Search Within
Applied Filters:
Showing 1-30 of 2054 results for "


" within Papers
Irene Catanzaro et al.
Journal of hazardous materials, 185(2-3), 591-597 (2010-10-20)
The aim of this work was to study the biological effects of four monoterpenes, i.e. α-pinene, β-pinene, 3-carene and D-limonene present in the wastewater of a citrus transformation factory. The study was carried out by exposing V79 Chinese hamster cells
Liu Yang et al.
Journal of chromatography. A, 1471, 80-86 (2016-10-22)
In this work, a novel poly(3,4-ethylenedioxythiophene)@Au nanoparticles (PEDOT@AuNPs) hybrid coating was prepared and characterized. Firstly, the monomer 3,4-ethylenedioxythiophene was self-assembled on AuNPs, and then electropolymerization was performed on a stainless steel wire by cyclic voltammetry. The obtained PEDOT@AuNPs coating was
Jun Gao et al.
Talanta, 167, 8-13 (2017-03-28)
Advances in sample nebulization and injection technology have significantly reduced the volume of solution required for trace impurity analysis in plutonium and uranium materials. Correspondingly, we have designed and tested a novel chip-based microfluidic platform, containing a 100-µL or 20-µL
Simonetta Tumbiolo et al.
Analytical and bioanalytical chemistry, 380(5-6), 824-830 (2004-11-02)
The aim of the study was to analyse BTEX compounds (benzene, toluene, ethylbenzene, xylenes) in air by solid phase micro-extraction/gas chromatography/mass spectrometry (SPME/GC/MS), and this article presents the features of the calibration method proposed. Examples of real-world air analysis are
Liqiang Zhang et al.
Journal of food science (2016-10-16)
Present study was to characterize the physiochemical properties, free amino acids (FAAs), volatiles and microbial communities of various moromi, respectively sampled from different stages of high-salt dilute-state (HSDS) and low-salt solid-state (LSSS) fermentation, using multiphase analyzing methods. Phospholipid fatty acids
Natara D B Castilhos et al.
Carbohydrate polymers, 174, 507-516 (2017-08-20)
A novel alginate based hydrogel was successfully prepared and tested for the solid phase microextraction of medium-to-high polarity compounds, when supported in a polypropylene (PP) fiber. Pure alginate when added onto the surface of the PP fiber, resulted in a
Miklós Görgényi et al.
Chemosphere, 59(8), 1083-1090 (2005-04-19)
The Ostwald solubility coefficient, L of 17 volatile organic compounds (VOCs) from the gas phase into water and dilute aqueous ammonia solutions was determined by the equilibrium partitioning in closed system-solid phase micro extraction (EPICS-SPME) method at 303 K and
Francisco Pena-Pereira et al.
Analytical chemistry, 86(23), 11640-11648 (2014-11-06)
In this work, hybrid silica-based materials with immobilized ionic liquids (ILs) were prepared by sol-gel technology and evaluated as solid-phase microextraction (SPME) fiber coatings. High loadings of the IL 1-methyl-3-butylimidazolium bis(trifluoromethylsulfonyl)imide ([C4MIM][TFSI]) were confined within the hybrid network. Coatings composition
Mario F Mirabelli et al.
Analytical chemistry, 90(8), 5015-5022 (2018-03-15)
A novel capillary ionization source based on atmospheric pressure photoionization (cAPPI) was developed and used for the direct interfacing between solid-phase microextraction (SPME) and mass spectrometry (MS). The efficiency of the source was evaluated for direct and dopant-assisted photoionization, analyzing
Jevgeni Parshintsev et al.
Journal of chromatography. A, 1376, 46-52 (2014-12-30)
Alkylamines play an important role in atmospheric chemistry and are of concern for human health. Determining them from the vapor phase is challenging owing to their high polarity and volatility, water solubility, low concentrations, and poor chromatographic properties. We propose
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
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
Hongshuang Tong et al.
Cancer cell international, 17, 108-108 (2017-12-05)
Gastric cancer ranks 4th among the most common cancers worldwide, and the mortality caused by gastric cancer is 2nd only to lung cancer. Gastric cancer shows a lack of specific symptoms in its early stages. In addition, its clinical symptoms
Omprakash Nacham et al.
Analytical chemistry, 89(20), 10661-10666 (2017-09-06)
In this study, a solid-phase microextraction (SPME) method was developed for the purification of mRNA (mRNA) from complex biological samples using a real-time reverse transcription quantitative polymerase chain reaction (RT-qPCR) assay for quantification. The chemical composition of the polymeric ionic
Jianxin Fu et al.
Molecules (Basel, Switzerland), 22(3) (2017-03-12)
Floral scent is an important part of volatile organic compounds (VOCs) emitted from plants, and is influenced by many environmental and endogenous factors. To investigate the influence of temperature on the emission of the floral scent of
G Allen Burton et al.
Environmental pollution (Barking, Essex : 1987), 162, 449-456 (2011-12-21)
In situ-based testing using aquatic organisms has been widely reported, but is often limited in scope and practical usefulness in making decisions on ecological risk and remediation. To provide this capability, an integrated deployment system, the Sediment Ecotoxicity Assessment (SEA)
E J H Wee et al.
