Processing Of Raw Materials Research Articles

Influence of mineral raw material processing on the qualitative and quantitative indicators of crushed stone production

Purpose. Explore the impact of raw material processing stages on qualitative and quantitative production indicators and devise technological schemes for processing mineral raw materials to produce crushed stone products. Methodology. The study employs theoretical analysis, information systematization, and generalization of key physical and mechanical properties of rocks suitable for construction materials. We investigate the nuances in utilizing various crushers based on productivity and input material size. Additionally, technological schemes for crushing and sorting plants are visualized using AutoCAD to obtain finished crushed stone products for concrete and asphalt mixtures. Findings. The study revealed that the qualitative and quantitative characteristics of finished products are influenced by various factors, including the granulometric composition of the raw material, type and number of impurities, presence of vises and needle-shaped grains, number of crushing stages, screening requirements at individual stages, and the type of crushing equipment. Efficiency of the complex is contingent upon the optimization and calculations of the technological line for each specific raw material type. Performance indicators of crushing equipment types can be calculated based on productivity. Common typical technological schemes have been identified, adaptable to specific production conditions. Originality. Optimal typical technological schemes for mineral raw material processing have been identified. These schemes are adaptable to variable productivity and quality requirements for finished products, particularly with a three-stage crushing scheme. Practical implications. Proposed technological schemes enable continuous and cost-effective crushing, reducing power supply delays due to clogging of the feeding hole. These schemes also enhance operating conditions for lining, contributing to the prolonged service life of crushers. The application of these schemes is particularly beneficial in the active quarries of Ukraine for the extraction and processing of raw materials to produce crushed stone products.

Mining waste as a base for the formation of technogenic minerals

Purpose. Based on open sources of information, review the current state and storage of waste from mining, primary (concentration) and secondary processing of mineral raw materials. To provide a current system for the existence and transformation of mining waste in relation to the category of promising developments as the basis for the formation and study of the mineralogical and geochemical features of the formation or process of formation of technogenic minerals. Predict the variation in the geological and economic assessment of the massif as a newly created deposit. The methods. The work uses general scientific research methods – empirical and theoretical (analysis, generalization, explanation). Findings. A preliminary review of the existing types of waste from industrial sectors where mining and processing of minerals is carried out is carried out as the basis for modern mineral formation of technogenic (technical) minerals. A general modern structural diagram of the system of mineral raw materials and mining waste is presented. The originality. The potential of the existence of technogenic minerals has been revealed.It is shown that at present, technogenic raw materials are a competitive, promising mineral resource, the use of which using innovative technologies provides not only a significant technical and economic effect, but also, along the way, an environmental effect is achieved as a natural consequence of the new level of requirements of modern production. In addition, this makes it possible to reduce the negative impact on the environment, reduce the area of alienated land for the needs of mining production, and also partly solves the problem of resource conservation. Practical implementation. The result of the review can be used for planning and carrying out further scientific and methodological research of the mineralogical and geochemical characteristics of waste from mining and processing of minerals, supergene processes occurring in technogenic massifs, expanding and deepening mineralogical research in the field of environmental mineralogy in connection with technological.

INNOVATIVE ENVIRONMENTALLY SAFE PROCESSES FOR RECOVERY OF RARE AND RARE-EARTH ELEMENTS FROM COMPLEX ORES OF COMPLEX MATERIAL COMPOSITION

Domestic and world tendencies of involvement in the processing of ores of rare and rare earth metals (REM) are shown. It is shown that the main direction of innovative activity is the development and application of modern breakthrough technologies for the complex processing of mineral raw materials with the production of high-quality products while minimizing environmental damage. The main deposits of rare and rare-earth metals are systematized from the standpoint of the content of the main components, concentrator minerals and the main enrichment methods. The main principal technological schemes of processing of some deposits of RM and REM in Russia (Lovozerskoe, Tomtorskoe, Afrikandskoe deposits) are given. The options for involving technogenic and off-balance raw materials in the processing in order to extract strategic metals are considered. It is substantiated that innovative environmentally friendly processes for the extraction of rare and rare earth metals from complex ores of complex material composition are being actively developed in Russia at present

