cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.9796343.v1
title: Ichthyofauna from floodplain lakes of Reserva de Desenvolvimento Sustentável Piagaçu-Purus (RDS-PP), lower rio Purus

description: Abstract: The ichthyofauna of the rio Purus has been little investigated, especially in its lower portion, characterized by diverse aquatic environments, especially in flooded areas. We inventoried the ichthyofauna of floodplain lakes with different management efforts in Reserva de Desenvolvimento Sustentável Piagaçu-Purus (RDS-PP), which represent important resource for commercial fishing in North region, in the first illustrated inventory of the fish fauna from lower rio Purus. We surveyed 20 lakes, classified as open access (eight lakes) and protected (12 lakes) during 2009 low water levels. A total of 2,299 individuals were collected, represented by seven orders, 25 families and 74 species. Characiformes was the most representative order in number of species and families, followed by Siluriformes, Cichliformes, Gymnotiformes, Clupeiformes, and Osteoglossiformes. Most abundant and frequent species were Pygocentrus nattereri, Triportheus angulatus, Serrasalmus sp. "2n=58", Pterygoplichthys gibbiceps, and Osteoglossum bicirrhosum. Protected lakes presented higher species richness compared to open access lakes. Similarly, protected lakes possessed 26 species occurring exclusively, with emphasis on Colossoma macropomum, an important species for fisheries due to its commercial importance. We added 44 new records of fish species for the lower rio Purus. Our results indicate the potential efficiency of zoning systems of open access and protected lakes established by local population and ruled by RDS-PP for fisheries management. Therefore, we strongly suggest its maintenance for conservation of ichthyofauna of floodplain lakes of lower rio Purus.
DOI: 10.6084/m9.figshare.9796346.v1
title: High Sunflower Densities as a Weed Control Strategy in an Integrated Crop-Livestock System

description: ABSTRACT: Sunflower is an important crop for Integrated Crop-livestock Systems (ILCS), and one of the main management difficulties identified in this crop is weed control, especially under no-till conditions when chemical weed control is not allowed. Therefore, the aim of this research was to evaluate the effect of greater sunflower population density on weed control, and its impact on sunflower yield, in an ILCS with eucalyptus in an Environmental Protection Area. Two population densities were tested (45 and 90 thousand pl. ha-1) in two crop systems (sunflower monoculture and sunflower-eucalyptus integration). An additional treatment was provided in the sunflower-eucalyptus integration, and 5 positions (2,4; 4,8; 7,2; 9,6; and 12 m) between the tree rows were evaluated. In a randomized block design, with eight repetitions, weed density and weed dry matter were determined at 40, 70 and 100 days after crop emergence. Also, phytosociological indices were calculated. The following yield components were evaluated: head diameter, number of achenes per head, and 1000-achene weight. There was lower weed infestation on the high density treatment in both systems. There was no difference of weed occurrence in the 5 positions between the tree rows. Sunflower yield was higher in the greatest population density in both systems. Increasing population density in sunflower crop is a practicable management to control weeds and to gain higher yield under free-herbicide conditions.
DOI: 10.6084/m9.figshare.9796322
title: Effect of moringa and bagasse ash filler particles on basalt/epoxy composites

description: Abstract This study evaluated the effect of moringa and nano ash filler particles on mechanical, chemical corrosion and moisture absorption of basalt fiber/epoxy composites. Epoxy resin and Araldite HY951 hardener was used as matrix along with the inclusion of filler particles while the bi-directional woven basalt fiber mat was used as the reinforcement in fabricating composites using hand layup technique. Three different composites i.e. Plain BF + matrix with no filler particles, BF + matrix with 10 wt, % moringa ash and BF + matrix with 10 wt, % bagasse ash were fabricated and tested according to the ASTM standards to determine the mechanical properties and chemical corrosion resistance. According to the experimental test results, the composites with moringa ash inclusion showed better properties than the bagasse ash inclusion and with no filler added composites.
DOI: 10.6084/m9.figshare.9796325
title: DIMSUB, a computer program for designing microirrigation subunits. Tool definition and case studies

