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In the paper, it is proposed to perform a comparative analysis of the strength and stability calculations for the VST-20000 stationary roof by using two methods. The first method would be the one of structural mechanics described in [1, 2], and the second one is a numerical method performed in the ANSYS software complex. The finite element model of the VST-20000 roof was used to calculate the stationary roof of the tank in ANSYS, which implements the finite element method. The tank computer model represents the sy...

EOR thermal processes involve both introducing of warm fluids in oil reservoirs through injection wells and also extraction of warm/cool fluids through production wells. A model that describes the process for heat transfer from the fluids flowing through the well at its contiguous environment, and the calculation of the temperature along the well can be used in various applications of heat transfer aspects, especially when the bottomhole equipment of the well doesnпїЅt allow measurement. This paper presents a mode...

This study presents functional and nutritional properties of the tomatoes (Solanum lycopersicum L), an ideal source for health promoting compounds. In this paper eleven cultivars of tomatoes were studied that were grown in greenhouses in Oltenia (Romania), which were differentiated between them by shape, size and colour of the fruit. For biochemical determinations, fruit samples were collected at physiological maturity. It was determined the content in soluble dry matter, total dry matter, vitamin C, content in ma...

This work is devoted to the synthesis and study of catalytic properties of mono- (Pd, Au) and bimetallic (Au-Pd) polymer-based catalysts of alkynol hydrogenation. Selective hydrogenation of alkynol C5 (2-methyl-3-butyn-2-ol) was studied over Pd, Au and Au-Pd catalysts supported on hypercrosslinked polystyrene of MN100 type bearing amino-groups. Synthesized Au/MN100 catalyst was shown to be promising for triple bond hydrogenation: more than 96% selectivity with respect to 2-methyl-3-buten-2-ol at 95% of the substra...

The flysch Carpathians presents geological medium that is especially difficult for deep recognizing with use of geophysical methods. Complex geological structure of folded orogeny and connected with it distribution of physical parameters generate ambiguous and frequently unreadable seismic image. In such circumstances looking for independent support for geological interpretation of seismic sections is purposeful, for example using magnetotelluric data. Magnetotelluric measurements were carried out along the select...

Well logging is usually used for monitoring the technical condition of the wells. This means whether there is degradation of the casing (potential subsurface damage of well) or not and uncontrolled overflow behind casingпїЅs strings. Measurement is able to cover both the static state of change saturation and the dynamic process of the ongoing spill in the relevant horizon. Furthermore, if there are monitored overlying horizons because of gradual overflow and saturation of the storage gas caused untightness of well...

In terms of development of agriculture, industry and tourism, in the spatial planning the level of exploration of mineral resources and environmental protection in rural areas is of great importance. The area of Vranje tertiary basin, located in the western part of the Serbian-Macedonian massif was selected. It spreads on both sides of the South Morava river, from Vladicin Han at the North, via Vranje and Ristovac to Bujanovac at the South. The total length of the basin is about 30 km and the width varies from 10 ...

The depletion of light hydrocarbon resources and increasing the amount of heavy oil reservoirs drive petroleum companies to produce high viscous oil by unconventional methods, particularly thermal methods. Presently increasing the efficiency of thermal applications is a vital task. This paper discusses the influences of catalytic (introduction of catalytic precursors and H donor with amount of 1 wt% on oil) and non-catalytic aquathermolysis to the group composition and properties of extra-heavy oil from пїЅAshalch...

Sulphate is the specific anion present in the acid rock drainage (ARD). Although sulphate is considered benign or with low toxicity, some countries have set limits for the wastewater discharged to natural receivers, often 500 mg/L or 600 mg/L. By conventional treatment of the ARD with calcium hydroxide, some gypsum can precipitate, depending on the ARD initial sulphate content, but the conformity for sulphate will not be achieved, because the concentration correlated to gypsum solubility exceeds the limit value by...

The relationship with pet has been for many years in the attention of researchers, with studies which approached the relationship under very different aspects. Researches has focused on the multiple benefits of different stages of individual development (from kindergarten to elders), on gender influences over many related issues (animal attachment, involvement in animal welfare activities), on the therapeutic aspects (positive influences on cancer patients, depression, etc.) and, last but not least, the positive c...