PECULIARITIES OF DEVELOPMENT OF CITIES IN THE NORTHERN BORDER REGIONS OF AZERBAIJAN AND THE REGULATION OF THEIR DEVELOPMENT

The aim of the article is to investigate the features of the demographic and socio-economic development of cities in the northern border areas of Azerbaijan (Sheki, Zagatala, Gakh, Balaken, Gabala, Oguz, Khachmaz, Husar), to determine the direction of their perspective regulation in accordance with the trends that are taking place. Methods and methodology. The article uses such methods as historical overview, analysis of statistics of different periods, comparative analysis and descriptive method of demonstration of geographical objects. The study deals with taking into account the geostrategic significance of population resettlement in border areas, the importance of ensuring their economic, social and ecological development, regulating population migration processes, creating new jobs and implementing other social programs. The novelty of the article is that the directions of the demographic, socio-economic development of the cities are actually substantiated not only as the main supporting frames of the region, but also in terms of national interests, geopolitical and strategic situation. The article also identified socio-economic, natural-geographic, and other issues. factors affecting the location of cities in the northern border areas. mostly became possible during the years of Soviet power. The study says that cities are the largest economic centers of the country and the main centers of population settlement. The article scientifically analyzes geographical problems in Azerbaijan. Clarified features of Rego. It is concluded that it is clear from the article that scientific analyzes corresponding to geographical changes should be increased, such issues are considered comprehensively and universally in research. Conclusions. The study says that cities are the largest economic centers of the country and the main centers of population settlement. Before the establishment of Soviet power in Azerbaijan, only the cities of Sheki and Zagatala existed on this territory. Although these two settlements have long been formed as cities, they acquired city status only in 1840. And the cities of Balaken, Gakh, Gabala, Husar, Khachmaz, Oguz and other settlements located on the territory of administrative districts were created during the years of Soviet power and acquired the status of cities and towns. In general, the economic and geographical analysis of the development of the cities of the northern border regions allows us to reach the following conclusions and put forward a number of proposals: – in the creation of urban settlements and the formation of their modern system, the leading role was played by the organizational-economic, social-administrative management function that they perform for the surrounding territories; – Another city-forming factor is the food industry, which is represented by small-scale enterprises that mainly rely on the processing of local agricultural raw materials.

Critical and Strategic Minerals in the Russian Federation

Global development and scientific and technological progress are intensifying the use of mineralraw materials (MRMs)—the necessary basis for the production of high-tech products. The advanced producing countries of these products are in dire need of various raw materials, which are critical and, as a rule, are supplied from third countries. Strategic is a mineral raw material, which is of particular importance for ensuring the economic development of the country, its defense and security. Due to the complex structure of extraction, processing and consumption of raw materials, many of its types are in short supply. In the world literature, the concept of “deficient MRMs” in its content most closely corresponds to “critical MRMs,” that is, raw materials that are critically needed for industry and are characterized by a significant risk of their supplies. Most critical raw materials are needed for production promising high-tech industrial products and new materials and, in particular, for “green technologies” in connection with the course of decarbonization of the economy actively pursued by world powers. In the production of such products, the consumption of MRMs is growing rapidly, especially rare-earth elements (REEs), V, Li and platinum-group elements (PGEs). From the list of 61 kinds of MRMs that are strategic for Russia, the extraction of oil, gas, Cu, Au, PGEs, Ni, apatite ores, K salts, and diamonds (as well as nonlisted coals, Fe ores, Na salts, V, B ores, magnesite, and chrysotile asbestos) fully covers their current domestic consumption in the Russian Federation and the achieved level of export. U, Mn, and Cr ores; Zr; high-purity quartz raw materials (SiO2); bauxite (Al); graphite; fluorite and nonstrategic barite; kaolin; and bentonite are deficient; their exploitation only partially provides domestic consumption, which is largely dependent on imports; it is carried out in insufficient volumes in the presence of significant reserves of relatively low quality. The most deficient in this list are Ti, Li, Ta, Nb, and REEs (usually, there are groups of heavy and light rare earths (HREEs and LREEs, respectively)): their domestic consumption is provided mainly by imports with very limited production (despite large reserves, including low quality ores). Re, Be, Nb, Ta, HREEs, Y, Sc, LREEs, Ge, Ga, Li, Hf, and Co, and, of nonstrategic MRMs, Bi and Sr, should be considered critical MRMs in the Russian Federation. The most important source of dispersed/ associated elements is represented by raw materials of mining enterprises of nonferrous metallurgy: Cu and Zn subsectors, In, Ge, Ga, Cd, Tl, Se, Te, Sb, Bi, etc.; Al subsectors, Ga; for Au and Au–Ag deposits, Sb, As, Te, Se, Bi, Tl. An associated source of lithium is represented by brines of gas-condensate fields. The issues of assessing complex raw materials for high-tech industry are considered using the example of pyrite, porphyry, and gold-ore deposits of the Ural folded region, which play an important role in its overall metallogenic potential.

