cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.22578348
title: No-till broccoli production using different cover crop residues and nitrogen doses

description: ABSTRACT No-till vegetable farming is a feasible alternative to reduce erosion-induced losses and to increase soil nutrient availability, because cover crop residue protects the soil and its decomposition promotes nutrient cycling, which can improve the yield of the subsequent crop. The present study assessed the production and decomposition of cover crops and the agronomic performance of broccoli grown on this residue using different nitrogen doses in a no-till system. A randomized block design was used, in a split-split plot arrangement of main plots (cover crops), sub-plots (N doses) and sub-sub plots (decomposition times), with four repetitions. Seven cover crops were studied, as follows: [1) signal grass (SG); 2) sunn hemp (SH); 3) pearl millet (PM): 4) SG+SH; 5) SG+PM; 6) SH+PM and 7) SG+SH+PM]; in addition to four doses of nitrogen topdressing [T1) no N application (control); T2) 60 kg/ha N; T3) 90 kg/ha N and T4) 120 kg/ha N]; and five cover crop residue decomposition times: zero (cutting), 15, 30, 60 and 90 days after transplanting (DAT) the broccoli seedlings. Cover crop dry weight (DW) production, residue decomposition, and the head fresh (HFW) and dry weight (HDW) and yield (YLD) of broccoli were assessed. Among the cover crops, sunn hemp and the intercropped SG+SH treatment exhibited the lowest DW production and, along with signal grass, the shortest half-life (T½) and highest residue decomposition rate. The best-performing broccoli plants were those grown using PM, SH and a combination of both as cover crops. The highest broccoli production was obtained using sunn hemp residue, regardless of nitrogen topdressing, with HFW of 788 g/plant and YLD of 30 t/ha.
DOI: 10.6084/m9.figshare.22578348.v1
title: No-till broccoli production using different cover crop residues and nitrogen doses

description: ABSTRACT No-till vegetable farming is a feasible alternative to reduce erosion-induced losses and to increase soil nutrient availability, because cover crop residue protects the soil and its decomposition promotes nutrient cycling, which can improve the yield of the subsequent crop. The present study assessed the production and decomposition of cover crops and the agronomic performance of broccoli grown on this residue using different nitrogen doses in a no-till system. A randomized block design was used, in a split-split plot arrangement of main plots (cover crops), sub-plots (N doses) and sub-sub plots (decomposition times), with four repetitions. Seven cover crops were studied, as follows: [1) signal grass (SG); 2) sunn hemp (SH); 3) pearl millet (PM): 4) SG+SH; 5) SG+PM; 6) SH+PM and 7) SG+SH+PM]; in addition to four doses of nitrogen topdressing [T1) no N application (control); T2) 60 kg/ha N; T3) 90 kg/ha N and T4) 120 kg/ha N]; and five cover crop residue decomposition times: zero (cutting), 15, 30, 60 and 90 days after transplanting (DAT) the broccoli seedlings. Cover crop dry weight (DW) production, residue decomposition, and the head fresh (HFW) and dry weight (HDW) and yield (YLD) of broccoli were assessed. Among the cover crops, sunn hemp and the intercropped SG+SH treatment exhibited the lowest DW production and, along with signal grass, the shortest half-life (T½) and highest residue decomposition rate. The best-performing broccoli plants were those grown using PM, SH and a combination of both as cover crops. The highest broccoli production was obtained using sunn hemp residue, regardless of nitrogen topdressing, with HFW of 788 g/plant and YLD of 30 t/ha.
DOI: 10.6084/m9.figshare.22578349
title: A GREEN AND RELIABLE TITRIMETRIC METHOD FOR TOTAL ORGANIC CARBON DETERMINATION WITH POTASSIUM PERMANGANATE

