cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.9870740
title: Vascular flora of Lençóis Maranhenses National Park, Maranhão State, Brazil: checklist, floristic affinities and phytophysiognomies of restingas in the municipality of Barreirinhas

description: ABSTRACT This study presents a floristic survey of the vascular plants of restingas of Lençóis Maranheses National Park, in the municipality of Barreirinhas, Maranhão, Brazil, including descriptions of the principal phytophysiognomies and similarity analyses including other restinga areas in North and Northeastern Brazil. Samples from the study area deposited in the herbaria MG, IAN and MAR were inventoried and fieldwork for the collection of additional botanical samples was undertaken between September 2015 and August 2017. Unweighted pair group method with arithmetic mean (UPGMA) using Jaccard index was used to calculate the similarity among floras of the restingas of the states of Pará, Piauí, Ceará and Maranhão. A total of 289 species in 189 genera and 73 families was recorded, including 56 new occurence records for the state of Maranhão. The richest families were Poaceae, Cyperaceae, Fabaceae, Rubiaceae, Eriocaulaceae and Myrtaceae. Similarity indexes revealed low similarity among the selected areas, suggesting high floristic identity for each area, as well as possible collection bias among the areas.
DOI: 10.6084/m9.figshare.9870743
title: Knowledge of nursing student on the prevention of sexually transmitted infections

description: ABSTRACT Objective: To identify the knowledge and self-care actions taken by nursing undergraduate students of a Federal University of the South of Brazil, against Sexually Transmitted Infections. Method: Exploratory qualitative study, conducted 40 interviews with undergraduate students at the beginning and end of the course. The analysis was thematic, resulting in three categories. Results: Knowledge about the subject is a decisive factor for self-care, and the more knowledge, the greater the prevention. The dissemination of knowledge of students at the end of the course not only influences self-care but also health promotion in the social sphere. Final considerations: Knowledge is important in self-care and caring for others. The dissemination of knowledge becomes evident according to the complexity of the course. Stable relationships may interfere with the use or disuse of condoms in sexual relationships, a misnomer present in today’s society.
DOI: 10.6084/m9.figshare.9870740.v1
title: Vascular flora of Lençóis Maranhenses National Park, Maranhão State, Brazil: checklist, floristic affinities and phytophysiognomies of restingas in the municipality of Barreirinhas

description: ABSTRACT This study presents a floristic survey of the vascular plants of restingas of Lençóis Maranheses National Park, in the municipality of Barreirinhas, Maranhão, Brazil, including descriptions of the principal phytophysiognomies and similarity analyses including other restinga areas in North and Northeastern Brazil. Samples from the study area deposited in the herbaria MG, IAN and MAR were inventoried and fieldwork for the collection of additional botanical samples was undertaken between September 2015 and August 2017. Unweighted pair group method with arithmetic mean (UPGMA) using Jaccard index was used to calculate the similarity among floras of the restingas of the states of Pará, Piauí, Ceará and Maranhão. A total of 289 species in 189 genera and 73 families was recorded, including 56 new occurence records for the state of Maranhão. The richest families were Poaceae, Cyperaceae, Fabaceae, Rubiaceae, Eriocaulaceae and Myrtaceae. Similarity indexes revealed low similarity among the selected areas, suggesting high floristic identity for each area, as well as possible collection bias among the areas.
DOI: 10.6084/m9.figshare.9870734
title: Assessment of susceptibility to corrosion of AISI 316L stainless steel sub- mitted to thermal simulation with the use of Gleeble

description: ABSTRACT The purpose of this work was to evaluate the influence of the average grain size on the corrosion susceptibility of AISI 316L austenitic stainless steel, which is widely used in welded joints, at room temperature and at very low temperatures (cryogenic conditions) because it has excellent corrosion resistance and good ductility. For this, samples were thermally simulated on a Gleeble 3800 at temperatures of 900°C and 1200°C under the residence time of 0, 5, 20 and 100 seconds, controlling the cooling rate to around 20°C/s followed by metallography and corrosion analysis using linear polarization electrochemical techniques using a solution of 3,5% sodium chloride (NaCl). In addition, tests were performed by x-ray analysis on samples of greater and lesser susceptibility to corrosion for microstructural verification. The results showed that the samples submitted to 1200ºC presented a bigger increase in the average grain size in relation to the samples of 900ºC, having a lower susceptibility to corrosion, except for the condition of 1200ºC to 100s. However in the samples with 1200ºC to 100s, carbides were detected by X-ray analysis and finally, the corrosion phenomena were observed by pitting in all samples.
DOI: 10.6084/m9.figshare.9870743.v1
title: Knowledge of nursing student on the prevention of sexually transmitted infections

