Pub Date : 2022-06-27DOI: 10.48141/sbjchem.21scon.01_lima.pdf
F. Lima
In this work, molecular models were obtained, and the reactivity parameters of ε-caprolactam and ophenanthroline were calculated to evaluate the interaction in the formation of complex molecular compounds. It was observed that the main electron donor atoms, in the formation of the metal-ligand bond, are centered mainly on the oxygen and nitrogen atoms, respectively, which are sterically more favorable in these species. Conductance measurements in an aqueous solution were obtained to observe the electrolytic behavior of these compounds. Infrared spectra were also recorded to characterize vibrational transitions in identifying these species when present in complex systems. Molecular spectra of absorption in the UV-visible region were recorded to evaluate the spectrochemical properties of these individual ligands and further verify their influence on the formation of complex molecular systems. The parameters evaluated include the molar absorptivity ε, integrated absorption coefficient, oscillator force, and transition dipole moment. It was observed that the ε parameter indicates molecular transitions in the 190 – 300 nm region and the near-infrared, and the oscillator strength is typical of molecules used as dyes and sensitizers for optical light-emitting systems or light-to-electricity converters.
{"title":"MOLECULAR MODELING, REACTIVITY PARAMETERS AND SPECTROCHEMIC STUDIES OF ε-CAPROLACTAM AND o-PHENANTROLINE","authors":"F. Lima","doi":"10.48141/sbjchem.21scon.01_lima.pdf","DOIUrl":"https://doi.org/10.48141/sbjchem.21scon.01_lima.pdf","url":null,"abstract":"In this work, molecular models were obtained, and the reactivity parameters of ε-caprolactam and ophenanthroline were calculated to evaluate the interaction in the formation of complex molecular compounds. It was observed that the main electron donor atoms, in the formation of the metal-ligand bond, are centered mainly on the oxygen and nitrogen atoms, respectively, which are sterically more favorable in these species. Conductance measurements in an aqueous solution were obtained to observe the electrolytic behavior of these compounds. Infrared spectra were also recorded to characterize vibrational transitions in identifying these species when present in complex systems. Molecular spectra of absorption in the UV-visible region were recorded to evaluate the spectrochemical properties of these individual ligands and further verify their influence on the formation of complex molecular systems. The parameters evaluated include the molar absorptivity ε, integrated absorption coefficient, oscillator force, and transition dipole moment. It was observed that the ε parameter indicates molecular transitions in the 190 – 300 nm region and the near-infrared, and the oscillator strength is typical of molecules used as dyes and sensitizers for optical light-emitting systems or light-to-electricity converters.","PeriodicalId":20606,"journal":{"name":"Proceedings of the SOUTHERN BRAZILIAN JOURNAL OF CHEMISTRY 2021 INTERNATIONAL VIRTUAL CONFERENCE","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82684698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-20DOI: 10.48141/sbjchem.21scon.15_abstract_avila.pdf
Letícia Meirelles Ávila, Erica Cristina Rocha Roier, Renata Fernandes Ferreira de Moraes, T. Marques, Jônathan David Ribas Chagas
Cattle, both beef and dairy, are of great importance for Brazil, as it moves a good part of the country economy. But gastrointestinal infections caused by nematodes cause significant damage to cattle due to weight loss of animals, decreased production index, increased mortality rate, and increased expenses by producers. This work aims to demonstrate the elimination of gastrointestinal nematodes through the use of the leaves of two different banana species in calves and to verify if there are differences in the effectiveness of both. For the study, 30 calves were selected, aged between 3 and 8 months, of both sexes and already fed on pasture. These were divided into three groups. Group A was treated with banana leaves of the Musa sapientum species; Group B – was treated with banana leaves of the Musa acuminata species; Group C – control group, in which no substance was found administered. The feces collection was performed at intervals of 7 days, totaling 3 collections. The samples were taken directly from the animals' rectum, stored in a plastic bag, and placed in a styrofoam container with ice, and then the material was taken to the laboratory for the eggs per gram (eggs/g)examination. It can be concluded that the use of banana leaf proved to be effective in reducing the parasitic load of intestinal nematodes in calves, proving that the use of Musa acuminata was more efficient than the result of the use of Musa sapientum when compared.
