Low temperature oxidation of ammonia to N₂O over mixed oxide catalysts

The study is devoted to development of technology of catalytic ammonia oxidation to nitrogen(I) oxide. The process of low-temperature oxidation of ammonium on oxidizing catalysts has been investigated for production of nitrogen(I) oxide to be used for medical purposes and organic synthesis. Mixed oxide catalysts under various technological parameters were investigated. Experimentally validated concepts became the basis for creation the technological process of ammonia oxidation. Technological scheme of nitrogen(I) oxide production for organic synthesis was developed. The developed technological process is pro-posed for industrial implementation and appropriate output data are provided for industrial design

Structure of extreme precipitation field in Western Siberia

The present paper introduces the results of analyzing the space-time structure of extreme characteristics of precipitation in Western Siberia. For each index, with the view of changes evaluation, differences between average values for periods 1951-1980 and 1981-2010 were calculated. The assessment of synchronicity in time and space with the use of factor and cluster analysis showed that changes in precipitation of Western Siberia are determined by global climate-forcing processes only by one-third. When taking into account the results of division into classes, the share of the explained variance increases to 40-60%. The performed classification confirmed an increase in synchronicity when decreasing the territory scale. © (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only

Distinct Patterns of Expression and Evolution of Intronless and Intron-Containing Mammalian Genes

Comparison of expression levels and breadth and evolutionary rates of intronless and intron-containing mammalian genes shows that intronless genes are expressed at lower levels, tend to be tissue specific, and evolve significantly faster than spliced genes. By contrast, monomorphic spliced genes that are not subject to detectable alternative splicing and polymorphic alternatively spliced genes show similar statistically indistinguishable patterns of expression and evolution. Alternative splicing is most common in ancient genes, whereas intronless genes appear to have relatively recent origins. These results imply tight coupling between different stages of gene expression, in particular, transcription, splicing, and nucleocytosolic transport of transcripts, and suggest that formation of intronless genes is an important route of evolution of novel tissue-specific functions in animals