description: ABSTRACT Objective: To identify the knowledge and self-care actions taken by nursing undergraduate students of a Federal University of the South of Brazil, against Sexually Transmitted Infections. Method: Exploratory qualitative study, conducted 40 interviews with undergraduate students at the beginning and end of the course. The analysis was thematic, resulting in three categories. Results: Knowledge about the subject is a decisive factor for self-care, and the more knowledge, the greater the prevention. The dissemination of knowledge of students at the end of the course not only influences self-care but also health promotion in the social sphere. Final considerations: Knowledge is important in self-care and caring for others. The dissemination of knowledge becomes evident according to the complexity of the course. Stable relationships may interfere with the use or disuse of condoms in sexual relationships, a misnomer present in today’s society.
DOI: 10.6084/m9.figshare.9870725
title: Validation of Brazilian educational technology for disseminating knowledge on leprosy to adolescents

description: ABSTRACT Objective: Elaborate and validate an educational technology for adolescents on leprosy, focusing on preventing the disease and reducing stigma. Method: First, a prototype of the educational technology was elaborated and later analyzed by 17 adolescents and 7 researchers’ experts in the leprosy area and educational technologies who answered a questionnaire with questions related to the subject. Subsequently, the technology has been applied to 43 adolescents, and a questionnaire was handed before and after the use of the game, so that questionnaire scores were compared by a Wilcoxon paired test. Results: After the data collection with researchers and adolescents, the answers received descriptive treatment, and the Content Validity Index was calculated, which reached a good level of agreement, with an overall value (0.86), although there were improvements to the technology, based on the perceptions of researchers and adolescents. Conclusions: There was an increase in knowledge about leprosy.
DOI: 10.6084/m9.figshare.9870728
title: Assessing the Impact of Prophylactic Vaccines on HPV Prevalence

description: ABSTRACT A mathematical model considering female and male individuals is proposed to evaluate vaccination strategies applied to control of HPV transmission in human population. The basic reproductive number of the disease, R 0 is given by the geometric mean of the basic reproductive number of female and male populations. The model has a globally asymptotically stable disease-free equilibrium whenever R 0 &lt; 1. Furthermore, it has an unique endemic state when R 0 exceeds unity which is globally asymptotically stable. Numerical simulations were done to compare several different vaccination schedules. The results showed that the vaccination strategies that do not include vaccination of men can only control the disease if more than 90% of women are vaccinated. The sensitivity analysis indicated that the relevant parameters to control HPV transmission, in order of importance, are vaccine efficacy times the fraction of population that is vaccinated, disease recovery-rate, and disease transmission rate. Therefore, health politics that promoting the increase of vaccine coverage, and screening for the disease in both population can improve disease control.
DOI: 10.6084/m9.figshare.9870731
title: Classification of clinical risk in people with AIDS followed up in specialized care

description: ABSTRACT Aim: To develop a clinical risk stratification score for people living with AIDS and to analyze its association with clinical and sociodemographic aspects. Method: Cross-sectional study involving 150 adults with AIDS, in outpatient follow-up. A structured instrument was applied and, sequentially, inferential statistical techniques on the developed score. Results: 45.3% of the participants were classified as in high clinical risk. TL-CD4+ &lt;500cel/mm3 count, detectable viral load, presence of opportunistic diseases, chronic diseases and clinical manifestations were associated with high clinical risk. There was a significant difference in the mean risk between the categories of variables employment status (p = 0.003) and economic class (p = 0.035). There was a higher risk for brown people (OR = 5.55), unemployed status (OR = 16,51) and belonging to classes C (OR = 20.07) and D (OR = 53,32), and a lower risk for individuals with higher schooling (OR = 0.02). Conclusion: The proposed score quantifies clinical situations and points out sociodemographic aspects that predispose to instability and aggravation of AIDS, supporting the qualification of care.
DOI: 10.6084/m9.figshare.9870734.v1
title: Assessment of susceptibility to corrosion of AISI 316L stainless steel sub- mitted to thermal simulation with the use of Gleeble