{"title":"UTILIZAÇÃO DEBANANA PRATA (MUSASAPIENTUM) E BANANA OURO (MUSAACUMINATA) NO CONTROLE DE NEMATÓIDES GASTROINTESTINAIS DE BEZERROS","authors":"Letícia Meirelles Ávila, Erica Cristina Rocha Roier, Renata Fernandes Ferreira de Moraes, T. Marques, Jônathan David Ribas Chagas","doi":"10.48141/sbjchem.21scon.15_abstract_avila.pdf","DOIUrl":"https://doi.org/10.48141/sbjchem.21scon.15_abstract_avila.pdf","url":null,"abstract":"Cattle, both beef and dairy, are of great importance for Brazil, as it moves a good part of the country economy. But gastrointestinal infections caused by nematodes cause significant damage to cattle due to weight loss of animals, decreased production index, increased mortality rate, and increased expenses by producers. This work aims to demonstrate the elimination of gastrointestinal nematodes through the use of the leaves of two different banana species in calves and to verify if there are differences in the effectiveness of both. For the study, 30 calves were selected, aged between 3 and 8 months, of both sexes and already fed on pasture. These were divided into three groups. Group A was treated with banana leaves of the Musa sapientum species; Group B – was treated with banana leaves of the Musa acuminata species; Group C – control group, in which no substance was found administered. The feces collection was performed at intervals of 7 days, totaling 3 collections. The samples were taken directly from the animals' rectum, stored in a plastic bag, and placed in a styrofoam container with ice, and then the material was taken to the laboratory for the eggs per gram (eggs/g)examination. It can be concluded that the use of banana leaf proved to be effective in reducing the parasitic load of intestinal nematodes in calves, proving that the use of Musa acuminata was more efficient than the result of the use of Musa sapientum when compared.","PeriodicalId":20606,"journal":{"name":"Proceedings of the SOUTHERN BRAZILIAN JOURNAL OF CHEMISTRY 2021 INTERNATIONAL VIRTUAL CONFERENCE","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73535579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-20DOI: 10.48141/sbjchem.21scon.12_abstract_brandolin.pdf
I. Magario, J. Scilipoti, Salvador E. Brandolín
Carboxylic peroxy acids are organic oxidants of relevance in the cosmetic, food, and agrochemical industries. However, they are traditionally used as intermediaries in a process known as Prileschajew epoxidation and synthesized using sulfuric acid as a catalyst, promoting undesirable reactions on the final epoxides. Therefore, the study of selective catalysts such as enzymes is a topic of interest. In this work, peroctanoic acid synthesis was carried out using n-hexane as the solvent and an immobilized Candida Antarctica Lipase B commercial preparation as the catalyst. On the other hand, the oxidant, hydrogen peroxide was supplied as an aqueous solution, comprising the disperse phase of the reacting system. The reaction progression was quantified by iodometric and cerimetric titration of the peroctanoic acid concentration in the hexane phase. Four different initial amounts of octanoic acid were tested (0.74, 1.57, 10, and 20 millimoles). Substrate inhibition by octanoic acid was observed having at 1.57 millimoles the maximum initial reaction rate. The experimental data were fitted to a ping-pong bi-bi enzymatic kinetic model to estimate the initial reaction rate. Since this system constituted a liquid-liquid (organic-aqueous) two-phase system, the model was evaluated employing the thermodynamic activities of all species involved, assuming phase equilibria with time. The activities of all species were estimated using UNIFAC. As a result, the model was able to reproduce the trend of the initial rate with the change of the initial amount of octanoic acid.
