STUDY OF THE ACUTE TOXICITY AND COMBINED ACTION OF THE PESTICIDES ACREX AND ACTELIC

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Tecnologias e dispositivos de microondas que separam a pele da pele de coelho

The purpose of this work is the development of microwave technology and de-vices separating fur from rabbit skins in a continuous mode at reduced operating costs. They developed the method for the action of the ultrahigh frequency electro-magnetic field (UFEF), which provides the reduction of fur fiber holding power in the meat fabric of rabbit skins with simultaneous combing and gathering. They calcu-lated the mathematical dependences describing the dynamics of multicomponent raw material heating with the change of dielectric and physicomechanical parameters in the process of UFEF. They calculated and visualized the electromagnetic field distri-butions in the developed resonators, on the basis of which they substantiated the ef-fective parameters of the electrodynamic system: the maximum property, the quality of resonators and the electric field strength. They substantiated the complex of struc-tural and technological parameters of devices with new structural design of working chambers by a multi-criteria evaluation of the technological process for the separation of fur from rabbit skin. They manufactured and tested the microwave device under production conditions for the separation of fur from rabbit skin, and adjusted the op-erating modes, which allow to reduce operating costs. They evaluated the technical and economic efficiency of microwave technology introduction for the processing of fur and the devices for rabbit farms; they developed practical recommendations for the operation of microwave units to separate fur from rabbit skins.El propósito de este trabajo es el desarrollo de la tecnología de microondas y los dispositivos que separan la piel de los cueros de conejo en un modo continuo a costos operativos reducidos. Desarrollaron el método para la acción del campo electromagnético de frecuencia ultraalta (UFEF), que proporciona la reducción del poder de retención de la fibra de la piel en el tejido de carne de la piel de conejo con el peinado y la recolección simultáneos. Calcularon las dependencias matemáticas que describen la dinámica del calentamiento de materias primas de componentes múltiples con el cambio de los parámetros dieléctricos y fisicomecánicos en el proceso de la UFEF. Calcularon y visualizaron las distribuciones del campo electromagnético en los resonadores desarrollados, sobre la base de los cuales fundamentaron los parámetros efectivos del sistema electrodinámico: la propiedad máxima, la calidad de los resonadores y la intensidad del campo eléctrico. Ellos sustentaron el complejo de parámetros estructurales y tecnológicos de los dispositivos con un nuevo diseño estructural de las cámaras de trabajo mediante una evaluación de múltiples criterios del proceso tecnológico para la separación de la piel del cuero del conejo.  Fabricaron y probaron el dispositivo de microondas en condiciones de producción para la separación de la piel de la piel de conejo, y ajustaron los modos de operación, lo que permite reducir los costos operativos. Evaluaron la eficiencia técnica y económica de la introducción de la tecnología de microondas para el procesamiento de pieles y los dispositivos para granjas de conejos; desarrollaron recomendaciones prácticas para el uncionamiento de las unidades de microondas para separar las pieles de los cueros de conejo.O objetivo deste trabalho é o desenvolvimento de tecnologia e dispositivos que separam a pele de peles de coelho em um modo contínuo a custos operacionais reduzidos microondas. Eles desenvolveram o método para a acção do campo electromagnético de alta frequência ultra-(UFEF), que fornece pele de coelho carne tecido de pele para retenção de fibras de energia reduzido com cabelo e recolha simultânea. Calcularam as dependências matemático para descrever a dinâmica do aquecimento materiais multicomponentes com a mudança de dieltricos e parâmetros fisicomecánicos no processo de UFEF. Eles calculado e visualizado as distribuições de campo eletromagnético em ressonadores desenvolvidos, com base na qual fundamentar os parâmetros reais do sistema electrodynamic: a propriedade máximo, a qualidade dos ressonadores e intensidade do campo elétrico. Eles sustentadas parâmetros estruturais e tecnológicas complexas dos dispositivos com um novo design estrutural das câmaras de trabalho através de uma avaliação multi-critérios do processo tecnológico para a separação de couro pele de coelho. Eles fabricado e testado o dispositivo de micro-ondas, sob condições de produção para a separação da pele da pele de coelho, e modos de operação ajustados, reduzindo assim os custos operacionais. Eles avaliaram a eficiência técnica e econômica da introdução de tecnologia de microondas para o processamento de dispositivos fazendas de peles e de coelho; desenvolveu recomendações práticas para a operação de unidades de microondas para separar peles de peles de coelho

Dynamics of Nanometer-Scale Foil Targets Irradiated with Relativistically Intense Laser Pulses

In this letter we report on an experimental study of high harmonic radiation generated in nanometer-scale foil targets irradiated under normal incidence. The experiments constitute the first unambiguous observation of odd-numbered relativistic harmonics generated by the $\vec{v}\times\vec{B}$ component of the Lorentz force verifying a long predicted property of solid target harmonics. Simultaneously the observed harmonic spectra allow in-situ extraction of the target density in an experimental scenario which is of utmost interest for applications such as ion acceleration by the radiation pressure of an ultraintense laser.Comment: 5 pages, 4 figure

