Pub Date : 2021-04-20DOI: 10.17074/CPC.V1I40.36425
Natanael Camilo da Costa, Carlos de Jesus
O presente artigo apresenta uma proposta de traducao do latim para o portugues da parte introdutoria do texto Servii commentarius in Artem Donati , a partir do texto da edicao de 1864 dos Grammatici Latini Volume 4 [i] : Probi, Donati, Servii qui feruntur de arte grammatica libri, et Notarum laterculi Edited by Heinrich Keil and Theodor Mommsen (GLK), acompanhada de algumas notas explicativas que podem servir nao apenas como auxilio para localizar o objeto de analise em questao, conduzindo-nos ao correto entendimento do contexto em que os comentarios gramaticais foram escritos, como tambem para utilizar esses comentarios como uma ferramenta de difusao e ensino da gramatica no mundo antigo . [i] Vide KEIL, Heinrich; MOMMSEN, Theodor [ed.]. Grammatici Latini . Probi, Donati, Servii qui feruntur de arte grammatica libri et notarum laterculli (1864). v.4. New York: Cambridge University Press, 2009. pp.405, 406.
本文提出了将Artem Donati中的Servii commentarius文本的引言部分从1864年版的Grammatici第4卷的文本翻译成葡萄牙语的建议：Probi，Donati，Servii qui feruntur de arte grammara libri，et Notarum latercli由Heinrich Keil和Theodor Momsen编辑（GLK），伴随着一些解释性的注释，这些注释不仅可以帮助我们定位所讨论的分析对象，引导我们正确理解语法注释的写作背景，并将这些注释作为在古代传播和教授语法的工具。[i] 参见KEIL，Heinrich；MOMMSEN，Theodor[编辑]。拉丁语语法。Probi，Donati，Servii qui feruntur de arte grammara libri et notarum laterculi（1864）。v.4.纽约：剑桥大学出版社，2009年。第405406页。
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Pub Date : 2021-04-19DOI: 10.17074/CPC.V1I40.36388
Maria Fernanda Gárbero
Escrito em 2012, Clitemnestra. Falso monologo grego , e a peca que encerra a Trilogia Tragica da dramaturga contemporânea Mariana Percovich (Montevideu, 1963), composta por Jocasta. Uma tragedia (2002) e Medeia do Olimar (2009). Em Clitemnestra , encontraremos uma releitura das personagens Agamemnon e Clitemnestra, num monologo tenso que, com o desenrolar do drama, se encaminha para o encontro fatal, atualizando o tempo e questionando os valores da guerra. Tanto na traducao da peca ora apresentada ao publico brasileiro, quanto das outras duas aqui mencionadas, foram utilizados os procedimentos da traducao teatral, isto e: um texto traduzido que tem como horizonte a performance do ator, a dramaturgia e a fluidez das falas no portugues brasileiro.
撰写于2012年，Clitemnestra。虚假的希腊独白，以及乔卡斯塔创作的当代剧作家玛丽安娜·佩尔科维奇悲剧三部曲（蒙得维的亚，1963年）的结尾部分。一场悲剧（2002年）和Medea do Olimar（2009年）。在《克利特梅斯特拉》中，我们会发现重读阿伽门农和克利特梅斯特拉这两个角色，在一段紧张的独白中，随着戏剧的展开，他们走向了致命的相遇，更新了时间，并质疑了战争的价值观。在向巴西公众展示的作品的翻译和这里提到的其他两个作品的翻译中，都使用了戏剧翻译程序，即：翻译文本具有演员的表演、巴西葡萄牙语演讲的戏剧性和流动性。
{"title":"Tradução teatral: Clitemnestra, falso monólogo grego, de Mariana Percovich.","authors":"Maria Fernanda Gárbero","doi":"10.17074/CPC.V1I40.36388","DOIUrl":"https://doi.org/10.17074/CPC.V1I40.36388","url":null,"abstract":"Escrito em 2012, Clitemnestra. Falso monologo grego , e a peca que encerra a Trilogia Tragica da dramaturga contemporânea Mariana Percovich (Montevideu, 1963), composta por Jocasta. Uma tragedia (2002) e Medeia do Olimar (2009). Em Clitemnestra , encontraremos uma releitura das personagens Agamemnon e Clitemnestra, num monologo tenso que, com o desenrolar do drama, se encaminha para o encontro fatal, atualizando o tempo e questionando os valores da guerra. Tanto na traducao da peca ora apresentada ao publico brasileiro, quanto das outras duas aqui mencionadas, foram utilizados os procedimentos da traducao teatral, isto e: um texto traduzido que tem como horizonte a performance do ator, a dramaturgia e a fluidez das falas no portugues brasileiro.","PeriodicalId":10513,"journal":{"name":"Combinatorics, Probability & Computing","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2021-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49442000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
М. А. Бисенова, Р.Е. Бейсенов, А.Л. Мереке, Е.Е. Бейсенова
В статье представлены результаты изменения размеров пор в зависимости от количества порообразующего агента и измерения удельной поверхности в зависимости от температуры спекания. Трехмерный пористый фотоанод производился из смеси наноразмерных порошков Co3O4, и TiO2 с различным количеством порообразующих агентов для дальнейшего смешивания в водном растворе. Исследования морфологии трехмерного тонкопленочного пористого фотоанода методами сканирующего электронного микроскопа показало образование пористой структуры с субмикронными размерами пор зависящих от добавляемого порообразующего агента. Наибольшая площадь поверхности трехмерной структуры будет достигнута с использованием разработанной технологии, использующей смеси материалов, которые играют роль порообразователей в материале анода, которая позволяет повысить эффективность поглощения света за счет создания смешанной или многослойной структуры из нескольких фотокаталитических материалов.