{"title":"ACTIVITY-BASED KINETIC MODELLING OF LIPASE CATALYSED SYNTHESIS OF PEROCTANOIC ACID","authors":"I. Magario, J. Scilipoti, Salvador E. Brandolín","doi":"10.48141/sbjchem.21scon.12_abstract_brandolin.pdf","DOIUrl":"https://doi.org/10.48141/sbjchem.21scon.12_abstract_brandolin.pdf","url":null,"abstract":"Carboxylic peroxy acids are organic oxidants of relevance in the cosmetic, food, and agrochemical industries. However, they are traditionally used as intermediaries in a process known as Prileschajew epoxidation and synthesized using sulfuric acid as a catalyst, promoting undesirable reactions on the final epoxides. Therefore, the study of selective catalysts such as enzymes is a topic of interest. In this work, peroctanoic acid synthesis was carried out using n-hexane as the solvent and an immobilized Candida Antarctica Lipase B commercial preparation as the catalyst. On the other hand, the oxidant, hydrogen peroxide was supplied as an aqueous solution, comprising the disperse phase of the reacting system. The reaction progression was quantified by iodometric and cerimetric titration of the peroctanoic acid concentration in the hexane phase. Four different initial amounts of octanoic acid were tested (0.74, 1.57, 10, and 20 millimoles). Substrate inhibition by octanoic acid was observed having at 1.57 millimoles the maximum initial reaction rate. The experimental data were fitted to a ping-pong bi-bi enzymatic kinetic model to estimate the initial reaction rate. Since this system constituted a liquid-liquid (organic-aqueous) two-phase system, the model was evaluated employing the thermodynamic activities of all species involved, assuming phase equilibria with time. The activities of all species were estimated using UNIFAC. As a result, the model was able to reproduce the trend of the initial rate with the change of the initial amount of octanoic acid.","PeriodicalId":20606,"journal":{"name":"Proceedings of the SOUTHERN BRAZILIAN JOURNAL OF CHEMISTRY 2021 INTERNATIONAL VIRTUAL CONFERENCE","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74707776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-20DOI: 10.48141/sbjchem.21scon.18_abstract_mesquita.pdf
Miguel Pedro Alves da Paz, Iago Santos Mesquita
This work aims to report the experience of teaching a course with practical contents in chemistry in the distance modality due to the period of isolation by the COVID-19 pandemic. The target of the course was students of the Federal Institute of Education, Science, and Technology of Rio de Janeiro (Duque de Caxias campus), who study to be technicians in the field of Chemistry. In order to do so, the importance of experimentation in professional learning is discussed, as well as the difficulty of distance learning in practical training is analyzed. Following the course format and the resources used to overcome the limitations of distance learning and help the students keep the contents in mind are introduced. Student participation was an important component in choosing some themes for the course modules. Realizing the importance of construction that understands them as active subjects in the teaching-learning process, it was possible to offer modules that touched the students reality and expanded their knowledge through comprehensive training. The themes and approaches were proposed to help them define or rethink their career through contact with different realities of the work of a technician in the field of chemistry. The report ends by analyzing how a transdisciplinary education could help students connect knowledge acquired separately and aggregate it to see reality more broadly and completely. The difficulties arising from the COVID-19 pandemic made it possible to discuss a teaching way that would lead students to participate more actively in their training and, dialectically, strengthen pedagogical praxis.
