cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.7367705
title: Paleoenvironmental Characterization of a High-Mountain Environment in the Atlantic Forest in Southeastern Brazil

description: ABSTRACT: Records of changes in the phytosociological structure of vegetation can be observed more clearly in soils that have more significant accumulation of organic matter, like those occurring in high-mountain environments. The aim of this study was to characterize soils formed in high-mountain environments in the Itatiaia National Park (INP), state of Rio de Janeiro, southeastern Brazil, and to discuss the potential of preserved phytoliths as markers of vegetative history and environmental factors. Four profiles were selected, which were morphologically described and evaluated for their physical and chemical properties. For phytolith analysis and high-resolution determination of the stable carbon isotopes, samples were collected at 0.10 m intervals. The profiles showed highly similar morphological characteristics, with peat deposits and colluvial sediments as source material, produced in the highest parts of the landscape. High-mountain soils in the INP have properties related to high contents of organic matter, like high acidity, low base saturation, and high CEC values due to high H+ contents. The soils are formed by the addition of plant residues, which accumulate due to the cold and humid climate during most of the year in these environments. The phytolith assemblage had a high frequency of morphotypes characteristic of temperate, cold, and high elevation intertropical regions, especially of Pooideae plants. The phytolith indexes indicated open vegetation environments with a predominance of C3 grasses, suggesting cold climate conditions, and corroborating the δ13C isotopic values. The results of phytolith analysis of the profiles reflected characteristics related to soil genesis. Organism is the main soil formation factor, conditioned by the factors relief (elevation) and climate, which resulted in low temperatures and lead organic matter accumulation.
DOI: 10.6084/m9.figshare.7367711.v1
title: Growth Dynamic of Allogeneic and Autogenous Bone Grafts in a Vertical Model

description: Abstract Several techniques have been proposed for vertical bone regeneration, and many of them use bone autogenous and allogeneic grafts. The purpose of this study was to compare demineralised freeze-dried bone allografts (DFDBA), fresh-frozen (FF) allografts, autogenous bone grafts to find differences between volumetric and histological quantity of bone formation and vertical bone growth dynamic. A vertical tissue regeneration bone model was performed in rabbit calvarias under general anaesthesia. Four hollow cylinders of pure titanium were screwed onto external cortical bone calvarias in eight rabbits. Each one of the cylinders was randomly filled with one intervention: DFDBA, FF, autogenous bone, or left to be filled with blood clot (BC) as control. Allogeneic grafts were obtained from a ninth animal following international standardised protocols for the harvesting, processing, and cryopreservation of allografts. Autogenous graft was obtained from the host femur scraping before adapting hollow cylinders. Animals were euthanized at 13 weeks. Vertical volume was calculated after probe device measurements of the new formed tissue inside the cylinders and after titanium cylinders were removed. Histomorphometry and fluorochrome staining were used to analyse quantity and dynamic of bone formation, respectively. Results showed that DFDBA and fresh-frozen bone improved the velocity and the quantity of bone deposition in distant portions of the basal plane of grafting. Remaining material in allograft groups was more intense than in autogenous group. Both allografts can be indicated as reliable alternatives for volume gain and vertical bone augmentation.
DOI: 10.6084/m9.figshare.7367699
title: Association between estimated glomerular filtration rate and sodium excretion in urine of African descendants in Brazil: a population-based study

