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The antibiotic resistance is a well-researched and of great interest subject for both veterinary and human medicine, not only due to the impact on human and animal health, but also for the effects that are triggered in the long run that are hard to specify at this moment. It is unanimously recognized the fact that the emergence of antimicrobial resistance phenomenon reduces the possibility of a large scale use of bacterial etiology diseases preventing and controlling means In the study was aimed both the isolation...

Eggshells are one of the widely used by-products in the food processing and manufacturing industries. Due to the increased content of minerals, especially calcium and magnesium and less trace elements (iron, zinc, manganese, copper), chicken eggshell waste can be used in many agricultural activities as a mineral fertilizer, as an additive for improving the physical parameters of the soil, or reducing the accessibility of lead and cadmium from soils polluted with heavy metals, as a substitute for natural calcium ca...

This article considers various approaches to developing taxonomies of green projects and focusing on common requirements of countries and regions. The article also analyses the standards of the International Organization for Standardization and evaluates options for applying its key principles, while developing support instruments to catalyse green projects in resource-rich countries, such as BRICS. The research proposes a scientific rationale for systematising incomplete and controversial approaches to evaluation...

In the production process of cast iron and steel castings, a large amount of waste is generated. Each stage of production of castings generates a certain type or types of waste. The largest volume of waste is the used molding compound, followed by slags from melting processes and dust, the creation of which is copied by the entire foundry process. Dust waste is generated from the beginning to the end of the production cycle in the foundry. Finishing operations represent, in addition to a large source of noise, a l...

Working in stone quarrying and stone processing poses certain risks that must not be underestimated. The safety of workers must be paramount, where work-related injuries can occur, so the use of appropriate personal protective equipment is important, but the less visible risks, such as inhalation of granite stone dust, which can penetrate the respiratory tract, lungs and lung chambers, causing silicosis, chronic obstructive pulmonary disease, kidney disease or lung cancer, must not be underestimated. Chemically, g...

Multiple crises in recent years, including the health crisis caused by the COVID-19 pandemic, the global energy crisis, the climate crisis, the decarbonization of the energy mix, the European Green Pact, the energy transition, the conflict in Ukraine, and the energy trilemma, have created the conditions for a new energy revolution. If the listed influencing factors, the sanctions imposed on Russian oil and gas as well as the confrontation with the components of the trilemma, energy security, minimal impact on the ...

The new tendency of consumers and processors in the food industry is to use organic products. Because intensive crops involve the use of pesticides and fertilizers, a bio alternative to tomatoes can be the rosehip from spontaneous flora. In this study, four variants (control, sweet, spicy and hot) of rosehip chutney were prepared as an alternative for tomato ketchup. The sensory characteristics were evaluated (by hedonic scale). The vitamin C content (by titrimetric iodometric method), polyphenols content (by Foli...

Security planning and disaster management are critical areas of focus in Bulgaria, given the country's vulnerability to various natural and man-made disasters, including earthquakes. Bulgaria has established an emergency management system for disaster preparedness, response, and recovery. This system includes various government agencies, non-governmental organizations, and volunteers who work together to ensure an effective response to disasters. The Bulgarian government and the science community conduct risk asse...

This paper focuses on the experimental testing of hydrated lime-, natural hydraulic lime-, and lime-cement-based mortars with improved salt accumulation capacity. Moreover, the effect of varying content of non-hydrophobised expanded perlite (EP) in the mortars on their durability was investigated. The substation of silica sand by expanded perlite was 25%, 50%, 75% and 100% by volume. A modified method based on the adsorption of free salt ions from solution was used to measure the chloride binding isotherms. The sa...

The purpose of the study is to substantiate the theoretical foundations of the creation and functioning of science parks. The theoretical foundations of the creation and functioning of science parks as innovative elements of the modern educational space are presented. The scheme of the territorial distribution of science parks in Ukraine was analyzed and systematized, their main functions were highlighted, and the peculiarities of the organization of science parks were revealed. The creation of the first science p...

