Search results for "Indicators"
showing 10 items of 539 documents
Comparison of several methods used for the determination of cephalosporins. Analysis of cephalexin in pharmaceutical samples
2002
The precision of UV absorbance of intact and acid degraded cephalosporins, ninhydrin, high performance liquid chromatography and iodometric methods used for analysis of cefoxitin, cefotaxime, cephazolin and cephalexin were compared. To obtain the calibration graphs the analytical signal used were: absorbance, first derivative absorbance, second derivative absorbance and H-point Standard Additions Method by using absorbance values at two selected wavelengths as analytical signal. These methods and calibration graphs were also used for the determination of cephalexin in pharmaceutical samples.
Furosemide assay in pharmaceuticals by Micellar liquid chromatography: study of the stability of the drug.
2000
A simplified high-performance liquid chromatographic procedure is described for the determination of furosemide (4-chloro-N-furfuryl-5-sulphamoylanthranillic acid), which makes use of UV detection, a C18, reversed-phase column, and micellar mobile phases of sodium dodecyl sulphate (SDS) and 1-propanol at pH 3 buffered with phosphate system. The most adequate experimental conditions to handle furosemide solutions in the analytical laboratory are studied. The mixture of furosemide and its degradation products which are formed upon light exposition was resolved with a mobile phase of 0.04 M SDS-2% propanol. Separation of furosemide from its common impurities and the hydrolytic product, 4-chlor…
Una inaspettata biodiversità valutata con la trappola malaise: il caso dei collemboli di Lampedusa
2013
All‟interno di uno studio sulla biodiversità dell‟entomofauna dell‟Isola di Lampedusa, che verteva principalmente sulla fauna aerea, si sono trovati diversi taxa normalmente appartenenti alla fauna edafica. Infatti per il monitoraggio sono state utilizzate trappole di tipo Malaise internazionalmente impiegate e consigliate nei protocolli per il monitoraggio di popolazioni di insetti volatori. Inaspettatamente, anche se qualche altro caso è citato in letteratura, si sono rinvenuti diversi taxa più tipicamente rappresentativi della fauna del suolo ed in particolare dell‟epifauna quali chilopodi, collemboli, coleotteri carabidi. La nostra attenzione si è focalizzata sui collemboli in quanto so…
Estudio de la relación entre miembros del comité editorial de las revistas científicas de Psicología y su producción según diferentes indicadores bib…
2017
[ES]: El objetivo del presente trabajo es estudiar la relación entre los miembros del comité editorial que publican artículos en revistas de las que forman parte y la propia revista. Los resultados apuntan que los miembros del comité editorial publican sus artículos de forma más rápida frente a los autores que no forman parte del comité, y que no existe colaboración entre los miembros con mayor presencia en diferentes comités, sí habiéndola entre miembros de una misma revista. En 6 de las 10 revistas estudiadas el porcentaje de artículos firmados por algún miembro del comité supera el 25%, y en tres de estas revistas el tiempo de publicación de estos artículos es significativamente inferior…
Monitoring multidimensional phenomena with a multicriteria composite performance interval approach
2021
[EN] In the last two decades, the construction of composite indicators to measure and compare multidimensional phenomena in a broad spectrum of domains has increased considerably. Different methodological approaches are used to summarise huge datasets of information in a single figure. This paper proposes a new approach that consists in computing a multicriteria composite performance interval based on different aggregation rules. The suggested approach provides an additional layer of information as the performance interval displays a lower bound from a non-compensability perspective, and an upper bound allowing for full-compensability. The outstanding features of this proposal are: 1) a dis…
Analysis of shots in relation to the outcome in elite women's water polo matches. [Análisis de los lanzamientos en función del resultado en partidos …
2018
Abstract The aim of the current study was to investigate the shot performance of elite female water polo players according to their match outcome during three international tournaments, the 2012 Olympic Games, 2013 and 2014 FINA World Leagues. Twenty-four official matches footage [2012 Summer Olympic Games, n=8; 2013 FINA World League, n=8 and 2014 FINA World League, n=8] were obtained and analysed. The results showed that a similar playing style was used in both the 2012 and 2013 tournaments, independently of the outcome while in the 2014 FINA World League, winning teams performed more shots after displacement, more shots ending to zone 4 and scored more goals than losing ones (and fewer s…
Polydimethylsiloxane composites containing 1,2-naphtoquinone 4-sulphonate as unique dispositive for estimation of casein in effluents from dairy indu…
2015
A unique dispositive to determine casein which is the most abundant protein in dairy sewages has been proposed. In this sensing technology, the derivatization reagent 1,2-naphtoquininone 4-sulphonate (NQS) is embedded into a polydimethylsiloxane-tetraethylortosilicate-SiO2 nanoparticles composite (PDMS-TEOS-SiO2NPs). When the composite is immersed into the samples, casein is extracted from the solution and derivatized inside the PDMS matrix after 10 min at 100°C. The sensing support changes its color from yellow to orange depending on the casein concentration. Quantitative analysis can be carried out by measuring the absorbance with a reflection probe or by image-processing tool (GIMP). Thi…
Modelling the labour market of minority ethnic groups
2012
Abstract This paper investigates the effects, in terms of labour and macroeconomic indicators, of closing the gap between the ethnic minority employment rate and the overall population rate using a computable general equilibrium modelling framework. The labour market has been integrated by indicators related to ethnicity, employment status and occupational class. The policy test has been designed for the UK. According to the results, the policy actions aimed to remove the barriers that contribute to the unemployment of the minority ethnic groups improve not only the employment and occupational status of these groups, but the effects are also positive in terms of aggregate employment, GDP, t…
Discovering the Factors Influencing Students' Perception of the Educational Environment in the Context of Foreign Language Training in a Technical Hi…
2010
An Environmental Analysis of the Effect of Energy Saving, Production and Recovery Measures on Water Supply Systems under Scarcity Conditions
2015
Water is one of the primary resources provided for maintaining quality of life and social status in urban areas. As potable water is considered to be a primary need, water service has usually been managed without examining the economic and environmental sustainability of supply processes. Currently, due to increases in energy costs and the growth of environment preservation policies, reducing water leakage, energy consumption and greenhouse gas (GHG) production have become primary objectives in reducing the environmental footprint of water service. The present paper suggests the implementation of some performance indicators that show the interdependence of water loss, energy consumption and…