Aspects of the utilization for the technogenic territory of coal enterprises

Purpose. To perform an analysis of domestic and world experience in the implementation of technologies for the utilization of man-made territories of closed coal enterprises after the completion of their operation. Methods. To achieve the purpose, the authors, based on the analysis of scientific research literature concerning the directions of creation the production capacities after the completion of the mines functioning, proposed technologies for the formation of enterprises for the utilization of man-made territories and their further use. Results. The expediency and regularity of creating mining energy-chemical complexes (MEChC) based on closed coal enterprises for the disposal of pollution, secondary resources and energy in man-made territories is substantiated. This will contribute to the acquisition of ecologically clean land area, the use of underground resources, as well as the production of energy and chemical products that meet the needs of the industrial market. Originality. Consists in the systematization and scientific justification of the implementation of technologies for the use of man-made space in closed mines. The main regularities of the scientific means of studying the processes of adaptation of such processes in the mechanical preparation, processing, and energy utilization of secondary raw materials as part of the implementation of MEChCto the real conditions of the underground and surface space of the closed coal mining enterprise are highlighted. Practical implication. Development and establishment of the main technological aspects of the formation of a mining energy-chemical complex with the provision of stable utilization of man-made and energy space of coal mines with the obtaining of usable territories, fuel, technical industrial gases, thermal and electrical energy, and chemical products.

Experimental study on fuel consumption and smoke opacity of defective coffee-bean-based biodiesel fuel engines

This experimental study aims to analyse the performance of sorted coffee beans-based biodiesel. This study is carried out in three main stages; (a) the preparation process of coffee beans raw material, (b) the biodiesel formation process, and (c) biodiesel performance analysis. In manufacturing process, the coffee bean powder is added with two chemical treatments sequentially; extraction-distillation and esterification/transesterification. Parameters of analysis in this study are the characteristics of the biodiesel and the performance of the biodiesel-diesel mixture in terms of fuel consumption efficiency and engine smoke opacity. Measurements of Engine Running Time (ERT) and smoke opacity were carried out on a single-piston diesel engine. There were five biodiesel-diesel mixture specimens; B0, B5, B10, B15, and B20 (20% biodiesel fraction). The experimental results show that mixing biodiesel with diesel fuel provides two main advantages; extending engine running time which means fuel consumption efficiency, and lowering the smoke opacity level. Therefore, it is more environmentally friendly. The efficiency of fuel consumption and smoke opacity depends on the biodiesel fraction in the fuel mixture. The results and methodology of this research are expected to be an additional reference in the development of biodiesel as an alternative fuel.

Promotion and implementation of Polish mining investments in foreign markets on the example of Latin America

