cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.7243925.v1
title: IMMOBILIZATION OF HORSERADISH PEROXIDASE ON SUGARCANE BAGASSE

description: The immobilization of horseradish peroxidase (HRP) on raw and alkaline pre-treated sugarcane bagasse by physical adsorption (ADS) and covalent bond (LC) methods was studied. The saturation of the support with 2 mg of HRP/g of support by LC immobilization reached 35% of immobilization efficiency and 39 units of the immobilized enzyme (U). Regarding the HRP immobilization on sugarcane bagasse without pretreatment and using the same HRP loading, it was observed a reduction in the efficiency of immobilization and in the number of immobilized units for both methods, ADS (13.98% and 15.46 U) and LC (15.79% and 17.46 U). The sugarcane bagasse with alkaline pretreatment experiment, on the other hand, exhibited higher potential for HRP immobilization by LC. The supports and biocatalysts were characterized by Fourier transform infrared spectroscopy (FTIR), showing greater availability of hydroxyl groups in the pretreated support and the typical amide I and amide II bands that corroborate the effectiveness of the enzyme immobilization on sugarcane bagasse. In the same way, the thermogravimetric analysis (TGA) confirmed a higher weight loss in the region I for the derivative immobilized by LC, suggesting the presence of water favored enzymatic activity.
DOI: 10.6084/m9.figshare.7243916
title: Pulmonary inhalation-perfusion scintigraphy in the evaluation of bronchoscopic treatment of bronchopleural fistula

description: Abstract Objective: To evaluate the use of pulmonary inhalation-perfusion scintigraphy as an alternative method of investigation and follow-up in patients with bronchopleural fistula (BPF). Materials and Methods: Nine patients with BPFs were treated through the off-label use of a transcatheter atrial septal defect occluder, placed endoscopically, and were followed with pulmonary inhalation-perfusion scintigraphy, involving inhalation, via a nebulizer, of 900-1300 MBq (25-35 mCi) of technetium-99m-labeled diethylenetriaminepentaacetic acid and single-photon emission computed tomography with a dual-head gamma camera. Results: In two cases, there was a residual air leak that was not identified by bronchoscopy or the methylene blue test but was detected only by pulmonary inhalation-perfusion scintigraphy. Those results correlated with the evolution of the patients, both of whom showed late signs of air leak, which confirmed the scintigraphy findings. In the patients with complete resolution of symptoms and fistula closure seen on bronchoscopy, the scintigraphy was completely negative. In cases of failure to close the BPF, the scintigraphy confirmed the persistence of the air leak. In two patients, scintigraphy was the only method to show residual BPF, the fistula no longer being seen on bronchoscopy. Conclusion: We found pulmonary inhalation-perfusion scintigraphy to be a useful tool for identifying a residual BPF, as well as being an alternative method of investigating BPFs and of monitoring the affected patients.
DOI: 10.6084/m9.figshare.7243919.v1
title: Mathematical Connections among Teachers in Mobile Cybereducation: how do they show themselves?

description: Abstract This research aimed to investigate how teachers in Mobile Cybereducation establish mathematical connections between peers. In order to do so, it was provided an education course based on the conception of Cybereducation with mathematics teachers (ROSA, 2015), which considers Digital Technologies (DT) in the context of Mathematics Education as participants in the knowledge production movement. In addition, regarding Mobile Cybereducation, this knowledge production movement is purposely raised in an informal manner through the smartphone, in line with social networks. In this sense, smartphones were made available for mobile access to these online platforms, while the participants were dispersed geographically. Under this bias, we understand the “being/participant” connected to a mobile device and this links us to the corporeity of these participants in the Merleau-Ponty (2011) perspective, pointing out as a result that teachers establish mathematical connections between peers hyper-textually plugged in a ubiquitously way. This perspective suggests the act of education with DT that happens all the time and everywhere, so that the technological resource becomes part of us, expanding/potentializing the mathematical connections made in a shared way.
DOI: 10.7284/135885
title: ADCP (Acoustic Doppler Current Profiler) data collected during research cruise SKQ201918S using a Hawaii UHDAS instrument system onboard the platform RV Sikuliaq

