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The article presents research on kinetics of sinter reduction used as a charge in the process of simultaneous smelting of zinc and lead, commonly known as Imperial Smelting Process. The aim of the study was to determine the effect of reductivity of various sinters produced from sulphide raw materials and from waste oxides on the operation of a shaft furnace. Real sinter samples from the sinter plant operating at the ISF furnace were collected for the experiment. The experiment was carried out in a resistance furna...

This paper presents the experimental results regarding the evolution into time of the road concrete quality with blast furnace slag BS, obtained by the UPV test for measuring the propagation velocity of the ultrasonic pulses compared with the compressive strengths of mechanical tests The UPV and the compressive strengths of the concrete containing blast furnace slag were determined at the age of 28, 100 and 150 days on 150 mm cubes on road concrete made with conventional materials and on road concrete with blast f...

The methodology of obtaining the morphometric characteristics of large ice features by means of the improved technology of water thermal drilling with the drilling rate record to a logger is discussed in the article. Possibilities of diverse application of technology of thermal drilling (also for study of physical-mechanical ice properties) and perspectives of its development are shown. Peculiarities of data processing and analysis by the internal structure of ice ridges and stamukhas are considered. Specific char...

The aim of this work is to study the erosion and stability of rock cliffs. The selected sites are located in the Cuio and Kalohanda areas from the southern sector of the Baia-Farta municipality, on the coast of the Province of Benguela, central-western Angola. The fourteen studied sites are situated nearby fishing villages and present two distinct climate seasons: the rainy season and the dry season. The studied area presents a huge potential for economic activity related with tourism. The rock cliffs are mainly c...

The aim of the paper is to investigate the correlations between the parameters and mineralogy of agricultural soils contaminated by hazardous elements originated from the metallurgical industry. The mineralogical constituents of soil have a major influence on soil fertility and production capacity, as well as on migration and assimilation in various proportions of the elements both with nutritional role for plants and potential toxic ones. The importance of the study originates from the necessity of knowing the so...

This article presents results of researches of genesis and physical and chemical properties of humic acids of peat stratigraphic rigging of the Ob-Irtysh interfluve, selected in the area of The Mukhrino Field Station of the UNESCO chair of Yugra State University. The coordinates of the selection: 60.89535 N?68.639033 E. Ash content of peat does not exceed 12%. The effect of botanical composition of the original plants of the peat-forming plants of peat type on the construction of the macromolecules of humic acids ...

Particulate matter and heavy metals represent some of the most dangerous pollutants along with nitrogen and sulfur oxides and the persistent organic pollutants. They affect not only human health, but also all living things and, some of them, even the climate by light diffusion and/or greenhouse effect. Thus, PM2.5 can induce serious respiratory and cardiovascular diseases, while both PM2.5 and PM10 play an important role in the atmospheric chemical and physical processes. At their turn, even though some heavy meta...

Gypsum composites with different lightweight aggregates were studied. The importance of gypsum as one of the most environmentally friendly building binder increases nowadays and new ways of its utilization are searched. Using of aggregates in the gypsum is generally not necessary, because gypsum does not shrink, but they can be used for economic reasons or to improve the thermal or fire properties of the gypsum material. We studied the structure and properties of the gypsum composites with three types of lightweig...

The treatment of model solutions containing Fe(II), Mn(II) and Ce(III) salts in the range of metal ions concentrations of 20-500 mg/dm3 was carried out at the laboratory set of water purification by low-temperature plasma discharge during the registration of changes in the Red-Ox potential and pH of solutions, the ions concentration and the emission discharge spectrum. The ions concentration was measured by atomic absorption spectroscopy. The characteristic of discharge was measured with the methods of emission sp...

In this work, novel sorption material based on cellulose and polyvinyl alcohol cross-linked by calcium ions is obtained. In order to increase the oil capacity of the sorbent, the mineral glauconite, which has a natural sorption capacity concerning oil, was introduced into the cross-linked polymer matrix. The structure of the obtained polymer sorbent was studied: the method of infrared spectroscopy was used to study the effect of calcium chloride on the cross-linking of polymer components, optical microscopy was us...

