cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.7451549.v1
title: Anatomical terminology of the internal nose and paranasal sinuses: cross-cultural adaptation to Portuguese

description: Abstract Introduction: Functional endonasal endoscopic surgery is a frequent surgical procedure among otorhinolaryngologists. In 2014, the European Society of Rhinology published the "European Position Paper on the Anatomical Terminology of the Internal Nose and Paranasal Sinuses", aiming to unify the terms in the English language. We do not yet have a unified terminology in the Portuguese language. Objective: Transcultural adaptation of the anatomical terms of the nose and paranasal cavities of the "European Anatomical Terminology of the Internal Nose and Paranasal Sinuses" to Portuguese. Methods: A group of rhinologists from diverse parts of Brazil, all experienced in endoscopic endonasal surgery, was invited to participate in the creation of this position paper on the anatomical terms of the nose and paranasal sinuses in the Portuguese language according to the methodology adapted from that previously described by Rudmik and Smith. Results: The results of this document were generated based on the agreement of the majority of the participants according to the most popular suggestions among the rhinologists. A cross-cultural adaptation of the sinonasal anatomical terminology was consolidated. We suggest the terms "inferior turbinate", "nasal septum", "(bone/cartilaginous) part of the nasal septum", "(middle/inferior) nasal meatus", "frontal sinus drainage pathway", "frontal recess" and "uncinate process" be standardized. Conclusion: We have consolidated a Portuguese version of the European Anatomical Terminology of the Internal Nose and Paranasal Sinuses, which will help in the publication of technical announcements, scientific publications and the teaching of the internal anatomical terms of the nose and paranasal sinuses in Brazil.
DOI: 10.6084/m9.figshare.7451534
title: Epidemiological study of snakebite cases in Brazilian Western Amazonia

description: Abstract INTRODUCTION Brazil has the largest number of snakebite cases in South America, of which the large majority is concentrated in the Midwest and North. METHODS In this descriptive observational study, we assessed the epidemiological and clinical snakebite cases referred to the Centro de Medicina Tropical de Rondônia from September 2008 to September 2010. RESULTS We followed up 92 cases from admission until discharge, namely 81 (88%) men and 11 (12%) women, with a mean age of 37 years, and mainly from rural areas (91.3%). The snakebites occurred while performing work activities (63%) during the Amazon rainy season (78.3%). The vast majority of individuals presented from the Porto Velho microregion (84.7%). Approximately 95.6% of the snakebites were caused by snakes of the genus Bothrops, followed by two lachetics and two elapidics cases. Surgery was performed in 10 cases (9 fasciotomies in the lower limb and 1 amputation). No deaths were reported in this study, but 4 cases (4.3%) developed sequelae in the lower limb. CONCLUSIONS This study can contribute to a better understanding of envenomation in the state of Rondônia and thus can be useful for identifying real conditions that can increase the incidence of snakebites in this region. Moreover, the study results can serve as a basis for improving educational campaigns designed to prevent these types of snakebites, as well as for preserving snakes.
DOI: 10.7284/103414
title: GNSS (Global Navigation Satellite System) data collected during research cruise MV1101 using a Ashtech ADU2 instrument system onboard the platform RV Melville

description: Original (unprocessed) data collected during a Field_expedition
DOI: 10.6084/m9.figshare.7451531
title: Evaluation of different formulations of SBR/NR elastomeric compounds in order to minimize pre-vulcanization

description: ABSTRACT This work aimed to develop and evaluate new formulations for the rubber vulcanization system based on styrene-butadiene rubber (SBR) and natural rubber (NR), aiming at reducing the formation of pre-vulcanized compounds by increasing storage time before processing. Alternative formulations have been developed in relation to a standard formulation employed by a company of the sector, varying the components of the vulcanization system (activators, agents and accelerators). The formulations were evaluated by rheology tests, tensile strength and elongation at break, hardness, permanent compression deformation (DPC), accelerated aging in greenhouse and absolute density. There were significant variations in the properties of the compounds with the modifications made in the vulcanization systems (S1, S2, S3, P1 and P2), when compared with the standard vulcanization system (S0), mainly when organic peroxides were used as agent of vulcanization. Of all the formulations evaluated, the one that used sulfur donor and a higher accelerator / sulfur ratio, compared to the standard vulcanization system showed all properties according to the technical specification required for the standard compound (S0) with reduction in the time of storage and minimization of pre-vulcanization.
DOI: 10.6084/m9.figshare.7451534.v1
title: Epidemiological study of snakebite cases in Brazilian Western Amazonia

