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1.
Mathematical Problems in Engineering ; 2022, 2022.
Article in English | ProQuest Central | ID: covidwho-2194220

##### ABSTRACT

Inspired by the poultry farming process, we studied an input control problem in a two-level supply chain for production-time-dependent products with random demands. Poultry farms deliver chicks in batches, and the raising process begins at timed intervals. Chicks become broilers after a predetermined raising time. The broilers in the process are shipped to manufacturing plants to satisfy the demand. The remaining chicks grow to the next product size to satisfy the demands for larger chickens. This procedure is repeated until the chicks are fully grown. After the chicks are grown to satisfy the demand for the largest size, the remaining chicks are discarded. In this paper, a stochastic model is presented to study an input control problem in the poultry farming process. Because of the production density, feed, and temperature control, one important issue in the operation of a poultry company is the determination of the raising interval and quantity of input (chicks). While existing mathematical models can provide effective information on the production-planning problem of systems, research has not been conducted on cases of random demand. Identifying a recursive structure and Markovian property for the number of raw materials (chicks) and the unfulfilled demand for each product type in the system, we demonstrate that embedded Markov chain models can be obtained. The equilibrium probabilities of the models can be calculated using matrix analytic methods or probability generating functions. Various numerical experiments are conducted to analyze how performance measures such as amount of disposal, unsatisfied demands, and total cost (considering disposal cost and opportunity cost) change with system parameters.

2.
IOP Conference Series. Earth and Environmental Science ; 1114(1):012082, 2022.
Article in English | ProQuest Central | ID: covidwho-2160871

##### ABSTRACT

This study aim to improve the quality of Phyllanthus sp production by increasing the content of secondary metabolites as a bioactive compound. Phyllanthus sp contains various secondary metabolites that enhance immunity and treat diabetes, hypertension, antioxidants, anti-cancer, kidney disorders, and other illnesses. Since the Covid-19 pandemic, Phyllanthus sp widely used as a raw material for making herbal medicines. The trade value of Indonesian herbal medicines is estimated to increase in 2022, and the price will reach around the US \$ 910 million, so it has very bright business prospects. These relatively limited phytopharmaceutical products constrain the supply of high-quality raw materials under the requirements of the herb medicine industry. Therefore, conducting a depth assessment related to efforts to improve the quality of Phyllanthus sp production by increasing the content of secondary metabolites is necessary. The efforts to enhance the quality of Phyllanthus sp as a source of herbal medicine raw materials can be made through plant breeding such as genetic mutations and in combination with the environmental arrangements of soil water content and solar radiation intensity. The efforts to increase the quality of herbal medicine raw materials are critical to support the development of the herbal medicine industry.

3.
IOP Conference Series. Earth and Environmental Science ; 1085(1):012004, 2022.
Article in English | ProQuest Central | ID: covidwho-2051201

##### ABSTRACT

Many educational buildings still do not have proper ventilation systems, are not sustainable in use, and contribute to the spread of Covid-19 viruses. The biggest challenge for the future is to provide attractive, useable, healthy, and sustainable educational buildings in the Netherlands. But is this challenge realistic? Old buildings are usually demolished and replaced by new ones because the government hardly gives any compensation for building renovation or transformation. This leads to the demolition of many school buildings even though the application of new raw materials is not circular and has an impact on our climate and environment. Furthermore, many pre-war buildings are heritage that have a positive impact on neighbourhoods. It is unclear who is responsible for educational buildings, renovation, and financing all the ambitions. The government, the municipality or the school foundation? Problems will soon be exacerbated. At this moment the environmental impact (MilieuPrestatieGebouwen MPG) has no legal base however, this will rapidly change in the age of a circular economy and the upcoming renovation wave. Atelier PRO architects designs many educational buildings and they noticed a change of attitude in conceptualizing educational buildings the last years in the forerunner municipality Amsterdam. Based on these cases and experiences atelier PRO learned their lessons about the ideal renovation towards attractive, healthy and sustainable educational buildings.

