cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.8227271
title: Antibiofilm Activity of an Experimental Ricinus Communis Dentifrice on Soft Denture Liners

description: Abstract The disadvantage of liners materials is the difficulty of biofilm control. It was compared an experimental dentifrice contained Ricinus communis, with commercials dentifrices as antibiofilm activity against microorganisms on denture liner. Six hundred specimens were distributed in 5 groups (n=18/ microorganism): water; experimental dentifrice; specific dentifrice for denture and two conventional dentifrices against C. albicans; C. glabrata; S. mutans; S. aureus; E. coli. Each group had a negative (n=5; without contamination) and positive control (n=15/ microorganism; without cleaning). The antibiofilm activity was evaluated by the method of biofilm formation in triplicate. The specimens were contaminated in a standard way and incubated. After that, manual brushing was performed (60 s), washed with PBS, immersed in liquid culture medium for resuspension and sowing in solid medium. The results (mean of triplicates) were expressed in CFU/mL. The data was submitted to Shapiro-Wilk, ANOVA and Tukey test (p&lt;0.05). The specific dentifrice (1.27±1.20) was the most effective against S. mutans, followed by conventional (Trihydral, 3.13±0.88; Colgate, 2.16±2.02) and experimental (3.81±1.37) dentifrices, which were similar to each other (p=0.008). All of them were different from water (4.79±1.42). The specific (0.21±0.21) and experimental (0.36±0.25) dentifrices were similar against S. aureus, with a higher mean of CFU when compared to conventional (Colgate, 0.06±0.13), which was more efficient (p=0.000). For C. albicans, C. glabrata and E. coli, all dentifrices were similar to water (p=0.186). It was concluded, that the experimental dentifrice was effective against S. aureus and had not efficacy against Candida spp.; S. mutans; E. coli, as occurred with the commercials dentifrices.
DOI: 10.6084/m9.figshare.8227274.v1
title: Esquema Explícito Semi-Analítico para a Solução da Equação da Onda Unidimensional com Condições de Contorno Naturais

description: ABSTRACT This paper discusses the development of an semi-analytical explicit scheme for solving the non-homogeneous one-dimensional wave equation. A space-time mesh was constructed through the incremental relation c Δ t = Δ x, such that control volume were formed from the characteristic lines of said equation. Schemes were developed from the integral form of the conservation law on these control volumes. They have the property of null local truncation error, even in cases not homogeneous or generalized solution. The method facilitates the inclusion of the initial and boundary conditions, also inserted without the need for approximation techniques. Considering the developments and numerical experiments performed, we conclude that the proposed scheme is an excellent numerical technique, with great accuracy and robustness to solve the one-dimensional linear wave problem.
DOI: 10.6084/m9.figshare.8227271.v1
title: Antibiofilm Activity of an Experimental Ricinus Communis Dentifrice on Soft Denture Liners

description: Abstract The disadvantage of liners materials is the difficulty of biofilm control. It was compared an experimental dentifrice contained Ricinus communis, with commercials dentifrices as antibiofilm activity against microorganisms on denture liner. Six hundred specimens were distributed in 5 groups (n=18/ microorganism): water; experimental dentifrice; specific dentifrice for denture and two conventional dentifrices against C. albicans; C. glabrata; S. mutans; S. aureus; E. coli. Each group had a negative (n=5; without contamination) and positive control (n=15/ microorganism; without cleaning). The antibiofilm activity was evaluated by the method of biofilm formation in triplicate. The specimens were contaminated in a standard way and incubated. After that, manual brushing was performed (60 s), washed with PBS, immersed in liquid culture medium for resuspension and sowing in solid medium. The results (mean of triplicates) were expressed in CFU/mL. The data was submitted to Shapiro-Wilk, ANOVA and Tukey test (p&lt;0.05). The specific dentifrice (1.27±1.20) was the most effective against S. mutans, followed by conventional (Trihydral, 3.13±0.88; Colgate, 2.16±2.02) and experimental (3.81±1.37) dentifrices, which were similar to each other (p=0.008). All of them were different from water (4.79±1.42). The specific (0.21±0.21) and experimental (0.36±0.25) dentifrices were similar against S. aureus, with a higher mean of CFU when compared to conventional (Colgate, 0.06±0.13), which was more efficient (p=0.000). For C. albicans, C. glabrata and E. coli, all dentifrices were similar to water (p=0.186). It was concluded, that the experimental dentifrice was effective against S. aureus and had not efficacy against Candida spp.; S. mutans; E. coli, as occurred with the commercials dentifrices.
DOI: 10.6084/m9.figshare.8227262
title: Influence of Pre-Curing Different Adhesives on the Color Stability of Cemented Thin Ceramic Veneers