description: Abstract INTRODUCTION Brazil has the largest number of snakebite cases in South America, of which the large majority is concentrated in the Midwest and North. METHODS In this descriptive observational study, we assessed the epidemiological and clinical snakebite cases referred to the Centro de Medicina Tropical de Rondônia from September 2008 to September 2010. RESULTS We followed up 92 cases from admission until discharge, namely 81 (88%) men and 11 (12%) women, with a mean age of 37 years, and mainly from rural areas (91.3%). The snakebites occurred while performing work activities (63%) during the Amazon rainy season (78.3%). The vast majority of individuals presented from the Porto Velho microregion (84.7%). Approximately 95.6% of the snakebites were caused by snakes of the genus Bothrops, followed by two lachetics and two elapidics cases. Surgery was performed in 10 cases (9 fasciotomies in the lower limb and 1 amputation). No deaths were reported in this study, but 4 cases (4.3%) developed sequelae in the lower limb. CONCLUSIONS This study can contribute to a better understanding of envenomation in the state of Rondônia and thus can be useful for identifying real conditions that can increase the incidence of snakebites in this region. Moreover, the study results can serve as a basis for improving educational campaigns designed to prevent these types of snakebites, as well as for preserving snakes.
DOI: 10.7284/103409
title: Gravimeter data collected during research cruise MV1101 using a Bell BGM-3 instrument system onboard the platform RV Melville

description: Original (unprocessed) data collected during a Field_expedition
DOI: 10.6084/m9.figshare.7451528
title: Development and Characterization of Polyhydroxybutyrate and Banana Fiber biocomposites

description: ABSTRACT PHB (Poly-3-hydroxybutyrate) is a biodegradable thermoplastic polymer synthesized by fermentation from renewable materials. It is a polyester composed of elastomers and linear thermoplastics, whose properties are of great scientific and technological interest, is a very rigid and fragile polymer and highly crystalline with barrier properties and chemical resistance to hydrolysis. PHB has industrial processing restricted due to its physical properties. Studies have shown that the use of natural fibers as reinforcement has been an alternative for reducing the cost of production and improving the thermal and mechanical properties of polymeric materials. The banana fiber has been studied as a polymeric reinforcement, and can become a promising alternative, for being highly available, low density, low abrasiveness, non-toxic, and be renewable and biodegradable. The objective of this work was the study of the mechanical properties (tensile strength), thermal properties (thermogravimetric analysis, TGA, and Differential Exploratory Calorimetry, DSC), morphological and fluidity Index of PHB and PHB/banana fiber composites. The fibers were chemically treated to change the contact surface. PHB/FB composites with concentrations of 90/05 and 90/10 (m/m) were prepared. The materials were processed by extrusion and molded in a hydraulic press to make the specimens. The incorporation of the fiber caused a change in the mechanical results of the material. The best results were achieved with the 90/05 (m/m).
DOI: 10.6084/m9.figshare.7451531.v1
title: Evaluation of different formulations of SBR/NR elastomeric compounds in order to minimize pre-vulcanization

description: ABSTRACT This work aimed to develop and evaluate new formulations for the rubber vulcanization system based on styrene-butadiene rubber (SBR) and natural rubber (NR), aiming at reducing the formation of pre-vulcanized compounds by increasing storage time before processing. Alternative formulations have been developed in relation to a standard formulation employed by a company of the sector, varying the components of the vulcanization system (activators, agents and accelerators). The formulations were evaluated by rheology tests, tensile strength and elongation at break, hardness, permanent compression deformation (DPC), accelerated aging in greenhouse and absolute density. There were significant variations in the properties of the compounds with the modifications made in the vulcanization systems (S1, S2, S3, P1 and P2), when compared with the standard vulcanization system (S0), mainly when organic peroxides were used as agent of vulcanization. Of all the formulations evaluated, the one that used sulfur donor and a higher accelerator / sulfur ratio, compared to the standard vulcanization system showed all properties according to the technical specification required for the standard compound (S0) with reduction in the time of storage and minimization of pre-vulcanization.
DOI: 10.6084/m9.figshare.7451522
title: Effect of the reactional variables on the synthesis of a functionalized biodegradable polymer: PCL-g-MA

