bluuebunny/crossref_metadata_2025_split huggingface dataset:
Three dimensional nanofibrous and compressible poly(L-lactic acid) bone grafts loaded with platelet-rich plasma
Authors: Koç Sena , Çakmak Soner , Gümüşderelioğlu Menemşe , Ertekin Tülay Selin , Çalış Mert , Yılmaz Mahmut Muhsin , Akcan Gülben , Çaylı Sevil 
Published: March 2021

Abstract
In this study, nanofibrous matrices of poly(L-lactic acid)-hydroxyapatite (PLLA-HAp) were successfully fabricated by three-dimensional (3D) electrospinning for use in the treatment of irregular bone damages. Compressibility analysis showed that 3D nanofibrous grafts occupied at least 2-fold more volume than their 2D form and they can easily take shape of the defect zone with irregular geometry. Moreover, the compression moduli of the PLLA and PLLA-HAp grafts were calculated as 8.0 ± 3.0 kPa and 11.8 ± 3.9 kPa, respectively, while the strain values of the same samples at the maximum load of 600 kPa were 164 ± 28% and 130 ± 20%, respectively. Treatment of the grafts with aqueous sodium hydroxide solution increased the surface roughness and thus the alloplastic graft materials (PLLA-HAp/M) protecting the fiber morphology were produced successfully. Then, platelet-rich plasma (PRP) was loaded into the surface modified grafts and activated with 10% calcium chloride. The efficiency of the activation was evaluated with flow cytometry and it was found that after activation the percentages of CD62 (P-selectin) and CD41/61 (glycoprotein IIb/IIIa) proteins increased approximately 4-fold. Surface hydrophilicity and biological activity of the PLLA-HAp grafts were enhanced by fibrin coating after PRP activation. The in vitro cell culture studies which were carried out by using mouse pre-osteoblasts (MC3T3-E1) showed that graft materials supported by PRP increased cellular proliferation and osteogenic differentiation significantly. The in vivo results demonstrated that compared with bare PLLA-HAp/M grafts, the PRP loaded grafts (PRP-PLLA-HAp/M) induced significantly greater bone formation based on computed tomography, histological and immunohistochemical analyses. Our findings suggest that 3D PLLA nanofibrous matrices can be used as a graft material for irregular bone defects especially when combined with PRP as an osteogenic induction agent.
Green finance
Authors: Ivanova N G , Katsyuba I A , Firsova E A 
Published: March 2021

Abstract
Many countries are currently forming and developing a green financial system focused on economic growth, social security and environmental protection. The paper provides a rationale for the term green finance and proves the need for reorganization of the financial system with regard to environmental problems that pose significant risks for the financial sector. Systematization and analysis of green stimulus policies used in global and Russian practice with account of the economic crisis of 2020, and assessment of the state of the environmental segment of the financial market made it possible to single out green bonds and loans as the most promising financial instruments, as well as to formulate the main tasks faced by the governments of most countries for development of green finance and to justify the need for standardized approaches to assessing the effectiveness of environmental projects, to improve green financial products, and to attract a wide variety of investors, including the population, for funding regional and municipal green projects.
Lessons on technopreneurship in Kaliningrad region: regional hubs in global networks
Authors: Polyakov R K 
Published: March 2021

Abstract
Over the past quarter of a century, the concepts of cluster development and entrepreneurial ecosystems have become very popular, which caused a heated debate about their relevance and conceptual rigor. In addition, the existing literature on clusters underestimates the role of entrepreneurs in enhancing the agglomeration effect that ties together organizations, labor, markets, and supporting ecosystems. This paper aims to study the main lessons of the development of technopreneurship in a specific region, namely in Kaliningrad region, and to show the path for creation of regional growth hubs and their embedment in global networks. The best practices are analyzed to highlight the priority areas of industrial development in the region. A conceptual model of its growth driver is proposed. Thus, the paper contributes to the existing debate about the directions of technopreneurship development and shows a specific growth point in global networks for the studied region.
Digitalization in the context of solving ecosystem problems in the fishing industry
Authors: Mnatsakanyan A G , Kharin A G 
Published: March 2021

