Rafael Anaisce Das Chagas, Alessandra Santana Muniz, Dálete Cristina Brito De Oliveira, Francisca Brenda Araujo Da Silva, Rayanne de Kassia Carvalho Salimos, Mara Rúbia Ferreira Barros, Wagner Cesar Rosa Dos Santos, Marko Herrmann
Naticid gastropods live and forage in the intermareal zone, and are commonly known to prey on bivalve mollusks. Understanding the interspecific predatory relationship of mollusks is important for the functional characterization of the trophic chain. The objective was to study the predation among the naticid gastropod Natica marochiensis on the bivalve Donax striatus. The attraction of gastropods through the locomotion of the bivalves in the substrate was evidenced, as well as a probable olfactory perception through the trails in the sediment from the locomotion of the bivalves. After the prey is perceived, gastropods gradually move on to foraging, covering the prey to suffocate it. There were no perforation marks in the bivalves consumed by N. marochiensis after the experiment. However, it was shown that large gastropods forage both small and large bivalves. Thus, the hypothesis that predatory gastropods prey on only small bivalves is refuted. In situ observations stand out that a small N. marochiensis forages D. striatus with greater body structure, but “hypothetically” by instinct it ends up despising the prey as the energy expenditure during the foraging would not be compensatory.
{"title":"Preliminary observations on gastropod predationnaticids in the eastern Amazon","authors":"Rafael Anaisce Das Chagas, Alessandra Santana Muniz, Dálete Cristina Brito De Oliveira, Francisca Brenda Araujo Da Silva, Rayanne de Kassia Carvalho Salimos, Mara Rúbia Ferreira Barros, Wagner Cesar Rosa Dos Santos, Marko Herrmann","doi":"10.56814/myrnst41","DOIUrl":"https://doi.org/10.56814/myrnst41","url":null,"abstract":"Naticid gastropods live and forage in the intermareal zone, and are commonly known to prey on bivalve mollusks. Understanding the interspecific predatory relationship of mollusks is important for the functional characterization of the trophic chain. The objective was to study the predation among the naticid gastropod Natica marochiensis on the bivalve Donax striatus. The attraction of gastropods through the locomotion of the bivalves in the substrate was evidenced, as well as a probable olfactory perception through the trails in the sediment from the locomotion of the bivalves. After the prey is perceived, gastropods gradually move on to foraging, covering the prey to suffocate it. There were no perforation marks in the bivalves consumed by N. marochiensis after the experiment. However, it was shown that large gastropods forage both small and large bivalves. Thus, the hypothesis that predatory gastropods prey on only small bivalves is refuted. In situ observations stand out that a small N. marochiensis forages D. striatus with greater body structure, but “hypothetically” by instinct it ends up despising the prey as the energy expenditure during the foraging would not be compensatory.","PeriodicalId":30173,"journal":{"name":"Semina Ciencias Exatas e Tecnologicas","volume":"BME-25 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135315572","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 : 2023-08-21DOI: 10.5433/1679-0375.2023.v44.48506
Ariadna Mendoza Cuevas, Jorge Fernández-de-Cossio, N. Ali, Dina Mohamed Atwa
A non-invasive XRD-XRF portable system for Archaeometry based on Angle and Energy Dispersive XRD (Hybrid XRD) plus XRF has been previously proposed by the authors. It gathers an attractive compromise between analytical performance and measurement time, as well as a higher energy penetration with respect to conventional Angle Dispersive XRD (ADXRD). Penetration to inside layers, usually perceived as an inconvenient for non-invasive portable XRF or XRD analyzer, can instead be informative for the proposed hybrid XRD-XRF system to perform depth profiling analysis. This hybrid configuration harness from the redundancy of the data, in the sense that a single XRF or XRD specimen, taken at the same sample point, appears in multiple spectrograms to account for data counting statistics. On this work, the performance of the system on standard reference material, as well as the identification of pigments in the surface layer of paintings is evaluated. Specific Hybrid data processing was conceived to examine the layer structure of the painting, by distinguishing signal patterns of the exposed and the under layers. The system is ventured for the first time to the study of pictorial artworks in coffin and cartonnage samples from ancient Egyptian sarcophagi. Prussian blue pigment in a modeled painting is also discussed.
