cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.7187177.v1
title: A brief review about melatonin, a pineal hormone

description: ABSTRACT Melatonin is a ubiquitous molecule in nature, being locally synthesized in several cells and tissues, besides being a hormone that is centrally produced in the pineal gland of vertebrates, particularly in mammals. Its pineal synthesis is timed by the suprachiasmatic nucleus, that is synchronized to the light-dark cycle via the retinohypothalamic tract, placing melatonin synthesis at night, provided its dark. This unique trait turns melatonin into an internal synchronizer that adequately times the organism's physiology to the daily and seasonal demands. Besides being amphiphilic, melatonin presents specific mechanisms and ways of action devoted to its role as a time-giving agent, being widely spread in the organism. The present review aims to focus on melatonin as a pineal hormone with specific mechanisms and ways of action, besides presenting the clinical syndromes related to its synthesis and/or function disruptions.
DOI: 10.6084/m9.figshare.7517042.v1
title: Calcium intake: good for the bones but bad for the heart? An analysis of clinical studies

description: ABSTRACT The proper dietary calcium intake and calcium supplementation, when indicated, are important factors in the acquisition of peak bone mass during youth and in the prevention of fractures in old age. In addition to its deposition in bone, calcium confers an increase in its resistance and exhibits important activities in different enzymatic pathways in the body (e.g., neural, hormonal, muscle-related and blood clotting pathways). Thus, calcium supplementation can directly or indirectly affect important functions in the body, such as the control of blood pressure, plasma glucose, body weight, lipid profile and endothelial function. Since one publication reported increased cardiovascular risk due to calcium supplementation, many researchers have studied whether this risk actually exists; the results are conflicting, and the involved mechanisms are uncertain. However, studies that have evaluated the influence of the consumption of foods rich in calcium have reported no increase in the cardiovascular risk, which suggests that nutritional intake should be prioritized as a method for supplementation and that the use of calcium supplements should be reserved for patients who truly need supplementation and are unable to achieve the recommended daily nutritional intake of calcium.
DOI: 10.6084/m9.figshare.7185506
title: The Epistemic and Aesthetic Delinking of Decolonial Theatre

description: Abstract: The article consists in crossing decolonial studies, history and aesthetics. I highlight how the Modernity/Coloniality dualism not only creates an epistemic hegemony but also an aesthetical domination, and I show the postmodern theater unability to untangle itself from the colonial roots of power. Through the analysis of Kay pacha - written by the equatorian activist and playwriter Juan Francisco Moreno Montenegro - I determine the defining features of a decolonial work. In doing so I carry out an epistemic and aesthetic. The kind of empirical approach stresses the european bias of the tools dramaturgical, which are useless to comprehend a decolonial piece of work.
DOI: 10.6084/m9.figshare.7185506.v1
title: The Epistemic and Aesthetic Delinking of Decolonial Theatre

description: Abstract: The article consists in crossing decolonial studies, history and aesthetics. I highlight how the Modernity/Coloniality dualism not only creates an epistemic hegemony but also an aesthetical domination, and I show the postmodern theater unability to untangle itself from the colonial roots of power. Through the analysis of Kay pacha - written by the equatorian activist and playwriter Juan Francisco Moreno Montenegro - I determine the defining features of a decolonial work. In doing so I carry out an epistemic and aesthetic. The kind of empirical approach stresses the european bias of the tools dramaturgical, which are useless to comprehend a decolonial piece of work.
DOI: 10.6084/m9.figshare.7515440
title: Influence of water pH in oral changes caused by cadmium poisoning: an experimental study in rats