description: Abstract The objective was to evaluate the color stability of thin ceramic veneers as a function of the curing mode (with and without pre-cure) of different adhesive systems applied to the internal surface of ceramics. Five adhesive systems (Scotchbond Multi-Purpose, Single Bond Universal, Gluma 2 Bond, Ambar, and Ambar APS) and photo-cured resin cement (Allcem Veneer) were used for cementing 0.6 mm-thick feldspathic veneers (Mark II) on composite resin substrates (Charisma Diamond). The groups, according to adhesive system, were divided into two subgroups (n=10): i) adhesive and resin cement were polymerized separately (pre-cure of the adhesive), ii) adhesive and resin cement were polymerized simultaneously. The CIELab color parameters were determined with a spectrophotometer at 24h (baseline), 7 days, 30 days and 12 months. Data were analyzed by two-way ANOVA and Tukey’s test (α=0.05). The results indicated statistically significant differences for adhesive systems and time. The mode of curing of the adhesive system was not statistically significant: pre-cured adhesives (2.6±1.3) and not pre-cured adhesives (2.8±1.4). For the adhesives, ΔE values varied in the following order: Ambar-APS (1.6±0.5) &lt; Scotchbond Multi-Purpose (2.6±1.2) = Gluma 2 Bond (2.7±1.2) = Ambar (2.9±1.2) &lt; Single Bond Universal (3.5±1.5). For time, ΔE values were: 7 days (1.7±0.7), 30 days (3.5±1.2) and 12 months (2.9±1.3). It can be concluded that the different adhesive systems used for cementing thin ceramic veneers influenced the final color of the indirect restorations. The adhesives curing mode did not present a significant effect in the color stability of thin ceramic veneers.
DOI: 10.6084/m9.figshare.8227256
title: Evaluation of meteorological conditions influence on fine particulate matter (PM 2.5 ) concentration in Belo Horizonte, MG, Brazil

description: ABSTRACT The increase of air pollution in urban centres due to the growth of industrial facilities and vehicular fleet is a problem that causes environmental damage and affects human health, mainly due to the inhalation of fine particulate matter (PM2.5). For this reason, the aim of this study was to evaluate the influence of meteorological conditions on PM2.5 concentration in Belo Horizonte, using data sampled from the winter of 2007 to the autumn of 2008. In addition, the differences in meteorological data and PM2.5 concentration between the seasons of the year in this study’s period were also assessed. For this, correlation statistical tests were performed for meteorological data and PM2.5 concentration, as well as significance analysis to evaluate the differences between these two parameters in the dry and wet periods, characteristic of the study area. It was observed a significant difference between PM2.5 concentration in dry and wet periods. Significant differences were also observed between meteorological parameters (relative humidity, minimum, mean and maximum temperature and wind direction) for these periods. Spearman’s correlation analysis showed a significant correlation between PM2.5 concentration and the meteorological parameters precipitation and relative humidity.
DOI: 10.6084/m9.figshare.8227259
title: Energy Balance in Terms of Land Use Changes in the Southern of Mato Grosso State

description: Abstract The conversion of native vegetation to agricultural areas modifies the dynamics of energy exchange in the soil-plant-atmosphere system. Thus, the objective of this study was to evaluate the effect in energy balance and evapotranspiration in the southern state of Mato Grosso due to the conversion of a Cerrado area in agronomic crops. The study was leading in areas of Cerradão, Cerrado strictu sensu, mango grove, teak culture, coconut trees and pasture. The energy balance was estimated by SEBAL (Surface Energy Balance Algorithm for Land) using weather station data and images from Landsat 5 TM sensor obtained in 2010. The net radiation showed lower values in pasture than in the Cerrado. The latent heat flux in the Cerrado was higher by 60% in relation to agronomic crops. The sensible heat flux in agricultural areas were 50% higher than Cerrado areas. The Cerradão and Mangueiral showed lower heat flux values on the ground. Although this study does not represent the entire Cerrado of Mato Grosso, the results showed the impact of the Cerrado into agricultural areas in the energy balance.
DOI: 10.6084/m9.figshare.8227262.v1
title: Influence of Pre-Curing Different Adhesives on the Color Stability of Cemented Thin Ceramic Veneers