{"title":"Pigment Identification and Depth Profile in Pictorial Artworks by Non-Invasive Hybrid XRD-XRF Portable System","authors":"Ariadna Mendoza Cuevas, Jorge Fernández-de-Cossio, N. Ali, Dina Mohamed Atwa","doi":"10.5433/1679-0375.2023.v44.48506","DOIUrl":"https://doi.org/10.5433/1679-0375.2023.v44.48506","url":null,"abstract":"A non-invasive XRD-XRF portable system for Archaeometry based on Angle and Energy Dispersive XRD (Hybrid XRD) plus XRF has been previously proposed by the authors. It gathers an attractive compromise between analytical performance and measurement time, as well as a higher energy penetration with respect to conventional Angle Dispersive XRD (ADXRD). Penetration to inside layers, usually perceived as an inconvenient for non-invasive portable XRF or XRD analyzer, can instead be informative for the proposed hybrid XRD-XRF system to perform depth profiling analysis. This hybrid configuration harness from the redundancy of the data, in the sense that a single XRF or XRD specimen, taken at the same sample point, appears in multiple spectrograms to account for data counting statistics. On this work, the performance of the system on standard reference material, as well as the identification of pigments in the surface layer of paintings is evaluated. Specific Hybrid data processing was conceived to examine the layer structure of the painting, by distinguishing signal patterns of the exposed and the under layers. The system is ventured for the first time to the study of pictorial artworks in coffin and cartonnage samples from ancient Egyptian sarcophagi. Prussian blue pigment in a modeled painting is also discussed.","PeriodicalId":30173,"journal":{"name":"Semina Ciencias Exatas e Tecnologicas","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48461440","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 : 2023-08-09DOI: 10.5433/1679-0375.2023.v44.47965
Isamara Lara De Carvalho, R. Pereira de Freitas, Hiram Da Costa Araújo Filho, Ana Luísa De Queiroz Baddini, Ana Letícia Castro de Oliveira, Letícia Silva de Paula, Luisa Malizia Alves
The Brazilian National Library has in its collection a luxurious book of hours from the Royal Library of Portugal. For a long time, it was believed to have been made by the Italian painter Spinello Spinelli for King Fernando I (1345-1383) in 1378. This is due to the information in its colophon and the presence of a coat of arms of the Portuguese crown on the opening folio. According to recent studies, this is an example of a rare group of Flemish books of hours from ca. 1460 to English use – raising questions about the codex origin, dating, recipient, and route. To collaborate in this investigation, a material characterization study was proposed using non-invasive analyses, such as optical microscopy (OM), X-ray fluorescence (XRF), and fiber optics reflectance spectroscopy (FORS). The following pigments and materials were identified: lead white, minium, vermilion, lead-tin yellow, azurite, malachite, brazilwood lake, iron gall inks of different compositions and metals in foil or powder, namely gold and silver; moreover, the identification of lapis lazuli, Armenian bole and a different red organic lake in the colophon was decisive in corroborating the thesis of art historians, confirming the production period of the original body of the manuscript to the 15th century and that the colophon and coat of arms are later additions. Additionally, it was revealed that the coat of arms was superimposed on a previous shield.
