cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.9900044
title: The addition of the thermophilic esterase EST2 influences the fatty acids and volatile compound profiles of semi hard cheeses

description: Abstract During cheese ripening the hydrolytic activities of proteases and lipases are essential to develop typical flavours; usually these activities come from lactic bacteria. A way to increase cheese flavour and/or to reduce the time of ripening is the addition of exogenous enzymes during cheese making. Actually some commercial lipases are used in cheese making, here we have evaluated the effect of the addition of the thermophilic esterase EST2, from Alyciclobacillus acidocaldarius, on the lipolysis and volatile compounds profiles of semi-hard cheeses. The addition of EST2 produced an increase of the degree of lipolysis up to 30% and the relative proportion of short- and medium- chain fatty acids, with respect to the control cheese. By SPME-GC-FID/MS were identified 27 and 31 volatile compounds in control and EST2-added cheeses, respectively; showing higher values than control for almost all compounds studied. EST2 addition during cheese making intensified the production of flavour compounds, suggesting a preferential release of short chain fatty acids. Considering that esterases have a different mechanism of action respect to lipases and EST2 is much more stable respect to all the commercial lipases, it could be an interesting technological tool to improve the sensory quality or to accelerate cheese ripening.
DOI: 10.6084/m9.figshare.9900035
title: Modification of the Crystalline Structure of ZnO Nanoparticles Embedded Within a SiO2 Matrix due to Thermal Stress Effects

description: Self-assembled nanocrystals of ZnO were embedded within a SiO2 matrix by a sequential deposit using reactive R.F. sputtering. The ZnO nanoparticles (NP’s) were obtained by depositing a very thin layer (~20 nm) of Zn on the bottom of the valleys of a first SiO2 rough surface and then covered by another SiO2 layer at 500 ºC. The stress produced, due to the cooling process, by the SiO2 matrix on the ZnO NP’s generates an unusual crystalline phase of ZnO. The crystal structure was determined by means of X ray diffraction patterns. The ZnO + SiO2 composite shows a transmittance higher than 80 % for wavelengths &gt; 450 nm. Optical absorption allows to reveal the character and value of the optical band gap. Vibrational modes of the material were determined by Raman spectroscopy.
DOI: 10.6084/m9.figshare.9900044.v1
title: The addition of the thermophilic esterase EST2 influences the fatty acids and volatile compound profiles of semi hard cheeses

description: Abstract During cheese ripening the hydrolytic activities of proteases and lipases are essential to develop typical flavours; usually these activities come from lactic bacteria. A way to increase cheese flavour and/or to reduce the time of ripening is the addition of exogenous enzymes during cheese making. Actually some commercial lipases are used in cheese making, here we have evaluated the effect of the addition of the thermophilic esterase EST2, from Alyciclobacillus acidocaldarius, on the lipolysis and volatile compounds profiles of semi-hard cheeses. The addition of EST2 produced an increase of the degree of lipolysis up to 30% and the relative proportion of short- and medium- chain fatty acids, with respect to the control cheese. By SPME-GC-FID/MS were identified 27 and 31 volatile compounds in control and EST2-added cheeses, respectively; showing higher values than control for almost all compounds studied. EST2 addition during cheese making intensified the production of flavour compounds, suggesting a preferential release of short chain fatty acids. Considering that esterases have a different mechanism of action respect to lipases and EST2 is much more stable respect to all the commercial lipases, it could be an interesting technological tool to improve the sensory quality or to accelerate cheese ripening.
DOI: 10.6084/m9.figshare.9900029
title: Memory impairments and increased GFAP expression in hippocampal astrocytes following hypercaloric diet in rats

