cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.20278248
title: Magnetic concentration route for recovering pellet feed fines stored in a mining dam

description: Abstract The greatest and noblest challenge of mining engineering for the present and the future of iron ore treatment could be considered as the pursuit of optimizing the use of mineral resources. The use of mining tailings, in the mineral sector itself, or in another industrial branch, meets the needs of circular economy as it increases the useful service life of this material. In order to investigate this scenario, a technological characterization of a sample from a tailings dam was carried out along with magnetic concentration tests in a Wet High-Intensity Magnetic Separator (WHIMS) to propose a possible concentration route. In relation to the characterization itself, the results demonstrated a relative density of 3.04 x 103 Kg/m3and an average superficial specific area of 3.75 cm3/g. The granulometric analysis classified the material as fine, with d90 of 0.110 mm and d50 ≅ 0.049 mm. Quartz, hematite, goethite, kaolinite and manganese oxide were identified in the sample. The test which presented the best results (66.83% Fe and 1.74% SiO2) consisted of the Rougher, Cleaner and Recleaner phases, using a 1.5 mm grooved GAP matrix, a 7,000 Gauss magnetic field, 30% solids, and water pressure at 0.5 kgf/cm2 (49.0 x 103 Pa). Finally, the conclusive results indicate that the studied material can be concentrated through magnetic concentration, keeping in mind the specifications concerning the pellet feed fines commercial product. Besides the financial gain, the activity prolongs the durability of the tailings dam and reduces the environmental impacts associated with these structures.
DOI: 10.6084/m9.figshare.20278248.v1
title: Magnetic concentration route for recovering pellet feed fines stored in a mining dam

description: Abstract The greatest and noblest challenge of mining engineering for the present and the future of iron ore treatment could be considered as the pursuit of optimizing the use of mineral resources. The use of mining tailings, in the mineral sector itself, or in another industrial branch, meets the needs of circular economy as it increases the useful service life of this material. In order to investigate this scenario, a technological characterization of a sample from a tailings dam was carried out along with magnetic concentration tests in a Wet High-Intensity Magnetic Separator (WHIMS) to propose a possible concentration route. In relation to the characterization itself, the results demonstrated a relative density of 3.04 x 103 Kg/m3and an average superficial specific area of 3.75 cm3/g. The granulometric analysis classified the material as fine, with d90 of 0.110 mm and d50 ≅ 0.049 mm. Quartz, hematite, goethite, kaolinite and manganese oxide were identified in the sample. The test which presented the best results (66.83% Fe and 1.74% SiO2) consisted of the Rougher, Cleaner and Recleaner phases, using a 1.5 mm grooved GAP matrix, a 7,000 Gauss magnetic field, 30% solids, and water pressure at 0.5 kgf/cm2 (49.0 x 103 Pa). Finally, the conclusive results indicate that the studied material can be concentrated through magnetic concentration, keeping in mind the specifications concerning the pellet feed fines commercial product. Besides the financial gain, the activity prolongs the durability of the tailings dam and reduces the environmental impacts associated with these structures.
DOI: 10.6084/m9.figshare.20278249
title: Retrospective evalution of non-fatty solids in samples of raw milk in the state of Rio Grande do Sul according to season, Brazil

description: ABSTRACT: The present study described the chemical composition and somatic cell score (SCS) of samples of refrigerated raw milk collected from commercial farms in the state of Rio Grande do Sul in order to better understand the behavior of constituents present in non-fatty solids (NFS) in milk according to the season of the year. Means were used to describe statistical data. To estimate the probability of NFS levels meeting IN 76 (BRAZIL, 2018), binary logistic regression was used. It was reported that 18.2% (233.817) of analytical results showed NFS below 8.4%, representing the minimum required by IN 76. The highest average NFS level observed in the five-year period was registered in the micro-region of Passo Fundo (8.70%) in winter. The microregion with the lowest results was Porto Alegre (8.53%); however, it still demonstrated levels within the limits established by IN 76. The study indicates that milk constituents show differences between seasons. In autumn and winter, the constituents remained equal to or higher than those required by current legislation, while spring and summer were the periods with the lowest NFS values. The SCS was also influenced by the seasons, with the highest rates in spring, summer, and autumn.
DOI: 10.6084/m9.figshare.20278249.v1
title: Retrospective evalution of non-fatty solids in samples of raw milk in the state of Rio Grande do Sul according to season, Brazil