{"title":"Разработка пористых структур на основе оксидных полупроводников","authors":"М. А. Бисенова, Р.Е. Бейсенов, А.Л. Мереке, Е.Е. Бейсенова","doi":"10.18321/CPC409","DOIUrl":"https://doi.org/10.18321/CPC409","url":null,"abstract":"В статье представлены результаты изменения размеров пор в зависимости от количества порообразующего агента и измерения удельной поверхности в зависимости от температуры спекания. Трехмерный пористый фотоанод производился из смеси наноразмерных порошков Co3O4, и TiO2 с различным количеством порообразующих агентов для дальнейшего смешивания в водном растворе. Исследования морфологии трехмерного тонкопленочного пористого фотоанода методами сканирующего электронного микроскопа показало образование пористой структуры с субмикронными размерами пор зависящих от добавляемого порообразующего агента. Наибольшая площадь поверхности трехмерной структуры будет достигнута с использованием разработанной технологии, использующей смеси материалов, которые играют роль порообразователей в материале анода, которая позволяет повысить эффективность поглощения света за счет создания смешанной или многослойной структуры из нескольких фотокаталитических материалов.","PeriodicalId":10513,"journal":{"name":"Combinatorics, Probability & Computing","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2021-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48607846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
За последние десятилетия опубликовано большое количество работ по ингибированию и промотированию горения. Сюда входят как химические добавки, так и использование физических воздействий. Углубленное исследование в каждом случае подразумевает выяснение наиболее важных факторов влияния и выбор максимально эффективного способа управления процессом. В ряде работ указывается на неоднозначность результата в зависимости от количества добавок либо изменения условий. Но причины подобных изменений не всегда понятны. В любом случае следует исходить из взаимосвязи процессов ингибирования и промотирования в волне горения, совместного влияния химических и физических действий для подбора эффективных способов горения, торможения процесса либо получения новых веществ на промежуточных стадиях неполного сгорания.
{"title":"Основные концепции промотирования и ингибирования горения","authors":"В.К. Манжос, Б.Я. Колесников","doi":"10.18321/CPC411","DOIUrl":"https://doi.org/10.18321/CPC411","url":null,"abstract":"За последние десятилетия опубликовано большое количество работ по ингибированию и промотированию горения. Сюда входят как химические добавки, так и использование физических воздействий. Углубленное исследование в каждом случае подразумевает выяснение наиболее важных факторов влияния и выбор максимально эффективного способа управления процессом. В ряде работ указывается на неоднозначность результата в зависимости от количества добавок либо изменения условий. Но причины подобных изменений не всегда понятны. В любом случае следует исходить из взаимосвязи процессов ингибирования и промотирования в волне горения, совместного влияния химических и физических действий для подбора эффективных способов горения, торможения процесса либо получения новых веществ на промежуточных стадиях неполного сгорания.","PeriodicalId":10513,"journal":{"name":"Combinatorics, Probability & Computing","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2021-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44098622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-10DOI: 10.17074/CPC.V1I39.35277
Rodrigo De Miranda
Atraves da analise do drama Antigona (442-1 a.C.), do poeta Sofocles (497/6-406 a.C.), o objetivo do presente escrito e identificar quais sao as reacoes a morte das agentes dramaticas mulheres (Antigona, Ismene e Euridice) e verificar como o poeta representa o feminino em seu teatro atraves de tres formas distintas de luto. Nosso metodo consiste na analise de excertos selecionados – no idioma original, em grego, e em traducoes em portugues e ingles – e previamente justificados, bem como na apresentacao da literatura academica pertinente ao tema. Ao final, concluimos com o levantamento de uma hipotese sobre a relacao paradoxal entre dois desejos da personagem homonima: a saber, o de velar pela familia e, por outro lado, seu anseio por uma morte gloriosa.