description: ABSTRACT Poly (ɛ-caprolactone) (PCL) is a biodegradable synthetic thermoplastic that has been the focus of studies on new "green polymers", due mainly to its good mechanical properties, which makes it competitive among other conventional polymers and biopolymers, such as, Poly(lactic acid) (PLA) and Poly(hydroxybutyrene) (PHB). The objective of this work was the grafting of maleic anhydride (MA) reactive groups in PCL for the production of a functional biodegradable polymer. The grafting synthesis of the maleic anhydride in the PCL occurred in an internal lab mixer, using concentrations of 2.5 and 5.0% MA and 0.3 and 0.5% of the dicumyl peroxide initiator (DCP) at two temperatures of process, 110°C and 160°C. The methodology of factorial planning 23 was used to optimize the experiments, as well as to evaluate the efficiency of the reaction conditions employed for PCL functionalization. The results indicated that maleic anhydride was grafted onto PCL using the dicumyl peroxide initiator. The percentage of graphitized maleic anhydride (% gMA) was obtained by titration and confirmed by Fourier Transform Infra-Red (FTIR). Through the obtained results it can be inferred that higher content (5.0%) of MA positively favored the grafting. However, over certain amount, a saturation of the system may occur and the tendency is for recombination.
DOI: 10.6084/m9.figshare.7451528.v1
title: Development and Characterization of Polyhydroxybutyrate and Banana Fiber biocomposites

description: ABSTRACT PHB (Poly-3-hydroxybutyrate) is a biodegradable thermoplastic polymer synthesized by fermentation from renewable materials. It is a polyester composed of elastomers and linear thermoplastics, whose properties are of great scientific and technological interest, is a very rigid and fragile polymer and highly crystalline with barrier properties and chemical resistance to hydrolysis. PHB has industrial processing restricted due to its physical properties. Studies have shown that the use of natural fibers as reinforcement has been an alternative for reducing the cost of production and improving the thermal and mechanical properties of polymeric materials. The banana fiber has been studied as a polymeric reinforcement, and can become a promising alternative, for being highly available, low density, low abrasiveness, non-toxic, and be renewable and biodegradable. The objective of this work was the study of the mechanical properties (tensile strength), thermal properties (thermogravimetric analysis, TGA, and Differential Exploratory Calorimetry, DSC), morphological and fluidity Index of PHB and PHB/banana fiber composites. The fibers were chemically treated to change the contact surface. PHB/FB composites with concentrations of 90/05 and 90/10 (m/m) were prepared. The materials were processed by extrusion and molded in a hydraulic press to make the specimens. The incorporation of the fiber caused a change in the mechanical results of the material. The best results were achieved with the 90/05 (m/m).
DOI: 10.7284/103410
title: Gravimeter data collected during research cruise MV1101 using a Bell BGM-3 instrument system onboard the platform RV Melville

description: Original (unprocessed) data collected during a Field_expedition
DOI: 10.6084/m9.figshare.7451519
title: Modification of the diameter of microcapsules of poly (urea-formaldehyde) using octanol

description: ABSTRACT In self-healing polymers, capsules filled with healing agents are used, whose walls rupture as a response to external stimulation, releasing and sealing the cracks in the materials. Thus, this work had as objective to evaluate the possible changes in the morphology and diameter of microcapsules (MC) of poly(urea-formaldehyde) (PUF) by variation of the octanol concentration used in the synthesis. Through the measurements with optical microscopy (OM) and scanning electron microscopy with field effect (FEGSEM), it was verified that the MC diameter and the wall roughness associated with the formation of nanocapsules in the emulsion increased as the amount of octanol added in the synthesis increased. Thermal analysis showed that the microcapsules synthesized this way are more thermally stable compared to those reported in the literature. It was concluded that the use of octanol contributes to obtaining MCs with a more uniform size and smoother surface.
DOI: 10.6084/m9.figshare.7451522.v1
title: Effect of the reactional variables on the synthesis of a functionalized biodegradable polymer: PCL-g-MA

