Search results for "Roca"
showing 10 items of 1893 documents
Korelācija starp ehokardiogrammu un EKG atradni slimniekiem ar kreisā kambara hipertorfiju
2018
KOPSAVILKUMS Pamatojums Kreisā kambara hipertrofijai tiek pievērsta uzmanība globālā līmenī. Kreisā kambara hipertrofijas esamība un tās pakāpes novērtēšana ir neatņemama sastāvdaļa ikdienā veiktiem mērījumiem kardioloģijā. Gan ehokardiogrāfija (EhoKG), gan elektrokardiogrāfija (EKG) ir labi zināmas metodes kreisā kamabara hipertrofijas un ar to saistītā riska novērtēšanai. Kreisā kambara hipertrofija tiek uzskatīta par neatkarīgu kardiovaskulārās mirstības un saslimstības riska faktoru. Mērķis Noteikt kreisā kambara hipertrofijas pazīmes, izmantojot elektrokardiogrāfijas un ehokardiogrāfijas metodes, un noskaidrot korelāciju starp kreisā kambara hipertrofijas pazīmēm EKG un EhoKG, kā arī n…
Characterization and source identification of polycyclic aromatic hydrocarbons (PAHs) in river bank soils.
2008
Elevated PAH concentrations were detected in bank soils along the Mosel and Saar Rivers in Germany. Information on the identification of PAH sources in this area however remains unclear. This study was able to characterize the PAH sources by application of several approaches, including consideration of the distribution patterns of 45 PAHs (including 16 EPA PAHs and some alkyl PAHs), specific PAH ratios, distribution patterns of n-alkanes and principal component analysis (PCA). In addition, the efficiency of the tested approaches was assessed. The results from the application of the various source identification methods showed that pyrogenic PAHs dominate soil samples collected upstream of t…
Inquinamento da rifiuti prodotti dalle navi
2013
Multi‐residue extraction to determine organic pollutants in mussel hemolymph
2021
This study assesses the extraction of eleven pharmaceuticals, five pesticides, five perfluoroalkyl substances, and two illicit drugs in hemolymph from (Mytilus Galloprovincialis). Four extraction procedures using Phree™ Phospholipid Removal cartridges were tested using different volumes of methanol (400 and 600 μL) and acetonitrile (300 and 450 μL). The pollutants were determined by high-performance liquid chromatography–tandem mass spectrometry. The use of methanol gave several problems during the extraction procedure, such as longer times and sample loss. Three methods (acetonitrile 300 and 450 μL; and methanol 600 μL) were validated. Recoveries at three concentration levels (5, 50, and 1…
Preparation and evaluation of lauryl methacrylate monoliths with embedded silver nanoparticles for capillary electrochromatography
2012
In this article, capillary columns constituted by lauryl methacrylate monoliths with embedded silver nanoparticles (AgNPs) were developed and tested. Two incorporation approaches of AgNPs in monoliths were explored. The AgNPs were either photogenerated in situ during polymerization of the monolith by UV irradiation, or incorporated to the polymerization mixture (ex situ). The influence of the AgNP concentration on the morphological and chromatographic properties of the polymer matrix was investigated, and both the in situ and ex situ approaches were comparatively discussed. The morphology of the monoliths was characterized by electron microscopic techniques, and their electrochromatographic…
Two-Step Route to Indoles and Analogues from Haloarenes: A Variation on the Fischer Indole Synthesis
2012
In a new variation on the Fischer indole synthesis, readily available haloarenes are converted into a wide range of indoles in just two steps by halogen-magnesium exchange and quenching with di-tert-butyl azodicarboxylate, followed by reaction with aldehydes or ketones under acidic conditions. The protocol, which is readily extended to the preparation of indole isosteres, 4- and 6-azaindoles and thienopyrroles, obviates the need to prepare potentially toxic aryl hydrazines, simultaneously avoiding undesirable anilines such as naphthylamines.
Synthesis of Functionalized Indoles with a Trifluoromethy-Substituted Stereogenic Tertiary Carbon Atom Through an Enantioselective Friedel-Crafts Alk…
2010
[EN] Chiral complexes of BINOL-based ligands with zirconium tert-butoxide catalyze the Friedel-Crafts alkylation reaction of indoles with beta-trifluoromethyl-alpha,beta-unsaturated ketones to give functionalized indoles with an asymmetric tertiary carbon center attached to a trifluoromethyl group. The reaction can be applied to a large number of substituted alpha-trifluoromethyl enones and substituted indoles. The expected products were obtained with good yields and ees of up to 99%.
Induced seismicity response of hydraulic fracturing: results of a multidisciplinary monitoring at the Wysin site, Poland
2018
Abstract Shale oil and gas exploitation by hydraulic fracturing experienced a strong development worldwide over the last years, accompanied by a substantial increase of related induced seismicity, either consequence of fracturing or wastewater injection. In Europe, unconventional hydrocarbon resources remain underdeveloped and their exploitation controversial. In UK, fracturing operations were stopped after the Mw 2.3 Blackpool induced earthquake; in Poland, operations were halted in 2017 due to adverse oil market conditions. One of the last operated well at Wysin, Poland, was monitored independently in the framework of the EU project SHEER, through a multidisciplinary system including seis…
La santidad de nuestro muy santo Padre Inocencio ... Papa XII ... se ha servido ... cōceder este santo Iubileo, al gran Santuario y Hospital del Div…
1696
Sobre els grav. es llig: Innocentius XII. ad perpetuam rei memoriam Esc. papal i reial i grav. xil. en la part superior del f. F. amb orla tip. Tex a 1 i a 2 col.
El ciclo de la vida de San Ignacio de Loyola pintado por Cristóbal de Villalpando en Tepozotlán. Precisiones iconográficas
1994
LOS PINTORES QUE EN SUS OBRAS REPRESENTARON LA VIDA Y MILAGROS DE SAN IGNACIO DE LOYOLA, PUDIERON INSPIRARSE EN LAS NUMEROSAS ESTAMPAS DE GRABADOS QUE ACOMPAÑARON LA CAMPAÑA DE PROPAGANDA QUE TUVO LUGAR A RAIZ DE SU BEATIFICACION Y POSTERIOR CANONIZACION. ENTRE ELLAS, LA SERIE MAS NUMEROSA Y COMPLETA FUE LA GRABADA POR JEAN BAPTISTA BARBE SEGUN DIBUJOS DE RUBENS, PUBLICADA EN ROMA EN 1609. EN MUCHAS DE ESTAS ESTAMPAS SE BASO CRISTOBAL DE VILLALPANDO PARA REALIZAR LA SERIE SOBRE LA VIDA DEL SANTO EN EL NOVICIADO DE TEPOZOTLAN, MEXICO. LAS PINTURAS, FECHADAS EN 1710, CORRESPONDEN AL ULTIMO PERIODO, EN EL QUE RECURRIO A COLABORADORES, LO QUE EXPLICA LAS DESIGUALDADES DE CALIDAD (ABC/LAG).