{"title":"O luto das mulheres na Antígona, de Sófocles","authors":"Rodrigo De Miranda","doi":"10.17074/CPC.V1I39.35277","DOIUrl":"https://doi.org/10.17074/CPC.V1I39.35277","url":null,"abstract":"Atraves da analise do drama Antigona (442-1 a.C.), do poeta Sofocles (497/6-406 a.C.), o objetivo do presente escrito e identificar quais sao as reacoes a morte das agentes dramaticas mulheres (Antigona, Ismene e Euridice) e verificar como o poeta representa o feminino em seu teatro atraves de tres formas distintas de luto. Nosso metodo consiste na analise de excertos selecionados – no idioma original, em grego, e em traducoes em portugues e ingles – e previamente justificados, bem como na apresentacao da literatura academica pertinente ao tema. Ao final, concluimos com o levantamento de uma hipotese sobre a relacao paradoxal entre dois desejos da personagem homonima: a saber, o de velar pela familia e, por outro lado, seu anseio por uma morte gloriosa.","PeriodicalId":10513,"journal":{"name":"Combinatorics, Probability & Computing","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2021-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42879307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
М.И. Tулепов, Ж. Бексултан, Ш.Е. Габдрашова, Д. А. Байсейтов, И.А. Пустовалов, С. Алешкова
Исследования были выполнены с капсюлечувствительным эмульсионным взрывчатым веществом, представляющим собой концентрированную дисперсию водных растворов – окислителей в среде углеводородов, содержащих добавку эмульгатора и сенсибилизатора – мелкодисперсного алюминия. Приведены краткие сведения о применяемых эмульсионных взрывчатых веществах и результаты испытаний критериев безопасности эмульсионных взрывчатых веществ, содержащих в своем составе маркирующие добавки – органические красители, а так же выводы о воздействии маркирующих добавок на безопасность процессов изготовления и использования эмульсионных взрывчатых веществ в промышленных целях. Определены взрывотехнические параметры эмульсионных взрывчатых веществ как чувствительность к удару 500 мм, чувствительность к трению 235,36 МПа и критическая плотность 1,18 г/см3, соответствующие нормативным показателям заводов изготовителей.
研究是用一种催化剂乳化剂炸药进行的，这种炸药是碳氢化合物中水氧化剂的集中分散，含有乳化剂和感染剂——小分散铝。简要介绍了乳化剂爆炸物的使用情况和乳化剂安全标准测试的结果，其中包括有机染料，以及添加剂对生产和使用乳化剂安全过程的影响。已确定的乳化剂爆炸物的爆破参数为500毫米，235.36 mpa的摩擦敏感度和临界密度为1.18 g / cm3，符合制造商的标准。
{"title":"Экспериментальное определение показателей безопасности эмульсионных взрывчатых веществ, содержащих в качестве маркирующей добавки органические красители","authors":"М.И. Tулепов, Ж. Бексултан, Ш.Е. Габдрашова, Д. А. Байсейтов, И.А. Пустовалов, С. Алешкова","doi":"10.18321/CPC408","DOIUrl":"https://doi.org/10.18321/CPC408","url":null,"abstract":"Исследования были выполнены с капсюлечувствительным эмульсионным взрывчатым веществом, представляющим собой концентрированную дисперсию водных растворов – окислителей в среде углеводородов, содержащих добавку эмульгатора и сенсибилизатора – мелкодисперсного алюминия. Приведены краткие сведения о применяемых эмульсионных взрывчатых веществах и результаты испытаний критериев безопасности эмульсионных взрывчатых веществ, содержащих в своем составе маркирующие добавки – органические красители, а так же выводы о воздействии маркирующих добавок на безопасность процессов изготовления и использования эмульсионных взрывчатых веществ в промышленных целях. Определены взрывотехнические параметры эмульсионных взрывчатых веществ как чувствительность к удару 500 мм, чувствительность к трению 235,36 МПа и критическая плотность 1,18 г/см3, соответствующие нормативным показателям заводов изготовителей.","PeriodicalId":10513,"journal":{"name":"Combinatorics, Probability & Computing","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2021-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46672358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-09DOI: 10.1017/S0963548320000243
G. Omidi
It has been conjectured that, for any fixed [{text{r}} geqslant 2] and sufficiently large n, there is a monochromatic Hamiltonian Berge-cycle in every [({text{r}} - 1)]-colouring of the edges of [{text{K}}_{text{n}}^{text{r}}], the complete r-uniform hypergraph on n vertices. In this paper we prove this conjecture.
