Showing 1-21 of 21 resultados for "309206"
Angela Kaltenbach et al.
Analytical and bioanalytical chemistry, 407(11), 3093-3102 (2014-12-19)
Gravimetrically prepared mono-elemental reference solutions having a well-known mass fraction of approximately 1 g/kg (or a mass concentration of 1 g/L) define the very basis of virtually all measurements in inorganic analysis. Serving as the starting materials of all standard/calibration solutions, they...
Kara Strickland et al.
Nature communications, 6, 7343-7343 (2015-06-11)
Replacement of noble metals in catalysts for cathodic oxygen reduction reaction with transition metals mostly create active sites based on a composite of nitrogen-coordinated transition metal in close concert with non-nitrogen-coordinated carbon-embedded metal atom clusters. Here we report a non-platinum...
Andreas Reisch et al.
ACS nano, 9(5), 5104-5116 (2015-04-22)
Ultrasmall polymer nanoparticles are rapidly gaining importance as nanocarriers for drugs and contrast agents. Here, a straightforward modular approach to efficiently loaded and stable sub-20-nm polymer particles is developed. In order to obtain ultrasmall polymer nanoparticles, we investigated the influence...
Simone Pollastri et al.
Journal of hazardous materials, 298, 282-293 (2015-06-16)
Although asbestos represents today one of the most harmful contaminant on Earth, in 72% of the countries worldwide only amphiboles are banned while controlled use of chrysotile is allowed. Uncertainty on the potential toxicity of chrysotile is due to the...
Pablo E Guzmán et al.
Angewandte Chemie (International ed. in English), 53(48), 13083-13087 (2014-10-01)
A regio-, diastereo-, and enantioselective [4+3] cycloaddition between vinylcarbenes and dienes has been achieved using the dirhodium tetracarboxylate catalyst [Rh2(S-BTPCP)4]. This methodology provides facile access to 1,4-cycloheptadienes that are regioisomers of those formed from the tandem cyclopropanation/Cope rearrangement reaction of...
Yang Chen et al.
Journal of AOAC International, 97(4), 1143-1150 (2014-08-26)
A proficiency test (PT) program for determination of total As in apple juice samples was conducted by the Food Emergency Response Network (FERN) laboratories. An analytical method using inductively coupled plasma (ICP)-MS was validated for this project. The LOD and...
Thibault Cavey et al.
Biometals : an international journal on the role of metal ions in biology, biochemistry, and medicine, 28(4), 733-743 (2015-06-05)
Iron is reported to interact with other metals. In addition, it has been shown that genetic background may impact iron metabolism. Our objective was to characterize, in mice of three genetic backgrounds, the links between iron and several non-iron metals....
Scott R Pollack et al.
Journal of labelled compounds & radiopharmaceuticals, 58(11-12), 433-441 (2015-09-19)
Omeprazole (Prilosec®) is a selective and irreversible proton pump inhibitor used to treat various medical conditions related to the production of excess stomach acids. It functions by suppressing secretion of those acids. Radiolabeled compounds are commonly employed in the drug...
María Garrido et al.
Chembiochem : a European journal of chemical biology, 16(4), 641-650 (2015-02-14)
Several diseases involve alterations in sphingolipid metabolism, so the development of tools for the analysis of sphingolipid metabolic fluxes is of interest. In this work, ω-azidosphingolipids 1-3 have been synthesized and tested as tracers in live cells. The synthesis starts...
Salah Al Zadjali et al.
International journal of clinical and experimental medicine, 8(5), 7160-7167 (2015-07-30)
Lead is a widely-spread environmental pollutant and a commonly-used industrial chemical that can cause multisystemic adverse health effects. However, the effects of lead exposure on diabetic animals have not been reported so far. The aim of this study is to...
Chumin Zhao et al.
