bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Bifurcation analysis of Prey-Predator Model in The Presence of Stage Structured with Harvesting and Toxicity
Authors: Majeed Azhar Abbas , Ismaeeb Moayad H. 
Published: November 2019

Abstract
For a mathematical model the local bifurcation like pitchfork, transcritical and saddle node occurrence condition is defined in this paper. With the existing of toxicity and harvesting in predator and prey it consist of stage-structured. Near the positive equilibrium point of mathematical model on the Hopf bifurcation with particular emphasis it established. Near the equilibrium point E0 the transcritical bifurcation occurs it is described with analysis. And it shown that at equilibrium points E1 and E2 happened the occurrence of saddle-node bifurcation. At each point the pitch fork bifurcation occurrence is not happened. For the occurrence of local bifurcation illustration there used some numerical simulation.
Manufacturing the Polymeric Metallic Connectors by the Investment Casting Method
Authors: Kadium Akeel Hssain , Ghazi Israa Faisal , Abdulwahid Qasim Saad 
Published: November 2019

Abstract
In this article, the problems that arise in the procedure of molding by the investment casting method are considered. Information about polymeric metallic materials, their application features is described. The important aspects of the quality of molding manufactures be investment casting method are considered. Some methods for improving the quality of products are proposed. The optimal technological process, to choose the size and number of ingredients of the molding mixture to recycle the shell forms as raw materials, has been found by field experiments and the obtained technological process was resource-saving, highly productive, with a lower cost of the produced details.
Preparation and improvement of Thermal Expansion Coefficient and Impact Strength of (PMMA\CaAl2O4) system
Authors: Farhan Fadhil K. , Thejeel Mohammed Abdul-nebi , Aoda Jafar F. 
Published: November 2019

Abstract
In this research, a biocompatible polymer system was developed with the body of the organism supported by a two-phase ceramic powder consisting of a mixture of calcium oxides and alumina powder. Samples were obtained using a fluid mixing method and using ultrasound technology to distribute the powder and spread it within the polymer (PMMA). The weight fraction used for reinforcement was (0%, 1%, 2%, 3% and 4%). The thermodynamic analysis technique (TMA) was used to complete and test the thermal expansion coefficient for a certain temperature range between 20-250 ° C where the results showed a significant improvement in thermal expansion coefficient at temperatures below 100 ° C for prepared composites at 3%wt. compared with that of the unsupported polymer showed a significant expansion at the same temperature range. Impact strength have measured by using Charpy test for all samples with a standard dimension of 5.5cm × 1cm×1cm. The pendulum angle was stabilized at 150 °, where all the prepared composite showed high impact strength, hardness and fracture toughness, respectively, compared with the polymer material. The tested powder was tested using x-ray diffraction as well as the scanning electron microscopy and x-ray dispersion spectrometry to determine the ratios and interacting compounds in the preparation of biochemical powder.
Poultry by-products as a basis of combined meat and vegetable feed for domestic animals
Authors: Khabibullin R , Khrundin D , Sabirzyanova R , Ezhkova G 
Published: November 2019

Abstract
The use of poultry by-products remains one of the urgent strategies of the economic efficiency increase for a variety of reasons. The most effective is the by-products processing into the meat and bone meal with a high content of amino acids, fatty acids, vitamins and minerals and consequently with high nutritional value. This meal may be used individually and as a basis of the combined feed for domestic animals. The possibility of using poultry by-products as a basis for feed of domestic cats and dogs was studied. The quantitative and qualitative assessment of carcass after the duck Anas platyrhynchos domesticus manual deboning was carried out, and the moisture, proteins and fats content was determined by conventional methods. It was shown that the duck carcass had high nutritional value and can be used as a basis for domestic animals feed. Drawing up a recipe of the combined feed including duck carcass meal, additional protein sources and natural vegetables was carried out. The developed calculation and optimization computer program “Optipet” for the combined feeds recipes optimization was used, which allowed to determine the minimum cost value of the combined feed as required by current law documentation.
Prospects of construction of facilities for processing and storage of radioactive waste of the NPP
Authors: Subbotin A , Grabilina Y , Dneprovskiy D 
Published: November 2019

