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To determine the strategic directions of development of the woodworking industry of the country, a structural-logical scheme of scientific research is proposed, which includes the following stages: identification of the main substantive determinants of ensuring the development of the woodworking industry of the countries over the world; assessment of raw material potential and competitiveness of the woodworking industry of the world countries; modeling the impact of raw materials potential on the competitiveness of the woodworking industry in the countries of the world; determination of priority directions of development of the woodworking industry of these countries. An integral assessment of the raw material potential of the woodworking industry of the world countries was carried out by the following components: forest cover of the territory, reserves of the forest stand, the total volume of wood production, the volume of production of business wood, which made it possible to determine the level and disproportions of the development of raw materials for the woodworking industry of the countries of the world. According to the value of the integral indicator of the raw material potential of the woodworking industry in 2020, from 36 countries chosen, Finland, Canada, Sweden, Latvia, Estonia were included in countries with a high level of raw material potential of the woodworking industry, while the countries with the lowest level were Greece, Mexico, Italy, China, the Netherlands, and Ukraine. The level of competitiveness of the woodworking industry of Ukraine and the world countries is assessed. The leading countries in terms of competitiveness of the woodworking industry in 2020 included Brazil, Russia, Ukraine, Canada, Finland, while the countries with a low level of competitiveness of the woodworking industry included the Netherlands, Greece, Great Britain, Korea, Japan, and Italy. The carried out analysis allows to recommend for the group of leading countries in terms of competitiveness of the woodworking industry (including Ukraine) to focus on increasing exports of woodworking goods with high added value, such as sheet wood materials. A modeling of the influence of raw material potential on the level of competitiveness of the woodworking industry of the world countries is fulfilled. It is determined that the strategic directions of development of the woodworking industry of the countries of the world are to increase the output of products with high added value and the introduction of measures for the rational use of forest resources.

World experience in the creating of clusters in different industries has shown their effectiveness. This paper investigated the resource potential for creating a cluster designed for wood processing and to process wood waste from the timber industry of the Krasnoyarsk Territory of Russia. Static indicators were assessed, representing a quantitative characteristic of forest raw material resources: total and operational reserves of wood available in the region. While studying the state and use of forest resources, significant reserves of forest resources and secondary raw materials were revealed. Main indicators of the forest industry of the region over recent years were analyzed. The main systemic issues hindering the development of the timber industry were exposed. It was concluded that the region has raw material potential and industrial infrastructure necessary for the formation and sustainable development of a cluster for processing waste from the timber industry. Analysis of the producers and harvesters of forest products’ locations revealed potential wood industry clusters, and areas suitable for cluster economic development were proposed. The average figures of the nearest neighbor were used and analyzed to examine the spatial distribution of raw material harvesters and enterprises that produce finished products with respect to transport infrastructure, staffing, and raw material availability.

World experience in the creating of clusters in different industries has shown their effectiveness. This paper investigated the resource potential for creating a cluster designed for wood processing and to process wood waste from the timber industry of the Krasnoyarsk Territory of Russia. Static indicators were assessed, representing a quantitative characteristic of forest raw material resources: total and operational reserves of wood available in the region. While studying the state and use of forest resources, significant reserves of forest resources and secondary raw materials were revealed. Main indicators of the forest industry of the region over recent years were analyzed. The main systemic issues hindering the development of the timber industry were exposed. It was concluded that the region has raw material potential and industrial infrastructure necessary for the formation and sustainable development of a cluster for processing waste from the timber industry. Analysis of the producers and harvesters of forest products’ locations revealed potential wood industry clusters, and areas suitable for cluster economic development were proposed. The average figures of the nearest neighbor were used and analyzed to examine the spatial distribution of raw material harvesters and enterprises that produce finished products with respect to transport infrastructure, staffing, and raw material availability.