{"title":"Characterization of Pigments and Materials of the Original Body and Additions of the Book of Hours 50,1,1 from the Brazilian National Library","authors":"Isamara Lara De Carvalho, R. Pereira de Freitas, Hiram Da Costa Araújo Filho, Ana Luísa De Queiroz Baddini, Ana Letícia Castro de Oliveira, Letícia Silva de Paula, Luisa Malizia Alves","doi":"10.5433/1679-0375.2023.v44.47965","DOIUrl":"https://doi.org/10.5433/1679-0375.2023.v44.47965","url":null,"abstract":"The Brazilian National Library has in its collection a luxurious book of hours from the Royal Library of Portugal. For a long time, it was believed to have been made by the Italian painter Spinello Spinelli for King Fernando I (1345-1383) in 1378. This is due to the information in its colophon and the presence of a coat of arms of the Portuguese crown on the opening folio. According to recent studies, this is an example of a rare group of Flemish books of hours from ca. 1460 to English use – raising questions about the codex origin, dating, recipient, and route. To collaborate in this investigation, a material characterization study was proposed using non-invasive analyses, such as optical microscopy (OM), X-ray fluorescence (XRF), and fiber optics reflectance spectroscopy (FORS). The following pigments and materials were identified: lead white, minium, vermilion, lead-tin yellow, azurite, malachite, brazilwood lake, iron gall inks of different compositions and metals in foil or powder, namely gold and silver; moreover, the identification of lapis lazuli, Armenian bole and a different red organic lake in the colophon was decisive in corroborating the thesis of art historians, confirming the production period of the original body of the manuscript to the 15th century and that the colophon and coat of arms are later additions. Additionally, it was revealed that the coat of arms was superimposed on a previous shield.","PeriodicalId":30173,"journal":{"name":"Semina Ciencias Exatas e Tecnologicas","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42458602","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 : 2023-07-31DOI: 10.5433/1679-0375.2023.v44.47941
Fabio Antonio Cajamarca Suquila, L. A. Bertoldo, Luana Rianne Da Rocha, Alexandra Beal, Milena Do Prado Ferreira, Renan Mendes Ruiz, Tainara Capelari, César Ricardo Teixeira Tarley
The performance of three conventional treatments, including microwave-assisted acid digestion (MWAD), ultrasoundassisted extraction (UAE) and dry method (DAM) for determination of Cu2+ and Zn2+ in flaxseed meal, was evaluated. Quantification was performed by flame atomic absorption spectrometry (FAAS) and differential pulse anode stripping voltammetry (DPASV). TheMWAD treatment was performed with both concentrated HNO3 (CA) and diluted acid (DA). The concentration of Cu2+ was determined by FAAS and DPASV, by different treatments, ranging from 14.4-26.0 μg g−1 and 8.5-17.9 μg g−1, respectively. The concentration of Zn2+ was possible only by FAAS (28.7-77.4 μg g−1). The highest concentrations were obtained using MWAD. The DAM showed values similar to MWAD for Cu2+, however, for Zn2+ it showed the lowest concentrations. UAE, in turn, showed low concentrations of Zn2+ in relation to MWAD, but similar results to MWAD-DA for Cu2+ in a sample with low fat content. Therefore, both the choice of treatment and the quantification technique play a crucial role in metal determination.
{"title":"Determination of Cu2+ and Zn2+ in Flaxseed Flour by FAAS and DPASV using Different Sample Treatments","authors":"Fabio Antonio Cajamarca Suquila, L. A. Bertoldo, Luana Rianne Da Rocha, Alexandra Beal, Milena Do Prado Ferreira, Renan Mendes Ruiz, Tainara Capelari, César Ricardo Teixeira Tarley","doi":"10.5433/1679-0375.2023.v44.47941","DOIUrl":"https://doi.org/10.5433/1679-0375.2023.v44.47941","url":null,"abstract":"The performance of three conventional treatments, including microwave-assisted acid digestion (MWAD), ultrasoundassisted extraction (UAE) and dry method (DAM) for determination of Cu2+ and Zn2+ in flaxseed meal, was evaluated. Quantification was performed by flame atomic absorption spectrometry (FAAS) and differential pulse anode stripping voltammetry (DPASV). TheMWAD treatment was performed with both concentrated HNO3 (CA) and diluted acid (DA). The concentration of Cu2+ was determined by FAAS and DPASV, by different treatments, ranging from 14.4-26.0 μg g−1 and 8.5-17.9 μg g−1, respectively. The concentration of Zn2+ was possible only by FAAS (28.7-77.4 μg g−1). The highest concentrations were obtained using MWAD. The DAM showed values similar to MWAD for Cu2+, however, for Zn2+ it showed the lowest concentrations. UAE, in turn, showed low concentrations of Zn2+ in relation to MWAD, but similar results to MWAD-DA for Cu2+ in a sample with low fat content. Therefore, both the choice of treatment and the quantification technique play a crucial role in metal determination.","PeriodicalId":30173,"journal":{"name":"Semina Ciencias Exatas e Tecnologicas","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41651052","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 : 2023-06-23DOI: 10.5433/1679-0375.2023.v44.47875
Herbert Stein Pereira, T. Santos, M. A. Cirillo, Flávio, Meira Borém, Diana, Del Rocío, Rebaza Fernández
The formulation of coffee blends is of paramount importance for the coffee industry, as it provides the product with an expressive ability to compete in the market and adds sensory attributes that complement the consumption experience. Through redundancy analysis and canonical correspondence analysis, it is possible to study the relationships between a set of sensory notes and a set of blends with different proportions of coffee variety through multivariate linear regression models. However, it is unrealistic to assume that such sensory responses are given linearly in relation to the formulation of the blends, since some coffee species have greater weight in the sensory evaluation (quadratic terms) and the effect of the mixtures (term of interaction). With this motivation, this work aims to propose the use of redundancy analysis and nonlinear correspondence analysis through multivariate polynomial regression to evaluate the acceptance of different varieties of coffee blends according to the scores given by the evaluators. Finally, it is concluded that there were gains in the percentage of total explained variance in the polynomial models in relation to the classic models.