As a basic number, a genealogical line of Holstein-Friesian cows within SCDA Craiova was selected with common genes from the bull STARBUCK (Canada) brought by their grandchildren 51801 and 52150 via BESNE BUCK (France), 52506 and 52507 via SABBIONA BOOKIE USA) and the great grandchild 52569 via FATAL (USA); Genetic assays for production are based on 305 days of lactation production in the Maturity Equivalent (ME) of each cow. The dairy cows within SCDA Simnic are subject to official control of milk production. Thi...

The analysis of reproductive performance in selected cows within SCDA Simnic Craiova, the obtention of the first generation and the exploration of the biological characteristics of the obtained youth, took into account the following breeding indices: calving interval (CI), determined as days between two consecutive parturitions; (SP) service period, determined as days from parturition to conception; number of inseminations per conception (NIC); Conception rate (RCv) determined as a percentage of fertilized insemin...

Construction and subsequent operation of port complexes leads to increased anthropogenic load on coastal and marine areas. An effective compensatory measure for load reduction is the organization in the neighboring parts of the shores of protected nature areas. We present the study results of the impact of nature protected areas to stabilize the ecological situation in the anthropogenic transformed coastal zone on the example for the port of Bronka, commissioned in 2015. The objects of study are the territory of t...

In the study, heavy metal concentrations were determined from the Certej creek, basin in surface waters by using inductively coupled plasma emission spectrometry as an analytical method (ICP-OES). In order to assess the toxicity effects, the toxicity of various elements such as ( As, Cd, Cr, Cu, Pb, Ni, Zn etc.) were studied, these elements having an increased toxicity even at low concentrations. The purpose of this work is to determine their concentrations by the inductively coupled plasma emission spectrometry m...

3D modelling of the geology formations of the earth is an essential step towards understanding of complex geological phenomena and must be based on the whole of knowledge and available data for the study area (digital terrain models, geological and geophysical maps, sections, drill-holes and geological interpretation). 3D GeoModeller software made by Intrepid Geophysics Co. was designed to assemble together into the same 3D space data from various sources, in order to ensure geometrical coherence. For interpolatio...

It is known that the solar-moon tides (SMT) influence often serves as a trigger releasing seismic energy in a prepared area of the earth's crust. The regular increase in the number of earthquakes during the syzygy and perigee was empirically determined at the end of the 19th century by A. Perret [1]. The tidal force reaches its highest value when the perigee coincides with syzygy, which occurs once a year. The such pattern is observed for rock bursts (RB) also. However, it should be noted that the most tide influe...

Industrially defatted non-dehulled sunflower meal (SFM) with a protein content 22%, fibre 38% and cellulose 23% was separated into several fractions: protein fraction and lignocellulosic fraction, then they can be used for bioconversion into value added products. The protein concentrate (PC) contained 83% of protein. Hydrolysis of this concentrate by the commercial proteases, such as Proteinase T, Protex 7L, Protex 40E (Danisco Genecor, Denmark) and Pancreatin (Biosynthesis, the Russian Federation) can transform t...

The paper deals with the effective management of rainwater. Given the current climate change, which is currently faster than anticipated, environmental issues are very timely. These sudden changes are mainly caused by human activity. The most noticeable climate change is the increase in temperature and changes in the rainfall regime. These two changes are closely linked. The average consumption of drinking water per capita is over 100 liters of water per day in civilized advanced nations. But about 50% of this con...

Between 1990 and 2015, the annual global amount of CO 2 emission generated by transport has increased by 68%, from around 4.6 GtCOGtCO2 to aroaround 7.7 GtCOGtCO2. Technological advances towards eco -friendly vehicles and policy incentives promoting environmentalenvironmental-friendly modes of transport have thus been offset by economic growth and increasing mobility. This study questions the relationship between ec onomic growth and sustainability performance of transport sector. It adds to the literature new ins...