description: ABSTRACT: DIMSUB is a computer program to complement a decision support tool (DST) to effectively study different hydraulic design alternatives in microirrigation systems. We developed environments in Visual Basic for applications for Microsoft Excel® that allow specific step-by-step functions to be created for the design of irrigation subunits. Different alternatives can be considered, such as types of emitter, lateral and submain pipe sizes, different feeding points, irregular subunit shapes and topography slopes. Furthermore, specific uniformity criteria need to be considered to achieve efficient water applications and proper design systems. Lengths of run lateral and submain pipes, position of the hydrant connection, pressure head and head loss in pipes or pressure-compensating emitters can be assigned to evaluate the results and choose the best design alternative. This user-friendly tool to study hydraulic variables is expected to be a valuable aid for the decision-making process in designing irrigation systems. Some examples of practical cases under specific crop conditions to design drip irrigation subunits are given using DIMSUB.
DOI: 10.6084/m9.figshare.9796334.v1
title: ESTIMATING VEGETATION VOLUME OF COFFEE CROPS USING IMAGES FROM UNMANNED AERIAL VEHICLES

description: ABSTRACT Tree crops, such as Arabica coffee (Coffea arabica L.), present enormous technical challenges in terms of pesticide application. The correct deposition and distribution of the active ingredient throughout the aerial part of these plants depends on knowledge of the canopy volume, but manually determining this volume is time consuming and imprecise. The objectives of this study were to develop a method to determine the vegetation volume of coffee crops from digital images captured by camera onboard unmanned aerial vehicles and to compare this approach with traditional vegetation volume estimation (tree row volume (TRV) method). Manual measurements of the canopy volume of four coffee cultivation areas were compared with data obtained using the method presented in this paper. It was concluded that the vegetation volume of coffee trees, a highly important variable in defining pesticide application techniques (in addition to other uses), could be determined in a practical and precise way by digitally processing the images captured by unmanned aerial vehicles. The method is fast and permits the assessment of large areas. Furthermore, estimates based on this method and the traditional TRV method were not significantly different.
DOI: 10.6084/m9.figshare.9796325.v1
title: DIMSUB, a computer program for designing microirrigation subunits. Tool definition and case studies

description: ABSTRACT: DIMSUB is a computer program to complement a decision support tool (DST) to effectively study different hydraulic design alternatives in microirrigation systems. We developed environments in Visual Basic for applications for Microsoft Excel® that allow specific step-by-step functions to be created for the design of irrigation subunits. Different alternatives can be considered, such as types of emitter, lateral and submain pipe sizes, different feeding points, irregular subunit shapes and topography slopes. Furthermore, specific uniformity criteria need to be considered to achieve efficient water applications and proper design systems. Lengths of run lateral and submain pipes, position of the hydrant connection, pressure head and head loss in pipes or pressure-compensating emitters can be assigned to evaluate the results and choose the best design alternative. This user-friendly tool to study hydraulic variables is expected to be a valuable aid for the decision-making process in designing irrigation systems. Some examples of practical cases under specific crop conditions to design drip irrigation subunits are given using DIMSUB.
DOI: 10.6084/m9.figshare.9796331.v1
title: Brazil, Paraguay, Argentina and Chile / Bioceanic Route: cultural relations in the lived territory

description: Abstract: This article has the countries of Platinum America engaged in the Bioceanic Route as its object of study, as well as its cultural relations of neighborhood. The study analyzes the material and non-material cultures permeating this space and its interlacements in the connection with the Central-West Region of Brazil and the Pacific. Therefore, it’s not enough the focus on the logistical issues that will favor the market in general, the agribusiness, as well as the importation and exportation of products, but rather to stimulate the business sectors of the four countries within the bioceanic route. The project generates relations of coexistence and narrows the territorial cultures. It is inferred that the relevance of this work is to safeguard the sense of place of the local citizens in favor of citizenship rights, thus, there is the need of not depriving the theme as a record of heritage preservation. For the accomplishment of this study, it was used the deductive approach with a holistic comprehensiveness, with a careful investigation in public archives, libraries, books, newspapers, sites, identifying the works that provided support to the present study. The findings indicate evidences that reaffirm and privilege the preservation of the identity, history and citizen identification.
DOI: 10.6084/m9.figshare.9796319
title: RAINFALL ZONING FOR COCOA GROWING IN BAHIA STATE (BRAZIL) USING FUZZY LOGIC

