Theoretical Analysis of the Potential of Silver Carp Hypophthalmichthys Molitrix in the Control of Water Blooming by Different Species of Cyanobacteria

В работе проводится теоретический анализ возможности белого толстолобика (Hypophthalmichthys molitrix) контролировать «цветение» водоемов некоторыми видами цианобактерий. Для решения этой задачи построена имитационная модель, описывающая сообщество цианобактерий в абстрактном водоеме. В качестве моделируемых видов выбраны Anabaena flos-aquae и Microcystis aeruginosa. Модельные расчеты показывают, что интродукция рыб в водоем подавляет развитие Anabaena flos-aquae. «Цветение» воды, формируемое Microcystis aeruginosa, наоборот не сдерживается белым толстолобиком. Одной из причин такой реакции Microcystis aeruginosa на зарыбление водоема белым толстолобиком может быть стимуляция роста этого вида после прохождения через кишечник рыб.Таким образом, возможность белого толстолобика контролировать рост цианобактерий в масштабах целого водоема носит видоспецифичный характер, который необходимо учитывать при планировании мероприятий по ликвидации «цветений».The possibility to use silver carp (Hypophthalmichthys molitrix) in the control of water blooming by cyanobacteria is theoretically analyzed. To attain this goal the dynamic model has been developed, describing communities of two species of cyanobacteria: Anabaena flos-aquae and Microcystis aeruginosa, taking into account direct influence of silver carp on cyanobacteria growth - stimulation of cyanobacteria growth rate and cyanobacteria digestion in fish gut. The calculation results have shown that silver carp influences oppositely the formation of blooming by cyanobacteria species simulated. Reservoir stocking with silver carp inhibits the development of Anabaena flos-aquae species. The development of Microcystis aeruginosa is not constrained by silver carp. Forming blooming outbreaks by this species is possible even with increasing stocking. One of the possible reasons may be the fact that the Microcystis aeruginosa growth is stimulated after passing through fish gut. Therefore, when planning biomanipulations using silver carp it is necessary to take into consideration the relationship between fish and the different species of cyanobacteria. The success of such manipulations depends on what species of cyanobacteria are dominant in the ecosystem in the blooming period

DEFORM-3D Modeling in Continuous Extrusion of Copper Busbars for Installation Conform with the Pre-Chamber Matrix

В статье представлены результаты компьютерного моделирования непрерывного прессования методом конформ с использованием расширяющейся форкамерной матрицы, что позволило усовершенствовать конструкцию прессового инструмента. Показано, что установка матрицы внутри расширяющейся форкамеры и применение многоканального прессования значительно снижают объем мертвых зон, повышают равномерность течения металла в очаге деформации и пресс-изделийThe article presents the results of computer simulation of continuous extrusion method Conform with expanding pre-chamber array. allowing to improve the design of press tools. It is shown that the installation of the matrix within the prechamber and expanding the use of multi-channel compression greatly reduces the amount of dead zones increases the uniformity of metal flow in the deformation zone and reduces the appearance of marriage molding

Study Modification Technology for Casting Flat Bars 5XXX Series

В статье изложены результаты исследования влияния концентрации лигатуры в расплаве по сечению металлотракта на измельчение структуры слитка при полунепрерывным литье для двух вариантов подачи лигатуры, контроль модифицирующей способности методом ТР-1, а также представлена компьютерная модель распределения частиц лигатуры вдоль металлотракта. Дан анализ полученных результатов и сделан выбор рациональных вариантов подачи лигатурыThe article presents the results of investigation of influence of the concentration of ligatures in the melt over the cross section metallotrakta on structure refinement ingot at a semi-continuous casting for the two feeding options ligatures, modifying control ability by TR-1, and also presented a computer model of ligature of the particle distribution along metallotrakta. The analysis of the results and make a choice of rational variants of ligatures suppl

Origin and Evolution of High-Mg Carbonatitic and Low-Mg Carbonatitic to Silicic High-Density Fluids in Coated Diamonds from Udachnaya Kimberlite Pipe

Microinclusions of high-density fluids (HDFs) were studied in coated diamonds from the Udachnaya kimberlite pipe (Siberian craton, Russia). The presence of C-centers in the coats testifies to their formation shortly before kimberlite eruption, whereas the cores have much longer mantle residence in chemically different mantle substrates, i.e., peridotite-type (P-type) and eclogite-type (E-type). The carbon isotope composition indicates an isotopically homogeneous carbon source for coats and a heterogeneous source for cores. Microinclusions in the coats belong to two groups: high-Mg carbonatitic and low-Mg carbonatitic to silicic. A relationship was found between high-Mg carbonatitic HDFs and peridotitic host rocks and between low-Mg carbonatitic to silicic and eclogites. The composition of high-Mg carbonatitic HDFs with a “planed” trace-element pattern can evolve to low-Mg carbonatitic to silicic during percolation through different mantle rocks. The compositional variations of microinclusions in the coats reflect this evolution.</jats:p

The project of the compact media-accelerator for the two-stream superheterodyne free electron laser

 The results concerning the project of compact two-stream superheterodyne free electron lasers, which can be constructed on the basis of MLIA-accelerator, are represented. In the work is described the nonlinear theory of the multi-harmonic TSFELs and accomplished corresponding physical and project analysis. A specific characteristic of the considered system is the source of intensive relativistic electron beam is constructed on the basis of a two-beam MLIA-accelerator. The design-scheme of the compact MLIA-accelerator is proposed and analyzed. It is shown that main merit of studied devices is their potential compactness. </p