description: Objective: This study aims to evaluate the effect of the pH of drinking water in the oral changes caused by cadmium poisoning.Material and method: Ninety male Wister rats were divided into the following six groups: A - 15 rats were given cadmium chloride solution (400 mg/L) in drinking water with a neutral pH (pH 7.0); B - 15 rats received cadmium chloride solution (400 mg/L) in drinking water with an acidic pH (pH 5.0); C - 15 rats were treated with a cadmium chloride solution (400 mg/L) in drinking water with a basic pH (pH 8.0); D - 15 rats received drinking water with an acidic pH (pH 5.0); E - 15 rats were given drinking water with a basic pH (pH 8.0); F - 15 rats received water with a neutral pH (pH 7.0). All animals were sacrificed six months after the beginning of the experiment. A biopsy of the buccal mucosa, tongue and salivary gland of each animal was taken for microscopic analysis.Result: No changes were observed in the buccal mucosa, tongue mucosa or salivary glands in any of the groups.Conclusion:Drinking water that contains a high concentration of cadmium with differing pH levels demonstrated no damage to the oral mucosa and salivary glands of male Wistar rats.
DOI: 10.6084/m9.figshare.7515440.v1
title: Influence of water pH in oral changes caused by cadmium poisoning: an experimental study in rats

description: Objective: This study aims to evaluate the effect of the pH of drinking water in the oral changes caused by cadmium poisoning.Material and method: Ninety male Wister rats were divided into the following six groups: A - 15 rats were given cadmium chloride solution (400 mg/L) in drinking water with a neutral pH (pH 7.0); B - 15 rats received cadmium chloride solution (400 mg/L) in drinking water with an acidic pH (pH 5.0); C - 15 rats were treated with a cadmium chloride solution (400 mg/L) in drinking water with a basic pH (pH 8.0); D - 15 rats received drinking water with an acidic pH (pH 5.0); E - 15 rats were given drinking water with a basic pH (pH 8.0); F - 15 rats received water with a neutral pH (pH 7.0). All animals were sacrificed six months after the beginning of the experiment. A biopsy of the buccal mucosa, tongue and salivary gland of each animal was taken for microscopic analysis.Result: No changes were observed in the buccal mucosa, tongue mucosa or salivary glands in any of the groups.Conclusion:Drinking water that contains a high concentration of cadmium with differing pH levels demonstrated no damage to the oral mucosa and salivary glands of male Wistar rats.
DOI: 10.6084/m9.figshare.7185437
title: Chromium, iron, gold and manganese in Amapá and northern Pará, Brazil

description: ABSTRACT: Information is presented on the geology and mineral deposits in greenstone belts and mafic-ultramafic complexes in Amapá and northern Pará, with the emphasis in iron, gold, manganese, and chromium. At Santa Maria, the Vila Nova Group presents deposits of iron and gold, the latter in carbonatic metasediments crossed by a north-south shear. The group is intruded by the Bacuri Mafic-Ultramafic Complex, with mineable deposits of chromite and magnetite. The overlaying 21 Grande Formation presents minor gold mineralization. At Serra das Coambas there is a significant show of iron formation, and, at its flank, the 21 Grande Formation presents extensive areas exploited by gold miners for gold. Serra do Ipitinga, in Pará, contains the greatest units of iron formation of the area, accompanied by frequent shows of alluvial and primary gold mineralization. The distribution of manganesiferous metasediments identified by mining companies indicate that they were deposited in an about 90 km long narrow basin oriented to northwest, with Serra do Navio near its center. The exposures of iron formation indicate that they were deposited on a belt greater than 350 km long and 100 km wide, oriented and still open to northeast, covering areas of different ages of metamorphism and tectonical stabilization.
DOI: 10.6084/m9.figshare.7514789
title: Simulation model of DO and BOD integrating river and reservoir applied to the Tietê River

description: ABSTRACT A simulation model of DO and BOD combining rivers and reservoirs, was developed in the software Microsoft Office Excel and used in the Tietê river, stretch between Pirapora do Bom Jesus and Salto, known to be polluted due to the receipt of the remaining organic load contribution to Metropolitan Region of São Paulo. The calibration used to monitored data and optimization tools. They were simulated 12 scenarios characterized by the combination of the variables: discharged flow (700, 411 and 130 m3/s), level of the reservoir (691 and 688 m), and input concentration of BOD to Pirapora reservoir (37 and 56 mgO2/L). With these analysis of the scenarios was possible to evaluate the impacts of reservoir operation on the water quality of the Tietê River downstream of this dam. The results indicated that the water quality to input on reservoir protrudes towards the operational aspects. Reduce the contribution that organic load refers to a long-term planning. A short-term alternative is to minimize the impacts operate with low discharge reservoir (130 m3/s), while keeping the normal level (691 m). Thus, when the input concentration of BOD is high (56 mgO2/L), the stretch between Pirapora do Bom Jesus and Cabreúva is anoxic and the region of Salto presents DO and BOD concentrations of 3 and 20 mgO2/L, respectively. When normal (37 mgO2/L), is not found anaerobic conditions throughout the simulated stretch and the region of Salto presents concentrations of 6 mgO2/L and BOD equal to 17 mgO2/L.
DOI: 10.6084/m9.figshare.11997495
title: Study of Manufacturing Processes for Liquid Rocket Turbopump Impellers: Test and Analysis

