cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.5772120.v1
title: Box-Behnken design for COD removal of textile wastewater using electrocoagulation with pulsed DC

description: ABSTRACT The effective and economically viable removal of industrial wastewater pollutants is still a challenge. Thus, this study proposed to investigate the electrocoagulation technology (EC) for the treatment of textile effluent using pulsed direct current (CCP). The methodology of Box-Behnken response surface was used to analyze and optimize the operating conditions, aimed at maximum chemical oxygen demand (COD) removal. The experiments were performed with a reaction volume of 2.6 L in batch mode. Based on these results, the optimal configuration was: agitation speed = 200 rpm, frequency of pulses = 1,000 Hz and spacing between electrodes = 1 mm, in 50 minutes of EC. Under these conditions it was obtained a COD removal of 81.23% (remainder value of 152 mg O2.L-1). In addition, it was found that the EC process is also effective for reduction of color, turbidity, total suspended solids, sulfate and sulfide. The concentration of chloride ions was not modified during the EC, presenting itself as a favorable aspect for the reuse of treated wastewater in the textile production process itself, which demands a high concentration of NaCl.
DOI: 10.6084/m9.figshare.5772117
title: Evaluation of Influence of Salt in the Cement Hydration to Oil Wells

description: The influence of NaCl salt in the hydration of the Portland cement paste class G was studied using a Non Conventional Differential Thermal Analysis (NCDTA) on the first 24 hours of cement hydration. The mass of salt used corresponds to 0, 5, 10, 15 and 20% of mass of water used in the preparation of the pastes. The water/cement ratio (w/c) remained constant, being 0.46, and the pastes final volume was 99.9mL. Applying a deconvolution method to separate overlapped NCDTA peaks it was possible to estimate the energy released during the different stages of hydration and the effect of salt in cement hydration process. The presence of up to 10% of salt accelerated the hydration process and increased the hydration of C3S and C3A, while the 20% of the salt causes a delayed hydration and decreased the hydration of C3S and C3A. Futhermore, cement pastes with the same percentages of NaCl and with different hydration times were evaluated by Thermogravimetry (TG), Derivative Thermogravimetry (DTG) and Differential Thermal Analysis (DTA). After 28 days the presence of salt caused a greater increase in the formation of hydrated products.
DOI: 10.6084/m9.figshare.5772117.v1
title: Evaluation of Influence of Salt in the Cement Hydration to Oil Wells

description: The influence of NaCl salt in the hydration of the Portland cement paste class G was studied using a Non Conventional Differential Thermal Analysis (NCDTA) on the first 24 hours of cement hydration. The mass of salt used corresponds to 0, 5, 10, 15 and 20% of mass of water used in the preparation of the pastes. The water/cement ratio (w/c) remained constant, being 0.46, and the pastes final volume was 99.9mL. Applying a deconvolution method to separate overlapped NCDTA peaks it was possible to estimate the energy released during the different stages of hydration and the effect of salt in cement hydration process. The presence of up to 10% of salt accelerated the hydration process and increased the hydration of C3S and C3A, while the 20% of the salt causes a delayed hydration and decreased the hydration of C3S and C3A. Futhermore, cement pastes with the same percentages of NaCl and with different hydration times were evaluated by Thermogravimetry (TG), Derivative Thermogravimetry (DTG) and Differential Thermal Analysis (DTA). After 28 days the presence of salt caused a greater increase in the formation of hydrated products.
DOI: 10.6084/m9.figshare.5772111
title: Estimation of Kinetic Parameters During the Treatment of Steelmaking Slag Expansibility Data

description: Steelmaking slag (SS) is one of the largest generation waste in the integrated and semi-integrated plants, but it has application restrictions due to its high expansibility. To overcome these constraints, this research had as its main objective the reactions is kinetics parameters estimation that result in the expansion of SS using the Arrhenius global equation. It was obtained 12.5 kJ/mol for activation energy and 260.42% for the pre-exponential factor. It was also noted that the temperature significantly impacts the final expansion values, increasing them exponentially. Furthermore the time of expansion of the slag obey an asymptotic equation (Exp = a - b.ct) whose results presented initially having a large expansion velocity, which tends to zero at times very long when the material has stabilized.
DOI: 10.6084/m9.figshare.5772111.v1
title: Estimation of Kinetic Parameters During the Treatment of Steelmaking Slag Expansibility Data

