Spot applicator for thin-layer plates

Spot applicator for quantitative thin-layer and paper chromatography, suitable for clinical analysis.

fluoride tubes, the absolute insulin values would be incorrect. The fact that blood collected in an oxalatefluoride tube is more severely hemolyzed is emphasized by the data in Figure 1 and Table 2. In the comparison of insulin and hemoglobin levels in two different plasma tubes, it is obvious that samples collected in tubes containing EDTA are more suitable for accurate insulin analysis than w...

Unidimensional Thin Layer Chromatography of Salicylic Acid Derivatives on Boric Acid-Impregnated Plates in Drugs Studies

A unidimensional Thin Layer Chromatography system for the separation of salicylic acid and its derivatives (sulfosalicylic acid and Aspirin) has been developed. The separation was successfully using a solvent system of chloroform-methanol-water-ammonium hydroxide 120:75:6:2 (V/V) as mobile phase on TLC plates impregnated with boric acid. The method is based on different behavior of investigated...

Meshfree Particle Methods for Thin Plates

For thin plate problems, using the Kirchoff hypothesis, the three dimensional elasticity equations are reduced to a fourth order PDE for the vertical displacement. Conventional FEM has difficulties with this because the basis functions are required to have continuous partial derivatives. Meshfree methods have the advantage of constructing smooth approximation functions, but have difficulties in...

Large Time Existence for Thin Vibrating Plates

We construct strong solutions for a nonlinear wave equation for a thin vibrating plate described by nonlinear elastodynamics. For sufficiently small thickness we obtain existence of strong solutions for large times under appropriate scaling of the initial values such that the limit system as h → 0 is either the nonlinear von Kármán plate equation or the linear fourth order Germain-Lagrange equa...

unidimensional thin layer chromatography of salicylic acid derivatives on boric acid-impregnated plates in drugs studies