description: Original (unprocessed) data collected during a Field_expedition
DOI: 10.6084/m9.figshare.7243913
title: Automatic Procedure to Determine Acidity in Fuel Ethanol by Photometric Titration Using Binary Search and Multicommuted Flow Analysis

description: An automatic photometric titration procedure was developed to determine the acidity of fuel ethanol. The procedure was implemented by using a binary search algorithm and a multicommuted flow analysis approach. Solution-handling setup included a homemade syringe pump and a set of solenoid valves, which were assembled to treat the solution-handling as a time function controlled by a microcomputer. Photometer detection was performed using a compact homemade light emitting diode (LED)-based photometer. Aiming to evaluate the accuracy, samples were analyzed by employing the methodologies recommended by the Brazilian Association of Technical Standards (ABNT) and the American Society for Testing and Materials (ASTM). Accuracy was assessed by applying the Student’s t-test for paired samples at the 95% confidence level (n = 4), which shown that there is no significant difference between results. Other useful features included relative standard deviation of &lt; 1% and waste generation volume ten times lower than those produced by ABNT and ASTM methods.
DOI: 10.6084/m9.figshare.7243916.v1
title: Pulmonary inhalation-perfusion scintigraphy in the evaluation of bronchoscopic treatment of bronchopleural fistula

description: Abstract Objective: To evaluate the use of pulmonary inhalation-perfusion scintigraphy as an alternative method of investigation and follow-up in patients with bronchopleural fistula (BPF). Materials and Methods: Nine patients with BPFs were treated through the off-label use of a transcatheter atrial septal defect occluder, placed endoscopically, and were followed with pulmonary inhalation-perfusion scintigraphy, involving inhalation, via a nebulizer, of 900-1300 MBq (25-35 mCi) of technetium-99m-labeled diethylenetriaminepentaacetic acid and single-photon emission computed tomography with a dual-head gamma camera. Results: In two cases, there was a residual air leak that was not identified by bronchoscopy or the methylene blue test but was detected only by pulmonary inhalation-perfusion scintigraphy. Those results correlated with the evolution of the patients, both of whom showed late signs of air leak, which confirmed the scintigraphy findings. In the patients with complete resolution of symptoms and fistula closure seen on bronchoscopy, the scintigraphy was completely negative. In cases of failure to close the BPF, the scintigraphy confirmed the persistence of the air leak. In two patients, scintigraphy was the only method to show residual BPF, the fistula no longer being seen on bronchoscopy. Conclusion: We found pulmonary inhalation-perfusion scintigraphy to be a useful tool for identifying a residual BPF, as well as being an alternative method of investigating BPFs and of monitoring the affected patients.
DOI: 10.7284/135882
title: Anemometer data collected during research cruise SKQ201918S using a Gill WindObserver 75 instrument system onboard the platform RV Sikuliaq

description: Original (unprocessed) data collected during a Field_expedition
DOI: 10.6084/m9.figshare.7243910
title: Aluminum tolerance in castor bean lines1

description: ABSTRACT Castor bean plants are susceptible to aluminum (Al) in the soil, requiring adequate management techniques for their cultivation in acid soils containing high Al levels, as it occurs in tropical regions. This study aimed to assess the Al tolerance of castor bean lines. A randomized block design, in a 2 x 9 factorial scheme, with four replicates, was used. The treatments consisted of presence and absence of Al, as well as nine castor bean lines (CRZ H06, CRZ H11, CRZ H12, CRZ H15, CRZ H17, CRZ H18, CRZ H19, CRZ H22 and FCA). Based on a distribution into quartiles, the lines were divided into two groups. The Al-tolerant group contained the CRZ H06, H11 and H17 lines, while the group susceptible to Al was composed of CRZ H12, H15, H18, H19, H22 and FCA. The FCA and CRZ H17 lines showed the highest growth, when cultivated without Al.
DOI: 10.6084/m9.figshare.7243910.v1
title: Aluminum tolerance in castor bean lines1