{"title":"Nonlinear Canonical correspondence Analysis: Description of the data of Coffee","authors":"Herbert Stein Pereira, T. Santos, M. A. Cirillo, Flávio, Meira Borém, Diana, Del Rocío, Rebaza Fernández","doi":"10.5433/1679-0375.2023.v44.47875","DOIUrl":"https://doi.org/10.5433/1679-0375.2023.v44.47875","url":null,"abstract":"The formulation of coffee blends is of paramount importance for the coffee industry, as it provides the product with an expressive ability to compete in the market and adds sensory attributes that complement the consumption experience. Through redundancy analysis and canonical correspondence analysis, it is possible to study the relationships between a set of sensory notes and a set of blends with different proportions of coffee variety through multivariate linear regression models. However, it is unrealistic to assume that such sensory responses are given linearly in relation to the formulation of the blends, since some coffee species have greater weight in the sensory evaluation (quadratic terms) and the effect of the mixtures (term of interaction). With this motivation, this work aims to propose the use of redundancy analysis and nonlinear correspondence analysis through multivariate polynomial regression to evaluate the acceptance of different varieties of coffee blends according to the scores given by the evaluators. Finally, it is concluded that there were gains in the percentage of total explained variance in the polynomial models in relation to the classic models.","PeriodicalId":30173,"journal":{"name":"Semina Ciencias Exatas e Tecnologicas","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41447756","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 : 2023-06-23DOI: 10.5433/1679-0375.2023.v44.48045
Márcio Turra de Ávila, L. Cabezas-Gómez, Luben Miguel Cruz Cabezas, Simone Pereira de Souza, Dev Sagar Shrestha
Diesel fuel price is rapidly increasing burdening the agricultural production costs. Additionally, diesel is contributing to a significant amount of life cycle greenhouse gases emissions. Strategically, using agricultural feedstock, such as soybean oil, will reduce fossil fuel price volatility and carbon footprint from agriculture. Although cheaper than biodiesel, use of pure soybean oil has shown to damage a regular diesel engine because of its high viscosity. In this work, a novel technology was developed and tested to overcome this problem by fueling a direct injection Diesel engine with refined soybean oil (edible oil) heated by engine coolant and exhaust gases. Thermal efficiency, air/fuel ratio, fuel injection timing, exhaust temperature and exhaust emissions were evaluated. The major finding of this study was to identify the feasibility of running a modified engine properly with heated soybean oil. The results showed that soybean oil use reduces emissions of nitrogen oxides, but contributes both to lower thermal efficiency and higher emissions of other products such as carbon monoxide and particulate matter compared to fossil diesel. Despite these negative results, solutions to reduce pollutant emissions are feasible.
