cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.11609142
title: MODELLING ION TRANSPORT IN AN AMINE SOLUTION THROUGH A NANOFILTRATION MEMBRANE

description: Abstract The performance of a flat sheet polyamide nanofiltration membrane in rejection of a binary mixture of heat stable salts (acetate and sulfate) from methyl-diethanolamine (MDEA) solution was investigated. The effects of pressure and concentration of MDEA solution on rejection of acetate and sulfate ions were studied. At MDEA concentration of 20% wt. and pressure of 70 bar, 80% and 98% rejection can be obtained for acetate and sulfate ions, respectively. Membrane performance and transport coefficients were investigated using the Spiegler-Kedem-Katchalsky (SKK) model, film theory and extended Nernst-Planck (FT-ENP) model. The results of the FT-ENP model show accurate agreement with experimental results. This result can be obtained due to considering the charge repulsion of sulfate ions. For sulfate ions, both models show errors less than 1% with &gt;R2=0.98. In the case of acetate, errors less than 3% (&gt;R2=0.75) and 2% (&gt;R2=0.89) were obtained for the SKK and FT-ENP models, respectively.
DOI: 10.6084/m9.figshare.11609139.v1
title: Bioterrorism: empower to respond

description: ABSTRACT The use of biological agents for the purpose of terrorizing enemies dates back many centuries. This terror action with the use of biological agents became popularized as Bioterrorism. Bioterrorist attacks are dangerous due to various factors involved, such as the silent way in which it may occur, or the type of biological agent that can be used depending on the purpose of the attack. To prevent contamination by these agents, the professionals who will act to combat these events should have knowledge about the varieties of mechanisms of actions and dissemination of the pathogens, as well the best way to neutralize and eliminate them; besides, they should have known how to choose appropriates protection equipment, both for individual and collective protection. Thus, it is necessary that such action teams be well empowered and trained. The purpose of this paper is to analyze, in the existing literature, what are the training modes in the world for first responders to attacks involving Chemical, Biological, Radiological or Nuclear (CBRN) agents. Thus, an integrative review was made based on 3 articles found in a period of 20 years. It is concluded that studies in this field are minimals and that more research and training for this kind of event should be carried out worldwide.
DOI: 10.6084/m9.figshare.11609142.v1
title: MODELLING ION TRANSPORT IN AN AMINE SOLUTION THROUGH A NANOFILTRATION MEMBRANE

description: Abstract The performance of a flat sheet polyamide nanofiltration membrane in rejection of a binary mixture of heat stable salts (acetate and sulfate) from methyl-diethanolamine (MDEA) solution was investigated. The effects of pressure and concentration of MDEA solution on rejection of acetate and sulfate ions were studied. At MDEA concentration of 20% wt. and pressure of 70 bar, 80% and 98% rejection can be obtained for acetate and sulfate ions, respectively. Membrane performance and transport coefficients were investigated using the Spiegler-Kedem-Katchalsky (SKK) model, film theory and extended Nernst-Planck (FT-ENP) model. The results of the FT-ENP model show accurate agreement with experimental results. This result can be obtained due to considering the charge repulsion of sulfate ions. For sulfate ions, both models show errors less than 1% with &gt;R2=0.98. In the case of acetate, errors less than 3% (&gt;R2=0.75) and 2% (&gt;R2=0.89) were obtained for the SKK and FT-ENP models, respectively.
DOI: 10.6084/m9.figshare.11609124
title: Prevalence and trends of mental disorders requiring inpatient care in the city of Porto Alegre: a citywide study including all inpatient admissions due to mental disorders in the public system from 2013-2017

