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Showing 1-30 of 2080 results for "57294-U" within Papers
Shuqin Liu et al.
Analytica chimica acta, 878, 109-117 (2015-05-24)
Mesoporous TiO2 nanoparticles were synthesized with the hydrothermal method and characterized by powder X-ray diffraction (PXRD) and transmission electron microscope (TEM). Then a superior solid-phase microextraction (SPME) fiber was fabricated by sequentially coating the stainless steel fiber with silicone sealant
Tong Dan et al.
Molecules (Basel, Switzerland), 23(4) (2018-04-12)
The lactic acid bacterium Streptococcus thermophilus is a major starter culture for the production of dairy products. In this study, the physiochemical characteristics of milk fermented by the MGA45-4 isolate of S. thermophilus were analyzed. Our data indicate that milk
Microextraction techniques in illicit drug testing: present and future.
Camilla Montesano et al.
Bioanalysis, 8(9), 863-866 (2016-04-21)
Maria Grazia Farbo et al.
International journal of food microbiology, 284, 1-10 (2018-07-11)
Many foods and beverages in temperate and tropical regions are prone to contamination by ochratoxin A (OTA), one of the most harmful mycotoxins for human and animal health. Aspergillus ochraceus and Aspergillus carbonarius are considered among the main responsible for
Alberto Biancardi et al.
Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment, 32(12), 2093-2100 (2015-10-17)
An LC-MS/MS method is proposed for the analysis of sterigmatocystin in cereals and feed. The method is based on a solid-liquid extraction and a dilute-and-shoot approach. Accuracy and precision were established at the LOQ (1 μg kg(-1)); the mean overall
Hiroyuki Kataoka
Bioanalysis, 7(17), 2135-2144 (2015-09-12)
Biomedical analyses of drugs and their metabolites are important in new drug development, therapeutic drug monitoring and forensic toxicology. In these analyses, sample preparation is very important to isolate target compounds from complex biological matrices and markedly influences the reliability
Stephanie Willig et al.
Journal of chromatography. A, 1038(1-2), 11-18 (2004-07-06)
Sampling of odor substances in the emissions from swine production facilities is still the limiting step for routine odor quantification. Solid sorption techniques based on cartridges were developed for three categories of substances (indoles, volatile fatty acids and methylthiol) and
Wenjian Yang et al.
Food chemistry, 196, 860-866 (2015-11-26)
Volatile compounds are important factors that affect the flavor quality of Flammulina velutipes, but the changes occurring during hot air drying is still unclear. To clarify the dynamic changes of flavor components during hot air drying, comprehensive flavor characterization and
Juanjuan Feng et al.
Analytical and bioanalytical chemistry, 407(23), 7025-7035 (2015-07-30)
Ionic liquids (ILs) have been efficiently used as a "designer sorbent" in sample preparation. A novel 1-(3-aminopropyl)-3-(4-vinylbenzyl)imidazolium 4-styrenesulfonate IL monomer was synthesized and copolymerized with 1,6-di(3-vinylimidazolium) hexane bishexafluorophosphate IL as cross-linking agent to prepare a cross-linked polymeric ionic liquids (PILs)
S T Smith et al.
Journal of dairy science, 99(11), 8687-8698 (2016-10-21)
Whey and milk permeates are by-products of high-protein dairy powder manufacture. Previous work has shown that these permeates contribute to salty taste without contributing significantly to sodium content. The objective of this study was to explore the sensory characteristics and
Pamela Vernocchi et al.
Frontiers in cellular and infection microbiology, 2, 156-156 (2012-12-19)
Bacteria colonizing the human intestinal tract exhibit a high phylogenetic diversity that reflects their immense metabolic potentials. The catalytic activity of gut microbes has an important impact on gastrointestinal (GI) functions and host health. The microbial conversion of carbohydrates and
Junlang Qiu et al.
Journal of hazardous materials, 316, 52-59 (2016-05-23)
An in vivo uptake and elimination tracing study based on solid phase microextraction (SPME) was conducted to investigate the accumulation, persistence and distribution of organochloride pesticides (OCPs) and organophosphorus pesticides (OPPs) in malabar spinach (Basella alba L.) plants. Uptake and
Veronika M Lieb et al.
Food chemistry, 248, 238-246 (2018-01-14)
Volatiles of papaya purees from four Costa Rican cultivars were analysed by solid-phase microextraction and gas chromatography-mass spectrometry. A total of 83 volatiles was assigned in the purees, of which 19 were detected for the first time as papaya constituents.
A H Ide et al.
Journal of pharmaceutical and biomedical analysis, 129, 593-599 (2016-08-16)
In this study, the enhancement for trace analysis of sulfonamide antibiotics (sulfathiazole, sulfamethoxazole and sulfadimethoxine) and trimethoprim in water matrices is proposed using bar adsorptive microextraction combined with micro-liquid desorption followed by high-performance liquid chromatography with diode array detection (BAμE-μLD/HPLC-DAD).
Gun Woong Lee et al.
Protoplasma, 253(3), 683-690 (2015-11-05)
Rice bacterial blight, caused by Xanthomonas oryzae pv. oryzae (Xoo), is a severe disease of rice plants. Upon pathogen infection, rice biosynthesizes phytoalexins, including diterpenoids such as momilactones, phytocassanes, and oryzalexins. However, information on headspace volatiles in response to Xoo
Seyed Mohammad Majedi et al.
