Method for basic measurement adjustment of commutator profiles

The possibility of error minimization as a result of noncontact measurement of the distance between eddy-current converter and commutator has been shown. The problem was solved by means of adjustment in transfer constant of the device measuring channel in the process of measuring distance to arbitrary taken commutator bar according to the method proposed

Calculation of Protolytic Equilibria Parameters on a Surface of Some Carbon Adsorbents According to Potentiometric Titration Data

Constants and Gibbs energy values of neutralization were calculated for protolytic equilibria on carbon adsorbents based on anthracite, charcoal and brown coal. A proposal regarding composition of surface functional groups of these sorbents was made

Sorption-Photometric Determination of Carbon Disulfide in the Workplace Air

Предложено использовать сорбционно-фотометрический метод для определения сероуглерода в воздухе рабочей зоны. Выбрана аналитическая система, образующая ярко окрашенный диэтанолдитиокарбаминат меди (II), и матрица (целлюлоза-фильтр), определены оптимальные условия анализа.The sorption-photometric method for determination of carbon disulfide in the workplace air has been proposed. The analytical system based on formation of colored diethanolcarbamate of copper (II) as well as matrix (cellulose filter) were chosen and the optimal analysis conditions were determined

Sorption-Photometric Determination of Carbon Disulfide in the Workplace Air

Предложено использовать сорбционно-фотометрический метод для определения сероуглерода в воздухе рабочей зоны. Выбрана аналитическая система, образующая ярко окрашенный диэтанолдитиокарбаминат меди (II), и матрица (целлюлоза-фильтр), определены оптимальные условия анализа.The sorption-photometric method for determination of carbon disulfide in the workplace air has been proposed. The analytical system based on formation of colored diethanolcarbamate of copper (II) as well as matrix (cellulose filter) were chosen and the optimal analysis conditions were determined

Sorption-Photometric Determination of Carbon Disulfide in the Workplace Air

Предложено использовать сорбционно-фотометрический метод для определения сероуглерода в воздухе рабочей зоны. Выбрана аналитическая система, образующая ярко окрашенный диэтанолдитиокарбаминат меди (II), и матрица (целлюлоза-фильтр), определены оптимальные условия анализа.The sorption-photometric method for determination of carbon disulfide in the workplace air has been proposed. The analytical system based on formation of colored diethanolcarbamate of copper (II) as well as matrix (cellulose filter) were chosen and the optimal analysis conditions were determined

Calculation of Protolytic Equilibria Parameters on a Surface of Some Carbon Adsorbents According to Potentiometric Titration Data

Constants and Gibbs energy values of neutralization were calculated for protolytic equilibria on carbon adsorbents based on anthracite, charcoal and brown coal. A proposal regarding composition of surface functional groups of these sorbents was made

Quantum Chemical Study of Atomic Structure and Spin States of the Cox(C60)n (x=1-8, n=1-3) Complex Nanoclusters

The main features of the local atomic structure of novel Con(C60)x (n=1-8, x=1-3) complexes and Con clusters as well were studied using the ab initio GGA calculations for a set of low and high energy isomers in different spin states. It is shown that high-spin low-symmetry structure of free-standing Con clusters is determined by Jahn-Teller distortions. For the Co(C60)x (x=1-3) isomers the spin state S=1/2 is energetically preferable whereas the low energy isomers of Co2(C60)x (x=1-3) have an intermediate spin state of S=1. The η2 (6-6 edge of C60) type of cobalt ion coordination is preferable for both n=1 and n=2 cases. The η2 (coordination with 6-5 edge) and even the η5 (C5 fragment) types serve as low and high energy intermediates for the cobalt ions migration around the C60 cage. Formation of cobalt dimers can be the final stage of evolution of Con(C60)x atomic structure approaching the equilibrium atomic geometry. For higher n (3-8) the formation of η2, η2 or η1 coordination bonds between Con fragment and C60 molecules through carbon hexagons results in stable complex nanoclusters with nonmonotonic change of average spin momentum upon the number of cobalt atoms in the Con cores. The theoretical results are compared with corresponding experimental data

Профилирование примесей в образцах синтетических каннабиноидов, изъятых из незаконного оборота в Сибирском регионе Российской Федерации

This article discusses the analysis of a database, i. e. chromatogram and mass spectra that were received from subdivisions of Criminal Expertise Centre of Directorate for Law Enforcement in Transport Means of Russian Ministry of Internal Affairs for Siberian Federal District and former Main Directorate of Federal Narcotics Control Service of the Russian Federation for Krasnoyarsk Territory within 2012–2016 when studying synthetic cannabinoids samples confiscated from illegal trafficking. Typical profile impurities of synthesis reagents were identified, as well as of substances that are fillers for the most wide-spread classes of synthetic cannabinoidsПроведен анализ массива данных – архива хроматограмм и масс-спектров, полученных в подразделениях Экспертно-криминалистического центра Управления на транспорте МВД России по Сибирскому федеральному округу и бывшего Главного управления Федеральной службы Российской Федерации по контролю за оборотом наркотиков по Красноярскому краю в период с 2012 по 2016 гг., при исследовании изъятых из незаконного оборота образцов синтетических каннабиноидов. Идентифицированы типичные профильные примеси реагентов синтеза, а также веществ – наполнителей для наиболее распространенных классов синтетических каннабиноидо

Sorption of Copper (II) from Aqueous Solutions on Complexing Ion Exchangers and Determination of Copper by Diffuse Reflectance Spectroscopy

Данная работа посвящена сорбционному концентрированию меди (II) из различных растворов на ряде комплексообразующих ионитов и последующему определению Cu (II) в фазе амфотерного ионита АМФ-2Т макросетчатой структуры спектроскопией диффузного отражения. Исследованы сорбционные свойства ионитов и рассчитаны кажущиеся константы устойчивости комплексов меди в фазе ионообменников. Предложен сорбционно-спектроскопический метод определения Cu (II) в водных растворах. Градуировочный график линеен в интервале концентраций 0.05 - 3.0 мг/л (объем пробы 25.0 мл), предел обнаружения составляет 0.03 мкг/мл. Присутствие Ni (II), Co (II), Cr (III), Fe (II,III), Zn (II), а также ионов C2O42- и PO43- (100-кратные избытки) не мешает определению Cu (II).The present paper is devoted to sorption concentration of copper (II) from different solutions on a number of complexing ion exchangers and subsequent determination of Cu (II) in a phase of amphoteric ion exchanger AMF-2T of macroreticular structure by diffuse reflectance spectroscopy. The sorption properties of the sorbents were investigated. The apparent stability constants for copper complexes in ion exchanger phase were calculated. The sorption-spectroscopic method is proposed for Cu (II) determination in aqueous solutions. The calibration curve is linear at concentration range 0.05 - 3.0 mg/L (sample volume is 25.0 mL) and the detection limit is 0.03 μg/mL. The presence of Ni (II), Co (II), Cr (III), Fe (II,III), Zn (II) as well as C2O42-and PO43-(100-fold excesses) does not hinder the determination of Cu (II)

E-LEARNING STRATEGY AT TECHNICAL UNIVERSITY

The paper explores emerging trends of modern society that have created tremendous impacts on higher education, both in worldwide and national scales. Implementing e-learning initiatives as the response of higher education institutions to major challenges isdiscussed. Educational process reforming through the use and development of e-learning technologies at the National Research Tomsk Polytechnic University is shown