cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.20005420
title: NATURAL DISTRIBUTION OF Myracrodruon urundeuva FR. ALL. IN BRAZIL AT CURRENT AND FUTURE CLIMATE SCENARIOS DUE TO GLOBAL CLIMATE CHANGE

description: ABSTRACT In this work, the prediction of the distribution of M. urundeuva Fr. All. was performed based on the region of natural occurrence of the species. Its geographic coordinates were obtained from online databases CRIA and SpecialLinks, from scientific articles and fieldwork carried out by Universidade Estadual Paulista (UNESP) in Ilha Solteira, São Paulo, Brazil. M. urundeuva is a native tree species with great potential for commercial use in Brazil. For this purpose, ecological niche modeling was used, with current layers of climate variables and layers prepared for future climate scenarios, according to the 4th Report of the Intergovernmental Panel on Climate Change (AR4/IPCC), using Worldclim data on Brazil. With the Open Modeller and ArcGIS programs, maps were generated to predict its occurrence for the current period and future climate scenarios, made according to the projections of global climate changes. With the projection of increases in temperature and precipitation in the area where the species occurs, it tends to migrate to areas of Brazil where the climate is currently milder, in the south and southeast regions. Due to climatic changes, the species tends to undergo changes in distribution and area size until 2080. It was projected for Caatinga and Pantanal, in both periods, an increase in area, while for the Cerrado, in the first period, the area increased, and, for the second, it decreased. Therefore, according to the results of the maps of future projections for the next decades, it is concluded that there will be changes in the distribution of M. urundeuva, with a significant reduction of the potential area of occurrence in the region.
DOI: 10.6084/m9.figshare.20005420.v1
title: NATURAL DISTRIBUTION OF Myracrodruon urundeuva FR. ALL. IN BRAZIL AT CURRENT AND FUTURE CLIMATE SCENARIOS DUE TO GLOBAL CLIMATE CHANGE

description: ABSTRACT In this work, the prediction of the distribution of M. urundeuva Fr. All. was performed based on the region of natural occurrence of the species. Its geographic coordinates were obtained from online databases CRIA and SpecialLinks, from scientific articles and fieldwork carried out by Universidade Estadual Paulista (UNESP) in Ilha Solteira, São Paulo, Brazil. M. urundeuva is a native tree species with great potential for commercial use in Brazil. For this purpose, ecological niche modeling was used, with current layers of climate variables and layers prepared for future climate scenarios, according to the 4th Report of the Intergovernmental Panel on Climate Change (AR4/IPCC), using Worldclim data on Brazil. With the Open Modeller and ArcGIS programs, maps were generated to predict its occurrence for the current period and future climate scenarios, made according to the projections of global climate changes. With the projection of increases in temperature and precipitation in the area where the species occurs, it tends to migrate to areas of Brazil where the climate is currently milder, in the south and southeast regions. Due to climatic changes, the species tends to undergo changes in distribution and area size until 2080. It was projected for Caatinga and Pantanal, in both periods, an increase in area, while for the Cerrado, in the first period, the area increased, and, for the second, it decreased. Therefore, according to the results of the maps of future projections for the next decades, it is concluded that there will be changes in the distribution of M. urundeuva, with a significant reduction of the potential area of occurrence in the region.
DOI: 10.6084/m9.figshare.20005434
title: Financial losses in pork supply chain: a study of the pre-slaughter handling impacts

description: Brazil is amongst the world’s largest swine producers. However, its competitiveness has been vulnerable due to a lack of cooperation between the supply chain players. This condition makes the financial losses to be evaluated taking into account only an individual node, and most of the time, these damages are imputed by swine breeders. Living weight losses occur between the farm to slaughterhouses, and the main cause of these losses is the pre-slaughter handling, especially during animal transportation. In this research, we analyzed the pre-slaughter handling in a swine farm in Brasilândia, MS, Brazil. Analyzed data were provided by five slaughterhouses (farm clients) from the studied region, in which it was considered living weight losses, carcass bruising, animal injury, and death rate. The results indicated that total financial losses represent 160 thousand dollars per year, when taking into account the supply chain management.
DOI: 10.6084/m9.figshare.20005434.v1
title: Financial losses in pork supply chain: a study of the pre-slaughter handling impacts

