Results 121 to 130 of about 65,071 (156)

Modelling of UPLC behaviour of acylcarnitines by quantitative structure–retention relationships

Journal of Pharmaceutical and Biomedical Analysis, 2014
In the present work, the retention time (RT) of acylcarnitines, collected by ultra-performance liquid-chromatography after formation of butyl esters, is modelled by quantitative structure-retention relationship (QSRR) method. The investigated set consists of free carnitine and 46 different acylcarnitines, including the isomers commonly monitored in ...
D'ARCHIVIO, ANGELO ANTONIO, MAGGI M. A, RUGGIERI, FABRIZIO   +2 more
openaire   +2 more sources

Carboxylic acids: prediction of retention data from chromatographic and electrophoretic behaviours

Journal of Chromatography B: Biomedical Sciences and Applications, 1998
A review of the main results reached in the prediction of retention data of carboxylic acids, inferred by their chromatographic and electrophoretic behaviour, is presented. Attention has been focused on the main separation methods used in carboxylic acids analysis, that is ion-exclusion, anion-exchange, reversed-phase (RP) liquid chromatography and ...
BRUZZONITI, Maria Concetta, MENTASTI, Edoardo, SARZANINI, Corrado   +2 more
openaire   +3 more sources

Retention behaviour of carbohydrate oligomers in reversed-phase chromatography

Journal of Chromatography A, 1984
The retetnio behaviour of starch and cellulose hydrolysates on alkyl-modified silica columns using aqueous eluents has been studied. The influence of eluent pH, addition of sodium chloride or alcohols to the eluent, pore diameter of the silica support and chain length of the alkyl modification were investigated.
Kuster, B.F.M., Verhaar, L.A.T., Claessens, H.A.   +2 more
openaire   +2 more sources

Hysteretic water-retention behaviour of unsaturated hydrophobised soils

Géotechnique
Hydrophobised soils found in the superficial region of earthen infrastructure can affect the hydrological processes of these structures. The hysteretic water-retention curve (WRC), which governs these processes, for hydrophobised soils has rarely been reported.
Zheng Zhou, Ali Akbar Karimzadeh, Anthony Kwan Leung, Sum Yin Fok   +3 more
openaire   +2 more sources

Retention behaviour of51CrO4 2? species on ignited microcrystalline iodates

Mikrochimica Acta, 1977
Influence of pH and that of added lattice and certain non-lattice ions has been studied towards instantaneous sorption of tracer51CrO4 2− ionic species on iodates of lead, barium and strontium. Carrying is postulated to take place by surface adsorption.
M. M. Bhutani, null Santosh, Ritu Goswami   +2 more
openaire   +1 more source

Customer retention: a behavioural model

IMA Journal of Management Mathematics, 1995
R. HAMILTON, J. B. HOWCROFT, J. SAUNDERS
openaire   +1 more source

Long-term retention of behavioural habituation in the rat

Animal Behaviour, 1973
Abstract The orienting response in rats was measured by the interruption in licking that occurred during the presentation of a tone stimulus. Habituation occurred after a mean of 6·3 presentations and there was complete retention of habituation for 72 hr, and 70 per cent retention after 288 hr.
openaire   +1 more source

On the fractal behaviour of water retention curves

2011
Water retention curve (WRC) is analyzed by means of the fractal geometry approach. Three models accounting for the fractal distribution of either the pore and solid phase of unsaturated porous media have been considered. By using data collected during a field scale internal drainage, we determine the functional relationship between the WRC, and the ...
Veltri Massimo, Severino Gerardo, De Bartolo Samuele, Fallico Carmine, Santini Alessandro   +4 more
openaire   +3 more sources

Water Retention Behaviour Explored by X-Ray CT Analysis

2012
This study aims to experimentally characterise the link between partial water saturation and suction in a sand sample at the micro scale. The paper presents the first results of an experimental study in which high resolution (7.5μm/px) X-ray tomography has been performed on a small (10×10mm) cylindrical sample of Hostun HN31 sand at several different ...
Ismael Riedel, Edward Andò, Simon Salager, Pierre Bésuelle, Gioacchino Viggiani   +4 more
openaire   +1 more source

Finnish family forest owners' retention tree management behaviour

In Scandinavia a widely adopted biodiversity maintenance measure in managed forests is to leave retention trees to the clearcutting areas. A certain number of retention trees are left to the cutting area permanently as residual trees, which distinguishes them from shelterwood and seed trees.
Hänninen, Harri, Koskela, Terhi, Kurttila, Mikko   +2 more
openaire   +1 more source