description: ABSTRACT Objective: Hypothalamic inflammation and glial fibrillary acidic protein (GFAP) overexpression in astrocytes are well described in obese animals, as are some cognitive and memory deficits. As the hippocampus plays important roles in the consolidation of information, this investigation aimed to observe the memory function and the astrocyte expression of GFAP in the hippocampus of rats that received either a hypercaloric or a normocaloric diet. Methods: Adult male Wistar rats received a high-fat (cafeteria) or a standard diet for 60 days. On the 61st day, the rats were submitted to the novel object recognition (NOR) test at three and 24 hours after the first contact with objects, to assess short-term and long-term memory, respectively. Thereafter, the rats were euthanized and their brains were collected for GFAP immunohistochemical investigation in the hippocampus (CA1, CA2, CA3 areas) and hypothalamus (periventricular and arcuate nuclei). Astrocytic reactivity was assessed by morphometry. Different white adipose tissue depots and brown adipose tissue were weighed to calculate the adiposity index. Results: The hypercaloric diet increased body weight gain, adiposity index, white adipose tissue weight (epididymal, subcutaneous and retroperitoneal) and brown adipose tissue weight. Rats fed with the hypercaloric diet showed short-term and long-term memory impairments in the NOR test, as well as increased GFAP expression in astrocytes from all analyzed hypothalamic and hippocampal areas. Conclusion: This astrogliosis suggests that the neuroinflammatory response also occurs in the hippocampus and may be involved in the memory losses observed in obese/overweight animals.
DOI: 10.6084/m9.figshare.9900035.v1
title: Modification of the Crystalline Structure of ZnO Nanoparticles Embedded Within a SiO2 Matrix due to Thermal Stress Effects

description: Self-assembled nanocrystals of ZnO were embedded within a SiO2 matrix by a sequential deposit using reactive R.F. sputtering. The ZnO nanoparticles (NP’s) were obtained by depositing a very thin layer (~20 nm) of Zn on the bottom of the valleys of a first SiO2 rough surface and then covered by another SiO2 layer at 500 ºC. The stress produced, due to the cooling process, by the SiO2 matrix on the ZnO NP’s generates an unusual crystalline phase of ZnO. The crystal structure was determined by means of X ray diffraction patterns. The ZnO + SiO2 composite shows a transmittance higher than 80 % for wavelengths &gt; 450 nm. Optical absorption allows to reveal the character and value of the optical band gap. Vibrational modes of the material were determined by Raman spectroscopy.
DOI: 10.6084/m9.figshare.9900041.v1
title: Evaluation of the Acid Baking Technique to Decrease the Phosphorus Content of the Iron Ore

description: Unlike the available mineral resources, the steelmaking processes have demanded raw material with lower phosphorus content to decrease the costs, energy use, and the residue generated within the steel plant. One alternative is to develop pretreatment of the iron ore concentrates producing raw materials with lower phosphorus. Depending on the mineral structure, a heat treatment combined with leaching could be an efficient way to achieve concentrates with low phosphorus (less than 0.01%), suitable for steelmaking processes. A fast and efficient way of applying energy to iron ore particles is the use of microwave to heat the particles. Thus, we propose a treatment using microwave heating while mixing with a dilute aqueous solution of sulfuric acid, followed by quenching during leaching with water, as a feasible route for the phosphorus removal from iron ore particles. We performed a design of experiment (DOE) to investigate the optimal conditions of heating and leaching, which maximize the rate of phosphorus removal. The structure of the iron ore particles after their treatment with microwave energy was observed by scanning electron microscopy (SEM). Thus, we analyze the optimal conditions for heating and leaching, the structure of the iron ore particles and which mechanism and rate equations are controlling the phosphorus removal. The results indicated that the average heating time is 10 min, the size of the crack of the order of 20µm and a leaching time of 8 min are adequate to achieve less than 0.01% of phosphorus. We demonstrated that under the most favorable combination of conditions for heating followed by leaching proposed in this study, the removal of the phosphorus content in the iron ore samples could reach 100%.
DOI: 10.6084/m9.figshare.9900023
title: PORTUGUESE AS A SECOND LANGUAGE: THE WRITING OF DEAF PEOPLE IN COLLECTIVE LEARNING

description: ABSTRACT The purpose of this article is to describe and analyze the process of writing in Portuguese as a second language developed by deaf participants in workshops. For this, a work of textual production was proposed through the collective rewriting of an adventure story, by confabulations between deaf couples and listening educators, by using Libras as the language of interlocution. It was observed the evolution of deaf participants in the organization of writing, from the recovery of the logical sequence by principles of cohesion and coherence, through the establishment of syntactic order by verbal adequacy according to discursive and textual requirements, until awakening to conscious use of the prepositions and the adjectives in the resolution of questions of communication and of narrativity of its statements.
DOI: 10.6084/m9.figshare.9900032
title: Lower Susceptibility of Laser-irradiated Ti-15Mo Surface to Methicillin-resistant Staphylococcus aureus Cells Adhesion