description: Abstract: In the context of the cooperative development of the L75 Liquid Rocket Engine (with 75 kN of thrust) and in the frame of a global enlargement of competence in the field of turbomachines for liquid rocket propulsion systems, Institute of Space Propulsion of the German Aerospace Center (DLR; in German, Deutsches Zentrum für Luft- und Raumfahrt), in Lampoldshausen, and the Brazilian Institute of Aeronautics and Space (IAE; in Portuguese, Instituto de Aeronáutica e Espaço) have managed to produce its first flight ready components for pumps in liquid rocket propulsion systems. Among these components was a series of prototyped shrouded impellers for the oxidizer pumps manufactured in different materials and by different fabrication processes executed by four independent Brazilian and German workshops. Non-destructive and destructive testing methods have been applied for impellers materials validation, and for manufacturing processes verification. A special attention was given to the spin tests results and analysis, which included verification at maximum operational speed and burst testing, in order to determine the failure speed. Each tested impeller reached the required specification for the application in the L75 turbopump. Spin test logic and test results are discussed later on. Therefore, the scope of the present study is to investigate several traditional and cutting-edge processes applied for shrouded turbopump impellers manufacturing. A verification and validation of these processes will also be discussed.
DOI: 10.6084/m9.figshare.7510145
title: Maxillofacial lesions: a survey of 762 cases from the Federal University of Sergipe, Brazil

description: Introduction: Epidemiological survey of maxillofacial lesions in a specific geographic region establishes the real needs of this population and guides health professionals in defining preventive actions and appropriate treatment.Objective: To analyze the histopathological diagnosis of maxillofacial lesions issued in the period 1996-2011 managed by the Laboratory of Oral Pathology, Department of Dentistry, Federal University of Sergipe, Brazil.Material and method: A retrospective study of biopsies removed from 1996-2011 was conducted, recovering data related to gender and age of the patients, location of the lesions and histopathological diagnosis. The lesions were grouped into eight diagnostic categories: benign neoplasms, potentially malignant lesions, malignant neoplasms, inflammatory lesions, odontogenic lesions, bone lesions, salivary gland lesions and malformations and developmental anomalies.Result: 762 reports were analyzed, with a higher prevalence of inflammatory lesions (n = 205, 26.9 %). The most common diagnosis among benign neoplasms was the peripheral giant cell granuloma (n=15), among potentially malignant lesions was the epithelial dysplasia (n=80), and in the malignant neoplasm group the most common lesion was the squamous cells carcinoma. (n=29). Analyzing the group of inflammatory lesions, we observed that the prevalent lesion was inflammatory fibrous hyperplasia (n=74). Periapical granuloma was the lesion that appeared most commonly among odontogenic lesions. The prevalent lesion among bone lesions was central ossifying fibroma (n=08), among salivary gland lesions was mucous retention (n=64), in the group of developmental anomalies the prevalent lesion was melanocytic macule (n=04).Conclusion: The findings of this survey highlight the importance in developing treatment plans and educational measures to prevent and reduce patients' exposure to risk factors.
DOI: 10.6084/m9.figshare.11997495.v1
title: Study of Manufacturing Processes for Liquid Rocket Turbopump Impellers: Test and Analysis

