cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.8091548.v1
title: Permineralized conifer-like leaves from the Jurassic of Patagonia (Argentina) and its paleoenvironmental implications

description: Abstract Abstract: Anatomically preserved conifer-like leaves from the Middle Jurassic La Matilde Formation at the Barda Blanca locality in the Gran Bajo de San Julián area, southern Patagonia are described here. Leaves are assigned to conifers based on the following foliar features: thick-walled epidermal cells, a sclerenchymatic hypodermis, resin canals and transfusion tracheids associated with the vascular bundle. General mesophyll anatomy and inferred foliar morphology suggest a similarity to large, broad, linear-lanceolate, multi-veined conifer-like leaves. The general foliar habit indicates an affinity with the large, multi-veined leaves of the Araucariaceae; especially with those exhibited by the species of the Araucaria sections, Araucaria and Bunya. Anatomically, the permineralized leaves exhibit xeromorphic foliar features, including thick-walled epidermal cells, an isobilateral mesophyll with well-developed palisade cells and mechanical tissue. The general leaf anatomy shown by the Patagonian specimens along with sedimentological data may suggest that during the deposition of the La Matilde Formation at the Barda Blanca locality, the parent plant was well adapted to the environmental conditions, which probably consisted of a high light intensity with an adequate quantity of water in the soil, which increased the maximum leaf conductance of CO2.
DOI: 10.6084/m9.figshare.8091530
title: Who can the school count on? The coproduction of public education by students’ families

description: Abstract This article discusses the coproduction of public education by student’s families and how it is influenced by the family members’ profile. Interviews were conducted with ten school principals, with sampling and analysis based on theoretical saturation, and a survey with 269 family members from Distrito Federal, using logistic regression as the data analysis methodology. From this, all categories of coproduction identified in Europe by Pestoff (2006) were confirmed, and another raised from the interviews, the coproduction by basic family support. Additionally, the data analysis showed significant influence of the families’ level of education and their family habits on pedagogy, social, political and economic coproduction. The research highlighted the coproduction of public services by citizen in developing countries.
DOI: 10.6084/m9.figshare.8091536
title: Adipokine gene variability and plasma levels in patients with chronic periodontitis -a case-control study

description: Abstract: Specific variants in genes that encode adipokines and their mRNA and protein expression were previously studied in type 2 diabetes mellitus (T2DM) and obesity, and similar studies have been performed for chronic periodontitis (CP). The aim of this case–control study was to investigate the possible impacts of adiponectin (ADIPOQ), leptin (LEP) and its receptor (LEPR), and resistin (RETN) on the etiopathogenesis of CP. Examinations were performed on 118 non–periodontitis healthy subjects (healthy controls, HC), 205 healthy individuals with CP (H + CP) and 86 type 2 diabetes patients with CP (T2DM + CP). Variants within the ADIPOQ (rs2241766, rs1501299), LEP (rs13228377, rs2167270), LEP receptor (rs1805096), and RETN (rs1862513) genes were determined by qPCR. In addition, the plasma levels of ADIPOQ, LEP, and RETN were analysed by ELISA for 80 individuals. The genotype frequencies of the SNP ADIPOQ +45G/T (rs2241766) differed between the HC and H + CP groups (p=0.03, pcorr&gt;0.05), and carriers of the TT genotype had a lower risk of developing CP compared to carriers of the GG or TG genotypes (p&lt;0.01, pcorr&gt;0.05). However, there were no significant differences in the plasma levels of ADIPOQ, LEP or RETN between the study groups (p &gt; 0.05). Plasma levels of the adipokines were also independent of the gene profiles (p &gt; 0.05). Adipokine plasma levels did not change in patients with H + CP/T2DM + CP compared to HC, but we did identify a specific polymorphism in the ADIPOQ gene that was associated with CP. Although the ADIPOQ +45G/T (rs2241766) gene variant may be a candidate biomarker for CP, further research is required in larger populations with different ethnic backgrounds before any final conclusions can be drawn about the role of this gene in CP.
DOI: 10.6084/m9.figshare.8091530.v1
title: Who can the school count on? The coproduction of public education by students’ families