description: ABSTRACT: The present study described the chemical composition and somatic cell score (SCS) of samples of refrigerated raw milk collected from commercial farms in the state of Rio Grande do Sul in order to better understand the behavior of constituents present in non-fatty solids (NFS) in milk according to the season of the year. Means were used to describe statistical data. To estimate the probability of NFS levels meeting IN 76 (BRAZIL, 2018), binary logistic regression was used. It was reported that 18.2% (233.817) of analytical results showed NFS below 8.4%, representing the minimum required by IN 76. The highest average NFS level observed in the five-year period was registered in the micro-region of Passo Fundo (8.70%) in winter. The microregion with the lowest results was Porto Alegre (8.53%); however, it still demonstrated levels within the limits established by IN 76. The study indicates that milk constituents show differences between seasons. In autumn and winter, the constituents remained equal to or higher than those required by current legislation, while spring and summer were the periods with the lowest NFS values. The SCS was also influenced by the seasons, with the highest rates in spring, summer, and autumn.
DOI: 10.6084/m9.figshare.20278251
title: Child labor facing consolidation in Brazil, Argentina and Uruguay from ratifications of international conventions

description: Abstract The paper main objective is to analyze the converging points that demonstrate the importance of consolidating the process of eradicating child labor in Brazil, Argentina and Uruguay, based on ratifications of international conventions. The technique of bibliographical research was used. The method of approach is the deductive and the monographic procedure was used. It was found that the ratifications of international conventions were milestones in the fight against child labor in Brazil, Argentina and Uruguay. As a result, legal protections against child labor have been structured to guide the execution of public policy.
DOI: 10.6084/m9.figshare.20278251.v1
title: Child labor facing consolidation in Brazil, Argentina and Uruguay from ratifications of international conventions

description: Abstract The paper main objective is to analyze the converging points that demonstrate the importance of consolidating the process of eradicating child labor in Brazil, Argentina and Uruguay, based on ratifications of international conventions. The technique of bibliographical research was used. The method of approach is the deductive and the monographic procedure was used. It was found that the ratifications of international conventions were milestones in the fight against child labor in Brazil, Argentina and Uruguay. As a result, legal protections against child labor have been structured to guide the execution of public policy.
DOI: 10.6084/m9.figshare.20278254
title: Quantification of chlorophyll fluorescence in soybean seeds by multispectral images and their relationship with physiological potential

description: Abstract: The multispectral image analysis technique to detect chlorophyll fluorescence (CF) in soybean seeds was studied to assess the relationship between CF signals and seed physiological potential. Eight treatments, corresponding to 0%, 2%, 4%, 6%, 8%, 10%, 12%, and 14% green seeds, were used on two cultivars, BMX Desafio RR 8473 RSF and 96R10 IPRO, which passed through different seed quality tests. Initially, the CF of the seeds was determined using 660 nm and 730 nm spectra, and then the germination, electrical conductivity, accelerated aging with saturated NaCl solution, tetrazolium, and computerized seedling image analysis (Vigor-S) tests were performed on the same seeds. A completely randomized design was used, as well as replications of each treatment. Analysis of variance (ANOVA) was performed on the data from germination, vigor, and CF tests using the R® software, and the means were grouped by the Scott-Knott test (p ≤ 0.05). Pearson’s linear correlation coefficients (r) were calculated for all combinations among the evaluations with significance of the r values determined by the t-test (p ≤ 0.05), and multivariate analysis of the principal components was performed. Proportional increases in green seeds contribute to an increase in chlorophyll fluorescence signals and have a negative correlation with seed physiological quality; levels above 4% green seeds in the samples result in marked losses in physiological potential. Therefore, the chlorophyll fluorescence detected through multispectral images is inversely related to the physiological potential of soybean seeds.
DOI: 10.6084/m9.figshare.20278254.v1
title: Quantification of chlorophyll fluorescence in soybean seeds by multispectral images and their relationship with physiological potential