Chemical communications (Cambridge, England), 51(27), 5828-5831 (2015-01-27)
Developing molecular diagnostics in resource-poor settings is challenging. As such, we purpose-built a novel bridging flocculation assay for qualitative evaluation of isothermally amplified DNA by naked eye. The flocculation assay was dependent on pH, DNA polymer amounts and lengths. The
Loreto Prat et al.
Journal of the science of food and agriculture, 94(4), 752-759 (2013-10-12)
Fragaria chiloensis (L.) Mill spp. chiloensis form chiloensis, is a strawberry that produces white fruits with unique aromas. This species, endemic to Chile, is one of the progenitors of Fragaria x ananassa Duch. In order to identify the volatile compounds
Stefano Dugheri et al.
International journal of occupational medicine and environmental health (2018-02-08)
In order to assess short-term exposure to peracetic acid (PAA) in disinfection processes, the Authors compared 4 industrial hygiene monitoring methods to evaluate their proficiency in measuring airborne PAA concentrations. An active sampling by basic silica gel impregnated with methyl
Katharina Witt et al.
Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference, 2011, 3664-3667 (2012-01-19)
The objective of this study was to prove the general applicability of an electronic nose for analyzing exhaled breath considering the dependency on smoking. At first, odor compounds from spices (n=6) were detected via the electronic nose and further characterized
Federico Magagna et al.
Analytica chimica acta, 936, 245-258 (2016-08-28)
Comprehensive two-dimensional gas chromatography (GC × GC) is the most effective multidimensional separation technique for in-depth investigations of complex samples of volatiles (VOC) in food. However, each analytical run produces dense, multi-dimensional data, so elaboration and interpretation of chemical information is challenging.
Ileana-Andreea Ratiu et al.
Journal of breath research, 11(3), 036012-036012 (2017-06-27)
Escherichia coli (E. coli) is a Gram-negative coliform bacterium that is commonly found in the lower intestine of warm-blooded organisms. Most of the strains are harmless but some serotypes are pathogenic, meaning they can cause illness, either diarrhea or illness
Chen Wang et al.
Environmental science & technology, 48(22), 13238-13245 (2014-10-17)
The presence of inorganic salts significantly influences the partitioning behavior of organic compounds between environmentally relevant aqueous phases, such as seawater or aqueous aerosol, and other, nonaqueous phases (gas phase, organic phase, etc.). In this study, salting-out coefficients (or Setschenow
Haijing Wang et al.
The Science of the total environment, 530-531, 38-44 (2015-06-01)
Pipelines are convenient, economical and widely used mode of transportation of crude oil. However, the inevitable or otherwise accidents during such transport of crude oil lead to large scale oil spills, which consequently result in both soil and air pollution.
Di Chen et al.
Journal of chromatography. A, 1493, 57-63 (2017-03-16)
A fully automated in-tube solid phase microextraction/liquid chromatography-post column derivatization-mass spectrometry (in-tube SPME/LC-PCD-MS) method was developed for the analysis of urinary hexanal and heptanal. Online in-tube SPME enabled effective enrichment of the low level aldehydes and elimination of matrix interferences.
Huan Cheng et al.
Molecules (Basel, Switzerland), 23(7) (2018-07-06)
The dried cubeb berries are widely used as medicinal herb and spicy condiment with special flavor. However, there is a significant definition discrepancy for cubeb berries. In this study, an efficient analytical method to characterize and discriminate two popular cubeb
Fatemeh Mousavi et al.
Journal of proteome research, 15(3), 963-975 (2016-01-27)
Sampling and sample preparation plays an important role in untargeted analysis as it influences final composition of the analyzed extract and consequently reflection of the metabolome. In the current work, mechanism of bactericidal action of cinnamaldehyde (CA) against Escherichia coli
Afshin Rajabi Khorrami et al.
Analytica chimica acta, 727, 20-25 (2012-05-01)
In this work, a molecular sol-gel imprinting approach has been introduced to produce a fiber coating for selective direct immersion solid-phase microextraction (SPME) of caffeine. The polymerization mixture was composed of vinyl trimethoxysilane and methacrylic acid as vinyl sol-gel precursor
Hamed Piri-Moghadam et al.
Angewandte Chemie (International ed. in English), 55(26), 7510-7514 (2016-05-10)
Herein we report the development of solid-phase microextraction (SPME) devices designed to perform fast extraction/enrichment of target analytes present in small volumes of complex matrices (i.e. V≤10 μL). Micro-sampling was performed with the use of etched metal tips coated with a
Estelle Pionnier et al.
Journal of agricultural and food chemistry, 52(3), 557-564 (2004-02-05)
This study aims to follow the kinetics of aroma compound release during model cheese consumption in order to clarify the relationships between flavor release and some oral parameters. Eight subjects participated in the study. Breathing, salivation, chewing, and swallowing were
Page 1 of 69
Page 1 of 69