4.
Postepy Fitoterapii ; 1:23-32, 2022.
Article in Polish | CAB Abstracts | ID: covidwho-2040622

##### ABSTRACT

COVID-19 is a disease caused by the SARS-CoV-2 virus, multi-organ, with a wide spectrum of symptoms, the most common being pneumonia with fever, dry cough and shortness of breath. There are more and more reports of persistent long-term effects, especially after acute disease. Regardless of the way the virus enters the brain, it attacks neurons, contributing to neurological complications. The main symptoms of the central and peripheral nervous system are dizziness and headaches, impaired consciousness, sometimes acute ischemic stroke and intracranial hemorrhages, loss of taste and smell, visual disturbances, neuralgia and skeletal muscle damage. After recovery, patients experience symptoms such as persistent fatigue, diffuse muscle aches, symptoms of depression, non-renewable sleep, tinnitus, and erectile dysfunction. Early intervention and supportive care at the end of the acute phase of COVID-19 could alleviate the symptoms of the disease as well as prevent their long-term consequences. Taking into account plant raw materials, the standardized extract of Ginkgo leaves (Ginkgo biloba) may be useful at various stages of the disease: it prevents the penetration of the virus into the host cells, has anti-inflammatory, antioxidant and antithrombotic properties, and above all, it is the only plant material with proven neuroprotective and neuroregulatory properties, widely used in the treatment of Alzheimer's, Parkinson's and other diseases and disorders related to the nervous system.

5.
European Transport Research Review ; 14(1), 2022.
Article in English | ProQuest Central | ID: covidwho-2038652

##### ABSTRACT

This study determines the impact of the coronavirus disease (COVID-19) that has been prevalent since the year 2019, on the shipping freights. This task has been undertaken by using the wavelet quantile on the quantile approach. The results of the study affirm that the pandemic has in fact affected the shipping freight costs, primarily due to the lower demand for energy and raw materials, and the unavailability of the vessels. In addition to this, the spread of COVID-19 has had a positive impact on the Baltic Dry Index in the high quantiles and is deemed to be more responsive in the long run. Also, the COVID-19 infection has had a negative effect on the Baltic Dry Tanker Index and the Baltic Clean Tanker Index in the medium to high quantiles, particularly in the short and the medium run. The positive impact of COVID-19 on the Baltic Clean Tanker Index has been recognized in the long term in the high quantiles. These findings support the theoretical model which states that the spread of COVID-19 and the shipping freights are closely related. The results suggest that the degree of the effect is more causal in the short. Therefore, the shipping industry must ideally pay special attention to the detection of abrupt changes in the freight rate dynamics, and the specific regulations regarding these intricacies are critical.

6.
South of Russia: Ecology, Development ; 17(2):76-90, 2022.
Article in Russian | Scopus | ID: covidwho-2025949

##### ABSTRACT

Aim. In vitro analysis of the inhibitory activity of aqueous extracts of ready-made tea compositions and their constituent ingredients on SARS-COV-2 replication. Material and Methods. The laboratory strain SARS-CoV-2/human/RUS/Nsk-FRCFTM-1/2020 was passivated on Vero cell culture. For the preparation of water extracts six types of experimental tea compositions (not containing flavorings) based on black and green tea or flowers of hibiscus as well as individual ingredients were used. Antiviral (inhibitory) activity of plant raw materials was studied in vitro according to the classical scheme of neutralization (inactivation) of the virus. Results. When compared with the main control sample of an aqueous extract of chaga (Inonotus obliquus) with a 50% effective concentration equal to 13.72±2.99 µg/ml against 103 TCPD50/ml of SARS-CoV-2, superior activity was found for extracts of the spice Syzygium aromaticum L. and black tea from Nepal. Approximately equal inhibitory activity was detected for extracts of tea compositions based on black tea with the addition of the grass Thymus altaicus and the spice S. aromaticum L. or with the addition of seeds of Carum carvi L. and the root of Angelica archangelica L. In addition, such activity was detected for extracts of tea compositions based on green tea from China with the addition of leaves of Mentha piperita L. and flowers of Lavandula angustifolia MILL. or with the addition of the peel of Citrus sinensis L. and seeds of Pimpinella anisum L. Extracts from individual plant raw materials used to make tea compositions were black teas from India, Argentina, Vietnam and Sri Lanka, leaves of M. piperita L. and flowers of L. angustifolia MILL. Cetraria islandica lichen, green tea and berries of Oxycoccus also showed antiviral activity. Conclusion. The results obtained suggest that tea compositions based on black and green tea with the addition of various plant raw materials in the form of a regular drink can be useful to people with COVID-19 infection. © 2022 The authors.