description: ABSTRACT Cacao is a species of great economic and social importance. Expanding the area grown with this crop has been limited by its climatic requirements. Agroclimatic zoning for agricultural sector and creation of land suitability maps by fuzzy logic contribute to such production expansion. In this sense, this study aimed to develop rainfall zoning for cacao in Bahia state using the fuzzy logic method. The used data came from rainfall historical series of 519 meteorological stations distributed throughout the state. Geostatistical analyses were used to quantify the spatial dependence degree of studied variable and kriging was used to develop maps representing mean monthly rainfall. These maps were submitted to continuous classification by fuzzy mapping for identification of high-risk areas for cocoa growing based on rainfall. Based on the fuzzy method, the southern mesoregion of Bahia state presented the highest rainfall uniformity, suggesting that this area is more suitable for cocoa growing.
DOI: 10.6084/m9.figshare.9796319.v1
title: RAINFALL ZONING FOR COCOA GROWING IN BAHIA STATE (BRAZIL) USING FUZZY LOGIC

description: ABSTRACT Cacao is a species of great economic and social importance. Expanding the area grown with this crop has been limited by its climatic requirements. Agroclimatic zoning for agricultural sector and creation of land suitability maps by fuzzy logic contribute to such production expansion. In this sense, this study aimed to develop rainfall zoning for cacao in Bahia state using the fuzzy logic method. The used data came from rainfall historical series of 519 meteorological stations distributed throughout the state. Geostatistical analyses were used to quantify the spatial dependence degree of studied variable and kriging was used to develop maps representing mean monthly rainfall. These maps were submitted to continuous classification by fuzzy mapping for identification of high-risk areas for cocoa growing based on rainfall. Based on the fuzzy method, the southern mesoregion of Bahia state presented the highest rainfall uniformity, suggesting that this area is more suitable for cocoa growing.
DOI: 10.6084/m9.figshare.9796322.v1
title: Effect of moringa and bagasse ash filler particles on basalt/epoxy composites

description: Abstract This study evaluated the effect of moringa and nano ash filler particles on mechanical, chemical corrosion and moisture absorption of basalt fiber/epoxy composites. Epoxy resin and Araldite HY951 hardener was used as matrix along with the inclusion of filler particles while the bi-directional woven basalt fiber mat was used as the reinforcement in fabricating composites using hand layup technique. Three different composites i.e. Plain BF + matrix with no filler particles, BF + matrix with 10 wt, % moringa ash and BF + matrix with 10 wt, % bagasse ash were fabricated and tested according to the ASTM standards to determine the mechanical properties and chemical corrosion resistance. According to the experimental test results, the composites with moringa ash inclusion showed better properties than the bagasse ash inclusion and with no filler added composites.
DOI: 10.6084/m9.figshare.9796307
title: Polypyrrole Film Doped with Corrosion-Inhibitors Electropolymerized on AA 1100

description: Polypyrrole films doped with dodecylbenzenesulfonate (PPy/DBS) and with oxy-anions tungstate (PPy/DBS/TUN) and vanadate (PPy/DBS/VAN) were potentiostatically electropolymerized on aluminum alloy 1100 (AA1100). The corrosion protection of these films was evaluated by the variation of the corrosion potential (ECORR) with the immersion time and by electrochemical impedance spectroscopy (EIS) measurements in 0.05 mol L-1 NaCl and 0.05 mol L-1 HCl solutions. The EIS measurements suggest that the tungstate and the vanadate play the role of a dopant and an inhibitor. The results presented here show that PPy/DBS/TUN and PPy/DBS/VANprovide a protective effect against the corrosion of the AA1100. It was shown that the oxyanions’ inhibitory action is different depending on the electrolyte pH. In an HCl solution PPy/DBS/TUN films improve protection against aluminum alloy’s corrosion. On the other hand, in a NaCl solution, PPy/DBS/VAN films and PPy/DBS/TUN films act as inhibitor, the former being more effective.
DOI: 10.6084/m9.figshare.9796310
title: Porto Murtinho, Mato Grosso do Sul, and the Bioceanic Highroad Crossing: possible paths for socio-environmental sustainability