Abstract
Use of nuclear fuel on the nuclear power plants (NPP) requires special attention at the further order of radioactive waste (RW). Therefore there is a requirement of innovative and perspective approaches of construction of facilities of processing and storage of RW to protect the environment from a large number of radiation. Relevant the question of prospects and new approaches to construction of these objects arises at design, construction and operation where high requirements of objects of nuclear sector are considered. Nuclear sector, occupies one of key positions in the 21st century. Solvable tasks in the field of the analysis of methods of processing and storage of radioactive waste of the NPP, will allow to make construction of facilities of nuclear power safer and eco-friendly that in the international practice is one of priority tasks for these objects.
The relevance of re-equipment of thermal power plants under solid waste fuel
Authors: Subbotin A , Trufilov I , Vovkogon D 
Published: November 2019

Abstract
The use of thermal power plants (TPPs) as energy facilities in world practice is the most popular way to generate electricity. Traditional fuel for these objects is used in the form of coal and gas. Also, in world practice, other types of fuel are used for TPPs, namely, municipal solid waste (MSW). The relevance of the research is the proposal for reliable and technological re-equipment of thermal power plants, thereby solving the problem of the environmental situation in the near radius of the construction of thermal power plants for the disposal of solid waste. The object of research is thermal power plants and their ability to re-equip. The main purpose of the research is to analyze the world and domestic experience in the implementation of solid waste as a fuel for thermal power plants and to offer current technological solutions.
Study on the sorption capacity of the adsorbent based on polyurethane and chitin to remove oil spills
Authors: Trang Y D T , Zenitova L A 
Published: November 2019

AbstractNowadays, oil and its derivatives were considered one of the major energies and they also have been one of the main sources of environmental pollution, especially for water pollution. The tendency in this time of researchers was to find new adsorption, that has high sorption capacity, economical and easy production. By accordance with the present trend, in this study, chitin was used with the dose up to 50% as a filler in the composition of adsorbents basic on polyurethane foam (PUF). The effect of the size (small size: 1-3 mm and large size: 5-10 mm) and the dose (10, 20 and 50%) of filler in the foaming composition to technological parameters of the collected adsorbent, as well as to its absorption capacity were investigated. The results showed that the adsorbents filling with a lower dose of chitin (10 and 20%) were better foaming than the one containing a higher dose of filler. At the same time, the adsorbents containing small chitin also formed the foam better than one filling large size. For 2 types of PUF, the adsorbent from elastic PUF has higher sorption capacity than the semi-elastic adsorbent with the same dose of the filler. For the results of sorption effectivity of the adsorbents presented that the adsorbent with the small size of filler observed greater the absorbency than the one with large size. In which, the elastic adsorbent containing 10% chitin with small size has the highest oil absorption capacity, which reached 13.13 g/g. To compare the sorption capacity of the adsorbent between relation to oil and water, it shown that its oil capacity is significantly higher than the sorption capacity of water.
Waste management system in the brewing industry
Authors: Zhichkin K , Nosov V , Zhichkina L 
Published: November 2019

Abstract
Waste management implies such an organization of an enterprise economic activity in which, at the lowest possible level of environmental pollution, an organization creates the prerequisites for efficient utilization, reuse and imparting additional useful properties to waste in order to obtain an additional economic effect. In the Samara region, significant financial resources are spent annually on waste disposal activities, which could be used to increase production efficiency in industry and agriculture. Only current costs of environmental protection from 2011 to 2016 increased from 7.3 to 10.3 billion rubles or by 41.0%. In addition to this, investments in fixed assets related to environmental protection amounted to 2.3 billion rubles in 2011, up to 5.9 billion rubles - in 2014. Among the various types of pollution, solid waste ranks second (about 30%). In the brewing industry, the main type of waste is brewery mash, formed from grain residues. To properly dispose of it, a large area for storing waste is required, and the possibility of use in the future as an organic fertilizer. All this requires significant capital and disposal costs. At the same time, the brewer can be used as a high-quality feed. The article proposes a waste management system that provides for the interaction of the beer industry enterprises with pig-breeding complexes. Activities include the use of brewery mash as a valuable feed for the replacement of concentrated feed. As a replacement result, daily gains increase by 5-7%.
Hydrothermal liquefaction-isomerization of biomass for biofuel production
Authors: Kotelev M , Tiunov I , Ivanov Evgenii , Namsaraev Z 
Published: November 2019