description: ABSTRACT Introduction: Excessive salt intake is a risk factor for the development of chronic kidney disease (CKD). Objective: To evaluate the association between estimated glomerular filtration rate (eGFR) and sodium excretion in urine samples of Brazilians of African ancestry. Methods: Cross-sectional, population-based study of 1,211 Brazilians of African ancestry living in Alcântara City, Maranhão, Brazil. Demographic, nutritional, clinical, and laboratory data were analyzed. The urinary excretion of sodium was estimated using the Kawasaki equation. Calculations of eGFR were based on the Chronic Kidney Disease Epidemiology Collaboration equation. Multivariate linear-regression model was used to identify the relationship between sodium excretion and eGFR. Results: Mean age was 37.5±11.7 years and 52.8% were women. Mean urinary excretion of sodium was 204.6±15.3 mmol/day and eGFR was 111.8±15.3 mL/min/1.73m2. According to multivariate linear regression, GFR was independently correlated with sodium excretion (β=0.11; p&lt;0.001), age (β=-0.67; p&lt;0.001), female sex (β=-0.20; p&lt;0.001), and body mass index (BMI; β=-0.09; p&lt;0.001). Conclusions: The present study showed that age, female sex, BMI, and correlated negatively with eGFR. Sodium excretion was the only variable that showed a positive correlation with eGFR, indicating that high levels of urinary sodium excretion may contribute to hyperfiltration with potentially harmful consequences.
DOI: 10.6084/m9.figshare.7367705.v1
title: Paleoenvironmental Characterization of a High-Mountain Environment in the Atlantic Forest in Southeastern Brazil

description: ABSTRACT: Records of changes in the phytosociological structure of vegetation can be observed more clearly in soils that have more significant accumulation of organic matter, like those occurring in high-mountain environments. The aim of this study was to characterize soils formed in high-mountain environments in the Itatiaia National Park (INP), state of Rio de Janeiro, southeastern Brazil, and to discuss the potential of preserved phytoliths as markers of vegetative history and environmental factors. Four profiles were selected, which were morphologically described and evaluated for their physical and chemical properties. For phytolith analysis and high-resolution determination of the stable carbon isotopes, samples were collected at 0.10 m intervals. The profiles showed highly similar morphological characteristics, with peat deposits and colluvial sediments as source material, produced in the highest parts of the landscape. High-mountain soils in the INP have properties related to high contents of organic matter, like high acidity, low base saturation, and high CEC values due to high H+ contents. The soils are formed by the addition of plant residues, which accumulate due to the cold and humid climate during most of the year in these environments. The phytolith assemblage had a high frequency of morphotypes characteristic of temperate, cold, and high elevation intertropical regions, especially of Pooideae plants. The phytolith indexes indicated open vegetation environments with a predominance of C3 grasses, suggesting cold climate conditions, and corroborating the δ13C isotopic values. The results of phytolith analysis of the profiles reflected characteristics related to soil genesis. Organism is the main soil formation factor, conditioned by the factors relief (elevation) and climate, which resulted in low temperatures and lead organic matter accumulation.
DOI: 10.7284/103634
title: Gravimeter data collected during research cruise OC449-10 using a Bell BGM-3 instrument system onboard the platform RV Oceanus

description: Original (unprocessed) data collected during a Field_expedition
DOI: 10.6084/m9.figshare.7367699.v1
title: Association between estimated glomerular filtration rate and sodium excretion in urine of African descendants in Brazil: a population-based study

description: ABSTRACT Introduction: Excessive salt intake is a risk factor for the development of chronic kidney disease (CKD). Objective: To evaluate the association between estimated glomerular filtration rate (eGFR) and sodium excretion in urine samples of Brazilians of African ancestry. Methods: Cross-sectional, population-based study of 1,211 Brazilians of African ancestry living in Alcântara City, Maranhão, Brazil. Demographic, nutritional, clinical, and laboratory data were analyzed. The urinary excretion of sodium was estimated using the Kawasaki equation. Calculations of eGFR were based on the Chronic Kidney Disease Epidemiology Collaboration equation. Multivariate linear-regression model was used to identify the relationship between sodium excretion and eGFR. Results: Mean age was 37.5±11.7 years and 52.8% were women. Mean urinary excretion of sodium was 204.6±15.3 mmol/day and eGFR was 111.8±15.3 mL/min/1.73m2. According to multivariate linear regression, GFR was independently correlated with sodium excretion (β=0.11; p&lt;0.001), age (β=-0.67; p&lt;0.001), female sex (β=-0.20; p&lt;0.001), and body mass index (BMI; β=-0.09; p&lt;0.001). Conclusions: The present study showed that age, female sex, BMI, and correlated negatively with eGFR. Sodium excretion was the only variable that showed a positive correlation with eGFR, indicating that high levels of urinary sodium excretion may contribute to hyperfiltration with potentially harmful consequences.
DOI: 10.6084/m9.figshare.7367690
title: 2- Isopentenyladenine in the induction of direct somatic embryogenesis capacity of Coffea arabica L.