Abstract
Intensification of fisheries and aquaculture leads to an increase in anthropogenic pressure on ecosystems. The stability of many aquatic ecosystems, the most important suppliers of goods and services for human needs, is currently threatened. The concept of sustainable development that includes ecosystem approach to management is called upon to eliminate the threat of their degradation due to excessive economic use. The paper discusses the key problems arising from the exploitation of aquatic ecosystems, analyzes the features of the ecosystem approach to fishery management, and proposes a modified bioeconomic model to describe how digitalization of the fishing industry promotes the solution of its ecological, economic and social problems. The authors concluded that digital technologies make it possible to more accurately identify the optimal scale of fisheries and sustainability of aquatic ecosystems as the basic resources of this activity. Digitalization helps move to a new bioeconomic technological platform in fisheries, which is a responsible involvement of biological resources in the economic circulation that ensures a balanced and harmonious coexistence of business and ecosystems.
Digitalization of fisheries enterprises management
Authors: Mnatsakanyan A G , Kuzin V I , Sergeev L I 
Published: March 2021

Abstract
The introduction of digital methods into the management practice of fishery organizations is a complex problem due to the historical nature of the existing methods of management of fishery enterprises. The aim of the article is to develop methodological approaches to the digitalization of management systems for enterprises in the fishery sector based on the experience gained in the framework of process management. A research methodology is a systematic approach, within which digital transformations of industry management are considered as an integral part of the overall development process. The article analyzes the factors influencing the introduction of new management methods. A model for describing management processes within the framework of process management has been built, its advantages and disadvantages are discussed.
Modernization of marine ports electrical power supply systems in the framework of zero-emission strategy
Authors: Nikishin A J , Kharitonov M S 
Published: March 2021

Abstract
The article describes some approaches to the modernization of the power supply system of marine ports in the framework of zero-emission strategy. A case study of the Kaliningrad sea fishery port given as an example. The authors analyze the electrical power supply system of the enterprise and its power balance, proposing several solutions to improve energy efficiency, reliability and energy loss reduction using distributed renewable energy sources such as wind and solar generation.
Technique for testing small wind turbines by method of acceleration in the wind tunnel and in the field
Authors: Gribkov S V 
Published: March 2021

Abstract
A technique is proposed for obtaining aerodynamic and mechanical characteristics of wind turbines – the wind energy conversion coefficient and the relative torque of the wind turbine as a function of their speed with respect to the intensity of the wind wheel acceleration from the moment of its start until the synchronous speed at constant wind speed. The proposed technique simplifies and significantly reduces the time for experimental testing of wind turbine wheels.
Gordonia: versatile actinobacteria for biotechnology
Authors: Lienkamp A C , Haarmann M , Tischler D 
Published: March 2021

Abstract
The versatile genus Gordonia of the order Actinomycetales comprises numerous biotechnological interesting members. They often possess large genomes and plasmids which provide an arsenal of metabolic capabilities such as for the production of secondary metabolites, biosurfactants, bioactives, exopolysaccharides or carotenoids. Further, many can degrade a huge variety of complex organic molecules making them interesting for bioremediation. Gordonia rubripertincta CWB2 was found to harbour a novel styrene degradative pathway involving glutathione. This pathway is more similar to detoxification routes in higher organisms than to other bacterial routes for styrene metabolism. However, it seems to base on a mix of genes from styrene and isoprene pathways which created this novel pathway, likely by horizontal gene transfer. Now, we like to study this route in more detail and make use of it in order to produce phenylacetic acids such as ibuprofen.
Specialized diet based on modified collagen-containing fish tissue
Authors: Barotova M A , Kazimirova A E , Andreev M P 
Published: March 2021