description: Abstract This work aims at the municipality of Porto Murtinho, located in the southwest portion of Mato Grosso do Sul. It aims to analyze the local economy and its reflection on biodiversity in the last decades, besides probing possible impacts of the implementation of the Bioceanic Highroad Crossing, having as presuppositions the sustainable development and the recognition and appreciation of culture, ecotourism, bird-watching and wildlife tourism.
DOI: 10.6084/m9.figshare.9796304
title: Effects of Macrosegregation and Microstructure on the Corrosion Resistance and Hardness of a Directionally Solidified Zn-5.0wt.%Mg Alloy

description: This study aims to analyze the influence of macrosegregation on microstructure evolution, and of microstructure length scale on the corrosion resistance of a Zn-5.0wt.%Mg alloy casting. The analyzed samples were taken along the length of castings unidirectionally solidified in unsteady state conditions of heat extraction. Microstructure characterization, microhardness, linear polarization and electrochemical impedance spectroscopy (EIS) tests were performed. A unique type of microstructure was observed, characterized essentially by a morphology typified by idiomorphic MgZn2 crystals in a “complex eutectic mixture” [coexistence of stable (Zn+Mg2Zn11) and metastable (Zn+MgZn2) eutectics]. The correlation between thermal and microstructural parameters, permitted experimental growth laws, correlating the evolution of the lamellar eutectic spacing with the cooling rate to be established. Vickers microhardness and electrochemical corrosion tests showed that more refined microstructures associated with higher experimental cooling rates, are related to a better set of higher hardness and corrosion resistance.
DOI: 10.6084/m9.figshare.9796310.v1
title: Porto Murtinho, Mato Grosso do Sul, and the Bioceanic Highroad Crossing: possible paths for socio-environmental sustainability

description: Abstract This work aims at the municipality of Porto Murtinho, located in the southwest portion of Mato Grosso do Sul. It aims to analyze the local economy and its reflection on biodiversity in the last decades, besides probing possible impacts of the implementation of the Bioceanic Highroad Crossing, having as presuppositions the sustainable development and the recognition and appreciation of culture, ecotourism, bird-watching and wildlife tourism.
DOI: 10.6084/m9.figshare.9796295
title: Overcoming dormancy of Senna multijuga seeds with an ultrasonic probe the comparison with ultrasound and sulfuric acid baths

description: ABSTRACT: Understanding germination is extremely important for the production of seedlings that are used in revegetation of degraded areas. Some species enter dormancy as a survival strategy to overcome adverse environmental conditions. Their seeds germinate only when this process is interrupted, which can occur naturally when the conditions become more favorable for the survival of the species or by induction. Studies showed that ultrasound can increase the germination rate of seeds. The objective of this research was to evaluate the effect of an ultrasound probe and compare it with other methodologies implemented for seed germination of Senna multijuga (Rich.) H. S. Irwin & Barneby, a species used in revegetation of degraded areas. The experiment evaluated the effect of the ultrasonic probe at different powers on seeds that were placed to germinate in a gerbox on paper moistened with distilled water. Ninety-five percent of seeds treated with ultrasound and only 14% of non-treated seeds (control) germinated. There was no significant difference in the germination among the treatments with different powers. The speed of germination index (SGI) reached 4.7 in seeds that underwent the treatment, and 0.6 in the control group. From the results it is possible to conclude that the ultrasound probe is an efficient treatment to accelerate seed germination in this species; and consequently, contributed to production of a greater number of seedlings to be used in revegetation of degraded areas in a short period of time.
DOI: 10.6084/m9.figshare.9796307.v1
title: Polypyrrole Film Doped with Corrosion-Inhibitors Electropolymerized on AA 1100