description: ABSTRACT Castor bean plants are susceptible to aluminum (Al) in the soil, requiring adequate management techniques for their cultivation in acid soils containing high Al levels, as it occurs in tropical regions. This study aimed to assess the Al tolerance of castor bean lines. A randomized block design, in a 2 x 9 factorial scheme, with four replicates, was used. The treatments consisted of presence and absence of Al, as well as nine castor bean lines (CRZ H06, CRZ H11, CRZ H12, CRZ H15, CRZ H17, CRZ H18, CRZ H19, CRZ H22 and FCA). Based on a distribution into quartiles, the lines were divided into two groups. The Al-tolerant group contained the CRZ H06, H11 and H17 lines, while the group susceptible to Al was composed of CRZ H12, H15, H18, H19, H22 and FCA. The FCA and CRZ H17 lines showed the highest growth, when cultivated without Al.
DOI: 10.6084/m9.figshare.7243904
title: On the Counterpropagation of Waves

description: Abstract This work analyses the counterpropagation of transversal plane waves in a linear, homogeneous, nondispersive, and isotropic medium. Although this is a traditional subject in disciplines associated with wave phenomena, a propagation analysis is not found in the literature. With this purpose, the resultant wave and consecutively its phase velocity in such system are obtained analytically. Instead of what happens with the individual waves, the analytical results demonstrate that the phase velocity of the resultant wave actually is not a constant and depends explicitly of the time or the spatial coordinates, and principally depends of the amplitudes of the individual waves. This last remarkable feature, when considering as example electromagnetic systems, can be used to adequately control and accelerate particles in a charged medium. Full agreement between the analytical and numerical results is found.
DOI: 10.6084/m9.figshare.7243904.v1
title: On the Counterpropagation of Waves

description: Abstract This work analyses the counterpropagation of transversal plane waves in a linear, homogeneous, nondispersive, and isotropic medium. Although this is a traditional subject in disciplines associated with wave phenomena, a propagation analysis is not found in the literature. With this purpose, the resultant wave and consecutively its phase velocity in such system are obtained analytically. Instead of what happens with the individual waves, the analytical results demonstrate that the phase velocity of the resultant wave actually is not a constant and depends explicitly of the time or the spatial coordinates, and principally depends of the amplitudes of the individual waves. This last remarkable feature, when considering as example electromagnetic systems, can be used to adequately control and accelerate particles in a charged medium. Full agreement between the analytical and numerical results is found.
DOI: 10.6084/m9.figshare.7243907
title: Biological development of Euborellia annulipes reared with artificial diets and Ephestia kuehniella eggs1

description: ABSTRACT One of the forms of integrated pest management is the rearing of insects using artificial diets. The Euborellia annulipes species has gained prominence for being voracious with its preys, demonstrating a potential for use in biological control programs. This study aimed to evaluate the biological development of the E. annulipes predator fed with artificial diets and E. kuehniella eggs. Newly hatched predator nymphs were separated into an experimental unit consisting of 5 insects, 10 replicates and 7 treatments. The instars duration, nymphal period and viability, postures, number of eggs per posture, period of pre-oviposition and egg incubation and egg viability were evaluated. There was no difference for the periods nymphal, pre-oviposition and incubation of E. annulipes eggs. Oviposition ranged from 23.8 to 73.0 eggs/posture, as a function of diet. Artificial diets based on E. kuehniella eggs can be used for rearing E. annulipes. However, reared eggs fed with rice flour should be avoided, because they reduce oviposition and influence the E. annulipes development.
DOI: 10.7284/135883
title: Anemometer data collected during research cruise SKQ201918S using a Gill WindObserver 75 instrument system onboard the platform RV Sikuliaq

description: Processed data created by vessel technician during a Field_expedition
DOI: 10.6084/m9.figshare.7243907.v1
title: Biological development of Euborellia annulipes reared with artificial diets and Ephestia kuehniella eggs1

