cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.8259329
title: Water management in a concrete plant: Moringa oleifera employment analysis without wastewater treatment and reuse proposal after treatment

description: ABSTRACT The civil construction acivities, great consumers of raw material and water resources, ha demonstrated signs to achieve a sustainable production. In this sector, the management and reuse of residual waters in concrete batchers would contribute in the decrease of negative impacts with relation to environment. However, to make the residual water reuse, viable, it is needed to make its threat, aimming the adequacy of such indicators as, alkalinity, residual free chlorine, hardness, ph and turbidity with the current regulations. Therefore, this article avaluated the possible applications for residual water threated with the use of “moringa oleifera” aqueous extract, obtained by two ways, as: only in distilled water (EAMO) and other in water distilled with calcium nitrate (EAMO/Ca2+) and with aluminium sulfate (Al2(SO4)3) as the chemical coagulant. The analized threats made the decrease of alkalinity to 22% with EAMO/Ca2+ and 16% with the Al2(SO4)3
DOI: 10.6084/m9.figshare.8259323
title: Impact on the mechanical properties of concrete cured at low temperatures

description: Abstract The curing process of cementitious matrices is very important in determining their properties in the hardened state. In these circumstances, concrete can suffer serious damage when exposed to severe thermal variations. The low curing temperatures in which the cementitious matrices are exposed can influence their properties in the hardened state, especially in the early ages, impairing the processes of shaping and shoring. Intense cold places must follow specific dosing procedures and application of a cementitious matrix. Thus, this research aimed to analyze the influence of curing temperature on the mechanical and physical behavior of concretes at different curing temperatures, both at the early and later ages. It was observed that the decrease in curing temperature provided an increase of resistance up to 26% at the age of 28 days in the analyzed concretes, even though they presented slow development of the mechanical properties in the initial 7 days. Concretes with higher cement consumption showed better performance in early ages when submitted to temperatures lower than 3 °C. However, it was observed that curing at low temperatures is able to provide more intact mixtures at advanced ages, since they achieved higher ultrasonic wave propagation velocity and resistance, due to the residual hydration of the cement.
DOI: 10.6084/m9.figshare.8259329.v1
title: Water management in a concrete plant: Moringa oleifera employment analysis without wastewater treatment and reuse proposal after treatment

description: ABSTRACT The civil construction acivities, great consumers of raw material and water resources, ha demonstrated signs to achieve a sustainable production. In this sector, the management and reuse of residual waters in concrete batchers would contribute in the decrease of negative impacts with relation to environment. However, to make the residual water reuse, viable, it is needed to make its threat, aimming the adequacy of such indicators as, alkalinity, residual free chlorine, hardness, ph and turbidity with the current regulations. Therefore, this article avaluated the possible applications for residual water threated with the use of “moringa oleifera” aqueous extract, obtained by two ways, as: only in distilled water (EAMO) and other in water distilled with calcium nitrate (EAMO/Ca2+) and with aluminium sulfate (Al2(SO4)3) as the chemical coagulant. The analized threats made the decrease of alkalinity to 22% with EAMO/Ca2+ and 16% with the Al2(SO4)3
DOI: 10.6084/m9.figshare.8259311
title: Hypotonic enteral electrolyte solutions administered by nasoesophageal tube in continuous flow in dogs dehydrated by water restriction: Part 1

description: ABSTRACT The present study assessed and compared the effects of hypotonic enteral electrolyte solutions administered by nasoesophageal tube in continuous flow in dogs submitted to water restriction on packed cell volume; total serum protein and serum osmolarity concentrations; blood volume; plasma glucose and lactate levels; blood gas analysis, anion gap, and strong ion difference. Six adult dogs were used (four males and two females). All animals were submitted to both proposed treatments in a crossover design 6×2. The treatments were as follows: ESmalt consisting of 5g sodium chloride, 1g potassium chloride, 1g calcium acetate, 0.2g magnesium pidolate, and 9.6g maltodextrin that were diluted in 1.000mL water (measured osmotic concentration of 215mOsm L−1) and ESdext consisting of 5g sodium chloride, 1g potassium chloride, 1g calcium acetate, 0.2g magnesium pidolate, and 9.6g dextrose that were diluted in 1.000mL water (measured osmotic concentration of 243mOsm L−1). All solutions were administered at 15ml kg−1 h−1 for 4 hours. Both solutions increased the plasma volume in dehydrated dogs without causing adverse effects. However, ESmalt was more effective in promoting the increase in blood volume.
DOI: 10.6084/m9.figshare.8259320
title: Case Report: Surgical Treatment of High-Flow Coronary Fistulas for the Pulmonary Artery

