cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.11351252
title: Mathematical modeling in the initial years as a perspective for mathematics teaching: a brief history of Brazilian publications in journals (from 2009 to 2018)

description: ABSTRACT This article presents an overview of scientific productions related to mathematical modeling in the initial years of elementary education in Brazil as a new perspective for Mathematics teaching concerning the period from 2009 to 2018. This research was developed according to the criteria of the qualitative research, using the descriptive and analytical methods and aspects of a research called state of the art. The process of collecting and recording data was carried out using audiovisual means and materials: research at online libraries pertaining to four journals of the Mathematical Education field, Mathematical Education Bulletin (BOLEMA - Boletim de Educação Matemática), Mathematical Education Study and Research Group (GEPEM - Grupo de Estudos e Pesquisas em Educação Matemática) of the Federal University of Rio de Janeiro (UFRJ), Mathematical Education Research (EMP - Educação Matemática Pesquisa) and Zetetiké, as well as the use of the Microsoft Office Word Software, for filtering and analyzing data during the investigative period. One the key objectives having been identified, they were developed by the research, methodologies and activities adopted, reaching the results found. The analysis of such articles allowed for the understanding of how mathematical modeling has been used as an innovative approach to teach this discipline and towards other areas of knowledge, revealing minimal scientific production on the subject and the need for incentives towards development of new research in the field.
DOI: 10.6084/m9.figshare.11351240
title: Diversity and use of Cerrado plants in the community São Miguel, Várzea Grande, MT, Brazil

description: Abstrat: The present study aimed to identify the most important native plant species for this community, to analyze the diversity of use and the diversity of plants, and to relate the value of use with the availability of plants in the environment. The techniques of semi-structured interviews were adopted. In the ethnobotanical survey were cataloged 67 species distributed in 30 botanical families. The most important species for the community, according to the use value were cumbaru, angico and aroeira. Studies with native plants can generate effective alternatives that diminish the impact of the collection on the natural populations.
DOI: 10.6084/m9.figshare.11351246.v1
title: Gluten-free cheese bread from frozen dough: effect of modified cassava starch

description: Abstract The freezing process in dough is widely used to improve fresh product availability for the consumer. The aim of the study was to assess the effect of different modified cassava starches on the quality and textural properties of gluten-free (GF) cheese bread made from frozen GF cheese dough. Three sour cassava starches (extra, express and yucauca) and two chemically modified starches (Expandex® (MCS) and Gel®Baking (OCS)) were used. Samples with sour cassava starches showed higher hardness and number of crumb pores than those with chemically modified starches. Furthermore, a better overall appearance was observed for samples with OCS. Hence, triangle test was carried out between samples with OCS and samples made from fresh dough (control). The consumer panelists identified differences between samples because the GF cheese breads with OCS showed higher compaction and hardness, and they were less salty in taste than the control samples.
DOI: 10.6084/m9.figshare.11351252.v1
title: Mathematical modeling in the initial years as a perspective for mathematics teaching: a brief history of Brazilian publications in journals (from 2009 to 2018)

description: ABSTRACT This article presents an overview of scientific productions related to mathematical modeling in the initial years of elementary education in Brazil as a new perspective for Mathematics teaching concerning the period from 2009 to 2018. This research was developed according to the criteria of the qualitative research, using the descriptive and analytical methods and aspects of a research called state of the art. The process of collecting and recording data was carried out using audiovisual means and materials: research at online libraries pertaining to four journals of the Mathematical Education field, Mathematical Education Bulletin (BOLEMA - Boletim de Educação Matemática), Mathematical Education Study and Research Group (GEPEM - Grupo de Estudos e Pesquisas em Educação Matemática) of the Federal University of Rio de Janeiro (UFRJ), Mathematical Education Research (EMP - Educação Matemática Pesquisa) and Zetetiké, as well as the use of the Microsoft Office Word Software, for filtering and analyzing data during the investigative period. One the key objectives having been identified, they were developed by the research, methodologies and activities adopted, reaching the results found. The analysis of such articles allowed for the understanding of how mathematical modeling has been used as an innovative approach to teach this discipline and towards other areas of knowledge, revealing minimal scientific production on the subject and the need for incentives towards development of new research in the field.
DOI: 10.6084/m9.figshare.11351234
title: Evaluation of models agrometeorologicals for productivity estimation in corn culture