description: Abstract Objectives To investigate the 5-year prevalence of patients admitted to public inpatient care units due to a mental disorder, stratifying them by age group and diagnosis, and to assess trends of admissions over this time period in Porto Alegre. Methods All admissions to the public mental health care system regulated by the city-owned electronic system Administração Geral dos Hospitais (AGHOS) were included in the analysis. The total population size was obtained by estimations of Fundação de Economia e Estatística (FEE). General information about 5-year prevalence of inpatient admissions, time-series trends e prevalence by age groups and diagnosis were presented. Results There were 32,608 admissions over the 5-year period analyzed. The overall prevalence of patients was 1.62% among the total population, 0.01% among children, 1.12% among adolescents, 2.28% among adults and 0.93% among the elderly. The most common diagnosis was drug-related, followed by mood, alcohol-related and psychotic disorders. There was a linear trend showing an increase in the number of admissions from 2013 to the midst of 2014, which dropped in 2015. Conclusions Admissions due to mental disorders are relatively common, mainly among adults and related to drug use and mood disorders. Time trends varied slightly over the 5 years. Prevalence rates in real-world settings might be useful for policymakers interested in planning the public mental health system in large Brazilian cities.
DOI: 10.6084/m9.figshare.11609130
title: Brazilian Portuguese version of financial risk-taking and tolerance scales: validity evidence within and between measures

description: Abstract Objectives To construct and validate a psychological measure called the Financial Risk-Taking Scale (FRTakS) and to translate, adapt, and validate a psychological measure called the Financial Risk Tolerance Scale (FRTolS) with a Brazilian sample. Exploratory and confirmatory factor analyses were used to assess evidence of the validity of the scales’ internal structures. We also tested the convergent validity between FRTakS and FRTolS. Method After construction (FRTakS) and adaption (FRTolS), the instruments were evaluated by expert judges for the relevance of their items to the scales, followed by pretesting. A cross-sectional study was then conducted using a convenience sample of 834 people who responded to invitations sent to a mailing list or to an online invitation on the Brazilian Securities and Exchange Commission website (Comissão de Valores Mobiliários [CVM]). Results Mean age of participants was 39.27 years (standard deviation [SD] = 10.82), they had high educational level (60.9% post-graduate), were married or living together (60%), and their spending power was 41.36 (SD = 13.27). Exploratory and confirmatory analysis identified two factors in FRTakS (Investment and Spending Money), both with 4 items; and identified a single factor in FRTolS, comprising 7 items. Conclusion Reliability indexes for the goodness of fit of the factor structure were satisfactory. There was a positive and significant correlation between the FRTakS Investment factor and FRTolS, confirming convergent validity. The results suggest the existence of a two-dimensional factor structure for FRTakS, and a one-dimensional factor structure for FRTolS. The instruments also exhibited convergent validity with each other.
DOI: 10.6084/m9.figshare.11609130.v1
title: Brazilian Portuguese version of financial risk-taking and tolerance scales: validity evidence within and between measures

description: Abstract Objectives To construct and validate a psychological measure called the Financial Risk-Taking Scale (FRTakS) and to translate, adapt, and validate a psychological measure called the Financial Risk Tolerance Scale (FRTolS) with a Brazilian sample. Exploratory and confirmatory factor analyses were used to assess evidence of the validity of the scales’ internal structures. We also tested the convergent validity between FRTakS and FRTolS. Method After construction (FRTakS) and adaption (FRTolS), the instruments were evaluated by expert judges for the relevance of their items to the scales, followed by pretesting. A cross-sectional study was then conducted using a convenience sample of 834 people who responded to invitations sent to a mailing list or to an online invitation on the Brazilian Securities and Exchange Commission website (Comissão de Valores Mobiliários [CVM]). Results Mean age of participants was 39.27 years (standard deviation [SD] = 10.82), they had high educational level (60.9% post-graduate), were married or living together (60%), and their spending power was 41.36 (SD = 13.27). Exploratory and confirmatory analysis identified two factors in FRTakS (Investment and Spending Money), both with 4 items; and identified a single factor in FRTolS, comprising 7 items. Conclusion Reliability indexes for the goodness of fit of the factor structure were satisfactory. There was a positive and significant correlation between the FRTakS Investment factor and FRTolS, confirming convergent validity. The results suggest the existence of a two-dimensional factor structure for FRTakS, and a one-dimensional factor structure for FRTolS. The instruments also exhibited convergent validity with each other.
DOI: 10.6084/m9.figshare.11609124.v1
title: Prevalence and trends of mental disorders requiring inpatient care in the city of Porto Alegre: a citywide study including all inpatient admissions due to mental disorders in the public system from 2013-2017

