Results 61 to 70 of about 137,428 (211)

Thermodynamic Insights into the Separation of Carotenoids in Reversed-Phase Liquid Chromatography

International Journal of Analytical Chemistry, 2019
The retention mechanism of four major carotenoids, two xanthophylls (i.e., lutein and zeaxanthin) and two carotenes (i.e., lycopene and β-carotene), was investigated in reversed-phase liquid chromatography with the aim of thermodynamic analysis.
Nicola Marchetti, Pier Paolo Giovannini, Martina Catani, Luisa Pasti, Alberto Cavazzini   +4 more
doaj   +1 more source

Determination of Carbofuran on Hydrophilic Interaction Liquid Chromatography using TSKgel®Amide-80 as a Stationary Phase

Makara Journal of Science, 2016
Hydrophilic interaction liquid chromatography (HILIC) equipped with an environmentally friendly capillary column was employed to investigate the retention behavior of carbofuran; a polar stationary phase was used as well.
Asep Kurnia, Lee Wah Lim, Toyohide Takeuchi   +2 more
doaj   +1 more source

Inequalities for the ruin probability in a controlled discrete-time risk process [PDF]

, 2009
Ruin probabilities in a controlled discrete-time risk process with a Markov chain interest are studied. To reduce the risk there is a possibility to reinsure a part or the whole reserve. Recursive and integral equations for ruin probabilities are given.
Diasparra, Maikol, Romera, Rosario
core   +1 more source

Reversed-phase thin-layer chromatography behavior of aldopentose derivatives [PDF]

, 2012
Quantitative structure-retention relationships (QSRR) have been used to study the chromatographic behavior of some aldopentose. The behavior of aldopentose derivatives was investigated by means of the reversed-phase thin-layer chromatography (RP TLC ...
Jevrić Lidija R., Livaja-Popović Dragana J., Lončar Eva S., Malbaša Radomir V.   +3 more
core   +1 more source

Hydrophilic interaction electrochromatography applied in packed capillaries [PDF]

, 2013
C
De Smet, Seppe, Lynen, Frederic
core   +1 more source

Spatially and Temporally Resolved Analysis of Bleeding in a Centrifugal Partition Chromatography Rotor

Separations
Centrifugal Partition Chromatography (CPC) is a separation technique that utilizes immiscible liquid phases to purify compounds. The selection of solvents in Liquid–Liquid Chromatography offers flexibility and optimization possibilities for specific ...
Felix Buthmann, Philip Laby, Djamal Hamza, Jörg Koop, Gerhard Schembecker   +4 more
doaj   +1 more source

Molecular study of lipids in humic acids by sequential chemical degradation [PDF]

, 2009
Lipidy v půdě vykazují poměrně vysokou resistenci k biodegradaci, mohou proto tak zajistit informace o zdrojích organické hmoty a diagenetických procesech. Půdní organická hmota je vysoce heterogenní a vyskytují se v ní různé dynamické systémy.
Bachratá, Radka
core  

Retention Mechanisms of Basic Compounds in Liquid Chromatography with Sodium Dodecyl Sulfate and 1-Hexyl-3-Methylimidazolium Chloride as Mobile Phase Reagents in Two C18 Columns

Separations
Reversed-phase liquid chromatography (RPLC) relies on a non-polar stationary phase and a more polar hydro-organic mobile phase, where compound retention is primarily governed by hydrophobicity, with more hydrophobic compounds being retained longer.
Carlos Josué Tereba-Mamani, Maria Celia Garcia-Alvarez-Coque, María José Ruiz-Ángel   +2 more
doaj   +1 more source

Type Ia Supernovae: An Examination of Potential Progenitors and the Redshift Distribution [PDF]

, 1997
We examine the possibility that supernovae type Ia (SN Ia) are produced by white dwarfs accreting from Roche-lobe filling evolved companions, under the assumption that a strong optically thick stellar wind from accretor is able to stabilize the mass ...
Canal R., Cappellaro E., de Kool M., Eggleton P. P., Kahabka P., L. Yungelson, Li X.-D., M. Livio, Madau P., Mochkovich R., Paczynski B., Pastetter L., Refsdal S., Refsdal S., Shaefer B. E., Soberman G. E., Uus U., van den Heuvel E. P. J., Yungelson L.   +18 more
core   +3 more sources

Estimation of Solute-Stationary Phase and Solute-Mobile Phase Interactions in the Presence of Ionic Liquids

Separations, 2019
The presence of free silanols on alkyl-bonded reversed-phase stationary phases is responsible for broad and asymmetrical peaks when basic drugs are chromatographed with conventional octadecylsilane (C18) columns due to ionic interactions. In the last few
María José Ruiz-Ángel
doaj   +1 more source