Ag-EDTA-Zr and Au-EDTA-Zr Nanocomposites for the Quantitative Determination of Some Organophosphate Pesticides in Water and Tomatoes.

Background: Organophosphate pesticides (OP) pose risks to health and the environment, and monitoring them is an urgent task.

Objective: Development of a method for their determination in water and food.

Method: A simple photometric method for the determination of some OPs was demonstrated.

Gasparyan Method of Total Autologous Reconstruction of the Aortic Valve.

In this case report, I describe a new technique for total reconstruction of the aortic valve with autologous pericardium. The parameters of the cusps were calculated using very simple formulas after measurement of the aortic root intercommissural distances. Glutaraldehyde-treated pericardium was trimmed along the marked line, leaving 2 mm of tissue along the fibrous annulus attachment margin for the suture and small wings on both commissural margins to secure the commissural coaptation between right and noncoronary cusps.

Detection of Saccharomyces cerevisiae by silver nanoparticles sensitized with various lectins.

Anisotropic silver nanoparticles sensitized by various lectins were applied for detection of yeast (Saccharomyces cerevisiae) which was used as a model of fungal cells. It was shown that high concentrations of yeast cells have stabilized silver nanoparticles, preventing their aggregation in the presence of NaCl whereas at low concentrations of cells, the salt has induced aggregation of nanoparticles with drastic changes in optical spectra. These changes depend on cell concentration and permit the detection of cells in the range from 3.

Antibodies to oxidized lipoproteins in human normal plasma, detection and analysis.

In the article, presence of antibodies to protein components of oxidized human donor plasma was demonstrated. It was shown that normal plasma oxidized by CuCl, FeSO, or potassium ferricyanide acquired ability to bind with human IgG-sensitized polystyrene latex particles and colloidal gold nanoparticles. Ability of these antibodies to bind to oxidized components strongly depends on time of oxidation.