A leading cause for offshore decommissioning is connected with assessment of increasing level of risk due to progressive structural damage and danger potential, in both structural and technological collapse, taking into account the environmental conditions and operational loads for which structure undergoes. The purpose of this paper is to express the vulnerability due to fatigue phenomenon of structural elements - studied on a model corresponding to self lifting Romanian offshore platform "Gloria" - as annual yie...

In installations in which flammable substances are processed, transferred or stored, explosive atmospheres generated by flammable gasses, vapors and mists or combustible dusts can occur. The assessment of these installations and equipment within is very important in order to verify the implementation of measures that lead to minimizing the risk of ignition of explosive atmospheres and occurrence of an explosion. In Romania, technical installations that operate in environments with hazard of explosive atmospheres m...

In Europe, the knowledge and measures regarding self-protection in case of emergency is very poor in general. Within the population, young people aged 7 пїЅ 12 require a special approach, as their knowledge and behavior is different from adults. Their perception of accidents and disasters needs to be educated through an efficient teaching program. Therefore, a first step in developing such a tailored education program is to assess the natural hazards in European countries, with a special focus on the hazards that ...

PutnaпїЅVrancea Natural Park (38,204 ha) is located in the eastern part of Romania, the upper part of Putna River Basin (Curvature Carpathians). It includes valuable complex forest ecosystems, mountain meadows, also known for the large variety of flora and fauna. Over the past almost thirty years, the study area was subject to diverse natural and man-made environmental stressors which had significantly influenced land use/cover changes with a particular impact on forest-covered areas. The current paper is seeking ...

First results about crustal models were obtained from various geophysical and seismological methods applied in Romania in the last part of XX century. A thorough interpretation of these data lead to the first partial models of crustal structure in the western part of Romania. In the first years after 2000 two regional seismic refraction lines were performed within a close cooperation with German partners from University of Karlsruhe. One of these lines is Vrancea 2001, with 420 km in length, almost half of the eve...

One of the main objectives of EU energy policy is to increase the share energy from renewable sources to 20% by 2020, in view of increasing this share in the coming years. Sustainable and perspective source in diversification of share and its increasing are targeted grown energy crops. In Slovak regions, the share of the renewable sources in the gross final energy consumption is only 11.6%. Potential for growing energy crops is in all Slovak regions. In terms of soil factor is the possibility of growing on an area...

Assessments conducted by the various failures analytical groups shows that failures of cylinder liners, piston rings and pistons all related to combustion chambers share the highest proportion every year in Marine Main Engines failure statistics by component part, conversely, excessive wear of cylinder liners and piston rings of Main Engines and problems associated with scuffing have frequently occurred. To solve these problems, it is necessary to conduct analytical assessments on a variety of data such as actual ...

In system of sustainable and safe development of regions one of the major tasks is scientific justification of a control system of health of the population at the expense of risk assessment to health of the population from negative impact of factors of the environment. One of the leading factors of anthropogenous impact on health is aerogenic. The paper studies public health risk assessment from the chemicals emitted city's largest enterprises. The analysis is performed on the basis of the qualitative and quantita...

Background: The aim of this study was to analyse the serum biochemistry of value intervals for the most commonly used energetic biochemical variables of European mouflon from a game reserve in the eastern part of Slovakia. From biochemical variables, glucose (GLUC), cholesterol (CHOL), high-density lipoprotein (HDL), low-density lipoprotein (LDL) and triglycerides (TRIGL) were analysed. The obtained values may be of use for the health assessment of Moulton in further studies. Methods: During the research between 2...

Gas flow through porous media is a physical phenomenon commonly occurring in natural environment and in many industrial applications. This phenomenon is most often connect with filtration process and migration of gases through different porous structures, mainly rock media. In these medium there occur free spaces of different shapes, in which flow of gas is possible. These spaces create pores (for which longitudinal dimension and transverse dimensions are similar) and gaps (for which transverse dimension is consid...