{"title":"A proof of a conjecture of Gyárfás, Lehel, Sárközy and Schelp on Berge-cycles","authors":"G. Omidi","doi":"10.1017/S0963548320000243","DOIUrl":"https://doi.org/10.1017/S0963548320000243","url":null,"abstract":"<jats:p>It has been conjectured that, for any fixed <jats:inline-formula><jats:alternatives><jats:inline-graphic xmlns:xlink=\"http://www.w3.org/1999/xlink\" mime-subtype=\"png\" xlink:href=\"S0963548320000243_inline1.png\" /><jats:tex-math>[{text{r}} geqslant 2]</jats:tex-math></jats:alternatives></jats:inline-formula> and sufficiently large <jats:italic>n</jats:italic>, there is a monochromatic Hamiltonian Berge-cycle in every <jats:inline-formula><jats:alternatives><jats:inline-graphic xmlns:xlink=\"http://www.w3.org/1999/xlink\" mime-subtype=\"png\" xlink:href=\"S0963548320000243_inline2.png\" /><jats:tex-math>[({text{r}} - 1)]</jats:tex-math></jats:alternatives></jats:inline-formula>-colouring of the edges of <jats:inline-formula><jats:alternatives><jats:inline-graphic xmlns:xlink=\"http://www.w3.org/1999/xlink\" mime-subtype=\"png\" xlink:href=\"S0963548320000243_inline3.png\" /><jats:tex-math>[{text{K}}_{text{n}}^{text{r}}]</jats:tex-math></jats:alternatives></jats:inline-formula>, the complete <jats:italic>r</jats:italic>-uniform hypergraph on <jats:italic>n</jats:italic> vertices. In this paper we prove this conjecture.</jats:p>","PeriodicalId":10513,"journal":{"name":"Combinatorics, Probability & Computing","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2021-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86787372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-09DOI: 10.17074/CPC.V1I39.34691
Hector Garcia de Andrade
Este artigo apresenta um ponto de vista historico sobre o dialogo platonico Ion , sendo considerada a diferenca do papel exercido pelos poetas na sociedade grega arcaica em relacao a recepcao deles por Platao no periodo classico, representados pela figura do rapsodo. A critica direcionada pelo dialogo a tradicao poetica assinala um processo de laicizacao da poesia, dado o conflito entre os conceitos de entusiasmo e de techne presentes no dialogo e coexistentes na polis classica. A luz das transformacoes sociais por que passou a tradicao poetica, compreende-se a representacao do rapsodo como uma deliberada contradicao.
