cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.5668645
title: Efficacy of commercial synthetic pyrethroids and organophosphates associations used to control Rhipicephalus (Boophilus) microplus in Southern Brazil

description: Abstract This study evaluated the acaricidal efficiency of synthetic pyrethroids (SP) associated with organophosphates (OP) against Rhipicephalus (Boophilus) microplus populations in the state of Rio Grande do Sul, Southern Brazil. Ticks were collected in 54 cattle farms and tested using in vitro adult immersion test against four commercially available acaricide mixtures of SP and OP. Only one of four acaricides, comprising a mixture of cypermethrin, chlorpyrifos, and fenthion, had a mean efficiency higher than 95%, and was effective in 94.44% (51/54) of the cattle farms tested. The acaricide with a mixture of cypermethrin, chlorpyrifos, and citronelall had the lowest mean efficiency (62.11%), and was effective in 29.62% (16/54) of cattle farms tested. Furthermore, R. (B.) microplus in Southern Brazil exhibited differing degrees of resistance to SP and OP mixtures. The results suggest that the presence of fenthion contributes to the higher efficiency of the formulation with this active principle. This is possibly due to its recent commercial availability, as tick populations have been lower challenged with this product. Monitoring the resistance of ticks to carrapaticides is essential to maximize the efficiency of these products in the control of R. (B.) microplus.
DOI: 10.6084/m9.figshare.5668645.v1
title: Efficacy of commercial synthetic pyrethroids and organophosphates associations used to control Rhipicephalus (Boophilus) microplus in Southern Brazil

description: Abstract This study evaluated the acaricidal efficiency of synthetic pyrethroids (SP) associated with organophosphates (OP) against Rhipicephalus (Boophilus) microplus populations in the state of Rio Grande do Sul, Southern Brazil. Ticks were collected in 54 cattle farms and tested using in vitro adult immersion test against four commercially available acaricide mixtures of SP and OP. Only one of four acaricides, comprising a mixture of cypermethrin, chlorpyrifos, and fenthion, had a mean efficiency higher than 95%, and was effective in 94.44% (51/54) of the cattle farms tested. The acaricide with a mixture of cypermethrin, chlorpyrifos, and citronelall had the lowest mean efficiency (62.11%), and was effective in 29.62% (16/54) of cattle farms tested. Furthermore, R. (B.) microplus in Southern Brazil exhibited differing degrees of resistance to SP and OP mixtures. The results suggest that the presence of fenthion contributes to the higher efficiency of the formulation with this active principle. This is possibly due to its recent commercial availability, as tick populations have been lower challenged with this product. Monitoring the resistance of ticks to carrapaticides is essential to maximize the efficiency of these products in the control of R. (B.) microplus.
DOI: 10.6084/m9.figshare.5668642
title: Kepler's laws synthesis

description: The aim of this paper is to present the conception of the laws of planetary motion using the free softwares Stellarium and Geogebra to get and process data similar to those accessible to Kepler. Although this procedure is not exactly equal to the one accomplished by Kepler, it allows, in a didactic way, to understand and to apply the orientation followed by him in order to obtain his laws about the planetary motion. It is expected that the quantitative study here developed make clear the meaning of some qualitative discussions in several references on this subject and have didactic application.
DOI: 10.6084/m9.figshare.5668639
title: Detection of Anaplasma sp. phylogenetically related to A. phagocytophilum in a free-living bird in Brazil

description: Abstract Wild animals play an important role in carrying vectors that may potentially transmit pathogens. Several reports highlighted the participation of wild animals on the Anaplasma phagocytophilum cycle, including as hosts of the agent. The aim of this study was to report the molecular detection of an agent phylogenetically related to A. phagocytophilum isolated from a wild bird in the Midwest of the state of Paraná, Brazil. Fifteen blood samples were collected from eleven different bird species in the Guarapuava region. One sample collected from a Penelope obscura bird was positive in nested PCR targeting the 16S rRNA gene of Anaplasma spp. The phylogenetic tree based on the Maximum Likelihood analysis showed that the sequence obtained was placed in the same clade with A. phagocytophilum isolated from domestic cats in Brazil. The present study reports the first molecular detection of a phylogenetically related A. phagocytophilum bacterium in a bird from Paraná State.
DOI: 10.6084/m9.figshare.5668639.v1
title: Detection of Anaplasma sp. phylogenetically related to A. phagocytophilum in a free-living bird in Brazil