description: Extensive data reported the influence of the physicochemical properties on the bacterial adhesion in biomaterials, of which surface roughness of titanium (Ti) can dictates methicillin-resistant Staphylococcus aureus (MRSA) adhesion to orthopedic implants. Herein, we investigated the influence of the Yb:YAG laser texturing of titanium-15molybdenum (TiMo-L) surface on the MRSA (ATCC #33591) cells adhesion and viability. The physicochemical properties and antibacterial performance of TiMo-L were compared to samples of laser-irradiated pure titanium (Ti-L). Polished samples (Ti-P and TiMo-P) were used as controls. Laser textured surfaces presented a high degree of hydrophilicity, an irregular-shaped cavity and a typical microstructured pattern, compared to the polished substrates. The laser irradiation reduced the peaks of molybdenum (Mo) in the surface of Ti-15Mo alloy, which is explained, at least in part, by the difference between the melting point of Ti (1.668 ºC) and Mo (2.623 ºC). Laser texturing raised the MRSA cells viability and statistically increased the bacterial adhesion to pure Ti (P &lt; 0.01; Wilcoxon-Signed rank test) and Ti-15Mo alloy (P &lt; 0.001; Paired t test). The TiMo-L surface was significantly less susceptible to MRSA cell adhesion compared to Ti-L substrate (P &lt; 0.001; Paired t test).
DOI: 10.6084/m9.figshare.9900020
title: (META)PRAGMATICS OF LINGUISTIC VIOLENCE: PATHOLOGIZATION OF TRANS LIVES IN COMMENTS ONLINE

description: ABSTRACT This article aims to construct contingent intelligibilities about interactive events marked by linguistic violence practiced against trans people, from the pragmatic (meta) analysis of speech acts in circulation in online commentaries. In this sense, the results of a qualitative, ethnographic-inspired research conducted by the author between July 2015 and July 2016 are presented and discussed in the comments section of the Brazilian news site G1, in three journalistic articles related to the staging of a crucifixion performed by actress and transsexual model Viviany Beleboni during the 19th edition of the LGBT Pride Parade in São Paulo. From the theoretical point of view, knowledge about the notion of language as performance, discussions about linguistic violence and the process of pathologization of trans lives are mobilized. In the analytical work undertaken, we focused on the interpretation of linguistic contextualization clues, indexicality dynamics and the processes of entextualization triggered by the participants in their online commentaries. Thus, due to the adopted view of the data generated, what is observed is the production of a pragmatic (meta) pragmatics engaged in the reestablishment of violent contexts, related to pathological medical-scientific discourses, with a view to providing illocutionary force with the acts of speaks transphobic, capable of subalternizing and hurting trans people through language. In this way, our research allowed us to highlight the potential of an undisciplined and decentralized model of language research, committed to the understanding of semiotic practices in the elaboration of social reality, particularly in times of high reflexivity and intense textual transits.
DOI: 10.6084/m9.figshare.9900020.v1
title: (META)PRAGMATICS OF LINGUISTIC VIOLENCE: PATHOLOGIZATION OF TRANS LIVES IN COMMENTS ONLINE

description: ABSTRACT This article aims to construct contingent intelligibilities about interactive events marked by linguistic violence practiced against trans people, from the pragmatic (meta) analysis of speech acts in circulation in online commentaries. In this sense, the results of a qualitative, ethnographic-inspired research conducted by the author between July 2015 and July 2016 are presented and discussed in the comments section of the Brazilian news site G1, in three journalistic articles related to the staging of a crucifixion performed by actress and transsexual model Viviany Beleboni during the 19th edition of the LGBT Pride Parade in São Paulo. From the theoretical point of view, knowledge about the notion of language as performance, discussions about linguistic violence and the process of pathologization of trans lives are mobilized. In the analytical work undertaken, we focused on the interpretation of linguistic contextualization clues, indexicality dynamics and the processes of entextualization triggered by the participants in their online commentaries. Thus, due to the adopted view of the data generated, what is observed is the production of a pragmatic (meta) pragmatics engaged in the reestablishment of violent contexts, related to pathological medical-scientific discourses, with a view to providing illocutionary force with the acts of speaks transphobic, capable of subalternizing and hurting trans people through language. In this way, our research allowed us to highlight the potential of an undisciplined and decentralized model of language research, committed to the understanding of semiotic practices in the elaboration of social reality, particularly in times of high reflexivity and intense textual transits.
DOI: 10.6084/m9.figshare.9900029.v1
title: Memory impairments and increased GFAP expression in hippocampal astrocytes following hypercaloric diet in rats