Advancements in remote sensing technology have provided excellent opportunities for mapping the seabed and substrates. Pomorie and Nessebar are ideal for combining single-beam sonar, multi-beam sounding, and drone imaging to map seabed forms and substrates. This paper presents the final stage of the "Multidisciplinary study of Burgas Bay - MidBay" Project. The project aims to create a substrate map and identify different seabed forms. Recent systematic studies have shown that the seabed, beach, and shallowest part...

The Danube Delta is a wetland of global importance, providing several ecosystem services. The sustainable development (i.e., economic, social and environmental) in the area depends on the health, quality and quantity of the natural resources. Water is one of the most important resources. Largely, the Danube Delta, which receives the input of water and sediment flux from the Danube River, gathered form its entire basin, may experiences lower water quality due to natural and anthropogenic factors, from basin to loca...

This paper presents an electro-acoustic instrument, used in geophysical (seismic) prospecting, for the reception of sound waves, namely the geophone. The geophone is a transducer which transforms the displacement of the soil particles into electrical signals. The article aims at presenting the functioning of a standard electromagnetic geophone and of the newer geophone models, built using the MEMS (micro-electro mechanical systems) technology. Below, a scheme for amplifying the original signal generated by a SM-24...

In this article, we will present the types of seismic waves, how their collection is performed and their preparation for analysis and processing. Understanding these aspects can help improve in future any stage of the process, by using new hardware and/or software equipment, in continuous development around the world. There are three steps in seismic exploration of the ground. The first one is seismic data acquisition which is done in a specific location, ground or water, using a seismic source. The seismic wave g...

The use of microalgae as carbon sequestrators requires optimization of the cultivation process. Growth curves for three types of microalgae were plotted. The growth was carried out at different temperatures 30 and 35 ? and with initially different concentrations of inoculum 30 and 3% in order to assess the possibility of growing crops at the lowest cost and with a high yield of a useful product. We used 3 strains of microalgae - potential sequestrators. The introduction of the inoculum at a dose of 30% led to an a...

The paper contains the results of experimental research on the elaboration of the composition and optimization of the properties of the self-levelling screed based on cement and sand, intended for the fulfilment of the intermediate layer of floors, including industrial enterprises with the aggressive environment; sedentary parts of tanks, basins; bunkers; different containers, etc. The reinforced self-levelling screed has an absolutely horizontal surface. It allows the application of finished layers of composite p...

High-Entropy Alloys (HEAs) have higher mixing entropy than the conventional alloys and intermetallic compounds and form the stabile solid solutions with disordered structure. They exhibit unique and special properties, in particular high hardness, wearresistance, significantly high strength, structural stability, good corrosion, and oxidation-resistance. HEAs -exotic-, core effects are followings: high configurational entropy; sluggish diffusion; lattice distortion and cocktail effect. At the current stage, the vo...

Sulfonamides are appropriate ligands for the preparation of coordination compounds with biological activity, as they possess bactericidal, antiviral, antidiabetic, and diuretic properties and some sulfonamide compounds are under clinical evaluation for cancer treatment. Metal complexes provide highly versatile platforms for drug design. Considering the biological potential of the quinoline nucleus, but also of the sulfonamide scaffold (especially antimicrobial), as well as that of the quinoline- sulfonamide combin...

The study of the effect of blasting on bench stability is indispensable for the overall mine-s safety, in this perspective, we conducted a study in the limestone quarry, which is characterized by a highly fractured rock mass. While the quarry presents a steep topographic profile, the extraction is carried out on a single operating edge. The blasting operations in the quarry offer an unsatisfying fragmentation (high percentage of oversized boulders), important overbreak, and deformation to the bench-s face; these i...

In recent decades, small domestic wastewater treatment plants have become popular in rural areas of the Slovak Republic. The reason for the expansion of decentralized wastewater management is that many rural areas have scattered settlements, and a centralized wastewater disposal system is economically, technically demanding, and inefficient. The disadvantage of using small domestic treatment plants in terms of environmental protection is that these facilities have yet to be significantly monitored. Due to improper...