description: Abstract: The objective of this study was to evaluate agrometeorological models to estimate productivity in maize crop, determining the implications of the changes in productivity and the best model adjusted for the conditions evaluated. Clusters of climatological data were used for three maize crops in Chapadão do Sul - MS. The method of estimation of the agroclimatic productivity for the region of study was the best and efficient one to estimate the corn production.
DOI: 10.6084/m9.figshare.11351237
title: Response of root-knot nematode Meloidogyne javanica to ozone

description: ABSTRACT Root-knot nematode, Meloidogyne javanica is a major causal agent of plant diseases on summer crops in fields and greenhouses. In order to reduce environmental concerns, compounds having pesticidal capacity with insignificant residue can be a good alternative to synthetic pesticides. This study was undertaken to investigate the nematicidal capability of ozone under Petri dish (in vitro) and pot (in the rhizosphere of tomato seedlings cv. Super Chief) conditions. The experiments were conducted based on Completely Randomized Design in four replicates with two antimicrobial materials, Cadusafos (0.5, 1.0, 1.5, 2.0, 2.5 and 3 g kg-1 soil) and ozone (0.05, 0.1, 0.2, 0.4, 0.8 and 1.6 g kg-1 soil). Results confirmed the significant in vitro controlling effect of ozone on nematode egg (85%, in 0.4 g kg-1 soil) and second stage juvenile (72%, in 0.4 g kg-1 soil) populations. Also a toxic effect of ozone was observed on the nematode pathogenicity, i.e. galling (83%, in 0.4 g kg-1 soil), on tomato root in pot assays. Plant morphological traits (i.e. root fresh weight, foliage fresh weight, and stem length) were not significantly affected by ozone. Therefore, taking into account the principles of safety in the application of ozone, this material can be suggested as an alternative nematicide, at least at limited and controlled condition.
DOI: 10.6084/m9.figshare.11351231
title: Written production in Spanish textbooks: an analysis of collections approved in PNLD

description: ABSTRACT This article presents an analysis of Spanish language textbooks approved by the Programa Nacional do Livro Didático (PNLD) and distributed to public school students in the country participating in the program. More specifically, written production activities are examined in all Spanish collections that were approved in the first four editions which included the Modern Foreign Language curriculum component (English and Spanish), which are: PNLD 2011 and 2014 (final years of Elementary School ) and PNLD 2012 and 2015 (High School). This way, it sought to build a historical series of analysis of the approved collections focusing on a specific competence - writing - that, according to the public announcement of PNLD 2015, should be one of the prioritized items in approved books. Thus, this research contributes to the promotion of knowledge about issues related to textbooks and language education in Spanish in Brazil, as well as to the reflection upon a Program that reaches more than 99% of the country’s public schools. As theoretical support, both the concept of discursive genre according to Bakhtin (2003) and Volóchinov (2017), and the contributions of researchers of the text and the discourse that include the teaching of writing in their reflections. The results show that the collections approved in the last two edicts analyzed presented higher quality proposals of written production, displaying an understanding of the competence which is closer to that of writing as a process involving the mobilization of numerous linguistic, generic and world knowledge.
DOI: 10.6084/m9.figshare.11351237.v1
title: Response of root-knot nematode Meloidogyne javanica to ozone