ПРОЕКТ КОМПАКТНИЙ МЕДІА-ПРИСКОРЮВАЧ ДЛЯ ДВОХ ПОТОКІВ СУПЕРГЕТЕРОДИННОГО ЛАЗЕРА НА ВІЛЬНИХ ЕЛЕКТРОНАХ

 The results concerning the project of compact two-stream superheterodyne free electron lasers, which can be constructed on the basis of MLIA-accelerator, are represented. In the work is described the nonlinear theory of the multi-harmonic TSFELs and accomplished corresponding physical and project analysis. A specific characteristic of the considered system is the source of intensive relativistic electron beam is constructed on the basis of a two-beam MLIA-accelerator. The design-scheme of the compact MLIA-accelerator is proposed and analyzed. It is shown that main merit of studied devices is their potential compactness. Приведены результаты проектирования компактного двопотокового супергетеродинного лазера на свободных электронах, который может быть построен на базе MLIA-ускорителя. Описаны нелинейную теорию мультигармоничного двопотокового лазера на свободных электронах и выполнен соответствующий физический и проектный анализ. Особая характеристика рассматриваемой системы - источник релятивистского электронного пучка построен на основе двопотокового MLIA-ускорителя. Предложены и проанализированы функциональная схема компактного MLIA-ускорителя. Наведено результати проектування компактного двопотокового супергетеродинного лазера на вільних електронах, який може бути побудований на базі MLIA-прискорювача. Описано нелінійну теорію мультигармонічного двопотокового лазера на вільних електронах і виконано відповідний фізичний і проектний аналіз. Особлива характеристика розглянутої системи − джерело релятивістського електронного пучка побудовано на основі двопотокового MLIA-прискорювача. Запропоновано і проаналізовано функціональну схему компактного MLIA-прискорювача

Formation dynamics of phase and elemental composition of the oxalate-calcium nephrolithes

BACKGROUND: Fundamental investigation of the issue how various factors influence on origin and behavior of the nephrolithiasis is very actual because of necessity of the information about of early diagnostic methods as well as a prognostication. So, the information about of formation dynamics of phase and elemental composition of oxalate-calcic nephrolithes pending of lifetime of one patient is useful.&#x0D; AIM: The aim of the investigation is to obtain the information about of elemental composition as well as phase composition of the one patient nephrolithes formed pending of lifetime.&#x0D; MATERIALS AND METHODS: In the paper the data of the careful investigation of the elemental and phase composition of the two nephrolithes ablated from one patient at different times are presented. First nephrolith had been ablated from the right kidney in the March of 2002 (patient was 41 years old), subsequently second that had been did from the left kidney in the December of 2019 (patient was 58 years old; the nephrolith was found in 2012). The study was carried out using mass spectrometry and atomic adsorption spectrometry with inductively coupled plasma, infrared spectroscopy, X-ray phase analysis, CHN/S analysis.&#x0D; RESULTS: Both calculi were calcium oxalate, predominantly Vevellite structures. The chemical composition of the both nephrolithes is alike. They contain microimpurities of all essential as well as conditionally essential elements. Quantities of the toxic elements in the nephrolithes are identical too. Microquantities of the nitrogen and sulphur indicate a presence of amino acids and proteins in the nephrolithes structure.&#x0D; CONCLUSIONS: The results indicate that the nephrolithes with invariable phase and elemental composition would be forming in the different kidneys of one patient pending of lifetime.</jats:p

Theoretical Analysis of the Potential of Silver Carp Hypophthalmichthys Molitrix in the Control of Water Blooming by Different Species of Cyanobacteria

В работе проводится теоретический анализ возможности белого толстолобика (Hypophthalmichthys molitrix) контролировать «цветение» водоемов некоторыми видами цианобактерий. Для решения этой задачи построена имитационная модель, описывающая сообщество цианобактерий в абстрактном водоеме. В качестве моделируемых видов выбраны Anabaena flos-aquae и Microcystis aeruginosa. Модельные расчеты показывают, что интродукция рыб в водоем подавляет развитие Anabaena flos-aquae. «Цветение» воды, формируемое Microcystis aeruginosa, наоборот не сдерживается белым толстолобиком. Одной из причин такой реакции Microcystis aeruginosa на зарыбление водоема белым толстолобиком может быть стимуляция роста этого вида после прохождения через кишечник рыб.Таким образом, возможность белого толстолобика контролировать рост цианобактерий в масштабах целого водоема носит видоспецифичный характер, который необходимо учитывать при планировании мероприятий по ликвидации «цветений».The possibility to use silver carp (Hypophthalmichthys molitrix) in the control of water blooming by cyanobacteria is theoretically analyzed. To attain this goal the dynamic model has been developed, describing communities of two species of cyanobacteria: Anabaena flos-aquae and Microcystis aeruginosa, taking into account direct influence of silver carp on cyanobacteria growth - stimulation of cyanobacteria growth rate and cyanobacteria digestion in fish gut. The calculation results have shown that silver carp influences oppositely the formation of blooming by cyanobacteria species simulated. Reservoir stocking with silver carp inhibits the development of Anabaena flos-aquae species. The development of Microcystis aeruginosa is not constrained by silver carp. Forming blooming outbreaks by this species is possible even with increasing stocking. One of the possible reasons may be the fact that the Microcystis aeruginosa growth is stimulated after passing through fish gut. Therefore, when planning biomanipulations using silver carp it is necessary to take into consideration the relationship between fish and the different species of cyanobacteria. The success of such manipulations depends on what species of cyanobacteria are dominant in the ecosystem in the blooming period