{"title":"Use of Soybean Oil like as Fuel for Diesel Cycle Engine","authors":"Márcio Turra de Ávila, L. Cabezas-Gómez, Luben Miguel Cruz Cabezas, Simone Pereira de Souza, Dev Sagar Shrestha","doi":"10.5433/1679-0375.2023.v44.48045","DOIUrl":"https://doi.org/10.5433/1679-0375.2023.v44.48045","url":null,"abstract":"Diesel fuel price is rapidly increasing burdening the agricultural production costs. Additionally, diesel is contributing to a significant amount of life cycle greenhouse gases emissions. Strategically, using agricultural feedstock, such as soybean oil, will reduce fossil fuel price volatility and carbon footprint from agriculture. Although cheaper than biodiesel, use of pure soybean oil has shown to damage a regular diesel engine because of its high viscosity. In this work, a novel technology was developed and tested to overcome this problem by fueling a direct injection Diesel engine with refined soybean oil (edible oil) heated by engine coolant and exhaust gases. Thermal efficiency, air/fuel ratio, fuel injection timing, exhaust temperature and exhaust emissions were evaluated. The major finding of this study was to identify the feasibility of running a modified engine properly with heated soybean oil. The results showed that soybean oil use reduces emissions of nitrogen oxides, but contributes both to lower thermal efficiency and higher emissions of other products such as carbon monoxide and particulate matter compared to fossil diesel. Despite these negative results, solutions to reduce pollutant emissions are feasible.","PeriodicalId":30173,"journal":{"name":"Semina Ciencias Exatas e Tecnologicas","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42614307","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 : 2023-06-22DOI: 10.5433/1679-0375.2023.v44.47321
Bruno da Silva Machado, G. B. Alvarez, Diomar Cesar Lobão
Gliomas are malignant brain tumors responsible for 50% of primary human brain cancer cases. They have a combination of rapid growth and invasiveness, and high fatality rates with a median survival time of one year. Mathematical models that describe its growth have helped to improve treatment. In this paper, a combined model formed by terms of two other models known in the literature is analyzed. The combined model is a Reactive-Advective-Diffusive partial differential equation, which is solved by combining the finite difference method, the Crank-Nicolson method and the upwind method. Logistic growth is used for cell proliferation ensuring a saturation threshold for glioma growth, which is crucial to properly estimate patient survival time. The well-known linear-quadratic radiobiological model is used to describe cell death due to radiotherapy treatment. Two initial conditions are compared in the simulations, indicating the need for further studies to have a model as close as possible to reality. Simulation results are shown for four scenarios: no radiotherapy, application of a single dose, and two dose fractionation schemes.
{"title":"Reactive-Advective-Diffusive Models for the Growth of Gliomas Treated with Radiotherapy","authors":"Bruno da Silva Machado, G. B. Alvarez, Diomar Cesar Lobão","doi":"10.5433/1679-0375.2023.v44.47321","DOIUrl":"https://doi.org/10.5433/1679-0375.2023.v44.47321","url":null,"abstract":"Gliomas are malignant brain tumors responsible for 50% of primary human brain cancer cases. They have a combination of rapid growth and invasiveness, and high fatality rates with a median survival time of one year. Mathematical models that describe its growth have helped to improve treatment. In this paper, a combined model formed by terms of two other models known in the literature is analyzed. The combined model is a Reactive-Advective-Diffusive partial differential equation, which is solved by combining the finite difference method, the Crank-Nicolson method and the upwind method. Logistic growth is used for cell proliferation ensuring a saturation threshold for glioma growth, which is crucial to properly estimate patient survival time. The well-known linear-quadratic radiobiological model is used to describe cell death due to radiotherapy treatment. Two initial conditions are compared in the simulations, indicating the need for further studies to have a model as close as possible to reality. Simulation results are shown for four scenarios: no radiotherapy, application of a single dose, and two dose fractionation schemes.","PeriodicalId":30173,"journal":{"name":"Semina Ciencias Exatas e Tecnologicas","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45538618","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 : 2023-05-31DOI: 10.56814/pecen.v7i1.1962
Sabrina Aparecida Batista Maia de Oliveira
As zoonoses provenientes de helmintos parasitos estão presentes na população desde os tempos antigos. Para entender melhor esta relação, foram revisados trabalhos publicados entre os anos de 2009 a 2020 que tratavam sobre zoonoses, helmintos parasitos intestinais, coprólitos e paleoparasitologia. A seleção do material abrangeu tanto trabalhos que utilizaram coprólitos de origem animal quanto de origem humana, respeitando o contexto zoonótico. Buscou-se encontrar as espécies de helmintos parasitas zoonóticos e as causas pelas quais estas zoonoses se estabeleceram na população, sendo uma das principais a domesticação de animais. Os achados foram divididos por continentes, e um resumo foi apresentado em forma de tabela, que mostra os helmintos parasitas, as datações e as suas localizações geográficas. O grupo de helmintos parasitos que mais apareceu nesta revisão foi o dos capilarídeos. Espera-se que este trabalho estimule e incentive estudantes e pesquisadores a se interessarem pelo tema e destaque a importância que as doenças helmínticas tiveram no passado e continuam a apresentar no mundo atual.