description: Abstract Objectives To investigate the 5-year prevalence of patients admitted to public inpatient care units due to a mental disorder, stratifying them by age group and diagnosis, and to assess trends of admissions over this time period in Porto Alegre. Methods All admissions to the public mental health care system regulated by the city-owned electronic system Administração Geral dos Hospitais (AGHOS) were included in the analysis. The total population size was obtained by estimations of Fundação de Economia e Estatística (FEE). General information about 5-year prevalence of inpatient admissions, time-series trends e prevalence by age groups and diagnosis were presented. Results There were 32,608 admissions over the 5-year period analyzed. The overall prevalence of patients was 1.62% among the total population, 0.01% among children, 1.12% among adolescents, 2.28% among adults and 0.93% among the elderly. The most common diagnosis was drug-related, followed by mood, alcohol-related and psychotic disorders. There was a linear trend showing an increase in the number of admissions from 2013 to the midst of 2014, which dropped in 2015. Conclusions Admissions due to mental disorders are relatively common, mainly among adults and related to drug use and mood disorders. Time trends varied slightly over the 5 years. Prevalence rates in real-world settings might be useful for policymakers interested in planning the public mental health system in large Brazilian cities.
DOI: 10.6084/m9.figshare.11609118
title: Alcohol use by Medical Students according to Course and Medical School Characteristics: a Literature Review

description: ABSTRACT Introduction Alcohol is a risk factor for several health conditions and accounts for more than three million deaths per year worldwide. The substance contributes to the development of chronic diseases such as cardiovascular and cancer, as well as for acute conditions related to direct effects on the central nervous system. Despite this, its use is common practice among university students, including medical students. Objectives The objectives were (i) to develop a literature review to identify studies into the prevalence of alcohol use among students at Brazilian medical schools; and (ii) to analyze the estimates of prevalence according to medical course and school characteristics. Method Literature review developed to search publications in the (i) Latin American and Caribbean Center in Health Sciences Information (Lilacs) database, using the word combination [(estudantes de medicina AND álcool)] and in the US National Library of Medicine of National Institute of Health (Medline/Pubmed) database, using the word combination [(medical students AND alcohol AND Brazil)]. Alcohol use patterns in the past seven days, past thirty days, and past year were analyzed by plotting and visualization of point estimates and confidence intervals, as well as correlations. Results Fourteen studies were included in this review. Eight of them were developed in the southeast region. Most institutions were under public administration (n = 8), and were in state capitals (n = 8). The prevalence of alcohol use in the past seven days ranged from 23.0% to 46.5%, in the past thirty days ranged from 20.2% to 87.6%, and in the past year ranged from 79.3% to 92.9%. The correlations between prevalence and workload, and between prevalence and age of school showed a weak intensity on the three use patterns analyzed. The correlation directions followed diversified patterns. In the past seven days, the correlation directions were negative both with workload and age of the school. In the past thirty days, the correlation direction was negative with the workload, and positive with the age of the school. In the past year, the correlation direction was positive with workload, and negative with the age of the school. Conclusions Alcohol use is a recurring theme in Brazilian scientific literature and the estimates of prevalence of its use in the past seven days, in the past thirty days and in the past year are high among medical students. The influence of medical school and the medical course characteristics on the use of psychoactive substances requires more attention from the scientific community, and the involvement of the higher education institutions in controlling the alcohol problem in Brazil is fundamental.
DOI: 10.6084/m9.figshare.11609121
title: Use of Arduino in the Development of a New and Fast Automated Online Preconcentration System Based on Double-Knotted Reactor for the Mn Determination in Tea Samples by Flame Atomic Absorption Spectrometry (F AAS)

