Evoked potentials in immobilized cats to a combination of clicks with painful electrocutaneous stimuli

Averaged evoked potentials in the auditory, somatosensory, and motor cortical zones, as well as in the mesencephalic reticular formation were recorded in acute experiments on nonanesthetized, immobilized cats. Omission of the painful stimulus after a number of pairings resulted in the appearance of a delayed evoked potential, often resembling the late phases of the response to the painful stimulus. The characteristics of this response are discussed in comparison with conditioned changes of the sensory potential amplitudes

IR Thermographic System Supplied with an Ordered Fiber Bundle for Investigation of Power Engineering Equipment and Units

In this article, the authors propose an IR imaging system, supplied with an IR bundle of ordered silver halide fibers, for the acquisition of 2D temperature field distribution in hard-to-reach places. We assessed crosstalk between neighboring individual fibers of the bundle, carried out calibration of the IR imaging system, and determined modelled defects using this system. The results showed the applicability of the system for the inspection and investigation of power engineering units. Keywords: IR fiber bundles, IR thermography, internal defects detectio

Fiber-optical system for FTIR spectrometer with diamond ATR unit based on AgBr-(KRS-5) fibers

Разработан и изготовлен опытный образец волоконно-оптической системы к ИК-Фурье спектрометру с алмазной НПВО приставкой на основе световодов AgBr-(КРС-5). Преимущества этой системы связаны с расширенным диапазоном пропускания до 41,6 мкм (по сравнению с известными оптическими волокнами), увеличенной фотостойкостью, уменьшенными оптическими потерями на длине волны 10,6 мкм вследствие введения КРС-5 в решетку исходных галогенидов серебра. Предполагаемое использование результатов и продукции: в ИК-спеткроскопии, где необходим онлайн мониторинг химических реакций и процессов при агрессивных условиях среды (производство удобрений, фармацевтическая и нефтехимическая промышленность).The pre-production model of fiber-optical system for FTIR spectrometer with diamond ATR unit based on AgBr-(KRS-5) fibers was developed and manufactured. Advantages of AgBr-(KRS-5) system are concerned with transparence range, expanded up to 41,5 µm (in comparison with well-known optical fibers), increased photostability, reduced optical losses at 10,6 µm due to KRS-5 introduction into parental silver halide lattice. Prospective application of results and output: in IR spectroscopy, where the chemical reaction and process on-line monitoring is needed in aggressive ambient (fertilizer production, pharmaceutical and petrochemical industries).Программа развития УрФУ на 2013 год (п.2.1.2.1

The effect of humic acids on the natural resistance of the body of broiler chickens and the quality of their meat

ArticleThe aim of the work is to study the effectiveness of the concentration of humic acids of Reasil Humic Vet feed additive on the increase of the feed bioavailability for poultry and the probability of its negative impact on the safety and marketable characteristics of the final product. Studies were conducted on the basis of the Saratov State Agrarian University in two similar groups of broiler chickens ‘Cobb 500’, 100 heads each. Poultry feeding consisted of the same complete feed, but the drinking water for the broilers of the experimental group was enriched by humates in the amount of 0.5 ml L -1 . Based on the data obtained by daily weighing of the poultry and considering the feed intake, a positive trend of the influence of the feed additive on the average daily weight gain and feed conversion per unit of production was noted. The results of slaughter and anatomical cutting of broiler carcasses revealed that metabolic processes were more active in the body of an experimental poultry, reflected in the intensive growth of muscle tissue and fat deposition, which contributed to an increase in the yield of edible parts from carcasses by 9.9%. Studies of composition of broiler blood indicate non-toxicity of the recommended concentration of humates in the feed additive, its stimulation of non-specific resistance of the organism, contributing to the functioning of the immune system and the development of internal organs and, as a consequence, ensuring the safety of the products obtained from them

Integral Neutron Multiplicity Measurements from Cosmic Ray Interactions in Lead

Sixty element 3He neutron multiplicity detector systems were designed, constructed and tested for use in cosmic ray experiments with a 30-cm cube lead target. A series of measurements were performed for the cosmic ray configuration at ground level (3 meters water equivalent, mwe), in the St. Petersburg metro tunnel (185 mwe), and in the Pyhäsalmi mine in Finland (583 and 1185 mwe). Anomalous coincidence events with charged cosmic ray particles at sea level produced events with 100-120 neutrons due possibly to the total disintegration of the Pb nucleus. These events were also detected at 185 mwe, but the particles causing such disintegration are currently unidentified. We present examples of preliminary data from the various measurements and discuss future plans for underground experiments including possible searches for Weakly Interacting Massive Particles (WIMP, dark matter)

Optical Fibers Based on Modified Silver Halide Crystals for Nuclear Power

We investigated the possibility of the deployment of AgBr – TlBr0.46I0.54MIR fibers in high ionizing radiation environment. For this purpose, we exposed plate samples made of AgBr – TlBr0.46I0.54crystals to β-ionizing radiation at a dose of 100 kGy. We revealed the radiation-induced translucence effect for these materials and assumed its nature. As the investigation showed the suitability of the fibers for the application in high ionizing radiation environment, the authors propose to use these fibers jointly with FTIR spectrometers for the online monitoring of various chemical processes at the nuclear power plants. Keywords: modified silver halides, MIR fibers, FTIR spectroscopy, ionizing radiation resistanc

Transmission of thermal imaging by using infrared bundle based on silver halide solid solution

In this study, infrared bundle consisting of seven single fibres was manufactured. Experiences on transmission of the heated object thermal image was performed. The experimental data show that there is a fundamental possibility of thermal image transmission through the infrared bundle. © Published under licence by IOP Publishing Ltd