description: The determination of total organic carbon in soils, fertilizers, sewage sludge, sediments, and humic extracts is widely performed by chemical oxidation methods with K2Cr2O7. The Yeomans-Bremner (YB) method is currently the one that stands out the most. The drawback of these methods is the large amount of concentrated H2SO4 used, which generates a large amount of hazardous waste. This work proposes using KMnO4 as an alternative to K2Cr2O7 for a lower consumption of H2SO4. The method uses the back titration of Fe2+ added to consume both the MnO2 produced and the excess KMnO4 that was not consumed in the OM oxidation. A non-trivial and yet not explored stoichiometry was applied for this purpose, providing a success not yet achieved in using permanganate to determine TOC by titration. The ideal condition for the oxidation of OC was determined by the analysis of a potassium hydrogen phthalate standard and involved the use of 0.125 mol L-1 H2SO4 and temperature of 70 °C, obtaining a significant advantage over the YB method (concentrated H2SO4 and 170 °C). The proposed method was applied to the analysis of soil samples, producing conversion factors for soil organic carbon that varied between 0.652 and 1.12.
DOI: 10.6084/m9.figshare.22578349.v1
title: A GREEN AND RELIABLE TITRIMETRIC METHOD FOR TOTAL ORGANIC CARBON DETERMINATION WITH POTASSIUM PERMANGANATE

description: The determination of total organic carbon in soils, fertilizers, sewage sludge, sediments, and humic extracts is widely performed by chemical oxidation methods with K2Cr2O7. The Yeomans-Bremner (YB) method is currently the one that stands out the most. The drawback of these methods is the large amount of concentrated H2SO4 used, which generates a large amount of hazardous waste. This work proposes using KMnO4 as an alternative to K2Cr2O7 for a lower consumption of H2SO4. The method uses the back titration of Fe2+ added to consume both the MnO2 produced and the excess KMnO4 that was not consumed in the OM oxidation. A non-trivial and yet not explored stoichiometry was applied for this purpose, providing a success not yet achieved in using permanganate to determine TOC by titration. The ideal condition for the oxidation of OC was determined by the analysis of a potassium hydrogen phthalate standard and involved the use of 0.125 mol L-1 H2SO4 and temperature of 70 °C, obtaining a significant advantage over the YB method (concentrated H2SO4 and 170 °C). The proposed method was applied to the analysis of soil samples, producing conversion factors for soil organic carbon that varied between 0.652 and 1.12.
DOI: 10.6084/m9.figshare.22578358.v1
title: Soil solution and rice nutrition under liming and water management in a soil from Amazonian natural fields

description: ABSTRACT Soils of natural grasslands in the Amazon region play an essential role in local food production and preservation of the Amazon rainforest. However, in general, these soils have high acidity, which limits irrigated rice production. The objective of this study was to evaluate the effect of liming and irrigation management on the dynamics of soil reduction, nutrients in the soil solution, nutrition, and aboveground plant biomass in natural fields soil in southern Amazonia, Brazil. The experiment evaluated the correction factors for soil acidity and irrigation management, flooded and saturated soil. The experiment was carried in pots in a greenhouse. Liming reduced the Eh of the soil and had a higher influence than the soil irrigation condition. Liming also had a higher influence on soil pH than irrigation conditions. Liming and saturated soil had the lowest Fe content in the soil solution. Higher Ca and Mg contents were observed in the soil solution under liming and flood irrigation. Thus, liming is an essential strategy to improve chemical conditions for plant development in the soil of natural Amazonian grasslands and can be used in conjunction with saturated irrigation, which is more efficient in using water and reduces the effects of iron toxicity.
DOI: 10.6084/m9.figshare.22578358
title: Soil solution and rice nutrition under liming and water management in a soil from Amazonian natural fields

