cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.5720482
title: Number theory in training of Mathematics teachers: (mis)understandings about primality and fundamental theorem of Arithmetic

description: Abstract: This article discusses the ways in which a group of undergraduates in Mathematics understand concepts related to number theory, including "prime numbers" and "fundamental theorem of arithmetic". Through a qualitative approach, the answers for two questions were collected from ten subjects, which were analyzed in the light of the concept of transparency/opacity of numerical representations, in order to verify whether there was consistency between the concepts set out in one answer in comparison to the problem that should be solved in the other. The text highlights strategies used by research participants related to issues involving the primality of natural numbers, and the importance of formal knowledge of number theory by the mathematics teachers in training. In addition, there were elements that allowed us to conclude that the appeal to intuition, though not always correct, and too prescriptive often occurred, both in the context researched and in the works used as theoretical references.
DOI: 10.6084/m9.figshare.5720482.v1
title: Number theory in training of Mathematics teachers: (mis)understandings about primality and fundamental theorem of Arithmetic

description: Abstract: This article discusses the ways in which a group of undergraduates in Mathematics understand concepts related to number theory, including "prime numbers" and "fundamental theorem of arithmetic". Through a qualitative approach, the answers for two questions were collected from ten subjects, which were analyzed in the light of the concept of transparency/opacity of numerical representations, in order to verify whether there was consistency between the concepts set out in one answer in comparison to the problem that should be solved in the other. The text highlights strategies used by research participants related to issues involving the primality of natural numbers, and the importance of formal knowledge of number theory by the mathematics teachers in training. In addition, there were elements that allowed us to conclude that the appeal to intuition, though not always correct, and too prescriptive often occurred, both in the context researched and in the works used as theoretical references.
DOI: 10.6084/m9.figshare.5720476
title: Proposal for a mix design method for coating mortar with artificial crushing sand

description: Abstract The aim of this study was to propose and analyse an experimental mix design method for coating mortars using artificial crushing sand as fine aggregate. We sought to identify and standardize the mix design procedures so as to fulfil the working conditions for an external mortar coating under the specifications of ABNT NBR 13281:2005 (ABNT, 2005a). The proposed mix design method was assessed using the following tests: entrained air content, compressive strength, flexural strength tests and adherence, modulus of elasticity, water absorption, porosity, cracking, stereoscopic magnifier images and statistical analysis. We used Portland cement type II with blast furnace slag, hydrated lime type I, and artificial crushing sand gneiss. The conclusion of the study is that the proposed method is efficient and produces good quality coating mortars using artificial crushing sand, according to pre-established conditions. It is an easy and flexible way to obtain the appropriate levels of each component and the appropriate trait, representing a good alternative for the performance of this type of dosage.
DOI: 10.6084/m9.figshare.5720470
title: Improving Nutrition Utilization and Meat Quality of Broiler Chickens Through Solid-State Fermentation of Agricultural By-Products by Aureobasidium Pullulans

description: ABSTRACT A 35 d trial was conducted to evaluate the effects of dietary supplementation of co-fermented agricultural by-products, soybean hulls and Pleurotus eryngii stalk residue (PESR), with Aureobasidium pullulans on nutrients digestibility and meat quality in broilers fed on conventional corn-soybean meal basal diet. A total of 400 1-d-old Ross broilers were allotted to 4 dietary treatments with 4 replicate pens (25 birds per pen). Birds were fed the corn-soybean meal diets supplemented with 0% (CON), 0.5% fermented soybean hulls (0.5% FSBH), 0.5% fermented soybean hulls partially replaced with PESR (0.5% FSHP) and 1.0% FSHP. The broilers fed on the diet that contained fermented products had higher total tract apparent digestibility for hemicellulose than those on CON (p&lt;0.05). Meanwhile, the birds fed on 0.5% FSHP also showed the lightest duodenum and jejunum weight among all groups. Compared with the CON, the inclusion of 1.0% FSHP in the diet significantly decreased ammonia N concentration in cecum followed by 0.5% FSHP and subsequent 0.5% FSBH group. Dietary supplementation of fermented products significantly improved WHC and increased protein content in meat as compared with the CON. Moreover, the fat content in meat decreased in the broilers that received 0.5% FSBH and 1.0% FSHP. In conclusion, dietary supplementation of co-fermented agricultural by-products, PESR and soybean meal, could improve the digestibility of hemicellulose and decrease the cecal ammonia N concentration; moreover, the increased WHC and protein level as well as decreased fat content in meat suggested the promising utilization of these low-cost materials as broiler feed additives.
DOI: 10.6084/m9.figshare.5720470.v1
title: Improving Nutrition Utilization and Meat Quality of Broiler Chickens Through Solid-State Fermentation of Agricultural By-Products by Aureobasidium Pullulans