{"title":"Doenças parasitárias helmínticas e suas relações zoonóticas com os seres humanos durante o Quaternário: uma revisão","authors":"Sabrina Aparecida Batista Maia de Oliveira","doi":"10.56814/pecen.v7i1.1962","DOIUrl":"https://doi.org/10.56814/pecen.v7i1.1962","url":null,"abstract":"As zoonoses provenientes de helmintos parasitos estão presentes na população desde os tempos antigos. Para entender melhor esta relação, foram revisados trabalhos publicados entre os anos de 2009 a 2020 que tratavam sobre zoonoses, helmintos parasitos intestinais, coprólitos e paleoparasitologia. A seleção do material abrangeu tanto trabalhos que utilizaram coprólitos de origem animal quanto de origem humana, respeitando o contexto zoonótico. Buscou-se encontrar as espécies de helmintos parasitas zoonóticos e as causas pelas quais estas zoonoses se estabeleceram na população, sendo uma das principais a domesticação de animais. Os achados foram divididos por continentes, e um resumo foi apresentado em forma de tabela, que mostra os helmintos parasitas, as datações e as suas localizações geográficas. O grupo de helmintos parasitos que mais apareceu nesta revisão foi o dos capilarídeos. Espera-se que este trabalho estimule e incentive estudantes e pesquisadores a se interessarem pelo tema e destaque a importância que as doenças helmínticas tiveram no passado e continuam a apresentar no mundo atual.","PeriodicalId":30173,"journal":{"name":"Semina Ciencias Exatas e Tecnologicas","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73981446","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 : 2023-05-31DOI: 10.56814/pecen.v7i1.1950
P. H. R. Peixoto, M. Oliveira, Adonias Marques Barros
Este texto é o primeiro de uma série voltada a estudantes de física no início de sua graduação. Tal série apresentará, junto com outro texto publicado nesta mesma revista - "Um curso rápido de cálculo diferencial e integral para pré-universitários e calouros" -, a matemática necessária ao estudo de coleções típicas de física básica em nível universitário, geralmente trabalhadas ao longo de quatro semestres, no Brasil. Há várias atividades para os estudantes, com respostas.
{"title":"Um curso de matemática para estudantes de física do primeiro ano - Parte I","authors":"P. H. R. Peixoto, M. Oliveira, Adonias Marques Barros","doi":"10.56814/pecen.v7i1.1950","DOIUrl":"https://doi.org/10.56814/pecen.v7i1.1950","url":null,"abstract":"Este texto é o primeiro de uma série voltada a estudantes de física no início de sua graduação. Tal série apresentará, junto com outro texto publicado nesta mesma revista - \"Um curso rápido de cálculo diferencial e integral para pré-universitários e calouros\" -, a matemática necessária ao estudo de coleções típicas de física básica em nível universitário, geralmente trabalhadas ao longo de quatro semestres, no Brasil. Há várias atividades para os estudantes, com respostas.","PeriodicalId":30173,"journal":{"name":"Semina Ciencias Exatas e Tecnologicas","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74405223","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 : 2023-05-31DOI: 10.56814/pecen.v7i1.1961
Soline Maria Gonçalves Ikeda, Marcelo Dib Cruz, Wagner de Souza Tassinari, Angel Ramon Sanchez Delgado
Apresenta-se uma heurística computacional que utiliza a metaheurística GRASP para simular a rotação de culturas agrícolas, de tal modo que o agricultor possa planejar as culturas a serem plantadas em cada época e em cada lote (s) ao longo do ano (s). Trata-se de um método iterativo de duas fases. Na primeira gera-se uma solução inicial e a partir desta, em uma segunda fase, são realizadas buscas locais com o objetivo de melhorar a solução encontrada. Ensaios numéricos para testar a heurística com trinta culturas agrícolas, e dez, quinze e vinte lotes, foram realizados. Os resultados obtidos foram satisfatórios ao ser comparados com conhecidos na literatura.
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