description: Steelmaking slag (SS) is one of the largest generation waste in the integrated and semi-integrated plants, but it has application restrictions due to its high expansibility. To overcome these constraints, this research had as its main objective the reactions is kinetics parameters estimation that result in the expansion of SS using the Arrhenius global equation. It was obtained 12.5 kJ/mol for activation energy and 260.42% for the pre-exponential factor. It was also noted that the temperature significantly impacts the final expansion values, increasing them exponentially. Furthermore the time of expansion of the slag obey an asymptotic equation (Exp = a - b.ct) whose results presented initially having a large expansion velocity, which tends to zero at times very long when the material has stabilized.
DOI: 10.6084/m9.figshare.5772108
title: Destructive Divorce in the Family Life Cycle and its Implications: Criticisms of Parental Alienation

description: ABSTRACT Some difficulties may arise during the divorce process, taking the family into “destructive divorce”. In such cases, some authors can see the rising of Parental Alienation (PA). This article aims to criticize PA, reflecting about the Family Life Cycle and divorce. Regarding this, a qualitative study was conducted with legal actors (judges, prosecutors, psychologists, social workers, lawyers) on the issues of divorce and PA and the results were built using the conceptions of Zones of Sense by Gonzalez Rey. The summary results are: (a) PA does not contextualize the conflict; (b) it does not consider the history of the relationships; (c) it pathologizes, medicates and criminalizes the phenomena of post-divorce and (d) PA underestimates the child in the conflict.
DOI: 10.6084/m9.figshare.5772108.v1
title: Destructive Divorce in the Family Life Cycle and its Implications: Criticisms of Parental Alienation

description: ABSTRACT Some difficulties may arise during the divorce process, taking the family into “destructive divorce”. In such cases, some authors can see the rising of Parental Alienation (PA). This article aims to criticize PA, reflecting about the Family Life Cycle and divorce. Regarding this, a qualitative study was conducted with legal actors (judges, prosecutors, psychologists, social workers, lawyers) on the issues of divorce and PA and the results were built using the conceptions of Zones of Sense by Gonzalez Rey. The summary results are: (a) PA does not contextualize the conflict; (b) it does not consider the history of the relationships; (c) it pathologizes, medicates and criminalizes the phenomena of post-divorce and (d) PA underestimates the child in the conflict.
DOI: 10.6084/m9.figshare.5772105
title: Optimized Limited Size Printed Bowtie Antenna for UHF RFID Readers

description: Abstract A novel design of a printed bowtie antenna without a ground plane and with size below a quarter wavelength for RFID readers is presented. Due to the lack of a ground plane, the designed antenna has omnidirectional characteristics and is insensitive to small permittivity deviations. For matching purposes without introducing gain distortion, a shorting strip connecting the radiating arms and four triangular shaped extensions of the radiating arms are added to the antenna design. Measurements show that operation in the 915 MHz band is met with a bandwidth of 13% (S11 &lt; -10 dB) and gain around 2 dBi, while presenting an omnidirectional radiation pattern. Also, the proposed antenna design can be easily modified to operate at neighboring frequency bands.
DOI: 10.6084/m9.figshare.5772105.v1
title: Optimized Limited Size Printed Bowtie Antenna for UHF RFID Readers

description: Abstract A novel design of a printed bowtie antenna without a ground plane and with size below a quarter wavelength for RFID readers is presented. Due to the lack of a ground plane, the designed antenna has omnidirectional characteristics and is insensitive to small permittivity deviations. For matching purposes without introducing gain distortion, a shorting strip connecting the radiating arms and four triangular shaped extensions of the radiating arms are added to the antenna design. Measurements show that operation in the 915 MHz band is met with a bandwidth of 13% (S11 &lt; -10 dB) and gain around 2 dBi, while presenting an omnidirectional radiation pattern. Also, the proposed antenna design can be easily modified to operate at neighboring frequency bands.
DOI: 10.6084/m9.figshare.5772102
title: Predicting Condom Use: A Comparison of the Theory of Reasoned Action, the Theory of Planned Behavior and an Extended Model of TPB