description: Abstract This article discusses the coproduction of public education by student’s families and how it is influenced by the family members’ profile. Interviews were conducted with ten school principals, with sampling and analysis based on theoretical saturation, and a survey with 269 family members from Distrito Federal, using logistic regression as the data analysis methodology. From this, all categories of coproduction identified in Europe by Pestoff (2006) were confirmed, and another raised from the interviews, the coproduction by basic family support. Additionally, the data analysis showed significant influence of the families’ level of education and their family habits on pedagogy, social, political and economic coproduction. The research highlighted the coproduction of public services by citizen in developing countries.
DOI: 10.6084/m9.figshare.8091533.v1
title: Effects of astragaloside IV on inflammation and immunity in rats with experimental periodontitis

description: Abstract: This study aimed to investigate the effects of astragaloside IV (AsIV) on inflammation and immunity in rats with experimental periodontitis. Periodontitis was established in 48 Wistar rats, which were then randomly divided into model and 10, 20 and 40 mg/kg AsIV groups, with 12 rats in each group. The latter 3 groups were treated with AsIV at doses of 10, 20 and 40 mg/kg, respectively. The control group (12 rats, without periodontitis) and model group were given the same amount of 5% sodium carboxymethyl cellulose. The treatment was performed once per day for 8 weeks. Before and after treatment, the tooth mobility scores of the rats were determined. After treatment, the salivary occult blood index (SOBI), plaque index (PLI), peripheral blood T lymphocyte subsets, and serum inflammatory factor and immunoglobulin levels were determined. The results showed that, after treatment, compared with that in model group, in 40 mg/kg AsIV group, the general state of rats was improved, while the tooth mobility score, SOBI and PLI were significantly decreased (p &lt; 0.05); the peripheral blood CD4+ T cell percentage and CD4+/CD8+ ratio were significantly increased (p &lt; 0.05), while the CD8+ T cell percentage was significantly decreased (p &lt; 0.05); the serum tumor necrosis factor-α, interleukin-1β and interleukin-2 levels were significantly decreased (p &lt; 0.05); the serum immunoglobulin A and immunoglobulin G levels were significantly decreased (p &lt; 0.05). In conclusion, AsIV can alleviate inflammation and enhance immunity in rats with experimental periodontitis.
DOI: 10.6084/m9.figshare.8091539.v1
title: Surface morphologic evaluation of orthodontic bonding systems under conditions of cariogenic challenge

description: Abstract: Orthodontic bonding systems are submitted to demineralization and remineralization dynamics that might compromise their surface smoothness, and favor biofilm aggregation and caries development. The aim of the present study was to evaluate the effects of a cariogenic challenge model (in vitro pH-cycling model) on the surface roughness and topography of 3 bonding materials: Transbond™ XT (XT), Transbond™ Plus Color Change (PLUS) and Fuji Ortho™ LC (FUJI), by means of Atomic Force Microscopy (AFM). Six specimens with standardized dimensions and surface smoothness were fabricated per group, and the materials were manipulated in accordance with the manufacturers' instructions. No polishing was necessary. AFM tests were performed before and after pH-cycling, taking 3 readouts per specimen. The roughness results (Ra) were obtained at nanometric levels (nm) and surface records were acquired in two- and three-dimensional images of height and lock-in phase of the material components. The surfaces of all groups analyzed in the study were morphologically altered, presenting images suggestive of matrix degradation and loss of matrix-load integrity. FUJI presented the greatest increase in surface roughness, followed by XT and PLUS, respectively (p≤0.001). Nevertheless, the roughness values found did not present sufficient degradation to harbor bacteria. The surface roughness of all tested materials was increased by pH-cycling. The use of materials capable of resisting degradation in the oral environment is recommended, in order to conserve their integrity and of the surrounding tissues.
DOI: 10.6084/m9.figshare.8091512
title: Study of Cellulose Nanocrystals and Zinc Nitrate Hexahydrate Addition in Chitosan Hydrogels

