal diseases. Although induced resistance (IR) can be successful under controlled conditions
Jeong-Won Kim et al.
Journal of microbiology and biotechnology, 28(1), 50-58 (2017-11-10)
Elephant garlic (
Manikharda et al.
Journal of oleo science, 67(1), 113-123 (2017-12-15)
Shimatogarashi (Capsicum frutescens) is a typical chili pepper domesticated in southern Japan. Important traits of Shimatogarashi peppers, such as color; proportion of organic acids, capsaicinoids, and aromatic compounds; and antioxidant activity in three stages of maturity (green (immature), orange (turning)
María E Fernandez et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 1044-1045, 39-46 (2017-01-12)
To measure bioavailability of the active ingredients of phytogenic feed additives in poultry products and subproducts is a key element for developing a rational understanding of its mode of action and biological effects. Hence, we validated a headspace solid phase
Selenia De Grazia et al.
Talanta, 167, 754-760 (2017-03-28)
The current work presents the optimization of a protocol enabling direct extraction of avocado samples by a new Solid Phase Microextraction matrix compatible coating. In order to further extend the coating life time, pre-desorption and post-desorption washing steps were optimized
A Héctor Hernández-Romero et al.
Marine pollution bulletin, 48(11-12), 1130-1141 (2004-06-03)
The water quality of the Pozuelos-Murillo lagoon system in southern Mexico was evaluated during three periods between March and October 2002, with particular emphasis on the detection of organochlorine and organophosphorous pesticide residues in water and sediments. Physicochemical and microbiological
Daniel Y Pazo et al.
Nicotine & tobacco research : official journal of the Society for Research on Nicotine and Tobacco, 18(9), 1886-1894 (2016-04-27)
A significant portion of the increased risk of cancer and respiratory disease from exposure to cigarette smoke is attributed to volatile organic compounds (VOCs). In this study, 21 VOCs were quantified in mainstream cigarette smoke from 50U.S. domestic brand varieties
Md Nazrul Islam et al.
Frontiers in plant science, 8, 466-466 (2017-04-15)
Tomato (Solanum lycopersicum) production is seriously hampered by the infestation of the sweetpotato whitefly, Bemisia tabaci MEAM 1 (Middle East-Asia Minor 1). The infestation behavior of the whiteflies could be affected by the quantity of plant released volatile organic compounds
F Rossella et al.
Occupational and environmental medicine, 66(8), 509-516 (2009-02-18)
To assess exposure to polycyclic aromatic hydrocarbons (PAHs) using 13 unmetabolised PAHs (U-PAHs) and 12 monohydroxy metabolites (OHPAHs) in urine, and to compare the utility of these biomarkers. 55 male Polish coke oven workers collected urine spot samples after a
Hana Hassan Abbas et al.
Critical reviews in analytical chemistry, 45(3), 226-240 (2015-04-08)
Gas chromatography (GC) and high-performance liquid chromatography (HPLC) coupled to different detectors, and in combination with different sample extraction methods, are most widely used for analysis of triazine herbicides in different environmental samples. Nowadays, many variations and modifications of extraction
F Aladar Bencsath et al.
Analytical and bioanalytical chemistry, 407(14), 4079-4090 (2015-03-23)
A headspace solid-phase microextraction gas chromatography-mass spectrometry (SPME GC-MS) method is described, to screen seafood for volatile organic compounds (VOCs) associated with petrochemical taint. VOCs are extracted from the headspace of heated sample homogenates by adsorption onto a SPME fiber
Aziza El-Beqqali et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 1063, 130-135 (2017-09-02)
Amphetamine selective molecularly imprinted sol-gel polymer tablets, MIP-tablets, for solid-phase microextraction of biofluid samples were prepared. An acetonitrile solution of deuterated amphetamine template and silane precursor, 3-(propylmethacrylate) trimethoxysilane, was soaked into the pores of polyethylene tablet substrates and polymerized by
Abdul Haleem Panhwar et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 138, 296-302 (2014-12-17)
A simple and efficient miniaturized solid phase microextraction (M-SPμE) in a syringe system was developed for preconcentration of cadmium (Cd) in environmental and biological samples, followed by flame atomic absorption technique. The syringe system contains the micropipette tip packed with
Determination of Malondialdehyde in Human Blood by Headspace-Solid Phase Micro-Extraction Gas Chromatography-Mass Spectrometry after Derivatization with 2,2,2-trifluoroethylhydrazine
Shin, H.