description: Abstract: The multispectral image analysis technique to detect chlorophyll fluorescence (CF) in soybean seeds was studied to assess the relationship between CF signals and seed physiological potential. Eight treatments, corresponding to 0%, 2%, 4%, 6%, 8%, 10%, 12%, and 14% green seeds, were used on two cultivars, BMX Desafio RR 8473 RSF and 96R10 IPRO, which passed through different seed quality tests. Initially, the CF of the seeds was determined using 660 nm and 730 nm spectra, and then the germination, electrical conductivity, accelerated aging with saturated NaCl solution, tetrazolium, and computerized seedling image analysis (Vigor-S) tests were performed on the same seeds. A completely randomized design was used, as well as replications of each treatment. Analysis of variance (ANOVA) was performed on the data from germination, vigor, and CF tests using the R® software, and the means were grouped by the Scott-Knott test (p ≤ 0.05). Pearson’s linear correlation coefficients (r) were calculated for all combinations among the evaluations with significance of the r values determined by the t-test (p ≤ 0.05), and multivariate analysis of the principal components was performed. Proportional increases in green seeds contribute to an increase in chlorophyll fluorescence signals and have a negative correlation with seed physiological quality; levels above 4% green seeds in the samples result in marked losses in physiological potential. Therefore, the chlorophyll fluorescence detected through multispectral images is inversely related to the physiological potential of soybean seeds.
DOI: 10.6084/m9.figshare.20278257
title: Price trends of Agave Mezcalero in Mexico using multiple linear regression models

description: ABSTRACT: This study developed a multiple linear regression model to estimate the Average rural prices (ARP) in Mexico with information taken from the period 1999-2018. The variables used to generate this model were the supply and demand as represented by planted area, yield, exports and the ARP of Agave Tequilero and Mezcalero. The analysis was carried out through the multiple linear regression model (MLRM) with the least squares method and using the statistical package R. The following variables were identified as having a significant influence on the determination of the ARP: the yield of Agave Mezcalero (YAM), the ARP of Agave Tequilero and the new planted area of Agave Tequilero (NPAATt-6) with an adjustment of 6 periods. Overall, three models were generated: model 2 was considered the most appropriate because it allows carrying out future forecasts with the new planted area with Agave Tequilero with 2 independent variables. YAM and NPAATt-6 were useful in predicting 65.5% of the annual variations in the ARP and helped recognize the negative trend of the Agave price from 2020 to 2024. Therefore, the use of the MLRM to estimate the Agave ARP can be a useful tool in predicting the performance of this crop.
DOI: 10.6084/m9.figshare.20278257.v1
title: Price trends of Agave Mezcalero in Mexico using multiple linear regression models

description: ABSTRACT: This study developed a multiple linear regression model to estimate the Average rural prices (ARP) in Mexico with information taken from the period 1999-2018. The variables used to generate this model were the supply and demand as represented by planted area, yield, exports and the ARP of Agave Tequilero and Mezcalero. The analysis was carried out through the multiple linear regression model (MLRM) with the least squares method and using the statistical package R. The following variables were identified as having a significant influence on the determination of the ARP: the yield of Agave Mezcalero (YAM), the ARP of Agave Tequilero and the new planted area of Agave Tequilero (NPAATt-6) with an adjustment of 6 periods. Overall, three models were generated: model 2 was considered the most appropriate because it allows carrying out future forecasts with the new planted area with Agave Tequilero with 2 independent variables. YAM and NPAATt-6 were useful in predicting 65.5% of the annual variations in the ARP and helped recognize the negative trend of the Agave price from 2020 to 2024. Therefore, the use of the MLRM to estimate the Agave ARP can be a useful tool in predicting the performance of this crop.
DOI: 10.6084/m9.figshare.20278258
title: An alternative route to extract nickel and cobalt from non-commercial laterite ore

