cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.9871499
title: Study of the metallurgical bond between 316 steel substrates and NiCrAlY coating sprayed by HVOF and irradiated with a low power CO2 laser

description: ABSTRACT Coatings are used to promote the thermal protection of metal alloys. In the aeronautical industry, the coatings used to protect the turbine blades are called Thermal Barrier Coatings (TBC). The use of NiCrAlY is an alternative as a bonding layer in coatings for turbine blades and it is possible to increase its useful life. This work aims to study the metallurgical bond between the 316-stainless steel substrate and the NiCrAlY coating which was sprayed through the High-Velocity Oxygen-Fuel (HVOF) and after irradiated by a CO2 laser beam with power of 125 W and speed of 50 mm/s. The samples were characterized by scanning electron microscopy (SEM) and the semi-quantitative analysis energy dispersive spectroscopic (EDX) showed that the chemical composition of the coating and the substrate have maintained its original stoichiometry. The line scan analysis is a technique of the EDX to analyze the diffusion between the main chemical elements of 316 steel and NiCrAlY and X-ray diffraction by identifying the alumina AL2O3 phases on the sample surface and the results showed the metallurgical bond between substrate and coating.
DOI: 10.6084/m9.figshare.9871490
title: Development of a method for simultaneous analysis of caffeine and taurine in energy drinks by micellar electrokinetic chromatography with diode-array detector

description: Abstract The objective of this study was to develop, optimize and validate a fast and reliable method for the simultaneous determination of caffeine and taurine contents by micellar electrokinetic chromatography with diode array detector, using direct and indirect detection concomitantly. Multivariate statistical techniques were used as a central composite design and the simultaneous optimization method of responses of Derringer and Suich were used for optimization. The method was applied in the analysis of 73 samples of energy drinks commercialized in Brazil. The optimized method employed a capillary tube with an extended bulb of 50 µm i.d. x 72 cm total length, an electrolyte containing 16.20 mmol.L-1 of benzoic acid and 39.90 mmol.L-1 of SDS, a pH value of 7.26, + 30 kV voltage, direct detection of caffeine at 274 nm and indirect detection of taurine at 230 nm. Validation parameters have demonstrated the reliability and applicability of this method. It was found that more than 50% of the samples were out of the legal limits determined by the Brazilian government regarding the taurine content and 68 % contained caffeine below the value declared on the label. Therefore, the need for greater control concerning the composition of these drinks exists.
DOI: 10.6084/m9.figshare.9871496
title: The relationship between plant density and survival to water stress in seedlings of a legume tree

description: ABSTRACT Competition for soil water is one of the major processes that drive the assembly of plant communities, particularly in regions subjected to long dry seasons. The relationship between plant density and soil water competition has strong, but poorly understood, practical implications for population dynamics, restoration and conservation. We planted seedlings of the pioneer legume tree Senegalia polyphylla in containers and assessed the effects of plant density on their resistance to water stress. We completely eliminated the above-ground parts (stem and shoots) of randomly selected plants at 60-days post-planting in order to create three different densities of seedlings. We saturated the soil of the remaining seedlings and then deprived them of additional water until all seedlings died. We assessed the time elapsed from water suppression to wilting and death of individual plants. We found a strong negative relationship between plant density and time to wilting or death. Seedlings survived water stress 80% longer when density was reduced by two-thirds. Planting in lower densities or reducing density by thinning should be considered as strategies to enhance resistance to water stress in drought-prone regions.
DOI: 10.6084/m9.figshare.9871502.v1
title: Lime Addition Effect on Corrosion of Reinforced Mortar

description: ABSTRACT This study aims to investigate the effect of lime addition in cement mortar on corrosion resistance of carbon and galvanized steel reinforcements. Mixed mortars were studied containing three contents of lime (6.7, 13.3, and 26.3 wt.%). The water retention, incorporated air, and compression strength of reinforced mortars were determined. Immersion tests were performed using the reinforced mortars consisting of 12 cycles of immersion in a solution of 3.5% (wt./v) sodium chloride and drying in a stove at 60oC. Electrochemical impedance spectroscopy was used to monitoring reinforcement corrosion after cyclic tests. These measurements were repeated after 36 months of the cyclic immersion testing. After the cyclic immersion tests in a saline solution, the polarization resistance of carbon and galvanized steel reinforcement increased as the lime content in mortar increased, demonstrating the protective effect of lime. After 36 months, the polarization resistance of steels in mixed mortars with the highest lime content was the lowest. For the carbon and galvanized steel in cement and mixed mortars, the polarization resistance increased after 36 months of the cyclic test.
DOI: 10.6084/m9.figshare.9871490.v1
title: Development of a method for simultaneous analysis of caffeine and taurine in energy drinks by micellar electrokinetic chromatography with diode-array detector