本工作旨在报告因新冠肺炎疫情隔离期间，远程教学化学实践性课程的经验。该课程的目标是里约热内卢联邦教育、科学和技术学院(Duque de Caxias校区)的学生，他们学习成为化学领域的技术人员。为了做到这一点，讨论了实验在专业学习中的重要性，并分析了远程学习在实训中的困难。下面介绍了用于克服远程学习的局限性和帮助学生记住内容的课程格式和资源。学生的参与是选择课程模块主题的重要组成部分。认识到建设的重要性，将他们理解为教学过程中的活跃主体，可以提供触及学生实际的模块，并通过综合培训扩展他们的知识。提出的主题和方法是为了帮助他们通过接触化学领域技术人员工作的不同现实来定义或重新思考他们的职业。报告最后分析了跨学科教育如何帮助学生将单独获得的知识联系起来，并将其整合起来，从而更广泛、更全面地看待现实。面对新冠肺炎疫情带来的困难，探讨如何引导学生更积极地参与培训，辩证地加强教学实践。
{"title":"BONDS, PRACTICE, AND CHEMISTRY: EXPERIENCE REPORT AND REFLECTIONS ON POTENTIALITIES OF TEACHING-LEARNING PROCESS OF CHEMICAL TECHNICIANS IN MIDST OF THE COVID-19 PANDEMIC","authors":"Miguel Pedro Alves da Paz, Iago Santos Mesquita","doi":"10.48141/sbjchem.21scon.18_abstract_mesquita.pdf","DOIUrl":"https://doi.org/10.48141/sbjchem.21scon.18_abstract_mesquita.pdf","url":null,"abstract":"This work aims to report the experience of teaching a course with practical contents in chemistry in the distance modality due to the period of isolation by the COVID-19 pandemic. The target of the course was students of the Federal Institute of Education, Science, and Technology of Rio de Janeiro (Duque de Caxias campus), who study to be technicians in the field of Chemistry. In order to do so, the importance of experimentation in professional learning is discussed, as well as the difficulty of distance learning in practical training is analyzed. Following the course format and the resources used to overcome the limitations of distance learning and help the students keep the contents in mind are introduced. Student participation was an important component in choosing some themes for the course modules. Realizing the importance of construction that understands them as active subjects in the teaching-learning process, it was possible to offer modules that touched the students reality and expanded their knowledge through comprehensive training. The themes and approaches were proposed to help them define or rethink their career through contact with different realities of the work of a technician in the field of chemistry. The report ends by analyzing how a transdisciplinary education could help students connect knowledge acquired separately and aggregate it to see reality more broadly and completely. The difficulties arising from the COVID-19 pandemic made it possible to discuss a teaching way that would lead students to participate more actively in their training and, dialectically, strengthen pedagogical praxis.","PeriodicalId":20606,"journal":{"name":"Proceedings of the SOUTHERN BRAZILIAN JOURNAL OF CHEMISTRY 2021 INTERNATIONAL VIRTUAL CONFERENCE","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80952832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-20DOI: 10.48141/sbjchem.21scon.37_abstract_babatunde.pdf
E. O. Babatunde, F. Aderibigbe, Joseph Isaac Adekunle, Paul Oluwatobi, C. Are
The current investigation emphasizes preparing low-cost carbon-based zirconium impregnated heterogeneous catalysts from wood dust to produce biodiesel from waste vegetable oil (WVO). Response Surface Methodology via Central Composite Design (RSM-CCD) optimized the biodiesel production process. The physico-chemical properties of waste vegetable methyl ester were determined following the American Standard Testing of Materials (ASTM). The optimum conditions were observed to be 8:1 methanol/oil ratio, 5 wt% catalyst loading, 55°C temperature, and 3 h reaction time. The corresponding response was observed to be 98.39%. The catalyst morphology and elemental composition were determined using Scanning Electron Microscopy (SEM) and Energy-Dispersive X-ray (EDX), respectively. The experimental analysis confirmed that the synthesized catalyst from wood dust under optimized conditions can transesterify WVO into biodiesel.
