cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.11350721
title: Falls in persons with Parkinson's disease: Do non-motor symptoms matter as much as motor symptoms?

description: ABSTRACT Falls are common among persons with Parkinson's disease (PD). On the other hand, predicting falls is complex as there are both generic and PD-specific contributors. In particular, the role of non-motor symptoms has been less studied. Objective: The objective of this study was to identify the role of non-motor predictors of falling in persons with PD (PwP). Methods: A cross-sectional study was carried out in PwP recruited from a movement disorders clinic. Clinical and demographical data were collected. All PwP were assessed using the Movement Disorders Society Unified Parkinson's Disease Rating Scale (MDS-UPDRS) and the Non-Motor Symptoms Scale (NMSS). Variables were assessed at the bivariate level. Significant variables were put into a logistic regression model. Results: A total of 179 PwP were included. Overall, 16.8% of PwP had fallen in the past 12 months, with 53.3% of them being recurrent fallers. The mean number of monthly falls was 2.5 ± 3.3. Factors associated with falling in the bivariate analysis included the disease duration, Hoehn and Yahr stage, MDS-UPDRS part I and II, postural instability/gait disturbance (PIGD) subtype, NMSS urinary domain, NMSS miscellaneous domain, and non-motor severity burden (all p-values &lt; 0.05). After multivariate analysis, only the disease duration (p = 0.03) and PIGD (p = 0.03) remained as independent risk factors. Conclusion: Disease duration and the PIGD subtype were identified as relevant risk factors for falls in PwP Non-motor symptoms appear to have a less important role as risk factors for falls.
DOI: 10.6084/m9.figshare.11350730.v1
title: Structure and Properties of Dual-doped PEDOT:PSS Multilayer Films

description: Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is the most successful transparent conductive polymer widely used in functional organic devices. However, its potential in fabrication of highly conductive electrodes still has not been fully explored. This paper is an attempt to fill the existing gap of knowledge on possible post-treatments of dimethyl sulfoxide (DMSO)-doped PEDOT:PSS thin films. In the present study, surface morphology, optical and electrical properties of untreated and sulfuric acid treated DMSO-doped PEDOT:PSS multilayers on the glass coverslip substrates are examined. It is demonstrated that short-time sulfuric acid treatment enhances electrical and optical properties, and smoothens surface of the transparent conductive films. Enhancement of electrical conductivity by more than 30 % can be associated with increase in doping level, removal of excess PSS and accompanied shape alterations of the conjugated PEDOT chains. Acid treatment also results in smoother transmittance spectra and a slight improvement of optical transparency. Hence, sulfuric acid post-treatment can be considered as a simple and inexpensive technique for the complementary doping of DMSO-doped PEDOT:PSS films with the aim to develop the more effective transparent electrodes.
DOI: 10.6084/m9.figshare.11350715
title: Evaluation of Aqueous Coffee Husks Extracts as a Corrosion Inhibitor of 1020 Carbon Steel in 1 mol L-1 HCl Solution

description: Corrosive processes in acidic medium reduce the performance and durability of metallic materials, causing problems to several industries. Corrosion inhibitors are commonly used to decrease these effects. As these inhibitors must be ecologically friendly currently, this work evaluated the anticorrosive effect of natural extracts of coffee husks (Coffea arabica L.) in the protection of carbon steel in 1 mol L-1 HCl solution. Extractions were performed using water as the extraction solvent. The polyphenols content increased with the extraction temperature, and the extracts were produced using 100 ºC. Extract concentrations of 10, 20 and 30 % v/v were analyzed as inhibitors for carbon steel in acid medium, using weight loss and electrochemical tests, as well as scanning electron microscopy. There was an increase in the inhibition efficiency as the extract concentration increased, reaching values around 97 % using 30 %v/v of extract for the weight loss tests.
DOI: 10.6084/m9.figshare.11350718
title: Printing 3D models of canine jaw fractures for teaching undergraduate veterinary medicine

