13 research outputs found
Xenobiotics: a Threat to the Health of Living Organisms
The article summarizes and analyzes the main impacts of various xenobiotics or their groups on the human body and the consequences of such exposure. The study suggests the refinements to the generally accepted classification of xenobiotics’ origins. The paper also describes the molecular mechanism of foreign substances biotransformation in a human body. The metabolism of xenobiotics differs due to their forms and types’ varieties. The factors of influence on chemicals’ metabolism are also of great importance. Individual features of the metabolism may be associated with genetic differences in the activity of metabolic enzymes. The research results further the comprehension of the exposure pathways and health impacts of the xenobiotics and their metabolites
Mesoscopic Ordering Effects in Single-Crystalline Thin Films of Lanthanum Manganites
We have investigated thin films of lanthanum manganites epitaxially grown by pulsed laser deposition on single-crystalline substrates. X-ray diffraction studies show that the characteristic feature of the investigated films is a superposition of fractions with long range atomic order in the basic single-crystalline matrix, and mesoscopic order in the clusterized structure encompassing the Mn-O layers. A detailed analysis of diffusive scattering shows that the size of metallic clusters and their volume concentration in the dielectric matrix varies. In the case of a small size and concentration, the metallic clusters in low temperature behave as quantum dots and their presence leads to a tunneling mechanism of conductivity with characteristic R(T)= const. In the case of large cluster size, the discrete energy levels become smeared. It appears also that the optical, transport, and magnetic properties of the investigated films depend critically on the distribution of Mn, Mn, and Mn ions in the clusters
Characteristics of the clustered structure of Pb(Li, La)(Zr1−y Tiy)O3 in the antiferroelectric-ferroelectric transition region
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Lake status records from the former Soviet Union and Mongolia: data base documentation
Effect of the self-organized cluster structure in LaSrMnO films on the slope of the temperature dependence of resistivity
Phase transitions in the CNx-TiN system attendant on the variation of the bias voltage during ion-stimulated growth
Phase transitions in the CNx-Co system induced by changes in the film growth temperature
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