7.
Article in Polish | Scopus | ID: covidwho-2025311

##### ABSTRACT

Iron and steel raw materials market evolves rapidly. Global mine production of iron ores and concentrates, metallurgical coal, pig iron and crude steel exceeded 1 billion tonnes at the turn of the 20thand 21stcenturies or in the first 20 years of new millennium. International trade in these fields, as well as trade of such products as coke, ferroalloys and scrap, is also huge. Demand growth rate for steel raw materials, finished and semi-finished steel, and cast iron products is currently the highest among other mineral raw materials. Almost 90% of iron ore supplies come from Australia and Brazil, and the dominant consumer - China - is responsible for almost use. A geographic evolution in the steel production and the consumption of derived products has taken place. China has grown from a secondary crude steel producer and secondary steel products user to a leader with over 50% global share of steel production and a leading exporter of finished products. The iron and steel market has concentrated in the East and South Asia due to high consumption of imported steel raw materials in Japan and South Korea, rapid demand growth in India, investment in energy-efficient scrap processing in Turkey and Iran, while simultaneous reductions in the production capacity of the steel industry in the European Union, former Soviet Union and the US. Market disruption due to Covid-19 pandemic appears to be short-lived, and China has strengthened its position. In the first half of 2021, the prices of steel products increased dramatically, which immediately resulted in the change in prices of apartments and other constructions based on this most widely used metal. © 2022 Polish Geological Institute. All rights reserved.

8.
Sustainability ; 14(17):10862, 2022.
Article in English | ProQuest Central | ID: covidwho-2024206

##### ABSTRACT

The waste generated by small-scale ultra-fresh juice producers, such as bistros and restaurants, has been little studied so far, mainly because it is unevenly distributed and dissipated in the economic ecosystem and would require high costs associated with transportation and subsequent recovery of bio composites. The present article seeks to offer solutions by providing sustainable methods to reduce their waste losses to a minimum and transform them into valuable products, with affordable equipment and techniques. The study focuses on the preliminary phase of quantitative analysis of fruit and vegetable by-products generated on a small scale, the results showing a mean 55% productivity in fresh juices. Due to the high amount of remnant water content in waste, a new process of mechanically pressing the resulting squeezed pulp was introduced, generating an additional yield in juice, ranging from 3.98 to 51.4%. Due to the rising trend in healthier lifestyle, the by-products were frozen or airdried for conservation in each of the processing stages, and the total phenolic compounds and antioxidant activity were analyzed in order to assess the traceability of these bioactive compounds to help maximize their transfer into future final products. The polyphenols transferred into by-products varied between 7 and 23% in pulps and between 6 and 20% in flours. The highest DPPH potential was found in flours, up to three-fold in comparison with the raw material, but the high dry substance content must be accounted for. The results highlight the potential of reusing the processing waste as a reliable source of bioactive compounds.

9.
Remote Sensing ; 14(16):3923, 2022.
Article in English | ProQuest Central | ID: covidwho-2024035

##### ABSTRACT

In a resource-constrained world, there is ongoing concern over the exploitation and potential future shortage of Earth’s natural resources. In this paper, we present the results of two pilot studies in which we used drone technology with spatial mapping tools and environmental and economic analysis to map illegal waste sites. Besides the technical feasibility, we aimed at understanding the benefits, costs, and tradeoffs of extracting the materials stocked therein, transforming illegal waste sites into valuable resources. The innovation of our work is reflected in the integration of existing technologies for aerial mapping and economic\environmental assessment methodologies for promoting a local circular economy. The pilot results suggest that it is feasible to identify valuable materials left on the ground in the form of unattended, illegally disposed waste. Our initial national estimates for the illegal waste cleanup based on the pilot results suggest that the treatment cost in Israel can be reduced by 58 million USD and even reach zero, with the potential to generate up to 82.8 million USD profits. Finally, we link our results to the Sustainable Development Goals framework and suggest how mapping and implementing the recycling potential can promote achieving some of the goals. Our work provides missing data that the state, local authorities, contractors, and companies that monitor and manage waste and recycled raw materials may find useful.

