cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.9276161.v1
title: A Systematic Review of Relevant Variables in the Production of Errors in Mathematics

description: Abstract Issues involving the identification, analysis, and interpretation of mistakes made by mathematics students are not recent, although much still can be investigated on this subject. The aim of the present study was to identify, from the existing literature, relevant variables in the production of errors in mathematics. A systematic review of the literature of the period between 2012 and 2017 was independently performed by two researchers to evaluate the concordance between them. We searched the ERIC, PsycArticles, SciELO and Math Educ Database databases with the descriptors error AND mathematics OR math, error AND procedure AND mathematics OR math, error pattern AND mathematics OR math, analysis of errors AND mathematics OR math, systemic error AND mathematics OR math and their correspondents in Portuguese and Spanish. A total of 415 articles were identified, of which 31 were analyzed, dealing with error production. The variables identified as responsible for producing the most common errors refer to the student's internal causes or unspecified difficulties and errors in the teaching procedures. Responsibility for error is usually attributed to the students and the main trend of the research is only to inform the production of errors, since only a few studies have indicated ways to avoid or deal with errors produced by students in a specific and descriptive way. We emphasize importance and necessity of investigating educational practices to prevent and deal with errors.
DOI: 10.6084/m9.figshare.9276158.v1
title: A test method for determining the oil concentration in water samples contaminated with oil and grease

description: ABSTRACT Oil and grease concentration in water samples contaminated by oily residues can be determined by the procedures established in the Standard Methods for the Examination of Water and Wastewater. However, its application does not always result in adequate values or satisfactory accuracy levels in order to meet regulatory standards. In this sense, this paper presents a test-method proposal for determining mineral oil concentration in water samples from runoff of paved areas subject to oil and grease spillages. This method is based on the partition-gravimetric method (5520 B) established by the Standard Methods. In the new procedure, the separation between the extraction solvent containing residues and the aqueous phase remainder was replaced by the whole water sample evaporation in an oven at 85ºC. In order to assess the proposed method’s efficiency, samples were prepared with known oil concentrations of 200, 100, 50, 25 and 15 mg.L-1, in distilled water and laboratory tests were performed to determine the oil content, according to the new procedure. The values obtained for the oil concentrations through the proposed procedure are quite satisfactory, presenting linear behavior in relation to the reference concentrations. This fact evidences the reliability of the new method and its applicability in determining the oil concentration in contaminated water samples from runoff in pavement surfaces.
DOI: 10.6084/m9.figshare.9276164.v1
title: Incorporation of nitrogen and phosphorus in the leaves of Typha domingensis Pers. macrophyte during treat dairy cattle wastewater in constructed wetlands

description: ABSTRACT The objective of this study was to evaluate the performance of macrophyte Typha domingensis Pers. in different development stages in the nitrogen and phosphorus removal from a horizontal flow constructed wetland (WCH) applied for dairy cattle wastewater treatment. In this way, growth, nitrogen and phosphorus levels in the leaf tissue of macrophytes were monitored during a 120-day growth period. Typha domingensis Pers. macrophyte was responsible for a mean removal of 5.12 and 3.16% of the applied loads in the WCH, for nitrogen and phosphorus, respectively. The higher nutriens removal rates (30.2 and 6.4 g P kg-1) were identified when the higher tissue growth rates occurred (24.17 cm week-1).
DOI: 10.6084/m9.figshare.9276155
title: Perception and use of non-native and invasive flora from Sierras de Córdoba in central Argentina

description: ABSTRACT The perception, knowledge and use of non-native and invasive flora by social actors associated with protected areas in central Argentina were analyzed. Contemporary ethnoecology methods were followed. A total of 108 non-native species of botanical interest was documented. An organization of species is proposed according to their Relative Importance, and on an attitude scale in relation to conservation/elimination interest. In the case of invasive species, perceptions on ecology, importance and/or control are discussed based on the profiles of the social actors. The results shed light upon local points of view and nuances of what “non-native” and “invasive” means to the studied rural population. The use spectrum for some of the non-native species has shed light on adaptation to the cultural use of species based on resource availability, not necessarily associated with preference. Additionally, it should be noted that local actors perceive non-native and invasive species differently, which should be considered in the development of management and conservation guidelines.
DOI: 10.6084/m9.figshare.9276146
title: Effect of moisture content of two paddy varieties on the physical and cooked properties of produced rice