description: Abstract: In the context of the cooperative development of the L75 Liquid Rocket Engine (with 75 kN of thrust) and in the frame of a global enlargement of competence in the field of turbomachines for liquid rocket propulsion systems, Institute of Space Propulsion of the German Aerospace Center (DLR; in German, Deutsches Zentrum für Luft- und Raumfahrt), in Lampoldshausen, and the Brazilian Institute of Aeronautics and Space (IAE; in Portuguese, Instituto de Aeronáutica e Espaço) have managed to produce its first flight ready components for pumps in liquid rocket propulsion systems. Among these components was a series of prototyped shrouded impellers for the oxidizer pumps manufactured in different materials and by different fabrication processes executed by four independent Brazilian and German workshops. Non-destructive and destructive testing methods have been applied for impellers materials validation, and for manufacturing processes verification. A special attention was given to the spin tests results and analysis, which included verification at maximum operational speed and burst testing, in order to determine the failure speed. Each tested impeller reached the required specification for the application in the L75 turbopump. Spin test logic and test results are discussed later on. Therefore, the scope of the present study is to investigate several traditional and cutting-edge processes applied for shrouded turbopump impellers manufacturing. A verification and validation of these processes will also be discussed.
DOI: 10.6084/m9.figshare.12094770
title: Developing a Mathematical Modelling Code for Keeping the Power of Multi Turbocharged Engines at Flight Altitudes

description: ABSTRACT: In this paper, a code is developed in C++ programming language aiming to select and introduce a well-chosen propulsion system for appropriate operation in an aircraft. By using a suitable turbocharged engine, the inlet pressure of the engine manifold will increase to a level equal to the pressure at sea level. Therefore, the aircraft engine will not notice the drop of pressure caused by the increase in altitude. Consequently, the engine power will not be reduced. On the other hand, at high altitude, using only one turbocharger is not adequate to supply engine inlet pressure and flow rate equivalent to sea level conditions, requiring the use of more turbochargers. The code developed in this study will be able to introduce the appropriate turbocharged engine based on the flight altitude and the required power engine of an air vehicle. The altitude defined in this code ranges from 5 to 30 kilometers, which leads to a selection of one to three turbochargers plus a number of intercoolers, according to user input parameters. The objective function of this optimization problem is defined as a function of turbochargers efficiency. However, this objective function can be modified according to the user requests and requirements.
DOI: 10.6084/m9.figshare.7510145.v1
title: Maxillofacial lesions: a survey of 762 cases from the Federal University of Sergipe, Brazil

description: Introduction: Epidemiological survey of maxillofacial lesions in a specific geographic region establishes the real needs of this population and guides health professionals in defining preventive actions and appropriate treatment.Objective: To analyze the histopathological diagnosis of maxillofacial lesions issued in the period 1996-2011 managed by the Laboratory of Oral Pathology, Department of Dentistry, Federal University of Sergipe, Brazil.Material and method: A retrospective study of biopsies removed from 1996-2011 was conducted, recovering data related to gender and age of the patients, location of the lesions and histopathological diagnosis. The lesions were grouped into eight diagnostic categories: benign neoplasms, potentially malignant lesions, malignant neoplasms, inflammatory lesions, odontogenic lesions, bone lesions, salivary gland lesions and malformations and developmental anomalies.Result: 762 reports were analyzed, with a higher prevalence of inflammatory lesions (n = 205, 26.9 %). The most common diagnosis among benign neoplasms was the peripheral giant cell granuloma (n=15), among potentially malignant lesions was the epithelial dysplasia (n=80), and in the malignant neoplasm group the most common lesion was the squamous cells carcinoma. (n=29). Analyzing the group of inflammatory lesions, we observed that the prevalent lesion was inflammatory fibrous hyperplasia (n=74). Periapical granuloma was the lesion that appeared most commonly among odontogenic lesions. The prevalent lesion among bone lesions was central ossifying fibroma (n=08), among salivary gland lesions was mucous retention (n=64), in the group of developmental anomalies the prevalent lesion was melanocytic macule (n=04).Conclusion: The findings of this survey highlight the importance in developing treatment plans and educational measures to prevent and reduce patients' exposure to risk factors.
DOI: 10.6084/m9.figshare.11997498
title: Local Circulation Features in the Eastern Amazon: High-resolution Simulation

