cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.6234989.v1
title: Seasonal and spatial evaluation of the surface water quality in the Longá river watershed, Piauí, Brazil

description: Abstract This article evaluates the quality of the surface waters in the Longá River watershed in the State of Piauí, Brazil. Seven points were monitored, based on their proximity to meteorological stations and accessibility, to obtain better spatial and land-use characterizations of the watershed. Water samples were collected monthly (01/2015-12/2015). The variables temperature, pH, turbidity, electrical conductivity, total solids, total phosphorus, nitrate, dissolved oxygen, biochemical oxygen demand (BOD) and Escherichia coli (E. coli) were measured. The results were evaluated individually and compared to Brazilian standards for Class 2 fresh waters, according to the National Environment Council’s (CONAMA) Resolution 357/2005. The data were evaluated using multivariate analyses (clustering and principal component analysis - PCA). E. coli, pH, turbidity, nitrate, BOD, and electrical conductivity varied between the two periods analyzed (dry and rainy). The BOD and E. coli variants were noncompliant with the CONAMA standards at urban points P2, P3, and P5, because of nonpoint source pollution (NPS) during the rainy season. Clustering showed a spatial trend, presenting two distinct groups (rural and urban). PCA identified four main components that explained a 58.64% change in the data. Component 1 (CP1) reflected a contribution of pollutants related to NPS from agricultural and urban areas, in addition to environmental factors. CP2 was strongly associated with pollution, especially by untreated sewage releases. The other CPs also reflect pressures from anthropogenic activities on the water bodies.
DOI: 10.6084/m9.figshare.6151673
title: Assessment of a subtropical riparian forest focusing on botanical, meteorological, ecological characterization and chemical analysis of rainwater

description: Abstract Riparian forests are heterogeneous environments, in which epiphytes find ideal conditions to develop. These plants absorb the necessary nutrients for survival from the atmosphere, and their occurrence and distribution can be influenced by the quality and quantity of precipitation. The objective of this research was to perform an integrated analysis of botanical, meteorological and chemical precipitation parameters so as to compare them in fragments of the riparian forest in the lower (São Leopoldo-SL) and upper (Caraá-CA) stretches of the Rio dos Sinos Hydrographic Basin (RSHB), RS, Brazil. Rainwater was chemically analyzed, the community structure of epiphytic ferns was surveyed and the ecological characterization was evaluated through the Rapid Habitat Assessment Protocol (RHAP). The results showed that the chemical composition of rainwater is influenced by the environment of each area. In the upper stretch (CA), for instance, the main contribution is that of marine ions, while in the lower stretch (SL), the most impacting aspects are urbanization and industrialization. Similarly, the results depict a reduction of richness and a simplification of the community structure of epiphytic ferns and their environmental quality according to the RHAP categories, towards the base level of the RSHB. The integrated analysis, in which different methods were applied, proved to be an efficient tool to evaluate environmental quality. This analysis considers that a greater number of biotic and abiotic variables may be applied in different scenarios.
DOI: 10.6084/m9.figshare.6151673.v1
title: Assessment of a subtropical riparian forest focusing on botanical, meteorological, ecological characterization and chemical analysis of rainwater

description: Abstract Riparian forests are heterogeneous environments, in which epiphytes find ideal conditions to develop. These plants absorb the necessary nutrients for survival from the atmosphere, and their occurrence and distribution can be influenced by the quality and quantity of precipitation. The objective of this research was to perform an integrated analysis of botanical, meteorological and chemical precipitation parameters so as to compare them in fragments of the riparian forest in the lower (São Leopoldo-SL) and upper (Caraá-CA) stretches of the Rio dos Sinos Hydrographic Basin (RSHB), RS, Brazil. Rainwater was chemically analyzed, the community structure of epiphytic ferns was surveyed and the ecological characterization was evaluated through the Rapid Habitat Assessment Protocol (RHAP). The results showed that the chemical composition of rainwater is influenced by the environment of each area. In the upper stretch (CA), for instance, the main contribution is that of marine ions, while in the lower stretch (SL), the most impacting aspects are urbanization and industrialization. Similarly, the results depict a reduction of richness and a simplification of the community structure of epiphytic ferns and their environmental quality according to the RHAP categories, towards the base level of the RSHB. The integrated analysis, in which different methods were applied, proved to be an efficient tool to evaluate environmental quality. This analysis considers that a greater number of biotic and abiotic variables may be applied in different scenarios.
DOI: 10.6084/m9.figshare.6235124.v1
title: Seasonal evaluation of surface and groundwater quality in the area of influence of the Lixão de Salinópolis, PA