The influence of material resource flows in geosystems on formation of consumer value and the cost of high-tech products has been studied. For example, the flow of energy resources obtained indicators of impact of reducing their cost on the prices of high-tech goods. The occurrence of a cumulative effect in high-tech industries with multistage processing of resources is shown. Cumulation of reduced costs is formed. As a result, synergy of economic efficiency arises in geosystems. A mathematical model of the synerg...

The goal of this work is to study the processes of producing carbon aerogels, silica-carbon aerogels and CNT-silica aerogels and search for new areas of their applications. To achieve this goal, aerogels using the sol-gel method and the supercritical drying process were synthesized. The analysis of the obtained aerogels was carried out using the methods of nitrogen porosimetry and scanning electron microscopy. In addition, a software that uses cellular automaton models to generate virtual structures of the studied...

It was found that the mechanically activated highly dispersed component based on saponite-containing waste of the diamond industry allows us to improve the physicomechanical characteristics of fine-grained concrete due to the formation of hydrosilicates of additional generation. According to the working hypothesis, the resulting new formations are submicrocrystals of the tobermorite group. The objective of this study was to identify the products of the hydration of clinker minerals with a component on the basis of...

In this paper, we present an area, from the NV of the Transylvanian Basin, which has a particular geological structure. The complex geological aspects begin to be clarified once the Geological Maps 1: 50,000 were made. There is a marginal area in the North-East part, which is a monocline which sinks to the South and South-East. This marginal area is delimited by the sloping area through an important fracture, in the direction of Valley Calda - Gadalin - Gherla. Southwest of this fracture is the area with salt. The...

The aim of the paper is to develop communication skills on professional topics to students studying oil and gas activity. We argue that it is effective to organize the teaching by means of using professional context, developing lexical skills. In order to design a professional context we suggest role-play activities related to oil and gas theme for students; development of lexical skills is possible in both language exercises and communicative ones. Methods of research presuppose theoretical analysis of relevant l...

In Poland, for several years the needs and possibilities of introducing a multi-dimensional cadastre have been considered. The European Union provides the Member States with a legal framework in the form of a norm regulating the development of broadly understood land administration systems. The cadastre, as a source of information about land and people who manage it, must above all enable proper land management. The basic aspect that we encounter in the discussion about the cadastre is the determination of the spa...

In recent decades the crisis of obtaining natural organic raw materials attracts the attention of researchers to the use of renewable plant resources, to their deep processing in order to obtain the maximum yield of useful products. One of the most promising types of organic raw materials is spruce wood. Special attention of researchers to spruce wood is determined by its large reserves in Russia, the characteristics of its physicochemical properties and the composition of components. In this regard, studies have ...

Scientific and technical progress created conditions for rapid development and introduction in surveying - geodetic production essentially and qualitatively new measuring and processing technologies. These technologies lay the foundation of formation and practical application of results of the geodetic measurements differing in more productivity, technological effectiveness and essentially important - bigger accuracy in comparison with traditional technologies [1]. Installation of the permanent base station of dif...

The purpose of this paper is to investigate the environmental effects of the telecommunications usage, residential and business, by assessment of the changes in the energy consumption in Bulgaria during the period 1994-2018. Bulgaria is one of the EU countries with the largest decline in energy consumption during the last decades. Many factors influence the amount and efficiency of energy consumption. The present research is based on the assumption that telecommunications cause energy consumption. The change and t...

The upward trend in Earth's surface temperature observed is the most visible manifestation of ongoing climate change, especially since the second half of the eighty?s and especially in Slovakia since the early 1990s of 20th century. While the global average temperature of the ground-level atmosphere has risen by almost 1 ° C since the early 20th century, central Europe, including Slovakia, it has twice as fast warming (at least 2 °C) over the same period. For the purposes of designing and assessing cement-concrete...

Loop heat pipe is ingenious cooling device to remove waste heat from power electronic elements used in the specific applications e. g. where does not require forced cooling and where is not space for placement a big air cooler. Loop heat pipe transfer heat through the phase change of the working medium circulating in closed loop of the loop heat pipe. Ingenious of this device is in the heat transport without using any moving elements and gravity field. This work deal with experimental evaluation of cooling efficie...