Flow of gases through the porous media is a phenomenon commonly occurring in nature and in industrial processes. Very often these flows take place in rock media. Most often these media occur in a form of porous rock massifs (used in exploitation of crude oil and natural gas), broken roof rock blocks (forming the goaf with cacing in hard coal mines) and post-mining waste dumps (mining dumps). In each of these porous media there occur free, often empty spaces of different shapes and dimensions. These spaces, dependi...

During operation of underground gas storage there is the possibility of a gas leak under certain circumstances. It can be caused by leakage of gas from underground gas storage due to the untightness of injection/withdrawal or observation wells. This leakage of gas can be happened in the case carrying out cementation of casing string in low quality. Presented article focuses on the control of wellпїЅs tightness using pressure measurements on annular casing. The aim of pressureпїЅs measurement on casing strings is t...

Labour protection involves the safety and health of employed individuals. It has to be one of the priorities for any employer, as employees are a resource to be cared about and made satisfied. In Latvia, regardless of the requirements of law, the State Labour Inspectorate revealed 10 815 violations of the labour protection legislation in 2014. Besides, in the period 2010-2014, the number of accidents at work annually increased, reaching 1763 in 2014, of which 213 accidents led to serious health disorders, while 41...

This paper presents an assessment of power generation losses of a hydropower plant (HPP) due to an imposed reservoir management plan and comparisons in terms of monetary value with the existing management plan but with an eutrophic reservoir. The study case is represented by Gole?ti reservoir, which is a shallow reservoir in Romania, and the associated HPP. Gole?ti reservoir is an artificial lake of medium size, which has a 55пїЅ106 m3 volume and a maximum depth of 32 m. Its use is complex: it allows flood control...

The Moravian Karst, situated in the eastern part of the Czech Republic, is the most extensive and most developed karst area in the Bohemian Massif. To protect its unique environment, the Moravian Karst was declared a Protected Landscape Area in 1956. Despite the protection, pollution occurs in some disappearing streams both on the earthпїЅs surface and underground, in caves formed by karst processes. The aim of the study was to assess the hydrochemical status of several selected streams and identify the sources of...

In the article provided assessment of water supply sufficiency of agricultural lands of South Kazakhstan which is the region of pasturable livestock farming and irrigated crop farming. The regional specific of irrigation of pasturable land and arable land is described, the sources of water supply are determined and their technical condition is estimated, the territories where irrigation of agricultural lands assessed as critical are detected. The solution of such tasks will allow to work out scientifically justifi...

The areas of gold mining in Kemerovo region in Russia are highly transformed by technogenic processes connected both with the ore extraction and processing (dressing). In Kemerovo region there are two former gold mining areas characterizing by strongly altered landscape and pollution by toxic chemical elements. There are two types of waste storage in these territories пїЅ waste dumps and tailings. The waste storage sites have definite impact on the surrounding environment leading to the changes in geochemical feat...

In central and western Poland in the rural areas there is a lot of lignite deposits, which utilization by building mining and power complexes could give impetus to development. The paper attempts to evaluate the impact of their construction by comparing socio-economic development indicators and quality of life conditions of residents in two regions. In the area of Belchatow, in which operates the largest lignite mine and the lignite fired power plant (commune Kleszczow) and commune around deposit Gubin-Brody with ...

The problem of recreational use of forest areas in modern conditions has gained special relevance. This is due to the following reasons: increase in neuro-psychological stress, number of stressful situations and the desire of the people to remove these loads, i.e. to improve their psycho-physiological state in a forest; development of the road network and means of transport; a variety of landscapes and a wide range of recreational opportunities (recreation, collecting of mushrooms, berries, balneological effect of...

Bucharest-Ilfov Development Region is located in the central part of the Romanian Plain and includes the Bucharest municipality (the capital of Romania) and Ilfov County. Man-made hazards can involve casualties and environmental pollution, also being recognized for the generated social, environmental and economic impacts. The current study entails the regional assessment of multiple man-made hazards (sometimes referred to as technological hazards) in one of the most developed Development Regions in Romania, i.e. B...