description: Abstract This work evaluated the seasonality of surface and groundwater quality in the vicinity of the Salinópolis dump, located in the Cuiarana village, by characterizing precipitation in the region and its influence on the physicochemical and microbiological composition of local waters. To accomplish this, data regarding monthly local precipitation were reviewed, and measurements were taken of the rate of soil infiltration and the rate of flow of the Cachoeira and Teixeira Rivers. The physico-chemical and bacteriological parameters selected were pH, dissolved oxygen (OD), water temperature, total dissolved solids (TDS), turbidity, electrical conductivity (EC), salinity, ammonia, nitrate, total coliforms and Escherichia coli; and the metals aluminum, cadmium, lead, copper, chromium, iron, manganese, mercury, nickel and zinc. Both surface and groundwater were inadequate for human consumption and use. Parameters such as OD, iron, aluminum, lead, mercury, total coliforms and E. coli are not in compliance with current legislation in both surface and underground waters. The rainy season had a negative impact on surface water quality. In groundwater, parameters such as ammonia, nitrate, iron, mercury and lead were higher in the less rainy period, whereas EC, E. coli, total coliforms and aluminum increased their concentrations in the rainy period.
DOI: 10.6084/m9.figshare.6151955
title: Combined use of O3/H2O2 and O3/Mn2+ in flotation of dairy wastewater

description: Abstract This work investigated the degradation of organic matter present in synthetic dairy wastewater by the combination of ozonation (ozone (O3)/hydrogen peroxide (H2O2)) and catalytic ozonation (ozone (O3)/manganese (Mn2+)) associated with dispersed air flotation process. The effect of independent factors such as O3 concentration, pH and H2O2 and Mn2+ concentration was evaluated. For the flotation/O3/H2O2 treatment, the significant variables (p ≤ 0.05) were: O3 concentration (linear and quadratic effect), H2O2 concentration linear and quadratic effect, pH values (linear and quadratic effect) and interaction O3 concentration versus pH. For catalytic ozonation, it was observed that the significant variable was the linear effect of O3 concentration. According to the desirability function, it was concluded that the optimal condition for the treatment of flotation/O3/H2O2 can be obtained in acidic solution using O3 concentrations greater than 42.9 mg L-1 combined with higher concentrations of H2O2 to 1071.5 mg L-1. On other hand, at pH values higher than 9.0, the addition of O3 may be neglected when using higher concentrations than 1071.5 mg L-1 of H2O2. For flotation/ozonation catalyzed by Mn2+, it was observed that metal addition did not affect treatment, resulting in an optimum condition: 53.8 mg L-1 of O3 and pH 3.6.
DOI: 10.6084/m9.figshare.14270031.v1
title: Spirituality and religiosity: knowledge of medical students

description: Abstract The objective of this study was to investigate the knowledge of medical students about spirituality and religiosity in relation to patient care. It is an exploratory, descriptive, quantitative research, based on Spirituality and Brazilian Medical Education, developed in two Medical Schools of Ceará, Brazil. A total of 437 medical students answered a questionnaire, which was processed by descriptive analysis. The results showed that medical students know the meaning and relevance of spirituality and religiosity in the patient care process, however, they do not feel ready to approach the matter in a more complete way because of limitations in academic training. It is concluded that these students need to learn more about the subject for an effective approach to the patient and, therefore, it is important that medical schools add this subject to their curricula.
DOI: 10.6084/m9.figshare.6235124
title: Seasonal evaluation of surface and groundwater quality in the area of influence of the Lixão de Salinópolis, PA