Medical physics, 42(11), 6294-6308 (2015-11-02)
Large area x-ray imagers based on complementary metal-oxide-semiconductor (CMOS) active pixel sensor (APS) technology have been proposed for various medical imaging applications including digital breast tomosynthesis (DBT). The low electronic noise (50-300 e-) of CMOS APS x-ray imagers provides a...
Dong Jin Lee et al.
Angewandte Chemie (International ed. in English), 54(46), 13715-13718 (2015-09-18)
A new type of intermolecular rhodium(II)-catalyzed [5+3] cycloaddition has been developed. This higher-order cycloaddition between pyridinium zwitterion 1,5-dipole equivalents and enol diazoacetates enables the formation of eight-membered heterocyclic skeletons, which are otherwise difficult to construct. The optimized cycloaddition occurs efficiently under...
Dipti Patel et al.
Dalton transactions (Cambridge, England : 2003), 44(31), 14159-14177 (2015-07-18)
Treatment of anhydrous FeX2 (X = Cl, Br, I) with one equivalent of bis(diphenylphosphino)ethane (dppe) in refluxing THF afforded analytically pure white (X = Cl), light green (X = Br), and yellow (X = I) [FeX2(dppe)]n (X = Cl, ;...
Xiangyang Bi et al.
Journal of hazardous materials, 297, 191-197 (2015-05-11)
In this study, ground surface dust samples from two contrasting areas, a former zinc smelting area in Guizhou Province and a common urban district in Wuhan city, Hubei Province, China, were assessed for in vitro Pb bioaccessibility using a physiologically...
Vania B Rezende et al.
Journal of trace elements in medicine and biology : organ of the Society for Minerals and Trace Elements (GMS), 29, 130-135 (2014-07-24)
Although a number of studies have measured circulating levels of some trace elements in preeclampsia (PE) and compared to healthy pregnant (HP), there is no consensus yet about the deficiency of some metals and development of hypertensive disorders in pregnancy....
C Afonso et al.
Environmental research, 143(Pt B), 130-137 (2015-05-13)
The Se, Hg, and methylmercury (MeHg) levels in raw, cooked (boiled and grilled), and canned tuna (Thunnus spp.) were determined before and after an in vitro digestion, thereby enabling the calculation of the respective bioaccessibility percentages. A risk-benefit evaluation of...
The ONIOM Method and Its Applications.
Lung Wa Chung et al.
Chemical reviews, 115(12), 5678-5796 (2015-04-09)
Yang Yang et al.
Environmental science & technology, 48(20), 12362-12369 (2014-09-16)
Disinfectants inactivate pathogens in source water; however, they also react with organic matter and bromide/iodide to form disinfection byproducts (DBPs). Although only a few DBP classes have been systematically analyzed for toxicity, iodinated and brominated DBPs tend to be the...
Malene Outzen et al.
Nutrients, 7(1), 608-624 (2015-01-20)
Selenium status of the Danish population is below that assumed optimal for the suggested protective effects against chronic diseases, including certain cancers. Fish and shellfish are important dietary sources of selenium in Denmark. We investigated the effect of increased fish...
D Sirbu et al.
Dalton transactions (Cambridge, England : 2003), 44(33), 14646-14655 (2015-07-28)
Copper(ii) and palladium(ii) meso-tetraferrocenylporphyrins ( and ) were employed as catalysts for electrochemical proton reduction in DMF using trifluoroacetic acid (TFA) or triethylamine hydrochloride (TEAHCl) as acids. Gas analysis under electrocatalytic conditions at a glassy carbon working electrode confirmed the...
Anna V Vologzhanina et al.
Inorganic chemistry, 54(12), 5827-5838 (2015-05-29)
Template condensation of dichloroglyoxime with n-hexadecylboronic acid on the corresponding metal ion as a matrix under vigorous reaction conditions afforded n-hexadecylboron-capped iron and cobalt(II) hexachloroclathrochelates. The complexes obtained were characterized using elemental analysis, MALDI-TOF mass spectrometry, IR, UV-vis, (1)H and...

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