cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.14268392
title: Hydrogeochemical characterization of groundwater for public supply in the Northeastern portion of the Guarani Aquifer System

description: ABSTRACT The Guarani Aquifer System (GAS) comprises one of the most important aquifers in the world due to its large water reserve and its groundwater quality. However, some regions that comprise the GAS groundwater for human supply are not thoroughly characterized on water chemistry and its relation with the local geology. This work presents the hydrogeochemical characterization of groundwater from the northeast region of the GAS used for human public supply in São Carlos (São Paulo, Brazil) based on samples from 27 deep boreholes. The groundwater exploration occurs mainly from GAS. However, it is also possible to verify the presence of the Botucatu, Piramboia, Serra Geral, Itaqueri, Adamantina, and Cenozoic sediments. Although little mineralized, there is a large ionic variability in the groundwater composition, also evidenced by spatial distribution of the electrical conductivity in the research area. These results explain four hydrochemical water types: mixed bicarbonate; calcium bicarbonate; sodium bicarbonate; and sodium fluoride, in decreasing order of representativeness. The concentration of ions in groundwater reflects the geological heterogeneity, through mineral dissolution and possible groundwater mixing. A Principal Component Analysis demonstrated that 62.7% of the total sample set variability is explained by two main factors. The first one represents 38.7% of the variability; mainly attributed to ions from minerals dissolution (HCO3−, Ca2+, Na+, Mg2+) and parameters related to this process (pH and electrical conductivity). The second group showed 24.0% of the total variability, which may be associated with anthropic activities origins, such as the presence of Cl−, N-NO3−, SO42-, F−, and K+.
DOI: 10.6084/m9.figshare.14268371.v1
title: Development, photosynthesis and yield of blueberry cultivar ‘Climax’ growth with different substrates and nitrogen fertilization under protected cultivation

description: ABSTRACT: Organic farming techniques gained popularity recently. Despite this increasing demand, there are still many problems, when comparing nutrient sources in organic and conventional farming systems. The study had as objective to evaluate the development of blueberry plants cultivar ‘Climax’ under protected cultivation in a substrate with different proportions of organic material and doses of applied mineral N. The blueberry nursery plants ‘Climax’ were transplanted into plastic pots and kept under protected cultivation. The soil and sand proportions were 40 and 20%, respectively, of the volume capacity of each pot. The remaining 40% were filled with organic material (bovine manure) and sawdust in the proportions of 5 and 35% (S1), 20 and 20% (S2) or 35 and 5% (S3), respectively. The experimental design was in complete randomized blocks, and the treatments were distributed in a 3x3 factorial arrangement, with six replications. The first factor was the different formulations of substrates. The second factor was N fertilization at 0, 10, and 15 g N plant-1. Evaluations of canopy volume, total leaf area, chlorophyll content and gas exchanges were performed six and eighteen months after transplanting. Fruits were harvested according to their ripening. Higher proportions of organic material in the substrate showed a substantial increase on estimated leaf area, canopy volume, chlorophyll content and clear efficiency of carboxylation (A/Ci), especially in plants that was not fertilized with mineral N. The highest yield was reported for the substrate S2, with intermediary amount of organic material, without the application of mineral N fertilizer. Considering agronomic and physiological traits, blueberry plants on the substrate S2 (20% OM) showed the best results, without mineral N fertilizing, becoming viable the organic management system for potted ‘Climax’ blueberry plants under protected cultivation.
DOI: 10.6084/m9.figshare.14268380
title: Mapping of erodibility and potential soil erosion in a hillside watershed