description: Abstract Yasemin and Anber are the main rice varieties cultivated in Iraq. Anber is the favorite variety in Iraq because of its unique flavor, and Yasemin is the most cultivated variety. Determining the suitable moisture content of both varieties to produce high extraction rate (lowest rice breakage), good rice whiteness, and the best rice quality in terms of cooked properties was the purpose of this study. Moisture content (MC) (10%, 12%, 14%, 16%) of Yasemin and Anber were used, and targeted whiteness (32, 34, and 36) were obtained by using different milling times. Results showed that the best moisture content was 14% for Yasemin variety and 10% for Anber variety in terms of extraction rate. Process time increasing led to reduction of extraction rate and increased rice whiteness. The highest extraction rate of Yasemin and Anber was 56% and 64% with 32 whiteness, respectively. Kernel breakage had opposite relationship with extraction rate. Yasemin and Anber varieties were classified as short grain rice depending on their length. The maximum elongation was at 16% MC for Yasemin variety and at 10% MC for Anber variety, which increased 60% more than uncooked rice. There was no definite pattern observed for increasing rice volume (width and weight). In conclusion, the extraction rate of Yasemin and Anber varieties was increased at 14% and 10% MC, respectively. For cooked properties, 10% MC of Anber was the best in terms of rice elongation, while 16% MC was the best for Yasemin variety.
DOI: 10.6084/m9.figshare.9276155.v1
title: Perception and use of non-native and invasive flora from Sierras de Córdoba in central Argentina

description: ABSTRACT The perception, knowledge and use of non-native and invasive flora by social actors associated with protected areas in central Argentina were analyzed. Contemporary ethnoecology methods were followed. A total of 108 non-native species of botanical interest was documented. An organization of species is proposed according to their Relative Importance, and on an attitude scale in relation to conservation/elimination interest. In the case of invasive species, perceptions on ecology, importance and/or control are discussed based on the profiles of the social actors. The results shed light upon local points of view and nuances of what “non-native” and “invasive” means to the studied rural population. The use spectrum for some of the non-native species has shed light on adaptation to the cultural use of species based on resource availability, not necessarily associated with preference. Additionally, it should be noted that local actors perceive non-native and invasive species differently, which should be considered in the development of management and conservation guidelines.
DOI: 10.6084/m9.figshare.9276143
title: Polyunsaturated fatty acids and nutritional quality of five freshwater fish species cultivated in the western region of Santa Catarina, Brazil

description: Abstract There is a paucity of information about the chemical composition of commercially important freshwater fish species (Nile tilapia, bighead carp, grass carp, common carp and silver carp) cultivated in the western region of Santa Catarina, Brazil. This study determined the moisture, ash, protein and lipid contents and the fatty acid composition, as well as the nutritional quality of the lipids in fillets of these five freshwater fish species. Moisture was the most prominent fish component (74.7%-81.7%), followed by protein (15.8%-18.8%) and lipids (0.4%-8.2%). Saturated palmitic acid (90-1740 mg/100 g) and monounsaturated oleic acid (70-2260 mg/100 g) were the major fatty acids found in all the fish species. The grass and common carps and Nile tilapia (caged) had high contents of γ-linolenic acid (GLA), with an average of 536 mg/100 g. Bighead carp was the richest source of ω-3 PUFA, mainly eicosapentaenoic (EPA, 400 mg/100 g) and docosahexaenoic (DHA, 620 mg/100 g) acids, and had the highest ω-3/ω-6 ratio of 6.11. The nutritional evaluation of the fatty acid profile indicated that average values were: atherogenicity index (AI) ~0.59, thrombogenicity index (TI) ~0.82, hypocholesterolemic/hypercholesterolemic ratio (H/H ~1.98), polyunsaturated/saturated ratio (P/S) ~0.43 and ω-3/ω-6 ratio ~2.18, values suggesting that the consumption of these freshwater fish species could be of benefit to human health.
DOI: 10.6084/m9.figshare.9276146.v1
title: Effect of moisture content of two paddy varieties on the physical and cooked properties of produced rice