{"title":"OPTIMIZATION OF BIODIESEL PRODUCTION FROM WASTE VEGETABLE OIL USING Zr- OXIDE CATALYST ANCHORED ON CARBONIZED MATERIAL","authors":"E. O. Babatunde, F. Aderibigbe, Joseph Isaac Adekunle, Paul Oluwatobi, C. Are","doi":"10.48141/sbjchem.21scon.37_abstract_babatunde.pdf","DOIUrl":"https://doi.org/10.48141/sbjchem.21scon.37_abstract_babatunde.pdf","url":null,"abstract":"The current investigation emphasizes preparing low-cost carbon-based zirconium impregnated heterogeneous catalysts from wood dust to produce biodiesel from waste vegetable oil (WVO). Response Surface Methodology via Central Composite Design (RSM-CCD) optimized the biodiesel production process. The physico-chemical properties of waste vegetable methyl ester were determined following the American Standard Testing of Materials (ASTM). The optimum conditions were observed to be 8:1 methanol/oil ratio, 5 wt% catalyst loading, 55°C temperature, and 3 h reaction time. The corresponding response was observed to be 98.39%. The catalyst morphology and elemental composition were determined using Scanning Electron Microscopy (SEM) and Energy-Dispersive X-ray (EDX), respectively. The experimental analysis confirmed that the synthesized catalyst from wood dust under optimized conditions can transesterify WVO into biodiesel.","PeriodicalId":20606,"journal":{"name":"Proceedings of the SOUTHERN BRAZILIAN JOURNAL OF CHEMISTRY 2021 INTERNATIONAL VIRTUAL CONFERENCE","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90878516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-20DOI: 10.48141/sbjchem.21scon.16_abstract_nonato.pdf
Manuelly Rufino Nonato, Renata Fernandes Ferreira Moraes, Letícia Meirelles Ávila, Ana Cláudia Tavares Vieira, E. C. R. Roier
Raising horses has become increasingly important over the years, generating great income for breeders and contributing to the economy of the entire country. Dental care with these animals occurs less frequently than necessary, which causes weakness and loss of performance in them. Infundibular disease is a dental disorder, defined as a necrotizing bacteriosis characterized by destroying the inorganic material of the dental tissues, affecting mainly the premolar and molar teeth. This pathology may predispose to other alterations such as colic syndrome, gingivitis, difficulty in feeding, and consequent weight loss, besides resistance in the adaptation to mouth movements, which cause significant losses to the breeders. Its diagnosis is made through anamnesis, general and specific clinical examination of the oral cavity, and complementary exams, such as x-ray. This paper reports the case of a 13-year-old horse weighing about 400 kg of live weight, whose chosen treatment was the extraction of the affected tooth. The study aimed to review predisposing factors, diagnosis, the effects that this clinical change can cause on the animal’s organism, and infundibular disease treatment, describing the therapy used and its results.
{"title":"EQUINE (Equus caballus) INFUNDIBULAR DISEASE: CASE REPORT","authors":"Manuelly Rufino Nonato, Renata Fernandes Ferreira Moraes, Letícia Meirelles Ávila, Ana Cláudia Tavares Vieira, E. C. R. Roier","doi":"10.48141/sbjchem.21scon.16_abstract_nonato.pdf","DOIUrl":"https://doi.org/10.48141/sbjchem.21scon.16_abstract_nonato.pdf","url":null,"abstract":"Raising horses has become increasingly important over the years, generating great income for breeders and contributing to the economy of the entire country. Dental care with these animals occurs less frequently than necessary, which causes weakness and loss of performance in them. Infundibular disease is a dental disorder, defined as a necrotizing bacteriosis characterized by destroying the inorganic material of the dental tissues, affecting mainly the premolar and molar teeth. This pathology may predispose to other alterations such as colic syndrome, gingivitis, difficulty in feeding, and consequent weight loss, besides resistance in the adaptation to mouth movements, which cause significant losses to the breeders. Its diagnosis is made through anamnesis, general and specific clinical examination of the oral cavity, and complementary exams, such as x-ray. This paper reports the case of a 13-year-old horse weighing about 400 kg of live weight, whose chosen treatment was the extraction of the affected tooth. The study aimed to review predisposing factors, diagnosis, the effects that this clinical change can cause on the animal’s organism, and infundibular disease treatment, describing the therapy used and its results.","PeriodicalId":20606,"journal":{"name":"Proceedings of the SOUTHERN BRAZILIAN JOURNAL OF CHEMISTRY 2021 INTERNATIONAL VIRTUAL CONFERENCE","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87953141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-20DOI: 10.48141/sbjchem.21scon.11_abstract_lima_ipen.pdf
Daniele de Andrade Villarim Lima, Fabiana Abreu de Rezende, D. Fungaro
Biochar is a potential additive for agricultural soil and can be used as an eco-friendly and economical adsorbent material. Biochar properties are affected by several technological parameters, mainly pyrolysis temperature and feedstock, which differentiation can lead to products with a wide range of characteristics. The biochar sample was produced from wood sawdust at 450˚C via slow pyrolysis and was characterized. Parameters characterized to include: physical properties (bulk density, porosity), chemical properties (composition, pH, conductivity, cation exchange capacity), hydraulic property (water holding capacity), proximate analysis, X-ray diffractometry to obtain information on the mineralogical composition, among others. The analysis of biochar properties is important for determining the biochar application.
