Influence of the inert and active ion bombardment on structure of the transition metal thin films

The results of the experimental research of the inert (He, Ne, Ar, Kr, Xe) and active (O, N) ion impact on the transition metal structure are presentedyesBelgorod State Universit

Investigation of twinning dynamics in VT1-0 titanium using acoustic emission

Use of acoustic emission signals makes it possible to analyze deformation processes in the bulk of a crystalline titanium structure formed under the effect of a concentrated strain created by loading of a diamond pyramidyesBelgorod State Universit

Twinning of alloy VT1-0 after total annealing

Twinning, that occurs in titanium VT1-0 crystals under the action of a concentrated stress, is studied by microindentation methods, recording of acoustic signals and probe microscopy. Some parameters and description of forms of a twinned interlayer in polycrystalline titanium VT1-0 are provided. The possibility of studying this process by recording acoustic emission signals is demonstratedyesBelgorod State Universit

On athermic mechanism of materials radiation embrittlement

To elucidate the mehanisms of radiation embrittlement of materials the temperature dependence of mechanical properties of irradiated materials has been studiedyesBelgorod State Universit

Effect of the Soil Dehydration Temperature on the Vapor-Phase Sorption of p-xylene

The effect of two methods for the preparation of soil samples for sorption experiments-hard (dehydration at 105°C) and mild (drying over P2O5 at 20°C in vacuum) drying-on the values of the vaporphase sorption of p-xylene was studied depending on the content of organic matter in the soil. It was shown with dark gray forest and chernozemic soils as examples that the hard drying of soil samples taken from the upper layer of the humus profile with a high content (>4%) of organic carbon decreased their sorption capacity in the range of 0-5% by 7-81%. Therefore, the method is unsuitable for these soils. It was also found that the mild method of soil preparation had obvious analytical advantages. © 2010 Pleiades Publishing, Ltd

КАЧЕСТВЕННЫЙ ЭЛЕМЕНТНЫЙ АНАЛИЗ ВЕЩЕСТВА С ИСПОЛЬЗОВАНИЕМ ФУНКЦИИ КРОСС-КОРРЕЛЯЦИИ

This paper reports on the effectiveness of a method of qualitative cross-correlation analysis for the automatic determination of the presence of elements in a sample using its atomic emission spectrum. The method is based on the calculation of the cross-correlation function of the recorded spectrum and the set of specially transformed element spectral lines from the Atom database for each element of Mendeleev’s periodic table. The presence of an element in the sample is determined from the correlation peak-to-noise ratio. The method is implemented in the Atom software and allows the determination of the elements present in a sample in less than a second.Keywords: cross-correlation function, qualitative analysis, atomic emission spectra, multi-element solid-state detectors.(Russian) DOI: http://dx.doi.org/10.15826/analitika.2013.17.1.005 S.V. Pankratov1, 2, V.A. Labusov1,2,3, and O.A. Neklyudov21Institute of Automation and Electrometry, Siberian Branch of Russian Academy of Sciences, Novosibirsk,  Russian Federation2VMK-Optoelektronika, Ltd., Novosibirsk, Russian Federation3Novosibirsk State Technical University, Novosibirsk, Russian FederationПоказана эффективность применения метода кросс-корреляционного качественного анализа для автоматического определения наличия элементов в пробе по её атомно-эмиссионному спектру. Метод основан на вычислении для каждого элемента Периодической таблицы функции кросс-корреляции зарегистрированного спектра и набора спектральных линий элемента из базы данных программы «Атом», предварительно преобразованных к специальному виду. Наличие элемента в пробе определяется по соотношению амплитуды корреляционного пика к шуму. Метод реализован в программе «Атом» и позволяет менее чем за секунду определить перечень элементов, присутствующих в пробе.Ключевые слова: функция кросс-корреляции, качественный анализ, атомно-эмиссионные спектры, многоэлементные твердотельные детекторы.DOI: http://dx.doi.org/10.15826/analitika.2013.17.1.00

Sorption of hydrocarbons by leached chernozem

The sorption of n-octane, n-nonane, n-decane, decalin, and p-xylene on oven-dried and differently wetted leached chemozem, zeolite-bearing rock, and limestone was studied using static headspace-gas chromatography. It was found that leached chernozem exhibits a high capacity for selective sorption of hydrocarbons and has significantly heterogeneous sorption sites. Thermodynamic parameters of sorption, specific surface of sorbents, and the fractal dimension of soil surface were determined. An increase in the soil moisture content significantly inhibited the sorption of the hydrocarbons studied. Copyright © 2003 by MAIK "Nauka/Interperiodica" (Russia)

Effect of organic matter on the sorption activity of heavy loamy soils for volatile organic compounds under low moisture conditions

© 2014, Pleiades Publishing, Ltd. The diverse effect of the organic matter content on the sorption of vapors of aromatic and aliphatic hydrocarbons in soils under low moisture (<10.5%) has been revealed in sorption experiments using profile samples from two virgin heavy loamy dark gray forest soils characterized by relatively stable contents of finely dispersed mineral components. The decrease of the hydrocarbon sorption with increasing the content of organic matter under dry conditions (in the moisture range from 0 to 5–6%) indicates its lower sorption activity than that of the clay components and the blocking of the sorption sites on soil minerals by organic matter. At moisture contents above 5–6%, the effect of the soil composition on the sorption activity changes radically: it increases with increasing the content of organic matter. This is due to the inversion of the ratio between the activities of the soil components because of the hydrophilization of the surface of the mineral soil component. As a result, the sorption of water on the minerals reduces the mineral sorption activity to hydrocarbons to a lower level than the activity of organic matter. The maximum manifestation of the revealed blocking effect has been observed for the low-humus soils and this effect decreased with the accumulation of soil organic matter

2,4,6-triaminopyrimidine and its associates with bis(hydroxymethyl) phosphinic acid. State in solution, protolytic, and complexing properties

Protolytic and complexing properties of 2,4,6-triaminopyrimidine and its associates with bis (hydroxymethyl)phosphinic acid in aqueous solution were studied using pH measurements, spectrophotometry (298 K), and mathematical simulation of equilibria (CPESSP software). The stability constants of the associates formed in solution were calculated. It was found that the said associates and the nitrogen base in their composition did not form innner-sphere complexes with typical complexing agents like doubly charged cations of d-elements and lanthanum(III). 2,4,6-Triaminopyrimidine forms an outer-sphere complex with copper(II) ions to affording tetrachlorocuprate(II) with diprotonated 2,4,6-triaminopyrimidine. © 2012 Pleiades Publishing, Ltd

2,4-diamino-6-(acetohydrazidomethylsulfinylmethyl)-1,3,5-triazine. State in solution, acid-base and complexing properties

Solutions of a new drug, 2,4-diamino-6- (acetylhydrazidomethylsulfonylmethyl)-1,3,5-triazine, exhibiting tuberculocidal activity were studied using the methods of pH-metry, spectrophotometry, mathematical simulation of equilibria (CPESSP software), and molecular mechanics. Protolytic properties of the compound in the medium of aqueous dimethylsulfoxide (40 vol % of DMSO) were characterized. The composition of the copper(II) complex of this compound was determined and its stability constants were calculated. Based on the absorption spectra in the UV and visible regions the complexing ability of 2,4-diamino-6-(acetylhydrazidomethylsulfonylmethyl)-1, 3,5-triazine toward nickel(II) and cobalt(II) were characterized in comparison with copper(II) under the same conditions. © 2013 Pleiades Publishing, Ltd