description: Abstract Purpose To develop 3D anatomical models, and corresponding radiographs, of canine jaw fractures. Methods A base model was generated from a mandibular bone scan. With this model it was possible to perform fracture planning according to the anatomical location. Results The 3D base model of the canine mandible was similar in conformation to the natural bone, demonstrating structures such as canine tooth crowns, premolars and molars, mental foramina, body of the mandible, ramus of the mandible, masseteric fossa, the coronoid process, condylar process, and angular process. It was not possible to obtain detail of the crown of the incisor teeth, mandibular symphysis, and the medullary channel. Production of the 3D CJF model took 10.6 h, used 150.1 g of filament (ABS) and cost US$5.83. Conclusion The 3D canine jaw fractures models, which reproduced natural canine jaw fractures, and their respective radiographic images, are a possible source of educational material for the teaching of veterinary medicine.
DOI: 10.6084/m9.figshare.11350709
title: Vascular access cannulation in hemodialysis patients: technical approach

description: ABSTRACT Introduction: The vascular access cannulation technique varies among clinics, and guidelines on vascular access give little importance to cannulation techniques. The objective of this study was to evaluate the cannulation technique and to determine which factors are associated with each detail of the technique. Material and methods: The vascular access cannulation was evaluated in 260 patients undergoing hemodialysis. The type and anatomical location of the vascular access, the cannulation technique, direction, gauge, and distance between needles, besides bevel direction and needle rotation were registered. Results: The arteriovenous fistula was the most frequent vascular access (88%), the most used cannulation technique was area (100%), the needle direction was anterograde in most cases (79.5%), and the mean distance between the tips of needles was 7.57±4.43 cm. For arteriovenous grafts, the proximal anatomical location (brachial artery) and cannulation with 16G needles in anterograde position were more predominant. For arteriovenous fistulas, the distal anatomical location (radial artery) and cannulation through 15G needles were more common. Cannulation of vascular access in retrograde direction was associated with a greater distance between needles (13.2 ± 4.4 vs 6.1 ± 3 cm, p &lt; 0.001). Kt/V was higher when the distance between needles was higher than 5 cm (1.61 ± 0.3 vs. 1.47 ± 0.28, p &lt; 0.01). Conclusions: The vascular access cannulation technique depends on the vascular access characteristics and expertise of cannulators. Clinical trials are required for the formulation of guidelines for vascular access cannulation.
DOI: 10.6084/m9.figshare.11350712
title: Development of a method for simultaneous analysis of caffeine and taurine in energy drinks by micellar electrokinetic chromatography with diode-array detector

description: Abstract The objective of this study was to develop, optimize and validate a fast and reliable method for the simultaneous determination of caffeine and taurine contents by micellar electrokinetic chromatography with diode array detector, using direct and indirect detection concomitantly. Multivariate statistical techniques were used as a central composite design and the simultaneous optimization method of responses of Derringer and Suich were used for optimization. The method was applied in the analysis of 73 samples of energy drinks commercialized in Brazil. The optimized method employed a capillary tube with an extended bulb of 50 µm i.d. x 72 cm total length, an electrolyte containing 16.20 mmol.L-1 of benzoic acid and 39.90 mmol.L-1 of SDS, a pH value of 7.26, + 30 kV voltage, direct detection of caffeine at 274 nm and indirect detection of taurine at 230 nm. Validation parameters have demonstrated the reliability and applicability of this method. It was found that more than 50% of the samples were out of the legal limits determined by the Brazilian government regarding the taurine content and 68 % contained caffeine below the value declared on the label. Therefore, the need for greater control concerning the composition of these drinks exists.
DOI: 10.6084/m9.figshare.11350715.v1
title: Evaluation of Aqueous Coffee Husks Extracts as a Corrosion Inhibitor of 1020 Carbon Steel in 1 mol L-1 HCl Solution