The Adria region which includes the countries of: Albania, Bosnia and Herzegovina, Croatia, Montenegro, North Macedonia, and Serbia, and corresponds to the Dinarides, northwesternmost Hellenides, and the Vardar zone, has a long history of mining. Here, the main strengths and challenges of the mineral sector of the Adria region were assessed using the following methodology: (1) presentation of the current status of mineral exploration and exploitation, (2) SWOT (Strengths, Weaknesses, Opportunities, Threats) analysis on parameters including geological potential, economic environment, legal and regulatory framework, innovation and technology framework, environmental protection and land use planning, governmental and social potential, human resources and educational potential, (3) Gap analysis, and (4) integration of the results obtained in the development of a roadmap for the actions required to promote investments in the mineral sector in the Adria region. The main strengths of the regional mineral sector include the significant mineral potential due to a favourable geological setting, significant reserves, a long mining tradition, and active exploration areas, as well as a significant number of active and abundant mines and the availability of secondary raw materials. Nevertheless, there are many challenges that the mineral sector faces, such as difficulties in ensuring social acceptance, a lack of new exploration campaigns in many areas, estimation of resources or reserves that do not follow international codes and standards, regulations related to environmental issues in the mineral sector of Adria countries that do not comply with European legislation, and the limited availability of qualified technical, scientific and managerial personnel involved in the whole mineral cycle. Therefore, actions and measures such as awareness campaigns to highlight the significance of Raw Materials in the sustainable development of the region, further exploration, reserves calculation in alignment with internationally recognized codes, harmonization with spatial plans, and reforms to attract investors and capacity building programs should be taken for further development of the Adria region’s mineral sector in a sustainable manner.

This article is dedicated to the current problem of forming the Eastern vector of oil and gas policy within new energy policy and modern circumstances. The main goal of the work is to study the energy relations between Russia and the countries of the Asia-Pacific region, namely China. Using the analysis method, authors have highlighted the threats and possibilities of the influence of the current situation in the fuel and energy complex on Russia's energy security. Analysis of the existing situation on the global energy market has revealed that deepening and expansion of partnerships in economic and energy sphere with China are of interest to Russia as a Eurasian state. The basis for a partnership is a cooperation, based on China’s demand for natural resources, while Russia will benefit from using effective innovation models of modernisation.

Incorporation of fluoroalkyl motifs in pharmaceuticals can enhance the therapeutic profiles of the parent molecules. The hydrofluoroalkylation of alkenes has emerged as a promising route to diverse fluoroalkylated compounds; however, current methods require superstoichiometric oxidants, expensive/oxidative fluoroalkylating reagents and precious metals, and often exhibit limited scope, making a universal protocol that addresses these limitations highly desirable. Here we report the hydrofluoroalkylation of alkenes with cheap, abundant and available fluoroalkyl carboxylic acids as the sole reagents. Hydrotrifluoro-, difluoro-, monofluoro- and perfluoroalkylation are all demonstrated, with broad scope, mild conditions (redox neutral) and potential for late-stage modification of bioactive molecules. Critical to success is overcoming the exceedingly high redox potential of feedstock fluoroalkyl carboxylic acids such as trifluoroacetic acid by leveraging cooperative earth-abundant, inexpensive iron and redox-active thiol catalysis, enabling these reagents to be directly used as hydroperfluoroalkylation donors without pre-activation. Preliminary mechanistic studies support the radical nature of this cooperative process.Alkene hydrofluoroalkylation offers a promising route to diverse fluoroalkylated compounds but current methods have limitations, such as needing expensive fluoroalkylating reagents. Now, leveraging iron photocatalysis and hydrogen-atom-transfer catalysis, a hydrofluoroalkylation method has been developed that utilizes feedstock chemicals such as trifluoroacetic acid as direct fluoroalkyl radical precursors, providing a redox-neutral, general protocol to introduce fluoroalkyl moieties.

Graphite powder as a raw material for the production of graphene by electrochemical exfoliation is superior to bulk graphite in terms of cost-effectiveness and manufacturing process. However, the current technology is still in its infancy and lacks preliminary systematic research. Therefore, there is a blank in the theoretical basis for process optimization and production regulation. Here, the effects of the main process parameters including graphite powder category, electric field driving force, electrolyte type, and corresponding concentration were systematically investigated on the electrochemical exfoliation and graphene quality. Expanded graphite powder with flake structure, regular graphite layer arrangement, and large graphite layer spacing is superior to natural flake graphite powder and artificial graphite powder for the electrochemical exfoliation to produce graphene. Sulfate ion with large ionic radius is best suitable for intercalation and subsequent expansion to obtain a high graphene yield and a low I D / I G in graphene in aqueous solution. For graphite powder as raw material, there exist optimal values for both electrolyte concentration and driving voltage for graphene production. A high graphene yield of 42.5% with low defect density ( I D / I G  = 0.14–1.43) and oxygen content of 30.54% can be obtained using Na 2 SO 4 at a concentration of 0.1 M at a voltage of 10 V for 4 h. The process optimization and regulation and corresponding influencing mechanisms of process parameters revealed here will provide guidance for the further development of graphene production by electrochemical exfoliation of graphite powder.

