International Symposium on Thin-Layer Chromatography

JPC – Journal of Planar Chromatography – Modern TLC -     

Chronology of Thin-Layer Chromatography Focusing on Instrumental Progress

JPC – Journal of Planar Chromatography – Modern TLC -     

Influence of Spiral Framework on Nonlinear Optical Materials

A series of spiral donor–π–acceptor frameworks (i.e. 2 – 2 , 3 – 3 , 4 – 4 , and 5 – 5 ) based on 4‐nitrophenyldiphenylamine with π‐conjugated linear acenes (naphthalenes, anthracenes, tetracenes, and pentacenes) serving as the electron donor and nitro (NO₂) groups serving as the electron acceptor were designed to investigate the relationships between the nonlinear optical (NLO) responses and the spirality in the frameworks. A parameter denoted as D was defined to describe the extent of the spiral framework. The D value reached its maximum if the number of NO₂ groups was equal to the number of fused benzene rings contained in the linear acene. A longer 4‐nitrophenyldiphenylamine chain led to a larger D value and, further, to a larger first hyperpolarizability. Different from traditional NLO materials with charge transfer occurring in the one‐dimensional direction, charge transfer in 2 – 2 , 3 – 3 , 4 – 4 , and 5 – 5 occur in three‐dimensional directions due to the attractive spiral frameworks, and this is of great importance in the design of NLO materials. The origin of such an enhancement in the NLO properties of these spiral frameworks was explained with the aid of molecular orbital analysis.     

New Reagent for Detection of Amino Acids on TLC Plates

JPC – Journal of Planar Chromatography – Modern TLC -     

Study of the Chromatographic Behavior of Selected Steroid Hormones on Aluminum Oxide Plates Based on Quantitative Structure—Retention Relationships

JPC – Journal of Planar Chromatography – Modern TLC - The chromatographic properties of eight steroids: trans-androsterone, methyltestosterone, testosterone, progesterone, cortisone,...     

Influence of the Regression Technique on the Extrapolated Retention Values of Single-Point Adsorption Compounds on Silica Gel

JPC – Journal of Planar Chromatography – Modern TLC - The retention (RM) values of nine one-point adsorption model compounds: diphenylamine, indol, 2-naphtol, 1-naphtol, 1-naphtylamine,...     

A Spray Reagent for Identification of Amino Acids on Thin-Layer Chromatography Plates

JPC – Journal of Planar Chromatography – Modern TLC -     

A New Reagent for Identification of Amino Acids on Thin-Layer Chromatography Plates

JPC – Journal of Planar Chromatography – Modern TLC -     

Two New Spray Reagents for Detection of Amino Acids on Thin-Layer Plates

JPC – Journal of Planar Chromatography – Modern TLC -     

The Effect of Chromatographic Conditions on the Separation of Selected Alkaloids on Silica Layers

JPC – Journal of Planar Chromatography – Modern TLC - Alkaloid standards have been chromatographed on silica layers with a variety of aqueous and nonaqueous mobile phases. The effect on...     

Thin-Layer Chromatography of Phenolic Acids on Aminopropylsilica

JPC – Journal of Planar Chromatography – Modern TLC - The possibility of using aminopropylsilica TLC plates for determination of phenolic acids has been investigated. Eighteen phenolic...     

Effect of Chromatographic Conditions on Separation and System Efficiency in HPTLC of Selected Quinoline Standards on Cyanopropyl Stationary Phases

JPC – Journal of Planar Chromatography – Modern TLC - The retention behavior of thirteen quinolines on cyanopropyl stationary phase was studied using different mobile phases prepared...     

Thin-Layer Chromatographic Analysis of Carbohydrates in Biomphalaria glabrata Snails Maintained on a High-Fat Diet

JPC – Journal of Planar Chromatography – Modern TLC -     

Professor Monika Waksmundzka-Hajnos — A Tribute on the Occasion of Her 65th Birthday

JPC – Journal of Planar Chromatography – Modern TLC -     

Product Inhibited Enzymatic Reactions on the Rotating Disk Electrodes

A model of cyclic staircase voltammetry of enzymatic reactions on the rotating disk electrode is developed and the inhibition by the product is investigated. The responses are mostly time – dependent current – potential curves with maxima in the forward but not in the backward branch. If the maxima appear in both branches, the inhibition is potential – dependent either directly or indirectly. The source of the second maximum is explained.     

Thin-Layer Chromatographic Method for Separation of Wheatgrass Pigments on Sucrose Impregnated Silica Gel Plates

JPC – Journal of Planar Chromatography – Modern TLC -     

Chromatographic Behavior of Dithiocarbamate Fungicides on Cellulose Plates

JPC – Journal of Planar Chromatography – Modern TLC - The chromatographic behavior of the dithiocarbamate fungicides mancozeb, NaDDC, propineb, ziram, and zineb has been studied on TLC...     

Effect of Multiple Development Techniques on the Chromatographic Parameters and Separation Selectivity of Some Alkaloids on C18 and CN-Silica Layers

JPC – Journal of Planar Chromatography – Modern TLC - The retention behavior of selected alkaloids on C18 and CN stationary phases in different eluent systems — mixtures of...     

Quantitative TLC of Toxic Elements on Inorganic Ion-exchangers. VI. Separation and Determination of Cadmium

JPC – Journal of Planar Chromatography – Modern TLC -     

Direct Resolution of Aromatic Alcohols by Planar Chromatography on Tribenzoylcellulose as Chiral Stationary Phase

JPC – Journal of Planar Chromatography – Modern TLC -