description: Abstract This work evaluated the seasonality of surface and groundwater quality in the vicinity of the Salinópolis dump, located in the Cuiarana village, by characterizing precipitation in the region and its influence on the physicochemical and microbiological composition of local waters. To accomplish this, data regarding monthly local precipitation were reviewed, and measurements were taken of the rate of soil infiltration and the rate of flow of the Cachoeira and Teixeira Rivers. The physico-chemical and bacteriological parameters selected were pH, dissolved oxygen (OD), water temperature, total dissolved solids (TDS), turbidity, electrical conductivity (EC), salinity, ammonia, nitrate, total coliforms and Escherichia coli; and the metals aluminum, cadmium, lead, copper, chromium, iron, manganese, mercury, nickel and zinc. Both surface and groundwater were inadequate for human consumption and use. Parameters such as OD, iron, aluminum, lead, mercury, total coliforms and E. coli are not in compliance with current legislation in both surface and underground waters. The rainy season had a negative impact on surface water quality. In groundwater, parameters such as ammonia, nitrate, iron, mercury and lead were higher in the less rainy period, whereas EC, E. coli, total coliforms and aluminum increased their concentrations in the rainy period.
DOI: 10.6084/m9.figshare.14270031
title: Spirituality and religiosity: knowledge of medical students

description: Abstract The objective of this study was to investigate the knowledge of medical students about spirituality and religiosity in relation to patient care. It is an exploratory, descriptive, quantitative research, based on Spirituality and Brazilian Medical Education, developed in two Medical Schools of Ceará, Brazil. A total of 437 medical students answered a questionnaire, which was processed by descriptive analysis. The results showed that medical students know the meaning and relevance of spirituality and religiosity in the patient care process, however, they do not feel ready to approach the matter in a more complete way because of limitations in academic training. It is concluded that these students need to learn more about the subject for an effective approach to the patient and, therefore, it is important that medical schools add this subject to their curricula.
DOI: 10.6084/m9.figshare.7507085
title: Methodological choices for research in Information Science: Contributions to domain analysis

description: Abstract The article focuses on the ways of organizing studies according to their methodological choices in the Base Referencial de Artigos de Periódicos em Ciência da Informação (Reference Database of Journal articles in Information Science). We highlight how the organization of scientific production by the methodological choices in Information Science contributes to the identification of its production features and domain analysis. We studied research categories and proposed five classification criteria: research purposes, approaches, focus, techniques and type of analysis. The proposal of a corpus in Information Science is empirically applied, represented by 689 articles, 10% of the production indexed in Base Referencial de Artigos de Periódicos em Ciência da Informação from 1972 to 2010. We adopt content analysis to interpret the methodological choices of authors identified in the corpus. The results point out that exploratory studies are more predominant when considering the research purpose; regarding the research approach, bibliographic and documentary studies are more predominant; systematic observation, questionnaire and interview were the most widely used techniques; document analysis and content analysis are the most widely used types of analysis; the research focus of theoretical, historical and bibliometric studies are more predominant. We found that some studies use two methodological choices and explicit epistemological approaches, such as the studies following the positivist approach in the 1970s, and those influenced by the phenomenological approach in the 1980s, which increased the use of methods in qualitative research.
DOI: 10.6084/m9.figshare.11756910
title: PHYSIOLOGICAL AND BIOCHEMICAL RESPONSES OF SUGARCANE VARIETIES TO SALT STRESS