description: ABSTRACT Root-knot nematode, Meloidogyne javanica is a major causal agent of plant diseases on summer crops in fields and greenhouses. In order to reduce environmental concerns, compounds having pesticidal capacity with insignificant residue can be a good alternative to synthetic pesticides. This study was undertaken to investigate the nematicidal capability of ozone under Petri dish (in vitro) and pot (in the rhizosphere of tomato seedlings cv. Super Chief) conditions. The experiments were conducted based on Completely Randomized Design in four replicates with two antimicrobial materials, Cadusafos (0.5, 1.0, 1.5, 2.0, 2.5 and 3 g kg-1 soil) and ozone (0.05, 0.1, 0.2, 0.4, 0.8 and 1.6 g kg-1 soil). Results confirmed the significant in vitro controlling effect of ozone on nematode egg (85%, in 0.4 g kg-1 soil) and second stage juvenile (72%, in 0.4 g kg-1 soil) populations. Also a toxic effect of ozone was observed on the nematode pathogenicity, i.e. galling (83%, in 0.4 g kg-1 soil), on tomato root in pot assays. Plant morphological traits (i.e. root fresh weight, foliage fresh weight, and stem length) were not significantly affected by ozone. Therefore, taking into account the principles of safety in the application of ozone, this material can be suggested as an alternative nematicide, at least at limited and controlled condition.
DOI: 10.6084/m9.figshare.11351240.v1
title: Diversity and use of Cerrado plants in the community São Miguel, Várzea Grande, MT, Brazil

description: Abstrat: The present study aimed to identify the most important native plant species for this community, to analyze the diversity of use and the diversity of plants, and to relate the value of use with the availability of plants in the environment. The techniques of semi-structured interviews were adopted. In the ethnobotanical survey were cataloged 67 species distributed in 30 botanical families. The most important species for the community, according to the use value were cumbaru, angico and aroeira. Studies with native plants can generate effective alternatives that diminish the impact of the collection on the natural populations.
DOI: 10.6084/m9.figshare.11351228
title: In vitro conservation of Poincianella pyramidalis (Tul.) L.P. Queiroz under minimal growth conditions

description: ABSTRACT Poincianella pyramidalis (Tul.) L.P. Queiroz, is an arboreal species endemic to Brazil’s Caatinga biome and an important source of lumber and also of medicinal substances. This study aimed to evaluate the effect of the osmotic agents sucrose, sorbitol and mannitol and the growth retardant paclobutrazol (PBZ) on the induction of slow growth in vitro of P. pyramidalis, seeking to establish alternative techniques for ex situ conservation of the species. In the first experiment, plantlets with seven days of age were inoculated on Woody Plant Medium (WPM) supplemented with four concentrations of sucrose (87.64, 131.46, 175.28 or 219.10 mM) combined with 0.0 or 87.64 mM sorbitol or mannitol. In the second experiment, these plantlets were inoculated on WPM medium with 0.0, 1.5, 3.0, 4.5 or 6.0 µM PBZ and supplemented with 87.64 mM sucrose. For both experiments, the survival percentage of the plants was evaluated every 60 days, and at the end of 240 days, the following parameters were recorded: number of green leaves and senescent leaves; length of the aerial part and longest root; and dry mass of the aerial part and roots. The best results to maintain the quality of the P. pyramidalis plants conserved in vitro were obtained on medium supplemented with 219.10 mM sucrose for up to 240 days without subculture. With respect to PBZ, the concentration of 6.0 μM can be recommended for in vitro conservation of P. pyramidalis for 240 days without the need of subculturing.
DOI: 10.6084/m9.figshare.11351222
title: “A Forest Full of Viruses!” Science and Development in the Frontiers of the Brazilian Amazon

description: ABSTRACT From an extensive database of primary and secondary sources, deposited in several institutions, this article aims to establish a panorama of the actions taken to foster science and health in the Brazilian Amazon during the so-called Age Of Development (the 1950s and 60s). Researchers and institutions present in the region during the period looking to form the intended connections between science and governmental actions is the focal point of this article. Especial emphasis is put on “Laboratório de Vírus de Belém” (Belém Virus Laboratory) which was a member of a global virology research program led by the Rockefeller Foundation.
DOI: 10.6084/m9.figshare.11351225
title: The meaning of the organizational decline: the NFU III case