description: In the present paper, an automated online preconcentration system based on the use of two knotted reactors (KR) was developed for Mn determination in tea samples by flame atomic absorption spectrometry (F AAS). The system automation was performed by using four solenoid valves to switch sample streams and reagents. Valves were driven electronically by an integrated Darlington transistor circuit and controlled by an open-source Arduino hardware platform written in C language. The preconcentration was based on the precipitation process of metal ions complexed with 2-(5-bromo-2-pyridylazo)-5-(diethylamino)phenol (5-Br-PADAP) on the inner walls of the reactor, followed by elution with a solution of hydrochloric acid. The optimized system allowed the Mn determination with limit of detection (LOD) of 2.1 mg L-1, precision (relative standard deviation (RSD), 50.0 mg L-1) of 2.6% and enrichment factors of 8. The system presented a sampling frequency of 60 h-1. The method accuracy was evaluated by analysis of the certified reference material (CRM) apple leaves (NIST 1515) and by addition/recovery tests obtaining recoveries between 95.2 to 119%. This method was applied in the Mn determination in commercial tea samples purchased from local trade. Manganese levels were found in a concentration range of 2.95 to 123 µg g-1.
DOI: 10.6084/m9.figshare.11609118.v1
title: Alcohol use by Medical Students according to Course and Medical School Characteristics: a Literature Review

description: ABSTRACT Introduction Alcohol is a risk factor for several health conditions and accounts for more than three million deaths per year worldwide. The substance contributes to the development of chronic diseases such as cardiovascular and cancer, as well as for acute conditions related to direct effects on the central nervous system. Despite this, its use is common practice among university students, including medical students. Objectives The objectives were (i) to develop a literature review to identify studies into the prevalence of alcohol use among students at Brazilian medical schools; and (ii) to analyze the estimates of prevalence according to medical course and school characteristics. Method Literature review developed to search publications in the (i) Latin American and Caribbean Center in Health Sciences Information (Lilacs) database, using the word combination [(estudantes de medicina AND álcool)] and in the US National Library of Medicine of National Institute of Health (Medline/Pubmed) database, using the word combination [(medical students AND alcohol AND Brazil)]. Alcohol use patterns in the past seven days, past thirty days, and past year were analyzed by plotting and visualization of point estimates and confidence intervals, as well as correlations. Results Fourteen studies were included in this review. Eight of them were developed in the southeast region. Most institutions were under public administration (n = 8), and were in state capitals (n = 8). The prevalence of alcohol use in the past seven days ranged from 23.0% to 46.5%, in the past thirty days ranged from 20.2% to 87.6%, and in the past year ranged from 79.3% to 92.9%. The correlations between prevalence and workload, and between prevalence and age of school showed a weak intensity on the three use patterns analyzed. The correlation directions followed diversified patterns. In the past seven days, the correlation directions were negative both with workload and age of the school. In the past thirty days, the correlation direction was negative with the workload, and positive with the age of the school. In the past year, the correlation direction was positive with workload, and negative with the age of the school. Conclusions Alcohol use is a recurring theme in Brazilian scientific literature and the estimates of prevalence of its use in the past seven days, in the past thirty days and in the past year are high among medical students. The influence of medical school and the medical course characteristics on the use of psychoactive substances requires more attention from the scientific community, and the involvement of the higher education institutions in controlling the alcohol problem in Brazil is fundamental.
DOI: 10.6084/m9.figshare.11609121.v1
title: Use of Arduino in the Development of a New and Fast Automated Online Preconcentration System Based on Double-Knotted Reactor for the Mn Determination in Tea Samples by Flame Atomic Absorption Spectrometry (F AAS)