description: ABSTRACT Salt stress is one of the most limiting environmental factors for agricultural yields in the Semiarid region of Brazil. Considering the expansion of areas with sugarcane crops in this region, the selection of more adapted plant varieties to this environment is an essential tool for the sustainability of this activity. Thus, the objective of the present work was to evaluate the physiological and biochemical responses of plants of ten sugarcane varieties to salt stress. The experiment was conducted in a greenhouse using a randomized block design, in a 6×10 factorial arrangement consisting of six salinity levels in the irrigation water (0, 1.0, 2.0, 4.0, 6.0, and 8.0 dS m-1) and ten sugarcane varieties (VAT 90212, RB 72454, RB 867515, Q 124, RB 961003, RB 957508, SP 791011, RB 835089, RB 92579, and SP 943206), with three replications. Salt waters were applied every two days to increase the soil moisture to field capacity and promote leaching. The gas exchange, chlorophyll content, and total soluble and reducing sugars of leaves were evaluated at 90 days after planting. The highest chlorophyll contents were found in plants of the varieties Q 124, RB 96103, RB 835089, and SP 943206. The effect of salinity on the sugarcane plants affected their leaf gas exchanges and total soluble and reducing sugar contents, denoting the adaptability of plants to the stress conditions evaluated. The decrease of stomatal conductance resulted in decreases in photosynthetic rates in plants of all sugarcane varieties evaluated, except for RB 867515.
DOI: 10.6084/m9.figshare.11756910.v1
title: PHYSIOLOGICAL AND BIOCHEMICAL RESPONSES OF SUGARCANE VARIETIES TO SALT STRESS

description: ABSTRACT Salt stress is one of the most limiting environmental factors for agricultural yields in the Semiarid region of Brazil. Considering the expansion of areas with sugarcane crops in this region, the selection of more adapted plant varieties to this environment is an essential tool for the sustainability of this activity. Thus, the objective of the present work was to evaluate the physiological and biochemical responses of plants of ten sugarcane varieties to salt stress. The experiment was conducted in a greenhouse using a randomized block design, in a 6×10 factorial arrangement consisting of six salinity levels in the irrigation water (0, 1.0, 2.0, 4.0, 6.0, and 8.0 dS m-1) and ten sugarcane varieties (VAT 90212, RB 72454, RB 867515, Q 124, RB 961003, RB 957508, SP 791011, RB 835089, RB 92579, and SP 943206), with three replications. Salt waters were applied every two days to increase the soil moisture to field capacity and promote leaching. The gas exchange, chlorophyll content, and total soluble and reducing sugars of leaves were evaluated at 90 days after planting. The highest chlorophyll contents were found in plants of the varieties Q 124, RB 96103, RB 835089, and SP 943206. The effect of salinity on the sugarcane plants affected their leaf gas exchanges and total soluble and reducing sugar contents, denoting the adaptability of plants to the stress conditions evaluated. The decrease of stomatal conductance resulted in decreases in photosynthetic rates in plants of all sugarcane varieties evaluated, except for RB 867515.
DOI: 10.6084/m9.figshare.11756826
title: BARIUM AND LEAD LEVELS IN SITES FOR DISPOSAL OF OIL WELL WASTE

description: ABSTRACT Indiscriminate disposal of waste from the oil industry has led to contamination of soils and water sources and toxic effects in the biota. Thus, this study aimed to assess barium (Ba) and lead (Pb) spatial variability in disposal sites for oil well drilling and prospecting wastes. The soil in the study area is classified as Red Latosol, and the area is located in Santa Maria do Oeste, Paraná State (Brazil). Barium and Pb spatial variabilities were determined using a 76-point sampling grid. The levels of metals were determined in soil samples collected at each sampling point, at the depth ranges of 0.0-0.3, 0.3-0.6, 0.6-0.9 and 0.9-1.2 m. Data were mapped using geostatistical interpolators for spatial dependence determination, modeling and validation of semivariograms, and respective interpolation. Thirty Ba and Pb high concentration samples were selected for leaching and solubilization assays. As semivariogram analysis showed spatial dependence, mapping by ordinary kriging was performed for both metals. The high levels found for both metals arose from well drilling activities, as no direct relationship was found between such levels with geology and genesis of the local rock. The concentrations of the metals were higher than the research values considering the Agricultural / AP-Max scenario, therefore, the study area was characterized as class 4 (contaminated). Although these metals have low solubility, i.e. low contamination risk to subsurface waters, they may pose contamination risks to water bodies by means of soil runoff.
DOI: 10.6084/m9.figshare.7507085.v1
title: Methodological choices for research in Information Science: Contributions to domain analysis