description: ABSTRACT The objective of this study was to estimate the soil loss potential through the universal soil loss equation and to identify the factors that control the erosive process in a hillside watershed. Rainfall erosivity factor (R) was calculated through normal precipitation data, thus obtaining monthly erosion indexes. The soil erodibility factor (K) was obtained from a soil sampling in an irregular grid of 340 points, in which the values were interpolated by the ordinary kriging method. The topographic factor (LS) was generated from the Digital Elevation Model (MDE) and the use and management and conservationist practices factors (CP) through field observations and tabulated values. The highest loss rates cover around 27% of the area, and are concentrated in places with higher slopes where shallow soils such as Litolics Neosols and Regolithic Neosols predominate. The LS factor determined the magnitude of the erosive process and the CP factor showed the highest relation with the soil loss control. The results found show the importance of the cover-management factor, in which measures of vegetation maintenance and conservation practices should be adopted and considered by the environmental managers in hillside regions with predominance of shallow soils associated to slope relief.
DOI: 10.6084/m9.figshare.14268399
title: Genetic effects on meat quality of crossbred lambs finished in confinement

description: Abstract The objective of this study was to evaluate the subjective, chemical and sensorial meat characteristics of ½ Santa Inês (SI) x ½ No Defined Racial Standard (NDRS) and ½ Brazilian Somalis (BS) x ½ No Defined Racial Standard (NDRS) crossbred lambs, finished in confinement. Sixteen uncastrated male lambs with initial weight of 19.7 ± 2.03 kg and approximately 90 days of age. A randomized block design was used, with blocks represented by the initial weight of each genetic group, with eight animals per group. There was a higher degree and distribution of marbling, percentage of lipids and meat color for ½ BS x ½ NDRS lambs. The conjugated linoleic acid profile was higher for ½ SI x ½ NDRS lambs. Considering the meat quality of the evaluated genetic groups, Santa Inês crossbred lambs have a better nutritional value for meat, especially taking into account the production of foods that are beneficial to human health.
DOI: 10.6084/m9.figshare.14268373
title: Balsas river basin: physical diagnosis and qualitative presentation of erosion-susceptible areas

description: Abstract Knowledge of the geomorphological behavior of watersheds is fundamental for the elaboration of public policies for the conservation of natural resources, to subsidize human occupation in a way that minimizes erosion processes. Considering the lack of information about the Balsas river basin, located in the south of the state of Maranhão, Brazil, this study aimed to make a physical diagnosis and indicate areas susceptible to erosion through qualitative classification. To that end, it drew on information from National Water Agency (ANA), the Geological Survey of Brazil (CPRM) and the United States Geological Survey (USGS) databases (digital elevation model, hydrography, soils and geology). Through geoprocessing routines, the basin and sub-basins were mapped and data was obtained for the calculation of morphometric indices. In addition, the areas susceptible to erosion were reclassified based on the curve number method, which assesses surface runoff potential by soil type and use. Reclassification into four susceptibility classes made it possible to map erosion susceptible areas. The morphogenetic characteristics found in the area show the need for appropriate management actions, since some types of soils, combined with 45% slope (about 44% of the area), are the most vulnerable to erosive processes. The conclusion reached was that planning of the use and occupation of the basin is extremely important to prevent the physical characteristics of the basin interfering negatively in the future of the region, as its agricultural as well as urban activities expand.
DOI: 10.6084/m9.figshare.14268386
title: Influence of different types of silver nanoparticles on the biodegradation of the organic fraction of municipal solid waste

description: ABSTRACT Municipal solid waste (MSW) contains approximately 50% of organic fraction (OF), which through landfill biodegradation processes results in leachate and biogas. Anaerobic degradation occurs driven by microbial processes, with a complex consortium of microorganisms, responsible for different phases. On the other hand, it is observed that nanoparticles (NPs), specially silver nanoparticles (AgNPs), have been appearing in a large range of new products. The MSW, for example, can present nanoparticulate materials, which, deposited in landfills, behave in a way still little known in science, and that can influence the biodegradation processes. The objective of this work is to analyze and verify the biochemical methanogenic potential of organic solid waste with and without the interference of different concentrations and types of AgNPs. For that purpose, tests of biochemical methane potential (BMP) with the concentrations of 5, 15 and 45, 50, 150 and 450 AgNPs mg.kg−1 were carried out and verified through a standard sample (white). Different types of nanoparticles were used: solid (powder), and two solutions, aqueous and alcoholic (polyvinyl alcohol — PVA). The results showed the interference of AgNPs in the highest concentrations used, considerably decreasing the biological process measured through the activity of microorganisms in the production of methane gas, which occurred in the range between 150 and 450 mg.kg−1 of AgNPs. Finally, the statistical studies and the mathematical modeling of the results showed that the logistic model adjusted well to the experimental data. The linear regression of the model parameters with the concentration of AgNPs demonstrates the decrease in the values of the parameters with the increase in the concentration of these compounds.
DOI: 10.6084/m9.figshare.14268386.v1
title: Influence of different types of silver nanoparticles on the biodegradation of the organic fraction of municipal solid waste