The asphalt pavement materials which are after the Life cycle can be used in the production of new asphalt mixtures. If its quality of material is not suitable for the production of asphalt mixtures (inhomogeneity of material, soil content, etc.), the material can be used in unbound layers of pavements. The Road materials (new or recycled) are exposed during the operation to the effects of traffic loads and climatic influences, in particular changes in air and humidity temperatures, which are reflected by cyclical...

Phosphorus is the most important biogenous element that is fundamentally necessary for biological reproduction in all its forms. The occurrence of phosphorus, in the Earth?s crust like carbon, is an example of geochemical relations. Approximately 170 known phosphor minerals in nature. The basic supplies of phosphorus in the earth crust concentrates in apatite that bonds about 95% of the total quantity of phosphorus in the lithosphere. Phosphates - of world production (80%) comes from sedimentary deposits. We have ...

One of many factors determining the success of the future exploitation of oceanic polymetallic nodules is the amount of resources and the accuracy of their estimation. The potential exploitation requires accurate estimation of resources classified as measured resources according to the Australian JORC Code (The Joint Ore Reserves Committee Code). The issue of the accuracy of polymetallic nodule resources estimation was analyzed in the area of the Clarion-Clipperton Fracture Zone in the Pacific administered by the ...

The research of some features of the population distribution in the North of Russia has been presented in the paper. The aim of the research is to reveal systemic and prospective problems of population density estimating in Russia?s northern regions. The objects of the research were the subjects of the Russian Federation, fully or partially located in the Zone of the North. The population density in the North of Russia has been analyzed in the paper. The information concerning the area of the Russian Federation?s ...

The forests represent an important ecostabilizing factor in the country and soil is a component of the environment conditional on biodiversity, nutrition and the existence of life. Currently, there is shifting the focus from the protection of the soil fund area to the protection of soil and forest quality, while understanding the production function of soil and forest as part of their environmental function. The paper?s aim is to describe the chemical and physical characteristics of soils of the mixed forests. The...

This paper deals with the calculation of rock volume located in the hard-to-reach terrain of a water dam. During the reconstruction of the safety slip of the water dam, it was necessary to remove this rock and to determine the volume extracted at a particular stage of the construction. In addition, calculations of the total amount of rock above the given coordinates of the reconstruction project were solved. The reason was the need to know the amount of rock that still needs to be excavated to get the builders to ...

Operations conducted by petroleum industry generate a whole range of drilling waste materials. In oil & gas industry, the most common wastes consist of used oil or water-based drilling fluids, bore dusts, and cuttings. The chemical composition of drilling waste and its toxicity depend primarily on the geological and technological conditions of drilling, the type of drilled rock deposits, type and composition of the spent drilling mud and also on solids control equipment. Sustainable waste management became one of ...

In recent years we see a growing interest in renewable and green energy sources. Particularly noteworthy are photovoltaic system PV which can provide us with energy from solar radiation. The most important factor for such an installations is solar insolation. Concentrator technology allows to focus solar light on the surface area of the solar panels which allow us to increase the electricity production. There are many solutions which grant us the possibility to increase the performance of PV installation, for exam...

The authors studied the change in the content of dissolved total iron, pH, Eh and mineralization of water bodies of the Azov sea catchment were constructed according to the megaprofile "Mine waters of the coal mining area, sedimentation and aerators ponds, small rivers (Eastern Donbass) ? Don River - Taganrog Bay - Azov Sea". The content of total dissolved iron decreased when moving from the area of mine waters to the Azov Sea, and the values of the hydrogen index, in the same direction, increased. For mineralizat...

The information system interface consists of various elements. Attention of the user decreases when working with a large amount of information. The authors suggest that it is possible to implement recommendatory (adaptive) modules for users, using changes in the graphical part of the interface. Such changes are called interface personalization. Personalization allows you to focus the user's attention on the most relevant elements of the user. To reduce the resource consumption of recommendation modules, it makes s...