description: ABSTRACT Soils of natural grasslands in the Amazon region play an essential role in local food production and preservation of the Amazon rainforest. However, in general, these soils have high acidity, which limits irrigated rice production. The objective of this study was to evaluate the effect of liming and irrigation management on the dynamics of soil reduction, nutrients in the soil solution, nutrition, and aboveground plant biomass in natural fields soil in southern Amazonia, Brazil. The experiment evaluated the correction factors for soil acidity and irrigation management, flooded and saturated soil. The experiment was carried in pots in a greenhouse. Liming reduced the Eh of the soil and had a higher influence than the soil irrigation condition. Liming also had a higher influence on soil pH than irrigation conditions. Liming and saturated soil had the lowest Fe content in the soil solution. Higher Ca and Mg contents were observed in the soil solution under liming and flood irrigation. Thus, liming is an essential strategy to improve chemical conditions for plant development in the soil of natural Amazonian grasslands and can be used in conjunction with saturated irrigation, which is more efficient in using water and reduces the effects of iron toxicity.
DOI: 10.6084/m9.figshare.22578363
title: Scribbling and doodling: social representations by children expressed in drawings, regarding the experience of blood sampling

description: Abstract The scope of this article was to identify the social representations of children in a municipal public school in Rio de Janeiro, with respect to the blood sampling procedure and to discuss the social representations that emerge, in the light of the performance of the family health team in carrying out this procedure. Moscovisci’s method/theory of analysis of social representations based on a qualitative approach was used. For data collection, the projective technique of the esthetic production scene and the student’s speech was used. The results were grouped into four categories: 1) structural dimensions involved in the blood sampling procedure; 2) dimension of the human component and its interface in the blood sampling procedure; 3) the psycho-emotional dimension portrayed in the blood sampling procedure; and 4) blood sampling: the importance for student health. With respect to the importance of blood sampling, we highlight the perception of students regarding the importance of actions aimed at prevention and health care promotion.
DOI: 10.6084/m9.figshare.22578363.v1
title: Scribbling and doodling: social representations by children expressed in drawings, regarding the experience of blood sampling

description: Abstract The scope of this article was to identify the social representations of children in a municipal public school in Rio de Janeiro, with respect to the blood sampling procedure and to discuss the social representations that emerge, in the light of the performance of the family health team in carrying out this procedure. Moscovisci’s method/theory of analysis of social representations based on a qualitative approach was used. For data collection, the projective technique of the esthetic production scene and the student’s speech was used. The results were grouped into four categories: 1) structural dimensions involved in the blood sampling procedure; 2) dimension of the human component and its interface in the blood sampling procedure; 3) the psycho-emotional dimension portrayed in the blood sampling procedure; and 4) blood sampling: the importance for student health. With respect to the importance of blood sampling, we highlight the perception of students regarding the importance of actions aimed at prevention and health care promotion.
DOI: 10.6084/m9.figshare.22578366
title: Theorization about the limits to the inclusion of oral health teams in the Family Health Strategy

description: Abstract This study aimed to theorize, by means of social actors’ conception, about the reasons for the non-inclusion of oral health in the Family Health Strategy (FHS) in the city of Juiz de Fora, Minas Gerais, Brazil. This is a qualitative, exploratory, descriptive, and analytical study based on the grounded theory methodology and the National Oral Health Policy. Eleven interviews were performed with public managers, delegates who participate in the municipal health council, and dental surgeons who belong to the public health service. The theorization of the study was created through the data analysis process, which resulted in “a consequence of the dominant disease-centered oral health care model” as the main category. Data were categorized according to a methodological framework. The health concept set forth by local social actors contributed to the non-inclusion of oral healthcare teams (OHTs) in the FHS. This theorization identified the origins of the studied phenomenon and can aid in future policy decision-making carried out by local social actors.
DOI: 10.6084/m9.figshare.22578366.v1
title: Theorization about the limits to the inclusion of oral health teams in the Family Health Strategy