description: ABSTRACT Municipal solid waste (MSW) contains approximately 50% of organic fraction (OF), which through landfill biodegradation processes results in leachate and biogas. Anaerobic degradation occurs driven by microbial processes, with a complex consortium of microorganisms, responsible for different phases. On the other hand, it is observed that nanoparticles (NPs), specially silver nanoparticles (AgNPs), have been appearing in a large range of new products. The MSW, for example, can present nanoparticulate materials, which, deposited in landfills, behave in a way still little known in science, and that can influence the biodegradation processes. The objective of this work is to analyze and verify the biochemical methanogenic potential of organic solid waste with and without the interference of different concentrations and types of AgNPs. For that purpose, tests of biochemical methane potential (BMP) with the concentrations of 5, 15 and 45, 50, 150 and 450 AgNPs mg.kg−1 were carried out and verified through a standard sample (white). Different types of nanoparticles were used: solid (powder), and two solutions, aqueous and alcoholic (polyvinyl alcohol — PVA). The results showed the interference of AgNPs in the highest concentrations used, considerably decreasing the biological process measured through the activity of microorganisms in the production of methane gas, which occurred in the range between 150 and 450 mg.kg−1 of AgNPs. Finally, the statistical studies and the mathematical modeling of the results showed that the logistic model adjusted well to the experimental data. The linear regression of the model parameters with the concentration of AgNPs demonstrates the decrease in the values of the parameters with the increase in the concentration of these compounds.
DOI: 10.6084/m9.figshare.14268373.v1
title: Balsas river basin: physical diagnosis and qualitative presentation of erosion-susceptible areas

description: Abstract Knowledge of the geomorphological behavior of watersheds is fundamental for the elaboration of public policies for the conservation of natural resources, to subsidize human occupation in a way that minimizes erosion processes. Considering the lack of information about the Balsas river basin, located in the south of the state of Maranhão, Brazil, this study aimed to make a physical diagnosis and indicate areas susceptible to erosion through qualitative classification. To that end, it drew on information from National Water Agency (ANA), the Geological Survey of Brazil (CPRM) and the United States Geological Survey (USGS) databases (digital elevation model, hydrography, soils and geology). Through geoprocessing routines, the basin and sub-basins were mapped and data was obtained for the calculation of morphometric indices. In addition, the areas susceptible to erosion were reclassified based on the curve number method, which assesses surface runoff potential by soil type and use. Reclassification into four susceptibility classes made it possible to map erosion susceptible areas. The morphogenetic characteristics found in the area show the need for appropriate management actions, since some types of soils, combined with 45% slope (about 44% of the area), are the most vulnerable to erosive processes. The conclusion reached was that planning of the use and occupation of the basin is extremely important to prevent the physical characteristics of the basin interfering negatively in the future of the region, as its agricultural as well as urban activities expand.
DOI: 10.6084/m9.figshare.14268396
title: TEACHERS TRAINING IN THE HIGHER EDUCATION INTERFACE - RURAL AREA EDUCATION: ANALYSIS FROM THE UNIOESTE EXPERIENCE