Foreign investments are essential in deepening economic relations between the EU and Latin America. As Latin America is fortunate enough to have deposits of metals that have become particularly desirable due to the green industrial revolution, it remains one of the dominant directions of exploration and investment in the mining sector. To intensify cooperation within the mining industries based on their complementarity, common goals, and shared values, the EU-Latin America Mineral Development Network Platform was established for all entities relevant to the mining sector, not only authorities but also businesses (including SMEs) and scientific and research units. To create a common European understanding of best practices in the processing and mining of raw materials in terms of social, environmental, and economic performance, voluntary EU principles for sustainable raw materials have been developed. Moreover, many EU countries working on updating or implementing (Poland) mineral policies, and more and more EU and Polish mining companies have been reporting non-financial aspects and impacts on local development, also in foreign countries. At the end of 2022, the European Commission proposed a Critical Raw Materials Act: securing the new gas & oil at the heart of our economy initiative to enhance the diversification and supply of critical raw materials to Europe. So far, the largest Polish foreign investment is a copper mine in Sierra Gorda in Chile, owned by KGHM Polska Miedź SA together with the Japanese Sumitomo Group (from February 2022, Australian mining group South32). Even according to KGHM CEO, Marcin Chludziński, the Sierra Gorda mine had needed restructuring and now is a demanding but very satisfying project. KGHM reported that the revised EBITDA for 2021 was the highest and achieved PLN 10.3 billion (ca EUR 2.3 billion) year on year (+56%) and for the first time, Sierra Gorda began to pay off its liabilities towards the owners. Moreover, the mine received an award in the category of large producers awarded by the State Mining Association in Chile (SONAMI). In addition to mining activities in the field of exploration and exploitation of deposits, Poland is developing cooperation in technology (mining machinery) and education. To ensure sustainable extraction of raw materials additional skills are required, in particular in the area of management and social sciences. The aim of the paper is to analyze and identify factors and best practices enhancing international cooperation and the environmental sustainability of minerals in line with the 2030 Agenda for Sustainable Development on the example of Polish investments in Chile. The analyzed case studies in a broader context, including the EU and Polish mineral policy, allow for the development of certain recommendations and tools for the promotion of foreign investments in the mining industry.

Review of Design and Production of the Injection Moulding Machine

Plastics are being employed for both light and heavy items in industrial settings more and more often. Plastic daily objects like bottle caps, remote control casings, needles, and more are created using injection molding equipment, along with large goods like automotive body panels. During the molding process, a liquid or flexible raw material is shaped using a rigid structure known as a mold. This technique originally became popular during the Second World War as the need for mass-produced items increased. It is now extensively utilized across various industries. This study examined the role of plastic molding machines in the design and production of these devices. To correctly examine the corpus of knowledge about the design and production of plastic molding machines, this was done by comparing and assessing already published, widely available works, beginning with early innovations and continuing with more recent advancements. The study's objective was met. Despite rising efforts to design and construct more modern machines that are economical and compact, it was noticed that the bulk of early injection molding machines were large. The injector molding machine has the potential for further improvement and local manufacture, according to the study's conclusions.

Techno-Economic Evaluation of Downdraft Fixed Bed Gasification of Almond Shell and Husk as a Process Step in Energy Production for Decentralized Solutions Applied in Biorefinery Systems

The objective of the present study was to carry out a technical study of the gasification of almond shells and husks at different temperatures and, subsequently, an economic analysis for the in situ installation of a decentralized unit to produce electricity, through a syngas generator, that would overcome the use of fossil fuels used in this agroindustry. The gasification tests were carried out at three different temperatures (700, 750 and 800 °C) and the results for the tests carried out were as follows: a 50:50 mixture of almond husks and shells was found to have a lower heating value of value of 6.4 MJ/Nm3, a flow rate of 187.3 Nm3/h, a syngas yield of 1.9 Nm3/kg, cold gas efficiency of 68.9% and carbon conversion efficiency of 70.2%. Based on all the assumptions, a 100 kg/h (100 kWh) installation was proposed, located near the raw material processing industries studied, for an economic analysis. The technical–economic analysis indicated that the project was economically viable, under current market conditions, with a calculated net present value of k€204.3, an internal rate of return of 20.84% and a payback period of 5.7 years. It was concluded that thermal gasification is a perfectly suitable technology for the recovery of raw materials of lignocellulosic origin, presenting very interesting data in terms of economic viability for the fixed bed gasification system.

Ecological Technologies of Recycling Vegetable Raw Materials

The relevance and perspective directions of development of plant waste recycling are shown. Examples of promising recycling technologies in crop production are given. It has been established that in order to increase the volume of processing of plant raw materials, to preserve the environment, it is necessary to use waste more widely to obtain new types of products.

Comparative Study of Cytotoxicity and Antioxidant, Anti-Aging and Antibacterial Properties of Unfermented and Fermented Extract of Cornus mas L.