description: Brazil is amongst the world’s largest swine producers. However, its competitiveness has been vulnerable due to a lack of cooperation between the supply chain players. This condition makes the financial losses to be evaluated taking into account only an individual node, and most of the time, these damages are imputed by swine breeders. Living weight losses occur between the farm to slaughterhouses, and the main cause of these losses is the pre-slaughter handling, especially during animal transportation. In this research, we analyzed the pre-slaughter handling in a swine farm in Brasilândia, MS, Brazil. Analyzed data were provided by five slaughterhouses (farm clients) from the studied region, in which it was considered living weight losses, carcass bruising, animal injury, and death rate. The results indicated that total financial losses represent 160 thousand dollars per year, when taking into account the supply chain management.
DOI: 10.6084/m9.figshare.20005435
title: Application of artificial neural networks as an alternative to volumetric water balance in drip irrigation management in watermelon crop

description: Precision irrigation seeks to establish strategies which achieve an efficient ratio between the volume of water used (reduction in input) and the productivity obtained (increase in production). There are several studies in the literature on strategies for achieving this efficiency, such as those dealing with the method of volumetric water balance (VWB). However, it is also of great practical and economic interest to set up versatile implementations of irrigation strategies that: (i) maintain the performance obtained with other implementations, (ii) rely on few computational resources, (iii) adapt well to field conditions, and (iv) allow easy modification of the irrigation strategy. In this study, such characteristics are achieved when using an Artificial Neural Network (ANN) to determine the period of irrigation for a watermelon crop in the Irrigation Perimeter of the Lower Acaraú, in the state of Ceará, Brazil. The Volumetric Water Balance was taken as the standard for comparing the management carried out with the proposed implementation of ANN. The statistical analysis demonstrates the effectiveness of the proposed management, which is able to replace VWB as a strategy in automation.
DOI: 10.6084/m9.figshare.20005437
title: Modeling of essential oil extraction with variable diffusion coefficient

description: Essential oils are volatile chemical compounds, characteristic for its fragrance and frequent antimicrobial and antioxidant activities. Essential oils are extracted from the glandular trichomes of herbs from various extraction methods. Industries give preference to extraction by steam distillation, for its traditional method, simple operation and low cost. The mathematical modeling of this process is an inevitable step for designing industrial plants of essential oil extraction with good operating condition. The model used in this article is based on the diffusion of the oil within the leaf. The discretization procedure of this model is presented through finite differences and its validation by comparing with the analytical solution. Data of profiles yield by extraction time were used to estimate the diffusion coefficient. In order to improve the model empirical equations were applied to describe de diffusion coefficient as a function of the oil concentration and the parameters of these equations were estimated. Using this modification, the model has no longer analytical solution, which justifies the adopted numerical procedure. The model was validated using data from literature.
DOI: 10.6084/m9.figshare.20005441
title: Water content limit for cryopreservation of pomegranate seeds (Punica granatum L.)

description: Traditionally, determining the ideal conditions for seed storage is obtained from experiments that study the combination of two factors: water content and storage temperature, monitoring the viability of the seeds over time. Based on the foregoing, the aim was to determine the water content limit to the freezing of the pomegranate seeds by cryogenics system, when stored at temperatures of -170 and -196 °C. The seeds have undergone to a process of wetting and drying until they achieve the moisture content of 4, 6, 8, 10, 12, and 14% on wet basis; shortly after, they were cryopreserved for five days and then defrosted gradually at temperatures of -196, -170, -80, 10 °C and room temperature with an interval of 3 hours for each temperature, in order to be conducted tests of germination and vigor. For purpose of a comparative analysis it was used storage of seeds at 25 °C and 70% relative humidity for the same period of time (5 days). The statistical design was completely randomized with 6 X 3 factorial arrangement represented by the water content and temperature, using four replicates per treatment. It can be concluded that the best percentage of germination and vigor of a pomegranate was obtained when these seeds were cryopreserved in nitrogen vapor (-170 °C), with a water content of 10% w.b.
DOI: 10.6084/m9.figshare.20005441.v1
title: Water content limit for cryopreservation of pomegranate seeds (Punica granatum L.)