description: ABSTRACT:5 This article analyzes the route and effectiveness of the undergraduate courses in alternation for rural area teachers in training in the Universidade Estadual do Oeste do Paraná (UNIOESTE), focusing on the insertion and stay of the popular sectors in state universities. The empirical reference are the experiences from the Pedagogy courses for Rural Area Teachers and the Degree in Rural Area Education, finished between 2004-2017 at UNIOESTE, which had 137 graduates. In addition to the experiences, the analysis focused on their monographs showed that when talking about the reality questions of insertion from the students-researchers show the relation between show the relation between Higher and Basic Education from the teachers training. The analyzed training experiences imprint contributions in the attribution of new meanings to the social role of universities that focus on the resizing of the access, content and form in Higher Education in its interface with Rural Area Education.
DOI: 10.6084/m9.figshare.14268404
title: Damage diagram of blast test results for determining reinforced concrete slab response for varying scaled distance, concrete strength and reinforcement ratio

description: Abstract Dynamic loads continue to draw the interest of structural engineers. The sources of these loads can be earthquakes, blast effects or transportation loads from railroads or highways. Especially for blast loads, terrorist attacks or military actions have caused many loses of lives and damages in several buildings. The verification of structural behavior is necessary to help designers to plan structures that support these loads and reduce damages. Although computer simulation with, specific software, have helped these designers, full-scale tests can provide valuable information about the real response of the structure. This paper presents damage diagram from ten full-scale field tests using approximately 2.70 kg of non-confined plastic bonded explosive against reinforced concrete slabs with different scaled distance, reinforcement ratio and concrete strength. The damage diagram is expected to be a help tool for designers to understand the effects of blast loads on slabs.
DOI: 10.6084/m9.figshare.14268396.v1
title: TEACHERS TRAINING IN THE HIGHER EDUCATION INTERFACE - RURAL AREA EDUCATION: ANALYSIS FROM THE UNIOESTE EXPERIENCE

description: ABSTRACT:5 This article analyzes the route and effectiveness of the undergraduate courses in alternation for rural area teachers in training in the Universidade Estadual do Oeste do Paraná (UNIOESTE), focusing on the insertion and stay of the popular sectors in state universities. The empirical reference are the experiences from the Pedagogy courses for Rural Area Teachers and the Degree in Rural Area Education, finished between 2004-2017 at UNIOESTE, which had 137 graduates. In addition to the experiences, the analysis focused on their monographs showed that when talking about the reality questions of insertion from the students-researchers show the relation between show the relation between Higher and Basic Education from the teachers training. The analyzed training experiences imprint contributions in the attribution of new meanings to the social role of universities that focus on the resizing of the access, content and form in Higher Education in its interface with Rural Area Education.
DOI: 10.6084/m9.figshare.14268399.v1
title: Genetic effects on meat quality of crossbred lambs finished in confinement

description: Abstract The objective of this study was to evaluate the subjective, chemical and sensorial meat characteristics of ½ Santa Inês (SI) x ½ No Defined Racial Standard (NDRS) and ½ Brazilian Somalis (BS) x ½ No Defined Racial Standard (NDRS) crossbred lambs, finished in confinement. Sixteen uncastrated male lambs with initial weight of 19.7 ± 2.03 kg and approximately 90 days of age. A randomized block design was used, with blocks represented by the initial weight of each genetic group, with eight animals per group. There was a higher degree and distribution of marbling, percentage of lipids and meat color for ½ BS x ½ NDRS lambs. The conjugated linoleic acid profile was higher for ½ SI x ½ NDRS lambs. Considering the meat quality of the evaluated genetic groups, Santa Inês crossbred lambs have a better nutritional value for meat, especially taking into account the production of foods that are beneficial to human health.
DOI: 10.6084/m9.figshare.14268404.v1
title: Damage diagram of blast test results for determining reinforced concrete slab response for varying scaled distance, concrete strength and reinforcement ratio