description: Abstract This study aimed to theorize, by means of social actors’ conception, about the reasons for the non-inclusion of oral health in the Family Health Strategy (FHS) in the city of Juiz de Fora, Minas Gerais, Brazil. This is a qualitative, exploratory, descriptive, and analytical study based on the grounded theory methodology and the National Oral Health Policy. Eleven interviews were performed with public managers, delegates who participate in the municipal health council, and dental surgeons who belong to the public health service. The theorization of the study was created through the data analysis process, which resulted in “a consequence of the dominant disease-centered oral health care model” as the main category. Data were categorized according to a methodological framework. The health concept set forth by local social actors contributed to the non-inclusion of oral healthcare teams (OHTs) in the FHS. This theorization identified the origins of the studied phenomenon and can aid in future policy decision-making carried out by local social actors.
DOI: 10.6084/m9.figshare.22578369
title: STUDY OF PREMIUM AND REGULAR GASOLINES MARKETED IN BRAZIL THROUGH THE ERETIC-NMR METHOD AND CHEMOMETRICS

description: Gasoline is a complex mixture of hydrocarbons whose detailed study of its chemical profiles is a challenging task. This type of product of great commercial importance has its quality measured in Brazil from classical physical-chemical tests. Although robust, physical-chemical analyses generally require large amounts of assays, solvents, and samples, in addition to not being indicated for the detection of small compositional changes. In this work, NMR and chemometrics were used in the quantitative study of different samples of gasoline with varying ratings of octane and ethanol contents. The results demonstrated the usefulness of NMR spectroscopy both to characterize as well as to distinguish the chemical profiles of regular and premium gasoline. With the application of the ERETIC, the chemical profiles mentioned were quantitatively differentiated and the proportions between hydrocarbons were determined for both types of gasoline. The application of the ERETIC was also successful in the quantitative determination of ethanol contents in regular and premium gasoline. The aforementioned method, which dispenses with the use of quantification standards inserted directly into the sample of interest, was unequivocal in accounting for the volume of ethanol, in addition to showing excellent agreement with the method currently adopted by the Brazilian government.
DOI: 10.6084/m9.figshare.22578369.v1
title: STUDY OF PREMIUM AND REGULAR GASOLINES MARKETED IN BRAZIL THROUGH THE ERETIC-NMR METHOD AND CHEMOMETRICS

description: Gasoline is a complex mixture of hydrocarbons whose detailed study of its chemical profiles is a challenging task. This type of product of great commercial importance has its quality measured in Brazil from classical physical-chemical tests. Although robust, physical-chemical analyses generally require large amounts of assays, solvents, and samples, in addition to not being indicated for the detection of small compositional changes. In this work, NMR and chemometrics were used in the quantitative study of different samples of gasoline with varying ratings of octane and ethanol contents. The results demonstrated the usefulness of NMR spectroscopy both to characterize as well as to distinguish the chemical profiles of regular and premium gasoline. With the application of the ERETIC, the chemical profiles mentioned were quantitatively differentiated and the proportions between hydrocarbons were determined for both types of gasoline. The application of the ERETIC was also successful in the quantitative determination of ethanol contents in regular and premium gasoline. The aforementioned method, which dispenses with the use of quantification standards inserted directly into the sample of interest, was unequivocal in accounting for the volume of ethanol, in addition to showing excellent agreement with the method currently adopted by the Brazilian government.
DOI: 10.6084/m9.figshare.22578370
title: Identification of key genes in bovine mammary epithelial cells challenged with Escherichia coli and Staphylococcus aureus by integrated bioinformatics analysis

description: ABSTRACT This study integrated four microarray datasets by Robust Rank Aggregation (RRA) method to identify the differentially expressed genes (DEG) in bovine mammary epithelial (BME) cells in response to Escherichia coli and Staphylococcus aureus infection. Furthermore, the GO function and KEGG pathway enrichment analysis of the integrated DEG were performed. Finally, the protein-protein interaction (PPI) network was constructed. A total of 72 integrated DEG were identified from the four datasets. The most significantly enriched terms within the integrated DEG were mainly involved in the immune response. The PPI network of DEG was constructed with 53 nodes. Seventeen genes, which constitute a significant module, were identified as hub genes. Among them, CD40, CXCL6, and NFKBIZ were further screened as the key genes and have the potential to become biomarkers of E. coli and S. aureus mastitis, considering the specificity of biomarkers for diseases. The identified key genes and pathways in this study can assist in the search for biomarkers for mastitis diagnosis and disease resistance breeding.
DOI: 10.6084/m9.figshare.22578370.v1
title: Identification of key genes in bovine mammary epithelial cells challenged with Escherichia coli and Staphylococcus aureus by integrated bioinformatics analysis