description: ABSTRACT A 35 d trial was conducted to evaluate the effects of dietary supplementation of co-fermented agricultural by-products, soybean hulls and Pleurotus eryngii stalk residue (PESR), with Aureobasidium pullulans on nutrients digestibility and meat quality in broilers fed on conventional corn-soybean meal basal diet. A total of 400 1-d-old Ross broilers were allotted to 4 dietary treatments with 4 replicate pens (25 birds per pen). Birds were fed the corn-soybean meal diets supplemented with 0% (CON), 0.5% fermented soybean hulls (0.5% FSBH), 0.5% fermented soybean hulls partially replaced with PESR (0.5% FSHP) and 1.0% FSHP. The broilers fed on the diet that contained fermented products had higher total tract apparent digestibility for hemicellulose than those on CON (p&lt;0.05). Meanwhile, the birds fed on 0.5% FSHP also showed the lightest duodenum and jejunum weight among all groups. Compared with the CON, the inclusion of 1.0% FSHP in the diet significantly decreased ammonia N concentration in cecum followed by 0.5% FSHP and subsequent 0.5% FSBH group. Dietary supplementation of fermented products significantly improved WHC and increased protein content in meat as compared with the CON. Moreover, the fat content in meat decreased in the broilers that received 0.5% FSBH and 1.0% FSHP. In conclusion, dietary supplementation of co-fermented agricultural by-products, PESR and soybean meal, could improve the digestibility of hemicellulose and decrease the cecal ammonia N concentration; moreover, the increased WHC and protein level as well as decreased fat content in meat suggested the promising utilization of these low-cost materials as broiler feed additives.
DOI: 10.6084/m9.figshare.5720461
title: Periodic complex map germs and foliations

description: Abstract In this paper we study topological and analytical conditions on the orbits of a germ of diffeomorphism in the complex plane in order to obtain periodicity. In particular, we give a simple proof of a finiteness criteria for groups of analytic diffeomorphisms, stated in Brochero Martínez 2003. As an application, we derive some consequences about the integrability of complex vector fields in dimension three in a neighborhood of a singular point.
DOI: 10.6084/m9.figshare.5720458
title: A CYCLE OF ORGANIC FERTILIZATION OF CASHEW TREES IMPROVES THE YIELD AND QUALITY OF THE PRODUCTS

description: ABSTRACT This study aimed to evaluate the effect of organic fertilizers on production and quality of fruits and pseudo fruits on adult trees of Anacardium occidentale L. by a productive cycle. We established three treatments; organic fertilization (BIO), synthetic fertilization (SF), and unfertilized (UF). The number of panicles m-3, number of flowers per panicle and the number of fruits m-3 in the trees was measured. After harvest, physicochemical analyses were performed to fruits and pseudo fruits. Although the SF treatment promoted a greater number of panicles per unit leaf area (P &lt; 0.05) on the other treatments, the yield (measured both as the amount of fruit-pseudo fruit m-3) was the same (P &gt; 0.05) with BIO treatment. However, the amount of fruit (main marketed product) was higher in BIO (1.80 kg tree-1) compared to the other two treatments (SF = 1.35; UF = 1.09). The BIO treatment increased by 81% polyphenol content compared to unfertilized treatment. Similarly, fat content and titratable acidity were higher in BIO, compared to treatments without fertilization and synthetic fertilization (P &lt; 0.05). It was demonstrated that the application of biofertilizer in a production cycle increases fruit production and modifies the chemical composition of seeds.
DOI: 10.6084/m9.figshare.5720458.v1
title: A CYCLE OF ORGANIC FERTILIZATION OF CASHEW TREES IMPROVES THE YIELD AND QUALITY OF THE PRODUCTS

