cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.11267327.v1
title: Non-Durable Consumption and Real-Estate Prices in Brazil: Panel-Data Analysis at the State Level

description: Abstract This paper investigates the effect of real-estate prices on non-durable consumption in Brazil. For that, we build a state-level panel of the determinants of non-durable consumption growth during the period 2008-2017. This period covers both a “boom” in real-estate prices and consumption (2008-2014) as well as a “bust” in them (2014-2017). We estimate the effect of house prices on consumption combining the techniques and ideas from Campbell e Cocco (2007) and Case et al. (2005). In particular, we estimated the same reduced-form equation proposed by Campbell e Cocco (2007), which is derived from simulating a theoretical model of housing and consumption choice under debt constraints. Due to Brazilian-data limitations, we were unable to run panel-data regressions at the cohort level (aggregation across households on different surveys) as in Campbell e Cocco (2007). Indeed, we had to resort to data aggregated at the state level to estimate our panel-data regressions as did Case et al. (2005). Our results suggest that changes in house prices significantly affect non-durable consumption in Brazil. The magnitudes are quantitatively close to the effects found for the U.K. by Campbell e Cocco (2007). Furthermore, we document that the effect of house prices on non-durable consumption is asymmetric, stronger in the “bust” than in the “boom” phase of the business cycle. This difference in the effects during different phases of the business cycle suggests that borrowing constraints might explain the effects of house prices on nondurable consumption.
DOI: 10.6084/m9.figshare.11267300
title: A Longitudinal Evaluation of a Teacher Education Project: CLAC 20 Years Later

description: ABSTRACT Today, engaging in university extension programs is mandatory for undergraduate students in Humanities. However, before 2015, efforts in this area were rather scant and tended to concentrate on services and consultancy. Few were the projects, like CLAC (Language Courses for the Community), that aimed at preparing teachers for the realities of the classroom by means of a hands-on experience. To examine the influence this pioneer project may have on the academic, professional, and personal life of the participants, this paper reports a longitudinal study with 60 participants. Their answers to an online questionnaire indicate that the project reached its objectives in terms of promoting critical thinking and autonomy, and preparing well-qualified professionals. This assessment shows that this pioneering project is a model that should be replicated.
DOI: 10.6084/m9.figshare.11267309.v1
title: Annual cropland mapping using data mining and OLI Landsat-8

description: ABSTRACT In the state of Paraná, Brazil, there are no major changes in areas cultivated with annual crops, mainly due to environmental laws that do not allow expansions to new areas. There is a great contribution of the annual crops to the domestic demand of food and economic demand in the exports. Thus, the area and distribution of annual crops are information of great importance. New methodologies, such as data mining, are being tested with the objective of analyzing and improving their potential use for classification of land use and land cover. This study used the classifiers decision tree and random forest with Normalized Difference Vegetation Index (NDVI) temporal metrics on images from Operational Land Imager (OLI)/Landsat-8. The results were compared with traditional methods spectral images and Maximum Likelihood Classifier (MLC). At first, seven classes were mapped (water bodies, sugarcane, urban area, annual crops, forest, pasture and reforestation areas); then, only two classes were considered (annual crops and other targets). When classifying the seven targets, both methods had corresponding results, showing global accuracy near 84%. NDVI temporal metrics showed producer’s and user’s accuracy for the annual crop class of 86 and 100%, respectively. However, if considering only two classes, the NDVI temporal metrics reached global accuracy of near 98% and producer’s and user’s accuracy above 94%.
DOI: 10.6084/m9.figshare.11267315.v1
title: The Role of Textbooks for Promoting Autonomy in English Learning

description: ABSTRACT The present study investigates the role of textbooks for promoting learner autonomy in teaching English as a foreign language, drawing on the content analysis of three textbooks and interviews to six teachers who used them. The textbooks include activities that can potentially promote learner autonomy, although in a reduced number and mostly focused on processes of language learning/ use rather than on didactic processes and the learner’s self. The teachers acknowledge the importance of textbooks but also their limitations for promoting autonomy, use complementary learner-centred strategies, and point out the prevalence of teaching cultures that constrain this approach. An exploratory reflection-action framework for promoting autonomy emerges from the study as regards the textbook (assumptions and activities) and the teacher (conceptions, premises, strategies, and constraints.
DOI: 10.6084/m9.figshare.11267324.v1
title: Characterization of NTC automotive thermistor