Journal of chromatography. A, 1486, 86-95 (2016-07-19)
Short-chain aliphatic amines are ubiquitous in the atmospheric environment. They play an important role in the formation and growth of atmospheric particles. As such, there is a pressing need to monitor these particle-bound compounds present at trace quantities. The present
Reza Alizadeh et al.
Analytica chimica acta, 689(1), 117-121 (2011-02-23)
The results of the innovative study on a new stationary phase with high efficiency based on ZnO nano and micro rod coating on fused silica are reported in this paper. ZnO nanorods with a diameter in the range of 70-300
Juan Zheng et al.
Journal of chromatography. A, 1427, 22-28 (2015-12-26)
A combination of nitrogen-doped ordered mesoporous polymer (NOMP) and stainless steel wires led to highly sensitive, selective, and stable solid phase microextraction (SPME) fibers by in situ polymerization for the first time. The ordered structure of synthesized NOMP coating was
Stefano Gentili et al.
Journal of pharmaceutical and biomedical analysis, 129, 282-287 (2016-07-22)
A procedure based on headspace solid-phase microextraction (HS-SPME) coupled with gas chromatography/mass spectrometry (GC/MS) has been developed for the determination of most commonly used drugs of abuse in sweat of drivers stopped during roadside controls. DrugWipe 5A sweat screening device
Honglian Yu et al.
Journal of chromatography. A, 1438, 10-21 (2016-02-22)
Neat crosslinked polymeric ionic liquid (PIL) sorbent coatings for solid-phase microextraction (SPME) compatible with high-performance liquid chromatography (HPLC) are reported for the first time. Six structurally different PILs were crosslinked to nitinol supports and applied for the determination of select
Susanna Vogliardi et al.
Analytica chimica acta, 857, 1-27 (2015-01-22)
Hair analysis has assumed increasing importance in the determination of substances of abuse, both in clinical and forensic toxicology investigations. Hair analysis offers particular advantages over other biological matrices (blood and urine), including a larger window of detection, ease of
Monica R Loizzo et al.
Journal of the science of food and agriculture, 94(11), 2179-2186 (2013-12-18)
The aim of this study is to evaluate, for the first time, the chemical profile, antioxidant properties and cholinesterase inhibitory activity of dried fruits and honey of Ficus carica (fig) cultivars Dottato, Citrullara, and San Francesco. Gas chromatography-mass spectrometry (GC-MS)
Miyi Yang et al.
Food chemistry, 197 Pt B, 1064-1072 (2015-12-18)
A green, simple, inexpensive dispersive solid-phase microextraction method coupled with high-performance liquid chromatography was developed for rapid screening and selective recognition of benzoylurea insecticides (BUs) in honey and tea beverages. A novel adsorbent, ionic liquid (IL)-modified β-cyclodextrin/attapulgite (β-CD/ATP), was prepared
Jim Van Durme et al.
Food chemistry, 205, 66-72 (2016-03-24)
Today, the cocoa industry is in great need of faster and robust analytical techniques to objectively assess incoming cocoa quality. In this work, inline roasting hyphenated with a cooled injection system coupled to a gas chromatograph-mass spectrometer (ILR-CIS-GC-MS) has been
Vilma Kaškonienė et al.
Natural product research, 30(12), 1373-1381 (2015-07-30)
Since biological activity of medicinal plants is dependent on cultivation area, climatic conditions, developmental stage, genetic modifications and other factors, it is important to study flora present in different growing sites and geographical zones. This study was focused on screening
Chinthaka A Seneviratne et al.
Rapid communications in mass spectrometry : RCM, 30(1), 89-94 (2015-12-15)
Ambient mass spectrometry can detect small molecules directly, but complex mixtures can be a challenge. We have developed a method that incorporates small molecule separation based on laser desorption with capture on a solid-phase microextraction (SPME) fiber for injection into
Paweł Mochalski et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 959, 62-70 (2014-04-29)
Gas chromatography with mass spectrometric detection (GC-MS) coupled with solid phase micro-extraction as pre-concentration method (SPME) was applied to identify and quantify volatile organic compounds (VOCs) emitted by human skin. A total of 64 C4-C10 compounds were quantified in skin
Weiqian Liang et al.
Journal of chromatography. A, 1491, 9-15 (2017-02-27)
In this work, a barley husk biomaterial was successfully carbonized by hydrothermal method. The carbon had a high specific surface area and good stability. It was coated onto a stainless steel wire through sol-gel technique to prepare a solid-phase microextraction
William D Kranz et al.
Analytical and bioanalytical chemistry, 406(30), 7817-7825 (2014-11-27)
Genuine explosive materials are traditionally employed in the training and testing of explosive-detecting canines so that they will respond reliably to these substances. However, challenges arising from the acquisition, storage, handling, and transportation of explosives have given rise to the
Rosa Perestrelo et al.
Talanta, 144, 382-389 (2015-10-11)
Leukotriene B4 (LTB4) is a potent mediator of inflammation and plays a key function in the pathophysiology of chronic asthma. Detectable urinary levels of LTB4, arises from the activation of leukotriene pathways. In this study an ultra-fast, selective and sensitive
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