description: ABSTRACT: This study evaluated the effect of different concentrations of 2-isopentenyladenine (2-iP) on the direct somatic embryogenesis capacity of the Mundo Novo cultivar of Coffea arabica. Leaf explants were cultivated with half the MS salt concentration and the addition of sucrose (20gL-1) and 2-iP (0; 2.5; 5; 7.5 and 10µM). The 2-iP doses of 7.5 and 10µM produced the greatest responses with respect to the percentage of explants with embryogenic structures and the size of the embryogenic structures. However, the greatest production of somatic embryos occurred on the explants treated with 10µM of 2-iP, followed by 7.5µM, whereas their production was absent or reduced with 0 and 5µM, respectively.
DOI: 10.6084/m9.figshare.7367690.v1
title: 2- Isopentenyladenine in the induction of direct somatic embryogenesis capacity of Coffea arabica L.

description: ABSTRACT: This study evaluated the effect of different concentrations of 2-isopentenyladenine (2-iP) on the direct somatic embryogenesis capacity of the Mundo Novo cultivar of Coffea arabica. Leaf explants were cultivated with half the MS salt concentration and the addition of sucrose (20gL-1) and 2-iP (0; 2.5; 5; 7.5 and 10µM). The 2-iP doses of 7.5 and 10µM produced the greatest responses with respect to the percentage of explants with embryogenic structures and the size of the embryogenic structures. However, the greatest production of somatic embryos occurred on the explants treated with 10µM of 2-iP, followed by 7.5µM, whereas their production was absent or reduced with 0 and 5µM, respectively.
DOI: 10.7284/110125
title: Singlebeam Echosounder data collected during research cruise OC449-10 using a Knudsen 320B/R instrument system onboard the platform RV Oceanus

description: Original (unprocessed) data collected during a Field_expedition
DOI: 10.7284/101402
title: Multiplexed data collected during research cruise OC451 using a WHOI Calliope instrument system onboard the platform RV Oceanus

description: Original (unprocessed) data collected during a Field_expedition
DOI: 10.6084/m9.figshare.7367672
title: Periphytic Actinella Lewis (Ochrophyta, Bacillariophyceae) species from an Environmental Protection Area in the Brazilian Amazon

description: Abstract Aim The aim of this study is to present the Actinella species found in periphytic samples collected from an Environmental Protection Area in Santarém (PA, Brazil), to comment on their morphology by comparing them with existing records, and to increase knowledge of the distribution of the genus in Pará State. Methods Ten periphytic samples were collected from seven sampling stations in the Alter do Chão Environmental Protection Area (Santarém, Pará, Brazil) in October 2015 and February and July 2016. Dissolved oxygen, pH, conductivity and water temperature were measured in the field at sites from which samples were collected in 2016. Samples were oxidized and analyzed by light microscopy. Results The sampled water bodies presented low conductivity and an acidic pH. We identified 12 Actinella taxa, several of which had originally been described from samples collected from the Amazon in the mid-20th century, mainly in the lower Tapajós River region. Actinella rionegrensis is recorded for the first time in the State of Pará, outside of its type locality (Negro River, near Manaus, AM, Brazil), and the species habitus (wisp-shaped colonies) is recorded for the first time. Conclusion Our results indicate that the Environmental Protection Area has been effective in conserving the aquatic ecosystem, since Actinella species identified in the mid-20 th century are still present. Taxonomic issues for some species of this genus need clarification and revision, since overlapping diagnostic features occur among species and with species belonging to the genus Eunotia.
DOI: 10.6084/m9.figshare.7367675
title: Absorptive capacity, exploration, and exploitation: an analysis of the companies in Palmas, Tocantins