description: Traditionally, determining the ideal conditions for seed storage is obtained from experiments that study the combination of two factors: water content and storage temperature, monitoring the viability of the seeds over time. Based on the foregoing, the aim was to determine the water content limit to the freezing of the pomegranate seeds by cryogenics system, when stored at temperatures of -170 and -196 °C. The seeds have undergone to a process of wetting and drying until they achieve the moisture content of 4, 6, 8, 10, 12, and 14% on wet basis; shortly after, they were cryopreserved for five days and then defrosted gradually at temperatures of -196, -170, -80, 10 °C and room temperature with an interval of 3 hours for each temperature, in order to be conducted tests of germination and vigor. For purpose of a comparative analysis it was used storage of seeds at 25 °C and 70% relative humidity for the same period of time (5 days). The statistical design was completely randomized with 6 X 3 factorial arrangement represented by the water content and temperature, using four replicates per treatment. It can be concluded that the best percentage of germination and vigor of a pomegranate was obtained when these seeds were cryopreserved in nitrogen vapor (-170 °C), with a water content of 10% w.b.
DOI: 10.6084/m9.figshare.20005446.v1
title: Economic feasibility of irrigation management technologies for cowpea production in the cocais region (Maranhão state, Brazil)

description: Despite the low yield, cowpea is a crop of great socio-economic interest in Northern and Northeastern Brazil. Irrigation allows improvement in crop yield and profitability, especially when properly handled, for which, several management technologies are available. Thus, this study aimed to evaluate, economically, different irrigation management technologies to cultivate cowpea [Vigna unguiculata (L.) Walp.] in two growing seasons (spring and fall) in the Cocais region, Maranhão State, Brazil. We carried out a trial at an experimental area of the Institute of Maranhão, in Codó County. The experiment was performed in a randomized block design with seven treatments and four replications. Thereby, it was performed an economic analysis from the perspective of sound investment opportunity, without considering risks associated with this activity. We found that, regardless growing season and/ or management technology, it was feasible to grow cowpea under conventional sprinkling irrigation at the conditions of the Cocais region. Furthermore, it was observed that spring cropping was more profitable for all treatments.
DOI: 10.6084/m9.figshare.20005446
title: Economic feasibility of irrigation management technologies for cowpea production in the cocais region (Maranhão state, Brazil)

description: Despite the low yield, cowpea is a crop of great socio-economic interest in Northern and Northeastern Brazil. Irrigation allows improvement in crop yield and profitability, especially when properly handled, for which, several management technologies are available. Thus, this study aimed to evaluate, economically, different irrigation management technologies to cultivate cowpea [Vigna unguiculata (L.) Walp.] in two growing seasons (spring and fall) in the Cocais region, Maranhão State, Brazil. We carried out a trial at an experimental area of the Institute of Maranhão, in Codó County. The experiment was performed in a randomized block design with seven treatments and four replications. Thereby, it was performed an economic analysis from the perspective of sound investment opportunity, without considering risks associated with this activity. We found that, regardless growing season and/ or management technology, it was feasible to grow cowpea under conventional sprinkling irrigation at the conditions of the Cocais region. Furthermore, it was observed that spring cropping was more profitable for all treatments.
DOI: 10.6084/m9.figshare.20005449.v1
title: Operating performance of furrowers and cutting disks association for no-tillage system