Abstract
During the last years, a lot of research activity has been devoted to a biomass conversion into liquid fuels. In order to produce fuels of the same quality as those obtained from crude oil, an appropriate conversion technology is required. Hydrothermal liquefaction (HTL) of biomass is a catalytic process that is considered to be a very promising technology for biofuel production. HTL products have a relatively high content of gasoline and diesel fractions, low oxygen content and high heating value. Moreover, HTL does not require a drying of the raw materials prior to conversion that allows a significant reduction of the price of the biofuel. We developed a new catalytic system for HTL, consisting of halloysite nanotubes as aluminosilicate carrier and strontium/titanium/tin oxide as an isomerizing component. Due to the sufficiently high specific surface area of halloysite nanotubes, a higher content of gasoline fraction in biocrude products was achieved. In addition, the introduction of the isomerizing component significantly increased the octane number of the gasoline fraction.
Functional beverages containing pectin from different raw material
Authors: Limareva N , Donchenko L , Malaknov V , Semenova E 
Published: November 2019

Abstract
The article presents the results of experimental studies on the development of new types of pectin-containing beverages. Vegetable and berry juice, liquid pectin and natural flavor are selected as a recipe basis of drink. The results of study of chemical composition of the developed beverages showed that the recipe ratio of the selected raw materials provides an optimal ratio of physiologically active components, giving them functional properties. Such data provides a basis for their inclusion in the human diet to reduce the number of alimentary diseases.
Silica extraction from integrated refinery of rice straw for production of value-added products
Authors: Dinh Cuong Thai , Duy Hung Nguyen , Le Quang Dien , Zenitova Lubov A. , Trung Thanh Nguyen 
Published: November 2019

Abstract
Rice straw is an agricultural residue from rice production, which can be a potential lignocellulosic feedstock for various value-added products. In this study, silica was extracted from the rice straw. The biomass was pre-treated with ethanol and was cooked with 18% w/w sodium hydroxide to extract lignin and silica. The silica was precipitated from the alkaline solution using 30% sulfuric acid to pH 11.5 and was recovered through centrifugation. The obtained solid was washed and then combusted at 575 °C for 6 hours. The obtained ash was dissolved in sodium hydroxide solution at pH 8.0 and then re-precipitated by sulfuric acid to form silica powder, which obtained a yield of about 6.7% w/w dry rice straw. The characteristics of amorphous disk-formed silica, determined using XRD, SEM, EDS, and FT-IR.
Glycerol modifier influence on interfacial activity of bentonite during the adsorption of o-toluidine
Authors: Kosarev A V , Tikhomirova E I , Politaeva N A , Podolsky A L 
Published: November 2019

Abstract
This paper is devoted to the study of changes in the surface activity of systems containing unmodified bentonite and bentonite modified with glycerol additives upon adsorption of o-toluidine. A relationship between surface activity and the value of o-toluidine adsorption on modified aluminosilicate was obtained. It is shown that the presence of a modifier-glycerol in the adsorption system enhances the process of lowering the surface tension.
The use of clays materials of the Tyumen region in the treatment of natural and waste water
Authors: Zagorskaya A , Pimneva L 
Published: November 2019