Nanocelluloses are highly interesting structures due to a variety of inherent properties, such as high surface area and porosity; hence, there is a need to investigate new sources of raw materials for their production. From this perspective, this paper presents a study on the obtainment of nanocelluloses from the cashew apple bagasse by evaluating the influence of the biomass pretreatment on the properties of the obtained structures. The cashew apple bagasse (CAB) was previously submitted to alkaline and acid–alkali pretreatments and the solid named CAB-PTA and CAB-PT-HA, respectively. The nanocellulosic fractions were obtained by hydrolysis using sulfuric acid combined with an ultrasonic treatment under different reaction times (1 h and 5 h). The highest nanocellulose yield was achieved using CAB-PT-HA, and the nanocrystals were rod-shaped and presented diameters of 30 to 40 nm. In the production of nanocelluloses using CAB-PTA, reaction time influenced the shape and size of the nanostructures, and the chemical composition analysis indicated the presence of residual lignin in those structures, which showed higher thermal stability. All obtained nanocelluloses presented zeta potentials greater than 30 mV in absolute values, indicating stable suspensions. Thus, this study can confirm the feasibility of the use of CAB as a novel renewable source for producing cellulose nanocrystals that possess great potential to be used as valuable biomaterials to this end.

Lignocellulose based nanomaterials are emerging green biosolids commonly obtained from wood pulp. Alternative feedstocks, such as as unavoidable food waste, are interesting resources for nano/microfibers. This research reports the production and characterization of microfibrillated lignocellulose (MFLC) from cassava peel (CP) and almond hull (AH) via acid-free microwave-assisted hydrothermal treatment (MHT) at different temperatures (120–220 °C). During processing, the structural changes were tracked by ATR-IR, TGA, XRD, 13C CPMAS NMR, zeta potential, HPLC, elemental analysis (CHN; carbon, hydrogen and nitrogen), TEM and SEM analyses. The microwave processing temperature and nature of feedstock exerted a significant influence on the yields and properties of the MFLCs produced. The MFLC yields from CP and AH shifted by 15–49% and 31–73%, respectively. Increasing the MHT temperature substantially affected the crystallinity index (13–66% for CP and 36–62% for AH) and thermal stability (300–374 °C for CP and 300–364 °C for AH) of the MFLCs produced. This suggested that the MFLC from CP is more fragile and brittle than that produced from AH. These phenomena influenced the gelation capabilities of the fibers. AH MFLC pretreated with ethanol at low temperature gave better film-forming capabilities, while untreated and heptane pretreated materials formed stable hydrogels at solid concentration (2% w/v). At high processing temperatures, the microfibrils were separated into elementary fibers, regardless of pretreatment or feedstock type. Given these data, this work demonstrates that the acid-free MHT processing of CP and AH is a facile method for producing MFLC with potential applications, including adsorption, packaging and the production of nanocomposites and personal care rheology modifiers.Graphic abstract

The system Zn 1-x Mn x Fe 2 O 4 ( x  = 0, 2, and 4%) was prepared by sol–gel chemical route at 80 °C. X-Ray powder diffraction and Raman spectrum analysis were used to determine the preliminary phase of obtained samples. W–H and SSP plots were used to determine the crystallite size and micro-strain of samples. The surface charge and morphology of the samples were studied using zeta potential and scanning electron microscope analysis, respectively. The optical bandgap of the samples suggested that they were semiconducting. The dielectric characteristics of samples were examined as a function of temperature (60–600 °C) at various frequencies (1 kHz, 10 kHz, 100 kHz, and 1 MHz). The presence of interfacial and orientational polarization was indicated by dielectric constant and dissipation factor studies, which ranged from (0.7–460) to (0.3–0.8) with Mn and were found thermally stable up to 300 °C. The thermal dependence of DC conductivity demonstrates Arrhenius type transport with one, two, and three regions of conduction in sample ZF-0, ZF-2, and ZF-4 respectively. The sources of charge carriers in samples were V o · · , e ′ and dipole defects V o · · - 2 F e F e 3 + 2 + ′ / 2 M n Z n 2 + 3 + . - 2 F e F e 3 + 2 + ′ . The current work could help to identify the possible applications in semiconductor devices, thermally stable capacitors, and as mixed ionic electronic conductors in solid oxide fuel cells.