Due to the high demand for products that can help treat various skin conditions, the interest in plant extracts, which are a valuable source of phytochemicals, is constantly growing. In this work, the properties of extracts and ferments from Cornus mas L. and their potential use in cosmetic products were compared. For this purpose, their composition, antioxidant properties and cytotoxicity against skin cells, keratinocytes and fibroblasts were assessed in vitro. In addition, the ability to inhibit the activity of collagenase and elastase was compared, which enabled the assessment of their potential to inhibit skin aging. Microbiological analyses carried out on different bacterial strains were made in order to compare their antibacterial properties. The conducted analyses showed that both dogwood extract and ferment have antioxidant and anti-aging properties. In addition, they can have a positive effect on the viability of keratinocytes and fibroblasts and inhibit the proliferation of various pathogenic bacteria, which indicates their great potential as ingredients in skin care preparations. The stronger activity of the ferment compared to the extract indicates the legitimacy of carrying out the fermentation process of plant raw materials using kombucha in order to obtain valuable products for the cosmetics industry.

Development of an LCA-based tool to assess the environmental sustainability level of cosmetics products

PurposeThe depletion of natural resources and the downgrading of the environment, driven by globalization and consumerism phenomena, are worldwide pushing the interest in sustainable manufacturing paradigm and environment preservation. It is moreover clear to academia and practitioners that the cosmetics industry needs to update its current operations to face new sustainable requirements and norms due to its ever-growing size and massive consumption of natural resources. Different methodologies, metrics, and indicators have been and are being proposed for solving the complex issues of environmental sustainability evaluation of cosmetics processes and products.MethodsAmong these approaches and methods, product-related assessment tools (e.g., life cycle assessment) are usually more focused on the environmental dimension of sustainability, and they are always based on the life cycle of the product. The core of this paper is on the development of a novel tool to classify cosmetics products based on the results of LCA: the eco-friendliness assessment tool (EFAT). The methodology of the work is structured into 5 main phases: definition of the scientific background of the work, definition of the tool requirements, tool development, testing of the tool, analysis of the results. The eco-friendliness assessment tool proposed is structured into two main parts: (i) process flow 1: environmental impact score and (ii) process flow 2: supplier environmental sustainability assessment.ResultsThe tool has been tested on a cosmetics product manufactured in a cosmetics company located in Italy. The acquisition of raw material process and primary packaging process are the two most critical processes resulting from the impact analysis of LCA methodology. The application of the EFAT tool shows the two possible most sustainable improved scenarios are as follows: (i) exploiting transportation of the primary packaging by sea and (ii) adopting the European location of the primary packaging supplier. The results coming from the tool application allowed the definition of the company product eco-friendliness. The eco-friendliness is symbolized by an alphabetical letter and a color.ConclusionsThe paper proposes a practical tool to assess the environmental sustainability level of cosmetics products, with the intention to overcome two of the main literature gaps found in the state of the art: (i) absence of LCA methodology implementation in the cosmetics industry on makeup products, (ii) absence of tools that rely on the results of the LCA analysis of a cosmetic product for understanding its sustainability level of sustainability.

THE DEVELOPMENT OF ENTREPRENEURSHIP IN RURAL REGIONS AND PARTNERSHIP AS AN INSTRUMENT FOR ITS ENSURING

Currently, the theoretical and methodological foundations of partnership as a tool for ensuring economic development remain little studied and require a detailed analysis of the existing experience, both domestic and foreign, as well as the development of universal models to ensure the effective practical implementation of partnerships at the tactical and strategic levels. It is proved that the development of rural entrepreneurship is an important aspect of the revival of rural areas in Ukraine and at the same time an important sector of the economy that plays a special role in creating competitive products, as it is the basis for further expansion of production and improvement of the well-being of the rural population. The article reveals the content and essence of the concept of partnership as the main tool for ensuring the economic development of entrepreneurship, the study of the key principles of the formation of this form of interaction. The authors proposed a scheme of key elements of planning the mechanism of economic development of entrepreneurship in the countryside, including common features of government, community, business and scientific component, which, when interacting, provide the result that manifests itself in supporting business, attracting external resources and strategic investments, as well as creating a favorable image of rural areas. The main motives of entrepreneurial activity in the countryside, which indicate the prospects for the development of rural areas, are identified. The components of partnerships in the direction of economic development of entrepreneurship in the countryside, which include consideration of socio-economic, natural, energy and administrative resources of rural areas, are investigated, this interaction allows to obtain efficiency: economic, social and environmental. The article proposes a model of economic self-sufficiency of an agrarian enterprise in rural areas, which shows the closed cyclical nature of economic development, using the example of an ECO-farm, which includes state support at all levels, new jobs, green tourism, processing and implementation, as well as social responsibility. The prerequisites for the partnership on the example of farmers, characterized by interaction (availability of common yards, purchase of fertilizers, rental of equipment, sowing campaign, supply of raw materials for the production of biofuels) and common features (processing of raw materials, sale of finished products in domestic and foreign markets) are revealed. Therefore, it was grounded that the prospects for the economic development of entrepreneurship in the countryside will directly depend on the established partnership.