description: ABSTRACT: A high-resolution simulation of a real case is carried out in Eastern Amazon (Northeastern coast of State of Pará) with the Weather Research and Forecasting (WRF) model in order to analyze/detect local circulation features in the region. To this end, we simulated a case with low interference of synoptic weather systems and precipitation aiming to eliminate the effects of convective systems in local circulations. The performance of the model for the day studied was evaluated and the existence of circulations found in the simulation was confirmed through observational data. The model performance evaluation showed that the model was able to capture most of the patterns for the studied area. The simulation captured the presence of three main circulations: the Sea Breeze (SB), on the coast; the Land Breeze (LB), also on the coast; and the Bay Breeze (BB), which forms on both banks of Marajó Bay. In addition to these three major circulations, the high-resolution simulations also revealed the presence of a river breeze (RB) from Guamá River and a fan-shaped circulation on the entrance of Guajará Bay. The observational data confirmed the presence of Guamá River breeze from the Southeast, which is more active from July to September.
DOI: 10.6084/m9.figshare.12094770.v1
title: Developing a Mathematical Modelling Code for Keeping the Power of Multi Turbocharged Engines at Flight Altitudes

description: ABSTRACT: In this paper, a code is developed in C++ programming language aiming to select and introduce a well-chosen propulsion system for appropriate operation in an aircraft. By using a suitable turbocharged engine, the inlet pressure of the engine manifold will increase to a level equal to the pressure at sea level. Therefore, the aircraft engine will not notice the drop of pressure caused by the increase in altitude. Consequently, the engine power will not be reduced. On the other hand, at high altitude, using only one turbocharger is not adequate to supply engine inlet pressure and flow rate equivalent to sea level conditions, requiring the use of more turbochargers. The code developed in this study will be able to introduce the appropriate turbocharged engine based on the flight altitude and the required power engine of an air vehicle. The altitude defined in this code ranges from 5 to 30 kilometers, which leads to a selection of one to three turbochargers plus a number of intercoolers, according to user input parameters. The objective function of this optimization problem is defined as a function of turbochargers efficiency. However, this objective function can be modified according to the user requests and requirements.
DOI: 10.6084/m9.figshare.7185437.v1
title: Chromium, iron, gold and manganese in Amapá and northern Pará, Brazil

description: ABSTRACT: Information is presented on the geology and mineral deposits in greenstone belts and mafic-ultramafic complexes in Amapá and northern Pará, with the emphasis in iron, gold, manganese, and chromium. At Santa Maria, the Vila Nova Group presents deposits of iron and gold, the latter in carbonatic metasediments crossed by a north-south shear. The group is intruded by the Bacuri Mafic-Ultramafic Complex, with mineable deposits of chromite and magnetite. The overlaying 21 Grande Formation presents minor gold mineralization. At Serra das Coambas there is a significant show of iron formation, and, at its flank, the 21 Grande Formation presents extensive areas exploited by gold miners for gold. Serra do Ipitinga, in Pará, contains the greatest units of iron formation of the area, accompanied by frequent shows of alluvial and primary gold mineralization. The distribution of manganesiferous metasediments identified by mining companies indicate that they were deposited in an about 90 km long narrow basin oriented to northwest, with Serra do Navio near its center. The exposures of iron formation indicate that they were deposited on a belt greater than 350 km long and 100 km wide, oriented and still open to northeast, covering areas of different ages of metamorphism and tectonical stabilization.
DOI: 10.6084/m9.figshare.11997498.v1
title: Local Circulation Features in the Eastern Amazon: High-resolution Simulation

description: ABSTRACT: A high-resolution simulation of a real case is carried out in Eastern Amazon (Northeastern coast of State of Pará) with the Weather Research and Forecasting (WRF) model in order to analyze/detect local circulation features in the region. To this end, we simulated a case with low interference of synoptic weather systems and precipitation aiming to eliminate the effects of convective systems in local circulations. The performance of the model for the day studied was evaluated and the existence of circulations found in the simulation was confirmed through observational data. The model performance evaluation showed that the model was able to capture most of the patterns for the studied area. The simulation captured the presence of three main circulations: the Sea Breeze (SB), on the coast; the Land Breeze (LB), also on the coast; and the Bay Breeze (BB), which forms on both banks of Marajó Bay. In addition to these three major circulations, the high-resolution simulations also revealed the presence of a river breeze (RB) from Guamá River and a fan-shaped circulation on the entrance of Guajará Bay. The observational data confirmed the presence of Guamá River breeze from the Southeast, which is more active from July to September.