Investigation of Polyphenolic Compounds in Different Varieties of Black Chokeberry .

The purpose of this work was to study the qualitative and quantitative composition of the main groups of biologically active substances in the fresh fruits of five different varieties of black chokeberry ( (Michx.) Elliot), carried out within the framework of the search for available and cost-effective raw materials for food product fortification. Samples of aronia chokeberry were grown at the Federal Scientific Center named after I.

[Development and validation of methodology of quantitative determination of sibutramine in dietary supplements by high performance liquid chromatography].

Sibutramine is a highly effective drug for the treatment of obesity. In this regard, unscrupulous manufacturers can add sibutramine as a biologically active synthetic substance prohibited for use in the composition of dietary supplements. Thus, the problem associated with the illegal circulation of such dietary supplements is especially actual, given the scale of the sale of these products.

[On the issue of the detection of pregabalin and lorazepam in the cases of their joint presence for the purpose of chemical toxicological studies].

Data on the detection of joint presence of pregabalin and lorazepam in the biological objects and material evidence. Aim of this study is to develop a method of the detection of pregabalin and lorazepam in urine. The proposed approach to sample preparation of a biological object and the detection of lorazepam and pregabalin allows the detection of toxicants in cases of their joint presence.

[The application of the screening techniques for the purpose of chemical toxicological and forensic chemical analysis].

The application of the screening techniques for the purpose of chemical toxicological and forensic chemical analysis has the objective to detect and identify the life-threatening substances within the shortest possible time period for distinguishing them from a large number of other chemical compounds amenable to the toxicological evaluation. Such methods acquire special importance for forensic chemical expertise in the cases of a negative result of the primary examination. The present article provides information about the history of development of the screening techniques.

[Role of ethylene in the control of gametophyte-sporophyte interactions in the course of the progamic phase of fertilization].

We investigated dynamics of the content of 1-aminocyclopropane-l-carboxylic acid (ACC) and ethylene production in male gametophyte development and germination in fertile (self-compatible and self-incompatible) and sterile clones of petunia. Fertile male gametophyte development was accompanied by two peaks of ethylene production by anther tissues. The first peak occurred during the microspore development simultaneously with the degeneration of both the tapetal tissues and the middle layers of the anther wall.