In all countries, many practical observation and theoretical studies are devoted on the soil and water erosion. However, there are still significant shortcoming in theoretical and experimental parts due to the underestimation of its physical causes and excessive enthusiasm of "empirical formulas", which is not often taken into account the elementary physical conditions in erosion processes, so the responses are not very accurate. There is also other useful model which is called GIS; the model is very powerful to e...

The main and typical changes in the natural complexes of tundra and forest-tundra in the areas of development of oil and gas fields were considered. Assessment of the stages of transformation of plant communities and soil cover due to anthropogenic load has been characterized. With the development of gas and oil fields in the north, pollution leads to a significant transformation and degradation of natural complexes. However, these violations are insignificant in area and localized. Various mechanical disturbances...

The Vrancea seismogenic zone is real menace not only for Romania but also for the neighbouring countries. Vrancea earthquakes cause casualties mainly in northern Bulgaria. Vrancea source is rather active one пїЅ more than 10 quakes with magnitude 5.1 < Mw < 7.0 (depth of hypocenters of 40 to 154 km) occurred during the last 30-ty years. In the last decade the Vrancea quakesпїЅ impact on our territory have been thoroughly recorded by the digital stations of the National Strong Ground Motion (SGM) Network of Bulgari...

A great problem of maintenance of highways in the Northern territories пїЅ environmental pollution of anti-icing materials. Chemical compounds as a part of the anti-icing materials can also have a negative impact on metal and concrete structures of facilities along the roads. Method of sampling of water and snow along the roads is presented in the article. The results of the chemical research of the degree of water pollution in the canals of highways witch operated in the city of Arkhangelsk and the Arkhangelsk re...

The article presents the fossil fuels combustion effects in terms of the dangers of increasing CO2 concentration in the atmosphere. Based on the bibliography review the negative impact of increased carbon dioxide concentration on the human population is shown in the area of the external environment, particularly in terms of the air pollution and especially the impact on human health. The paper presents biomass as the renewable energy alternative source to fossil fuels. Biomass can be an essential alternative to fo...

The dominating feedstock for biodiesel production is still a vegetable oil and cost of the oil composes 80-85% of the production costs, therefore the development of the more efficient methods for biofuel production from vegetable oil remains crucial. The transesterification of oil proceeds with the production of side product: glycerol, which cannot be a part of the composition of fuel. Chemical interesterification of oil with alkyl acetate produce a mixture of fatty acid esters and triacetin. Triacetin is a fuel b...

Westphalian A marine horizon Dunbarella is especially important for correlation of Carboniferous in the Lublin Coal Basin (LCB), and in the other basins of the Northwest European Carboniferous Basin (NWECB). Within the horizon Dunbarella an abundant fauna, mainly Mollusca (predominantly bivalves, goniatites, gastropods) and Brachiopoda, were identified. The distribution of fauna in the analysed horizon within the investigated boreholes, fluctuates in terms of both abundance and taxonomy, and cyclic sedimentation t...

Different operations, such as fleshing, trimmings, cuttings and chips from hides, causes leather industry in being one of the most environmental пїЅunfriendlyпїЅ sectors. Moreover, the treatment of sewage waters brings up also the problem of mud which is related with the appearance of biodegradation process of organic waste, followed by the emission of greenhouse gases, especially methane and nitrous oxide. All these wastes also imply a terrible smell and a strong land contamination. The large quantity of wastes, ...

The work represents the data of the research of the chemical composition of epiphytic lichens Evernia mesomorpha (L.), growing around the tailings of a former gold-polymetallic deposit (Kemerovo region. Western Siberia, Russia). The lichen samples were collected from trees according to a radial net (20 samples in total). The concentrations of chemical elements in the dry lichen matter were determined by the mass spectrometry with inductively coupled plasma. The results obtained were compared with the concentration...

In EU countries, it is currently enacted to separate all recyclable and compostable elements of municipal waste. The products of composting biodegradable fractions of municipal waste are finally used in agriculture and horticulture depending on their quality and maturity. When disposing biodegradable municipal waste (hereinafter BDMW), it is always necessary to keep in view that its decomposition is assisted by a wide scale of various organisms out of which some may be a reason of occurrence of serious biological ...