10.
Mathematics ; 10(16):2911, 2022.
Article in English | ProQuest Central | ID: covidwho-2023880

##### ABSTRACT

Determining success factors for managing supply chains is a relevant aspect for companies. Then, modeling the relationship between inventory cost savings and supply chain success factors is a route for stating such a determination. This is particularly important in pharmacies and food nutrition services (FNS), where the advances made on this topic are still scarce. In this article, we propose and formulate a robust compromise (RoCo) multi-criteria model based on non-linear programming and time-dependent demand. The novelty of our proposal is in defining a score that allows us to measure the mentioned success factors in a simple way, in meeting together all three elements (RoCo multi-criteria, non-linear programming, and time-dependent demand) to state a new model, and in applying it to pharmacies and FNS. This model relates inventory cost savings for pharmacy/FNS and success factors across their supply chains. Savings of inventory costs are predicted by lot sizes to be purchased and computed by comparing optimal and true inventory costs. We utilize a system that records the movements and costs of products to collect the data. Factors, such as purchasing organization, economies of scale, and synchronized supply, are assumed using the purchase system, with these factors ranked on a Likert scale. We consider multilevel relationships between savings obtained for 79 pharmacy/FNS products, and success factor scores according to these products. To deal with the endogeneity bias of the relationships proposed, internal instrumental variables are employed by utilizing generalized statistical moments. Among our main conclusions, we state that the greatest cost savings obtained from inventory models are directly associated with low-success supply chain factors. In this association, the success factors operate as endogenous variables, with respect to inventory cost savings, given the simultaneity of their relationship with cost savings when inventory decision-making.

11.
Atmosphere ; 13(8):1231, 2022.
Article in English | ProQuest Central | ID: covidwho-2023116

##### ABSTRACT

Brick kilns add enormous quantities of organic pollutants to the air that can cause serious health issues, especially in developing countries;poor air quality is associated with community health problems, yet receives no attention in Northern Pakistan. The present study, therefore, assessed the chemical composition and investigated the impacts of air pollution from brick kilns on public health. A field-based investigation of air pollutants, i.e., PM1, PM2.5 and PM10, CO2, CO, NO, NO2, H2S, and NH3 using mobile scientific instruments was conducted in selected study area locations. Social surveys were conducted to investigate the impacts of air pollution on community health. The results reveal the highest concentrations of PM1, PM2.5, and PM10, i.e., 3377, 2305, and 3567.67 µg/m3, respectively, in specific locations. Particulate matter concentrations in sampling points exceeded the permissible limits of the Pakistan National Environmental Quality Standard and, therefore, may risk the local population’s health. The highest mean value of CO2 was 529 mg/L, and other parameters, such as CO, NO, NO2, H2S, and NH3 were within the normal range. The social survey’s findings reveal that particulate matter was directly associated with respiratory diseases such as asthma, which was reported in all age groups selected for sampling. The study concluded by implementing air pollution reduction measures in brick kiln industries to protect the environment and community health. In addition, the region’s environmental protection agency needs to play an active role in proper checking and integrated management to improve air quality and protect the community from air hazards.

12.
Agriculture ; 12(8):1221, 2022.
Article in English | ProQuest Central | ID: covidwho-2023053

##### ABSTRACT

The purpose of this study is to examine and compare different psychological and sociodemographic factors for contracting sweet potato production for farmers with different statuses based upon the theory of planned behavior (TPB). Sustainable production provides contract owners with a sufficient amount of both food crops and a source of bioethanol clean energy. The impact of such factors on potential farmers based on the TPB for a particular contract type is estimated with the data collected in three major sweet potato production cities/counties in Taiwan through the probit model and multinomial logit model. The average size of the surveyed farms is 1.64 ha. The results consistently show that the factors of attitude toward the advantages of contract farming, subjective norms regarding contract farming, perceived contract farming control, and behavior intention have very significant impacts on the selection of contract farming types for professional farmers and brokers. These results indicate that the contract owners will gain the greatest advantage through commanding any factor in TBP for these two groups of farmers, as they have an incentive to manage the sources of sweet potatoes at the best conditions before they have the agreement with the contract owners, either as the supply of bioethanol energy raw materials, supply of food crops, or supply of food processing materials.