description: Abstract Wild animals play an important role in carrying vectors that may potentially transmit pathogens. Several reports highlighted the participation of wild animals on the Anaplasma phagocytophilum cycle, including as hosts of the agent. The aim of this study was to report the molecular detection of an agent phylogenetically related to A. phagocytophilum isolated from a wild bird in the Midwest of the state of Paraná, Brazil. Fifteen blood samples were collected from eleven different bird species in the Guarapuava region. One sample collected from a Penelope obscura bird was positive in nested PCR targeting the 16S rRNA gene of Anaplasma spp. The phylogenetic tree based on the Maximum Likelihood analysis showed that the sequence obtained was placed in the same clade with A. phagocytophilum isolated from domestic cats in Brazil. The present study reports the first molecular detection of a phylogenetically related A. phagocytophilum bacterium in a bird from Paraná State.
DOI: 10.6084/m9.figshare.11977392.v1
title: VTKEL 31k

description: VTKEL dataset for the 30k+ documents.
DOI: 10.6084/m9.figshare.5668633
title: Discussion of the paraxial approximation and numerical analysis of spherical aberration

description: Textbooks intended to undergraduate students discuss image formation by mirrors and lens based on paraxial approximation. This conventional approach has ambiguities and lacks which induce students to conceptual mistakes. This paper points out those ambiguities and demonstrates that a basic proposition of paraxial approximation has a very limited scope. Furthermore, as a didactical tool to overcome conceptual difficulties, figures are presented depicting ray trajectories and spherical aberrations, computed precisely in terms of the focusing systematic error, for object points at an infinite distance from the optic system, in different cases of mirrors and lenses. Results show that a ) the aberration for each ray depends mainly on the angular distance of its incidence point, b ) the aberration behavior is the same in mirrors and lens, c ) in concave and convex mirrors, for the same angular distance, focusing errors are the same, d ) the aberration varies in lens according to their light-facing side.
DOI: 10.6084/m9.figshare.5668630
title: Electrical, Thermal and Mechanical Properties of Epoxy/CNT/Calcium Carbonate Nanocomposites

description: Epoxy/CNT and epoxy/CNT/calcium carbonate nanocomposites were produced via in situ polymerization assisted by ultrasonication without solvent and electrical, mechanical, thermal and thermomechanical properties of nanocomposites were evaluated. Epoxy/CNT presented very low percolation threshold, near 0.05 wt % and nanocomposites with higher contents of CNT presented further increase in electrical conductivity. The addition of calcium carbonate in epoxy/CNT nanocomposites increased the electrical conductivity, due to volume exclusion phenomena. Regarding thermal properties, due to the low content of the CNT and calcium carbonate no changes in glass transition (Tg) were observed. DMA results showed no significant changes in thermomechanical properties, once the contents of CNT and calcium carbonate are below stiffness threshold, however an increase of flexural modulus by adding CNT and calcium carbonate was observed.
DOI: 10.6084/m9.figshare.5668630.v1
title: Electrical, Thermal and Mechanical Properties of Epoxy/CNT/Calcium Carbonate Nanocomposites