description: Abstract Yasemin and Anber are the main rice varieties cultivated in Iraq. Anber is the favorite variety in Iraq because of its unique flavor, and Yasemin is the most cultivated variety. Determining the suitable moisture content of both varieties to produce high extraction rate (lowest rice breakage), good rice whiteness, and the best rice quality in terms of cooked properties was the purpose of this study. Moisture content (MC) (10%, 12%, 14%, 16%) of Yasemin and Anber were used, and targeted whiteness (32, 34, and 36) were obtained by using different milling times. Results showed that the best moisture content was 14% for Yasemin variety and 10% for Anber variety in terms of extraction rate. Process time increasing led to reduction of extraction rate and increased rice whiteness. The highest extraction rate of Yasemin and Anber was 56% and 64% with 32 whiteness, respectively. Kernel breakage had opposite relationship with extraction rate. Yasemin and Anber varieties were classified as short grain rice depending on their length. The maximum elongation was at 16% MC for Yasemin variety and at 10% MC for Anber variety, which increased 60% more than uncooked rice. There was no definite pattern observed for increasing rice volume (width and weight). In conclusion, the extraction rate of Yasemin and Anber varieties was increased at 14% and 10% MC, respectively. For cooked properties, 10% MC of Anber was the best in terms of rice elongation, while 16% MC was the best for Yasemin variety.
DOI: 10.6084/m9.figshare.9276137
title: The establishment of a bacterial expression system for peptides derived from the vegetable enzyme RuBisCO

description: Abstract The objective of this research was to establish a bacterial expression system for peptides derived from the in silico simulated proteolysis of the enzyme ribulose-1,5-bisphosphate carboxylase/oxygenase obtained from soybeans, aiming to make a sustainable method for the production of these molecules feasible for future industrial application. Firstly, the Escherichia coli S17-1 strain was made calcium-competent for the propagation of the expression plasmid pET-30a(+), carrying the coding insert for the peptide sequence GSIKAFKEATKVDKVVVLWTALVPR. After plasmid DNA extraction, the material collected was transformed into high-efficient E. coli Rosetta™(DE3)pLysS cells. Rosetta cells carrying the expression plasmid were then induced and peptide production verified through vertical gel electrophoresis, confirming the establishment of a viable expression system for heterologous peptides. Thus, the larger scale production of RuBisCO-derived peptides – along with future purification and activation steps – became possible. In addition, the method set forth herein may also be applied to different peptidic sequences with antimicrobial activity.
DOI: 10.6084/m9.figshare.9276143.v1
title: Polyunsaturated fatty acids and nutritional quality of five freshwater fish species cultivated in the western region of Santa Catarina, Brazil

description: Abstract There is a paucity of information about the chemical composition of commercially important freshwater fish species (Nile tilapia, bighead carp, grass carp, common carp and silver carp) cultivated in the western region of Santa Catarina, Brazil. This study determined the moisture, ash, protein and lipid contents and the fatty acid composition, as well as the nutritional quality of the lipids in fillets of these five freshwater fish species. Moisture was the most prominent fish component (74.7%-81.7%), followed by protein (15.8%-18.8%) and lipids (0.4%-8.2%). Saturated palmitic acid (90-1740 mg/100 g) and monounsaturated oleic acid (70-2260 mg/100 g) were the major fatty acids found in all the fish species. The grass and common carps and Nile tilapia (caged) had high contents of γ-linolenic acid (GLA), with an average of 536 mg/100 g. Bighead carp was the richest source of ω-3 PUFA, mainly eicosapentaenoic (EPA, 400 mg/100 g) and docosahexaenoic (DHA, 620 mg/100 g) acids, and had the highest ω-3/ω-6 ratio of 6.11. The nutritional evaluation of the fatty acid profile indicated that average values were: atherogenicity index (AI) ~0.59, thrombogenicity index (TI) ~0.82, hypocholesterolemic/hypercholesterolemic ratio (H/H ~1.98), polyunsaturated/saturated ratio (P/S) ~0.43 and ω-3/ω-6 ratio ~2.18, values suggesting that the consumption of these freshwater fish species could be of benefit to human health.
DOI: 10.6084/m9.figshare.9276134
title: Congenital granular cell epulis: case report and differential diagnosis