13.
IOP Conference Series. Earth and Environmental Science ; 1057(1):012007, 2022.
Article in English | ProQuest Central | ID: covidwho-2017612

##### ABSTRACT

Soaps are used widely by humans in many aspects. Exclusively, the emergence of the SARS-Cov-2 virus made people wash their hands frequently to disinfect the virus to prevent virus infection. Soaps made of herbals possess constituents that goodness the skin as well to rejuvenate the mind and body factors. Dried leaves of Basil, Neem and Acalypha Indica, Aloe vera, and Hibiscus flower are used here to prepare homemade soap. The steam distillation process is an imperative process by which the oils are used from raw materials like dried leaves for the preparation of soaps. Extracts obtained from the herbal plants are used as additives in the preparation of soap that would be added besides the lye and other constituents. Lye preferred here is Sodium Hydroxide (NaOH) and the cast shapes utilized here in determining the soap shape are Elliptic and Rectangle. pH value, the total fatty matter is determined using respective methodologies, and the materials used in the preparation of soap are estimated using the accessible software called SoapCalc Recipe Calculator. Soaps made using the mentioned ingredients are safe and robust for cleaning the skin and hands.

14.
Proceedings of the International Conference on Business Excellence ; 16(1):1122-1132, 2022.
Article in English | Web of Science | ID: covidwho-1997419

##### ABSTRACT

This paper's objective is to present a comprehensive view on the evolution of main raw materials used by European manufacturers from technical and construction fields (ferrous metals, non-ferrous, polymers and timber) over the last 2 years described by high volatility. This topic is particularly relevant nowadays since raw materials shortages put the ongoing economic recovery under pressure. The value added of this analysis consists in a clear picture of the disruptions triggered by the ongoing sanitary crisis on construction raw materials market since spring 2020. For companies, raw materials control is a mandatory purpose to keep under control direct cost of production and stay competitive. Obviously, all manufactures were affected by this market volatility but some of them have been more resilient to shocks and managed to perform better than others. Therefore, they obtained a competitive advantage based on their agility on sourcing and controlling the supply of their main raw materials. Besides capturing the trends of main raw materials on the European market, this paper includes a practical guideline that might be considered by decision makers to tame the impact of raw materials volatility on their performance and help them to boost their resilience and agility to obtain a competitive advantage.

15.
Sustainability ; 14(15):8984, 2022.
Article in English | ProQuest Central | ID: covidwho-1994146

##### ABSTRACT

The main topics of this Special Issue include the following: (i) building management, (ii) building costs, (iii) mass appraisal methods, (iv) econometric models, (v) real estate risk management, (vi) economic valuation of real estate investment projects, (vii) real estate market, (viii) social housing, (ix) urban economics, (x) land, (xi) transport economics, (xii) real estate economics and finance, (xiii) sustainable building transformations and economic effects on environment, (xiv) green buildings, (xv) resilient cities, (xvi) COVID-19 pandemic and (xvii) Environmental, Social and Governance (ESG). [...]the universities or research institutes affiliations to which the Authors belong are distributed throughout the world: in the Europe the authors come from Spain, France, Portugal, Netherland, Germany, Belgium, United Kingdom, Poland, and Hungary;in Asia from China, Korea, Russia, Malaysia, and United Arab Emirates;in South America from Colombia and Chile;in Africa from Ghana;and in Oceania from Australia. In particular, in the study the central role played by public-private partnership (PPP) to combine the competencies of the public sector and both the financial and managerial commitment of the private entities in the process of delivering infrastructure, to fulfilling social and economic needs, to rise the quality of life, and to support sustainable development, is recognized and, then, a conceptual model for the identification and classification of stakeholders in this projects typology, is developed and tested [5]. By selecting a single-story 3D-printed house in the United Arab Emirates, the authors implement the life cycle assessment (LCA) framework to quantify the environmental loads of raw materials extraction and manufacturing, as well as energy consumption during construction and operation phases;the authors also identify the economics of the selected structural systems through life cycle costing analysis (LCCA).