description: Corrosive processes in acidic medium reduce the performance and durability of metallic materials, causing problems to several industries. Corrosion inhibitors are commonly used to decrease these effects. As these inhibitors must be ecologically friendly currently, this work evaluated the anticorrosive effect of natural extracts of coffee husks (Coffea arabica L.) in the protection of carbon steel in 1 mol L-1 HCl solution. Extractions were performed using water as the extraction solvent. The polyphenols content increased with the extraction temperature, and the extracts were produced using 100 ºC. Extract concentrations of 10, 20 and 30 % v/v were analyzed as inhibitors for carbon steel in acid medium, using weight loss and electrochemical tests, as well as scanning electron microscopy. There was an increase in the inhibition efficiency as the extract concentration increased, reaching values around 97 % using 30 %v/v of extract for the weight loss tests.
DOI: 10.6084/m9.figshare.11350721.v1
title: Falls in persons with Parkinson's disease: Do non-motor symptoms matter as much as motor symptoms?

description: ABSTRACT Falls are common among persons with Parkinson's disease (PD). On the other hand, predicting falls is complex as there are both generic and PD-specific contributors. In particular, the role of non-motor symptoms has been less studied. Objective: The objective of this study was to identify the role of non-motor predictors of falling in persons with PD (PwP). Methods: A cross-sectional study was carried out in PwP recruited from a movement disorders clinic. Clinical and demographical data were collected. All PwP were assessed using the Movement Disorders Society Unified Parkinson's Disease Rating Scale (MDS-UPDRS) and the Non-Motor Symptoms Scale (NMSS). Variables were assessed at the bivariate level. Significant variables were put into a logistic regression model. Results: A total of 179 PwP were included. Overall, 16.8% of PwP had fallen in the past 12 months, with 53.3% of them being recurrent fallers. The mean number of monthly falls was 2.5 ± 3.3. Factors associated with falling in the bivariate analysis included the disease duration, Hoehn and Yahr stage, MDS-UPDRS part I and II, postural instability/gait disturbance (PIGD) subtype, NMSS urinary domain, NMSS miscellaneous domain, and non-motor severity burden (all p-values &lt; 0.05). After multivariate analysis, only the disease duration (p = 0.03) and PIGD (p = 0.03) remained as independent risk factors. Conclusion: Disease duration and the PIGD subtype were identified as relevant risk factors for falls in PwP Non-motor symptoms appear to have a less important role as risk factors for falls.
DOI: 10.6084/m9.figshare.11350706
title: Elderly caregiver: knowledge, attitudes and practices about falls and its prevention

description: ABSTRACT Objective: investigate the knowledge, attitudes and practices of informal elderly caregivers about falls and its prevention. Method: this is a descriptive cross-sectional study conducted with 97 informal elderly caregivers residents in areas covered by five Health Strategy Units (ESF) in Cuiabá. Results: more than half of the participants are aware of falls and identify them as a problem, as well as they identify some risk factors and prevention measures. Regarding attitudes, more than half of the caregivers do not seem to act effectively to prevent falls. Most of them report adopting practices to prevent falls of the elderly, supervising the activities of their daily lives. Conclusion: caregivers know about falls and its prevention, but in a superficial way, and it seems to influence their attitudes and practices regarding the prevention of this event.
DOI: 10.6084/m9.figshare.11350709.v1
title: Vascular access cannulation in hemodialysis patients: technical approach

description: ABSTRACT Introduction: The vascular access cannulation technique varies among clinics, and guidelines on vascular access give little importance to cannulation techniques. The objective of this study was to evaluate the cannulation technique and to determine which factors are associated with each detail of the technique. Material and methods: The vascular access cannulation was evaluated in 260 patients undergoing hemodialysis. The type and anatomical location of the vascular access, the cannulation technique, direction, gauge, and distance between needles, besides bevel direction and needle rotation were registered. Results: The arteriovenous fistula was the most frequent vascular access (88%), the most used cannulation technique was area (100%), the needle direction was anterograde in most cases (79.5%), and the mean distance between the tips of needles was 7.57±4.43 cm. For arteriovenous grafts, the proximal anatomical location (brachial artery) and cannulation with 16G needles in anterograde position were more predominant. For arteriovenous fistulas, the distal anatomical location (radial artery) and cannulation through 15G needles were more common. Cannulation of vascular access in retrograde direction was associated with a greater distance between needles (13.2 ± 4.4 vs 6.1 ± 3 cm, p &lt; 0.001). Kt/V was higher when the distance between needles was higher than 5 cm (1.61 ± 0.3 vs. 1.47 ± 0.28, p &lt; 0.01). Conclusions: The vascular access cannulation technique depends on the vascular access characteristics and expertise of cannulators. Clinical trials are required for the formulation of guidelines for vascular access cannulation.
DOI: 10.6084/m9.figshare.11350712.v1
title: Development of a method for simultaneous analysis of caffeine and taurine in energy drinks by micellar electrokinetic chromatography with diode-array detector