description: Abstract: This research aimed to describe the meaning of experiences of former employees of the construction of the Nitrogenated Fertilizer Unit III in Três Lagoas, MS, through the organizational decline phenomenon. The methodology consisted in documentary analysis and interviews. The results organized the central ideas in cognitive maps of each of the six participants that represent the schema of the organizational decline. The conclusions of the study show that the organizational decline is still a phenomenon very little explored, especially having the individual as the unit of analysis.
DOI: 10.6084/m9.figshare.11351234.v1
title: Evaluation of models agrometeorologicals for productivity estimation in corn culture

description: Abstract: The objective of this study was to evaluate agrometeorological models to estimate productivity in maize crop, determining the implications of the changes in productivity and the best model adjusted for the conditions evaluated. Clusters of climatological data were used for three maize crops in Chapadão do Sul - MS. The method of estimation of the agroclimatic productivity for the region of study was the best and efficient one to estimate the corn production.
DOI: 10.6084/m9.figshare.11351216
title: RE-ESTERIFICATION OF MACAUBA ACID OIL USING GLYCEROL FOR ACIDITY REDUCTION AND BIODIESEL PRODUCTION

description: Abstract Biodiesel production using acid oils is an important alternative for biofuel cost reduction. However, it is a huge challenge for homogeneous transesterification, the main industrial route commonly used. This paper presents macauba oil with high acidity, 43.90 w/w%, as a potential raw material for biodiesel production. The acidity was reduced to 0.8 w/w% after re-esterification (80 min) with glycerol at high temperature (235 °C), without catalysts. Zinc (powder and coating) and NbOPO4 were also tested as catalysts in comparison with the reaction without a catalyst. Reactions catalyzed by metallic Zn produced a large amount of Zn carboxylate, an undesirable soap, due to the high Zn leaching. In contrast with the literature, Zinc did not show good catalytic activity, as confirmed by the kinetic parameters. NbOPO4 was not a good catalyst, too. Reaction without catalysts was performed using nitrogen as a carrier gas and it was compared with reaction under vacuum to remove co-produced water. Nitrogen showed the best result for re-esterification, avoiding degradation reactions. Triglycerides (TG) were the prevalent products in reactions using nitrogen. After re-esterification, the oil was easily converted into biodiesel with high ester content (98.4%) of methyl ester by alkaline transesterification.
DOI: 10.6084/m9.figshare.11351219
title: Advances in citrus propagation in Brazil

description: Abstract Citriculture is an important agricultural activity worldwide, occupying a relevant position in Brazil among fruit tree production for both the fresh fruit market and the processing industry for concentrated orange juice export. Recent advances in the country’s citrus nursery tree production system have been essential to guarantee the efficiency and competitiveness of Brazilian citriculture. The implementation of strict laws and regulations to produce trees in protected environments and improvements in production techniques for basic citrus propagation materials and nursery trees in São Paulo state has excluded the insect vectors of destructive diseases such as citrus variegated chlorosis and huanglongbing, making this an innovative reference system for citrus propagation around the globe. The main aspects of these advances are presented and discussed in this review, including advances in propagation techniques, scion and rootstock selection, genetic characterization and certification, tree size standards, cultural practices such as irrigation and fertilization for the production of citrus propagation materials and nursery trees, and nursery management tools.
DOI: 10.6084/m9.figshare.11351222.v1
title: “A Forest Full of Viruses!” Science and Development in the Frontiers of the Brazilian Amazon

description: ABSTRACT From an extensive database of primary and secondary sources, deposited in several institutions, this article aims to establish a panorama of the actions taken to foster science and health in the Brazilian Amazon during the so-called Age Of Development (the 1950s and 60s). Researchers and institutions present in the region during the period looking to form the intended connections between science and governmental actions is the focal point of this article. Especial emphasis is put on “Laboratório de Vírus de Belém” (Belém Virus Laboratory) which was a member of a global virology research program led by the Rockefeller Foundation.
DOI: 10.6084/m9.figshare.11351228.v1
title: In vitro conservation of Poincianella pyramidalis (Tul.) L.P. Queiroz under minimal growth conditions