description: Abstract The objective of this study was to develop, optimize and validate a fast and reliable method for the simultaneous determination of caffeine and taurine contents by micellar electrokinetic chromatography with diode array detector, using direct and indirect detection concomitantly. Multivariate statistical techniques were used as a central composite design and the simultaneous optimization method of responses of Derringer and Suich were used for optimization. The method was applied in the analysis of 73 samples of energy drinks commercialized in Brazil. The optimized method employed a capillary tube with an extended bulb of 50 µm i.d. x 72 cm total length, an electrolyte containing 16.20 mmol.L-1 of benzoic acid and 39.90 mmol.L-1 of SDS, a pH value of 7.26, + 30 kV voltage, direct detection of caffeine at 274 nm and indirect detection of taurine at 230 nm. Validation parameters have demonstrated the reliability and applicability of this method. It was found that more than 50% of the samples were out of the legal limits determined by the Brazilian government regarding the taurine content and 68 % contained caffeine below the value declared on the label. Therefore, the need for greater control concerning the composition of these drinks exists.
DOI: 10.6084/m9.figshare.9871496.v1
title: The relationship between plant density and survival to water stress in seedlings of a legume tree

description: ABSTRACT Competition for soil water is one of the major processes that drive the assembly of plant communities, particularly in regions subjected to long dry seasons. The relationship between plant density and soil water competition has strong, but poorly understood, practical implications for population dynamics, restoration and conservation. We planted seedlings of the pioneer legume tree Senegalia polyphylla in containers and assessed the effects of plant density on their resistance to water stress. We completely eliminated the above-ground parts (stem and shoots) of randomly selected plants at 60-days post-planting in order to create three different densities of seedlings. We saturated the soil of the remaining seedlings and then deprived them of additional water until all seedlings died. We assessed the time elapsed from water suppression to wilting and death of individual plants. We found a strong negative relationship between plant density and time to wilting or death. Seedlings survived water stress 80% longer when density was reduced by two-thirds. Planting in lower densities or reducing density by thinning should be considered as strategies to enhance resistance to water stress in drought-prone regions.
DOI: 10.6084/m9.figshare.9871499.v1
title: Study of the metallurgical bond between 316 steel substrates and NiCrAlY coating sprayed by HVOF and irradiated with a low power CO2 laser

description: ABSTRACT Coatings are used to promote the thermal protection of metal alloys. In the aeronautical industry, the coatings used to protect the turbine blades are called Thermal Barrier Coatings (TBC). The use of NiCrAlY is an alternative as a bonding layer in coatings for turbine blades and it is possible to increase its useful life. This work aims to study the metallurgical bond between the 316-stainless steel substrate and the NiCrAlY coating which was sprayed through the High-Velocity Oxygen-Fuel (HVOF) and after irradiated by a CO2 laser beam with power of 125 W and speed of 50 mm/s. The samples were characterized by scanning electron microscopy (SEM) and the semi-quantitative analysis energy dispersive spectroscopic (EDX) showed that the chemical composition of the coating and the substrate have maintained its original stoichiometry. The line scan analysis is a technique of the EDX to analyze the diffusion between the main chemical elements of 316 steel and NiCrAlY and X-ray diffraction by identifying the alumina AL2O3 phases on the sample surface and the results showed the metallurgical bond between substrate and coating.
DOI: 10.6084/m9.figshare.9871472
title: Management of nursing care in HIV/AIDS from a palliative and hospital perspective

description: ABSTRACT Objectives: To understand the meaning attributed by the nurse to the management of nursing care to the person hospitalized due to clinical complications caused by AIDS; to analyze actions related to palliative care; and to construct a theoretical matrix regarding the management of nursing care. Method: Qualitative, exploratory research, guided by the Grounded Theory. Seven nurses and ten nursing technicians were interviewed between May and September 2015, in a university hospital, located in Rio de Janeiro State, Brazil. Results: Five categories that covered the profile of the hospitalized person, palliative care, intervening conditions for care management, the need for professional qualification, and other aspects to better organize and manage care, including conflict management arose. Final considerations: The theoretical matrix values the quality of life, the need to understand the flow of care to avoid readmissions and not adherence to medications, requiring new research in the area, such as implementation.
DOI: 10.6084/m9.figshare.9871478
title: Interprofessional education and the formative actions of the emergency provision axis of the More Doctors Program