description: ABSTRACT This study aimed to evaluate the effect of organic fertilizers on production and quality of fruits and pseudo fruits on adult trees of Anacardium occidentale L. by a productive cycle. We established three treatments; organic fertilization (BIO), synthetic fertilization (SF), and unfertilized (UF). The number of panicles m-3, number of flowers per panicle and the number of fruits m-3 in the trees was measured. After harvest, physicochemical analyses were performed to fruits and pseudo fruits. Although the SF treatment promoted a greater number of panicles per unit leaf area (P &lt; 0.05) on the other treatments, the yield (measured both as the amount of fruit-pseudo fruit m-3) was the same (P &gt; 0.05) with BIO treatment. However, the amount of fruit (main marketed product) was higher in BIO (1.80 kg tree-1) compared to the other two treatments (SF = 1.35; UF = 1.09). The BIO treatment increased by 81% polyphenol content compared to unfertilized treatment. Similarly, fat content and titratable acidity were higher in BIO, compared to treatments without fertilization and synthetic fertilization (P &lt; 0.05). It was demonstrated that the application of biofertilizer in a production cycle increases fruit production and modifies the chemical composition of seeds.
DOI: 10.6084/m9.figshare.5720455
title: GROWTH OF ‘PRATA-ANA’ BANANA’S MICROSHOOTS CLONE GORUTUBA FROM SYNTHETIC SEEDS:SUBSTRATES AND BAP CONCENTRATION

description: ABSTRACT The banana crop stands out as an activity of great social and economic importance in Brazil, which occupies the fifth place in world production. Synthetic seed production is becoming promising for a micropropagation and in vitro conservation. The aim of the study was to analyze the conversion and growth of ‘Prata-anã’ banana’s microshoots clone Gorutuba from synthetic seed in MS medium and vermiculite, different substrates and concentrations of BAP (6-benzylaminopurine) associated with ANA (acetic naphthalene acid) in the constitution of its capsule were tested. The microshoots were immersed in the sodium alginate matrix (3%) and dripped in a solution of CaCl2.2H2O (100 mM) for complexation and then in KNO3 solution (100 mM) to decomplex. The experimental design was completely randomized in a 2 x 5 factorial design (substrate x BAP concentrations), containing different substrates (MS culture medium and vermiculite) and BAP concentrations (2.22, 4.44, 6.66, 8.88 and 13.32 µmol L-1) associated with NAA (naphthalene acetic acid) 0.54 µmol L-1, totaling 10 treatments, with 4 replicates, and that each replicate containing 5 seeds. The evaluations of conversion, number of leaves, leaf length, leaf height, number of roots, root length and oxidation were performed at 30 and 60 days.The use of the MS medium provided better growth results in relation to vermiculite as substrate, in which the different BAP concentrations did not differ from each other. It was found that, in MS culture medium, BAP concentrations above 8.88 µmol L-1 in the capsule composition are not indicated for microshoots growth.
DOI: 10.6084/m9.figshare.5720455.v1
title: GROWTH OF ‘PRATA-ANA’ BANANA’S MICROSHOOTS CLONE GORUTUBA FROM SYNTHETIC SEEDS:SUBSTRATES AND BAP CONCENTRATION

description: ABSTRACT The banana crop stands out as an activity of great social and economic importance in Brazil, which occupies the fifth place in world production. Synthetic seed production is becoming promising for a micropropagation and in vitro conservation. The aim of the study was to analyze the conversion and growth of ‘Prata-anã’ banana’s microshoots clone Gorutuba from synthetic seed in MS medium and vermiculite, different substrates and concentrations of BAP (6-benzylaminopurine) associated with ANA (acetic naphthalene acid) in the constitution of its capsule were tested. The microshoots were immersed in the sodium alginate matrix (3%) and dripped in a solution of CaCl2.2H2O (100 mM) for complexation and then in KNO3 solution (100 mM) to decomplex. The experimental design was completely randomized in a 2 x 5 factorial design (substrate x BAP concentrations), containing different substrates (MS culture medium and vermiculite) and BAP concentrations (2.22, 4.44, 6.66, 8.88 and 13.32 µmol L-1) associated with NAA (naphthalene acetic acid) 0.54 µmol L-1, totaling 10 treatments, with 4 replicates, and that each replicate containing 5 seeds. The evaluations of conversion, number of leaves, leaf length, leaf height, number of roots, root length and oxidation were performed at 30 and 60 days.The use of the MS medium provided better growth results in relation to vermiculite as substrate, in which the different BAP concentrations did not differ from each other. It was found that, in MS culture medium, BAP concentrations above 8.88 µmol L-1 in the capsule composition are not indicated for microshoots growth.
DOI: 10.6084/m9.figshare.5720452
title: Impacts of lessons management based on Mathematics words problems on learning