description: Abstract The objective was to evaluate the color stability of thin ceramic veneers as a function of the curing mode (with and without pre-cure) of different adhesive systems applied to the internal surface of ceramics. Five adhesive systems (Scotchbond Multi-Purpose, Single Bond Universal, Gluma 2 Bond, Ambar, and Ambar APS) and photo-cured resin cement (Allcem Veneer) were used for cementing 0.6 mm-thick feldspathic veneers (Mark II) on composite resin substrates (Charisma Diamond). The groups, according to adhesive system, were divided into two subgroups (n=10): i) adhesive and resin cement were polymerized separately (pre-cure of the adhesive), ii) adhesive and resin cement were polymerized simultaneously. The CIELab color parameters were determined with a spectrophotometer at 24h (baseline), 7 days, 30 days and 12 months. Data were analyzed by two-way ANOVA and Tukey’s test (α=0.05). The results indicated statistically significant differences for adhesive systems and time. The mode of curing of the adhesive system was not statistically significant: pre-cured adhesives (2.6±1.3) and not pre-cured adhesives (2.8±1.4). For the adhesives, ΔE values varied in the following order: Ambar-APS (1.6±0.5) &lt; Scotchbond Multi-Purpose (2.6±1.2) = Gluma 2 Bond (2.7±1.2) = Ambar (2.9±1.2) &lt; Single Bond Universal (3.5±1.5). For time, ΔE values were: 7 days (1.7±0.7), 30 days (3.5±1.2) and 12 months (2.9±1.3). It can be concluded that the different adhesive systems used for cementing thin ceramic veneers influenced the final color of the indirect restorations. The adhesives curing mode did not present a significant effect in the color stability of thin ceramic veneers.
DOI: 10.6084/m9.figshare.8227250
title: Simple Practices in Climatological Analyses: A Review

description: Abstract Many studies in Meteorology and Climatology use methodologies that overestimate or even underestimate the statistical significance of the results. Analyses that underestimate the role of trends and temporal or spatial dependency in the data sets can lead to incorrect conclusions. On the other hand, unnecessarily rigorous analyses can undermine the conclusions. The objective of this article is to discuss some simple practices, commonly neglected, that can produce results much more robust and statistically significant. This paper discusses some problems related to the calculation of the mean annual cycle and anomalies, trend analyzes, and temporal and spatial dependency, emphasizing statistical hypothesis testing.
DOI: 10.6084/m9.figshare.8227253
title: Estimating the mass transfer coefficient using the floating soluble probes technique: a laboratory study

description: ABSTRACT The floating solid soluble probe is a low-cost technique for estimating the mass transfer coefficient of oxygen in the air-water interface (Ka). This technique is based on the fact that Ka can be correlated with the dissolution rate of a soluble solid (VS), since both parameters are influenced by the surface turbulence. The aim of this study was to calibrate a new floating solid soluble probe configuration. Surface reaeration experiments and dissolution of the soluble solid probe were performed in two experimental apparatus (jets stirred tank and a circular hydraulic channel), in which different levels of turbulence were produced. The results showed a strong correlation between Ka and VS, r = 0.953 for experiments performed on the tank and r = 0.895 for experiments performed on the channel. The new floating solid soluble probe configuration provided an increasing Ka.VS -1 ratio as a function of the Reynolds number, indicating that the relationship between these two parameters depends on the surface turbulence. We conclude that the floating solid soluble probe technique has a high potential, despite calibrations in natural water bodies and equipment with a turbulence structure different from those used in this study are still necessary to definitive utility.
DOI: 10.6084/m9.figshare.8227256.v1
title: Evaluation of meteorological conditions influence on fine particulate matter (PM 2.5 ) concentration in Belo Horizonte, MG, Brazil