FORMATION OF FOOD SECURITY OF UKRAINE IN THE CONDITIONS OF EUROPEAN INTEGRATION

The problem of food security in Ukraine today is more urgent than ever. Due to the intervention of the aggressor country in the socio-economic and political processes of Ukraine, the constant displacement of the population within the country and large-scale migration abroad, the destruction of infrastructure and other reasons, there is a negative impact on the production and stability of commodity agriculture and agro-industrial complex, including the impact on production of agricultural machinery and equipment, processing of agricultural raw materials, production of fertilizers, agrochemicals and other materials necessary for agriculture and providing citizens with food in general. The article examines the current problem of food security formation in Ukraine in the context of European integration. The current state of the food security system in the country was analyzed and the main challenges faced by Ukraine in the process of integration with the European Union were revealed. Particular attention is paid to the risks and technical aspects associated with the formation of food security in the context of European integration. The influence of the European integration process on the development of agriculture, in particular, the increase in export opportunities and the use of modern technologies, is considered. Strategies for improving food security in Ukraine through legislative changes and training of relevant specialists are proposed. It is recommended to introduce the effective agricultural methods that would reduce the impact on the environment and contribute to the preservation of the soil fertility, efficient use of water resources, improvement of transport and logistics infrastructure, investment to scientific research, development of scientific and technical development programs, etc. The article highlights the standards and requirements that are relevant in the EU in the formation of food security, and examines their impact on the Ukrainian economic system. The need to adapt national legislation to European standards was considered, and recommendations were made for improving the system of quality control and food safety.

Обоснование приоритетов структурных изменений в агропродовольственном комплексе Саратовского региона

Introduction. Modern challenges and threats to the development of the Russian agro-food complex determine the search for new growth sources of the complex, the strengthening of orientation towards the formation of a balanced functional and sectoral structure. The relevance of the regional aspect of research and substantiation of structural changes in the agro-food complex is associated with a deep socio-economic, natural-climatic and socio-cultural differentiation of the country’s regions. Theoretical analysis. Changing the role of regions in solving food security problems and providing the population with quality food is a global trend. The rupture of global food chains as a result of the COVID-19 pandemic and the sanctions confrontation strengthens the influence of local producers on the food market, suggests the need to form a multilevel agro-food complex of the country. Structural changes in the agro-food complex of Russia have their own characteristics associated with the heterogeneity of its spatial development. Empirical analysis. The accelerated growth of the agricultural sector of Saratov region economy due to the concentration on the production of a limited group of agricultural products (cereals and oilseeds, sugar) has been revealed. The regional food market segments, which have a surplus and shortage of products, are determined. It is substantiated that current trends extrapolation in the development of the regional agro-food complex preserves its unbalanced structure and further growth in the share of raw materials and primary processing products, while reducing the share of deep processing products. Results. Adaptation to new risks and threats is associated with an increasing trend towards the localization of production and supply of agricultural products and food. The priority areas for the development of the regional food system should be the diversification of agro-food production, local food chains formation with deep processing of agricultural raw materials, and the intensification of interregional exchange.