description: Abstract Coronary fistulas are rare anomalies that can affect approximately 1% of the population, presenting few specific symptoms, and are often found occasionally in coronary angiography. Here we describe the case of a 61-year-old patient with complaints of precordialgia and dyspnea since adolescence, with late diagnosis of coronary fistulas with drainage to the pulmonary artery, and with unsuccessful percutaneous treatment. Therefore, she underwent open surgery for the correction of the already known fistulas, in addition to the hemangioma involving such vessels, which made the understanding and resolution of this case more complex.
DOI: 10.6084/m9.figshare.8259323.v1
title: Impact on the mechanical properties of concrete cured at low temperatures

description: Abstract The curing process of cementitious matrices is very important in determining their properties in the hardened state. In these circumstances, concrete can suffer serious damage when exposed to severe thermal variations. The low curing temperatures in which the cementitious matrices are exposed can influence their properties in the hardened state, especially in the early ages, impairing the processes of shaping and shoring. Intense cold places must follow specific dosing procedures and application of a cementitious matrix. Thus, this research aimed to analyze the influence of curing temperature on the mechanical and physical behavior of concretes at different curing temperatures, both at the early and later ages. It was observed that the decrease in curing temperature provided an increase of resistance up to 26% at the age of 28 days in the analyzed concretes, even though they presented slow development of the mechanical properties in the initial 7 days. Concretes with higher cement consumption showed better performance in early ages when submitted to temperatures lower than 3 °C. However, it was observed that curing at low temperatures is able to provide more intact mixtures at advanced ages, since they achieved higher ultrasonic wave propagation velocity and resistance, due to the residual hydration of the cement.
DOI: 10.6084/m9.figshare.8259326.v1
title: Numerical approach of the steel-concrete bond behavior using pull-out models

description: ABSTRACT This paper deals with the analysis of monotonic loading behavior in pull-out tests. The main objective is to obtain a reliable numerical model to represent the steel-concrete bond behavior using previously obtained experimental results. The tests were performed in RILEM pull-out specimen using 10 mm steel bar and concrete with compressive strength of 30 MPa. The numerical study used Ansys® software, based on FEM (Finite Elements Method). The numerical simulation adopted non-linear constitutive relationships to represent the behavior of both concrete and steel. A contact surface composed of special finite elements modeled the interface between the concrete and the steel bar, allowing a steel–concrete slip. The numerical analysis performed with variation of the main parameters of the software permitted determining the best ones, and choosing them to obtain a good representation of the bond phenomena. The numerical results had a good agreement with the experimental results. Both linear and non-linear approaches represented the pre-peak behavior, however only the non-linear model gave the best approach for the pull-out force. In addition, the numerical results had shown the simplified model can be used to represent the steel-concrete bond behavior reducing the processing time for current structures analysis.
DOI: 10.6084/m9.figshare.8259311.v1
title: Hypotonic enteral electrolyte solutions administered by nasoesophageal tube in continuous flow in dogs dehydrated by water restriction: Part 1