Abstract
An assessment was made of the ecological status of water bodies in the South of the Tyumen Region, which play a significant role in the region’s water use and are sources of drinking and industrial water supply. The hydrochemical characteristics of natural waters and the water use conditions that determine the indicators of water quality in water bodies and streams are considered. Critical levels of pollution have been established for zinc, copper, manganese, iron, cadmium, chromium, nickel and aluminum in all water bodies of the Tyumen region. The reasons for optimizing the purification processes at the existing water supply and wastewater treatment facilities in the region are given. The structure and chemical composition of clay materials of the Tyumen region was studied. The efficiency of extraction of nickel ions of kaolin, montmorillonite and mixed kaolin and montmorillonite clays has been investigated. The quantitative characteristics of the process of nickel ion adsorption on all the presented natural clays are obtained. It is established that the mixed natural clay has higher values of exchange capacity in relation to nickel ions. It is noted that the description of the adsorption equilibrium corresponds to the Langmuir model. The possibility of using kaolinite, montmorillonite and mixed clays as a reagent for purifying natural and waste waters at the existing treatment facilities of the Tyumen region is presented.
Liquidation of oil spills using a sorbent based on chitosan
Authors: Quynh Anh Quyen Thi , Zenitova L A 
Published: November 2019

Abstract
The development of a sorbent for the oil spill treatment based on polyurethane foam and chitosan. Chitosan is a polysaccharide – an insoluble fiber type – derive from chitin which is found in the shells of some marine life such as shrimp, lobster and crab. It is also found in some types of edible fungi and insects.
Carry out a research into the technology of polyurethane foam filling with chitosan in the amount of 20% and 50% by mass. Elastic and semi-elastic polyurethane foam was used as a polymer matrix of the sorbent. Sorbents with 20% chitosan by mass have the best oil absorbent capacity. Absorbent capacity of the sorbent based on elastic polyurethane foam, full filled with chitosan, soluble in acid, is ∼ 12, 65 g / g, and the semi-elastic sorbent, full filled with chitosan, soluble in acid, is ∼ 6.12 g / g. Regardless of the polymer matrix type, the sorbent has a high buoyancy (does not sink in the carbonated state), and the full saturation of the sorbent with oil occurs almost for the first 15 to 20 minutes
Deactivation of the catalytic complex of obtaining alkylbenzenes by oxygenate compounds
Authors: Bayguskarova E , Mukhamedzyanov R , Vasilyeva E , Akhmedyanova R 
Published: November 2019

Abstract
The possibility of environmentally safe and energy-saving deactivation of the catalytic complex based on aluminum chloride used in the process of alkylation of benzene with olefins, oxygenate compounds – epoxy soybean oil, propylene oxide and isopentane oxidation products is shown. It has been established that the deactivating ability increases in the series: oxygenates → propylene oxide → epoxidized soybean oil (ESBO).
Increasing the Waste Management Efficiency in the Arctic Zone of Russia through the Projects of Eco-Industrial Parks’ Development
Authors: Liubarskaia M , Tsurkan M , Artemiev A 
Published: November 2019

Abstract
The relevance of the study is due to the waste management and environmental safety issues at the territory of the Arctic zone of Russia. Some of these problems could be solved in the process of creating and operating of eco-industrial parks on the basis of a project approach. The purpose of the article is to systematize the ideas on the possibilities of applying project management for the development of eco-industrial parks in the Arctic zone of Russia. The article clarifies the concept of “eco-industrial park” in the framework of relevant Russian legislation and practice. The classification of eco-industrial parks has been developed taking into account different characteristics, including content of main waste flow and type of processing technology. The main challenges for the implementation of the project approach on the territory of the Arctic zone of Russia are indicated. The results of the research are of practical importance for public authorities, the governing body and residents of eco-industrial parks, specialists in the field of waste management, scientists studying the environmental and economic aspects of the Arctic zone of Russia.
A study of the chemical composition and antioxidant properties of products of wild berries processing
Authors: Nilova L , Malyutenkova S , Ikramov R 
Published: November 2019