Abstract
The study addresses the issue of complex processing of collagen-containing fish raw materials, and expansion of the range of specialized fish products of osteotropic action such as biocrips and protein bars. Small Baltic bream and heads of Baltic sprat, by-product of canned sprat production, were used as raw materials. The raw materials were pre-modified by high-temperature hydrolysis to break down collagen-containing connective tissues and soften bone tissues. Hydrolysis was performed in a thermoreactor in an aqueous medium at 120-40 °C, under pressure of 0.15 to 0.20 MPa within 60–90 minutes. Heat-treated raw materials were divided into fractions, which were used in specialized product processing. Chemical composition of raw materials and finished products was investigated. The technology of biocripts based on thermally modified muscle tissues of Baltic bream and bone supplement from its bones has been proposed. The formulation and technology of molded bars based on sublimated water-soluble protein fractions and a protein-mineral supplement made from heat-treated heads of Baltic sprat are substantiated. The functionality of the products in terms of the mineral content is shown. Recommendations for the use of specialized products for groups of people with deficiency of calcium, phosphorus, for sports and gerodietetic nutrition are elaborated.
Efficiency of using vegetable proteins in trout feed
Authors: Vapirov V V , Yu Kuchko T , Matrosova S V 
Published: March 2021

Abstract
The article presents the results of quantitative indicators of the growth of rainbow trout when growing feed with a partial replacement of animal proteins with plant proteins. The results obtained show that the growth rate of fish and the feed coefficient when replacing protein by 10% with plant proteins do not change, provided that the animal, as well as the macro- and microelement balance of feed, are observed.
Fish supportive, connective and integumentary tissues in food biotechnology
Authors: Zemlyakova E S , Yu Klyuchko N , Orlov I O , Fartisheva A L 
Published: March 2021

Abstract
The relevance of the study is due to the insufficient use of the biopotential of the supportive, connective and integumentary tissues of fish (bones, cartilage, fins, heads, scales, skin), which are considered by many scientists as sources of valuable biologically active substances that can be used as functional ingredients in food biotechnology. Collagen and its hydrolysis products, chondroitin sulfate, glycosamine, hyaluronic acid, minerals (calcium, phosphorus, potassium, magnesium, etc.) are the most important components in maintaining human health and, especially, in the prevention and treatment of diseases of the musculoskeletal system. Therefore, the use of hydrolyzed fish tissues as sources of biologically active substances is promising. The biotechnological method of raw material degradation (enzymatic hydrolysis) is the most appropriate, allowing not only to preserve the biopotential of the native tissues, but also to ensure the reliability and sustainability of the production process. The article presents the results of the study of the chemical composition of fish supportive, connective and integumentary tissues, describes the technologies for obtaining new products using these biologically active substances generated by enzymatic hydrolysis.
A review of the cultivation potential of turbot (Scophthalmus maximus (L.)) in the Baltic Sea region: a promising candidate species for marine aquaculture in Russia
Authors: Pyanov D 
Published: March 2021

Abstract
Turbot (Scophthalmus maximus (L.)) is regarded as a good quality product that enjoys widespread acceptance and is therefore a popular choice for marine aquaculture in Europe. This study examines the potential and feasibility of the artificial cultivation of turbot in the Baltic Sea region. It takes into consideration both commercial farming and the implementation of artificial reproduction for stock enhancement programs. With regard to the latter, it discusses observed short-term trends towards reducing species catches in ICES 22-32 subdivisions as well as trends in hydrological process dynamics during the spawning process (especially low water salinity, which decreases the natural reproduction efficiency). The article also considers the potential of the research performed in 2018-2019 at the AtlantNIRO research facility on the development of cultivation techniques for turbot larvae. The findings demonstrate the possibility of cultivating turbot larvae under artificial conditions and are important for the development of marine aquaculture in the Kaliningrad region of Russia, since they can lead to the introduction of new fish species for farming in the future.
Study of the combined effect of a biologically active composition based on apiculture products and peptides extracted from fish scalein the training of athletes in speed and strength athletics disciplines
Authors: Mezenova N Y , Verkhoturov V V 
Published: March 2021