Reducing CO2 emissions results in decarbonisation and in consequence ? mine closure. There is a need to find innovative solutions for economical managing of abandoned sites, while ensuring risks to public and the environmental safety. This new approach to repurposing mine sites, which was presented in the article may take advantage of existing mine infrastructure and contribute to the local community, environmental and economy after the mine has been closed down. The aim of this study is to present potential benef...

Accumulation of trace elements in aquatic organisms is an important problem associated with environment pollution and with their utilization for consumption purposes. The aim of the conducted research was to assess the content of Zn, Co and Ba in water and in selected organs of fish of blotched picarel (Spicara maena L.) and haddock (Merlangius euxmus L.), from Karantinna and Balaklava Bays in the region of Sevastopol. The second aim was to determine the level of bioaccumulation of these elements in organisms used...

Here we report immobilization of GOx on magnetic silica: (i) nanoparticles Fe3O4 with silica coating (Fe3O4-SiO2) and (ii) mesoporous silica with incorporated nanoparticles Fe3O4 (SiO2-Fe3O4) functionalized with amino groups using glutaraldehyde as a linker. Magnetic support based biocatalysts demonstrate high catalytic activity in D-glucose oxidation to D-gluconic acid at pH 5-7.5 and temperature of 30-50?C with the best activities of 95% and 94% for SiO2-Fe3O4-GOx and Fe3O4-SiO2-GOx, respectively. A comparison o...

The energy system is an area which requires a large enough attention in the process of automation and the use of all the possibilities of producer of energy from renewable sources. It is not enough to produce energy but also to collect and trade to the true value, without being used intermediate bodies for recouping. Drop is a technology that allows users to collect data, information from one or more establishments located remotely and send instructions with limited control by them. The article presents a study wh...

Plant biodiversity is important in economic terms in Romania, as well as for the ecosystem aspect maintaining and giving spiritual value and comfort. As a result, the article aims to focus attention on the appreciation of plant species in the center of an inexhaustible source of renewable energy. Agricultural holdings in Romania mainly cultivate cereals, some with records in production (for example maize production in 2018). Cereals are well known for their food potential and animal feed. At the same time, after h...

In this work hydroxyapatite (HAP) nanoparticles ranging in size from 30 to 150 nm of lamellar and rod-shaped form were obtained by controlled deposition in the presence of a stabilizer. HAP nanoparticle powder in different mass ratios was added to a mixture of biocompatible polymers (sodium alginate and PLGA), which were the dispersion medium of the emulsion. Water or an aqueous solution of sodium citrate was used as the dispersed phase. The internal structure of the matrices was studied by scanning electron micro...

Rapeseed crop is an economical competitive crop which could have a good yield and a good profit to farmers. Due to its biological particularities the rapeseed crop is at the same time the highest risky crop in Europe, especially due to lower percent of emerged plants after sowing or due to lower hardiness during winter. To increase rapeseed resistance to drought and pests attack, during germination, there is a huge need to develop and use a new products based on Gibberellic Acids (GA3) and amino acids for seed tre...

Local or regional forest loss may be considered a forest management problem that mainly affects countries that lack proper forest monitoring and law enforcement procedures. Romania is an appropriate example regarding this matter, the main issue being the massive illegal cuts that are difficult to monitor, record and sanction. Therefore, the desiderata of precluding this outlawed practice and of preserving the forest cover ? which accounts for almost 29% of Romania?s territory (2015), are not attainable without rev...

The aim of the present study is to evaluate the possibilities of historic urban parks as places of attractiveness. The historical urban parks are nowadays important not only because of their historical heritage, they are also ecosystems that have economic and social value for the community. Historical and cultural developments change these parks, creating their new environments, as the main requirement for their historical development. The formation of cultural elements and landscapes are reflecting the historical...

This paper presents the results of a study of the mineral composition of rocks on the example of one of the high viscosity oil deposits. Studies were performed using X-ray diffraction analysis. Samples of both the reservoir itself, represented by bituminous sandstone, and samples of overburden and underlying formations composed of clays and limestones were studied. Samples were taken from several wells, which makes it possible to judge the variability of the mineral composition along strike. The content of clay mi...