description: In this study, chitosan hydrogels were produced with 0, 2, 4 and 6 wt% of cellulose nanocrystals (CNC) using hexahydrate zinc nitrate (Zn(NO3)2.6H2O) as a catalyst for chitosan crosslinking reaction. CNC´s size was estimated by dynamic light scattering (DLS) and surface charge by zeta potential. Hydrogels were characterized by rotational rheometer, swelling test, uniaxial compression test, in vitro degradation, scanning electron microscopy (SEM) and microtomography. Results showed that zinc nitrate and CNC addition did not influence mechanical properties, degradation, and morphology of the hydrogels. However, zinc nitrate decreased 36.54% of the gel time and 41.37% of the swelling degree, and increased the crosslinking degree of the chitosan hydrogels, proving not only its catalytic effect but also its participation in the crosslinking reaction. Porosity was slightly reduced after addition of zinc nitrate and incorporation of CNC. In the mechanism of crosslinking reaction, a competition between CNC and zinc nitrate was observed.
DOI: 10.6084/m9.figshare.8091518
title: NUTRIENT AND ORGANIC CARBON RELEASE IN SOILS CONTAINING WASHED AND NOT WASHED HYDROCHAR COMPARED TO ANTHROPOGENIC SOILS

description: Hydrochar washed (1.0, 2.5, 5.0 and 10.0 %) and not washed (10.0%) produced by hydrothermal carbonization using vinasse and sugarcane bagasse was applied in sand, ultisol and oxisol columns, and the release of NO3-, Orthophosphate, SO42-, Total Organic Carbon (TOC), H+ were evaluated for 30 days. These results were compared with the release of these parameters from experiments conducted with anthropogenic soils. The results demonstrated that higher amounts of nutrients were released for the experiments conducted with hydrochar not washed. With higher rates of hydrochar washed, higher the amount of nutrients released. TOC and SO42- were released throughout the experiment, which is beneficial from the agricultural point of view. Low values of orthophosphate and nitrate release in the leachates were observed for ultisol and oxisol due to the clay and iron and manganese oxides contents. Principal components analysis confirmed the observations and demonstrated that SO42- and TOC preferentially influence the oxisol, being that nitrate and pH influenced the columns containing Terra Mulata and sand. The results allow to conclude that it is possible to adjust the application rate of hydrochar in soils with lower fertility in order to increase it as observed for anthropogenic soils.
DOI: 10.6084/m9.figshare.8091524
title: The perception of childhood educators about food and nutrition education

description: Abstract: The objective of this paper is to address the perceptions about feeding and nutrition of educators in children’s education in the city of Água Boa, Minas Gerais, following a qualitative approach and based on the theory of social representations. All educators are female, and 86% of them have completed higher education. They consider food and nutritional education (EAN) important for the promotion of healthy eating habits among children. Their knowledge about EAN is based on the biological aspects of food, while cultural, social and educators do not recognize psychological aspects. The conclusion is that work needs to be carried out with this group on the existence of other dimensions of EAN, through the valuing of food culture and the local food production system. It is necessary to encourage the participation of these educators in the school community, as well as to work on the theme of EAN in a transversal manner.
DOI: 10.6084/m9.figshare.8091515
title: Use of interactive platforms and new technologies in the radiation physics teaching for health area courses

description: Abstract The research presents the difficulty that students of the health areas face to understanding concepts of Radiation Physics and their applicability. The use of innovative and technological tools and methods associated with theoretical concepts favors the teaching learning process. The research describes results that show changes that are perceived in students during and after the use of the tools and demonstrate the student's position as an active subject in the teaching learning process. From a movement of transformation of the disciplinary structures, it is evident the correlation between the search of greater active and critical participation of the students when one has a dynamism in the classes. It was concluded that the advantages in terms of achievement, academic performance and student satisfaction involved when compared to traditional teaching methods were approximately 93% acceptance, which expresses a significant increase in students' performance and the good acceptance of such methodologies. It is also verified the satisfaction of the teacher, who begins to stimulate more students, to exercise several mental activities of the students in new proposals, allowing them to assimilate and build new knowledge, developing critical thinking.
DOI: 10.6084/m9.figshare.8091518.v1
title: NUTRIENT AND ORGANIC CARBON RELEASE IN SOILS CONTAINING WASHED AND NOT WASHED HYDROCHAR COMPARED TO ANTHROPOGENIC SOILS