U(VI) biosorption by six natural materials: three types of peats, Polytrichium moss, EichhпїЅrnia crпїЅssipes water plant and Cladonia stellaris lichen was investigated. Natural sorbents were selected, as it is available, cheap and accessible materials. The effects of initial concentration of UO2 2- in the model radioactive solution and pH on the sorption uranyl ions were assessed. Adsorption isotherms and constants for given adsorbates and adsorbents were determined. Equilibrium is well described by Freundlich eq...

This paper presents the results of micropaleontological research of foraminiferal fauna and calcareous nannofossils research of the Upper-Eocene sediments in the Delchevo and Strumica basins on the territory of the Serbian-Macedonian massif in the Republic of Macedonia, which are very important in solving the stratigraphy of the sediments. The studied micropalaeontological material was obtained from 31 samples coming from the upper flysh unit of 2 outcrop sections belonging to sedimentary basins: Delchevo and Stru...

Work purpose пїЅ study of the feasibility of using biotesting methods for screening ecologically safe components of drilling solutions, to control the technology of neutralizing drilling sludges in the case of sumpless drilling. To achieve the purpose, biotesting methods based on the survival of daphnia, infusoria, quenching of luminescence of luminous bacteria, immobilization of algae was used. For reduction in cost of technology of drilling studied a possibility of replacement of medicines of chloride sodium by ...

In order to exclude the unprofitability of heavy oil deposits development in Russia and abroad, it is necessary to search and create new more advanced technologies for heavy oil and bitumen deposits development aimed at improving and creating technologies for increasing oil recovery, which allow developing fields with the greatest economic efficiency. This is due to both the structure of "unconventional" oil reserves and the need for more complete production of hydrocarbon reserves with sufficient high production ...

Accordingly to decision of International Commission on Stratigraphy in 2011 Quaternary period was increased till 2,6 million years. As a result of lowering Quaternary boundary the upper part of regional Akchagylian stage (Gelasian stage) was included into Quaternary as bottom subdivision. Thus upper boundary of Akchagylian stage пїЅ boundary between Neogene and Quaternary, upper boundary of Akchagylian stage located between Upper and Lower Pliocene. Currently Sokol layers within Middle Volga area conventionally in...

The article deals with of a hydrogen pressure vessel suitable for high pressure of approximately 75 MPa. One of the goals is to design a vessel from materials whose strength will meet mechanical requirements a calculated in both analytical and numerical ways. Another objective is the simulation of the design the pressure vessel with regard to safety and weight requirements.

The paper presents a method for calculating the amount of thermal energy which is required for heating buildings, by enlarged indicators: area, storeys, material of walls, the number of people in the building and the specifics of its operation. On the basis of analysis of results of energy audit conducted in 2012-2016 for municipal institutions in the Belgorod region, a statistical analysis was carried out and dependencies were obtained to determine the geometric characteristics of buildings needed for thermal eng...

Acid mine drainage waters around the Buchim Mine were challenge for researchers and Buchim company itself, but of highest interest it was for the environmentalists. In several phases Buchim Mine was solving the problem of pollution around the mine, whhen definitely this environmental problem was solved with the construction of the copper leaching facility. Large quantity of material deposited at the Buchim Mine waste dump of around 130 Mt today represents source of drainage copper solutions that are captured by pi...

In the presented work, we analyzed and summarized the results of studies that reflect the provisions on the impact of inventory indices of forest stands on the dynamics of the formation of phytomass and carbon sequestration. Taking into account the relatively low percentage of forest land and a significant level of aerial technogenic impact of mining complex and related infrastructure the ecological significance and relevance of the study is determined. Ecological potential of forests is estimated by effectiveness...

Oil spills are the main cause of pollution with crude oil. Contamination with crude oil affects the environment (soil underground and surfaces, groundwater and water surface, air quality), plants, and health of animals and humans. Soil pollution with crude oil implies contamination with Polychlorinated Biphenyls, Polycyclic Aromatic Hydrocarbons, Monocyclic Aromatic Hydrocarbons and different heavy metals. The contaminated soil investigated in the framework of the present work was collected from a bioremediation p...