description: ABSTRACT This article presents potential successes and constraints presented in lessons based on written words problems of mathematics impacting on the learning process of students in the eighth year of Portuguese classes in an elementary school. Those problems have been proposed by future teachers during a supervised internship at the University of Lisbon. The data emerged from strata of interaction/intervention of a teacher-coach with three interns regarding the actions of their lessons based on written words problems of Mathematics. Successes have been identified such as the association of geometric figures to their algebraic expressions and the conduction of explanations by direct questions on the subject, as well as constraints as confusing mathematical concepts, written commands with no meaning for students, terms without proper contextualization to the mathematical context. The research has been supported by authors and researchers in the field of problem solving, the understanding of statements of math problems and the training in/of teaching practice.
DOI: 10.6084/m9.figshare.5720452.v1
title: Impacts of lessons management based on Mathematics words problems on learning

description: ABSTRACT This article presents potential successes and constraints presented in lessons based on written words problems of mathematics impacting on the learning process of students in the eighth year of Portuguese classes in an elementary school. Those problems have been proposed by future teachers during a supervised internship at the University of Lisbon. The data emerged from strata of interaction/intervention of a teacher-coach with three interns regarding the actions of their lessons based on written words problems of Mathematics. Successes have been identified such as the association of geometric figures to their algebraic expressions and the conduction of explanations by direct questions on the subject, as well as constraints as confusing mathematical concepts, written commands with no meaning for students, terms without proper contextualization to the mathematical context. The research has been supported by authors and researchers in the field of problem solving, the understanding of statements of math problems and the training in/of teaching practice.
DOI: 10.6084/m9.figshare.5720449
title: EVALUATION OF NITROGEN MONITORING, BUD FERTILITYAND ‘THOMPSON SEEDLESS’ GRAPEVINE PRODUCTION ON DIFFERENT ROOTSTOCKS

description: ABSTRACT Methods of nitrogen analysis were adopted in leaf tissues in the laboratory, nitrate content in the sap of petioles and chlorophyll relative index (CRI, in SPAD unit), as well as the evaluation of the buds fertility rates, production and qualitative aspects of cluster and berries of ‘Thompson Seedless’ vine, grafted on rootstocks ‘Harmony’, ‘Jales’ ‘Paulsen 1103’ and ‘SO4’. The applied dose of N was 80 kg ha-1, and the experiment was installed in the Submédio do Vale do São Francisco, Brazil. The experiment was performed in a randomized blocks design, with four treatments and five replicates, with the experimental plot represented by five plants. In addition to the analysis of N, cluster length and width (cm) and fresh mass (g), berries length, diameter (mm), volume (mL), mass of fresh matter of berries, soluble solids (SS), titratable acidity (TA), SS/TA ratio, potential bud fertility (productive, vegetative, dead and dark buds in %) and real bud fertility (%). There were differences in nitrogen content in the leaves, nitrate in sap and CRI of ‘Thompson Seedless’ in relation to rootstocks. ‘Thompson Seedless’ expressed better potential for the development of clusters and berries when grafted on ‘Harmony’.
DOI: 10.6084/m9.figshare.5720449.v1
title: EVALUATION OF NITROGEN MONITORING, BUD FERTILITYAND ‘THOMPSON SEEDLESS’ GRAPEVINE PRODUCTION ON DIFFERENT ROOTSTOCKS

description: ABSTRACT Methods of nitrogen analysis were adopted in leaf tissues in the laboratory, nitrate content in the sap of petioles and chlorophyll relative index (CRI, in SPAD unit), as well as the evaluation of the buds fertility rates, production and qualitative aspects of cluster and berries of ‘Thompson Seedless’ vine, grafted on rootstocks ‘Harmony’, ‘Jales’ ‘Paulsen 1103’ and ‘SO4’. The applied dose of N was 80 kg ha-1, and the experiment was installed in the Submédio do Vale do São Francisco, Brazil. The experiment was performed in a randomized blocks design, with four treatments and five replicates, with the experimental plot represented by five plants. In addition to the analysis of N, cluster length and width (cm) and fresh mass (g), berries length, diameter (mm), volume (mL), mass of fresh matter of berries, soluble solids (SS), titratable acidity (TA), SS/TA ratio, potential bud fertility (productive, vegetative, dead and dark buds in %) and real bud fertility (%). There were differences in nitrogen content in the leaves, nitrate in sap and CRI of ‘Thompson Seedless’ in relation to rootstocks. ‘Thompson Seedless’ expressed better potential for the development of clusters and berries when grafted on ‘Harmony’.
DOI: 10.6084/m9.figshare.5720443
title: ‘JAFFA’ SWEET ORANGE PLANTS GRAFTED ONTO FIVE ROOTSTOCKS