description: ABSTRACT It was our goal to give a contribution to the prediction of condom use using socio-cognitive models, comparing classic theories to an extended model. A cross-sectional study was conducted using a questionnaire of self-reported measures. From the students who agreed to participate in the study, 140 were eligible for the full study. A confirmatory analysis was used to assess the predictive value of the researched model. The model tested had slightly better fit indexes and predictive value than classic Theories of Reasoned Action and Planned Behaviour. Although the results found, discussion continues to understand the gap between intention and behaviour, as further investigation is necessary to fully understand the reasons for condom use inconsistency.
DOI: 10.6084/m9.figshare.5772102.v1
title: Predicting Condom Use: A Comparison of the Theory of Reasoned Action, the Theory of Planned Behavior and an Extended Model of TPB

description: ABSTRACT It was our goal to give a contribution to the prediction of condom use using socio-cognitive models, comparing classic theories to an extended model. A cross-sectional study was conducted using a questionnaire of self-reported measures. From the students who agreed to participate in the study, 140 were eligible for the full study. A confirmatory analysis was used to assess the predictive value of the researched model. The model tested had slightly better fit indexes and predictive value than classic Theories of Reasoned Action and Planned Behaviour. Although the results found, discussion continues to understand the gap between intention and behaviour, as further investigation is necessary to fully understand the reasons for condom use inconsistency.
DOI: 10.6084/m9.figshare.5772090
title: Lysozyme gene treatment in testosterone induced benign prostate hyperplasia rat model and comparasion of its’ effectiveness with botulinum toxin injection

description: ABSTRACT Objectives: To compare the effects and histopathological changes of botulinum neurotoxin type A and lysozyme gene injections into prostate tissue within a testosterone induced benign prostate hyperplasia rat model. Materials and Methods: 40 male Wistar rats were randomized into four Groups. Group-1: Control, Group-2: Testosterone replacement, Group-3: Testosterone+botulinum neurotoxin type A, Group-4: Testosterone+plazmid DNA/liposome complex. Results: Estimated prostate volume of the testosterone injected Groups were higher than the control (p &lt;0.05). Actual prostate weight of the testosterone injected Groups was higher than the control Group (p &lt;0.05). Testosterone undecanoate increased the prostate weight by 39%. Botulinum neurotoxin type A treatment led to an estimated prostate volume and actual prostate weights decreased up to 32.5% in rats leading to prostate apoptosis. Lysozyme gene treatment led to an estimated prostate volume and actual prostate weights decrease up to 38.7%. Conclusion: Lysozyme gene and botulinum neurotoxin type A treatments for prostate volume decreasing effect have been verified in the present study that could be anew modality of treatment in prostatic benign hyperplasia that needs to be verified in large randomized human experimental studies.
DOI: 10.6084/m9.figshare.5772090.v1
title: Lysozyme gene treatment in testosterone induced benign prostate hyperplasia rat model and comparasion of its’ effectiveness with botulinum toxin injection

description: ABSTRACT Objectives: To compare the effects and histopathological changes of botulinum neurotoxin type A and lysozyme gene injections into prostate tissue within a testosterone induced benign prostate hyperplasia rat model. Materials and Methods: 40 male Wistar rats were randomized into four Groups. Group-1: Control, Group-2: Testosterone replacement, Group-3: Testosterone+botulinum neurotoxin type A, Group-4: Testosterone+plazmid DNA/liposome complex. Results: Estimated prostate volume of the testosterone injected Groups were higher than the control (p &lt;0.05). Actual prostate weight of the testosterone injected Groups was higher than the control Group (p &lt;0.05). Testosterone undecanoate increased the prostate weight by 39%. Botulinum neurotoxin type A treatment led to an estimated prostate volume and actual prostate weights decreased up to 32.5% in rats leading to prostate apoptosis. Lysozyme gene treatment led to an estimated prostate volume and actual prostate weights decrease up to 38.7%. Conclusion: Lysozyme gene and botulinum neurotoxin type A treatments for prostate volume decreasing effect have been verified in the present study that could be anew modality of treatment in prostatic benign hyperplasia that needs to be verified in large randomized human experimental studies.
DOI: 10.6084/m9.figshare.5772087
title: Medical ozone therapy reduces oxidative stress and testicular damage in an experimental model of testicular torsion in rats

