The research and development of frequency-controlled electric drive

Рассмотрен подход к реализации автономного генератора на базе асинхронного двигателя с фазным ротором с подключением цепи статора к нагрузке и питанием роторных обмоток от регулируемого источника переменного тока, а также определены границы устойчивой генерации электроэнергии.The approach to implement a stand-alone generator based on an induction motor with a wound rotor connected to the stator circuit to the load and the power rotor windings from a regulated source of alternating current, and also defined the boundaries of sustainable electricity generation

Comparative analysis of the binding of thiacalix[4]arene-monocrown-ethers with monovalent metal salts using MALDI mass spectrometry

© 2016, Pleiades Publishing, Ltd.MALDI mass spectrometry is used for the first time for the rapid assessment of the binding of thiacalix[4]arene-monocrown-ethers with metal cations (Li, Na, K, Cs, Cu, Ag). The work is performed on examples of thiacalix[4]arene-monocrown-ethers in 1,3-alternate conformation with various numbers (m) of ethylene oxide units and various substituents in phenol groups. It is shown that thiacalix[4]arene-monocrown- ethers with m = 3, 4, 5, and 6 bind lithium, sodium, potassium, and cesium cations, respectively; in addition, the binding of cesium cations is stronger in the presence of aromatic substituents in the lower rim of thiacalix[4]arene-monocrown-ethers. Silver cations bind with calixarenes under study more intensely than copper ions. When aromatic substituents are present, the binding of silver cations is stronger than that of alkali metal ions with the studied thiacalix[4]arene-monocrown-ethers

Soliton-Magnon Scattering in Two-Dimensional Isotropic Ferromagnets

It is studied the scattering of magnons by the 2d topological Belavin-Polyakov soliton in isotropic ferromagnet. Analytical solutions of the scattering problem are constructed: (i) exactly for any magnon wave vectors for the partial wave with the azimuthal number m=1 (translational mode), and (ii) in the long- and short-wave limits for the rest modes. The magnon mode frequencies are found for the finite size magnets. An effective equation of the soliton motion is constructed. The magnon density of states, connected with the soliton-magnon interaction, is found in a long-wave approximation.Comment: 4 pages, REVTe

Dimethyl Sulfoxide Promotes the Multiple Functions of the Tumor Suppressor HLJ1 through Activator Protein-1 Activation in NSCLC Cells

Background: Dimethyl sulfoxide (DMSO) is an amphipathic molecule that displays a diversity of antitumor activities. Previous studies have demonstrated that DMSO can modulate AP-1 activity and lead to cell cycle arrest at the G1 phase. HLJ1 is a newly identified tumor and invasion suppressor that inhibits tumorigenesis and cancer metastasis. Its transcriptional activity is regulated by the transcription factor AP-1. However, the effects of DMSO on HLJ1 are still unknown. In the present study, we investigate the antitumor effects of DMSO through HLJ1 induction and demonstrate the mechanisms involved. Methods and Findings: Low-HLJ1-expressing highly invasive CL1–5 lung adenocarcinoma cells were treated with various concentrations of DMSO. We found that DMSO can significantly inhibit cancer cell invasion, migration, proliferation, and colony formation capabilities through upregulation of HLJ1 in a concentration-dependent manner, whereas ethanol has no effect. In addition, the HLJ1 promoter and enhancer reporter assay revealed that DMSO transcriptionally upregulates HLJ1 expression through an AP-1 site within the HLJ1 enhancer. The AP-1 subfamily members JunD and JunB were significantly upregulated by DMSO in a concentration-dependent manner. Furthermore, pretreatment with DMSO led to a significant increase in the percentage of UV-induced apoptotic cells. Conclusions: Our results suggest that DMSO may be an important stimulator of the tumor suppressor protein HLJ1 throug

MODELING OF THE SPRAY DRYING PROCESS OF GREEN PROTEIN SUSPENSION CONCENTRATE (PGC)

Development and implementation of high-tech and energy-efficient methods of feed production is important and ap¬propriate due to the fact that enterprises are not able to provide the market of feed consumers with high quality products at affordable prices. To solve this problem, an alternative technology for the production of protein green concentrate (PGC) from the cormophyte mass of high protein plants was developed. The most energy-intensive process of obtaining PGC is spray drying. At the same time the problems of energy saving, and the product quality are solved by modeling. The drying model developed in this study is based on the falling edge of evaporation, which is used in many studies of drops drying. The problem of obtaining the basic equations of heat and mass transfer during the periods of constant and decreasing drying rate was to be solved. It is also supposed that the drying takes place during the periods of constant and decreasing drying rate. Basic equations of heat and mass transfer for both periods of drying were obtained. Changing of thermophysical characteristics were determined by statistical methods in the range of PGC humidity of 10 ... 75% and a temperature of 20 ... 100%. The model is solved by finite difference method with an accuracy of modeling results of 12%. Method of finite differences is a numerical method for solving differential equations based on the replacement of derivative differences schemes and is the grid method. Identification of model parameters to experimental data obtained in the experimental spray dryer was carried out. The solution allows the mathematical model to determine the change in moisture content (DS concentration ) and drop radial temperature in the spray drying of the PGC concentrate that is necessary both to select the geometrical sizes of the dryer and the drying process parameters controlling