description: ABSTRACT This article aimed to identify if the formative actions of the axis the emergency provision of the More Doctors Program are based on theoretical and methodological elements of interprofessional education from the perspective of the participants of the program. It is an exploratory study, developed in 2016, in Brazil. Data were collected through individual interviews (n=30) and nine focus groups (n=52), and treated by content analysis, which produced three categories: Assumptions of interprofessional education set forth in the formative cycles of the More Doctors; Changes in the process of teamwork, from the perspective of the elements of interprofessional education, triggered by the formative cycles; Difficulties for the approach of interprofessional education in the formative cycles. Among the elements enunciated in the formative processes are the learning about the role of each profession, the sharing of experiences, and the centrality of care in the patient. However, the fundamental precept of interprofessional education of learning between two or more professions is not applied. The More Doctors constitutes a propitious policy for the strengthening of interprofessionality, because its proposal is based on the logic of permanent education, which demands the establishment of a relationship of mutual influence between education and work in health.
DOI: 10.6084/m9.figshare.9871481
title: Application of CAMQL technique on external cylindrical grinding of AISI 4340 steel with CBN grinding wheel

description: ABSTRACT The grinding process provides us with good surface finish and good dimensional and geometric precision. Also, ground pieces have a high added value due to this process being a finishing one and is commonly carried out in the last stages of manufacture. A limiting factor for grinding is the great amount of heat generated, which is better removed from the cutting zone by the application of cutting fluids. The fluid used, in most of cases, are pollutants and contain substances that are harmful both to workers and environment, besides having a high cost of purchase, maintenance and disposal. In order to reduce the amount of fluid used during grinding, the present work was developed. Its main objective is to improve the technique of minimum quantity of lubrication (MQL) by combining it with the application of compressed cold air. This aims to increase the cooling effect and yet minimize the heat concentration in the cutting zone. To evaluate the effectiveness of the technique, the parameters of roughness, circularity, grinding wheel wear and power consumption during machining were analyzed. These values were measured for three different methods of application of cutting fluids during grinding to compare. The conventional flood application obtained the best results for the parameters analyzed while CAMQL (cold air minimum quantity lubrication) presents intermediate results and MQL (minimum quantity lubrication) the worst results obtained in all analyzed parameters. The proposed technique of reducing the amount of fluid used has generally been positive, proving its feasibility for the grinding of AISI 4340 steel using CBN grinding wheel with CBN being Cubic Boron Nitride, a superabrasive material.
DOI: 10.6084/m9.figshare.9871478.v1
title: Interprofessional education and the formative actions of the emergency provision axis of the More Doctors Program

description: ABSTRACT This article aimed to identify if the formative actions of the axis the emergency provision of the More Doctors Program are based on theoretical and methodological elements of interprofessional education from the perspective of the participants of the program. It is an exploratory study, developed in 2016, in Brazil. Data were collected through individual interviews (n=30) and nine focus groups (n=52), and treated by content analysis, which produced three categories: Assumptions of interprofessional education set forth in the formative cycles of the More Doctors; Changes in the process of teamwork, from the perspective of the elements of interprofessional education, triggered by the formative cycles; Difficulties for the approach of interprofessional education in the formative cycles. Among the elements enunciated in the formative processes are the learning about the role of each profession, the sharing of experiences, and the centrality of care in the patient. However, the fundamental precept of interprofessional education of learning between two or more professions is not applied. The More Doctors constitutes a propitious policy for the strengthening of interprofessionality, because its proposal is based on the logic of permanent education, which demands the establishment of a relationship of mutual influence between education and work in health.
DOI: 10.6084/m9.figshare.9871472.v1
title: Management of nursing care in HIV/AIDS from a palliative and hospital perspective

description: ABSTRACT Objectives: To understand the meaning attributed by the nurse to the management of nursing care to the person hospitalized due to clinical complications caused by AIDS; to analyze actions related to palliative care; and to construct a theoretical matrix regarding the management of nursing care. Method: Qualitative, exploratory research, guided by the Grounded Theory. Seven nurses and ten nursing technicians were interviewed between May and September 2015, in a university hospital, located in Rio de Janeiro State, Brazil. Results: Five categories that covered the profile of the hospitalized person, palliative care, intervening conditions for care management, the need for professional qualification, and other aspects to better organize and manage care, including conflict management arose. Final considerations: The theoretical matrix values the quality of life, the need to understand the flow of care to avoid readmissions and not adherence to medications, requiring new research in the area, such as implementation.
DOI: 10.6084/m9.figshare.9871481.v1
title: Application of CAMQL technique on external cylindrical grinding of AISI 4340 steel with CBN grinding wheel