description: ABSTRACT The automotive thermistors are electroceramics with sensorial characteristics housed in metallic cases fixed to the radiator, whose function is to control the temperature of the cooling water of the engine. The objective of this work was to determine the sensitivity of two commercial thermistors applied in automotive vehicle. Characterized thermistors were commercially available, and after disassembling the kits, X-ray diffraction (XRD), scanning electron microscopy (SEM), microanalysis (EDS) and impedance spectroscopy analyzes were performed on the samples. X-ray diffraction indicated that the materials that make up the thermistors have spinel-like atomic structure (AB2O4), in the chemical map via EDS high homogeneity of the chemical components can be observed and the characteristic resistance ratio values (β-factor) are within the range indicated for indicated application Based on the results obtained it is verified that the sensorial characteristics of the thermistors are directly related to their physico-chemical characteristics.
DOI: 10.6084/m9.figshare.11267297
title: Post-treatment of coagulated leachate by adsorption in ostreculture waste

description: ABSTRACT In this work the leachate treatment of an urban landfill was carried out through a combination of coagulation/flocculation and adsorption processes. The leachate employed was collected in the municipal solid waste landfill of Muribeca-PE and coagulated with lime. The objective was to evaluate the use of oyster powder as adsorbent. The adsorption experiments were performed in batch using the best conditions for activation and process through two experimental designs. Then, the kinetic and equilibrium studies were carried out as well as an evaluation of each stage of the process. The equilibrium time was 40 min. Adsorption isotherms followed the Langmuir model and the maximum adsorption capacity was 45.45 Hazen.L.g-1. The combination of the treatment processes in question was very efficient, achieving a reduction of approximately 95% DBO, 40% COD, 70% of the leachate color.
DOI: 10.6084/m9.figshare.11267300.v1
title: A Longitudinal Evaluation of a Teacher Education Project: CLAC 20 Years Later

description: ABSTRACT Today, engaging in university extension programs is mandatory for undergraduate students in Humanities. However, before 2015, efforts in this area were rather scant and tended to concentrate on services and consultancy. Few were the projects, like CLAC (Language Courses for the Community), that aimed at preparing teachers for the realities of the classroom by means of a hands-on experience. To examine the influence this pioneer project may have on the academic, professional, and personal life of the participants, this paper reports a longitudinal study with 60 participants. Their answers to an online questionnaire indicate that the project reached its objectives in terms of promoting critical thinking and autonomy, and preparing well-qualified professionals. This assessment shows that this pioneering project is a model that should be replicated.
DOI: 10.6084/m9.figshare.11267276
title: Growth promotion of Guinea grass by diazotrophic bacteria1

description: ABSTRACT The Panicum maximum species (cv. Mombaça) is a forage plant well adapted to the different edaphoclimatic conditions found in Brazil; however, it requires high nitrogen fertilizer doses to ensure high yields. The present study aimed to assess the inoculation effect with associative diazotrophic bacteria strains on the yield and bromatological characteristics of the Guinea grass. A randomized block design was used, consisting of 25 treatments, being 23 of them inoculated with diazotrophic bacteria and two without inoculation (one with and the other without mineral nitrogen), with four repetitions. The analyzed variables were stem diameter; leaf width and length; leaf, stem and root dry mass yield; crude protein; acid and neutral detergent fibers. There were no differences among the treatments for root dry mass, stem diameter and acid detergent fiber. For the remaining variables, a positive effect of the inoculation with diazotrophic bacteria was observed, particularly for the following Unifenas strains: 100-06, 100-13, 100-26, 100-30, 10-35, 100-54, 100-69, 100-71 and 100-94. This reveals the potential of these bacterial strains for use at the sustainable production of the Guinea grass with a reduction in the use of nitrogen inputs.
DOI: 10.6084/m9.figshare.11267276.v1
title: Growth promotion of Guinea grass by diazotrophic bacteria1