description: ABSTRACT One of the forms of integrated pest management is the rearing of insects using artificial diets. The Euborellia annulipes species has gained prominence for being voracious with its preys, demonstrating a potential for use in biological control programs. This study aimed to evaluate the biological development of the E. annulipes predator fed with artificial diets and E. kuehniella eggs. Newly hatched predator nymphs were separated into an experimental unit consisting of 5 insects, 10 replicates and 7 treatments. The instars duration, nymphal period and viability, postures, number of eggs per posture, period of pre-oviposition and egg incubation and egg viability were evaluated. There was no difference for the periods nymphal, pre-oviposition and incubation of E. annulipes eggs. Oviposition ranged from 23.8 to 73.0 eggs/posture, as a function of diet. Artificial diets based on E. kuehniella eggs can be used for rearing E. annulipes. However, reared eggs fed with rice flour should be avoided, because they reduce oviposition and influence the E. annulipes development.
DOI: 10.6084/m9.figshare.7243901
title: Diurnal Energy Balance in a Mango Orchard in the Northeast of Pará, Brazil

description: Abstract This study aimed to evaluate the diurnal energy balance during the reproductive stage of two growing seasons of a mango orchard in the northeast of Pará, Brazil. Therefore, a micrometeorological tower was installed and instrumented, in the center of the experimental area, to monitor meteorological variables, besides the phenological evaluation of the mango orchard, which was carried out during growing seasons of 2010-2011 (October 2010 to January 2011) and of 2011-2012 (September 2011 to January 2012). The energy balance was obtained by the bowen ration technique, and the available energy partitioned into heat flux to the ground, sensible heat and latent heat. The amount of rainfall was crucial to the partition of the net radiation in the energy balance components. It provided the variation in the consumption of available energy between 69% and 78% as latent heat flux, and between 23% and 32% as sensible heat flux. The heat flux to the ground was small, representing less than 1% of the net radiation, showing that the mango orchard exhibits good soil cover preventing large variations in soil heating.
DOI: 10.7284/135869
title: Expendable Probe data collected during research cruise SKQ201918S using a Sippican MK21 instrument system onboard the platform RV Sikuliaq

description: Original (unprocessed) data collected during a Field_expedition
DOI: 10.6084/m9.figshare.7243901.v1
title: Diurnal Energy Balance in a Mango Orchard in the Northeast of Pará, Brazil

description: Abstract This study aimed to evaluate the diurnal energy balance during the reproductive stage of two growing seasons of a mango orchard in the northeast of Pará, Brazil. Therefore, a micrometeorological tower was installed and instrumented, in the center of the experimental area, to monitor meteorological variables, besides the phenological evaluation of the mango orchard, which was carried out during growing seasons of 2010-2011 (October 2010 to January 2011) and of 2011-2012 (September 2011 to January 2012). The energy balance was obtained by the bowen ration technique, and the available energy partitioned into heat flux to the ground, sensible heat and latent heat. The amount of rainfall was crucial to the partition of the net radiation in the energy balance components. It provided the variation in the consumption of available energy between 69% and 78% as latent heat flux, and between 23% and 32% as sensible heat flux. The heat flux to the ground was small, representing less than 1% of the net radiation, showing that the mango orchard exhibits good soil cover preventing large variations in soil heating.
DOI: 10.7284/135871
title: Flowmeter data collected during research cruise SKQ201918S using a Krohne Optiflux 5000 instrument system onboard the platform RV Sikuliaq

description: Original (unprocessed) data collected during a Field_expedition
DOI: 10.6084/m9.figshare.7243895
title: Behaviour of cementitious matrices subjected to the combined action of chloride ions and carbonation

description: ABSTRACT Carbonation and chloride action are the two leading causes of degradation in reinforced concrete structures. Despite the combined action of these two mechanisms being a reality, there is little research on the effect of this combination in cementitious matrices. Furthermore, the incorporation of fly ash in cementitious matrices has been frequently used in order to make the matrix more resistant to the action of chlorides. On the other hand, it is known that Ca(OH)2 existing in the matrix is consumed by the pozzolanic reactions, which makes easier the carbonation front advance. Therefore, this paper presents a study of the behavior of cementitious matrices, with and without fly ash, subjected to the combined action of chlorides and carbonation. Two different kinds of mortars were produced: reference (only cement CEM I 42.5R) and fly ash mortar (40% replacement of cement). After curing, the specimens were subjected to three different wetting-drying cycles, considering NaCl solutions and CO2 atmospheres. Afterwards, chloride profiles and carbonation front were measured. Results show that carbonation has a direct influence on chloride penetration, decreasing it for cement mortars with 0% fly ash and increasing it for mortars with 40% cement replacement by fly ash. Moreover, the evolution of carbonation is also influenced by chloride presence, which decreases under the combined action.
DOI: 10.6084/m9.figshare.7243889
title: An application of the dynamics of a particle in a predetermined path: the problem of the ellipsoidal igloo