{"title":"CHARACTERISTICS OF WOOD SAWDUST-DERIVED BIOCHAR: POTENTIAL AS ADSORBENT MATERIAL","authors":"Daniele de Andrade Villarim Lima, Fabiana Abreu de Rezende, D. Fungaro","doi":"10.48141/sbjchem.21scon.11_abstract_lima_ipen.pdf","DOIUrl":"https://doi.org/10.48141/sbjchem.21scon.11_abstract_lima_ipen.pdf","url":null,"abstract":"Biochar is a potential additive for agricultural soil and can be used as an eco-friendly and economical adsorbent material. Biochar properties are affected by several technological parameters, mainly pyrolysis temperature and feedstock, which differentiation can lead to products with a wide range of characteristics. The biochar sample was produced from wood sawdust at 450˚C via slow pyrolysis and was characterized. Parameters characterized to include: physical properties (bulk density, porosity), chemical properties (composition, pH, conductivity, cation exchange capacity), hydraulic property (water holding capacity), proximate analysis, X-ray diffractometry to obtain information on the mineralogical composition, among others. The analysis of biochar properties is important for determining the biochar application.","PeriodicalId":20606,"journal":{"name":"Proceedings of the SOUTHERN BRAZILIAN JOURNAL OF CHEMISTRY 2021 INTERNATIONAL VIRTUAL CONFERENCE","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84664010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-20DOI: 10.48141/sbjchem.21scon.24_abstract_pereira.pdf
Carlla Alessandra Silva Pereira
COVID-19, first identified in Wuhan, China in 2019, has the SARS-CoV-2 virus as its etiological agent, spread rapidly around the world, became a pandemic and directly impacted the lives of individuals. Due to the advance of the pandemic the means for control was social isolation. Since individuals with autism spectrum disorder have difficulties in social interaction due to cognitive impairment, interpersonal development tends to be more impaired with the beginning of restrictive measures. This study aims to analyze the changes in the routine of individuals with autism spectrum disorder during social isolation. The search was conducted in the PubMed and BVS databases, using the following descriptors from the DECS database: autism spectrum disorder, covid pandemic and anxiety, using the Boolean indicator AND between words in the search fields. The inclusion criterium for the texts were: English, Portuguese and Spanish languages, from 2017 to 2022. As exclusion criterium, articles that did not address the topic were excluded. The study showed that with the closure of schools and migration to remote education, several students developed a regression in social interaction and triggered new psychiatric symptoms due to the change in routine. In compliance with safety protocols, cognitive-behavioral therapies, migrated to the digital medium and were also rejected at first, but were instrumental in controlling the creation and worsening of symptoms. Due to physical and social distancing requirements, individuals with autism spectrum disorder tend to have greater difficulties with social interaction after the COVID-19 pandemic. The change in routine contributes to the worsening of symptoms such as anxiety, aggressiveness, and irritability and can worsen the mental health of parents.