description: Abstract This research is about the relationship between the exploitation, exploration, and absorptive capacity of the organizational knowledge. The three themes are of great importance to the sustainable competitive advantage of organizations. In general, although they are inserted in the discussion of organizational learning, they are still in the evolutionary process regarding antecedents, moderators, and outcomes, as can be observed in the theoretical reference. It has not been possible to identify studies with similar characteristics as the one presented here, i.e., studies linking exploration and exploitation with absorptive capacity, particularly in the Brazilian context. The main objective was to evaluate the degree of association between exploration, exploitation, and absorptive capacity. This study used quantitative research in 100 companies operating in commerce and services sectors, all located in the city of Palmas, Tocantins State. The sector was chosen based on the concentration of commercial and services companies in the city. The informants were the managers who worked in these companies. The questionnaire involved the use of two scales: one scale for the measurement of exploration and exploitation, and the other scale for measuring the absorptive capacity, both validated by early studies. The technique involved structural equation modeling using Partial Least Square-Path Modeling (PLS-PM) software was used for the verification of the principal hypothesis. The concepts of exploration and exploitation were based on six dimensions: organizational knowledge practices, innovation practices, strategic orientation, competition, partnerships, and efficiency. The concept of absorptive capacity was based on four dimensions: porosity, routines and structures, public knowledge, and individual abilities. The results showed that companies had exploitation orientation. Regarding the absorptive capacity, companies had a high relationship with the environment, with routines and with procedures, and with public knowledge. The main hypothesis was confirmed, indicating a positive relationship between exploration, exploitation, and absorptive capacity.
DOI: 10.6084/m9.figshare.7367678
title: Drying temperature changes trichome integrity, chemical content and composition of the essential oil of pepper-rosmarin

description: ABSTRACT: Medicinal plants are generally commercialized dried. However, temperatures used in their drying processes may interfere with the content and chemical composition of their essential oils. The Lippia origanoides possesses thymol in the essential oil that is stored in glandular trichomes. Thymol is a major component of economic importance in the chemical and pharmaceutical industry. The objective of this study was to evaluate the effect of the drying temperatures of L. origanoides leaves regarding trichome integrity, content, and chemical composition of the essential oil. The experimental design was completely randomized with four treatments defined by oven drying temperatures (40, 50, 60, and 70ºC) and four replications. Essential oil was extracted by hydro distillation and the essential oil contents were determined (%). Chemical composition of the oil was analyzed by gas chromatography coupled to mass spectrometry. Scanning electron microscopy was carried out to determine trichome integrity. Drying the L. origanoides leaves in a forced ventilation oven at 40°C minimized the loss of extracted essential oil content (17.5g kg-1) and relative thymol percentage. Leaves dried at the temperatures of 60 and 70ºC exhibited a higher percentage of ruptured trichomes and reduced essential oil content to 13.7g kg-1 and 11.8g kg-1, respectively.
DOI: 10.6084/m9.figshare.7367672.v1
title: Periphytic Actinella Lewis (Ochrophyta, Bacillariophyceae) species from an Environmental Protection Area in the Brazilian Amazon

