Temperature and Concentration Effects of Aqueous Solution of Sodium Octanoate on Micelle Formation Measured by Small angle X-ray Scattering

Characteristic sizes of sodium octanoate micelles have been determined (by nucleus radius) with the use of small angle X-ray scattering technique at various molar concentrations, which are for a spherical shape 1 and nonspherical 1.2 nm, respectively. The value of the critical concentration for micelle formation (CMC2) has been also found equal to 0.7 M. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3628

Mechanisms of Ions Adsorption by Nanodiamonds in Aqueous Suspensions

This work is devoted to the study of adsorption properties and adsorption mechanisms of the original (I6), modified (I6COOH) nanodiamonds and charcoal dispersed in water, with respect to dissolved ions (Cu2 +, Pb2 +, NO3 –, CH3COO –) using optical spectroscopy methods: Raman and IR spectroscopies, absorption, dynamic light scattering. Mechanisms of anions and cations adsorption were studied. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3365

Improving the resilience of neural network solution of inverse problems in Raman spectroscopy to the distortions caused by frequency shift of the spectral channels

В данной работе рассматривалась задача определения концентраций растворенных в воде ионов посредством спектроскопии комбинационного рассеяния света. В настоящее время не существует адекватных математических моделей, описывающих исследуемый объект, поэтому практически единственным способом решения рассматриваемой задачи является применение методов машинного обучения с использованием экспериментальных данных. Вследствие того, что любые данные, полученные экспериментальным путем, содержат шум, возникает необходимость в разработке специальных подходов к повышению устойчивости решения к шумам в данных. Применительно к рассматриваемой задаче, данные могут содержать искажения следующих типов: неточности в заданных концентрациях ионов, возникающие при приготовлении растворов, погрешности измерения интенсивности каналов спектра и смещение частоты каналов спектра, вызванное изменением юстировки экспериментальной установки. Настоящая работа посвящена разработке подходов к повышению устойчивости нейросетевого решения к искажениям, обусловленным смещением частоты каналов спектра. In this study, we considered the problem of determining the concentrations of ions dissolved in water by the spectra of Raman scattering of light. At the moment, there are no adequate mathematical models describing the studied object, so in fact the only way to solve this problem is the use of machine learning methods based on experimental data. As any data resulting from experimental measurements contain noise, there is a need to develop specific approaches to improving the resilience of the solution to noise in the data. Regarding the studied problem, experimental data may contain distortions of three types: variations in the concentrations of ions, error in the determination of the intensity in the channels of the spectra, and frequency shift of the channels of the spectrum. This study is devoted to the development of approaches to improve the resilience of the neural network solution to the distortions caused by the shift of the spectral channels.Работа выполнена за счет гранта Российского научного фонда (проект № 14-11-00579)

Survey: Application of Neural Networks in Physical Research in Scobeltsyn Nuclear Physics Institute, Moscow

This paper is the survey of research projects being conducted by our group in the Nuclear Physics Institute of Moscow State University in the area of development of neural network methods for registration, analysis, processing and classification of patterns. The results of investigations have found application in a wide range of practical problems, in particular, in the fields of medicine and neurophysiology, ecological monitoring of natural waters, non-linear laser spectroscopy, temperature measurements in plasma, and in investigations of solar wind - geomagnetosphere interaction. Medicine [1

The impact of temperature on the degree of structurization of water of different isotope composition

Using vacuum ultrafiltration radiation and the method of dynamic light scattering employing samples of light (D/H = 6 ppm), distilled (D/H = 150 ppm) water and the water with an increased content of deuterium (D/H = 7700 ppm, 99.96%) as an example within the interval 4–80°C the impact of temperature on the degree of water structurization of the different isotope composition was studied. Experimentally has been established the sizes of optical inhomogeneties of studied waters at various temperatures. It has been shown that temperature relationships of these types of water obtained by these methods have a graded nature with clear-cut critical points at 4; 36; 45 and 60–70°C. © 2017, Allerton Press, Inc

The impact of temperature on the degree of structurization of water of different isotope composition

Using vacuum ultrafiltration radiation and the method of dynamic light scattering employing samples of light (D/H = 6 ppm), distilled (D/H = 150 ppm) water and the water with an increased content of deuterium (D/H = 7700 ppm, 99.96%) as an example within the interval 4–80°C the impact of temperature on the degree of water structurization of the different isotope composition was studied. Experimentally has been established the sizes of optical inhomogeneties of studied waters at various temperatures. It has been shown that temperature relationships of these types of water obtained by these methods have a graded nature with clear-cut critical points at 4; 36; 45 and 60–70°C. © 2017, Allerton Press, Inc