16.
Applied Sciences ; 12(15):7586, 2022.
Article in English | ProQuest Central | ID: covidwho-1993926

##### ABSTRACT

Eastern Indonesia, including the island of Halmahera, is a region with a high mineral potential, particularly Ni-Co, Au-Cu, and Ag ores, which are a globally important and critical source of raw materials (CRMs). The research was conducted within the framework of scientific cooperation between the Faculty of Geology, University of Warsaw (Poland), and PT Halmahera Resources Percasa Ltd. (Jakarta, Indonesia) Between the years of 2009 and 2011, 42 boreholes were drilled using an impact system (up to 15 m below surface) and 3 test pits (up to 8 m below surface). The presence of a laterite deposit containing Ni-Co mineralization was identified on the license area. The resources estimated in accordance with JORC Code, with a cut-off grade Ni ≥ 0.5%, equaling 185,510 t Ni and 17,747 t Co, with the stock of raw material amounting to 14.8 million t and with an average content of 1.00% Ni and 0.13% Co. The ore in the deposit has mixed character. To date, studies have shown the dominance of oxide ore, but saprolite composed of magnesium silicates was also identified in significant amount. The Ni mineralization in oxide ore (limonite) is bound to goethite and manganese minerals, while in the case of silicate (saprolite) ore, it occurs locally in the form of veins as well as zonally in the weathered serpentinites. Cobalt mineralization is almost entirely related to the Mn minerals that occur in the lower oxide zone. It has been found that both serpentinites and harzburgites (and possibly locally lherzolite) are the parent rocks for laterite deposit.

17.
Acta Montanistica Slovaca ; 27(2):395-406, 2022.
Article in English | Scopus | ID: covidwho-1989063

##### ABSTRACT

Mining and processing of raw materials are at the beginning of all industrial value chains. As global demand for raw materials grows, basic raw materials will continue to play a key role. Global value chains have become a dominant feature of world trade. The process of production of goods from raw materials to the finished product, intended for the final consumer, is carried out primarily where the necessary professional and material prerequisites are available, at competitive costs and quality. Although the EU has a long tradition of mining and processing raw materials, as well as rich reserves of aggregates and non-metallic minerals, some metals such as copper and zinc, but also some critical raw materials. However, their use is not optimal for various reasons, such as insufficient investment in geological exploration and extraction, diverse and lengthy national permitting procedures, or low public acceptance. Shortcomings in the EU's mining, processing, recycling, refining and unbundling capacity (e.g. in the case of lithium or rare earths) reflect a lack of resilience and high dependence on supplies from other parts of the world. At the same time, the crisis caused by the COVID-19 pandemic may have an impact on the further direction of industrial policy with an effort to increase diversification and regionalization of production processes, resp. gaining economic sovereignty in strategic areas. Raw materials form the basis of the European economy in order to secure jobs and competitiveness and are essential for maintaining and improving our quality of life. Ensuring reliable, sustainable and unhindered access to and circulation of raw materials in the economy is therefore a growing concern within the EU, not only regionally but also globally. It is for these reasons that it is necessary to examine the consumption of materials in relation to the stage of development of countries. © 2022, Technical University of Kosice. All rights reserved.

18.
Gornyi Zhurnal ; 2022(6):91-96, 2022.
Article in Russian | Scopus | ID: covidwho-1988673

##### ABSTRACT

Marketing of iron ore products under the COVID-19 pandemic conditions became a robustness test for the metallurgy sector and the whole global economy. Most of the countries imposed various restrictions on the frontier crossing and business activities, the industrial scheduling and freight flows were essentially revised, and the supply and demand for goods and raw materials was accordingly restructured. The raised social expenditures in many countries resulted in higher issues of banknotes by central banks. The commodity markets experienced alternating price behavior of basic materials. Staring from the second half of 2020, the deferred demand for metal grew gradually, which entailed the additional requirement of the raw material and the rising prices quotes. In 2021, including recovery of metallurgy industry, the iron ore prices on the world markets continued rising. In the conditions of periodically shut-off paths of supplies (mostly because of the pandemic) and under varying demand for mineral raw materials, Lebedinsky GOK maintained its production capacity utilization and remained present on all critical markets. To this effect, Lebedinsky GOK improved the range of products, flexibly changed sales and logistics depending on the market situation, closely cooperated with all production units within the Metalloinvest Group and preserved the yield of iron ore and hot briquetted iron (HBI). Within a short term, Lebedinsky GOK successfully tuned up production of premium quality pellets, which was internationally appreciated, as well as increased production of re-enriched concentrate and its shipment to Mikhailovsky GOK for manufacturing higher quality pellets in the framework of economic cooperation at the Metalloinvest Group of Companies. In the period of the pandemic, Lebedinsky GOK successfully maintained stable iron ore production and shipment at the effective healthcare and health protection. © 2022, Ore and Metals Publishing house. All rights reserved.

19.
Revista FSA ; 19(8):102-121, 2022.
Article in Portuguese | Academic Search Complete | ID: covidwho-1975387