description: Epoxy/CNT and epoxy/CNT/calcium carbonate nanocomposites were produced via in situ polymerization assisted by ultrasonication without solvent and electrical, mechanical, thermal and thermomechanical properties of nanocomposites were evaluated. Epoxy/CNT presented very low percolation threshold, near 0.05 wt % and nanocomposites with higher contents of CNT presented further increase in electrical conductivity. The addition of calcium carbonate in epoxy/CNT nanocomposites increased the electrical conductivity, due to volume exclusion phenomena. Regarding thermal properties, due to the low content of the CNT and calcium carbonate no changes in glass transition (Tg) were observed. DMA results showed no significant changes in thermomechanical properties, once the contents of CNT and calcium carbonate are below stiffness threshold, however an increase of flexural modulus by adding CNT and calcium carbonate was observed.
DOI: 10.6084/m9.figshare.5668627
title: Health care for gas station workers: a report about the implementation of a health surveillance program and a worker embracement strategy in Campinas, São Paulo, Brazil

description: Abstract Introduction: the Regional Reference Center in Occupational Health (Cerest) and the Health Surveillance Department of the city of Campinas, along with the State Benzene Commission (São Paulo) and the Regional Benzene Commission (Campinas), developed the Gas Station Attendant Project, from 2005 to 2012, aiming at establishing a health care program for gas station workers in the city of Campinas. Objective: to report the project development and its results and to evaluate the practice of workers embracement as a strategy of action. Methods: the project was developed in stages, starting with a situational diagnosis and the preparation and establishment of a health care protocol for gas station attendants. A pilot project covering 10 gas stations and 136 attendants was carried out between February 2009 and October 2010. Results: the project identified working conditions resulting in benzene exposure risks and health problems which might be related to it. Conclusion: the workers’ high commitment to the project endorsed the adopted strategies. This experience may be used to subsidize the establishment of specific protocols by branch of work activity as a health surveillance strategy.
DOI: 10.6084/m9.figshare.5668627.v1
title: Health care for gas station workers: a report about the implementation of a health surveillance program and a worker embracement strategy in Campinas, São Paulo, Brazil

description: Abstract Introduction: the Regional Reference Center in Occupational Health (Cerest) and the Health Surveillance Department of the city of Campinas, along with the State Benzene Commission (São Paulo) and the Regional Benzene Commission (Campinas), developed the Gas Station Attendant Project, from 2005 to 2012, aiming at establishing a health care program for gas station workers in the city of Campinas. Objective: to report the project development and its results and to evaluate the practice of workers embracement as a strategy of action. Methods: the project was developed in stages, starting with a situational diagnosis and the preparation and establishment of a health care protocol for gas station attendants. A pilot project covering 10 gas stations and 136 attendants was carried out between February 2009 and October 2010. Results: the project identified working conditions resulting in benzene exposure risks and health problems which might be related to it. Conclusion: the workers’ high commitment to the project endorsed the adopted strategies. This experience may be used to subsidize the establishment of specific protocols by branch of work activity as a health surveillance strategy.
DOI: 10.6084/m9.figshare.5668624
title: Study and application of computational simulation in simple problems of fluid mechanics and heat transfer - Part II: Heat transfer classic problems

description: Continuing the study on the use of Computational Fluid Dynamics (CFD) in physics and engineering teaching, the present work aims to analyze and compare, for didactic purposes, solutions numerically obtained against known analytical and empirical solutions, commonly presented in the classroom and in undergraduate labs, of classical problems involving fluid dynamics and heat transfer. In this study the main focus was pointed to heat transfer problems. For the numerical solutions computation, one of the Computational Fluid Dynamics (CFD) softwares that represent its state-of-the-art, ANSYS CFX 12.1 was employed. The chosen problems were: laminar heated plate convection, laminar flow around a heated cylinder, turbulent internal flow in heated circular ducts and concentric tubes heat exchanger. These problems were chosen and solved by undergraduate students, demonstrating the usefulness of CFD as a tool for learning physical phenomena.
DOI: 10.6084/m9.figshare.5668618
title: The Lie symmetries of a Top