description: Abstract Aim The aim of this study is to present the Actinella species found in periphytic samples collected from an Environmental Protection Area in Santarém (PA, Brazil), to comment on their morphology by comparing them with existing records, and to increase knowledge of the distribution of the genus in Pará State. Methods Ten periphytic samples were collected from seven sampling stations in the Alter do Chão Environmental Protection Area (Santarém, Pará, Brazil) in October 2015 and February and July 2016. Dissolved oxygen, pH, conductivity and water temperature were measured in the field at sites from which samples were collected in 2016. Samples were oxidized and analyzed by light microscopy. Results The sampled water bodies presented low conductivity and an acidic pH. We identified 12 Actinella taxa, several of which had originally been described from samples collected from the Amazon in the mid-20th century, mainly in the lower Tapajós River region. Actinella rionegrensis is recorded for the first time in the State of Pará, outside of its type locality (Negro River, near Manaus, AM, Brazil), and the species habitus (wisp-shaped colonies) is recorded for the first time. Conclusion Our results indicate that the Environmental Protection Area has been effective in conserving the aquatic ecosystem, since Actinella species identified in the mid-20 th century are still present. Taxonomic issues for some species of this genus need clarification and revision, since overlapping diagnostic features occur among species and with species belonging to the genus Eunotia.
DOI: 10.6084/m9.figshare.7367678.v1
title: Drying temperature changes trichome integrity, chemical content and composition of the essential oil of pepper-rosmarin

description: ABSTRACT: Medicinal plants are generally commercialized dried. However, temperatures used in their drying processes may interfere with the content and chemical composition of their essential oils. The Lippia origanoides possesses thymol in the essential oil that is stored in glandular trichomes. Thymol is a major component of economic importance in the chemical and pharmaceutical industry. The objective of this study was to evaluate the effect of the drying temperatures of L. origanoides leaves regarding trichome integrity, content, and chemical composition of the essential oil. The experimental design was completely randomized with four treatments defined by oven drying temperatures (40, 50, 60, and 70ºC) and four replications. Essential oil was extracted by hydro distillation and the essential oil contents were determined (%). Chemical composition of the oil was analyzed by gas chromatography coupled to mass spectrometry. Scanning electron microscopy was carried out to determine trichome integrity. Drying the L. origanoides leaves in a forced ventilation oven at 40°C minimized the loss of extracted essential oil content (17.5g kg-1) and relative thymol percentage. Leaves dried at the temperatures of 60 and 70ºC exhibited a higher percentage of ruptured trichomes and reduced essential oil content to 13.7g kg-1 and 11.8g kg-1, respectively.
DOI: 10.7284/103091
title: Multiplexed data collected during research cruise OC451 using a WHOI Athena instrument system onboard the platform RV Oceanus

description: Original (unprocessed) data collected during a Field_expedition
DOI: 10.6084/m9.figshare.7367675.v1
title: Absorptive capacity, exploration, and exploitation: an analysis of the companies in Palmas, Tocantins

description: Abstract This research is about the relationship between the exploitation, exploration, and absorptive capacity of the organizational knowledge. The three themes are of great importance to the sustainable competitive advantage of organizations. In general, although they are inserted in the discussion of organizational learning, they are still in the evolutionary process regarding antecedents, moderators, and outcomes, as can be observed in the theoretical reference. It has not been possible to identify studies with similar characteristics as the one presented here, i.e., studies linking exploration and exploitation with absorptive capacity, particularly in the Brazilian context. The main objective was to evaluate the degree of association between exploration, exploitation, and absorptive capacity. This study used quantitative research in 100 companies operating in commerce and services sectors, all located in the city of Palmas, Tocantins State. The sector was chosen based on the concentration of commercial and services companies in the city. The informants were the managers who worked in these companies. The questionnaire involved the use of two scales: one scale for the measurement of exploration and exploitation, and the other scale for measuring the absorptive capacity, both validated by early studies. The technique involved structural equation modeling using Partial Least Square-Path Modeling (PLS-PM) software was used for the verification of the principal hypothesis. The concepts of exploration and exploitation were based on six dimensions: organizational knowledge practices, innovation practices, strategic orientation, competition, partnerships, and efficiency. The concept of absorptive capacity was based on four dimensions: porosity, routines and structures, public knowledge, and individual abilities. The results showed that companies had exploitation orientation. Regarding the absorptive capacity, companies had a high relationship with the environment, with routines and with procedures, and with public knowledge. The main hypothesis was confirmed, indicating a positive relationship between exploration, exploitation, and absorptive capacity.