Abstract
The efficiency indicators of using a biologically active composition based on apiculture products and low-molecular-weight peptides extracted from fish scales were studied. The food supplement for athletes was named “Apicolltonus”. Spectrophotometry has shown that sardine scale peptides with molecular weight under 10 kDa with concentration of 1 mg/ml exhibit the greatest resistance to cytotoxicity when exposed to cobalt chloride on mesenchymal stem cells. The safety indicators of the food supplement “Apicolltonus” meet the requirements of the technical regulations of the Eurasian Customs Union. The physiological effect of the food supplement “Apicolltonus” on the body of female track and field athletes specializing in the long jump during the training process was evaluated. According to the results of clinical and biochemical blood tests of the testees a positive dynamics of growth in the levels of red blood cells, hemoglobin, total protein, calcium and iron was established, while reducing the content of urea, uric acid, lactate, total cholesterol and low-density lipoproteins. Improved adaptation of the test group to physical activity in terms of heart rate (HR) was noted. The positive effect of the bio-product on the speed and strength indicators of the athletes in terms of long jump from a standstill, triple jump from a standstill, long jump with 4 running steps, multi-jumps from foot to foot 30 m, shuttle run 3 to 10 m, run 30 m was indictaed. It is recommended to use the bio-product for athletes and people with active lifestyle.
High temperature record for lithium-ion battery with PCM: design and simulation validation
Authors: Yin Deyou , Ni Jimin , Shi Xiuyong , Zhang Hehui 
Published: March 2021

Abstract
Under abuse conditions, the temperature of lithium-ion battery increases rapidly and brings high safety risk. To monitor the high temperature incident of battery with a simple and reliable method, a novel design scheme was presented and validated by thermal numerical calculation, in which phase change material (PCM) block is bonded with the battery shell and gets melt down when the battery temperature exceeds its phase-transition point. The melting process is irrecoverable and can be perceived by easy visual observation. Computation results show that the temperature rising of the PCM block gets slower when it meets the melting point, but it generally increases synchronously with the shell of the battery and can be used to reflect the temperature rising of the inner cell. Thus the design scheme is valid, and may possess a good applied perspective in the after-sales maintenance and second-hand transactions of lithium-ion battery.
Research on key technology of high speed auger
Authors: Xu Pengbo , Wu Di 
Published: March 2021

Abstract
In order to solve the problem of hole collapse and low construction efficiency in the process of soft media gas extraction. A full hydraulic drilling machine with high drilling speed, cross belt construction ability and strong process adaptability has been developed. Through the industrial test, the high efficiency of the drilling machine in the construction of soft coal gas extraction hole is verified, and a method of drilling efficiently in the soft broken coal seam is explored.
Research on the key technology of narrow split crawler drilling rig
Authors: Pengbo Xu 
Published: March 2021

Abstract
According to the complex construction conditions in China, such as coal mines roadway cross section is small and the space is little, a new type of down hole drill was designed in this paper. In order to improve the mobility under the coal mines, the split type and narrow body structure was adopted in the design drill process, the compact type and more range combined frame with the ability which can construct for more rows level drill holes in the coal roadways and all–round pitching angle drilling in the rock. The industrial test showed that the new type drilling has well application effect in complex conditions with flexible mobility and process adaptability under the coal mines, the workers labor intensity was obviously reduced.
Synthesis and Performance of Presulfided NiMoP/Al2O3-SiO2 Catalyst
Authors: Zhang Jingcheng , Song Guoliang , Hu Yuanming , Yu Haibin , Zhang Guohui , Zhao Peijiang , Huang Jingyuan , Sun Yanmin , Yang Tao , Zhang Yuting , Nan Jun , Zhu Jinjian , Xiao Han , Zhang Shangqiang 
Published: March 2021