Разработка и внедрение инновационных технологий в животноводстве для обеспечения населения высококачественными продуктами питания

Purpose. Analysis of advanced technologies for the production of livestock products and factors affecting the links of the entire production chain: "plant growing – animal husbandry – feeding and keeping technology – breeding – production technology – obtaining and processing raw materials – finished products – consumer". Discussion. The subject of discussion are issues including: consideration of systemic biotechnologies for the production of livestock raw materials; study and implementation of ways to improve its technological properties when using selection methods of reproduction and improvement of genetic parameters; the use of biologically active substances and non-traditional feed ingredients that have a positive effect when exposed to numerous stress factors; the use of pharmacological agents and biotechnological processing methods on the state of animal productivity and the functional and technological properties of meat and dairy and raw materials. Conclusion. As a result of calculations, experiments and laboratory studies, fundamentally new competitive technologies for the production of domestic livestock products have been developed and widely introduced into production, factors that contribute to the growth and improvement of the quality of the raw materials obtained for the creation of new generation food products have been studied and improved.

Construction of Recombinant Escherichia coli with a High L-Phenylalanine Production Yield from Glucose

L-phenylalanine is an important aromatic amino acid that is widely used in the area of feed, food additives, and pharmaceuticals. Among the different strategies of L-phenylalanine synthesis, direct microbial fermentation from raw substrates has attracted more and more attention due to its environment friendly process and low-cost raw materials. In this study, a rational designed recombinant Escherichia coli was constructed for L-phenylalanine production. Based on wild type E. coli MG1655, multilevel engineering strategies were carried out, such as directing more carbon flux into the L-phenylalanine synthetic pathway, increasing intracellular level of precursors, blocking by-product synthesis pathways and facilitating the secretion of L-phenylalanine. During 5 L fed batch fermentation, recombinant E. coli MPH-3 could produce 19.24 g/L of L-phenylalanine with a yield of 0.279 g/g glucose. To the best of our knowledge, this is one of the highest yields of L-phenylalanine producing E. coli using glucose as the sole carbon source in fed-batch fermentation.

Влияние способа подготовки сырья для изготовления нативных стейков на их качественные показатели и органолептические характеристики

Purpose. Study of the influence of various methods of preparing raw materials for the production of native steaks on quality and organoleptic characteristics. Materials and Methods. The object of research was native beef steaks, which were made from raw materials obtained by various preliminary processing. Depending on the type of technological influences, the organoleptic characteristics of products (GOST 32125-2013), shear stress (GOST 52601-2006) and mechanical strength of meat (GOST 31797-2012) were studied. Results. As a result of the experiment, it was revealed that the experimental products (native steaks) had high organoleptic characteristics, namely: a more pronounced taste, color and aroma, consistency. This was achieved due to increased proteolytic activity of proteins, their faster splitting into amino acids, which affects the taste formation. Also, when using the developed method for preparing raw materials, a higher complex effect on meat proteins of proteolytic enzymes of the gastric tract (pepsin and trypsin) was noted and, as a result, an increase in the digestibility of the studied steaks. The methods and modes of preliminary exposure and processing of raw materials contribute to the increase of the hydrothermal effect, which improves their consistency, namely: the steaks processed by the proposed method had better organoleptic properties and more worthy results in terms of the tension of the slice of boiled meat – 350 H/m2, mechanical strength – 52.70%. All this can favorably affect the further development of finished products. Conclusion. It has been established that the use of the developed method of processing raw materials for the preparation of native steaks has a positive effect on the organoleptic characteristics of products, and also improves their quality indicators, which makes it possible to obtain products with good organoleptic characteristics, as well as quality characteristics.

Raw Material Inventory Planning And Control To Achieve Inventory Cost Efficiency Case Study At PT. "X" In Surabaya

Raw materials are something that is very important for companies, especially for the production process. Overstock results in high costs of purchasing, storing and maintaining in warehouses. Meanwhile, outstock results in the cessation of the production process which causes large losses to the company because it cannot order sales. Therefore, to maintain the smooth production process, a planning and control of raw materials is needed, namely by using the EOQ (Economic Order Quantity) method as a means to solve raw material problems that are fulfilled. Case study at PT. “X” indicates that the company experienced overstock of Curcuma Rhizoma raw materials which resulted in high inventory costs for Curcuma Rhizoma amounting to IDR 7,742,469 and for Mellaleuca Fructus IDR 12,116,880. From the discussion it can be concluded that inventory management with the EOQ method. and raw material inventory control becomes more efficient so that the company can provide adequate raw materials to smooth the production process. This study shows that there is a significant difference if the company applies the EOQ method, in which the company can save costs of Rp.