description: The objective was to evaluate tractor operating performance regarding traction application, energy consumption and working efficiency in association of crop residue cutting implements and soil breakers as the travelling speed. Experiment was performed at a farm in Santa Maria (RS), Brazil. Local soil was classified as Red Ultisol with sandy loam texture. The experiment consisted of 24 treatment combinations in a 2x3x4 factorial scheme. The combinations were composed by interactions furrowers (furrow opener fixed and rotary), cutting disks (without disk, plain disk, and undulating disk) and travelling speeds (1.11, 1.67, 2.22 and 2.78 m s-1). Tractor performance data were acquired through electronic instrumentation. Furrower and cutting disk association had improved performance at speeds of 1.11 and 1.67 m s-1 for requiring less traction and fuel consumption. Furthermore, disks reduced required traction at speed range of 1.11 to 2.78 m s-1. On the other hand, furrow opener device demanded higher tractions than mismatched disks; and both of them combined with cutting disks had increased demand too. Likewise, soil mobilization soil was not influenced by speed.
DOI: 10.6084/m9.figshare.20005449
title: Operating performance of furrowers and cutting disks association for no-tillage system

description: The objective was to evaluate tractor operating performance regarding traction application, energy consumption and working efficiency in association of crop residue cutting implements and soil breakers as the travelling speed. Experiment was performed at a farm in Santa Maria (RS), Brazil. Local soil was classified as Red Ultisol with sandy loam texture. The experiment consisted of 24 treatment combinations in a 2x3x4 factorial scheme. The combinations were composed by interactions furrowers (furrow opener fixed and rotary), cutting disks (without disk, plain disk, and undulating disk) and travelling speeds (1.11, 1.67, 2.22 and 2.78 m s-1). Tractor performance data were acquired through electronic instrumentation. Furrower and cutting disk association had improved performance at speeds of 1.11 and 1.67 m s-1 for requiring less traction and fuel consumption. Furthermore, disks reduced required traction at speed range of 1.11 to 2.78 m s-1. On the other hand, furrow opener device demanded higher tractions than mismatched disks; and both of them combined with cutting disks had increased demand too. Likewise, soil mobilization soil was not influenced by speed.
DOI: 10.6084/m9.figshare.20005450
title: Nozzle discharge coefficient for center-pivot system

description: This study aimed to determine the discharge coefficients (Cd) of sprinkler fixed-nozzles (Senninger, Nelson and Fabrimar), used in Brazilian center-pivot equipment, under laboratory conditions. These tests used the pressure range standard existing in the nozzle market (psi). A set of 45 Senninger, 42 Nelson and 36 Fabrimar nozzles were assessed, with three replications, in a total of 369 tested nozzles. Operating pressures ranged from 6 to 30 psi (41.37 to 206.84 kPa), with a reading gap of 2 psi (13.79 kPa), totaling 13 measures for nozzle. Discharge coefficient curves were drawn as function of nozzle size and operating pressures, which were 10, 15, 20, and 30 psi (68.95, 103.42, 137.90 and 206.84 kPa). Two precision pressure gauges (one analog and one digital) were used; being calibrated against a dead weight gauge. Flow rates were obtained using three electromagnetic induction gauges calibrated with volumetric data. Nozzle diameters were measured using a profile projector Model HB 400 (Starrett, São Paulo, Brazil). The results evidenced that discharge coefficient varies with nozzle diameter and operating pressure. Tests showed Cds within the range of 0.88 to 0.98, for the assessed nozzles.
DOI: 10.6084/m9.figshare.20005450.v1
title: Nozzle discharge coefficient for center-pivot system