description: ABSTRACT Objective: Hypothalamic inflammation and glial fibrillary acidic protein (GFAP) overexpression in astrocytes are well described in obese animals, as are some cognitive and memory deficits. As the hippocampus plays important roles in the consolidation of information, this investigation aimed to observe the memory function and the astrocyte expression of GFAP in the hippocampus of rats that received either a hypercaloric or a normocaloric diet. Methods: Adult male Wistar rats received a high-fat (cafeteria) or a standard diet for 60 days. On the 61st day, the rats were submitted to the novel object recognition (NOR) test at three and 24 hours after the first contact with objects, to assess short-term and long-term memory, respectively. Thereafter, the rats were euthanized and their brains were collected for GFAP immunohistochemical investigation in the hippocampus (CA1, CA2, CA3 areas) and hypothalamus (periventricular and arcuate nuclei). Astrocytic reactivity was assessed by morphometry. Different white adipose tissue depots and brown adipose tissue were weighed to calculate the adiposity index. Results: The hypercaloric diet increased body weight gain, adiposity index, white adipose tissue weight (epididymal, subcutaneous and retroperitoneal) and brown adipose tissue weight. Rats fed with the hypercaloric diet showed short-term and long-term memory impairments in the NOR test, as well as increased GFAP expression in astrocytes from all analyzed hypothalamic and hippocampal areas. Conclusion: This astrogliosis suggests that the neuroinflammatory response also occurs in the hippocampus and may be involved in the memory losses observed in obese/overweight animals.
DOI: 10.6084/m9.figshare.9900032.v1
title: Lower Susceptibility of Laser-irradiated Ti-15Mo Surface to Methicillin-resistant Staphylococcus aureus Cells Adhesion

description: Extensive data reported the influence of the physicochemical properties on the bacterial adhesion in biomaterials, of which surface roughness of titanium (Ti) can dictates methicillin-resistant Staphylococcus aureus (MRSA) adhesion to orthopedic implants. Herein, we investigated the influence of the Yb:YAG laser texturing of titanium-15molybdenum (TiMo-L) surface on the MRSA (ATCC #33591) cells adhesion and viability. The physicochemical properties and antibacterial performance of TiMo-L were compared to samples of laser-irradiated pure titanium (Ti-L). Polished samples (Ti-P and TiMo-P) were used as controls. Laser textured surfaces presented a high degree of hydrophilicity, an irregular-shaped cavity and a typical microstructured pattern, compared to the polished substrates. The laser irradiation reduced the peaks of molybdenum (Mo) in the surface of Ti-15Mo alloy, which is explained, at least in part, by the difference between the melting point of Ti (1.668 ºC) and Mo (2.623 ºC). Laser texturing raised the MRSA cells viability and statistically increased the bacterial adhesion to pure Ti (P &lt; 0.01; Wilcoxon-Signed rank test) and Ti-15Mo alloy (P &lt; 0.001; Paired t test). The TiMo-L surface was significantly less susceptible to MRSA cell adhesion compared to Ti-L substrate (P &lt; 0.001; Paired t test).
DOI: 10.6084/m9.figshare.9900011
title: Effects of nutritional plans and genetic groups on performance, carcass and meat quality traits of finishing pigs

description: Abstract We aimed to evaluate the effects of paternal genotypes (Piau, Duroc-based, and Pietrain) and nutritional plans with different digestible lysine contents (Low, Medium, and High) on performance, carcass, and meat quality traits of pigs. Pietrain and Duroc crossbred barrows and gilts were similar in performance and carcass traits and had the greatest values when compared to Piau crossbred pigs. Regarding meat quality, drip loss was greater in pork from Pietrain crossbred barrows and gilts compared to Duroc and Piau crossbred pigs. The High nutritional plan had the greatest daily digestible lysine intake value, followed by the Medium and Low nutritional plans. Most of the performance, carcass, and meat quality traits that were evaluated in barrows and gilts were not affected by the nutritional plans. In general, Duroc and Pietrain crossbred pigs had a greater performance and carcass yield when compared to Piau crossbred pigs.
DOI: 10.6084/m9.figshare.9900014
title: SPATIO-TEMPORAL MAPPING OF THE INVASIVE ALIEN SPECIES Pinus SP IN THE NORTHERN AREA OF THE LAGOA DO PEIXE NATIONAL PARK-RS