description: The existence of symmetries in differential equations can generate transformations of dependent and independent variables that facilitate the integration of these equations. In the nineteenth century, Sophus Lie developed a method of extracting symmetries that can be used effectively to reveal first integrals of a differential equation. These invariants can in some situations be identified by the Noether theorem or from manipulating the equations themselves with Lie transformations. Despite the formalism over conservation theorems for energy and linear/angular momentum, initial courses in classical mechanics often do not clearly or objectively highlight the relationship between conservation laws and the existence of possible Lie symmetries. For this reason, we seek to present an introduction to Lie symmetries using a language accessible to a graduate student in physics, mathematics, or engineering with basic mastery of classical mechanics in several variables. In order to illustrate the approach, we consider the classical problem of a spinning top with stationary precession. From the equations of motion, the Lie symmetries are identified and used in a transformation that results in an order reduction. The first integrals are obtained from this result using the Noether theorem, and we illustrate that the Lie symmetries for this problem are also Noether symmetries. Finally, the solution to the equations of motion are written using Jacobi elliptic functions, and from this we obtain the precession, nutation and spin angles under the presented conditions.
DOI: 10.6084/m9.figshare.5668615
title: Actinomycosis is not Frequent in the Periapex But is a Persistent Lesion

description: Abstract Periapical actinomycosis caused by a gram-positive anaerobic pathogen characterizes a typical extra-radicular infection. This study determined the frequency and correlated the content of bacteria colonies with the of periapical actinomycosis size. The study comprised a total of 218 periapical lesions (PL) (cysts, granulomas or abscess). The specimens embedded in paraffin were sliced into 4-µm sections and stained with hematoxylin-eosin, Gram, Periodic Acid-Schiff (PAS) and Grocott’s stain. The presence of bacterial colonies composed of filamentous structures labeled with the histochemical stains were described as Actinomyces, and for each case, the bacterial colonies were counted and measured. The correlation between the number and size of bacterial colonies and the size of PL was tested using Pearson’s adjusted correlation coefficient. From 218 PL, bacterial colonies were identified in 64 biopsies. Seven cases (0.3%) fulfill the criteria for diagnosis of periapical actinomycosis. All of cases were therapy-resistant and did not showed periapical repair after 12 months of follow-up. Periapical surgery or dental extraction was performed. The correlation test indicated no correlation between the number of bacterial colonies and the lesion size (p=0.752, r=-0.148). However, a larger bacterial colony size generally resulted in a larger periapical lesion (P=0.000, r=0.657). The frequency of periapical actinomycosis was low, and this lesion should be included in the differential diagnosis of PL. The size of the Actinomyces colonies seemed to contribute to increase the size of the periapical lesion.
DOI: 10.6084/m9.figshare.5668615.v1
title: Actinomycosis is not Frequent in the Periapex But is a Persistent Lesion

description: Abstract Periapical actinomycosis caused by a gram-positive anaerobic pathogen characterizes a typical extra-radicular infection. This study determined the frequency and correlated the content of bacteria colonies with the of periapical actinomycosis size. The study comprised a total of 218 periapical lesions (PL) (cysts, granulomas or abscess). The specimens embedded in paraffin were sliced into 4-µm sections and stained with hematoxylin-eosin, Gram, Periodic Acid-Schiff (PAS) and Grocott’s stain. The presence of bacterial colonies composed of filamentous structures labeled with the histochemical stains were described as Actinomyces, and for each case, the bacterial colonies were counted and measured. The correlation between the number and size of bacterial colonies and the size of PL was tested using Pearson’s adjusted correlation coefficient. From 218 PL, bacterial colonies were identified in 64 biopsies. Seven cases (0.3%) fulfill the criteria for diagnosis of periapical actinomycosis. All of cases were therapy-resistant and did not showed periapical repair after 12 months of follow-up. Periapical surgery or dental extraction was performed. The correlation test indicated no correlation between the number of bacterial colonies and the lesion size (p=0.752, r=-0.148). However, a larger bacterial colony size generally resulted in a larger periapical lesion (P=0.000, r=0.657). The frequency of periapical actinomycosis was low, and this lesion should be included in the differential diagnosis of PL. The size of the Actinomyces colonies seemed to contribute to increase the size of the periapical lesion.
DOI: 10.6084/m9.figshare.5668606
title: Factors associated with first sexual intercourse among mothers with 14-16 years of age from Porto Alegre/RS, Brazil