description: ABSTRACT Objective: Testicular torsion (TT) refers to rotation of the testis and twisting of the spermatic cord. TT results in ischemia-reperfusion (I/R) injury involving increased oxidative stress, inflammation and apoptosis, and can even lead to infertility. The aim of this study was to investigate the effect of ozone therapy on testicular damage due to I/R injury in an experimental torsion model. Materials and Methods: 24 male Sprague-Dawley rats were divided into 3 groups; shamoperated, torsion/detorsion (T/D), and T/D+ozone. Ozone (1mg/kg) was injected intraperitoneally 120 minutes before detorsion and for the following 24h. Blood and tissue samples were collected at the end of 24h. Johnsen score, ischemia modified albumin (IMA), total antioxidant status (TAS), total oxidant status (TOS), and oxidative stress index (OSI) levels were determined. Results: Levels of IMA, TOS, OSI, and histopathological scores increased in the serum/tissue of the rats in the experimental T/D group. Serum IMA, TOS, and OSI levels and tissue histopathological scores were lower in the rats treated with ozone compared with the T/D group. Conclusion: Our study results suggest that ozone therapy may exhibit beneficial effects on both biochemical and histopathological findings. Clinical trials are now necessary to confirm this.
DOI: 10.6084/m9.figshare.5772087.v1
title: Medical ozone therapy reduces oxidative stress and testicular damage in an experimental model of testicular torsion in rats

description: ABSTRACT Objective: Testicular torsion (TT) refers to rotation of the testis and twisting of the spermatic cord. TT results in ischemia-reperfusion (I/R) injury involving increased oxidative stress, inflammation and apoptosis, and can even lead to infertility. The aim of this study was to investigate the effect of ozone therapy on testicular damage due to I/R injury in an experimental torsion model. Materials and Methods: 24 male Sprague-Dawley rats were divided into 3 groups; shamoperated, torsion/detorsion (T/D), and T/D+ozone. Ozone (1mg/kg) was injected intraperitoneally 120 minutes before detorsion and for the following 24h. Blood and tissue samples were collected at the end of 24h. Johnsen score, ischemia modified albumin (IMA), total antioxidant status (TAS), total oxidant status (TOS), and oxidative stress index (OSI) levels were determined. Results: Levels of IMA, TOS, OSI, and histopathological scores increased in the serum/tissue of the rats in the experimental T/D group. Serum IMA, TOS, and OSI levels and tissue histopathological scores were lower in the rats treated with ozone compared with the T/D group. Conclusion: Our study results suggest that ozone therapy may exhibit beneficial effects on both biochemical and histopathological findings. Clinical trials are now necessary to confirm this.
DOI: 10.6084/m9.figshare.5772078
title: Evaluation of removal of chromium (III) by composite porous adsorbents materials of PE-g-MA, coconut fiber and chitosan using experimental design

description: ABSTRACT Adsorption processes can be employed in the treatment of wastewater containing heavy metals to reduce environmental damage. However, the high cost of adsorbent materials justifies the application of alternative adsorbents, such as coconut fiber (CF) and chitosan (C). Thus, this study aimed to develop porous composite adsorbents from the mixture of grafted maleic anhydride polyethylene/CF/C/NaCl, as porogen agent (PE-g-MA/CF/C/NaCl), and evaluate statistically adsorption capacity of chromium (III) solution, with the aid of software Statistica 5.0®. The results showed that the process efficiency was influenced by the size of the CF, the content of C and the pH of the solution containing Cr (III). The maximum removal capacity of Cr (III) per unit mass of the composite was 42.28 mg.g-1.
DOI: 10.6084/m9.figshare.5772078.v1
title: Evaluation of removal of chromium (III) by composite porous adsorbents materials of PE-g-MA, coconut fiber and chitosan using experimental design

description: ABSTRACT Adsorption processes can be employed in the treatment of wastewater containing heavy metals to reduce environmental damage. However, the high cost of adsorbent materials justifies the application of alternative adsorbents, such as coconut fiber (CF) and chitosan (C). Thus, this study aimed to develop porous composite adsorbents from the mixture of grafted maleic anhydride polyethylene/CF/C/NaCl, as porogen agent (PE-g-MA/CF/C/NaCl), and evaluate statistically adsorption capacity of chromium (III) solution, with the aid of software Statistica 5.0®. The results showed that the process efficiency was influenced by the size of the CF, the content of C and the pH of the solution containing Cr (III). The maximum removal capacity of Cr (III) per unit mass of the composite was 42.28 mg.g-1.
DOI: 10.6084/m9.figshare.5772069
title: Influence of nanoclay content on polypropylene properties and recycling of nanocomposites obtained by injection