description: This study aimed to determine the discharge coefficients (Cd) of sprinkler fixed-nozzles (Senninger, Nelson and Fabrimar), used in Brazilian center-pivot equipment, under laboratory conditions. These tests used the pressure range standard existing in the nozzle market (psi). A set of 45 Senninger, 42 Nelson and 36 Fabrimar nozzles were assessed, with three replications, in a total of 369 tested nozzles. Operating pressures ranged from 6 to 30 psi (41.37 to 206.84 kPa), with a reading gap of 2 psi (13.79 kPa), totaling 13 measures for nozzle. Discharge coefficient curves were drawn as function of nozzle size and operating pressures, which were 10, 15, 20, and 30 psi (68.95, 103.42, 137.90 and 206.84 kPa). Two precision pressure gauges (one analog and one digital) were used; being calibrated against a dead weight gauge. Flow rates were obtained using three electromagnetic induction gauges calibrated with volumetric data. Nozzle diameters were measured using a profile projector Model HB 400 (Starrett, São Paulo, Brazil). The results evidenced that discharge coefficient varies with nozzle diameter and operating pressure. Tests showed Cds within the range of 0.88 to 0.98, for the assessed nozzles.
DOI: 10.6084/m9.figshare.20005452
title: Effect of cycle time and airflow in biological nitrogen removal from poultry slaughterhouse wastewater using sequencing batch reactor

description: This study aimed to evaluate the influence of airflow (0.25, 0.50 and 0.75 L.L-1.min-1) and cycle time (10.45 h, 14.25 h and 17.35 h) on a sequencing batch reactor (SBR) performance in promoting nitrification and denitrification of poultry slaughterhouse wastewater. The operational stages included feeding, aerobic and anoxic reactions, sedimentation and discharge. SBR was operated in a laboratory scale with a working volume of 4 L, keeping 25% of biomass retained inside the reactor as inoculum for the next batch. In the anoxic stage, C: N ratio was maintained between 5 and 6 by adding cassava starch wastewater. A factorial design (22) with five repetitions was designed at the central point to evaluate the influence of cycle time and airflow on total inorganic nitrogen removal (N-NH4++N-NO2-+N-NO3-) and in the whole process (nitrification and denitrification). The highest total inorganic nitrogen removal (93.3%) was observed for airflow of 0.25 L.L-1.min‑1 and a cycle time of 14.25 h. At the end of the experiment, the sludge inside the reactor was characterized by fluorescent in situ hybridization (FISH), indicating the presence of ammonia and nitrite oxidizing bacteria.
DOI: 10.6084/m9.figshare.20005453
title: Hydrogen production from cassava processing wastewater in an anaerobic fixed bed reactor with bamboo as a support material

description: Attempting to associate waste treatment to the production of clean and renewable energy, this research sought to evaluate the biological production of hydrogen using wastewater from the cassava starch treatment industry, generated during the processes of extraction and purification of starch. This experiment was carried out in a continuous anaerobic reactor with a working volume of 3L, with bamboo stems as the support medium. The system was operated at a temperature of 36°C, an initial pH of 6.0 and under variations of organic load. The highest rate of hydrogen production, of 1.1 L.d-1.L-1, was obtained with application of an organic loading rate of 35 g.L-1.d-1, in terms of total sugar content and hydraulic retention time of 3h, with a prevalence of butyric and acetic acids as final products of the fermentation process. Low C/N ratios contributed to the excessive growth of the biomass, causing a reduction of up to 35% in hydrogen production, low percentages of H2 and high concentrations of CO2in the biogas.
DOI: 10.6084/m9.figshare.20005453.v1
title: Hydrogen production from cassava processing wastewater in an anaerobic fixed bed reactor with bamboo as a support material

description: Attempting to associate waste treatment to the production of clean and renewable energy, this research sought to evaluate the biological production of hydrogen using wastewater from the cassava starch treatment industry, generated during the processes of extraction and purification of starch. This experiment was carried out in a continuous anaerobic reactor with a working volume of 3L, with bamboo stems as the support medium. The system was operated at a temperature of 36°C, an initial pH of 6.0 and under variations of organic load. The highest rate of hydrogen production, of 1.1 L.d-1.L-1, was obtained with application of an organic loading rate of 35 g.L-1.d-1, in terms of total sugar content and hydraulic retention time of 3h, with a prevalence of butyric and acetic acids as final products of the fermentation process. Low C/N ratios contributed to the excessive growth of the biomass, causing a reduction of up to 35% in hydrogen production, low percentages of H2 and high concentrations of CO2in the biogas.