description: ABSTRACT This study integrated four microarray datasets by Robust Rank Aggregation (RRA) method to identify the differentially expressed genes (DEG) in bovine mammary epithelial (BME) cells in response to Escherichia coli and Staphylococcus aureus infection. Furthermore, the GO function and KEGG pathway enrichment analysis of the integrated DEG were performed. Finally, the protein-protein interaction (PPI) network was constructed. A total of 72 integrated DEG were identified from the four datasets. The most significantly enriched terms within the integrated DEG were mainly involved in the immune response. The PPI network of DEG was constructed with 53 nodes. Seventeen genes, which constitute a significant module, were identified as hub genes. Among them, CD40, CXCL6, and NFKBIZ were further screened as the key genes and have the potential to become biomarkers of E. coli and S. aureus mastitis, considering the specificity of biomarkers for diseases. The identified key genes and pathways in this study can assist in the search for biomarkers for mastitis diagnosis and disease resistance breeding.
DOI: 10.6084/m9.figshare.22578375
title: Building social networks in the destination country: experiences of Venezuelans, Colombians and Spaniards in a medium-sized city in Chile

description: Abstract This article analyzes international immigrants’ construction of social networks in the country of destination, and the characteristics of these networks according to the country of origin. The case of three groups residing in Chile is studied through a qualitative methodological design based on semi-structured interviews, examined by means of narrative analysis. Results show that those who adapt more easily and quickly to the place of destination tend to establish networks with weak ties. Conversely, those who have more difficulties in adapting to the place of destination, or do so only partially, tend to establish closed, tightly-knit cultural networks.
DOI: 10.6084/m9.figshare.22578375.v1
title: Building social networks in the destination country: experiences of Venezuelans, Colombians and Spaniards in a medium-sized city in Chile

description: Abstract This article analyzes international immigrants’ construction of social networks in the country of destination, and the characteristics of these networks according to the country of origin. The case of three groups residing in Chile is studied through a qualitative methodological design based on semi-structured interviews, examined by means of narrative analysis. Results show that those who adapt more easily and quickly to the place of destination tend to establish networks with weak ties. Conversely, those who have more difficulties in adapting to the place of destination, or do so only partially, tend to establish closed, tightly-knit cultural networks.
DOI: 10.6084/m9.figshare.22578376
title: SEMICARBAZONES: INTERDISCIPLINARY APPROACH IN EXPERIMENTAL CLASSES OF ORGANIC CHEMISTRY AND MEDICINAL CHEMISTRY

description: Considering the chemical and pharmacological properties of semicarbazones, an interdisciplinary didactic sequence was developed to be applied in experimental classes of undergraduate courses in Pharmacy, Chemistry and related areas. This didactic sequence was planned in three steps, starting from the planning of the target molecule, a semicarbazone derived from helional, to its synthesis, physicochemical characterization (CCD, melting point, FTIR and UV-Vis) and in silico tests of its pharmacokinetic properties using the free software ADMETlab 2.0. The proposed target molecule has as molecular scaffold the 1,3-benzodiaxole nucleus and the semicarbazone function, aiming to obtain a molecule with promising anticonvulsant action and that can be obtained by a low cost and easy to execute methodology, which makes it attractive for use in experimental classes. Thus, the application of this didactic sequence aims to provide undergraduate students the opportunity to experience the process of drug development, applying techniques for planning, synthesis, characterization, and pharmacokinetic evaluation in silico. Besides reinforcing the interdisciplinary teaching of Medicinal Chemistry, applying in an integrated way the theoretical and practical knowledge of the disciplines of Organic Chemistry, Physical Chemistry, Pharmacology and Computational Chemistry.