description: ABSTRACT Poly (ɛ-caprolactone) (PCL) is a biodegradable synthetic thermoplastic that has been the focus of studies on new "green polymers", due mainly to its good mechanical properties, which makes it competitive among other conventional polymers and biopolymers, such as, Poly(lactic acid) (PLA) and Poly(hydroxybutyrene) (PHB). The objective of this work was the grafting of maleic anhydride (MA) reactive groups in PCL for the production of a functional biodegradable polymer. The grafting synthesis of the maleic anhydride in the PCL occurred in an internal lab mixer, using concentrations of 2.5 and 5.0% MA and 0.3 and 0.5% of the dicumyl peroxide initiator (DCP) at two temperatures of process, 110°C and 160°C. The methodology of factorial planning 23 was used to optimize the experiments, as well as to evaluate the efficiency of the reaction conditions employed for PCL functionalization. The results indicated that maleic anhydride was grafted onto PCL using the dicumyl peroxide initiator. The percentage of graphitized maleic anhydride (% gMA) was obtained by titration and confirmed by Fourier Transform Infra-Red (FTIR). Through the obtained results it can be inferred that higher content (5.0%) of MA positively favored the grafting. However, over certain amount, a saturation of the system may occur and the tendency is for recombination.
DOI: 10.6084/m9.figshare.7451516
title: Consistency analysis of mechanical properties of elements produced by FDM additive manufacturing technology

description: ABSTRACT Additive manufacturing (AM) technology refers to the process of producing 3D objects by adding material in successive layers. Fused deposition modeling (FDM) is one of the AM technologies where objects are built by adding layers of melted thermoplastic filament onto the printing surface. Mechanical properties of FDM printed part depend on many influencing factors such as material composition, extruding temperature, printing parameters and environment temperature.
DOI: 10.6084/m9.figshare.7451519.v1
title: Modification of the diameter of microcapsules of poly (urea-formaldehyde) using octanol

description: ABSTRACT In self-healing polymers, capsules filled with healing agents are used, whose walls rupture as a response to external stimulation, releasing and sealing the cracks in the materials. Thus, this work had as objective to evaluate the possible changes in the morphology and diameter of microcapsules (MC) of poly(urea-formaldehyde) (PUF) by variation of the octanol concentration used in the synthesis. Through the measurements with optical microscopy (OM) and scanning electron microscopy with field effect (FEGSEM), it was verified that the MC diameter and the wall roughness associated with the formation of nanocapsules in the emulsion increased as the amount of octanol added in the synthesis increased. Thermal analysis showed that the microcapsules synthesized this way are more thermally stable compared to those reported in the literature. It was concluded that the use of octanol contributes to obtaining MCs with a more uniform size and smoother surface.
DOI: 10.6084/m9.figshare.7451510
title: PCL/ZnO Bio-friendly Films as Food Packaging Material.Thermal and morphological analysis

description: ABSTRACT Films of Poly(?-caprolactone) (PCL) and PCL/Zinc Oxide (ZnO) were obtained by solution processing. Thermal behaviour and morphological structure were analysed by means of Thermogravimetry (TGA), Differential Scanning Calorimetry (DSC), Optical Microscopy (OM) and Scanning Electron Microscopy (SEM). The addition of ZnO to PCL decreased the degradation temperature about 50-70°C; the films are thermally stable up to 200°C, making them suitable for packaging hot grilled chicken. ZnO did not promote significant alterations of the PCL fusion and melt crystallization, however the crystallinity increased; probably ZnO acts as nucleating agent during PCL crystallization as OM images showed greater amount of small spherulites on PCL/ZnO films. According to SEM, the methodology utilized is adequate for producing films in concentrations up to 5% ZnO.
DOI: 10.6084/m9.figshare.7451513
title: Carbon xerogel/TiO2 composites