description: Polypyrrole films doped with dodecylbenzenesulfonate (PPy/DBS) and with oxy-anions tungstate (PPy/DBS/TUN) and vanadate (PPy/DBS/VAN) were potentiostatically electropolymerized on aluminum alloy 1100 (AA1100). The corrosion protection of these films was evaluated by the variation of the corrosion potential (ECORR) with the immersion time and by electrochemical impedance spectroscopy (EIS) measurements in 0.05 mol L-1 NaCl and 0.05 mol L-1 HCl solutions. The EIS measurements suggest that the tungstate and the vanadate play the role of a dopant and an inhibitor. The results presented here show that PPy/DBS/TUN and PPy/DBS/VANprovide a protective effect against the corrosion of the AA1100. It was shown that the oxyanions’ inhibitory action is different depending on the electrolyte pH. In an HCl solution PPy/DBS/TUN films improve protection against aluminum alloy’s corrosion. On the other hand, in a NaCl solution, PPy/DBS/VAN films and PPy/DBS/TUN films act as inhibitor, the former being more effective.
DOI: 10.6084/m9.figshare.9796298
title: COMMERCIAL ACTIVITIES DURING THE COLONIAL PERIOD IN GOIÁS - BRAZIL

description: Abstract Since the colonial period, commercial activities have always been present in Goiás and even as subsidiary activities, they contributed to the economic dynamics of the Captaincy. In this historical and geographical article, these activities are discussed in the context of colonial economics. The research methodology is based on a bibliographical survey of the historical geographic formation of Goiás, and the documentary research used the databases of the Historical Geographical Institute of Goiás (IHGG) and the Ultramarinho Historical Archive of Lisbon (AHU). The result of the investigation shows that the commercial activities based mainly on importation were developed thanks to the surplus capital generated by the gold.
DOI: 10.6084/m9.figshare.9796304.v1
title: Effects of Macrosegregation and Microstructure on the Corrosion Resistance and Hardness of a Directionally Solidified Zn-5.0wt.%Mg Alloy

description: This study aims to analyze the influence of macrosegregation on microstructure evolution, and of microstructure length scale on the corrosion resistance of a Zn-5.0wt.%Mg alloy casting. The analyzed samples were taken along the length of castings unidirectionally solidified in unsteady state conditions of heat extraction. Microstructure characterization, microhardness, linear polarization and electrochemical impedance spectroscopy (EIS) tests were performed. A unique type of microstructure was observed, characterized essentially by a morphology typified by idiomorphic MgZn2 crystals in a “complex eutectic mixture” [coexistence of stable (Zn+Mg2Zn11) and metastable (Zn+MgZn2) eutectics]. The correlation between thermal and microstructural parameters, permitted experimental growth laws, correlating the evolution of the lamellar eutectic spacing with the cooling rate to be established. Vickers microhardness and electrochemical corrosion tests showed that more refined microstructures associated with higher experimental cooling rates, are related to a better set of higher hardness and corrosion resistance.
DOI: 10.6084/m9.figshare.9796292
title: Polyethersulfone Hollow Fiber Membranes Developed for Oily Emulsion Treatment

description: Polyethersulfone (PES) hollow fiber membranes were produced, containing 3% of two types of clay (Brasgel PA - MMT and Cloisite NA - CLNa), in order to modify the characteristics of the polyethersulfone membrane. By means of the X-ray diffraction, it was possible to observe an exfoliated and/or partially exfoliated structure in the membranes containing clay. From the analysis of contact angle, it was possible to notice an increase in the hydrophilicity of the membrane with the introduction of the clay. Through scanning electron microscopy (SEM), the morphology of the porous support of the membrane was modified with addition of clay, favoring greater uniformity of the pores and fingers. In the flow measurements with distilled water, the membranes with clay obtained the highest flows, being the greater flow with the Cloisite Na clay (~22 L/h.m2) and was in agreement with the contact angle results. In the analysis of permeation with the oily emulsion, the membrane with Brasgel PA clay in its structure presented the greatest flow (~16 L/h.m2) and the membrane with Cloisite Na presented the greatest yield (78.28%). Therefore, the clay acted by modifying both the morphology and the hydrophilicity of the polyethersulfone membrane, improving flow and yield.