description: ABSTRACT The Panicum maximum species (cv. Mombaça) is a forage plant well adapted to the different edaphoclimatic conditions found in Brazil; however, it requires high nitrogen fertilizer doses to ensure high yields. The present study aimed to assess the inoculation effect with associative diazotrophic bacteria strains on the yield and bromatological characteristics of the Guinea grass. A randomized block design was used, consisting of 25 treatments, being 23 of them inoculated with diazotrophic bacteria and two without inoculation (one with and the other without mineral nitrogen), with four repetitions. The analyzed variables were stem diameter; leaf width and length; leaf, stem and root dry mass yield; crude protein; acid and neutral detergent fibers. There were no differences among the treatments for root dry mass, stem diameter and acid detergent fiber. For the remaining variables, a positive effect of the inoculation with diazotrophic bacteria was observed, particularly for the following Unifenas strains: 100-06, 100-13, 100-26, 100-30, 10-35, 100-54, 100-69, 100-71 and 100-94. This reveals the potential of these bacterial strains for use at the sustainable production of the Guinea grass with a reduction in the use of nitrogen inputs.
DOI: 10.6084/m9.figshare.11267297.v1
title: Post-treatment of coagulated leachate by adsorption in ostreculture waste

description: ABSTRACT In this work the leachate treatment of an urban landfill was carried out through a combination of coagulation/flocculation and adsorption processes. The leachate employed was collected in the municipal solid waste landfill of Muribeca-PE and coagulated with lime. The objective was to evaluate the use of oyster powder as adsorbent. The adsorption experiments were performed in batch using the best conditions for activation and process through two experimental designs. Then, the kinetic and equilibrium studies were carried out as well as an evaluation of each stage of the process. The equilibrium time was 40 min. Adsorption isotherms followed the Langmuir model and the maximum adsorption capacity was 45.45 Hazen.L.g-1. The combination of the treatment processes in question was very efficient, achieving a reduction of approximately 95% DBO, 40% COD, 70% of the leachate color.
DOI: 10.6084/m9.figshare.11267270
title: Flux decline mechanisms in polyetherimide microfiltration membranes for clarification of synthetic produced water

description: ABSTRACT Polyetherimide microfiltration membranes were prepared by phase inversion method aiming the control of film thickness, porosity and pore size. 1-methyl-2-pirrolidone was used as solvent and water as non-solvent. The properties of the membranes were addressed by means of scanning electron microscopy, dead-end and tangential flow microfiltration of a synthetic produced water effluent as well as the pore blocking mechanisms of the systems as described by Hermia models. The results showed that membrane morphology was significant modified by the kinetics of precipitation. The medium pore size ranged from 1.2 to 10.4 µm, both with finger-like structure. Permeation tests showed total flux decline lower for tangential flow mode (89.5%) than the dead-end (97.3%). However, the reversible flux decline was higher than the irreversible one in both systems. The rejection was higher than 95.5%, which was addressed by turbidity. Regarding to the mechanisms to describe flux decline, it was evidenced that intermediate pore blocking was able to explain the results for dead-end filtration. Hermia model did not adjust to tangential flow mode, probably due to the stationary flux obtained with time. The results showed the potential of the system to be used in long term microfiltration, since the washing of the membranes is periodically observed.
DOI: 10.6084/m9.figshare.11267273
title: Optimization of ultrasound-assisted enzymatic extraction and in vitro antioxidant activities of polysaccharides extracted from the leaves of Perilla frutescens