description: ABSTRACT The grinding process provides us with good surface finish and good dimensional and geometric precision. Also, ground pieces have a high added value due to this process being a finishing one and is commonly carried out in the last stages of manufacture. A limiting factor for grinding is the great amount of heat generated, which is better removed from the cutting zone by the application of cutting fluids. The fluid used, in most of cases, are pollutants and contain substances that are harmful both to workers and environment, besides having a high cost of purchase, maintenance and disposal. In order to reduce the amount of fluid used during grinding, the present work was developed. Its main objective is to improve the technique of minimum quantity of lubrication (MQL) by combining it with the application of compressed cold air. This aims to increase the cooling effect and yet minimize the heat concentration in the cutting zone. To evaluate the effectiveness of the technique, the parameters of roughness, circularity, grinding wheel wear and power consumption during machining were analyzed. These values were measured for three different methods of application of cutting fluids during grinding to compare. The conventional flood application obtained the best results for the parameters analyzed while CAMQL (cold air minimum quantity lubrication) presents intermediate results and MQL (minimum quantity lubrication) the worst results obtained in all analyzed parameters. The proposed technique of reducing the amount of fluid used has generally been positive, proving its feasibility for the grinding of AISI 4340 steel using CBN grinding wheel with CBN being Cubic Boron Nitride, a superabrasive material.
DOI: 10.6084/m9.figshare.9871463
title: Instant messaging application for the care of people living with HIV/aids

description: ABSTRACT Objective: To assess a specific instant messaging application as a tool of care for people living with HIV/aids, based on analysis of the interactions between nurse and patients. Method: Descriptive, quantitative study with 102 patients from two outpatient infectious disease clinics of Fortaleza, Ceará. During four months, participants received a message every 15 days, totaling eight messages, regarding: adherence to antiretroviral therapy; physical activity; social support; self-esteem; anxiety/depression; eating habits; alcohol and drugs; and sexuality. Results: There were 816 interactions, especially for dialogs about performing physical activity (27.87%), sharing of signs and symptoms (18.03%), report of engagement with treatment (9.84%) and requests of information on the intake of medicine (9.84%). Most participants showed satisfaction with the follow-up, with willingness to continue receiving messages (90.58%). Conclusion: The use of this application is a viable strategy to improve care for people with HIV by promoting instant communication.
DOI: 10.6084/m9.figshare.9871466
title: Directly observed treatment for tuberculosis in the State of São Paulo

description: ABSTRACT Objectives: To describe and analyze the coverage profile of directly observed treatment for tuberculosis in 59 priority municipalities in the state of São Paulo, Brazil, through the creation and comparison of groups homogenized by the number of people in each municipality from 2006 to 2012. Method: Quantitative, epidemiological and descriptive study based on the data available in the EPI-TB and the Statistica 7.0 software databases. Results: The mean and standard deviation of directly observed treatment for the 59 priority municipalities of the state of São Paulo were 77.0 ± 24.3%. The coverage of directly observed treatment increased in 34 municipalities (57.6%) but decreased in 25 (42.4%). Conclusion: Some municipalities could not keep the coverage reached at some point. This coverage heterogeneity should be examined in detail by searching for possible reasons in political-management, technical-operational and funding dimensions.
DOI: 10.6084/m9.figshare.9871463.v1
title: Instant messaging application for the care of people living with HIV/aids

description: ABSTRACT Objective: To assess a specific instant messaging application as a tool of care for people living with HIV/aids, based on analysis of the interactions between nurse and patients. Method: Descriptive, quantitative study with 102 patients from two outpatient infectious disease clinics of Fortaleza, Ceará. During four months, participants received a message every 15 days, totaling eight messages, regarding: adherence to antiretroviral therapy; physical activity; social support; self-esteem; anxiety/depression; eating habits; alcohol and drugs; and sexuality. Results: There were 816 interactions, especially for dialogs about performing physical activity (27.87%), sharing of signs and symptoms (18.03%), report of engagement with treatment (9.84%) and requests of information on the intake of medicine (9.84%). Most participants showed satisfaction with the follow-up, with willingness to continue receiving messages (90.58%). Conclusion: The use of this application is a viable strategy to improve care for people with HIV by promoting instant communication.
DOI: 10.6084/m9.figshare.9871466.v1
title: Directly observed treatment for tuberculosis in the State of São Paulo

description: ABSTRACT Objectives: To describe and analyze the coverage profile of directly observed treatment for tuberculosis in 59 priority municipalities in the state of São Paulo, Brazil, through the creation and comparison of groups homogenized by the number of people in each municipality from 2006 to 2012. Method: Quantitative, epidemiological and descriptive study based on the data available in the EPI-TB and the Statistica 7.0 software databases. Results: The mean and standard deviation of directly observed treatment for the 59 priority municipalities of the state of São Paulo were 77.0 ± 24.3%. The coverage of directly observed treatment increased in 34 municipalities (57.6%) but decreased in 25 (42.4%). Conclusion: Some municipalities could not keep the coverage reached at some point. This coverage heterogeneity should be examined in detail by searching for possible reasons in political-management, technical-operational and funding dimensions.