{"title":"IMPACTS CAUSED BY THE COVID-19 PANDEMIC ON PEOPLE WITH AUTISM SPECTRUM DISORDER","authors":"Carlla Alessandra Silva Pereira","doi":"10.48141/sbjchem.21scon.24_abstract_pereira.pdf","DOIUrl":"https://doi.org/10.48141/sbjchem.21scon.24_abstract_pereira.pdf","url":null,"abstract":"COVID-19, first identified in Wuhan, China in 2019, has the SARS-CoV-2 virus as its etiological agent, spread rapidly around the world, became a pandemic and directly impacted the lives of individuals. Due to the advance of the pandemic the means for control was social isolation. Since individuals with autism spectrum disorder have difficulties in social interaction due to cognitive impairment, interpersonal development tends to be more impaired with the beginning of restrictive measures. This study aims to analyze the changes in the routine of individuals with autism spectrum disorder during social isolation. The search was conducted in the PubMed and BVS databases, using the following descriptors from the DECS database: autism spectrum disorder, covid pandemic and anxiety, using the Boolean indicator AND between words in the search fields. The inclusion criterium for the texts were: English, Portuguese and Spanish languages, from 2017 to 2022. As exclusion criterium, articles that did not address the topic were excluded. The study showed that with the closure of schools and migration to remote education, several students developed a regression in social interaction and triggered new psychiatric symptoms due to the change in routine. In compliance with safety protocols, cognitive-behavioral therapies, migrated to the digital medium and were also rejected at first, but were instrumental in controlling the creation and worsening of symptoms. Due to physical and social distancing requirements, individuals with autism spectrum disorder tend to have greater difficulties with social interaction after the COVID-19 pandemic. The change in routine contributes to the worsening of symptoms such as anxiety, aggressiveness, and irritability and can worsen the mental health of parents.","PeriodicalId":20606,"journal":{"name":"Proceedings of the SOUTHERN BRAZILIAN JOURNAL OF CHEMISTRY 2021 INTERNATIONAL VIRTUAL CONFERENCE","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83965930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-20DOI: 10.48141/sbjchem.21scon.21_abstract_mackern.pdf
María Tamara Moreno-Sosa, Daiana Sthefania Garcia, Rocío Heredia, Victor BITTAR-RIVERO-PEDROSA, J. Mackern-Oberti
Prolactin (PRL) displays several functions in the whole body by binding its receptor (PRL-R). Two main PRL-R isoforms are reported that differ in their capacity to trigger signaling pathways, PRL-R long isoform is the activation receptor, and the short isoform is the inhibitory oner. Although many autoimmune diseases display hyperprolactinemia, the role of each PRL-R isoform expression in autoimmunity remains unknown. This work aimed to correlate PRL-R isoforms expression in human peripheral blood mononuclear cells (PBMCs) of female Systemic Lupus Erythematosus patients and healthy controls. To this end, PBMCs from lupus patients (n=9) and healthy controls (n=5) were enriched by the ficoll-hypaque method. Then, RNA extraction, cDNA synthesis, and real-time PCR were performed to determine mRNA expression. We found that PRL-R long and short isoforms expression from lupus patients display similar expression to healthy controls. However, the PRL-RL/PRL-RS ratio is higher than healthy controls (P-value two-tailed <0,05). Additionally, PRL-RL isoform expression correlates with the short isoform in lupus patients (Spearman r 0,8945; 95% confidence interval 0,6834 to 0,9676; P-value two-tailed <0,0001). However, the expression of neither long and short isoforms correlates with active disease nor disease duration. Similarly, lupus patients display similar PRL-R isoforms expression than healthy controls. Although much work must be done, our data indicate that similar mechanisms may regulate the expression of both PRL-R isoforms in immune cells, and “their expression goes hand by hand”. , ,
催乳素(PRL)通过与其受体(PRL- r)结合，在全身发挥多种功能。据报道，两种主要的PRL-R异构体在触发信号通路的能力上存在差异，PRL-R长异构体是激活受体，短异构体是抑制受体。虽然许多自身免疫性疾病表现为高泌乳素血症，但每种PRL-R异构体表达在自身免疫中的作用尚不清楚。本研究旨在探讨女性系统性红斑狼疮患者和健康对照者外周血单个核细胞(PBMCs)中PRL-R亚型表达的相关性。为此，采用ficoll-hypaque方法对狼疮患者(n=9)和健康对照(n=5)的PBMCs进行富集。然后进行RNA提取、cDNA合成和实时荧光定量PCR检测mRNA表达。我们发现狼疮患者的PRL-R长、短异构体表达与健康对照相似。但PRL-RL/PRL-RS比值高于健康对照组(双尾p值< 0.05)。此外，狼疮患者PRL-RL亚型表达与短亚型相关(Spearman r 0,8945;95%置信区间为0.6834 ~ 0.9676;p值双尾<0,0001)。然而，无论是长亚型还是短亚型的表达都与活动性疾病或病程无关。同样，狼疮患者的PRL-R亚型表达与健康对照组相似。虽然还有很多工作要做，但我们的数据表明，类似的机制可能调节免疫细胞中两种PRL-R亚型的表达，并且“它们的表达是密切相关的”。， ，
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Pub Date : 2022-03-20DOI: 10.48141/sbjchem.21scon.29_abstract_almeida.pdf
Cristiana de Barcellos Passinato, Victória Beatriz dos Santos DE OLIVEIRA, Luciana Pereira DE ALMEIDA
Considering the increasing need to develop the argumentation and communication skills of the students, teaching practice has to consider how to do this concerning individual needs and preferences. Meaningful Learning proposes that education should consider the already acquired knowledge of the students in the process of building new learning. Therefore, when applied to the learning process, argumentation is a way to express acquired knowledge to other participants of this process. The Six Thinking Cards game permits students to explore their thinking in focused stages that are represented by the colors proposed in the Six Thinking Hats strategy by Edward De Bono, thus creating an environment where students have time and space to study and think about scientific concepts in a throughway. It is expected that the game also helps students develop soft skills that are considered essential for 21st century learning, such as empathy, communication, problem-solving, and teamwork. The game also adds Libras (Brazilian Sign Language) and Braille (tactile writing system) elements for accessibility purposes towards the objective of building an inclusive classroom. This game should be able to be applied in the chemistry classroom once Covid-19 hard restrictions and quarantine are over and in-person studies are permitted, allowing the authors to do qualitative and quantitative research of this proposal’s reach and relevance for beyond of the projection of this proposal. Interviews with both teachers and students are to understand better how students’ metacognitive skills improve as they engage in cooperative learning and express their ideas.
考虑到越来越需要培养学生的论证和沟通能力，教学实践必须考虑如何根据个人需求和偏好来做到这一点。“有意义学习”主张教育在建构新知识的过程中，应考虑到学生已经获得的知识。因此，当应用于学习过程时，论证是向该过程的其他参与者表达获得的知识的一种方式。Six Thinking Cards游戏让学生在以Edward De Bono的Six Thinking Hats策略中提出的颜色为代表的重点阶段中探索自己的思维，从而为学生创造一个有时间和空间的环境，让他们有时间和空间来学习和思考科学概念。预计该游戏还能帮助学生培养21世纪学习所必需的软技能，如同理心、沟通、解决问题和团队合作。游戏还添加了Libras(巴西手语)和Braille(触觉书写系统)元素，以达到建立包容性教室的目的。一旦Covid-19硬性限制和隔离结束，并且允许面对面研究，这个游戏应该能够在化学课堂上应用，允许作者对该提案的范围和相关性进行定性和定量研究，超出该提案的预测。对教师和学生的访谈是为了更好地了解学生在参与合作学习和表达自己的想法时如何提高元认知技能。
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