description: Abstract Laterite ores, which represent around two-thirds of nickel reserves, became an important source of nickel and cobalt metals. The objective of the present study was to investigate the efficiency of a hybrid route to extract nickel and cobalt present in a laterite ore sample which was not commercially attractive to be processed through the current routes. The process efficiency was investigated through the application of different test conditions, such as roast temperature, ore sample comminution, and moisture. Chemical analysis by atomic absorption was used to quantify the metals. The solid phase’s identification and characterization were accomplished by X-ray diffraction and Scanning Electron Microscopy. The Rietveld Method was used for the mineral’s phase quantification. In terms of nickel and cobalt extractions, the most favorable condition was: particle size smaller than 38 µm, 50% sulfuric acid (wt.%), and 10% moisture (wt.%), which permitted nickel, cobalt, magnesium, and iron recoveries of 84.5%, 92.0%, and 93.0%, 27.0% respectively. These results indicate the successful application of the route. In addition, it was found that chlorite, chromite, hematite, and goethite were identified as the main nickel and cobalt carriers present in the process residue.
DOI: 10.6084/m9.figshare.20278258.v1
title: An alternative route to extract nickel and cobalt from non-commercial laterite ore

description: Abstract Laterite ores, which represent around two-thirds of nickel reserves, became an important source of nickel and cobalt metals. The objective of the present study was to investigate the efficiency of a hybrid route to extract nickel and cobalt present in a laterite ore sample which was not commercially attractive to be processed through the current routes. The process efficiency was investigated through the application of different test conditions, such as roast temperature, ore sample comminution, and moisture. Chemical analysis by atomic absorption was used to quantify the metals. The solid phase’s identification and characterization were accomplished by X-ray diffraction and Scanning Electron Microscopy. The Rietveld Method was used for the mineral’s phase quantification. In terms of nickel and cobalt extractions, the most favorable condition was: particle size smaller than 38 µm, 50% sulfuric acid (wt.%), and 10% moisture (wt.%), which permitted nickel, cobalt, magnesium, and iron recoveries of 84.5%, 92.0%, and 93.0%, 27.0% respectively. These results indicate the successful application of the route. In addition, it was found that chlorite, chromite, hematite, and goethite were identified as the main nickel and cobalt carriers present in the process residue.
DOI: 10.6084/m9.figshare.20278260
title: An alternative theoretical framework for the state-economy interactions in transforming economies

description: ABSTRACT This paper is built on the premise that frameworks of representation and worldviews are important for reflection and decision in economic policymaking, becoming more important as the stakes are high and the future is uncertain, as in Central and East European countries. There appears to be a growing feeling of discrepancy between the errors that were made, though based on a rather unified body of scientific economic theory, and differing views advocating more pragmatism and less overconfidence in economic analysis. The latter however are scattered and suffer from the absence of a unified theoretical framework although sharing several basic features which are not perceived. This paper attempts to reflect on such alternative.
DOI: 10.6084/m9.figshare.20278260.v1
title: An alternative theoretical framework for the state-economy interactions in transforming economies

description: ABSTRACT This paper is built on the premise that frameworks of representation and worldviews are important for reflection and decision in economic policymaking, becoming more important as the stakes are high and the future is uncertain, as in Central and East European countries. There appears to be a growing feeling of discrepancy between the errors that were made, though based on a rather unified body of scientific economic theory, and differing views advocating more pragmatism and less overconfidence in economic analysis. The latter however are scattered and suffer from the absence of a unified theoretical framework although sharing several basic features which are not perceived. This paper attempts to reflect on such alternative.
DOI: 10.6084/m9.figshare.20278263
title: Seroprevalence of arboviruses in Nasua nasua (Mammalia, Carnivora, Procyonidae) of synanthropic habitats in the Iguaçu National Park, Brazilian Atlantic Forest