description: ABSTRACT Low genetic diversity of citrus scion and rootstock cultivars makes the crop more vulnerable to diseases and pests. The objective of this study was to evaluate the performance of ‘Jaffa’ sweet orange grafted onto five rootstocks over six harvests in subtropical conditions in the north of Paraná state, Brazil. The experiment used a randomized block design, with six replications and two trees per plot, spaced at 7.0 m x 4.0 m. The rootstocks were: ‘Rangpur’ lime, ‘Cleopatra’ and ‘Sunki’ mandarins, ‘Fepagro C-13’ citrange, and ‘Swingle’ citrumelo. The variables evaluated were vigor, yield, and yield efficiency of the trees as well as the physical and chemical characteristics of the fruits. Data were subjected to analysis of variance, complemented by Scott-Knott test at 5% probability. The smallest tree canopy for ‘Jaffa’ sweet orange plants was induced by the ‘Rangpur’ lime rootstock. The trees had the same cumulative yield performance over six seasons for all rootstocks. The best yield efficiency for ‘Jaffa’ sweet orange trees was provided by ‘Fepagro C-13’ citrange rootstock. With regard to fruit quality, no differences were observed among the rootstocks and the ‘Jaffa’ sweet orange fruits met the standards required by the fresh fruit market and the fruit processing industry.
DOI: 10.6084/m9.figshare.5720443.v1
title: ‘JAFFA’ SWEET ORANGE PLANTS GRAFTED ONTO FIVE ROOTSTOCKS

description: ABSTRACT Low genetic diversity of citrus scion and rootstock cultivars makes the crop more vulnerable to diseases and pests. The objective of this study was to evaluate the performance of ‘Jaffa’ sweet orange grafted onto five rootstocks over six harvests in subtropical conditions in the north of Paraná state, Brazil. The experiment used a randomized block design, with six replications and two trees per plot, spaced at 7.0 m x 4.0 m. The rootstocks were: ‘Rangpur’ lime, ‘Cleopatra’ and ‘Sunki’ mandarins, ‘Fepagro C-13’ citrange, and ‘Swingle’ citrumelo. The variables evaluated were vigor, yield, and yield efficiency of the trees as well as the physical and chemical characteristics of the fruits. Data were subjected to analysis of variance, complemented by Scott-Knott test at 5% probability. The smallest tree canopy for ‘Jaffa’ sweet orange plants was induced by the ‘Rangpur’ lime rootstock. The trees had the same cumulative yield performance over six seasons for all rootstocks. The best yield efficiency for ‘Jaffa’ sweet orange trees was provided by ‘Fepagro C-13’ citrange rootstock. With regard to fruit quality, no differences were observed among the rootstocks and the ‘Jaffa’ sweet orange fruits met the standards required by the fresh fruit market and the fruit processing industry.
DOI: 10.6084/m9.figshare.5720440
title: Dung beetles in a Caatinga Natural Reserve: a threatened Brazilian dry-forest with high biological value

description: ABSTRACT The Caatinga is an endemic and threatened dry-forest biome distributed across northern Brazil. We evaluated the conservation value of a Caatinga Natural Reserve (NR) - Floresta Nacional (FLONA) Contendas do Sincorá - using Scarabaeinae dung beetles as a biodiversity indicator. Specifically, we contrasted two zones impacted by two distinct intensity of selective logging that happened inside the NR until 1997. Dung beetles were collected 14 years after logging, using baited pitfall traps within three main habitats (riparian forest, regenerating Caatinga or arboreal Caatinga) found in two zones (Preservation and Management Zones). A total of 1,214 individuals from 21 species were sampled. The two zones presented distinct species composition, although the habitats did not exhibit such differences. Our results indicated that the secondary areas are in a conservation status similar to arboreal Caatinga and riparian forest, 14 y after logging. Furthermore, we identified seven habitat-indicator species, two of them typical to Caatinga biome, highlighting the importance of updates in NR management plan considering the Scarabaeinae regional diversity management.