description: ABSTRACT A 16-days-old female patient exhibiting an exophytic nodular lesion located at anterior maxilla on the alveolar ridge since birth. The clinical hypothesis of congenital granular cell epulis (CGCE) was established, and the patient underwent excisional biopsy. Microscopically, a sheet-like proliferation of eosinophilic cells with granular cytoplasm was observed in a stroma of vascularized fibrous connective tissue. The immunohistochemical analysis for S100 evidenced the absence of immunostaining. The CGCE hypothesis was confirmed and, after six months, the patient showed no signs of recurrence of the lesion.
DOI: 10.6084/m9.figshare.9276131
title: Therapeutic evaluation of magnetic hyperthermia using Fe3O4-aminosilane-coated iron oxide nanoparticles in glioblastoma animal model

description: ABSTRACT Objective: To evaluate the potential of magnetic hyperthermia using aminosilane-coated superparamagnetic iron oxide nanoparticles in glioblastoma tumor model. Methods: The aminosilane-coated superparamagnetic iron oxide nanoparticles were analyzed as to their stability in aqueous medium and their heating potential through specific absorption rate, when submitted to magnetic hyperthermia with different frequencies and intensities of alternating magnetic field. In magnetic hyperthermia in vitro assays, the C6 cells cultured and transduced with luciferase were analyzed by bioluminescence in the absence/presence of alternating magnetic field, and also with and without aminosilane-coated superparamagnetic iron oxide nanoparticles. In the in vivo study, the measurement of bioluminescence was performed 21 days after glioblastoma induction with C6 cells in rats. After 24 hours, the aminosilane-coated superparamagnetic iron oxide nanoparticles were implanted in animals, and magnetic hyperthermia was performed for 40 minutes, using the best conditions of frequency and intensity of alternating magnetic field tested in the in vitro study (the highest specific absorption rate value) and verified the difference of bioluminescence before and after magnetic hyperthermia. Results: The aminosilane-coated superparamagnetic iron oxide nanoparticles were stable, and their heating capacity increased along with higher frequency and intensity of alternating magnetic field. The magnetic hyperthermia application with 874kHz and 200 Gauss of alternating magnetic field determined the best value of specific absorption rate (194.917W/g). When these magnetic hyperthermia parameters were used in in vitro and in vivo analysis, resulted in cell death of 52.0% and 32.8%, respectively, detected by bioluminescence. Conclusion: The magnetic hyperthermia was promissing for the therapeutical process of glioblastoma tumors in animal model, using aminosilane-coated superparamagnetic iron oxide nanoparticles, which presented high specific absorption rate.
DOI: 10.6084/m9.figshare.9276137.v1
title: The establishment of a bacterial expression system for peptides derived from the vegetable enzyme RuBisCO

description: Abstract The objective of this research was to establish a bacterial expression system for peptides derived from the in silico simulated proteolysis of the enzyme ribulose-1,5-bisphosphate carboxylase/oxygenase obtained from soybeans, aiming to make a sustainable method for the production of these molecules feasible for future industrial application. Firstly, the Escherichia coli S17-1 strain was made calcium-competent for the propagation of the expression plasmid pET-30a(+), carrying the coding insert for the peptide sequence GSIKAFKEATKVDKVVVLWTALVPR. After plasmid DNA extraction, the material collected was transformed into high-efficient E. coli Rosetta™(DE3)pLysS cells. Rosetta cells carrying the expression plasmid were then induced and peptide production verified through vertical gel electrophoresis, confirming the establishment of a viable expression system for heterologous peptides. Thus, the larger scale production of RuBisCO-derived peptides – along with future purification and activation steps – became possible. In addition, the method set forth herein may also be applied to different peptidic sequences with antimicrobial activity.
DOI: 10.6084/m9.figshare.9276125
title: The Development of Multiplicative Calculation Flexibility by 3rd Grade Students