description: Abstract In the present work the classical problem of a particle which describes a segment of a circular path while sliding over a polished spherical surface of an igloo is extended to the case of an ellipsoidal igloo. In this case, the height in which the particle loses the contact with the surface of the igloo obeys a cubic equation whose coefficients depends on the parameters that determine the elliptical path. The analytical solution of this equation is then obtained through the method of Cardano-Tartaglia.
DOI: 10.6084/m9.figshare.7243895.v1
title: Behaviour of cementitious matrices subjected to the combined action of chloride ions and carbonation

description: ABSTRACT Carbonation and chloride action are the two leading causes of degradation in reinforced concrete structures. Despite the combined action of these two mechanisms being a reality, there is little research on the effect of this combination in cementitious matrices. Furthermore, the incorporation of fly ash in cementitious matrices has been frequently used in order to make the matrix more resistant to the action of chlorides. On the other hand, it is known that Ca(OH)2 existing in the matrix is consumed by the pozzolanic reactions, which makes easier the carbonation front advance. Therefore, this paper presents a study of the behavior of cementitious matrices, with and without fly ash, subjected to the combined action of chlorides and carbonation. Two different kinds of mortars were produced: reference (only cement CEM I 42.5R) and fly ash mortar (40% replacement of cement). After curing, the specimens were subjected to three different wetting-drying cycles, considering NaCl solutions and CO2 atmospheres. Afterwards, chloride profiles and carbonation front were measured. Results show that carbonation has a direct influence on chloride penetration, decreasing it for cement mortars with 0% fly ash and increasing it for mortars with 40% cement replacement by fly ash. Moreover, the evolution of carbonation is also influenced by chloride presence, which decreases under the combined action.
DOI: 10.7284/135872
title: Fluorometer data collected during research cruise SKQ201918S using a Turner Cyclops-7 instrument system onboard the platform RV Sikuliaq

description: Original (unprocessed) data collected during a Field_expedition
DOI: 10.6084/m9.figshare.7243886
title: Are surface and deep learning approaches associated with study patterns and choices among medical students? A cross-sectional study

description: ABSTRACT BACKGROUND: Different approaches to learning can exert considerable influence on the teaching-learning process in medical education. This study aimed to investigate the association of surface and deep learning with study patterns, preferred type of assessment, practices of cheating and quality of sleep among medical students. DESIGN AND SETTING: Cross-sectional study on medical students enrolled in all six years of a medical school in Juiz de Fora, Brazil. METHODS: Questionnaires were applied to evaluate learning approaches (R-SPQ-2F), study patterns, sources and choices, and quality of sleep. Students’ learning approaches (deep or surface) were assessed in relation to their study patterns, study resources, quality of sleep and whether they cheated in tests. RESULTS: Among the 710 students included, 43% frequently studied on the night before an exam, 65% had used psychostimulants to study and more than 46% had cheated in an exam. Regarding quality of sleep, most students (53.4%) reported that their quality of sleep was poor, such that 45.3% slept for fewer than five hours before an exam. Those who studied just prior to an exam, used class summaries, preferred multiple-choice questions and cheated during the test had a more surface-learning approach. On the other hand, those who read books, preferred practical exams and slept better had a deeper approach. CONCLUSION: The type of learning approach was associated with study patterns and choices among medical students. Educators need to be attentive to the type of learning their students use and think of measures that impact teaching and assessment methods.
DOI: 10.6084/m9.figshare.7243889.v1
title: An application of the dynamics of a particle in a predetermined path: the problem of the ellipsoidal igloo

description: Abstract In the present work the classical problem of a particle which describes a segment of a circular path while sliding over a polished spherical surface of an igloo is extended to the case of an ellipsoidal igloo. In this case, the height in which the particle loses the contact with the surface of the igloo obeys a cubic equation whose coefficients depends on the parameters that determine the elliptical path. The analytical solution of this equation is then obtained through the method of Cardano-Tartaglia.