Mn-Doped BaTiOCeramics: Thermal and Electrical Properties for Multicaloric Applications.

Multiferroic materialsare widely used in microelectronics because they are sensitive to elastic, magnetic, and electric fields and there is an intrinsic coupling between them. In particular, transition metal-doped BaTiO is consideredas a viable multiferroic because of the simultaneous presence of ferroelectricity and magnetism.In this work, we study the electrical and thermal properties of Mn-doped BaTiO ceramics that can be used for multicaloric applications.

Glycosides from edible sea cucumbers stimulate macrophages via purinergic receptors.

Since ancient times, edible sea cucumbers have been considered a jewel of the seabed and used in Asian folk medicine for stimulation of resistance against different diseases. However, the power of this sea food has not been established on a molecular level. A particular group of triterpene glycosides was found to be characteristic metabolites of the animals, responsible for this biological action.

Urupocidin A: a new, inducing iNOS expression bicyclic guanidine alkaloid from the marine sponge Monanchora pulchra.

Urupocidins A and B (1 and 2), bisguanidine alkaloids with an unprecedented skeleton system, derived from polyketide precursors and containing an unusual N-alkyl-N-hydroxyguanidine moiety, have been isolated from the sponge Monanhora pulchra. The structures of 1 and 2, including absolute configuration, were established using the detailed analysis of 1D and 2D NMR, CD, and mass spectra as well as chemical transformations. Compound 1 increases nitric oxide production in murine macrophages via inducing iNOS expression.

[Epiphytic communities of arboreal formations in Southern Vietnam: an analysis of species composition and synusias structure in dependence on the extent of anthropogenic impact].

Species composition of epiphytic communities within different formations of Phú Quôc Island (Southern Vietnam) is studied. The dependence of species composition and structural complexity of epiphytic communities on formation quality is demonstrated. Representatives of different families differ notably in their sensitivity to disturbances.

[Rapid experimental rationale for a waste hazard class by cytotoxicity].

The paper presents the results of experimental and analytical studies substantiating a classification of waste hazard by the cytotoxicity indices. The authors have established a significant correlation between the substance toxicity values obtained in vivo and in vitro and show it possible to make an approximate forecast of the average lethal concentration of substances by the estimates made on cell cultures. The criteria for toxicological waste hazard, which are adequate to those for the hazards of chemicals by DL50, are given.