description: ABSTRACT The purpose of this work was to evaluate the influence of the average grain size on the corrosion susceptibility of AISI 316L austenitic stainless steel, which is widely used in welded joints, at room temperature and at very low temperatures (cryogenic conditions) because it has excellent corrosion resistance and good ductility. For this, samples were thermally simulated on a Gleeble 3800 at temperatures of 900°C and 1200°C under the residence time of 0, 5, 20 and 100 seconds, controlling the cooling rate to around 20°C/s followed by metallography and corrosion analysis using linear polarization electrochemical techniques using a solution of 3,5% sodium chloride (NaCl). In addition, tests were performed by x-ray analysis on samples of greater and lesser susceptibility to corrosion for microstructural verification. The results showed that the samples submitted to 1200ºC presented a bigger increase in the average grain size in relation to the samples of 900ºC, having a lower susceptibility to corrosion, except for the condition of 1200ºC to 100s. However in the samples with 1200ºC to 100s, carbides were detected by X-ray analysis and finally, the corrosion phenomena were observed by pitting in all samples.
DOI: 10.6084/m9.figshare.9870728.v1
title: Assessing the Impact of Prophylactic Vaccines on HPV Prevalence

description: ABSTRACT A mathematical model considering female and male individuals is proposed to evaluate vaccination strategies applied to control of HPV transmission in human population. The basic reproductive number of the disease, R 0 is given by the geometric mean of the basic reproductive number of female and male populations. The model has a globally asymptotically stable disease-free equilibrium whenever R 0 &lt; 1. Furthermore, it has an unique endemic state when R 0 exceeds unity which is globally asymptotically stable. Numerical simulations were done to compare several different vaccination schedules. The results showed that the vaccination strategies that do not include vaccination of men can only control the disease if more than 90% of women are vaccinated. The sensitivity analysis indicated that the relevant parameters to control HPV transmission, in order of importance, are vaccine efficacy times the fraction of population that is vaccinated, disease recovery-rate, and disease transmission rate. Therefore, health politics that promoting the increase of vaccine coverage, and screening for the disease in both population can improve disease control.
DOI: 10.6084/m9.figshare.9870719
title: Catalytic Removal of Toluene from Air Streams by Cobalt Oxide Supported on Sepiolite

description: Removal of toluene using cobalt oxide supported on sepiolite catalysts was investigated. Deposition precipitation method was used to prepare the catalysts. The catalysts were characterized using X-ray diffraction, field emission scanning electron microscopy, energy dispersive X-ray spectroscopy, thermogravimetric analysis (TGA) and Brunauer-Emmet-Teller methods. The results of catalytic testing showed that 20% cobalt oxide/sepiolite (Co20/Sep) had higher catalytic activity for degradation of toluene. A temperature of 400 ºC was found to be the optimum calcination temperature for Co20/Sep, since it achieved 90% toluene conversion at about 300 ºC. The results showed that the selectivity of the catalysts towards CO2 was complete and no byproducts were detected. Stability tests also indicated that Co20/Sep remains stable at 320 ºC with complete conversion of toluene after 24 h. In conclusion, the results of this study confirmed sepiolite-supported cobalt oxide catalyst as an efficient catalyst for degradation of toluene.
DOI: 10.6084/m9.figshare.9870725.v1
title: Validation of Brazilian educational technology for disseminating knowledge on leprosy to adolescents