description: Abstract The article focuses on the ways of organizing studies according to their methodological choices in the Base Referencial de Artigos de Periódicos em Ciência da Informação (Reference Database of Journal articles in Information Science). We highlight how the organization of scientific production by the methodological choices in Information Science contributes to the identification of its production features and domain analysis. We studied research categories and proposed five classification criteria: research purposes, approaches, focus, techniques and type of analysis. The proposal of a corpus in Information Science is empirically applied, represented by 689 articles, 10% of the production indexed in Base Referencial de Artigos de Periódicos em Ciência da Informação from 1972 to 2010. We adopt content analysis to interpret the methodological choices of authors identified in the corpus. The results point out that exploratory studies are more predominant when considering the research purpose; regarding the research approach, bibliographic and documentary studies are more predominant; systematic observation, questionnaire and interview were the most widely used techniques; document analysis and content analysis are the most widely used types of analysis; the research focus of theoretical, historical and bibliometric studies are more predominant. We found that some studies use two methodological choices and explicit epistemological approaches, such as the studies following the positivist approach in the 1970s, and those influenced by the phenomenological approach in the 1980s, which increased the use of methods in qualitative research.
DOI: 10.6084/m9.figshare.11756826.v1
title: BARIUM AND LEAD LEVELS IN SITES FOR DISPOSAL OF OIL WELL WASTE

description: ABSTRACT Indiscriminate disposal of waste from the oil industry has led to contamination of soils and water sources and toxic effects in the biota. Thus, this study aimed to assess barium (Ba) and lead (Pb) spatial variability in disposal sites for oil well drilling and prospecting wastes. The soil in the study area is classified as Red Latosol, and the area is located in Santa Maria do Oeste, Paraná State (Brazil). Barium and Pb spatial variabilities were determined using a 76-point sampling grid. The levels of metals were determined in soil samples collected at each sampling point, at the depth ranges of 0.0-0.3, 0.3-0.6, 0.6-0.9 and 0.9-1.2 m. Data were mapped using geostatistical interpolators for spatial dependence determination, modeling and validation of semivariograms, and respective interpolation. Thirty Ba and Pb high concentration samples were selected for leaching and solubilization assays. As semivariogram analysis showed spatial dependence, mapping by ordinary kriging was performed for both metals. The high levels found for both metals arose from well drilling activities, as no direct relationship was found between such levels with geology and genesis of the local rock. The concentrations of the metals were higher than the research values considering the Agricultural / AP-Max scenario, therefore, the study area was characterized as class 4 (contaminated). Although these metals have low solubility, i.e. low contamination risk to subsurface waters, they may pose contamination risks to water bodies by means of soil runoff.
DOI: 10.6084/m9.figshare.7974062
title: Nutrient Cycling in Corymbia citriodora in the State of Rio de Janeiro, Brazil

description: ABSTRACT The quantification and transfer of nutrient stock among compartments in the forest environment is the key to understanding the nutrient cycling process. The aim of this study was to quantify the nutrient stock and dynamics by litter deposition in a Corymbia citriodora settlement in the Mountainous region of the State of Rio de Janeiro. Different plant parts, deciduous material and litter were chemically analyzed for nutrients. The biomass of trees was 127.23 Mg ha-1, making up about 85.8% of the nutrient stock. On average, the nutrient flux represented 13.6% of nutrients stored in the biomass above the soil. The nutrient cycling process involving N, P, K Ca, and Mg in the long-rotation Corymbia citriodora crop represents an important strategy for maintaining productivity of the forest site.
DOI: 10.6084/m9.figshare.7974062.v1
title: Nutrient Cycling in Corymbia citriodora in the State of Rio de Janeiro, Brazil

description: ABSTRACT The quantification and transfer of nutrient stock among compartments in the forest environment is the key to understanding the nutrient cycling process. The aim of this study was to quantify the nutrient stock and dynamics by litter deposition in a Corymbia citriodora settlement in the Mountainous region of the State of Rio de Janeiro. Different plant parts, deciduous material and litter were chemically analyzed for nutrients. The biomass of trees was 127.23 Mg ha-1, making up about 85.8% of the nutrient stock. On average, the nutrient flux represented 13.6% of nutrients stored in the biomass above the soil. The nutrient cycling process involving N, P, K Ca, and Mg in the long-rotation Corymbia citriodora crop represents an important strategy for maintaining productivity of the forest site.