Abstract
Presulfided NiMoP/Al2O3-SiO2 catalysts were synthesised. The BET surface area and BJH pore volume gradually decrease with P loading due to the ingress of active phases into the pores of the support. No bulk Ni sulfide phase is observed either in the XRD pattern or in the HRTEM micrographs of all catalysts. The mainly high active center is multilayered Ni-Mo-S type II phase benefited from the weak bond between Al2O3-SiO2 support and active components. The incorporation of phosphorous enhances the dispersion of MoS2 particles and formed more multilayered Ni-Mo-S type II phase. The route of hydrogenation activity increases with the content of P up to 1.2 wt.%, and the route of direct desulfurization activity in the hydrodesulfurization of dibenzothiophene decreases simultaneously. This is attributed to the higher MoS2 stacking number and shorter MoS2 slab length.
A modified inverse method for determining spectral radiative properties of participating medium from normal-hemispherical transmittance and reflectance
Authors: Liu Hua , Chen Xue , Chen Zhongcan , Duan Yanjun , Ren Nan , Wei Caobing , Li Jian , Zhang Xingzhou 
Published: March 2021

Abstract
This paper presents a modified inverse method for retrieving the spectral absorption and transport scattering coefficients of participating medium, the method combines (i) several analytical expressions obtained from the modified two-flux (TF) approximation, (ii) the Monte Carlo (MC) method for predicting normal-hemispherical transmittance Tnh and reflectance Rnh generally obtained from experiments, as well as (iii) an optimization method employing the genetic algorithm (GA). Three types of typical participating medium, the green glass, the low-iron glass, and the silica aerogel with known radiative properties taken form the literatures, were used to illustrate the accuracy and robustness of the modified method by retrieving the input properties from the inverse identification in which the Tnh and Rnh ‘experimental data’ were obtained from the MC predictions. The results show that the modified inverse method was able to retrieve accurately the absorption and transport scattering coefficients of participating medium.
Current situation and Countermeasures of power battery recycling industry in China
Authors: Zou RuiRui , Liu Qian 
Published: March 2021

Abstract
At present, China has entered the stage of centralized decommissioning of power batteries. If the retired power battery can not be effectively recovered, it will pose a serious threat to the ecological environment and public safety. At present, China’s power battery recycling industry has not yet formed a very mature technology line. Against this background, China’s government needs to further strengthen the policy system and standard system, increase support for power battery recycling enterprises, and promote the rapid development of power battery recycling industry.
Research on Development Countermeasures of Prefabricated Buildings in Chongqing Based on SWOT Analysis
Authors: Luo Wenjin , Lei Limei , Guo Yingying , Ren Yunxia 
Published: March 2021

Abstract
The development of prefabricated building is a transformation of the traditional construction mode, a new cut-in point for the sustainable development of the construction industry, and can promote the supply-side structural reform of the construction industry in China. As an important city in the development of the western region, the development and promotion of prefabricated buildings in Chongqing has played an exemplary role for other cities. Therefore, this research provides a certain degree of theoretical exploration and practical application. In this paper, SWOT analysis is used to analyze the advantages, disadvantages, opportunities and challenges of the prefabricated building, and to gain a full understanding of the development conditions of the prefabricated building. On this basis, the paper summarizes the four major constraints on the development of prefabricated building, including policy factors, economic factors, technological factors and industrial factors, and analyzes the weight of these constraints, in view of each restriction factor proposed the corresponding solution countermeasure.
First principle study of the B-site doped double perovskite oxides LaMg0.5M0.5O3 (M=Sc, Ti, Zr)
Authors: Yu Zhou , Mandi Lin , Zemin Zhang 
Published: March 2021

Abstract
The stable configuration of double perovskite LaMgO3 was constructed by CASTEP module in Materials Studio. How the B sites doping (Sc3+, Ti4+, Zr4+) affect the structure and physical properties was theoretical investigated. Three configurations of doping are structural geometry and energy optimized by GGA+WC correlation function, according to the principle of minimum energy, the most stable geometry structure is obtained, based on this structure, the physical properties are calculated. The results show that: The energy of LaMg0.5Ti0.5O3 is the lowest and it is deduced as semiconductor according to the band gap. In the vicinity of Fermi level, the interaction between p-electron and d-electron is obvious, which contributes the most to the density of states. By optical properties simulation, the frequency of absorption peaks of the three materials becomes lower and lower in low frequency range, while the absorption peaks of LaMg0.5Sc0.5O3 and LaMg0.5Zr0.5O3 appear earlier than LaMg0.5Ti0.5O3 in high frequency range, but the peak intensity is lower.