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A method for quantitative determination of myricitrin in common myrtle (Myrtus communis L.) leaves using high-performance liquid chromatograph (HPLC) was developed. The content of the dominant flavonoid myricitrin (myricetin 3-O-α-L-rhamnopyranoside) in common myrtle leaves varied from 0.98 ± 0.02% to 1.51 ± 0.07%. The error of a single determination and the average error of the myricitrin content determination in common myrtle leaves were ±15.81% and ±4.77%, respectively, with confidence probability 95%. [ABSTRACT FROM AUTHOR]

Sodium cholate is a bile acid salt, which is applied as a biological detergent. The mixed systems of phospholipid/sodium cholate are used to study the self-assembly of micelles and formation of micellar systems. The micelles consisting of a phospholipid/sodium cholate mixture are used for drug delivery through the skin. An important part of the investigations in this field is examination of the structure and properties of micelles consisting of sodium cholate molecules. The structure of sodium cholate micelles have been investigated by small-angle neutron scattering. The average radius of sodium cholate micelles in the sodium cholate concentration range of 25‒100 mM is found to be 10.14 ± 0.01 Å. [ABSTRACT FROM AUTHOR]

The article presents a research study which focuses on the cyclonic variances in winter and spring seasons within the regions of the Black and Mediterranean Seas. It mentions the detection of cyclones on these regions through NCEP/NCAR data reanalysis and North Atlantic Oscillation (NAO). Furthermore, the interannual cyclonic activities are also cited.

Considering the side effects of existing drugs used for pain relief, the search for new analgesics with high efficacy and safety remains relevant. Aseries of imidazopyrrolo[3,4-b]quinoline-5,11-diones and pyrimidopyrrolo[3,4-b]quinoline-6,12-diones II were synthesized, whose analgesic activity at a dose of 0.05 mmol/kg was studied in the hotplate test in rats after i.p. administration. One compound was found with analgesic activity comparable to that of reference compound diclofenac sodium. Compounds II were less toxic than diclofenac sodium. [ABSTRACT FROM AUTHOR]

The design of robust and inexpensive molecular photocatalysts for the conversion of abundant stable molecules like H2O and CO2 into an energetic carrier is one of the major fundamental questions for scientists nowadays. The outstanding challenge is to couple single photoinduced charge separation events with the sequential accumulation of redox equivalents at the catalytic unit for performing multielectronic catalytic reactions. Herein, double excitation by nanosecond pump–pump–probe experiments was used to interrogate the photoinduced charge transfer and charge accumulation on a molecular dyad composed of a porphyrin chromophore and a ruthenium-based catalyst in the presence of a reversible electron acceptor. An accumulative charge transfer state is unattainable because of rapid reverse electron transfer to the photosensitizer upon the second excitation and the low driving force of the forward photodriven electron transfer reaction. Such a method allows the fundamental understanding of the relaxation mechanism after two sequential photon absorptions, deciphering the undesired electron transfer reactions that limit the charge accumulation efficiency. This study is a step toward the improvement of synthetic strategies of molecular photocatalysts for light-induced charge accumulation and more generally, for solar energy conversion. [ABSTRACT FROM AUTHOR]

Antioxidant properties of arylhydrazones in sunflower oil oxidation and regular trends in variation of the antioxidant activity of arylhydrazones in the process in comparison with ethybenzene oxidation were examined. [ABSTRACT FROM AUTHOR]