Abstract
The article presents the results of studies of the chemical composition and composition of individual antioxidants of bilberries and lingonberries and their marc, which are waste products after squeezing the juice from the berries. The yield of juice from berries averaged 64%. Dry substances, acidity, composition of sugars, pectin substances and individual antioxidants - total phenolic compounds, total flavonoids, total anthocyanins were determined in berries and in the marc. During squeezing of the juice, a redistribution of chemical components was occurred with a predominance of total phenolic compounds, total flavonoids and total anthocyanins in the marc. As a result, the marc showed higher antioxidant properties than juices, which were investigated using the DPPH and FRAP methods. The antioxidant properties of the marc are due to the transition in them of anthocyanins, which make up 64% and 59%, respectively, of their total amount in bilberries and lingonberries. The correlation between DPPH and FRAP tests for anthocyanins was more than 0.952.
Development of territorial scheme of municipal solid wastes treatment in Tyumen region
Authors: Gaevaya E , Tarasova S , Udartseva O 
Published: November 2019

Abstract
At the present time the majority of wastes have negative influence on the environment. At the same time, about 70% of wastes can be used repeatedly, as raw material, transforming them into new products and materials. Russia possesses the existing and commissioned waste recycling and waste burning plants. But only 3-15% of municipal solid waste are utilized. Moreover, many of these plants are not loaded at full capacity or have to buy the wastes abroad. This is due to the fact that Russia still doesn’t have effective system of wastes treatment – separate collection and following utilization or waste neutralization. To prevent the increase of areas of used municipal solid waste fields and unauthorized dumps, it’s required to track the full chain of wastes movement from the place of their formation to the place of their dumping.
Justification of methodological approaches to standardisation of irrigation as an element of resource saving and minimization of the anthropogenic load on agrobiocenosis
Authors: Olgarenko G , Olgarenko V , Olgarenko I , Olgarenko V I 
Published: November 2019

Abstract
The analysis shows that the value of agricultural crops’ evapotranspiration is influenced by many non-linearly changing factors in the closed system “soil - plant - atmosphere”. Therefore, the method of determining evapotranspiration is complemented by computational models, with the help of which evapotranspiration is determined with a sufficient degree of accuracy from the results of actual observations, including the hydrometeorological parameters of the corresponding irrigated areas, followed by comparison of these values with data obtained when determining potential evapotranspiration on the existing networks of hydrometeorological and water balance stations. As a result of research, empirical dependencies of multivariate determination of evapotranspiration, as well as on moisture reserves in the calculated soil layer and potential evapotranspiration, were established, taking into account the growth and development phases and the microclimatic coefficient of the summer planting period. The above methodological approach substantiates the new water and energy saving methods of forecasting, planning of irrigation processes of agricultural crops and operation-al management based on the spatial and temporal variability of hydrometeo parameters and actual moisture reserves in the calculated soil layer for the conditions of use of livestock waste.
The role of waste banks in the reduction of solid waste sent to landfill in Semarang, Central Java, Indonesia
Authors: Budihardjo M A , Wahyuningrum I F S , Muhammad F I , Pardede R 
Published: November 2019

Abstract
Approximately 1,000 tonnes of solid waste are generated in Semarang every day, only 850 tonnes of which are transferred to the Jatibarang Landfill. Solid waste that is not transferred to the landfill can trigger environmental and health problems. With the help of community groups, reduction of solid waste is achievable using ‘the three Rs’ of waste reduction and the implementation of waste banks. Waste banks could act as mediums for depositing waste, improve the socio-economic status of local residents, and develop community connections. Waste banks improve the volume of waste reduction and reduce landfilled waste, helping to extend the operational life of landfills. This study examined the role of waste banks in Semarang and the potential to improve waste management based on the sampling of solid waste generation and composition. This topic was investigated with a purposive sampling method. Results showed that the existing system of waste banks in Semarang is ineffective in reducing waste. However, the system could be improved by increasing waste bank usage, including for various types of valuable waste in Semarang.