description: Abstract Dynamic loads continue to draw the interest of structural engineers. The sources of these loads can be earthquakes, blast effects or transportation loads from railroads or highways. Especially for blast loads, terrorist attacks or military actions have caused many loses of lives and damages in several buildings. The verification of structural behavior is necessary to help designers to plan structures that support these loads and reduce damages. Although computer simulation with, specific software, have helped these designers, full-scale tests can provide valuable information about the real response of the structure. This paper presents damage diagram from ten full-scale field tests using approximately 2.70 kg of non-confined plastic bonded explosive against reinforced concrete slabs with different scaled distance, reinforcement ratio and concrete strength. The damage diagram is expected to be a help tool for designers to understand the effects of blast loads on slabs.
DOI: 10.6084/m9.figshare.14268391
title: Application of titanium dioxide as photocatalyst in diuron degradation: operational variables evaluation and mechanistic study

description: ABSTRACT Diuron (DI) is a herbicide used in agricultural fields for weed control that can cause skin irritations and carcinogenic problems. In this study, heterogeneous photocatalysis was used for the degradation of the DI applying TiO2 as catalysts in a batch reactor. Experimental designs were performed to evaluate the influence of pH, catalyst concentration and substrate, also to maximize DI degradation results. After 3 hours of reaction, it was possible to observe that pH was the variable with the significant influence on the degradation of the DI using TiO2 as a catalyst. With the mechanistic study it was possible to propose that the degradation of this herbicide is carried out by the hydroxyl radicals generated from the O2 reduction. The statistical models performed in this study can be applied to improve the process of treatment of industrial and agricultural effluents using heterogeneous photocatalysis.
DOI: 10.6084/m9.figshare.14268397
title: Venturi: hydrodynamic cavitation device to accelerate biodiesel synthesis

description: Abstract The objective of this work was to evaluate the potential of Venturi in the synthesis of biodiesel from residual edible oil in a methyl route. For this purpose, an experimental apparatus consisting of a 5.2 L tank and a Venturi device designed to produce the cavitation phenomenon was constructed in laboratory scale. Biodiesel production was evaluated at three different Venturi inlet pressures: 4.4; 2.9; and 1.4 bar. Methyl esters contents were determined by gas chromatography. Biodiesel synthesis time with the Venturi device was 23.2 seconds (or 4.5 seconds per liter of biodiesel produced), which is equivalent to a single cycle of the system at maximum pressure (4.4 bar). In this condition, the yield of the ester contents was greater than 98%. There is no other case of synthesis as fast as that found in this work. The biodiesel characterization showed that the parameters kinematic viscosity, acidity index, cold clogging point, and specific mass are within the limits established by National Agency of Petroleum Natural Gas and Biofuels (Agência Nacional de Petróleo). The use of Venturi, as a cavitation device, was shown to be more efficient in biodiesel synthesis than other devices, such as orifice plates.
DOI: 10.6084/m9.figshare.14268397.v1
title: Venturi: hydrodynamic cavitation device to accelerate biodiesel synthesis

description: Abstract The objective of this work was to evaluate the potential of Venturi in the synthesis of biodiesel from residual edible oil in a methyl route. For this purpose, an experimental apparatus consisting of a 5.2 L tank and a Venturi device designed to produce the cavitation phenomenon was constructed in laboratory scale. Biodiesel production was evaluated at three different Venturi inlet pressures: 4.4; 2.9; and 1.4 bar. Methyl esters contents were determined by gas chromatography. Biodiesel synthesis time with the Venturi device was 23.2 seconds (or 4.5 seconds per liter of biodiesel produced), which is equivalent to a single cycle of the system at maximum pressure (4.4 bar). In this condition, the yield of the ester contents was greater than 98%. There is no other case of synthesis as fast as that found in this work. The biodiesel characterization showed that the parameters kinematic viscosity, acidity index, cold clogging point, and specific mass are within the limits established by National Agency of Petroleum Natural Gas and Biofuels (Agência Nacional de Petróleo). The use of Venturi, as a cavitation device, was shown to be more efficient in biodiesel synthesis than other devices, such as orifice plates.
DOI: 10.22008/fk2/oiajvo/zw23x0
title: al.tif

description: SICE version: Cloud removed, PPGC, SNAP7, pySICEv1.4