description: ABSTRACT The present study assessed and compared the effects of hypotonic enteral electrolyte solutions administered by nasoesophageal tube in continuous flow in dogs submitted to water restriction on packed cell volume; total serum protein and serum osmolarity concentrations; blood volume; plasma glucose and lactate levels; blood gas analysis, anion gap, and strong ion difference. Six adult dogs were used (four males and two females). All animals were submitted to both proposed treatments in a crossover design 6×2. The treatments were as follows: ESmalt consisting of 5g sodium chloride, 1g potassium chloride, 1g calcium acetate, 0.2g magnesium pidolate, and 9.6g maltodextrin that were diluted in 1.000mL water (measured osmotic concentration of 215mOsm L−1) and ESdext consisting of 5g sodium chloride, 1g potassium chloride, 1g calcium acetate, 0.2g magnesium pidolate, and 9.6g dextrose that were diluted in 1.000mL water (measured osmotic concentration of 243mOsm L−1). All solutions were administered at 15ml kg−1 h−1 for 4 hours. Both solutions increased the plasma volume in dehydrated dogs without causing adverse effects. However, ESmalt was more effective in promoting the increase in blood volume.
DOI: 10.6084/m9.figshare.8259320.v1
title: Case Report: Surgical Treatment of High-Flow Coronary Fistulas for the Pulmonary Artery

description: Abstract Coronary fistulas are rare anomalies that can affect approximately 1% of the population, presenting few specific symptoms, and are often found occasionally in coronary angiography. Here we describe the case of a 61-year-old patient with complaints of precordialgia and dyspnea since adolescence, with late diagnosis of coronary fistulas with drainage to the pulmonary artery, and with unsuccessful percutaneous treatment. Therefore, she underwent open surgery for the correction of the already known fistulas, in addition to the hemangioma involving such vessels, which made the understanding and resolution of this case more complex.
DOI: 10.6084/m9.figshare.8259302
title: Effect of changes to the formal curriculum on medical students’ motivation towards learning: a prospective cohort study

description: ABSTRACT BACKGROUND: One of the factors known to influence performance in the learning process is student motivation. In turn, students’ motivation can be regulated by a large number of variables relating to the individual (such as sex, age and socioeconomic status) or to aspects of the academic life. OBJECTIVE: The primary aim of this study was to evaluate the influence of curriculum changes involving reduction in content overload and increased early exposure to clinical settings, on motivation towards learning among Year 1 medical students. Secondarily, the aim was to ascertain whether this influence on motivation remained stable until the undergraduate program ended (Year 6). DESIGN AND SETTING: Prospective study on two student cohorts at a Brazilian state-owned university. METHODS: Two consecutive student cohorts were assessed: one with a traditional curriculum (n = 87) and the other with a reformed curriculum (n = 63), at the same medical school. Participants in both cohorts gave responses on four scales in Years 1 and 6: the Academic Motivation Scale, containing subscales for autonomous and controlled motivation, and lack of motivation towards learning; Beck’s Anxiety and Depression Inventories; Spielberger’s State-Trait Anxiety Inventory; and the Social Adjustment Scale. In Year 6, 68% of the initial sample (66 students with the traditional curriculum and 36 with the reformed curriculum) was reassessed. RESULTS: No differences between Year 1 cohorts were found regarding demographic and social background, social adjustment, depression or anxiety. Students with the reformed curriculum scored significantly higher regarding autonomous and controlled motivation than those with the traditional curriculum. Comparison between Year 6 and Year 1 showed increases in controlled motivation only for the traditional curriculum cohort. CONCLUSION: Curriculum changes were associated with increased motivation towards learning in Year 1, which persisted until Year 6.
DOI: 10.6084/m9.figshare.8259305
title: The 'detrimental effect' of corruption in Brazil: 'who pays more?' Applications using instrumental variable quantile regression

description: Abstract This study analyzes the impact of corruption on the dynamics of investment by Brazilian companies. For this, was employed a sample of 3,444 companies according to microdata available by the World Bank Enterprise Surveys. Using instrumental variable quantile regression estimator, the model results indicate that, in the absence of control due to endogeneity problems, the traditional estimator Koenker and Basset tends to underestimating the impact of corruption in reducing the elasticity coefficients of business investment. Firms located in the upper quantile of the conditional distribution of sales have better results in the implementation of investments even after the perceptual effect of corruption, unlike firms in lower quantiles. This suggests that firms with high performance are less "impacted" with the presence of corruption in relation to firms with poor performance.
DOI: 10.6084/m9.figshare.8259299
title: Hemoparasites in ticks of wild birds of Serra dos Órgãos National Park, state of Rio de Janeiro, Brazil