description: Abstract The objective of this study was to develop, optimize and validate a fast and reliable method for the simultaneous determination of caffeine and taurine contents by micellar electrokinetic chromatography with diode array detector, using direct and indirect detection concomitantly. Multivariate statistical techniques were used as a central composite design and the simultaneous optimization method of responses of Derringer and Suich were used for optimization. The method was applied in the analysis of 73 samples of energy drinks commercialized in Brazil. The optimized method employed a capillary tube with an extended bulb of 50 µm i.d. x 72 cm total length, an electrolyte containing 16.20 mmol.L-1 of benzoic acid and 39.90 mmol.L-1 of SDS, a pH value of 7.26, + 30 kV voltage, direct detection of caffeine at 274 nm and indirect detection of taurine at 230 nm. Validation parameters have demonstrated the reliability and applicability of this method. It was found that more than 50% of the samples were out of the legal limits determined by the Brazilian government regarding the taurine content and 68 % contained caffeine below the value declared on the label. Therefore, the need for greater control concerning the composition of these drinks exists.
DOI: 10.6084/m9.figshare.11350718.v1
title: Printing 3D models of canine jaw fractures for teaching undergraduate veterinary medicine

description: Abstract Purpose To develop 3D anatomical models, and corresponding radiographs, of canine jaw fractures. Methods A base model was generated from a mandibular bone scan. With this model it was possible to perform fracture planning according to the anatomical location. Results The 3D base model of the canine mandible was similar in conformation to the natural bone, demonstrating structures such as canine tooth crowns, premolars and molars, mental foramina, body of the mandible, ramus of the mandible, masseteric fossa, the coronoid process, condylar process, and angular process. It was not possible to obtain detail of the crown of the incisor teeth, mandibular symphysis, and the medullary channel. Production of the 3D CJF model took 10.6 h, used 150.1 g of filament (ABS) and cost US$5.83. Conclusion The 3D canine jaw fractures models, which reproduced natural canine jaw fractures, and their respective radiographic images, are a possible source of educational material for the teaching of veterinary medicine.
DOI: 10.6084/m9.figshare.11350694
title: Evaluation of Basic Education teachers’ graphic literacy at training and profesional action

description: ABSTRACT This article presents the results of a cross-sectional descriptive research carried out in a university in south central Chile, in which teachers of Basic Education in training and in active participation, on graphic representations, due to the role they play in the teaching and learning process from the first year of Basic Education in the Chilean school curriculum. For the collection of information, an instrument validated statistically by the authors was applied, which showed a reliability (Cronbach's alpha) of 0.78, which allowed to evaluate the coding and decoding abilities of quantitative information summarized in univariate and bivariate graphical representations, making use of Kimura's taxonomy (1999), whose introduction at the school system level would generate the skills demanded by the national curriculum. The results show that, in general, teachers in training and active have high average percentages in the basic reading ability of univariate information, summarized in polygons of simple frequency. However, the percentages decrease to 61.3% in the future professors and to 50% in the professors in active, because it is a histogram, representation widely used to show the distribution of quantitative information in any course of statistics at national and international level. These results, novelty in the Chilean context, allow us to observe that the teachers in training and in active have not sufficiently developed the ability to make a joint reading of two quantitative variables summarized by means of a graphic representation, demanding innovation in the processes of instruction that guarantee an improvement in learning.
DOI: 10.6084/m9.figshare.11350697
title: Land-use influence on the soil hydrology: An approach in upper Grande River basin, Southeast Brazil