description: Abstract This study analyzed the factors associated with first sexual intercourse among 427 mothers with 14-16 years of age from Porto Alegre (RS), Brazil. Data on adolescent socio-demographic status (skin color, religion and schooling gap) and reproductive aspects (age at menarche, age at first sexual intercourse, partnership in first sexual intercourse and partner's age) were collected through household survey. Data analysis was performed using bivariate and multivariate analysis through Poisson regression with robust variance. Among adolescents with early first sexual intercourse (up to 14 years), 77.4% had menarche at up to 12 years of age and 16.4% had casual partners in the first sexual intercourse. These variables were associated with the outcome and showed that early menarche (OR=1.26; CI 95%:1.04-1.52) and casual partner at first sexual intercourse (OR=1.28; CI 95%:1.09-1.49) increase by respectively 26% and 28% the prevalence of early first sexual intercourse. This study highlights the need to strengthen health programs and policies already implemented, such as the School Health Program, as well as reinforces that parents and teachers need to be oriented in an integrated manner in order to facilitate dialogue with adolescents and provide adequate counseling.
DOI: 10.6084/m9.figshare.5668606.v1
title: Factors associated with first sexual intercourse among mothers with 14-16 years of age from Porto Alegre/RS, Brazil

description: Abstract This study analyzed the factors associated with first sexual intercourse among 427 mothers with 14-16 years of age from Porto Alegre (RS), Brazil. Data on adolescent socio-demographic status (skin color, religion and schooling gap) and reproductive aspects (age at menarche, age at first sexual intercourse, partnership in first sexual intercourse and partner's age) were collected through household survey. Data analysis was performed using bivariate and multivariate analysis through Poisson regression with robust variance. Among adolescents with early first sexual intercourse (up to 14 years), 77.4% had menarche at up to 12 years of age and 16.4% had casual partners in the first sexual intercourse. These variables were associated with the outcome and showed that early menarche (OR=1.26; CI 95%:1.04-1.52) and casual partner at first sexual intercourse (OR=1.28; CI 95%:1.09-1.49) increase by respectively 26% and 28% the prevalence of early first sexual intercourse. This study highlights the need to strengthen health programs and policies already implemented, such as the School Health Program, as well as reinforces that parents and teachers need to be oriented in an integrated manner in order to facilitate dialogue with adolescents and provide adequate counseling.
DOI: 10.6084/m9.figshare.5668603
title: Validity of self-reported weight, height, and BMI in mothers of the research Birth in Brazil

description: ABSTRACT OBJECTIVE To evaluate the accuracy of information on pre-gestational weight, height, pre-gestational body mass index, and weight at the last prenatal appointment, according to maternal characteristics and sociodemographic and prenatal variables. METHODS The study was developed using data from the face-to-face questionnaire and prenatal card (gold standard) of the study “Birth in Brazil, 2011–2012”. To evaluate the differences between the measured and self-reported anthropometric variables, we used the the Kruskal-Wallis test for the variables divided into quartiles. For the continuous variables, we used the Wilcoxon test, Bland-Altman plot, and average difference between the information measured and reported by the women. We estimated sensitivity and the intraclass correlation coefficient. RESULTS In the study, 17,093 women had the prenatal card. There was an underestimation of pre-gestational weight of 1.51 kg (SD = 3.44) and body mass index of 0.79 kg/m2 (SD = 1.72) and overestimation of height of 0.75 cm (SD = 3.03) and weight at the last appointment of 0.22 kg (SD = 2.09). The intraclass correlation coefficients (ICC) obtained for the anthropometric variables were: height (ICC = 0.89), pre-gestational weight (ICC = 0.96), pre-gestational body mass index (ICC = 0.92), and weight at the last appointment (ICC = 0.98). CONCLUSIONS The results suggest that the mentioned anthropometric variables were valid for the study population, and they may be used in studies of populations with similar characteristics.