In the context of the global environmental crisis the development of new pedagogical models and teaching methods at the universities of Ukraine is aimed at the formation of socio-psychological competencies of future specialists as subjects of the implementation of the concept of sustainable development. The article presents the results of eco-psychological research of the level of formation of ecological thinking among engineering students. More than 300 students from three universities of Dnipro and Poltava have ...

Power grids have been the mainstay of power systems for more than a century, supporting economic activity by bringing power to homes, industry and services. As the transition to green energy advances, the role of electricity will become more important, making power grids even more special to society and economies. The energy sector is going through essential changes such as decarbonization, digitalization, climate change etc. and as a solution, governments, industries and other stakeholders will need to establish ...

Knowledge of the coastal hydrodynamics, in particular the storm induced waves, is essential for management of the extremely vulnerable coastal environment. There, wave processes dominate surge, coastal currents, sediment transport and species distribution. Therefore, it is important to have a detailed insight into the exposure of different coastal areas to wave action. The study proposes a wave exposure classification of the Bulgarian Black Sea coast according to wave climate conditions as required by the Water Fr...

Water resource of a given river basin is the main component of the ecosystem and water resources management system as well. Ecological flows are considered within the context of the Water Framework Directive (WFD) as -a hydrological regime consistent with the achievement of the environmental objectives of the WFD in natural surface water bodies as mentioned in Article 4(1). The so-called Heavily Modified Water Bodies (HMWB) or -regulated rivers- have modified flow, which is influenced by reservoir compensation rel...

Georgia is a mountain country, located in the Caucasus region, where carbonate rocks are frequent and geographically well-distributed across the country. The aim of this paper is to introduce the main results of speleo-geomorphological and geophysical investigation conducted in the southern part of the Askhi Limestone Massif (namely Turchu Limestone Polje). Based on the complex studies, karst forms such as sinkholes and ponors were identified, the width of the Quaternary deposits located on the limestones was dete...

The stability analysis of underground excavations is a crucial part of the design of underground excavations. One of the most common collapse hazards derives from rock mass cracking which creates potential wedge blocks falling or sliding into the tunnel. Many researchers have addressed this subject and are trying to resolve this critical issue for the safety of underground tunnels. The most extensive research involves implementing finite or discrete element numerical algorithms to analyze wedges. However, this ana...

Along with the enlarging of post-mining towns, the use of abandoned mining areas for various purposes is gradually being approached. This raises the question of the safety of the closed shafts. The following article discusses the determination of attributes which can help to reveal stability problems of disused mine shafts with the increasing of mine water level in Ostrava Basin. The first part is devoted to the need to obtain the most relevant documents about each of the shafts. These documents include data from ...

In the case of road routes in natural and urban environments, a problem arises with a weak foundation at the boundaries of the easement of the facilities. The weak foundation is in the form of landslides, unstable varieties and ravines on which an embankment is built. In an urban environment, the weak base usually covers a much wider area than the easement of the roadways and streets to be strengthened. In order to avoid stabilization of the entire affected city infrastructure and to limit the strengthening activi...

The study is focused on statistical analysis of river discharges. The registered river flow regime and hydrological characteristics of Yantra River are investigated. Yantra watershed is situated in North Bulgaria and belongs to Danube river basin Directorate. The current study is focused on the low flows. Thirteen hydrometrics stations located in the watershed are available for the investigation. Data used are from monitoring network of the National institute of meteorology and hydrology, Bulgaria. The flow durati...

For the most risky sections in the metro construction, the postulates of the mining methods using steel structures have to be used. With the classic settings of these methods, innovative technical solutions can be achieved, to which this report is dedicated. It is necessary to search for simplified, safe and durable tunnels and shafts when crossing existing subway lines. On this basis, the statements of the specific geomechanical tasks were formulated. In the case of shafts, the fundamental differences in the appl...