Journal of Chromatography. B, Biomedical Applications, 877 (29), 3707-3711 (2009)
Yeh-Chung Chien
The Science of the total environment, 382(2-3), 228-239 (2007-06-02)
This study examines inter-brand, intra-brand and intra-model variations in volatile organic chemical (VOC) levels inside new cars. The effect of temperature on interior VOC levels was examined using model automobiles with and without the air-conditioning running. Potential sources of VOC
Headspace Solid Phase Microextraction/Gas Chromatography-Mass Spectrometry Combined to Chermometric Analysis for Volatile Organic Compounds Determination in Canine Hair: A New Tool to Detect Dog Contamination by Visceral Leishmaniasis
de Oliveira, L.S., et al.
Journal of Chromatography. B, Biomedical Applications, 875 (2), 392-398 (2008)
Volatile Profiles of Human Skin Cell Cultures in Different Degrees of Senescence
Acevedo, C.A., et al.
Journal of Chromatography. B, Biomedical Applications, 878 (3-4), 449-455 (2010)
Jae Kwak et al.
Analytical and bioanalytical chemistry, 408(18), 4927-4934 (2016-05-01)
Selenium has been considered as an essential trace element in mammals and its intake comes mainly from food. Mammals can metabolize both inorganic and organic species, and urinary excretion is the primary elimination route of selenium. Selenosugars and trimethylselenonium ion
Mohamed A Farag et al.
Journal of pharmaceutical and biomedical analysis, 133, 32-40 (2016-11-20)
Among many plant species suitable for preparing toothbrushing sticks, miswak (Salvadora persica, family Salvadoraceae) is found the most effective tool for oral hygiene. S. persica possesses antibacterial, antiviral and antifungal effects against oral microbes, mostly due to its benzyl isothiocyanate
Kanjana Mahattanatawee et al.
Journal of agricultural and food chemistry, 66(10), 2480-2484 (2017-07-07)
Thummong ( Litsea petiolata Hook. f.) is a tree native to southern Thailand. The leaves of this tree are highly aromatic and used to flavor Thai dishes in place of the traditional water beetle Mangdana ( Lethocerus indicus) for religious
Maryam Lashgari et al.
Journal of chromatography. A, 1513, 35-41 (2017-07-28)
The analysis and determination of N-nitrosamines (NAs) in water samples are challenging and demanding. In this study, a simple, reliable, and practical methodology is reported for the quantitative determination by gas chromatography-tandem mass spectrometry with electron impact ionization (EI) and
Silvina A Peirone et al.
Chemphyschem : a European journal of chemical physics and physical chemistry, 15(17), 3848-3854 (2014-09-05)
The products of the gas-phase reactions of OH radicals with 1-pentene and 2-methyl-2-propen-1-ol (221MPO) at T=298±2 K and atmospheric pressure were investigated by using a 4500 L atmospheric simulation chamber that was built especially for this work. The molar yield
Alireza Ghiasvand et al.
Journal of chromatographic science, 54(2), 264-270 (2015-09-06)
Ultrasound-assisted headspace solid-phase microextraction (UA-HS-SPME) and hydrodistillation (HD) methods, coupled to gas chromatography-mass spectrometry (GC-MS), were used for the extraction and analysis of volatile compounds from Hypericum perforatum and Hypericum scabrum collected from two different sites in Iran. In the
Mohammad Saraji et al.
Analytica chimica acta, 926, 55-62 (2016-05-25)
Halloysite nanotubes-titanium dioxide (HNTs-TiO2) as a biocompatible environmentally friendly solid-phase microextraction (SPME) fiber coating was prepared. HNTs-TiO2 was chemically coated on the surface of a fused-silica fiber using a sol-gel process. Parathion as an organophosphorus pesticide was selected as a
Qiu-Lin Li et al.
Journal of chromatography. A, 1374, 58-65 (2014-12-17)
Metal-organic nanotubes (MONTs), a novel class of hybrid materials, have attracted considerable attention because of their uniform and fixed internal diameters, impressive topological structures, and versatile applications. However, to the best of our knowledge, no studies on MONTs coating fabrication
Beatriz Fresco-Cala et al.
Journal of chromatography. A, 1468, 55-63 (2016-10-04)
A novel hybrid micro and meso porous silica monolith with embedded carbon nanoparticles (Si-CNPs monolith) was prepared inside a fused silica capillary (3cm in length) and used as a sorbent for solid-phase microextraction. The hybrid monolithic capillary was synthetized by
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