description: Hydrochar washed (1.0, 2.5, 5.0 and 10.0 %) and not washed (10.0%) produced by hydrothermal carbonization using vinasse and sugarcane bagasse was applied in sand, ultisol and oxisol columns, and the release of NO3-, Orthophosphate, SO42-, Total Organic Carbon (TOC), H+ were evaluated for 30 days. These results were compared with the release of these parameters from experiments conducted with anthropogenic soils. The results demonstrated that higher amounts of nutrients were released for the experiments conducted with hydrochar not washed. With higher rates of hydrochar washed, higher the amount of nutrients released. TOC and SO42- were released throughout the experiment, which is beneficial from the agricultural point of view. Low values of orthophosphate and nitrate release in the leachates were observed for ultisol and oxisol due to the clay and iron and manganese oxides contents. Principal components analysis confirmed the observations and demonstrated that SO42- and TOC preferentially influence the oxisol, being that nitrate and pH influenced the columns containing Terra Mulata and sand. The results allow to conclude that it is possible to adjust the application rate of hydrochar in soils with lower fertility in order to increase it as observed for anthropogenic soils.
DOI: 10.6084/m9.figshare.8091524.v1
title: The perception of childhood educators about food and nutrition education

description: Abstract: The objective of this paper is to address the perceptions about feeding and nutrition of educators in children’s education in the city of Água Boa, Minas Gerais, following a qualitative approach and based on the theory of social representations. All educators are female, and 86% of them have completed higher education. They consider food and nutritional education (EAN) important for the promotion of healthy eating habits among children. Their knowledge about EAN is based on the biological aspects of food, while cultural, social and educators do not recognize psychological aspects. The conclusion is that work needs to be carried out with this group on the existence of other dimensions of EAN, through the valuing of food culture and the local food production system. It is necessary to encourage the participation of these educators in the school community, as well as to work on the theme of EAN in a transversal manner.
DOI: 10.6084/m9.figshare.8091536.v1
title: Adipokine gene variability and plasma levels in patients with chronic periodontitis -a case-control study

description: Abstract: Specific variants in genes that encode adipokines and their mRNA and protein expression were previously studied in type 2 diabetes mellitus (T2DM) and obesity, and similar studies have been performed for chronic periodontitis (CP). The aim of this case–control study was to investigate the possible impacts of adiponectin (ADIPOQ), leptin (LEP) and its receptor (LEPR), and resistin (RETN) on the etiopathogenesis of CP. Examinations were performed on 118 non–periodontitis healthy subjects (healthy controls, HC), 205 healthy individuals with CP (H + CP) and 86 type 2 diabetes patients with CP (T2DM + CP). Variants within the ADIPOQ (rs2241766, rs1501299), LEP (rs13228377, rs2167270), LEP receptor (rs1805096), and RETN (rs1862513) genes were determined by qPCR. In addition, the plasma levels of ADIPOQ, LEP, and RETN were analysed by ELISA for 80 individuals. The genotype frequencies of the SNP ADIPOQ +45G/T (rs2241766) differed between the HC and H + CP groups (p=0.03, pcorr&gt;0.05), and carriers of the TT genotype had a lower risk of developing CP compared to carriers of the GG or TG genotypes (p&lt;0.01, pcorr&gt;0.05). However, there were no significant differences in the plasma levels of ADIPOQ, LEP or RETN between the study groups (p &gt; 0.05). Plasma levels of the adipokines were also independent of the gene profiles (p &gt; 0.05). Adipokine plasma levels did not change in patients with H + CP/T2DM + CP compared to HC, but we did identify a specific polymorphism in the ADIPOQ gene that was associated with CP. Although the ADIPOQ +45G/T (rs2241766) gene variant may be a candidate biomarker for CP, further research is required in larger populations with different ethnic backgrounds before any final conclusions can be drawn about the role of this gene in CP.
DOI: 10.6084/m9.figshare.8091503
title: Physics textbooks – what features students most value?