description: ABSTRACT The increase of air pollution in urban centres due to the growth of industrial facilities and vehicular fleet is a problem that causes environmental damage and affects human health, mainly due to the inhalation of fine particulate matter (PM2.5). For this reason, the aim of this study was to evaluate the influence of meteorological conditions on PM2.5 concentration in Belo Horizonte, using data sampled from the winter of 2007 to the autumn of 2008. In addition, the differences in meteorological data and PM2.5 concentration between the seasons of the year in this study’s period were also assessed. For this, correlation statistical tests were performed for meteorological data and PM2.5 concentration, as well as significance analysis to evaluate the differences between these two parameters in the dry and wet periods, characteristic of the study area. It was observed a significant difference between PM2.5 concentration in dry and wet periods. Significant differences were also observed between meteorological parameters (relative humidity, minimum, mean and maximum temperature and wind direction) for these periods. Spearman’s correlation analysis showed a significant correlation between PM2.5 concentration and the meteorological parameters precipitation and relative humidity.
DOI: 10.6084/m9.figshare.8227259.v1
title: Energy Balance in Terms of Land Use Changes in the Southern of Mato Grosso State

description: Abstract The conversion of native vegetation to agricultural areas modifies the dynamics of energy exchange in the soil-plant-atmosphere system. Thus, the objective of this study was to evaluate the effect in energy balance and evapotranspiration in the southern state of Mato Grosso due to the conversion of a Cerrado area in agronomic crops. The study was leading in areas of Cerradão, Cerrado strictu sensu, mango grove, teak culture, coconut trees and pasture. The energy balance was estimated by SEBAL (Surface Energy Balance Algorithm for Land) using weather station data and images from Landsat 5 TM sensor obtained in 2010. The net radiation showed lower values in pasture than in the Cerrado. The latent heat flux in the Cerrado was higher by 60% in relation to agronomic crops. The sensible heat flux in agricultural areas were 50% higher than Cerrado areas. The Cerradão and Mangueiral showed lower heat flux values on the ground. Although this study does not represent the entire Cerrado of Mato Grosso, the results showed the impact of the Cerrado into agricultural areas in the energy balance.
DOI: 10.6084/m9.figshare.8227250.v1
title: Simple Practices in Climatological Analyses: A Review

description: Abstract Many studies in Meteorology and Climatology use methodologies that overestimate or even underestimate the statistical significance of the results. Analyses that underestimate the role of trends and temporal or spatial dependency in the data sets can lead to incorrect conclusions. On the other hand, unnecessarily rigorous analyses can undermine the conclusions. The objective of this article is to discuss some simple practices, commonly neglected, that can produce results much more robust and statistically significant. This paper discusses some problems related to the calculation of the mean annual cycle and anomalies, trend analyzes, and temporal and spatial dependency, emphasizing statistical hypothesis testing.
DOI: 10.6084/m9.figshare.8227241
title: Factors and mass ratio analyses for Reactive Blue 19 dye decolorization using ozone: an experimental and analytical modelling approach

description: ABSTRACT Dyes highly reduce sunlight penetration into the stream, and consequently affect photosynthesis and oxygen transfer into water bodies. An experimental and analytical modelling approach to Reactive Blue 19 (RB19) removal using ozone was carried out. For this purpose, factors and mass ratio analyses were assessed based on batch assays experiments. Removal efficiency increased from 64 to 94% when the dosage increased from 38.4 to 153.6 mg O3.L-1. Results showed that RB19 is more efficiently removed when initial pH is 7. The rate of RB19 removal decreased as the initial dye concentration increased. Kinetic studies showed that the ozonation of RB19 was a pseudo first-order reaction with respect to the dye, and the apparent rate constant declined logarithmically with the initial dye concentration. Mass ratio studies showed that, for the empirical analysis, the power law equation was adequate to describe mass ratio over time and the analytical analysis suggests that the process is influenced by mass transfer in the liquid film as well as in the bulk fluid.
DOI: 10.6084/m9.figshare.8227253.v1
title: Estimating the mass transfer coefficient using the floating soluble probes technique: a laboratory study