description: ABSTRACT Poincianella pyramidalis (Tul.) L.P. Queiroz, is an arboreal species endemic to Brazil’s Caatinga biome and an important source of lumber and also of medicinal substances. This study aimed to evaluate the effect of the osmotic agents sucrose, sorbitol and mannitol and the growth retardant paclobutrazol (PBZ) on the induction of slow growth in vitro of P. pyramidalis, seeking to establish alternative techniques for ex situ conservation of the species. In the first experiment, plantlets with seven days of age were inoculated on Woody Plant Medium (WPM) supplemented with four concentrations of sucrose (87.64, 131.46, 175.28 or 219.10 mM) combined with 0.0 or 87.64 mM sorbitol or mannitol. In the second experiment, these plantlets were inoculated on WPM medium with 0.0, 1.5, 3.0, 4.5 or 6.0 µM PBZ and supplemented with 87.64 mM sucrose. For both experiments, the survival percentage of the plants was evaluated every 60 days, and at the end of 240 days, the following parameters were recorded: number of green leaves and senescent leaves; length of the aerial part and longest root; and dry mass of the aerial part and roots. The best results to maintain the quality of the P. pyramidalis plants conserved in vitro were obtained on medium supplemented with 219.10 mM sucrose for up to 240 days without subculture. With respect to PBZ, the concentration of 6.0 μM can be recommended for in vitro conservation of P. pyramidalis for 240 days without the need of subculturing.
DOI: 10.6084/m9.figshare.11351219.v1
title: Advances in citrus propagation in Brazil

description: Abstract Citriculture is an important agricultural activity worldwide, occupying a relevant position in Brazil among fruit tree production for both the fresh fruit market and the processing industry for concentrated orange juice export. Recent advances in the country’s citrus nursery tree production system have been essential to guarantee the efficiency and competitiveness of Brazilian citriculture. The implementation of strict laws and regulations to produce trees in protected environments and improvements in production techniques for basic citrus propagation materials and nursery trees in São Paulo state has excluded the insect vectors of destructive diseases such as citrus variegated chlorosis and huanglongbing, making this an innovative reference system for citrus propagation around the globe. The main aspects of these advances are presented and discussed in this review, including advances in propagation techniques, scion and rootstock selection, genetic characterization and certification, tree size standards, cultural practices such as irrigation and fertilization for the production of citrus propagation materials and nursery trees, and nursery management tools.
DOI: 10.6084/m9.figshare.11351225.v1
title: The meaning of the organizational decline: the NFU III case

description: Abstract: This research aimed to describe the meaning of experiences of former employees of the construction of the Nitrogenated Fertilizer Unit III in Três Lagoas, MS, through the organizational decline phenomenon. The methodology consisted in documentary analysis and interviews. The results organized the central ideas in cognitive maps of each of the six participants that represent the schema of the organizational decline. The conclusions of the study show that the organizational decline is still a phenomenon very little explored, especially having the individual as the unit of analysis.
DOI: 10.6084/m9.figshare.11351210
title: Interdependence between networks and member firms in the evolution of inter-organizational networks

description: Abstract Cooperation among firms through networks is a form to obtain a variety of resources. Over time, networks can become an exclusive provider of some resources used by members, leading to dependencys. This study is interested in this phenomenon, and aims to examine how firm-network interdependence grows throughout the development of inter-organizational networks. The research was conducted with networks that were in distinct stages of evolution (formation, development, and professionalization). Interviews were carried out with the presidents of the networks and two member firms of each network. The study identified an inversion in the relation of interdependence investigated, where the network is dependent of its members in the first stages of evolution and, as its governance and structure consolidate, members develop a dependency relationship toward the network and the benefits it offers.