description: Abstract The aim of this study is to detect the presence of tick-borne agents of genera Rickettsia, Borrelia, Babesia, Ehrlichia and Anaplasma in ticks collected from native wild birds in the state of Rio de Janeiro. Birds were captured and observed carefully to find the ectoparasites. DNA detection of hemoparasites was performed by means of the polymerase chain reaction (PCR). The sequences obtained were analyzed and their homologies were compared to the available isolates in the GenBank platform database. A total of 33 birds were captured from 20 different species, of which 14 were parasitized by Amblyomma longirostre (n = 22). There was absence of DNA from agents of the genera Babesia, Anaplasma and Ehrlichia in the evaluated samples. The phylogenetic analysis indicated that one sample had 100% identity with Rickettsia bellii (KJ534309), the other two samples showed 100% identity with Rickettsia sp. Aranha strain and strain AL (EU274654 and AY360216). The positive sample for R. bellii was also demonstrated to be positive for Borrelia sp., which presented a similarity of 91% with Borrelia turcica (KF422815). This is the first description of Borrelia sp. in ticks of the genus Amblyomma in South America.
DOI: 10.6084/m9.figshare.8259299.v1
title: Hemoparasites in ticks of wild birds of Serra dos Órgãos National Park, state of Rio de Janeiro, Brazil

description: Abstract The aim of this study is to detect the presence of tick-borne agents of genera Rickettsia, Borrelia, Babesia, Ehrlichia and Anaplasma in ticks collected from native wild birds in the state of Rio de Janeiro. Birds were captured and observed carefully to find the ectoparasites. DNA detection of hemoparasites was performed by means of the polymerase chain reaction (PCR). The sequences obtained were analyzed and their homologies were compared to the available isolates in the GenBank platform database. A total of 33 birds were captured from 20 different species, of which 14 were parasitized by Amblyomma longirostre (n = 22). There was absence of DNA from agents of the genera Babesia, Anaplasma and Ehrlichia in the evaluated samples. The phylogenetic analysis indicated that one sample had 100% identity with Rickettsia bellii (KJ534309), the other two samples showed 100% identity with Rickettsia sp. Aranha strain and strain AL (EU274654 and AY360216). The positive sample for R. bellii was also demonstrated to be positive for Borrelia sp., which presented a similarity of 91% with Borrelia turcica (KF422815). This is the first description of Borrelia sp. in ticks of the genus Amblyomma in South America.
DOI: 10.6084/m9.figshare.8259302.v1
title: Effect of changes to the formal curriculum on medical students’ motivation towards learning: a prospective cohort study

description: ABSTRACT BACKGROUND: One of the factors known to influence performance in the learning process is student motivation. In turn, students’ motivation can be regulated by a large number of variables relating to the individual (such as sex, age and socioeconomic status) or to aspects of the academic life. OBJECTIVE: The primary aim of this study was to evaluate the influence of curriculum changes involving reduction in content overload and increased early exposure to clinical settings, on motivation towards learning among Year 1 medical students. Secondarily, the aim was to ascertain whether this influence on motivation remained stable until the undergraduate program ended (Year 6). DESIGN AND SETTING: Prospective study on two student cohorts at a Brazilian state-owned university. METHODS: Two consecutive student cohorts were assessed: one with a traditional curriculum (n = 87) and the other with a reformed curriculum (n = 63), at the same medical school. Participants in both cohorts gave responses on four scales in Years 1 and 6: the Academic Motivation Scale, containing subscales for autonomous and controlled motivation, and lack of motivation towards learning; Beck’s Anxiety and Depression Inventories; Spielberger’s State-Trait Anxiety Inventory; and the Social Adjustment Scale. In Year 6, 68% of the initial sample (66 students with the traditional curriculum and 36 with the reformed curriculum) was reassessed. RESULTS: No differences between Year 1 cohorts were found regarding demographic and social background, social adjustment, depression or anxiety. Students with the reformed curriculum scored significantly higher regarding autonomous and controlled motivation than those with the traditional curriculum. Comparison between Year 6 and Year 1 showed increases in controlled motivation only for the traditional curriculum cohort. CONCLUSION: Curriculum changes were associated with increased motivation towards learning in Year 1, which persisted until Year 6.
DOI: 10.6084/m9.figshare.8259305.v1
title: The 'detrimental effect' of corruption in Brazil: 'who pays more?' Applications using instrumental variable quantile regression