description: Abstract The textbook as object of study is supported both in its financial aspect, half billion dollars are annually invested in the PNLD (The Brazilian program to select and buy textbook), and in its pedagogical discussion of use and role in school culture. Therefore, this article aims to identify, in the opinion of Brazilian high school students, the most and least important features of Physics textbooks. For this purpose, a cross-sectional survey was conducted, with questions based on previous qualitative studies. The data was collected through questionnaires answered by 374 students from five regions in Brazil. Using descriptive statistical tools and hypothesis tests, the interests were ranked and the responses of different subgroups were compared. The students' desire is for a textbook with correct concepts, summaries and diagrams that allow easy identification of the key concepts, but also with themes and approaches that arouse interest and exemplify the content. However, there are many differences in responses among sample subsets, especially in the type of school (public or private) and gender. Differences among Brazilian regions also allow us to question the validity of a standardized textbook for the whole country, without regard to local specificities.
DOI: 10.6084/m9.figshare.8091509
title: The influence of Aloe vera with mesenchymal stem cells from dental pulp on bone regeneration: characterization and treatment of non-critical defects of the tibia in rats

description: Abstract Objective This study aimed to evaluate the inflammatory effect and bone formation in sterile surgical failures after implantation of a collagen sponge with mesenchymal stem cells from human dental pulp (hDPSCs) and Aloe vera. Material and Methods Rattus norvegicus (n=75) were divided into five experimental groups according to treatment: G1) control (blood clot); G2) Hemospon®; G3) Hemospon® in a culture medium enriched with 8% Aloe vera; G4) Hemospon® in a culture medium containing hDPSCs and G5) Hemospon® in a culture medium enriched with 8% Aloe vera and hDPSCs. On days 7, 15 and 30, the animals were euthanized, and the tibia was dissected for histological, immunohistochemistry and immunofluorescence analyses. The results were analyzed using nonparametric Kruskal-Wallis test and Dunn’s post-test. Results On days 7 and 15, the groups with Aloe vera had less average acute inflammatory infiltrate compared to the control group and the group with Hemospon® (p&lt;0.05). No statistically significant difference was found between the groups regarding bone formation at the three experimental points in time. Osteopontin expression corroborated the intensity of bone formation. Fluorescence microscopy revealed positive labeling with Q-Tracker® in hDPSCs before transplantation and tissue repair. Conclusion The results suggest that the combination of Hemospon®, Aloe vera and hDPSCs is a form of clinical treatment for the repair of non-critical bone defects that reduces the inflammatory cascade’s effects.
DOI: 10.6084/m9.figshare.8091512.v1
title: Study of Cellulose Nanocrystals and Zinc Nitrate Hexahydrate Addition in Chitosan Hydrogels

description: In this study, chitosan hydrogels were produced with 0, 2, 4 and 6 wt% of cellulose nanocrystals (CNC) using hexahydrate zinc nitrate (Zn(NO3)2.6H2O) as a catalyst for chitosan crosslinking reaction. CNC´s size was estimated by dynamic light scattering (DLS) and surface charge by zeta potential. Hydrogels were characterized by rotational rheometer, swelling test, uniaxial compression test, in vitro degradation, scanning electron microscopy (SEM) and microtomography. Results showed that zinc nitrate and CNC addition did not influence mechanical properties, degradation, and morphology of the hydrogels. However, zinc nitrate decreased 36.54% of the gel time and 41.37% of the swelling degree, and increased the crosslinking degree of the chitosan hydrogels, proving not only its catalytic effect but also its participation in the crosslinking reaction. Porosity was slightly reduced after addition of zinc nitrate and incorporation of CNC. In the mechanism of crosslinking reaction, a competition between CNC and zinc nitrate was observed.
DOI: 10.6084/m9.figshare.8091503.v1
title: Physics textbooks – what features students most value?

description: Abstract The textbook as object of study is supported both in its financial aspect, half billion dollars are annually invested in the PNLD (The Brazilian program to select and buy textbook), and in its pedagogical discussion of use and role in school culture. Therefore, this article aims to identify, in the opinion of Brazilian high school students, the most and least important features of Physics textbooks. For this purpose, a cross-sectional survey was conducted, with questions based on previous qualitative studies. The data was collected through questionnaires answered by 374 students from five regions in Brazil. Using descriptive statistical tools and hypothesis tests, the interests were ranked and the responses of different subgroups were compared. The students' desire is for a textbook with correct concepts, summaries and diagrams that allow easy identification of the key concepts, but also with themes and approaches that arouse interest and exemplify the content. However, there are many differences in responses among sample subsets, especially in the type of school (public or private) and gender. Differences among Brazilian regions also allow us to question the validity of a standardized textbook for the whole country, without regard to local specificities.