description: In the present paper, an automated online preconcentration system based on the use of two knotted reactors (KR) was developed for Mn determination in tea samples by flame atomic absorption spectrometry (F AAS). The system automation was performed by using four solenoid valves to switch sample streams and reagents. Valves were driven electronically by an integrated Darlington transistor circuit and controlled by an open-source Arduino hardware platform written in C language. The preconcentration was based on the precipitation process of metal ions complexed with 2-(5-bromo-2-pyridylazo)-5-(diethylamino)phenol (5-Br-PADAP) on the inner walls of the reactor, followed by elution with a solution of hydrochloric acid. The optimized system allowed the Mn determination with limit of detection (LOD) of 2.1 mg L-1, precision (relative standard deviation (RSD), 50.0 mg L-1) of 2.6% and enrichment factors of 8. The system presented a sampling frequency of 60 h-1. The method accuracy was evaluated by analysis of the certified reference material (CRM) apple leaves (NIST 1515) and by addition/recovery tests obtaining recoveries between 95.2 to 119%. This method was applied in the Mn determination in commercial tea samples purchased from local trade. Manganese levels were found in a concentration range of 2.95 to 123 µg g-1.
DOI: 10.6084/m9.figshare.11609112
title: Bone scan positivity in non-metastatic, castrate-resistant prostate cancer: external validation study

description: ABSTRACT Introduction: Tables predicting the probability of a positive bone scan in men with non-metastatic, castrate-resistant prostate cancer have recently been reported. We performed an external validation study of these bone scan positivity tables. Materials and Methods: We performed a retrospective cohort study of patients seen at a tertiary care medical center (1996-2012) to select patients with non-metastatic, castrate-resistant prostate cancer. Abstracted data included demographic, anthropometric, and disease-specific data such as patient race, BMI, PSA kinetics, and primary treatment. Primary outcome was metastasis on bone scan. Multivariable logistic regression was performed using generalized estimating equations to adjust for repeated measures. Risk table performance was assessed using ROC curves. Results: We identified 6.509 patients with prostate cancer who had received hormonal therapy with a post-hormonal therapy PSA ≥2ng/mL, 363 of whom had non-metastatic, castrate-resistant prostate cancer. Of these, 187 patients (356 bone scans) had calculable PSA kinetics and ≥1 bone scan. Median follow-up after castrate-resistant prostate cancer diagnosis was 32 months (IQR: 19-48). There were 227 (64%) negative and 129 (36%) positive bone scans. On multivariable analysis, higher PSA at castrate-resistant prostate cancer (4.67 vs. 4.4ng/mL, OR=0.57, P=0.02), shorter time from castrate-resistant prostate cancer to scan (7.9 vs. 14.6 months, OR=0.97, P=0.006) and higher PSA at scan (OR=2.91, P &lt;0.0001) were significantly predictive of bone scan positivity. The AUC of the previously published risk tables for predicting scan positivity was 0.72. Conclusion: Previously published risk tables predicted bone scan positivity in men with non-metastatic, castrate-resistant prostate cancer with reasonable accuracy.
DOI: 10.6084/m9.figshare.11609115
title: SIMULATION AND EXPERIMENTAL INVESTIGATION OF POWER CONSUMPTION, GAS DISPERSION AND MASS TRANSFER COEFFICIENT IN A MULTI-PHASE STIRRED BIOREACTOR

description: Abstract Bio-oxidation leaching of refractory gold concentrate was carried out in a typical gas-liquid-solid three-phase stirred bioreactor. The bacteria, which adhered to solid particle surfaces and spread over the liquid phase, require sufficient oxygen and nutrient of carbon and nitrogen, and then the mass transfer rate should be considered. However, the mass transfer coefficient, which could be used to evaluate the mass transfer rate, was determined by gas holdup, bubble diameter and power consumption. Therefore, a three-phase Eulerian equation with k-ε turbulence model and additional models of two bubble diameter, a torque and a mass transfer coefficient were applied in the simulation. The simulation results were validated with experimental data and used to analyze the spatial distribution of the mass transfer coefficient. The results demonstrated that the simulation and experimental data of Sauter mean bubble diameter and power number were in good agreement and the simulation results of the mass transfer coefficient were agree with the values calculated by an empirical correlation. The Davoody model can be strongly recommended for further simulation of the bubble diameter, and the gas holdup and mass transfer coefficient were very unevenly distributed in the lower zone. Hence, the lower impeller clearance should be considered.