description: ABSTRACT The floating solid soluble probe is a low-cost technique for estimating the mass transfer coefficient of oxygen in the air-water interface (Ka). This technique is based on the fact that Ka can be correlated with the dissolution rate of a soluble solid (VS), since both parameters are influenced by the surface turbulence. The aim of this study was to calibrate a new floating solid soluble probe configuration. Surface reaeration experiments and dissolution of the soluble solid probe were performed in two experimental apparatus (jets stirred tank and a circular hydraulic channel), in which different levels of turbulence were produced. The results showed a strong correlation between Ka and VS, r = 0.953 for experiments performed on the tank and r = 0.895 for experiments performed on the channel. The new floating solid soluble probe configuration provided an increasing Ka.VS -1 ratio as a function of the Reynolds number, indicating that the relationship between these two parameters depends on the surface turbulence. We conclude that the floating solid soluble probe technique has a high potential, despite calibrations in natural water bodies and equipment with a turbulence structure different from those used in this study are still necessary to definitive utility.
DOI: 10.6084/m9.figshare.8227238
title: Study of poultry carcass biodegradation through the Composting process in closed discontinuous digesters

description: ABSTRACT The study on poultry carcasses’ biodegradation through composting in closed discontinuous digesters enabled the evaluation of composting as an alternative for the treatment of solid waste generated on farms. The study began with the characterization of the waste that would be used in the process and went through the analysis and monitoring of the identified parameters to evaluate the composting process inside the digester. The composting was found satisfactory at the end of the process, and all carcasses were totally degraded and did not present any environmental risks.
DOI: 10.6084/m9.figshare.8227235
title: Applicability of the body adiposity index to estimate body fat in adolescents with type-1 diabetes mellitus

description: ABSTRACT The aim of the present study was to verify the level of concordance between Body Adiposity Index (BAI) and Dual-energy X-ray Absorptiometry (DEXA) in the evaluation of body fat percentage in adolescents with type-1 diabetes mellitus (DM1). The sample consisted of 34 adolescents (16 boys and 18 girls) aged 10-15 years. Height and hip circumference data were collected for BAI calculation, and fat percentage was evaluated using DEXA. The Shapiro Wilk test was used to verify data normality. The Wilcoxon test was performed to compare age, anthropometric and BMI, BAI z score and DEXA between sexes. The correlation of variables (BAI vs DEXA) was evaluated by the Spearman correlation coefficient. For the analysis of residual scores, the Bland-Altman test was applied. The Kappa coefficient (k) was performed to assess the level of concordance between BAI and DEXA. Therefore, weak and non-significant correlation between BAI and DEXA in boys (r= 0.19, p= 0.46), and girls (r= 0.10, p= 0.73) was observed. Thus, weak concordance was observed (k= 0.09) for both sexes. It was concluded that BAI is not recommended to estimate fat percentage in adolescents with DM1.
DOI: 10.6084/m9.figshare.8227232
title: Relationship between sexual hormones, quality of life and postmenopausal sexual function

description: Abstract Objective To assess the relationship between sexual hormones, sexual function and quality of life in postmenopausal women. Method A cross-sectional study was conducted with a convenience sample of 36 postmenopausal women between the ages of 45 and 65 in follow-up at a climacteric outpatient clinic. Mood, quality of life, sexual function and hormonal profile were assessed. Results With regard to sexual hormones and sexual function, a relationship was found between orgasm and luteinizing hormone (r=0.37), orgasm and sex hormone-binding globulin (SHBG) (r=0.39), SHBG and less pain (r=0.44), dehydroepiandrosterone (DHEA) and desire (r=-0.45), as well as between prolactin and lubrication (r=0.33). Sexual hormones and quality of life were related as follows: progesterone and limitations due to physical aspects (r=0.35), SHBG and social aspects (r=0.35), cortisol and pain (r=0.46), DHEA and social aspects (r=-0.40). Finally, the following relationships were found between sexual function and quality of life: sexual desire and vitality, social aspects, state of general health and mental health (r=0.46, r=0.51, r=0.35, and r=0.38, respectively). Arousal, orgasm and satisfaction with sexual life showed a relationship with less physical pain (r=0.40, r=0.42, and r=0.43, respectively). Satisfaction with sexual life was correlated with vitality (r=0.33). Conclusion Different correlations than expected were found in this study regarding the effect of some hormones on sexual function and some aspects of the quality of life of postmenopausal women.