Search results for "EFA"

Doña Josefa Ramírez : nueva relación en que se da cuenta de los extraordinarios arrojos que ha ejecutado esta noble señora con lo demás que verá el c…

Títol pres del començament del text Precedeix al títol: (Núm. 2) Dades del peu d'imprempta preses del colofó Data deduïda de les dates d'activitat de l'impressor Text a 2 columnes a 46 línines Gravat xilogràfic al principi del text

DFT and experimental studies on structure and spectroscopic parameters of 3,6-diiodo-9-ethyl-9H-carbazole

2015

The first report on crystal and molecular structure of 3,6-diiodo-9-ethyl-9H-carbazole is presented. Experimental room-temperature X-ray and 13C chemical shift studies were supported by advanced theoretical calculations using density functional theory (DFT). The 13C nuclear magnetic shieldings were predicted at the non-relativistic and relativistic level of theory using the zeroth-order regular approximation (ZORA). Theoretical relativistic calculations of chemical shifts of carbons C3 and C6, directly bonded to iodine atoms, produced a reasonable agreement with experiment (initial deviation from experiment of 44.3 dropped to 4.25 ppm). The changes in ring aromatic character via simple harm…

Molecular modeling and experimental studies on structure and NMR parameters of 9-benzyl-3,6-diiodo-9H-carbazole

2015

A combined experimental and theoretical study has been performed on 9-benzyl-3,6-diiodo-9H-carbazole. Experimental X-ray (100.0 K) and room-temperature 13C NMR studies were supported by advanced density functional theory (DFT) calculations. The non relativistic structure optimization was performed and the 13C nuclear magnetic shieldings were predicted at the relativistic level of theory using the Zeroth Order Regular Approximation (ZORA). The changes in the benzene and pyrrole rings compared to the unsubstituted carbazole or the parent molecules were discussed in terms of aromaticity changes using the harmonic oscillator model of aromaticity (HOMA) and the nucleus independent chemical shift…

Torrefaction technology for solid fuel production

2011

Bio-coal, torrefied lignocellulosic resources – Key properties for its use in co-firing with fossil coal – Their status

2012

Abstract Bio-coal has received generous amounts of media attention because it potentially allows greater biomass co-firing rates and net CO2 emission reductions in pulverised-coal power plants. However, little scientific research has been published on the feasibility of full-scale commercial production of bio-coal. Despite this, several companies and research organisations worldwide have been developing patented bio-coal technologies. Are the expectations of bio-coal realistic and are they based on accepted scientific data? This paper examines strictly peer-reviewed scientific publications in order to find an answer. The findings to date on three key properties of torrefied biomass are pres…

Renormalized solutions for degenerate elliptic–parabolic problems with nonlinear dynamical boundary conditions and L1-data

2008

Abstract We consider a degenerate elliptic–parabolic problem with nonlinear dynamical boundary conditions. Assuming L 1 -data, we prove existence and uniqueness in the framework of renormalized solutions. Particular instances of this problem appear in various phenomena with changes of phase like multiphase Stefan problems and in the weak formulation of the mathematical model of the so-called Hele–Shaw problem. Also, the problem with non-homogeneous Neumann boundary condition is included.

Status of Nordic research on simulation-based learning in healthcare: an integrative review

2018

This article is distributed under the terms of the Creative Commons Attribution 4.0 International License. Background. Based on common geography, sociopolitics, epidemiology, and healthcare services, the Nordic countries could benefit from increased collaboration and uniformity in the development of simulation-based learning (SBL). To date, only a limited overview exists on the Nordic research literature on SBL and its progress in healthcare education. Therefore, the aim of this study is to fill that gap and suggest directions for future research. Methods. An integrative review design was used. A search was conducted for relevant research published during the period spanning from 1966 to Ju…

Clinical Nurses Research Priorities in Hospital Settings: A Delphi Survey

2021

This study aimed to identify the research priorities of clinical nurses to develop a research program at a health care services system that includes three hospitals. A Delphi survey was emailed to all clinical nurses in two rounds. The Delphi method was used to collect data from the nurses in regards to their priority research themes, and the data were analyzed using descriptive and comparative statistics. A total of 933 clinical nurses returned the first round of the Delphi survey and 543 nurses answered the second round. Clinical nurses identified 89 potential research themes. Patient safety and ethical challenges were the two highest ranked research priorities. The 40 highest ranked pri…

Comparison of three solid-phase extraction processes in quantification of ciprofloxacin and enrofloxacin in pork meat

2012

Due to strong implications for food safety, control of fluoroquinolones residues in swine meat should be undertaken to verify compliance of the contamination levels with the maximum residue limits recently updated by Commission Regulation (EU) No. 37/2010 of 22 December 2009. Solid-phase extraction is widely used in antibiotic analysis in food of animal origin. In this study, the results of a comparative study using different types of solid-phase extraction columns, HLB, MCX, and MAX, for ciprofloxacin and enrofloxacin analysis, in pork meat, are presented. In addition, diverse sample treatments for defatting, precipitate proteins, eliminate cations, and increase the ionic strength, were us…

Roberto Pane e la ricostruzione postbellica. Un approfondimento su alcuni temi siciliani

2010

Nella relazione che Roberto Pane scrive per gli Atti del IV Congresso Nazionale di Storia dell’Architettura del 1950, con il termine «pseudo restauri», lo studioso si riferisce a quegli interventi gestiti dalle Curie che si improvvisano con propri uffici tecnici, promuovendo restauri in perenne contrasto con i pareri delle Soprintendenze. È in questo passaggio appassionato, della sua militante relazione al congresso, che Pane cita chiaramente il caso da lui conosciuto del Duomo di Cefalù con il suo chiostro. Inoltre è chiaro come Roberto Pane avesse avuto modo di conoscere direttamente il monumento, dato che nell’archivio fotografico che lo studioso dedicava alle lezioni universitarie, si t…