description: ABSTRACT A problem of global dimensions, the occupation of areas by invasive alien species is studied in this paper focusing on the increasing presence of Pinus sp in the Lagoa do Peixe National Park, at Rio Grande do Sul State, Brazil. From satellite imagery and the use of remote sensing and geoprocessing techniques, this paper presents a space-time mapping of the presence of this invasive alien species in the northern area of the Park, from 1985 to the 2017. Planted and disseminated areas of Pinus were mapped through visual analysis and pixel classification by the Spectral Angle Mapper (SAM) method, using images from the Landsat and Rapid Eye satellites. The results showed a constant growth rate in the areas of Pinus, with acceleration at the end of the analyzed period, confirming the invasive capacity of Pinus sp and the dispersion of their seeds by the wind. The excellent performance of the SAM algorithm in the identification of Pinus areas was demonstrated, as well as the importance of the use of satellite images in the analysis of the question.
DOI: 10.6084/m9.figshare.9900023.v1
title: PORTUGUESE AS A SECOND LANGUAGE: THE WRITING OF DEAF PEOPLE IN COLLECTIVE LEARNING

description: ABSTRACT The purpose of this article is to describe and analyze the process of writing in Portuguese as a second language developed by deaf participants in workshops. For this, a work of textual production was proposed through the collective rewriting of an adventure story, by confabulations between deaf couples and listening educators, by using Libras as the language of interlocution. It was observed the evolution of deaf participants in the organization of writing, from the recovery of the logical sequence by principles of cohesion and coherence, through the establishment of syntactic order by verbal adequacy according to discursive and textual requirements, until awakening to conscious use of the prepositions and the adjectives in the resolution of questions of communication and of narrativity of its statements.
DOI: 10.6084/m9.figshare.9900008
title: DIFFERENT TYPES OF RETURN TO SCALE IN DEA

description: ABSTRACT The format of the efficient frontier is an important measure of technical efficiency; additionally, it determines the type of return to scale verified by the model. The classical Data Envelopment Analysis (DEA) model, CCR (Charnes et al., 1978), assumes constant returns to scale; conversely, the BCC (Banker et al., 1984) model presents a concave downward efficient frontier that presumes variable returns to scale. This study examines how different returns to scale can be revealed in DEA, considering the possibility of the existence of a concave upward efficient frontier. This kind of frontier, not yet explored by the DEA literature, can also represent viable production, seeing that an increase of the inputs causes an increase of the outputs. Considering this, a concave upward efficient frontier presents a variable return to scale, but with different characteristics from those of the concave downward BCC efficient frontier. This proposal is important because it considers the possibility of an efficient frontier that represents different samples of decision-making units (DMUs). An upward curve would better represent DMUs of smaller production scales that have increased marginal productivity but cannot act as efficiently as larger scale units.
DOI: 10.6084/m9.figshare.9900011.v1
title: Effects of nutritional plans and genetic groups on performance, carcass and meat quality traits of finishing pigs

description: Abstract We aimed to evaluate the effects of paternal genotypes (Piau, Duroc-based, and Pietrain) and nutritional plans with different digestible lysine contents (Low, Medium, and High) on performance, carcass, and meat quality traits of pigs. Pietrain and Duroc crossbred barrows and gilts were similar in performance and carcass traits and had the greatest values when compared to Piau crossbred pigs. Regarding meat quality, drip loss was greater in pork from Pietrain crossbred barrows and gilts compared to Duroc and Piau crossbred pigs. The High nutritional plan had the greatest daily digestible lysine intake value, followed by the Medium and Low nutritional plans. Most of the performance, carcass, and meat quality traits that were evaluated in barrows and gilts were not affected by the nutritional plans. In general, Duroc and Pietrain crossbred pigs had a greater performance and carcass yield when compared to Piau crossbred pigs.