description: Abstract This study analyzes the impact of corruption on the dynamics of investment by Brazilian companies. For this, was employed a sample of 3,444 companies according to microdata available by the World Bank Enterprise Surveys. Using instrumental variable quantile regression estimator, the model results indicate that, in the absence of control due to endogeneity problems, the traditional estimator Koenker and Basset tends to underestimating the impact of corruption in reducing the elasticity coefficients of business investment. Firms located in the upper quantile of the conditional distribution of sales have better results in the implementation of investments even after the perceptual effect of corruption, unlike firms in lower quantiles. This suggests that firms with high performance are less "impacted" with the presence of corruption in relation to firms with poor performance.
DOI: 10.6084/m9.figshare.8259284
title: Polymerase chain reaction for sexing in giant anteater's (Myrmecophaga tridactyla)

description: ABSTRACT There is no sexual dimorphism in the giant anteater (Myrmecophaga tridactyla), so the distinction between males and females become necessary, especially in animals with reproductive purpose. The Polymerase Chain Reaction (PCR), among the various techniques used for characterization, is considered a modern and effective means of sex determination and used in mammals to identify the Y chromosome (SRY) specifies genetic sequence. The objective of this work is to standardize a protocol for sex determination of giant anteater by PCR technique, using genetic material extracted from the capillary bulb of these animals. With this protocol was possible the sex determination of seven tested animals, being compatible with the sex of each individual. In conclusion, this protocol showed total effectiveness, being possible to determine the giant anteater sex using genetic material extracted from the capillary bulb.
DOI: 10.6084/m9.figshare.8259290
title: A political economic view about the Brazil's minimum price guarantee policy

description: Abstract This paper aims to analyze the evolution of the agricultural minimum price guarantee policy (PGPM in Portuguese) in Brazil from 1987 through 2014 (a time period when profound changes took place in both formulation and grants of the mentioned policy) under the political economy point of view. The latter considers, among other issues, the role of interest groups, macro policy system (including the decision arenas), policy subsystems and policy networks. All of them help to understand the three major changes in PGPM during the last 20 years: (1st) the split between support programs for family farming and for non-family farming; (2nd) the less subventionary features of the new PGPM instruments that meet the non-family agriculture; and (3rd) the donor character of programs that cater to family farming.
DOI: 10.6084/m9.figshare.8259293
title: Advancement of research involving Aspergillus niger and sugarcane bagasse as a source of carbon for the production of cellulases: A bibliometric analysis

description: ABSTRACT A variety of studies have been realized with the objective of producing celulases with low cost to be used in the production of second generation alcohol (2G) from lignocellulosic residues. Among them, the use of sugarcane bagasse as carbon source for the growth of microorganisms is highlighted. Based on this, this article aimed to carry out a bibliometric review on the use of Aspergillus niger using sugarcane bagasse as a carbon source, aiming the production of cellulase, through the study of scientific and technological advances on the themes. To perform the review, we used the Web of Science database, inserting four keywords: "Aspergillus niger", "cellulase", "cane" and "submerged" between the years of 1945 and 2018. From this search, was possible to identify the most important authors, periodicals and research groups in this subject. It was identified an increase in the number of publications over the years by several countries, showing interest in the production of lower cost cellulases for 2G alcohol generation. Brazil was the country with the largest number of publications on the subject, due to the great capacity of planting sugarcane and production of alcohol. By analyzing the correlation networks of the authors it was verified the existence of a relation of the research groups in Brazil, between the cities of Campinas, São Paulo and Curitiba and another association in Denmark, between the cities of Lyngby and Copenhagen.