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Showing 1-30 of 150 results for "227048" within Papers
Susana Grimalt et al.
Analytical and bioanalytical chemistry, 407(11), 3083-3091 (2015-01-30)
The feasibility of the production of a reference material for pesticide residue analysis in a cucumber matrix was investigated. Cucumber was spiked at 0.075 mg/kg with each of the 15 selected pesticides (acetamiprid, azoxystrobin, carbendazim, chlorpyrifos, cypermethrin, diazinon, (α + β)-endosulfan, fenitrothion, imazalil
Paz Otero et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 997, 229-235 (2015-07-03)
An improved gas chromatography-mass spectrometry (GC-MS) method for simple, rapid and precise quantification of phthalates in drinking water is presented. This method was validated for bis (2-n-butoxyethyl) phthalate (DBEP), bis (2-n-ethylhexyl) phthalate (DEHP), butyl benzyl phthalate (BBP), di-butyl phthalate (DBP)
Fotini A Trikka et al.
BMC genomics, 16, 935-935 (2015-11-18)
Salvia diterpenes have been found to have health promoting properties. Among them, carnosic acid and carnosol, tanshinones and sclareol are well known for their cardiovascular, antitumor, antiinflammatory and antioxidant activities. However, many of these compounds are not available at a
Jianhua Xu et al.
The journal of physical chemistry. B, 119(11), 4230-4239 (2015-02-25)
Time dependent fluorescence Stokes (emission wavelength) shifts (TDFSS) from tryptophan (Trp) following sub-picosecond excitation are increasingly used to investigate protein dynamics, most recently enabling active research interest into water dynamics near the surface of proteins. Unlike many fluorescence probes, both
Jong Guk Kim et al.
ChemSusChem, 8(10), 1752-1760 (2015-04-25)
A hybrid composite system of MnCo2 O4 nanowires (MCO NWs) anchored on reduced graphene oxide (RGO) nanosheets was prepared as the bifunctional catalyst of a Li-O2 battery cathode. The catalysts can be obtained from the hybridization of one-dimensional MCO NWs
Marek Roszko et al.
Marine pollution bulletin, 96(1-2), 165-175 (2015-05-24)
Low pg levels of PBDD/Fs in 0.8-38.9 pg g(-1) (fat) range (mean 14.2 pg g(-1)) observed in the tested cod liver samples were significantly lower than levels of their chlorinated analogues (25.1-95.9 range, 37.7 mean pg g(-1) fat). Brominated furans
Jinghan Tian et al.
The Analyst, 140(15), 5301-5307 (2015-06-16)
A core-shell structured molecularly imprinted polymer on upconverting nanoparticles (UCNPs@MIP) was synthesized for the fluorescence (FL) sensing of sulfamethazine (SMZ). Hexagonal UCNPs were synthesized by the solvothermal method, then coated with a thin silica shell and modified with vinyl groups.
Fa Zhang et al.
Microbial cell factories, 14, 175-175 (2015-11-07)
Escherichia coli has emerged as a promising platform microorganism to produce biofuels and fine chemicals of industrial interests. Certain obstacles however remain to be overcome, among which organic-solvent tolerance is a crucial one. We used global transcription machinery engineering (gTME)
Lutz Ahrens et al.
Journal of chromatography. A, 1405, 1-11 (2015-06-20)
Five different passive sampler devices were characterized under laboratory conditions for measurement of 124 legacy and current used pesticides in water. In addition, passive sampler derived time-weighted average (TWA) concentrations were compared to time-integrated active sampling in the field. Sampling
Didier Diomande et al.
Food chemistry, 188, 576-582 (2015-06-05)
Multi-element stable isotope ratios have been assessed as a means to distinguish between fermented cocoa beans from different geographical and varietal origins. Isotope ratios and percentage composition for C and N were measured in different tissues (cotyledons, shells) and extracts
Sandra Yucra et al.
Environmental health : a global access science source, 7, 59-59 (2008-11-19)
Organophosphates are broad class of chemicals widely used as pesticides throughout the world. We performed a cross-sectional study of associations between dialkylphosphate metabolites of organophosphates and semen quality among pesticide applicators in Majes (Arequipa), Peru. Thirty-one men exposed to organophosphate
Joséphine K Ntumba et al.
Lipids, 50(3), 313-322 (2014-12-30)
The total oil production capacity of isano oil is estimated at about 10,000 tons annually. Previous studies of this oil revealed that it is rich in fatty acids including a conjugated diyne moiety. This makes isano oil an excellent candidate
Roberto Depasquale et al.
AAPS PharmSciTech, 16(3), 589-600 (2014-11-16)
This study investigated the structural relaxation of micronized fluticasone propionate (FP) under different lagering conditions and its influence on aerodynamic particle size distribution (APSD) of binary and tertiary carrier-based dry powder inhaler (DPI) formulations. Micronized FP was lagered under low
Bin Huang et al.
Environmental science and pollution research international, 21(22), 12898-12908 (2014-07-01)
The occurrence and behavior of endocrine disrupting chemicals (EDCs) in sewage treatment plants (STPs), especially estrogens and phenols, have been closely concerned in previous studies. However, the systematical researches about progestogens and androgens were scarce in STPs adopting different treatment
Xizheng Yan et al.
Nicotine & tobacco research : official journal of the Society for Research on Nicotine and Tobacco, 17(11), 1324-1330 (2015-02-05)
We developed a high throughput method for estimating smoker's mainstream smoke intake on a per-cigarette basis by analyzing discarded cigarette butts. This new method utilizes ultraviolet/visible (UV-Vis) spectrophotometric analysis of isopropanol-soluble smoke particulate matter extracted from discarded cigarette filters. When
Thomas Berg et al.