description: Abstract A Box-Behnken design was employed to optimize ultrasound-assisted enzymatic extraction of polysaccharides from perilla leaves. Four independent variables, namely, liquid-to-solid ratio, enzymatic time, enzymatic temperature, and ultrasonic power were investigated. Under the optimal liquid-to-solid ratio of 41:1, enzymatic time of 40 min, enzymatic temperature of 49 °C, and ultrasonic power of 204 W, the experimental polysaccharide yield was 3.84% (n = 3), which was close to the value predicted by response surface methodology (3.9%). Four polysaccharides (PLP1, PLP2, PLP3, and PLP4) were obtained with DEAE-cellulose-52 and Sephadex G-100 chromatography, and their antioxidant activities were investigated with various antioxidant assays in vitro. All the four polysaccharides possessed good antioxidant properties in a concentration-dependent manner, and PLP3 presented the highest antioxidant activity. Thus, the novel polysaccharides extracted from perilla leaves could be promising bioactive macromolecules that can be applied as potential antioxidants in medical and food industries.
DOI: 10.6084/m9.figshare.11267264
title: Morphological characterization and selection of castor bean accessions for mechanized production1

description: ABSTRACT Castor bean (Ricinus communis L.) is an oilseed found in different regions worldwide, due to its easy propagation and adaptability. Cropping more productive disease-resistant genotypes that enable a mechanized production ensures greater economic returns for farmers. This study aimed to morphologically characterize and select promising castor bean accessions for mechanized cropping, mainly as a source of genetic variability for breeding programs with this purpose. Fifty accessions were assessed. Analysis of variance, dissimilarity clustering via the unweighted pair-group method with arithmetic mean (UPGMA) and principal component analysis were used to analyze the collected data. The dissimilarity analysis based on the Gower distance for qualitative and quantitative variables revealed three groups of accessions and the principal component analysis enabled the selection of those with desirable traits. The accessions BOC1, PRAT1 and SM2 exhibited morpho-agronomic characteristics of interest to the mechanized production, such as ideal plant height, diameter, seed weight and oil content. Such genotypes show a potential for use as genitors in genetic breeding programs of castor bean.
DOI: 10.6084/m9.figshare.11267258
title: CONTEMPORARY AND FUTURE POTENTIAL GEOGRAPHIC DISTRIBUTION OF Cedrela fissilis Vell. UNDER CLIMATE CHANGE SCENARIOS

description: ABSTRACT The objective of the present work was to model the climate niche of Cedrela fissilis Vell. and to project the contemporary and future potential spatial distribution considering different climate change scenarios. Species occurrence data were obtained from the SpeciesLink and Global Biodiversity Information Facility (GBIF) databases. Altitude data, and 19 climate variables for both present and future conditions were obtained from the WorldClim database. The spatial prediction for the year 2070, considering an optimistic scenario (RCP 4.5) and a pessimistic one (RCP 8.5), was defined by Intergovernmental Panel on Climate Change (IPCC) regarding the concentration of greenhouse gases. The climate niche modeling was performed using the Maximum Entropy algorithm (MaxEnt). The results showed that C. fissilis has a wide geographic distribution, occurring in most South American countries. Its distribution showed a high correlation associated with the isothermal and precipitation variables in the humid month. In future scenarios, impacts on the climatic suitability of the areas in which the species occur, will not be spatially homogeneous. Indeed, reductions of about 47% (RCP4.5) and 63% (RCP8.5) are expected. It is recommended the creation and expansion of Conservation Units (CU) in areas that will remain climatically suitable for this species. The areas that will not have a favorable climate in the future should be considered strategic for genetic rescue and establishment of germplasm banks. Areas changing into a favorable climate should be considered as new areas of ecological and forestry interest.
DOI: 10.6084/m9.figshare.11267270.v1
title: Flux decline mechanisms in polyetherimide microfiltration membranes for clarification of synthetic produced water