description: ABSTRACT In this work, polypropylene and organophilic montmorillonite PP/MMTO nanocomposites were prepared at the concentrations of 1, 2, 5 and 7 % were prepared through the melt intercalation by directly at the single screw hydraulic injector. The obtained material was processed, obtaining specimens called ties in the form of ties. Reprocessing was performed by milling the material in a knife mill. Soon after the ground material was injected again obtaining the second cycle of the material and, later, until reaching the fourth cycle. The samples were evaluated by scanning electron microscopy (SEM), mechanical tensile test, thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The results of tensile strength and Young's modulus for the nanoclay containing formulations did not show significant changes, causing the nanoclay to act only as a charge. The TGA analysis showed that when 2% MMTO was added, the degradation temperature (Tonset) increased 17.10% when compared to PP, which was the best result found. The DSC curves did not show variation in the melt temperature (Tm2) for the formulations containing MMTO and also for the reprocessed formulations. On the other hand, the degree of crystallization (αc) showed significant variations, with emphasis on the formulation with 5% MMTO, where αc was 66.70%, about 26.80% higher than PP.
DOI: 10.6084/m9.figshare.5772069.v1
title: Influence of nanoclay content on polypropylene properties and recycling of nanocomposites obtained by injection

description: ABSTRACT In this work, polypropylene and organophilic montmorillonite PP/MMTO nanocomposites were prepared at the concentrations of 1, 2, 5 and 7 % were prepared through the melt intercalation by directly at the single screw hydraulic injector. The obtained material was processed, obtaining specimens called ties in the form of ties. Reprocessing was performed by milling the material in a knife mill. Soon after the ground material was injected again obtaining the second cycle of the material and, later, until reaching the fourth cycle. The samples were evaluated by scanning electron microscopy (SEM), mechanical tensile test, thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The results of tensile strength and Young's modulus for the nanoclay containing formulations did not show significant changes, causing the nanoclay to act only as a charge. The TGA analysis showed that when 2% MMTO was added, the degradation temperature (Tonset) increased 17.10% when compared to PP, which was the best result found. The DSC curves did not show variation in the melt temperature (Tm2) for the formulations containing MMTO and also for the reprocessed formulations. On the other hand, the degree of crystallization (αc) showed significant variations, with emphasis on the formulation with 5% MMTO, where αc was 66.70%, about 26.80% higher than PP.
DOI: 10.6084/m9.figshare.5772063
title: Study and characterization of epoxy resin composites in gel coat with different contents of inorganic fillers

description: ABSTRACT The gel coat epoxy resins used in mold lamination need to give the piece a high gloss and homogeneity, guaranteeing aesthetic quality and mechanical properties. In this way, the present work aimed to study the formulation of epoxy resin composites/inorganic fillers aiming at the improvement of physical and mechanical properties. A complete experimental design was carried out with three central points, totaling 11 formulations of epoxy gel coat composite, in which the influence of titanium dioxide (TiO2) (20, 45 and 70 phr), calcite (0, 20 and 40 phr) and barite (0, 20 and 40 phr) in the physical properties, density and drainage level and hardness. Considerable variations were observed in the properties of the composites with the modifications made in the formulations. It was verified in the experimental planning that the variable density was significant in relation to the three independent variables and not significant in the lack of fit, in this way, the model adequately represented the experimental behavior. For the variable hardness, the linear model did not satisfactorily describe the influence of the loads. According to the tests carried out, it was observed that with reduction of TiO2 characterized an increase in hardness, therefore, a reduction in density. On the other hand the baryta exerted a positive influence on the two properties and the calcite did not present significant influence. Regarding the level of runoff, the samples that presented the greatest amount of loads were the ones that performed best on this property. Finally, a new formulation was performed that was validated by the density model (60 parts TiO2, 30 parts calcite and 20 parts barite) that met the specifications.