{"title":"UMA PERSPECTIVA HISTÓRICA SOBRE O ÍON DE PLATÃO","authors":"Hector Garcia de Andrade","doi":"10.17074/CPC.V1I39.34691","DOIUrl":"https://doi.org/10.17074/CPC.V1I39.34691","url":null,"abstract":"Este artigo apresenta um ponto de vista historico sobre o dialogo platonico Ion , sendo considerada a diferenca do papel exercido pelos poetas na sociedade grega arcaica em relacao a recepcao deles por Platao no periodo classico, representados pela figura do rapsodo. A critica direcionada pelo dialogo a tradicao poetica assinala um processo de laicizacao da poesia, dado o conflito entre os conceitos de entusiasmo e de techne presentes no dialogo e coexistentes na polis classica. A luz das transformacoes sociais por que passou a tradicao poetica, compreende-se a representacao do rapsodo como uma deliberada contradicao.","PeriodicalId":10513,"journal":{"name":"Combinatorics, Probability & Computing","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2021-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49647403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-02DOI: 10.2174/1877946811666210302150638
M. Farahmandjou, F. Hoseini
The synthesis of Fe2O3/ZnO has gained acceptance in few years due to its magnetic, photoluminescence and catalytic properties and also, as active element in gas sensors. This type of composite particles has biological and biomedical potential applications such as detection of cancer cells, bacteria and viruses, and magnetic separation. In the present study, first we have synthesized the Fe2O3/ZnO nanoparticles and then structural, optical and surface morphological properties are investigated by XRD, HRTEM, FESEM, XRF and FTIR analyses. Fe2O3-ZnO nanoparticles were fabricated by a solgel synthesis by iron chloride hexahydrate and zinc sulfate heptahydrate. At the beginning, 2g of Polyvinylpyrrolidone (PVP) stabilizer was dissolved in 100 mL dionized water and then 5 g FeCl3 was added to the solution with stirring at room temperature. Then 5g of ZnSO4 was added to the solution and synthesis temperature was increased to 100oC. The product were evaporated for 3 hours, cooled to room temperature and finally calcined at 600oC for 3 hours. The XRD results showed single-phase Fe2O3-ZnO nanocomposits with a hexagonal wurtzite structure of ZnO and spinel phase of rhombohedral α-Fe2O3. The crystallite size of as-prepared sample was determined about 45 nm and annealed one was calculated around 40 nm. The SEM images showed the Fe-Zn nanoparticles change from spherical shape to rod-shape by increasing temperature after annealing. The TEM studies showed the core-shell nanoparticles with mean diameter of 47 nm. The sharp peaks in FTIR spectrum determined the stretching vibrations of Fe and Zn groups in the frequencies of 620, 565 cm-1 and 410 cm-1. The XRD data indicates single-phase Fe2O3-ZnO structure. The SEM images shows that the nanoparticles changed from sphere-like shaped to rod-like shaped by increasing annealing temperature. TEM image exhibits the core-shell Fe-Zn nanoparticles with an average diameter about 37 nm. From the FTIR data, it is shown the presence of Fe-Zn stretching mode and the intensity of the peaks increased by increasing annealing temperature. XRF analysis showed peaks of iron and ferrite elements and an increasing of the Zn weight percent were observed from 26.35 %Wt. to 49.26 %Wt., by increasing temperature.
{"title":"Preparation of Fe2O3-ZnO Nanocomposites: Structure and Optical Properties","authors":"M. Farahmandjou, F. Hoseini","doi":"10.2174/1877946811666210302150638","DOIUrl":"https://doi.org/10.2174/1877946811666210302150638","url":null,"abstract":"\u0000\u0000The synthesis of Fe2O3/ZnO has gained acceptance in few years due to its magnetic, photoluminescence and catalytic properties and also, as active element in gas sensors. This type of composite particles has biological and biomedical potential applications such as detection of cancer cells, bacteria and viruses, and magnetic separation.\u0000\u0000\u0000\u0000In the present study, first we have synthesized the Fe2O3/ZnO nanoparticles and then structural, optical and surface morphological properties are investigated by XRD, HRTEM, FESEM, XRF and FTIR analyses.\u0000\u0000\u0000\u0000Fe2O3-ZnO nanoparticles were fabricated by a solgel synthesis by iron chloride hexahydrate and zinc sulfate heptahydrate. At the beginning, 2g of Polyvinylpyrrolidone (PVP) stabilizer was dissolved in 100 mL dionized water and then 5 g FeCl3 was added to the solution with stirring at room temperature. Then 5g of ZnSO4 was added to the solution and synthesis temperature was increased to 100oC. The product were evaporated for 3 hours, cooled to room temperature and finally calcined at 600oC for 3 hours.\u0000\u0000\u0000\u0000The XRD results showed single-phase Fe2O3-ZnO nanocomposits with a hexagonal wurtzite structure of ZnO and spinel phase of rhombohedral α-Fe2O3. The crystallite size of as-prepared sample was determined about 45 nm and annealed one was calculated around 40 nm. The SEM images showed the Fe-Zn nanoparticles change from spherical shape to rod-shape by increasing temperature after annealing. The TEM studies showed the core-shell nanoparticles with mean diameter of 47 nm. The sharp peaks in FTIR spectrum determined the stretching vibrations of Fe and Zn groups in the frequencies of 620, 565 cm-1 and 410 cm-1.