description: ABSTRACT Polyetherimide microfiltration membranes were prepared by phase inversion method aiming the control of film thickness, porosity and pore size. 1-methyl-2-pirrolidone was used as solvent and water as non-solvent. The properties of the membranes were addressed by means of scanning electron microscopy, dead-end and tangential flow microfiltration of a synthetic produced water effluent as well as the pore blocking mechanisms of the systems as described by Hermia models. The results showed that membrane morphology was significant modified by the kinetics of precipitation. The medium pore size ranged from 1.2 to 10.4 µm, both with finger-like structure. Permeation tests showed total flux decline lower for tangential flow mode (89.5%) than the dead-end (97.3%). However, the reversible flux decline was higher than the irreversible one in both systems. The rejection was higher than 95.5%, which was addressed by turbidity. Regarding to the mechanisms to describe flux decline, it was evidenced that intermediate pore blocking was able to explain the results for dead-end filtration. Hermia model did not adjust to tangential flow mode, probably due to the stationary flux obtained with time. The results showed the potential of the system to be used in long term microfiltration, since the washing of the membranes is periodically observed.
DOI: 10.6084/m9.figshare.11267264.v1
title: Morphological characterization and selection of castor bean accessions for mechanized production1

description: ABSTRACT Castor bean (Ricinus communis L.) is an oilseed found in different regions worldwide, due to its easy propagation and adaptability. Cropping more productive disease-resistant genotypes that enable a mechanized production ensures greater economic returns for farmers. This study aimed to morphologically characterize and select promising castor bean accessions for mechanized cropping, mainly as a source of genetic variability for breeding programs with this purpose. Fifty accessions were assessed. Analysis of variance, dissimilarity clustering via the unweighted pair-group method with arithmetic mean (UPGMA) and principal component analysis were used to analyze the collected data. The dissimilarity analysis based on the Gower distance for qualitative and quantitative variables revealed three groups of accessions and the principal component analysis enabled the selection of those with desirable traits. The accessions BOC1, PRAT1 and SM2 exhibited morpho-agronomic characteristics of interest to the mechanized production, such as ideal plant height, diameter, seed weight and oil content. Such genotypes show a potential for use as genitors in genetic breeding programs of castor bean.
DOI: 10.6084/m9.figshare.11267273.v1
title: Optimization of ultrasound-assisted enzymatic extraction and in vitro antioxidant activities of polysaccharides extracted from the leaves of Perilla frutescens

description: Abstract A Box-Behnken design was employed to optimize ultrasound-assisted enzymatic extraction of polysaccharides from perilla leaves. Four independent variables, namely, liquid-to-solid ratio, enzymatic time, enzymatic temperature, and ultrasonic power were investigated. Under the optimal liquid-to-solid ratio of 41:1, enzymatic time of 40 min, enzymatic temperature of 49 °C, and ultrasonic power of 204 W, the experimental polysaccharide yield was 3.84% (n = 3), which was close to the value predicted by response surface methodology (3.9%). Four polysaccharides (PLP1, PLP2, PLP3, and PLP4) were obtained with DEAE-cellulose-52 and Sephadex G-100 chromatography, and their antioxidant activities were investigated with various antioxidant assays in vitro. All the four polysaccharides possessed good antioxidant properties in a concentration-dependent manner, and PLP3 presented the highest antioxidant activity. Thus, the novel polysaccharides extracted from perilla leaves could be promising bioactive macromolecules that can be applied as potential antioxidants in medical and food industries.
DOI: 10.6084/m9.figshare.11267255
title: Preparation of gluten-free crab nugget (Ucidescordatus) with added fiber

description: ABSTRACT: Crab meat is rich in nutrients such as polyunsaturated fatty acids, minerals, and vitamins. Its catch is one of the most important fishing modalities in the North Brazilian state of Pará; however,crab is under utilized in the food industry and mainly sold as fresh meat. The study aimed to develop three formulations of gluten-free crab nuggets with added fiber. To reduce the cost of the final product, three formulations(F1, F2, and F3) were developed by the addition of rice flour at 0% (F1), 15% (F2), and 30% (F3) as a partial replacement of crab meat. Physicochemical and microbiological analyses were performed according to the legislation. In sensory intent analysis, F1 and F2 stood out in relation to F3, butall formulations were well accepted. The cost per unit of the formulations was 0.37 Brazilian reals (R$) for F1, R$ 0.27 for F2, and R$ 0.24 for F3; the formulations obtained a 90.47% yield. For fibers, the same result (0.96 g-dry basis) was obtained for all three formulations.