Spectral and brightness characteristics of the main forest-forming species on images of the scanner Leica ADS100

Until 2014 the aerial photography was carried out using analogue Leica RC30 camera. In 2014 was purchased a digital scanner Leica ADS100, which provides images of very high spatial resolution in four bands: blue, green, red and near-infrared. In connection with the transition to the new equipment it is necessary to study the variability of spectral lumi nance characteristics of the main tree species and on the resulting images. The variability of change of spectral luminance characteristics of a shaded and illuminated parts of crowns of major tree species in images of very high resolution are investigated. Regularities of the change of the average value of th e spectral brightness of the tree species depending on age class are described. The analysis of separability of the classes crowns is given, the classification of images of controlled and uncontrolled methods and subsequent evaluation of their accuracy was performed

Use of the two-level contact and distributive devices in reactors of trial installation productions of methyl air of fat acids

Justified by the value of dispersion and uniform distribution of flow in the apparatus for a liquidliquid interactions. Showing the relevance of phase dispersion and distribution of flows in the column reactor plants for fatty acid methyl esters. The design and principle of operation of the contact and switchgear for the esterification reactor, neutralization and washing of the plant. Based on the experience of the plant confirmed efficiency and effectiveness of the device, as well as recommendations for its wider use

Robust Polymer Matrix Based on Isobutylene (Co)polymers for Efficient Encapsulation of Colloidal Semiconductor Nanocrystals

We introduce new oxygen- and moisture-proof polymer matrixes based on polyisobutylene (PIB) and its block copolymer with styrene [poly(styrene-block-isobutylene-blockstyrene), PSt-b-PIB-b-PSt] for the encapsulation of colloidal semiconductor nanocrystals. In order to prepare transparent and processable composites, we developed a special procedure of nanocrystal surface engineering including ligand exchange of parental organic ligands to inorganic species followed by the attachment of specially designed short-chain PIB functionalized with an amino group. The latter provides excellent compatibility of the particles with the polymer matrixes. As colloidal nanocrystals, we chose CdSe nanoplatelets (NPLs) because they possess a large surface and thus are very sensitive to the environment, in particular in terms of their limited photostability. The encapsulation strategy is quite general and can be applied to a wide variety of semiconductor nanocrystals, as demonstrated on the example of PbS quantum dots. All obtained composites exhibited excellent photostability, being tested in a focus of a powerful white-light source, as well as exceptional chemical stability in a strongly acidic media. We compared these properties of the new composites with those of widely used polyacrylate-based materials, demonstrating the superiority of the former. The developed composites are of particular interest for application in optoelectronic devices, such as color-conversion light-emitting diodes, laser diodes, luminescent solar concentrators, etc

Chloride and Indium-Chloride-Complex Inorganic Ligands for Efficient Stabilization of Nanocrystals in Solution and Doping of Nanocrystal Solids

Here, the surface functionalization of CdSe and CdSe/CdS core/shell nanocrystals (NCs) with compact chloride and indium-chloride-complex ligands is reported. The ligands provide not only short interparticle distances but additionally control doping and passivation of surface trap states, leading to enhanced electronic coupling in NC-based arrays. The solids based on these NCs show an excellent electronic transport behavior after heat treatment at the relatively low temperature of 190 degrees C. Indeed, the indium-chlorido-capped 4.5 nm CdSe NC based thin-film field-effect transistor reaches a saturation mobility of = 4.1 cm(2) (V s)(-1) accompanied by a low hysteresis, while retaining the typical features of strongly quantum confined semiconductor NCs. The capping with chloride ions preserves the high photoluminescence quantum yield (approximate to 66%) of CdSe/CdS core/shell NCs even when the CdS shell is relatively thin (six monolayers). The simplicity of the chemical incorporation of chlorine and indium species via solution ligand exchange, the efficient electronic passivation of the NC surface, as well as their high stability as dispersions make these materials especially attractive for wide-area solution-processable fabrication of NC-based devices