ХАРАКТЕРИСТИКИ ЭЛЕКТРОПОТРЕБЛЕНИЯ СВЕТОДИОДНЫХ СВЕТОВЫХ ПРИБОРОВ И ИХ УЧЕТ ПРИ РАСЧЕТЕ ЭЛЕКТРИЧЕСКИХ СЕТЕЙ

The indicators of power consumption of lighting devices based on LEDs are studied depending on the supplied voltage. For the lamp and floodlight with LEDs active and reactive power, current and power factor as a function of voltage (which value changed in the range 200–245 V) were experimentally determined. The analysis of experimental data demonstrated that due to the drivers in the specified voltage range the active power consumed by light devices remains practically unchanged. The reactive power of LED devices depends on the supplied voltage and is capacitive in its nature. In contrast with gas-discharge light sources the LED devices under study do not consume reactive power, but generate it. With the change of the supplied voltage from 200 to 245 V the value of the generated reactive power increases to 60 % for the floodlight and 50 % for the lamp. The LED floodlight has a low coefficient of active power. The current consumed by the floodlight has increased by 22 %, and by the lamp – by 13 %. The formulas for determining the maximum value of the length of the calculated section of single-phase group lines were developed, taking into account specific source data. LED light sources tend to feed by electric power by single-phase group lines. The number of lamps connected to single-phase lines is regulated by normative documents. Bearing this in mind as well as the small power of LED sources single-phase group lines are usually performed with conductors of the smallest possible cross section. The limit values of the length of the calculated section that correspond to a predetermined loss of voltage in line with ambient temperature from 15 to 60 °С were determined for them. The calculations demonstrated that for group lines that feed the LEDs, the choice of conductor cross-sections in accordance with permissible voltage loss is not critical. The determinant factor for the choice of the cross-section of the conductors of group electrical networks is the calculation of acceptable heat with respect to temperature of the environment.Исследованы показатели электропотребления световых приборов на основе светодиодов в зависимости от подведенного напряжения. Для светильника и прожектора со светодиодами экспериментально определялись активная и реактивная мощности, ток и коэффициент мощности в функции напряжения, величина которого изменялась в диапазоне 200–245 В. Анализ экспериментальных данных показал, что благодаря применяемым драйверам в указанном диапазоне напряжения потребляемая световыми приборами активная мощность остается практически неизменной. Реактивная мощность светодиодных приборов зависит от подведенного напряжения и носит емкостный характер. В отличие от газоразрядных источников света исследованные светодиодные приборы не потребляют, а генерируют реактивную мощность. С изменением подведенного напряжения от 200 до 245 В генерируемая реактивная мощность увеличивается на 60 % у прожектора и на 50 % – у светильника. При этом светодиодный прожектор имеет низкие значения коэффициента активной мощности. Ток, потребляемый прожектором, возрастает на 22 %, а светильника – на 13 %. Получены формулы для определения предельного значения длины расчетного участка однофазной групповой линии с учетом конкретных исходных данных. Светодиодные источники света, как правило, питаются по однофазным групповым линиям. Количество ламп, подключаемых к однофазным линиям, регламентируется нормативными документами. С учетом этого и небольшой мощности светодиодных источников света однофазные групповые линии обычно выполняются проводниками, имеющими минимально возможное сечение. Для них определены предельные значения длины расчетного участка, соответствующие заданной потере напряжения в линии при температуре окружающей среды от 15 до 60 °С. Расчеты показали, что для групповых линий, питающих светодиодные световые приборы, выбор сечений проводников по допустимой потере напряжения не имеет определяющего значения. Определяющим при выборе сечений жил проводников групповых электрических сетей является расчет по допустимому нагреву с учетом температуры окружающей среды

The Study of the Relationship Between Resilience and Personal Characteristics of Students

В статье раскрываются понятие жизнестойкости, особенности проявления данного феномена у современных студентов. Представлены результаты исследования жизнестойкости и личностных особенностей студентов методами сравнительного и корреляционного анализа.This article reveals the concept of resilience, the features of the manifestation of this phenomenon in modern students. The results of the study of the influence of students ' resilience and personal characteristics using comparative and correlation analyses are presented

In vitro bioactivity of biphasic calcium phosphate silicate glassceramic in CaO-SiO2-P2O5 system

The main purpose of the paper is the evaluation of the influence of chemical composition of the gel of the synthesized 15CaO·0.5P2O5·6SiO2 glass-ceramic on the structure, crystallization behaviour and in vitro bioactivity in static conditions for different periods of time - 3, 9 and 30 days in 1.5SBF. The obtained glass-ceramic was synthesized via polystep sol-gel technique. The structure of the prepared and the one thermally treated at 1200°C for 2 h powder was studied by XRD, 29Si MAS NMR, FTIR and SEM

Building professional discourse in emerging markets: Language, context and the challenge of sensemaking

Using ethnographic evidence from the former Soviet republics, this article examines a relatively new and mainly unobserved in the International Business (IB) literature phenomenon of communication disengagement that manifests itself in many emerging markets. We link it to the deficiencies of the local professional business discourse rooted in language limitations reflecting lack of experience with the market economy. This hampers cognitive coherence between foreign and local business entities, adding to the liability of foreignness as certain instances of professional experience fail to find adequate linguistic expression, and complicates cross-cultural adjustments causing multi-national companies (MNCs) financial losses. We contribute to the IB literature by examining cross-border semantic sensemaking through a retrospectively constructed observational study. We argue that a relative inadequacy of the national professional idiom is likely to remain a feature of business environment in post-communist economies for some time and therefore should be factored into business strategies of MNCs. Consequently, we recommend including discursive hazards in the risk evaluation of international projects