Application of Laser-Induced Breakdown Spectroscopy in the Quantitative Analysis of Elements-K, Na, Ca, and Mg in Liquid Solutions.

Results of laser-induced breakdown spectroscopy measurements of K, Na, Ca, and Mg content in liquid media are discussed in the paper. Calibration results show correct parameters-linearity and R coefficients of determination at the levels of 0.94-0.

Al and Si quantitative analysis in aqueous solutions by LIBS method.

In the paper results of Laser-Induced Breakdown Spectroscopy (LIBS) measurements of Al and Si content in aqueous solutions are presented. Calibration curves exhibit good linearity and satisfying R coefficients of determination (over 0.99).

Assessment of the nutritional value of various teas infusions in terms of the macro- and trace elements content.

Background: Herbal teas are a good alternative to traditional green, black, red and white teas. Herbal teas infusions are also consumed for therapeutic purposes. Teas are the source of many valuable, biologically active compounds, including elements.

Studies on relationships between essential and toxic elements in selected body fluids, cells and tissues.

Processes occurring in the cellular and extracellular environment with the participation of elements both essential due to their vital functions and harmful to organism are complex and depend on many factors. The type of element and its chemical form as well as chemical composition of environment in which they occur play the significant role in the processes. But quantitative relationships between elements are also important, since both the excess and deficiency perturb their homeostasis in the organism.

Pregnancy-Associated Plasma Protein A (PAPP-A) Concentration in Population of Healthy Young People: Interactions with Tobacco Smoke and Anti-oxidative Status.

Pregnancy-associated plasma protein A (PAPP-A) is a high-molecular zinc-binding metalloproteinase that was first detected in the serum of pregnant women. It can also be detected in men and non-pregnant women. Recently, a growing interest in determining the concentration of PAPP-A as a marker of oxidative stress and atherosclerotic processes has been observed.