\u0000\u0000\u0000\u0000The XRD data indicates single-phase Fe2O3-ZnO structure. The SEM images shows that the nanoparticles changed from sphere-like shaped to rod-like shaped by increasing annealing temperature. TEM image exhibits the core-shell Fe-Zn nanoparticles with an average diameter about 37 nm. From the FTIR data, it is shown the presence of Fe-Zn stretching mode and the intensity of the peaks increased by increasing annealing temperature. XRF analysis showed peaks of iron and ferrite elements and an increasing of the Zn weight percent were observed from 26.35 %Wt. to 49.26 %Wt., by increasing temperature.\u0000\u0000","PeriodicalId":10513,"journal":{"name":"Combinatorics, Probability & Computing","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2021-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41308427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-01DOI: 10.2174/1877946811666210301143021
V. Anand
Visual pH sensors have received significant attention in the fields of environmental monitoring, analytical chemistry, food safety and biomedicine. Therefore, a single organic moiety showing both naked-eye and fluorescence sensing of pH change are rare and in higher demands. A novel phenothiazine based Schiff base PTz-SB was synthesized via facile organic transformations. This molecule showed promising naked-eye and on-spot pH sensing application, both using UV-visible and fluorescence techniques. The novel phenothiazine based Schiff base was synthesized via facile organic transformation. The Schiff base was applied for both naked eye and fluorescence sensing of pH, using UV-visible and fluorescence techniques, respectively. A redshift of 27 nm and 80 nm was observed in the λmax of absorption and emission spectra, respectively, on changing the pH from 12.2 to 1. The naked-eye pH sensing may be attributed to the change in colour from blue (higher pH) to dark green (lower pH), under daylight conditions. Furthermore, the change in fluorescence spectra is more pronounced. The fluorescence colour of the compound changes from dark blue to green and then finally to orange, on changing the pH from 12.2 to 4 to 1.5, respectively. Moreover, the electrochemical studies of the Schiff base were also procured. The bandgap obtained from the cyclic voltammetry studies was found to be 2.04 eV, which is characteristic of green emission. The easily synthesizable novel Schiff base can be utilized for real-life, on-spot practical application of pH sensing, which does not require sophisticated analytical instruments. Moreover, the time and cost of detection of pH using this thermally robust Schiff base are also very promising.
{"title":"Highly Sensitive, Naked Eye, and On-Spot Detection of pH Change Using Novel Phenothiazine based Schiff Base","authors":"V. Anand","doi":"10.2174/1877946811666210301143021","DOIUrl":"https://doi.org/10.2174/1877946811666210301143021","url":null,"abstract":"\u0000\u0000 Visual pH sensors have received significant attention in the fields of environmental monitoring, analytical chemistry, food safety and biomedicine. Therefore, a single organic moiety showing both naked-eye and fluorescence sensing of pH change are rare and in higher demands. \u0000\u0000\u0000\u0000\u0000A novel phenothiazine based Schiff base PTz-SB was synthesized via facile organic transformations. This molecule showed promising naked-eye and on-spot pH sensing application, both using UV-visible and fluorescence techniques.\u0000\u0000\u0000\u0000\u0000The novel phenothiazine based Schiff base was synthesized via facile organic transformation. The Schiff base was applied for both naked eye and fluorescence sensing of pH, using UV-visible and fluorescence techniques, respectively. \u0000\u0000\u0000\u0000\u0000A redshift of 27 nm and 80 nm was observed in the λmax of absorption and emission spectra, respectively, on changing the pH from 12.2 to 1. \u0000The naked-eye pH sensing may be attributed to the change in colour from blue (higher pH) to dark green (lower pH), under daylight conditions. Furthermore, the change in fluorescence spectra is more pronounced. The fluorescence colour of the compound changes from dark blue to green and then finally to orange, on changing the pH from 12.2 to 4 to 1.5, respectively. Moreover, the electrochemical studies of the Schiff base were also procured. The bandgap obtained from the cyclic voltammetry studies was found to be 2.04 eV, which is characteristic of green emission.\u0000\u0000\u0000\u0000 The easily synthesizable novel Schiff base can be utilized for real-life, on-spot practical application of pH sensing, which does not require sophisticated analytical instruments. Moreover, the time and cost of detection of pH using this thermally robust Schiff base are also very promising.\u0000\u0000","PeriodicalId":10513,"journal":{"name":"Combinatorics, Probability & Computing","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41958107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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