description: ABSTRACT Objective: Elaborate and validate an educational technology for adolescents on leprosy, focusing on preventing the disease and reducing stigma. Method: First, a prototype of the educational technology was elaborated and later analyzed by 17 adolescents and 7 researchers’ experts in the leprosy area and educational technologies who answered a questionnaire with questions related to the subject. Subsequently, the technology has been applied to 43 adolescents, and a questionnaire was handed before and after the use of the game, so that questionnaire scores were compared by a Wilcoxon paired test. Results: After the data collection with researchers and adolescents, the answers received descriptive treatment, and the Content Validity Index was calculated, which reached a good level of agreement, with an overall value (0.86), although there were improvements to the technology, based on the perceptions of researchers and adolescents. Conclusions: There was an increase in knowledge about leprosy.
DOI: 10.6084/m9.figshare.9870731.v1
title: Classification of clinical risk in people with AIDS followed up in specialized care

description: ABSTRACT Aim: To develop a clinical risk stratification score for people living with AIDS and to analyze its association with clinical and sociodemographic aspects. Method: Cross-sectional study involving 150 adults with AIDS, in outpatient follow-up. A structured instrument was applied and, sequentially, inferential statistical techniques on the developed score. Results: 45.3% of the participants were classified as in high clinical risk. TL-CD4+ &lt;500cel/mm3 count, detectable viral load, presence of opportunistic diseases, chronic diseases and clinical manifestations were associated with high clinical risk. There was a significant difference in the mean risk between the categories of variables employment status (p = 0.003) and economic class (p = 0.035). There was a higher risk for brown people (OR = 5.55), unemployed status (OR = 16,51) and belonging to classes C (OR = 20.07) and D (OR = 53,32), and a lower risk for individuals with higher schooling (OR = 0.02). Conclusion: The proposed score quantifies clinical situations and points out sociodemographic aspects that predispose to instability and aggravation of AIDS, supporting the qualification of care.
DOI: 10.6084/m9.figshare.9870713
title: Restoration of abandoned subtropical highland grasslands in Brazil: mowing produces fast effects, but hay transfer does not

description: ABSTRACT Subtropical Campos Sulinos grasslands, in South Brazil, are among the most biodiverse grasslands of the world. As climatic conditions lead to high productivity, disturbance are critical to maintain their diversity. Long-term exclusion, on the other hand, leads to plant species losses and changes in composition. No studies on the restoration of these grasslands after abandonment exist to date. We tested combinations of restoration techniques with the aim of increasing plant diversity in an abandoned and species-poor grassland in the South Brazilian highland region. In a bi-factorial experiment, we tested the effects of two different frequencies of mowing and of hay transfer. Mowing reduced plant cover, vegetation height, and abundance of erect grasses and shrubs, and increased species richness, diversity (Shannon diversity index) and prostrate forb and grass cover. No differences were found between mowing frequencies. Hay transfer was not effective at reintroducing species. The results of the present study provide further evidence that the reintroduction of plants is a major challenge in the restoration of subtropical and tropical grasslands. The study shows that mowing is a fast way to increase plant diversity in Campos Sulinos after long periods of abandonment.
DOI: 10.6084/m9.figshare.9870716
title: Variation of the milling conditions in the obtaining of nanocellulose from the paper sludge

description: ABSTRACT This work aimed to evaluate three different milling conditions, seeking the optimization of CNS isolation process. The paper sludge was chemically treated with detergent and H2O2, by two steps, to remove the noncellulosic contents (hemicellulose and lignin). After these treatments, the sample was milled with the variation of a liquid medium. The three liquids milling medium were: i) dry medium (CNS-D); ii) moist with water and (CNS-W) iii) moist with ethanol (CNS-E). The CNSs were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), zeta potential and dynamic light scattering (DLS). The milled samples presented different behavior, depending on the medium applied. The CNS-W presented low efficiency due to the formation of agglomerates around the ceramic ball, resulting in larger fiber sizes (microsizes). Although, the samples CNS-D and CNS-E presented similar behavior of sizes distribution, with average size 340 nm and 373 nm, respectively, determined by DLS. The CNS-E sample presented higher yield and electrostatic stability in solution, besides not presenting loss of crystallinity, as occurred with CNS-D, observed by FTIR analysis. Thus, the isolation with ethanol showed more efficient process among the three processes studied. This work achieved the isolation of CNS; besides, it proposed an environmentally friendly isolation method, and this may add value in the paper sludge.
DOI: 10.6084/m9.figshare.9870719.v1
title: Catalytic Removal of Toluene from Air Streams by Cobalt Oxide Supported on Sepiolite