The Discrete Element Method (DEM) serves as a crucial computational tool in studying ice-structure interactions pertinent to offshore marine constructions. The article highlights the significance of DEM in simulating and comprehending the complex dynamics of ice loads on offshore structures. Offshore marine constructions face challenges associated with ice loads, especially in regions prone to icy conditions. DEM, adapted to model ice behavior, offers a micro-scale perspective, representing individual ice particle...

The litterfall (fallen leaves, flowers, fruits and twigs) in the forests represents part of dead plant mass. The quantity and quality of litterfall in forests plays an important role in their state. Through it, a large part of chemical elements is returned to the cycle of the ecosystem, it is an essential carbon depot, it affects regeneration, soil moisture, fertility, composition, fauna and flora. The study presents data on stocks of chemical elements in annual literfall of Western Stara planina. The sample plots...

Today's time is characterized by a high degree of globalization and trade borders are both physically and commercially open, and a competitive organization must also take into account factors that were less important in the past. Any company that operates in a market environment is influenced by this environment and to some extent helps to cocreate this environment. The current time in connection with the COVID-19 pandemic and the war conflict in Ukraine represents a difficult test for all business entities. In th...

Strategic management and management in general as well as the form of behavioral management of post-mining landscapes is a very important question of how to meaningfully use brownfields that will arise after the end of fossil fuel extraction. The authors of the presented article focused on these revitalization areas in the form of project management from the perspective of strategies for suitable locations. These localities are very important for the further development of the area, and related to this are the pos...

The fourth industrial revolution is currently underway in the global economy. It affects any company, including those applying green technologies whose main purpose is to reduce climate change, the loss of biodiversity and pollution when performing economic activity. Strategic management of the processes is essential for companies to achieve their main goal in parallel with the efficient use of resources when transitioning to a circular economy. Strategic management improves the company-s ability to solve both env...

Statistical data, as well as public reports and comments from industry experts, show that the transition of local governments to the digitisation of internal processes has several challenges, mainly related to ensuring sustainability, reducing the impact on the environment, data security, and technical maintenance [2,3]. Therefore, it is essential to assess the situation in local governments and choose the most appropriate support system for Latvia's situation, which would not only be financial support. In public ...

One of the main lines of research on the impact of climate change is the study of drought and its effects on agricultural production. The aim of this study is to determine the key parameter of plant expression in relation to water stress and soil hydrophysical properties, thereby more accurately determining the need for real-time soil profile water enhancement. The research was conducted from 2019 to 2021 at the Nove Zamky experimental site, with research on royal walnut (Juglans regia L.) During the study, we clo...

In order to reduce the brain drain (outflow of intellectual capital) from the regions and promote a more even population distribution, entrepreneurship development in the regions, and subsequently ensure sustainable development of regions, it is necessary to create and implement business development strategies in the regions and, first of all, to ensure that university graduates stay to live and work in the region. The aim of the research is to find the answer to the question of how to retain graduates in the regi...

In the exploration and mining industry, fixed and mobile machines use hydraulic drive systems (HDSs) involving hydraulic cylinders powered at high pressure rates. Such cylinders operate in heavy and high-magnitude dynamic load regimes, e.g., as part of mobile crusher buckets, excavators and mini excavators, hook-lift trailers, or mobile hydraulic jacks. In this context, there are two solutions for generating high pressure rates in HDSs: (1) by using high-pressure pumps, or (2) by using hydraulic power units consis...

An intense seismic activity started in February 2023, close to Targu Jiu city, in the Oltenia region (Romania). The strongest events occurred on 13th and 14th February, the first shock with ML=5.2, and respectively the second shock with ML=5.7. These main shocks were followed by specific seismicity bursts (about 2000 foreshocks were registered). The focal depth of the events ranges from 1 to 20 km, most of them being situated in the 10-20 km depth interval. The area of interest is tectonically complex with various...

The purpose of this paper is to study the effects and risks of climate change in Romania. The research methodology used is based on the analysis and synthesis of information from the climate change literature. The main research method used in the paper is content analysis. The authors of the paper find that climate change is already having many negative consequences on health, environmental and economic issues in Romania, affecting all regions. The importance of publishing this study is to increase and improve the...