Journal of chromatography. A, 1344, 83-90 (2014-05-02)
Stable isotope-labeled internal standards (SIL-ISs) are often used when applying liquid chromatography-tandem mass spectrometry (LC-MS/MS) to analyze for legal and illegal drugs. ISs labeled with (13)C, (15)N, and (18)O are expected to behave more closely to their corresponding unlabeled analytes
Lorenzo Boggia et al.
BMC plant biology, 15, 102-102 (2015-04-19)
The dynamics of plant volatile (PV) emission, and the relationship between damaged area and biosynthesis of bioactive molecules in plant-insect interactions, remain open questions. Direct Contact-Sorptive Tape Extraction (DC-STE) is a sorption sampling technique employing non adhesive polydimethylsiloxane tapes, which
Juan A Ramos Guivar et al.
Talanta, 141, 307-314 (2015-05-13)
Magnetic nanoparticles have been applied in many areas of nanomedicine. Sensing platforms based on this type of nanoparticles have received attention due to the relative low cost and biocompatibility. Biosensor is the most widely investigated type of analytical device. This
Rebecca L Cordell et al.
Analytical and bioanalytical chemistry, 406(22), 5283-5292 (2014-06-21)
Biomass burning is becoming an increasing contributor to atmospheric particulate matter, and concern is increasing over the detrimental health effects of inhaling such particles. Levoglucosan and related monosaccharide anhydrides (MAs) can be used as tracers of the contribution of wood
R Antony et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 149, 550-557 (2015-05-20)
Chitosan (a biopolymer) anchored Cu(II) and Ni(II) Schiff base complexes, [M(OIAC)Cl2] (M: Cu/Ni and OIAC: ([2-oxo-1H-indol-3-ylidene]amino)chitosan) were electron beam irradiated by different doses (100 Gy, 1 kGy and 10 kGy). The electron beam has shown potential impact on biopolymer's support
Osamu Kiguchi et al.
Journal of chromatography. A, 1370, 246-254 (2014-12-03)
To assess food safety emergencies caused by highly hazardous chemical-tainted foods, simultaneous analysis of organophosphorus insecticides in fatty foods such as precooked foods was conducted using thin-layer chromatography/direct analysis in real time time-of-flight mass spectrometry (TLC/DART-TOFMS) and isotope dilution technique.
Minoru Yamaji et al.
Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology, 14(9), 1673-1684 (2015-07-07)
Photochemical processes of 4-tert-butyl-4'-methoxydibenzoylmethane (Avobenzone, AB), 4-phenylbenzoylbenzoyl-, 4-phenylbenzoyl-2'-furanyl- and 4-phenylbenzoyl-2'-thenoylmethanes (PB@Ph, PB@F and PB@T, respectively) substituted with Br and Cl at the C2 position were studied by stationary and laser flash photolyses in solution. The absorption spectral features showed that
Nataša Šegatin et al.
Foods (Basel, Switzerland), 9(7) (2020-07-12)
The dielectric properties of six refined edible oils with different fatty-acid compositions were determined for oils incubated at 180 °C up to 40 h. The oil degradation was evaluated by the dielectric dispersion and dielectric loss in the frequency range
Aseel M Bala et al.
The journal of physical chemistry. A, 124(16), 3077-3089 (2020-03-18)
Hydrogen bonding has profound effects on the behavior of molecules. Fourier-transform infrared spectroscopy is the technique most commonly used to qualitatively identify hydrogen-bonding moieties present in a chemical sample. However, quantitative analysis of infrared (IR) spectra is nontrivial for the
Ying Tong et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 978-979, 173-178 (2015-01-01)
To study the systemic exposure of tazarotene formulation after topical administration, a liquid chromatography-tandem mass spectrometry (LC-MS/MS) method was developed and validated for the simultaneous determination of tazarotene and tazarotenic acid in minipig plasma. Similar extraction recoveries for both analytes
Delphine Parrot et al.
Phytochemical analysis : PCA, 26(1), 23-33 (2014-08-19)
Lichens are self-sustaining partnerships comprising fungi as shape-forming partners for their enclosed symbiotic algae. They produce a tremendous diversity of metabolites (1050 metabolites described so far). A comparison of metabolic profiles in nine lichen species belonging to three genera (Lichina
Masakazu Nagafuku et al.
Glycobiology, 25(3), 303-318 (2014-10-12)
Ganglioside GM3 (Siaα2-3Galβ1-4Glcβ1-1Cer) has been known to participate in insulin signaling by regulating the association of the insulin receptor in caveolae microdomains (lipid rafts), which is essential for the execution of the complete insulin metabolic signaling in adipocytes. Macrophage-secreted factors
Fanny Hildmann et al.
Journal of chromatography. A, 1403, 1-20 (2015-06-09)
A sample preparation method was developed for the analysis of chicken eggs to determine 97 GC and 81 LC amenable residues, including organophosphates, organochlorines, pyrethroids, triazoles, carboxyl-containing compounds, and the indicator PCBs. Hereby, considerations were given to the recoveries of
Shakiba Shahabi et al.
ACS applied materials & interfaces, 7(25), 13821-13833 (2015-06-02)
To study the importance of the surface charge for cellular uptake of silica nanoparticles (NPs), we synthesized five different single- or multifunctionalized fluorescent silica NPs (FFSNPs) by introducing various ratios of amino and sulfonate groups into their surface. The zeta
Samuel Kim et al.
Methods in enzymology, 472, 119-132 (2010-06-29)
Microfluidics serves as a convenient platform for single-molecule experiments by providing manipulation of small amounts of liquids and micron-sized particles. An adapted version of capillary electrophoresis (CE) on a microchip can be utilized to separate chemical species with high resolution
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