description: Removal of toluene using cobalt oxide supported on sepiolite catalysts was investigated. Deposition precipitation method was used to prepare the catalysts. The catalysts were characterized using X-ray diffraction, field emission scanning electron microscopy, energy dispersive X-ray spectroscopy, thermogravimetric analysis (TGA) and Brunauer-Emmet-Teller methods. The results of catalytic testing showed that 20% cobalt oxide/sepiolite (Co20/Sep) had higher catalytic activity for degradation of toluene. A temperature of 400 ºC was found to be the optimum calcination temperature for Co20/Sep, since it achieved 90% toluene conversion at about 300 ºC. The results showed that the selectivity of the catalysts towards CO2 was complete and no byproducts were detected. Stability tests also indicated that Co20/Sep remains stable at 320 ºC with complete conversion of toluene after 24 h. In conclusion, the results of this study confirmed sepiolite-supported cobalt oxide catalyst as an efficient catalyst for degradation of toluene.
DOI: 10.6084/m9.figshare.9870704
title: Determination of phases and residual stresses after martensitic transformation induced by rolling in 304L stainless steel

description: ABSTRACT The 304L austenitic stainless steel is susceptible to deformation induced martensitic transformation. This phase transformation depends on the temperature as well as on the mode, rate and level of deformation. In this work the phases and residual stresses of a 304L TRIP steel where martensitic transformation was induced by cold rolling were investigated by X-ray diffraction XRD. The analyses were performed for different sample thicknesses. The results showed that the phase composition and the residual stresses are strongly dependent on sample thickness. All samples showed a compressive residual stress.
DOI: 10.6084/m9.figshare.9870716.v1
title: Variation of the milling conditions in the obtaining of nanocellulose from the paper sludge

description: ABSTRACT This work aimed to evaluate three different milling conditions, seeking the optimization of CNS isolation process. The paper sludge was chemically treated with detergent and H2O2, by two steps, to remove the noncellulosic contents (hemicellulose and lignin). After these treatments, the sample was milled with the variation of a liquid medium. The three liquids milling medium were: i) dry medium (CNS-D); ii) moist with water and (CNS-W) iii) moist with ethanol (CNS-E). The CNSs were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), zeta potential and dynamic light scattering (DLS). The milled samples presented different behavior, depending on the medium applied. The CNS-W presented low efficiency due to the formation of agglomerates around the ceramic ball, resulting in larger fiber sizes (microsizes). Although, the samples CNS-D and CNS-E presented similar behavior of sizes distribution, with average size 340 nm and 373 nm, respectively, determined by DLS. The CNS-E sample presented higher yield and electrostatic stability in solution, besides not presenting loss of crystallinity, as occurred with CNS-D, observed by FTIR analysis. Thus, the isolation with ethanol showed more efficient process among the three processes studied. This work achieved the isolation of CNS; besides, it proposed an environmentally friendly isolation method, and this may add value in the paper sludge.
DOI: 10.6084/m9.figshare.9870701
title: A Study of Chemical Composition and Enzymatic Hydrolysis of Solid Organic Waste from Agrosilvopastoral Systems

description: Agrosilvopastoral waste, regarding agriculture and agro-industry sectors, is pointed as a promising sustainable raw material for biofuels production, specially concerning exploitation of lignocellulosic organic residues for fermentable sugars and cellulosic ethanol output, being therefore necessary to investigate the potential of these substrates concerning chemical composition, since many of them were not reported yet in literature. Being so, this paper presents a study of chemical composition and enzymatic hydrolysis of wastes from the four main crops in Maranhão, Brazil (soy, cassava, rice and corn) which are usually underutilized or abandoned in the field. The results of enzymatic hydrolysis were satisfactory for both soy and particularly corn residues, which presented total reducing sugars (TRS) percentage greater than 50% in comparison with pure cellulose.