description: ABSTRACT Brazil is a large country that depends on the hydroelectricity generation hydropower dams. The Upper Grande River Basin (UGRB) is one of the most important Brazilian hydrological regions in terms of water availability and electric energy production. Therefore, studies of water availability are indispensable for a better and more successful decision making in water resources management in the region. This study objective to approach the land-use influence on the soil hydrology in the Upper Grande River Basin, a strategic headwater basin of southeastern Brazil. This study uses hydrological indicators (baseflow/runoff (BF/R) and overland flow/runoff (OF/R)) extracted from eight watersheds, varying the size and localization in the region, to support the results found. Soil saturated hydraulic conductivity (Ko) was determined in situ using a constant flow permeameter, totaling 224 sampled points. Five machine learning algorithms were compared in their performance to predict Ko (Random Forest, Support Vector Machine, Gradient Boosting, Linear Regression, Regularization) using terrain attributes as covariates. The tested methods for predicting Ko resulted in a relatively low coefficient of determination (R2) due to the high spatial variability of this soil hydrologic attribute. The hydrological indicator BF/R was sensitive to land-use changes in the watersheds. The greatest Ko values were associated with native forest and the least values area associated with pasture and rupestrian field.
DOI: 10.6084/m9.figshare.11350706.v1
title: Elderly caregiver: knowledge, attitudes and practices about falls and its prevention

description: ABSTRACT Objective: investigate the knowledge, attitudes and practices of informal elderly caregivers about falls and its prevention. Method: this is a descriptive cross-sectional study conducted with 97 informal elderly caregivers residents in areas covered by five Health Strategy Units (ESF) in Cuiabá. Results: more than half of the participants are aware of falls and identify them as a problem, as well as they identify some risk factors and prevention measures. Regarding attitudes, more than half of the caregivers do not seem to act effectively to prevent falls. Most of them report adopting practices to prevent falls of the elderly, supervising the activities of their daily lives. Conclusion: caregivers know about falls and its prevention, but in a superficial way, and it seems to influence their attitudes and practices regarding the prevention of this event.
DOI: 10.6084/m9.figshare.11350691
title: Family farmers commercialization in farmers' markets: quantification, participation, and location in the state of Goiás

description: Abstract: This study aims to identify the importance of farmers' markets for family farmers. The survey carried out in 201 municipalities of the Brazilian state of Goiás reveals that 88% of the studied municipalities have regular farmers' markets. 67.16% of these markets have effective participation of family farmers. Clusters of municipalities with greater presence of farmers' markets were identified.
DOI: 10.6084/m9.figshare.11350694.v1
title: Evaluation of Basic Education teachers’ graphic literacy at training and profesional action

description: ABSTRACT This article presents the results of a cross-sectional descriptive research carried out in a university in south central Chile, in which teachers of Basic Education in training and in active participation, on graphic representations, due to the role they play in the teaching and learning process from the first year of Basic Education in the Chilean school curriculum. For the collection of information, an instrument validated statistically by the authors was applied, which showed a reliability (Cronbach's alpha) of 0.78, which allowed to evaluate the coding and decoding abilities of quantitative information summarized in univariate and bivariate graphical representations, making use of Kimura's taxonomy (1999), whose introduction at the school system level would generate the skills demanded by the national curriculum. The results show that, in general, teachers in training and active have high average percentages in the basic reading ability of univariate information, summarized in polygons of simple frequency. However, the percentages decrease to 61.3% in the future professors and to 50% in the professors in active, because it is a histogram, representation widely used to show the distribution of quantitative information in any course of statistics at national and international level. These results, novelty in the Chilean context, allow us to observe that the teachers in training and in active have not sufficiently developed the ability to make a joint reading of two quantitative variables summarized by means of a graphic representation, demanding innovation in the processes of instruction that guarantee an improvement in learning.