description: ABSTRACT: Arboviruses are agents transmitted by arthropods and represent a considerable threat to public health worldwide, causing diseases in humans and animals. A serological investigation was carried out to detect total antibodies against different types of arboviruses in free-living coatis (Nasua nasua) from the Iguaçu National Park (INP) through the Hemagglutination Inhibition test. Serum samples were tested using antigens from 33 arboviruses belonging to the genera Alphavirus, Flavivirus, Orthobunyavirus, and Phlebovirus. The data showed that 23.6% (17/72) of coatis were seropositive for at least one of the tested antigens, including monotypic and heterotypic reactions. Seropositivity was detected for Alphavirus (5.9%, 1/17; WEEV), Flavivirus (64.7%, 11/17; YFV, ILHV, SLEV, BSQV, ROCV, WNV, DENV-1, DENV-2, DENV-3, DENV-4, and NJLV), Phlebovirus (88.2%, 15/17; ICOV and BUJV) and Orthobunyavirus (5.9%, 1/17; ORIV). The presence of antibodies to these viruses in coatis from INP indicated an apparent silent circulation of arbovirus, implying N. nasua to be a possible amplifying host of these arboviruses in the studied area. The data reported also serve as a warning about the possible risk of establishing an arbovirus transmission cycle involving vector arthropods and coatis, or even other wild animals, consequently, including humans in this transmission chain.
DOI: 10.6084/m9.figshare.20278263.v1
title: Seroprevalence of arboviruses in Nasua nasua (Mammalia, Carnivora, Procyonidae) of synanthropic habitats in the Iguaçu National Park, Brazilian Atlantic Forest

description: ABSTRACT: Arboviruses are agents transmitted by arthropods and represent a considerable threat to public health worldwide, causing diseases in humans and animals. A serological investigation was carried out to detect total antibodies against different types of arboviruses in free-living coatis (Nasua nasua) from the Iguaçu National Park (INP) through the Hemagglutination Inhibition test. Serum samples were tested using antigens from 33 arboviruses belonging to the genera Alphavirus, Flavivirus, Orthobunyavirus, and Phlebovirus. The data showed that 23.6% (17/72) of coatis were seropositive for at least one of the tested antigens, including monotypic and heterotypic reactions. Seropositivity was detected for Alphavirus (5.9%, 1/17; WEEV), Flavivirus (64.7%, 11/17; YFV, ILHV, SLEV, BSQV, ROCV, WNV, DENV-1, DENV-2, DENV-3, DENV-4, and NJLV), Phlebovirus (88.2%, 15/17; ICOV and BUJV) and Orthobunyavirus (5.9%, 1/17; ORIV). The presence of antibodies to these viruses in coatis from INP indicated an apparent silent circulation of arbovirus, implying N. nasua to be a possible amplifying host of these arboviruses in the studied area. The data reported also serve as a warning about the possible risk of establishing an arbovirus transmission cycle involving vector arthropods and coatis, or even other wild animals, consequently, including humans in this transmission chain.
DOI: 10.6084/m9.figshare.20278264
title: Nanobubbles: A Novel Targeted Drug Delivery System

description: Abstract Nanobubbles are nanometer size bubbles having different constituents of varying physicochemical characteristic for the inner core and outer shell. Nanobubbles are mainly fabricated to improve the stability, bioavailability and improve the biodistribution of the delivered drug to the specific targeted site. Their small sizes bubbles allow the possibility of extravasation from blood vessels into the surrounding tissues and ultrasound-targeted site-specific release with minimal invasiveness. Nanobubbles are developing as important contrast agents for imaging and carriers for drug delivery at targeted region. Sonication is the primary method for preparation of nanobubbles followed by thin-layer evaporation, high shear emulsification, mechanical agitation and coacervation or coalescence. With exposure to ultrasound/extracorporeal shock waves, the drug is liberated from the nanobubbles into the target cells. This review paper is an effort to reveal the different formulation development techniques briefly and varying shell and core content for developing nanobubbles.