description: Abstract This article aims to understand how the students develop the multiplicative calculation flexibility in a context of exploratory teaching, answering three research questions: (i) What are the strategies used by students when solving multiplication tasks?; (ii) How do the strategies used by the students evolve?; and (iii) How do the students use the multiplicative calculation in a flexible manner? The investigation adopts a qualitative methodology within an interpretive paradigm having been held a teaching experience in a 3rd grade classroom. The data collection took place through the following techniques: participant observation and documentary collection. The article focuses only one pair of students. The results show that students used multiple strategies to solve tasks involving multiplication, evolving from additive strategies, associated with sequences of multiples, to multiplicative strategies, establishing numerical relationships, and using known basic multiplication facts and properties. This evolution is associated to the development of multiplicative calculation flexibility by the students, which is initially anchored in organizing the objects in equal parts, evidencing, at the end of the teaching experience, a clear connection between the idea of the same product being symbolized by a high number of multiplicative decompositions, the operation of division and the identification of the proportional relationship. The study shows the lack of parallelism between the development of multiplicative strategies in calculation and proportional situations.
DOI: 10.6084/m9.figshare.9276128
title: SOFT-TISSUE INJURY TO THE FOOT AND ANKLE: LITERATURE REVIEW AND STAGED MANAGEMENT PROTOCOL

description: ABSTRACT Complex trauma of the foot and ankle is characterized by fractures with severe soft tissue damage associated with neurovascular injury and joint involvement. These injuries are frequently present in the polytraumatized patient and are a predictor of unfavorable clinical outcome. In the initial approach to a patient with complex foot and ankle trauma, the decision between amputation and reconstruction is crucial. The various existing classification systems are of limited effectiveness and should serve as tools to assist and support a clinical decision rather than as determinants of conduct. In the emergency department, one of two treatment options must be adopted: early complete treatment or staged treatment. The former consists of definitive fixation and immediate skin coverage, using either primary closure (suturing) or flaps, and is usually reserved for less complex cases. Staged treatment is divided into initial and definitive. The objectives in the first phase are: prevention of the progression of ischemia, necrosis and infection. The principles of definitive treatment are: proximal-to-distal bone reconstruction, anatomic foot alignment, fusions in severe cartilage lesions or gross instabilities, stable internal fixation and adequate skin coverage. Level of evidence III, Systematic review of level III studies.
DOI: 10.6084/m9.figshare.9276134.v1
title: Congenital granular cell epulis: case report and differential diagnosis

description: ABSTRACT A 16-days-old female patient exhibiting an exophytic nodular lesion located at anterior maxilla on the alveolar ridge since birth. The clinical hypothesis of congenital granular cell epulis (CGCE) was established, and the patient underwent excisional biopsy. Microscopically, a sheet-like proliferation of eosinophilic cells with granular cytoplasm was observed in a stroma of vascularized fibrous connective tissue. The immunohistochemical analysis for S100 evidenced the absence of immunostaining. The CGCE hypothesis was confirmed and, after six months, the patient showed no signs of recurrence of the lesion.
DOI: 10.6084/m9.figshare.9276122
title: Elaboration and sensory analysis of cookies made from avocado lump flour

description: Abstract A good alternative that has been developed and applied in recent years is the use of residues from the processing of fruits and vegetables. Much of what is discarded from raw materials such as peels, seeds and stems can be reused in the production of novel foods. The objective of this work was to develop and evaluate the acceptance of cookie elaborated from avocado lump flour. Three formulations were used in the cookie development: F1 (biscuit formulation added with 5% of avocado lump flour); F2 (biscuit formulation added with 10% of avocado lump flour); and F3 (biscuit formulation added with 20% of avocado lump flour). After elaboration, cookies were evaluated for physical-chemical characteristics (moisture, ashes, lipids, proteins, carbohydrates and caloric value) and sensorial characteristics (acceptability of appearance, color, texture and taste attributes, besides purchase intention). Among the formulations tested, F1 (biscuit formulation added with 5% of avocado lump flour) was well accepted by the tasters, since it presented the highest scores on the sensorial attributes evaluated and an above-average purchase intention (70%). Thus, this study demonstrated the importance of the integral use of residues from the processing of plant originated products in new products development, with potential for commercialization and a higher nutritional value.