The village of Sag has an area of 8,664 ha, of which 8,419 ha is agricultural land. The deterioration of soil quality has negative repercussions on either one or all soil functions. From a geomorphological point of view, the territory of the village is located in the Banat- Crisana Plain, part of the Western Plain of Romania, the eastern extremity of the Tisza Plain, in the Timis-Bega interfluvium, a unit formed exclusively by the cumulative action of the Timis River. The sustainable use of the soil involves measu...

The use of pig slurry as fertilizer has a clear impact on farm-level energy input requirements, being a correct and natural way of its decomposition and also contributing to the reducing of the amount of chemical fertilizers used, which, in addition to the high cost, may leads to the pollution of the areas where they are applied. Swine sludge could provide between 38 and 61% of the nitrogen, phosphorus and potassium in chemical fertilizer. The purpose of the work is to determine the changes that the application of...

This study aims to determine the specific fingerprints of cauliflower and broccoli available on the Romanian market based on mathematical models and chemical analysis (moisture content, minerals content, total antioxidant capacity and total polyphenols content). These vegetables (cauliflower and broccoli) are considered essential for the human diet due to their bioactive content and nutritional value. The content of minerals and antioxidant compounds varies depending on their varieties, environmental conditions, r...

Dioecious Cannabis sativa L. is grown for derived products that are of industrial, food and therapeutic importance. The research aims to highlight the therapeutic potential. The study's main objective is to examine the antibacterial activity of dioecious hemp extracts on two bacterial strains. The plant material comes from 4 varieties of dioecious hemp CS (Cannabis sativa L.): CS1-Armanca, CS2- Lovrin 110, CS 3- Silvana and CS 4- Teodora. The antibacterial property of the plant biological material was tested on tw...

Heavy rainfall in the summer have become more frequent, and when they occur over the coastal region, the cumulative hazardous pressure leads to floods, loss of physical life and socio-economic impact. Such is the disaster due to the floods in Tsarevo at the end of summer 2023. The paper contains a conceptual analysis of hydrological and meteorological conditions, land cover and use, and institutional preparedness to deal with dangerous floods. It is prepared on the basis of the data from Copernicus Land Monitoring...

The purpose of the paper was to assess the rheological properties of some kinds of sausages from the local market. Three different kinds of sausages were chosen: Cabanos (CS), Peasant (PS) and Grill (GS). In order to analyze the viscoelastic characteristics stress relaxation tests were run on the above food at the room temperature. With the "Origin" program, the graphic part was made, obtaining for each three compression curves. From these curves were calculated the compression module (or elasticity module or Youn...

In this research, the study site is a limestone quarry Ain El-Kebira located in the wilaya of Setif (Northwest -Algeria) producing limestone for cement manufacturing. The present work represents a study to measure the granulometric distribution of the blasted rock using the digital image processing software WipFrag and empirical model KuzRam, in order to evaluate the efficiency of the blasting operation and ensure the stability of the benches. In this work, we will simulate the method of exploitation while analyzi...

Suppression of fungal phytopathogens is one of the serious challenges agriculture and forestry since they cause significant biomass and yield losses. One of the alternative methods of suppression phytopathogens is the use of biosurfactants, which are amphiphilic substances produced by many microbes. Bacteria of Pseudomonas genus are known to produce biosurfactants of the rhamnolipid class. These surfactants can possess antimicrobial and fungicidal properties. In this work, we studied the effect of various concentr...

Chemical flooding allows for the improvement of oilfield performance after standard waterflooding processes. Chemical EOR methods modify different properties of fluids and/or rock to mobilize the remaining oil. It is expected that the residual oil will be different in properties than conventional. A new technology is presented to study a surfactant-polymer flooding, based on a periodic sampling and measuring properties of oil and water during 15 months. At each sampling date, 2D reservoir model was built to track ...