description: ABSTRACT Carbon xerogels (CXs) are materials with three-dimensional structure of nano-sized balls and interconnected pores. CX have been widely applied as metal support for use in catalysis. The main advantage of these materials is that their physical and chemical properties can be adapted for each catalytic requirements. In this work, CX/TiO2 compounds have been synthesized in a single step, which consisted in the polymerization sol-gel/condensation of resorcinol and formaldehyde solution, with simultaneous addition of TiO2 nanoparticles or Ti(IV), followed by drying and heat treatment. The composites were characterized by thermogravimetric analysis (TG), X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy and adsorption isotherms of nitrogen (N2) to determination of surface area (BET) and pore volume (VP). The results showed the presence of a mixture of anatase and rutile phases in the composites. Although SEM images it was verified higher uniformity in the distribution of TiO2 particles in CX support. The photocatalytic properties were investigated for the degradation of methylene blue (AM). The kinetics of the photocatalytic process was determined as the pseudo first-order model. There was a synergistic effect between the solids, with an increase of photocatalytic activity in composite CX/TiO2, compared to TiO2.
DOI: 10.7284/103411
title: Multibeam Echosounder data collected during research cruise MV1101 using a Kongsberg EM122 instrument system onboard the platform RV Melville

description: Original (unprocessed) data collected during a Field_expedition
DOI: 10.6084/m9.figshare.7451510.v1
title: PCL/ZnO Bio-friendly Films as Food Packaging Material.Thermal and morphological analysis

description: ABSTRACT Films of Poly(?-caprolactone) (PCL) and PCL/Zinc Oxide (ZnO) were obtained by solution processing. Thermal behaviour and morphological structure were analysed by means of Thermogravimetry (TGA), Differential Scanning Calorimetry (DSC), Optical Microscopy (OM) and Scanning Electron Microscopy (SEM). The addition of ZnO to PCL decreased the degradation temperature about 50-70°C; the films are thermally stable up to 200°C, making them suitable for packaging hot grilled chicken. ZnO did not promote significant alterations of the PCL fusion and melt crystallization, however the crystallinity increased; probably ZnO acts as nucleating agent during PCL crystallization as OM images showed greater amount of small spherulites on PCL/ZnO films. According to SEM, the methodology utilized is adequate for producing films in concentrations up to 5% ZnO.
DOI: 10.6084/m9.figshare.7451513.v1
title: Carbon xerogel/TiO2 composites

description: ABSTRACT Carbon xerogels (CXs) are materials with three-dimensional structure of nano-sized balls and interconnected pores. CX have been widely applied as metal support for use in catalysis. The main advantage of these materials is that their physical and chemical properties can be adapted for each catalytic requirements. In this work, CX/TiO2 compounds have been synthesized in a single step, which consisted in the polymerization sol-gel/condensation of resorcinol and formaldehyde solution, with simultaneous addition of TiO2 nanoparticles or Ti(IV), followed by drying and heat treatment. The composites were characterized by thermogravimetric analysis (TG), X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy and adsorption isotherms of nitrogen (N2) to determination of surface area (BET) and pore volume (VP). The results showed the presence of a mixture of anatase and rutile phases in the composites. Although SEM images it was verified higher uniformity in the distribution of TiO2 particles in CX support. The photocatalytic properties were investigated for the degradation of methylene blue (AM). The kinetics of the photocatalytic process was determined as the pseudo first-order model. There was a synergistic effect between the solids, with an increase of photocatalytic activity in composite CX/TiO2, compared to TiO2.
DOI: 10.6084/m9.figshare.7451501
title: Weibull analysis of tensile tested piassava fibers with different diameters

description: ABSTRACT Environmental considerations in addition to technical, economical and societal benefits are increasingly promoting the substitution of natural fibers for glass fiber in polymer matrix composites. However, natural fibers are heterogeneous in their dimensions, specially the cross section, which plays an important role in their mechanical strength. It has been found that the equivalent diameter of fibers such as sisal, ramie, pineapple and curaua correlates to different levels of tensile resistance. Piassava is a promising stiff natural fiber for composite reinforcement. In this work, a statistical analysis of tensile strength of piassava fibers using the Weibull methodology was performed. An attempt to correlate the fiber strength, obtained in tensile tests, with the diameter, precisely measured by means of a profile projector, was carried out. The results revealed an inverse dependence between the piassava fiber diameter and corresponding tensile strength. Fracture tip observation by SEM suggested a possible mechanism that could justify this inverse correlation.